4656 lines
163 KiB
Plaintext
4656 lines
163 KiB
Plaintext
What has changed in GDB?
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(Organized release by release)
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*** Changes since GDB 7.3.1
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* GDB has two new commands: "set remote hardware-watchpoint-length-limit"
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and "show remote hardware-watchpoint-length-limit". These allows to
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set or show the maximum length limit (in bytes) of a remote
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target hardware watchpoint.
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This allows e.g. to use "unlimited" hardware watchpoints with the
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gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind
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watchpoints are slower than real hardware watchpoints but are
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significantly faster than gdb software watchpoints.
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* Python scripting
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** The register_pretty_printer function in module gdb.printing now takes
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an optional `replace' argument. If True, the new printer replaces any
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existing one.
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** The "maint set python print-stack on|off" command has been
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deprecated, and a new command: "set python print-stack on|off" has
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replaced it. Additionally, the default for "print-stack" is now
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"off".
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** A prompt subsitution hook (prompt_hook) is now available to the
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Python API.
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** A new command set/show extended-prompt has been added.
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** A new Python module, gdb.prompt has been added to the GDB Python
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modules library. This module provides functionality for
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escape sequentions in prompts (used by set/show
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extended-prompt). These escape sequences are replaced by their
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corresponding value.
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** Python commands and convenience-functions located in
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'data-directory'/python/gdb/command and
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'data-directory'/python/gdb/function are now automatically loaded
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on GDB start-up.
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** Blocks now provide four new attributes. global_block and
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static_block will return the global and static blocks
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respectively. is_static and is_global are boolean attributes
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that indicate if the block is one of those two types.
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** Symbols now provide the "type" attribute, the type of the symbol.
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** The "gdb.breakpoint" function has been deprecated in favor of
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"gdb.breakpoints".
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** Type objects for struct and union types now allow access to
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the fields using standard Python dictionary (mapping) methods.
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For example, "some_type['myfield']" now works, as does
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"some_type.items()".
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** A new event "gdb.new_objfile" has been added, triggered by loading a
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new object file.
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* libthread-db-search-path now supports two special values: $sdir and $pdir.
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$sdir specifies the default system locations of shared libraries.
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$pdir specifies the directory where the libpthread used by the application
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lives.
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GDB no longer looks in $sdir and $pdir after it has searched the directories
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mentioned in libthread-db-search-path. If you want to search those
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directories, they must be specified in libthread-db-search-path.
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The default value of libthread-db-search-path on GNU/Linux and Solaris
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systems is now "$sdir:$pdir".
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$pdir is not supported by gdbserver, it is currently ignored.
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$sdir is supported by gdbserver.
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* New configure option --with-iconv-bin.
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When using the internationalization support like the one in the GNU C
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library, GDB will invoke the "iconv" program to get a list of supported
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character sets. If this program lives in a non-standard location, one can
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use this option to specify where to find it.
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* When natively debugging programs on PowerPC BookE processors running
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a Linux kernel version 2.6.34 or later, GDB supports masked hardware
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watchpoints, which specify a mask in addition to an address to watch.
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The mask specifies that some bits of an address (the bits which are
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reset in the mask) should be ignored when matching the address accessed
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by the inferior against the watchpoint address. See the "PowerPC Embedded"
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section in the user manual for more details.
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* The new option --once causes GDBserver to stop listening for connections once
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the first connection is made. The listening port used by GDBserver will
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become available after that.
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* New commands "info macros", "info definitions",
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and "alias" have been added.
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* New function parameters suffix @entry specifies value of function parameter
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at the time the function got called. Entry values are available only since
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gcc version 4.7.
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* Changed commands
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watch EXPRESSION mask MASK_VALUE
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The watch command now supports the mask argument which allows creation
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of masked watchpoints, if the current architecture supports this feature.
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info auto-load-scripts [REGEXP]
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This command was formerly named "maintenance print section-scripts".
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It is now generally useful and is no longer a maintenance-only command.
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* Tracepoints can now be enabled and disabled at any time after a trace
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experiment has been started using the standard "enable" and "disable"
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commands. It is now possible to start a trace experiment with no enabled
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tracepoints; GDB will display a warning, but will allow the experiment to
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begin, assuming that tracepoints will be enabled as needed while the trace
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is running.
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* New options
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set print entry-values (both|compact|default|if-needed|no|only|preferred)
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show print entry-values
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Set printing of frame argument values at function entry. In some cases
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GDB can determine the value of function argument which was passed by the
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function caller, even if the value was modified inside the called function.
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set debug entry-values
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show debug entry-values
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Control display of debugging info for determining frame argument values at
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function entry and virtual tail call frames.
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* New remote packets
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QTEnable
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Dynamically enable a tracepoint in a started trace experiment.
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QTDisable
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Dynamically disable a tracepoint in a started trace experiment.
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* Dcache size (number of lines) and line-size are now runtime-configurable
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via "set dcache line" and "set dcache line-size" commands.
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* New targets
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Texas Instruments TMS320C6x tic6x-*-*
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*** Changes in GDB 7.3.1
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* The build failure for NetBSD and OpenBSD targets have now been fixed.
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*** Changes in GDB 7.3
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* GDB has a new command: "thread find [REGEXP]".
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It finds the thread id whose name, target id, or thread extra info
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matches the given regular expression.
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* The "catch syscall" command now works on mips*-linux* targets.
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* The -data-disassemble MI command now supports modes 2 and 3 for
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dumping the instruction opcodes.
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* New command line options
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-data-directory DIR Specify DIR as the "data-directory".
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This is mostly for testing purposes.
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* The "maint set python auto-load on|off" command has been renamed to
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"set auto-load-scripts on|off".
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* GDB has a new command: "set directories".
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It is like the "dir" command except that it replaces the
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source path list instead of augmenting it.
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* GDB now understands thread names.
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On GNU/Linux, "info threads" will display the thread name as set by
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prctl or pthread_setname_np.
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There is also a new command, "thread name", which can be used to
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assign a name internally for GDB to display.
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* OpenCL C
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Initial support for the OpenCL C language (http://www.khronos.org/opencl)
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has been integrated into GDB.
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* Python scripting
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** The function gdb.Write now accepts an optional keyword 'stream'.
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This keyword, when provided, will direct the output to either
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stdout, stderr, or GDB's logging output.
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** Parameters can now be be sub-classed in Python, and in particular
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you may implement the get_set_doc and get_show_doc functions.
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This improves how Parameter set/show documentation is processed
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and allows for more dynamic content.
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** Symbols, Symbol Table, Symbol Table and Line, Object Files,
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Inferior, Inferior Thread, Blocks, and Block Iterator APIs now
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have an is_valid method.
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** Breakpoints can now be sub-classed in Python, and in particular
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you may implement a 'stop' function that is executed each time
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the inferior reaches that breakpoint.
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** New function gdb.lookup_global_symbol looks up a global symbol.
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** GDB values in Python are now callable if the value represents a
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function. For example, if 'some_value' represents a function that
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takes two integer parameters and returns a value, you can call
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that function like so:
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result = some_value (10,20)
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** Module gdb.types has been added.
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It contains a collection of utilities for working with gdb.Types objects:
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get_basic_type, has_field, make_enum_dict.
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** Module gdb.printing has been added.
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It contains utilities for writing and registering pretty-printers.
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New classes: PrettyPrinter, SubPrettyPrinter,
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RegexpCollectionPrettyPrinter.
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New function: register_pretty_printer.
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** New commands "info pretty-printers", "enable pretty-printer" and
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"disable pretty-printer" have been added.
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** gdb.parameter("directories") is now available.
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** New function gdb.newest_frame returns the newest frame in the
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selected thread.
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** The gdb.InferiorThread class has a new "name" attribute. This
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holds the thread's name.
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** Python Support for Inferior events.
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Python scripts can add observers to be notified of events
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occurring in the process being debugged.
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The following events are currently supported:
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- gdb.events.cont Continue event.
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- gdb.events.exited Inferior exited event.
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- gdb.events.stop Signal received, and Breakpoint hit events.
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* C++ Improvements:
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** GDB now puts template parameters in scope when debugging in an
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instantiation. For example, if you have:
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template<int X> int func (void) { return X; }
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then if you step into func<5>, "print X" will show "5". This
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feature requires proper debuginfo support from the compiler; it
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was added to GCC 4.5.
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** The motion commands "next", "finish", "until", and "advance" now
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work better when exceptions are thrown. In particular, GDB will
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no longer lose control of the inferior; instead, the GDB will
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stop the inferior at the point at which the exception is caught.
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This functionality requires a change in the exception handling
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code that was introduced in GCC 4.5.
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* GDB now follows GCC's rules on accessing volatile objects when
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reading or writing target state during expression evaluation.
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One notable difference to prior behavior is that "print x = 0"
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no longer generates a read of x; the value of the assignment is
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now always taken directly from the value being assigned.
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* GDB now has some support for using labels in the program's source in
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linespecs. For instance, you can use "advance label" to continue
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execution to a label.
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* GDB now has support for reading and writing a new .gdb_index
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section. This section holds a fast index of DWARF debugging
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information and can be used to greatly speed up GDB startup and
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operation. See the documentation for `save gdb-index' for details.
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* The "watch" command now accepts an optional "-location" argument.
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When used, this causes GDB to watch the memory referred to by the
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expression. Such a watchpoint is never deleted due to it going out
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of scope.
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* GDB now supports thread debugging of core dumps on GNU/Linux.
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GDB now activates thread debugging using the libthread_db library
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when debugging GNU/Linux core dumps, similarly to when debugging
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live processes. As a result, when debugging a core dump file, GDB
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is now able to display pthread_t ids of threads. For example, "info
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threads" shows the same output as when debugging the process when it
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was live. In earlier releases, you'd see something like this:
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(gdb) info threads
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* 1 LWP 6780 main () at main.c:10
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While now you see this:
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(gdb) info threads
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* 1 Thread 0x7f0f5712a700 (LWP 6780) main () at main.c:10
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It is also now possible to inspect TLS variables when debugging core
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dumps.
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When debugging a core dump generated on a machine other than the one
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used to run GDB, you may need to point GDB at the correct
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libthread_db library with the "set libthread-db-search-path"
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command. See the user manual for more details on this command.
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* When natively debugging programs on PowerPC BookE processors running
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a Linux kernel version 2.6.34 or later, GDB supports ranged breakpoints,
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which stop execution of the inferior whenever it executes an instruction
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at any address within the specified range. See the "PowerPC Embedded"
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section in the user manual for more details.
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* New features in the GDB remote stub, GDBserver
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** GDBserver is now supported on PowerPC LynxOS (versions 4.x and 5.x),
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and i686 LynxOS (version 5.x).
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** GDBserver is now supported on Blackfin Linux.
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* New native configurations
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ia64 HP-UX ia64-*-hpux*
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* New targets:
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Analog Devices, Inc. Blackfin Processor bfin-*
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* Ada task switching is now supported on sparc-elf targets when
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debugging a program using the Ravenscar Profile. For more information,
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see the "Tasking Support when using the Ravenscar Profile" section
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in the GDB user manual.
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* Guile support was removed.
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* New features in the GNU simulator
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** The --map-info flag lists all known core mappings.
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** CFI flashes may be simulated via the "cfi" device.
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*** Changes in GDB 7.2
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* Shared library support for remote targets by default
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When GDB is configured for a generic, non-OS specific target, like
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for example, --target=arm-eabi or one of the many *-*-elf targets,
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GDB now queries remote stubs for loaded shared libraries using the
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`qXfer:libraries:read' packet. Previously, shared library support
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was always disabled for such configurations.
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* C++ Improvements:
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** Argument Dependent Lookup (ADL)
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In C++ ADL lookup directs function search to the namespaces of its
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arguments even if the namespace has not been imported.
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For example:
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namespace A
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{
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class B { };
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void foo (B) { }
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}
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...
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A::B b
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foo(b)
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Here the compiler will search for `foo' in the namespace of 'b'
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and find A::foo. GDB now supports this. This construct is commonly
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used in the Standard Template Library for operators.
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** Improved User Defined Operator Support
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In addition to member operators, GDB now supports lookup of operators
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defined in a namespace and imported with a `using' directive, operators
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defined in the global scope, operators imported implicitly from an
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anonymous namespace, and the ADL operators mentioned in the previous
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entry.
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GDB now also supports proper overload resolution for all the previously
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mentioned flavors of operators.
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** static const class members
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Printing of static const class members that are initialized in the
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class definition has been fixed.
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* Windows Thread Information Block access.
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On Windows targets, GDB now supports displaying the Windows Thread
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Information Block (TIB) structure. This structure is visible either
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by using the new command `info w32 thread-information-block' or, by
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dereferencing the new convenience variable named `$_tlb', a
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thread-specific pointer to the TIB. This feature is also supported
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when remote debugging using GDBserver.
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* Static tracepoints
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Static tracepoints are calls in the user program into a tracing
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library. One such library is a port of the LTTng kernel tracer to
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userspace --- UST (LTTng Userspace Tracer, http://lttng.org/ust).
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When debugging with GDBserver, GDB now supports combining the GDB
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tracepoint machinery with such libraries. For example: the user can
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use GDB to probe a static tracepoint marker (a call from the user
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program into the tracing library) with the new "strace" command (see
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"New commands" below). This creates a "static tracepoint" in the
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breakpoint list, that can be manipulated with the same feature set
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as fast and regular tracepoints. E.g., collect registers, local and
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global variables, collect trace state variables, and define
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tracepoint conditions. In addition, the user can collect extra
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static tracepoint marker specific data, by collecting the new
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$_sdata internal variable. When analyzing the trace buffer, you can
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inspect $_sdata like any other variable available to GDB. For more
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information, see the "Tracepoints" chapter in GDB user manual. New
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remote packets have been defined to support static tracepoints, see
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the "New remote packets" section below.
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* Better reconstruction of tracepoints after disconnected tracing
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GDB will attempt to download the original source form of tracepoint
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definitions when starting a trace run, and then will upload these
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upon reconnection to the target, resulting in a more accurate
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reconstruction of the tracepoints that are in use on the target.
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* Observer mode
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You can now exercise direct control over the ways that GDB can
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affect your program. For instance, you can disallow the setting of
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breakpoints, so that the program can run continuously (assuming
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non-stop mode). In addition, the "observer" variable is available
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to switch all of the different controls; in observer mode, GDB
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cannot affect the target's behavior at all, which is useful for
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tasks like diagnosing live systems in the field.
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* The new convenience variable $_thread holds the number of the
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current thread.
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* New remote packets
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qGetTIBAddr
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Return the address of the Windows Thread Information Block of a given thread.
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qRelocInsn
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In response to several of the tracepoint packets, the target may now
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also respond with a number of intermediate `qRelocInsn' request
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packets before the final result packet, to have GDB handle
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relocating an instruction to execute at a different address. This
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is particularly useful for stubs that support fast tracepoints. GDB
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reports support for this feature in the qSupported packet.
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qTfSTM, qTsSTM
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List static tracepoint markers in the target program.
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qTSTMat
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List static tracepoint markers at a given address in the target
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program.
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qXfer:statictrace:read
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Read the static trace data collected (by a `collect $_sdata'
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tracepoint action). The remote stub reports support for this packet
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to gdb's qSupported query.
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QAllow
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Send the current settings of GDB's permission flags.
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QTDPsrc
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Send part of the source (textual) form of a tracepoint definition,
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which includes location, conditional, and action list.
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* The source command now accepts a -s option to force searching for the
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script in the source search path even if the script name specifies
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a directory.
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* New features in the GDB remote stub, GDBserver
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- GDBserver now support tracepoints (including fast tracepoints, and
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static tracepoints). The feature is currently supported by the
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i386-linux and amd64-linux builds. See the "Tracepoints support
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in gdbserver" section in the manual for more information.
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GDBserver JIT compiles the tracepoint's conditional agent
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expression bytecode into native code whenever possible for low
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overhead dynamic tracepoints conditionals. For such tracepoints,
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an expression that examines program state is evaluated when the
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tracepoint is reached, in order to determine whether to capture
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trace data. If the condition is simple and false, processing the
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tracepoint finishes very quickly and no data is gathered.
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GDBserver interfaces with the UST (LTTng Userspace Tracer) library
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for static tracepoints support.
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- GDBserver now supports x86_64 Windows 64-bit debugging.
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* GDB now sends xmlRegisters= in qSupported packet to indicate that
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it understands register description.
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* The --batch flag now disables pagination and queries.
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* X86 general purpose registers
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GDB now supports reading/writing byte, word and double-word x86
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general purpose registers directly. This means you can use, say,
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$ah or $ax to refer, respectively, to the byte register AH and
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16-bit word register AX that are actually portions of the 32-bit
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register EAX or 64-bit register RAX.
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|
|
* The `commands' command now accepts a range of breakpoints to modify.
|
|
A plain `commands' following a command that creates multiple
|
|
breakpoints affects all the breakpoints set by that command. This
|
|
applies to breakpoints set by `rbreak', and also applies when a
|
|
single `break' command creates multiple breakpoints (e.g.,
|
|
breakpoints on overloaded c++ functions).
|
|
|
|
* The `rbreak' command now accepts a filename specification as part of
|
|
its argument, limiting the functions selected by the regex to those
|
|
in the specified file.
|
|
|
|
* Support for remote debugging Windows and SymbianOS shared libraries
|
|
from Unix hosts has been improved. Non Windows GDB builds now can
|
|
understand target reported file names that follow MS-DOS based file
|
|
system semantics, such as file names that include drive letters and
|
|
use the backslash character as directory separator. This makes it
|
|
possible to transparently use the "set sysroot" and "set
|
|
solib-search-path" on Unix hosts to point as host copies of the
|
|
target's shared libraries. See the new command "set
|
|
target-file-system-kind" described below, and the "Commands to
|
|
specify files" section in the user manual for more information.
|
|
|
|
* New commands
|
|
|
|
eval template, expressions...
|
|
Convert the values of one or more expressions under the control
|
|
of the string template to a command line, and call it.
|
|
|
|
set target-file-system-kind unix|dos-based|auto
|
|
show target-file-system-kind
|
|
Set or show the assumed file system kind for target reported file
|
|
names.
|
|
|
|
save breakpoints <filename>
|
|
Save all current breakpoint definitions to a file suitable for use
|
|
in a later debugging session. To read the saved breakpoint
|
|
definitions, use the `source' command.
|
|
|
|
`save tracepoints' is a new alias for `save-tracepoints'. The latter
|
|
is now deprecated.
|
|
|
|
info static-tracepoint-markers
|
|
Display information about static tracepoint markers in the target.
|
|
|
|
strace FN | FILE:LINE | *ADDR | -m MARKER_ID
|
|
Define a static tracepoint by probing a marker at the given
|
|
function, line, address, or marker ID.
|
|
|
|
set observer on|off
|
|
show observer
|
|
Enable and disable observer mode.
|
|
|
|
set may-write-registers on|off
|
|
set may-write-memory on|off
|
|
set may-insert-breakpoints on|off
|
|
set may-insert-tracepoints on|off
|
|
set may-insert-fast-tracepoints on|off
|
|
set may-interrupt on|off
|
|
Set individual permissions for GDB effects on the target. Note that
|
|
some of these settings can have undesirable or surprising
|
|
consequences, particularly when changed in the middle of a session.
|
|
For instance, disabling the writing of memory can prevent
|
|
breakpoints from being inserted, cause single-stepping to fail, or
|
|
even crash your program, if you disable after breakpoints have been
|
|
inserted. However, GDB should not crash.
|
|
|
|
set record memory-query on|off
|
|
show record memory-query
|
|
Control whether to stop the inferior if memory changes caused
|
|
by an instruction cannot be recorded.
|
|
|
|
* Changed commands
|
|
|
|
disassemble
|
|
The disassemble command now supports "start,+length" form of two arguments.
|
|
|
|
* Python scripting
|
|
|
|
** GDB now provides a new directory location, called the python directory,
|
|
where Python scripts written for GDB can be installed. The location
|
|
of that directory is <data-directory>/python, where <data-directory>
|
|
is the GDB data directory. For more details, see section `Scripting
|
|
GDB using Python' in the manual.
|
|
|
|
** The GDB Python API now has access to breakpoints, symbols, symbol
|
|
tables, program spaces, inferiors, threads and frame's code blocks.
|
|
Additionally, GDB Parameters can now be created from the API, and
|
|
manipulated via set/show in the CLI.
|
|
|
|
** New functions gdb.target_charset, gdb.target_wide_charset,
|
|
gdb.progspaces, gdb.current_progspace, and gdb.string_to_argv.
|
|
|
|
** New exception gdb.GdbError.
|
|
|
|
** Pretty-printers are now also looked up in the current program space.
|
|
|
|
** Pretty-printers can now be individually enabled and disabled.
|
|
|
|
** GDB now looks for names of Python scripts to auto-load in a
|
|
special section named `.debug_gdb_scripts', in addition to looking
|
|
for a OBJFILE-gdb.py script when OBJFILE is read by the debugger.
|
|
|
|
* Tracepoint actions were unified with breakpoint commands. In particular,
|
|
there are no longer differences in "info break" output for breakpoints and
|
|
tracepoints and the "commands" command can be used for both tracepoints and
|
|
regular breakpoints.
|
|
|
|
* New targets
|
|
|
|
ARM Symbian arm*-*-symbianelf*
|
|
|
|
* D language support.
|
|
GDB now supports debugging programs written in the D programming
|
|
language.
|
|
|
|
* GDB now supports the extended ptrace interface for PowerPC which is
|
|
available since Linux kernel version 2.6.34. This automatically enables
|
|
any hardware breakpoints and additional hardware watchpoints available in
|
|
the processor. The old ptrace interface exposes just one hardware
|
|
watchpoint and no hardware breakpoints.
|
|
|
|
* GDB is now able to use the Data Value Compare (DVC) register available on
|
|
embedded PowerPC processors to implement in hardware simple watchpoint
|
|
conditions of the form:
|
|
|
|
watch ADDRESS|VARIABLE if ADDRESS|VARIABLE == CONSTANT EXPRESSION
|
|
|
|
This works in native GDB running on Linux kernels with the extended ptrace
|
|
interface mentioned above.
|
|
|
|
*** Changes in GDB 7.1
|
|
|
|
* C++ Improvements
|
|
|
|
** Namespace Support
|
|
|
|
GDB now supports importing of namespaces in C++. This enables the
|
|
user to inspect variables from imported namespaces. Support for
|
|
namepace aliasing has also been added. So, if a namespace is
|
|
aliased in the current scope (e.g. namepace C=A; ) the user can
|
|
print variables using the alias (e.g. (gdb) print C::x).
|
|
|
|
** Bug Fixes
|
|
|
|
All known bugs relating to the printing of virtual base class were
|
|
fixed. It is now possible to call overloaded static methods using a
|
|
qualified name.
|
|
|
|
** Cast Operators
|
|
|
|
The C++ cast operators static_cast<>, dynamic_cast<>, const_cast<>,
|
|
and reinterpret_cast<> are now handled by the C++ expression parser.
|
|
|
|
* New targets
|
|
|
|
Xilinx MicroBlaze microblaze-*-*
|
|
Renesas RX rx-*-elf
|
|
|
|
* New Simulators
|
|
|
|
Xilinx MicroBlaze microblaze
|
|
Renesas RX rx
|
|
|
|
* Multi-program debugging.
|
|
|
|
GDB now has support for multi-program (a.k.a. multi-executable or
|
|
multi-exec) debugging. This allows for debugging multiple inferiors
|
|
simultaneously each running a different program under the same GDB
|
|
session. See "Debugging Multiple Inferiors and Programs" in the
|
|
manual for more information. This implied some user visible changes
|
|
in the multi-inferior support. For example, "info inferiors" now
|
|
lists inferiors that are not running yet or that have exited
|
|
already. See also "New commands" and "New options" below.
|
|
|
|
* New tracing features
|
|
|
|
GDB's tracepoint facility now includes several new features:
|
|
|
|
** Trace state variables
|
|
|
|
GDB tracepoints now include support for trace state variables, which
|
|
are variables managed by the target agent during a tracing
|
|
experiment. They are useful for tracepoints that trigger each
|
|
other, so for instance one tracepoint can count hits in a variable,
|
|
and then a second tracepoint has a condition that is true when the
|
|
count reaches a particular value. Trace state variables share the
|
|
$-syntax of GDB convenience variables, and can appear in both
|
|
tracepoint actions and condition expressions. Use the "tvariable"
|
|
command to create, and "info tvariables" to view; see "Trace State
|
|
Variables" in the manual for more detail.
|
|
|
|
** Fast tracepoints
|
|
|
|
GDB now includes an option for defining fast tracepoints, which
|
|
targets may implement more efficiently, such as by installing a jump
|
|
into the target agent rather than a trap instruction. The resulting
|
|
speedup can be by two orders of magnitude or more, although the
|
|
tradeoff is that some program locations on some target architectures
|
|
might not allow fast tracepoint installation, for instance if the
|
|
instruction to be replaced is shorter than the jump. To request a
|
|
fast tracepoint, use the "ftrace" command, with syntax identical to
|
|
the regular trace command.
|
|
|
|
** Disconnected tracing
|
|
|
|
It is now possible to detach GDB from the target while it is running
|
|
a trace experiment, then reconnect later to see how the experiment
|
|
is going. In addition, a new variable disconnected-tracing lets you
|
|
tell the target agent whether to continue running a trace if the
|
|
connection is lost unexpectedly.
|
|
|
|
** Trace files
|
|
|
|
GDB now has the ability to save the trace buffer into a file, and
|
|
then use that file as a target, similarly to you can do with
|
|
corefiles. You can select trace frames, print data that was
|
|
collected in them, and use tstatus to display the state of the
|
|
tracing run at the moment that it was saved. To create a trace
|
|
file, use "tsave <filename>", and to use it, do "target tfile
|
|
<name>".
|
|
|
|
** Circular trace buffer
|
|
|
|
You can ask the target agent to handle the trace buffer as a
|
|
circular buffer, discarding the oldest trace frames to make room for
|
|
newer ones, by setting circular-trace-buffer to on. This feature may
|
|
not be available for all target agents.
|
|
|
|
* Changed commands
|
|
|
|
disassemble
|
|
The disassemble command, when invoked with two arguments, now requires
|
|
the arguments to be comma-separated.
|
|
|
|
info variables
|
|
The info variables command now displays variable definitions. Files
|
|
which only declare a variable are not shown.
|
|
|
|
source
|
|
The source command is now capable of sourcing Python scripts.
|
|
This feature is dependent on the debugger being build with Python
|
|
support.
|
|
|
|
Related to this enhancement is also the introduction of a new command
|
|
"set script-extension" (see below).
|
|
|
|
* New commands (for set/show, see "New options" below)
|
|
|
|
record save [<FILENAME>]
|
|
Save a file (in core file format) containing the process record
|
|
execution log for replay debugging at a later time.
|
|
|
|
record restore <FILENAME>
|
|
Restore the process record execution log that was saved at an
|
|
earlier time, for replay debugging.
|
|
|
|
add-inferior [-copies <N>] [-exec <FILENAME>]
|
|
Add a new inferior.
|
|
|
|
clone-inferior [-copies <N>] [ID]
|
|
Make a new inferior ready to execute the same program another
|
|
inferior has loaded.
|
|
|
|
remove-inferior ID
|
|
Remove an inferior.
|
|
|
|
maint info program-spaces
|
|
List the program spaces loaded into GDB.
|
|
|
|
set remote interrupt-sequence [Ctrl-C | BREAK | BREAK-g]
|
|
show remote interrupt-sequence
|
|
Allow the user to select one of ^C, a BREAK signal or BREAK-g
|
|
as the sequence to the remote target in order to interrupt the execution.
|
|
Ctrl-C is a default. Some system prefers BREAK which is high level of
|
|
serial line for some certain time. Linux kernel prefers BREAK-g, a.k.a
|
|
Magic SysRq g. It is BREAK signal and character 'g'.
|
|
|
|
set remote interrupt-on-connect [on | off]
|
|
show remote interrupt-on-connect
|
|
When interrupt-on-connect is ON, gdb sends interrupt-sequence to
|
|
remote target when gdb connects to it. This is needed when you debug
|
|
Linux kernel.
|
|
|
|
set remotebreak [on | off]
|
|
show remotebreak
|
|
Deprecated. Use "set/show remote interrupt-sequence" instead.
|
|
|
|
tvariable $NAME [ = EXP ]
|
|
Create or modify a trace state variable.
|
|
|
|
info tvariables
|
|
List trace state variables and their values.
|
|
|
|
delete tvariable $NAME ...
|
|
Delete one or more trace state variables.
|
|
|
|
teval EXPR, ...
|
|
Evaluate the given expressions without collecting anything into the
|
|
trace buffer. (Valid in tracepoint actions only.)
|
|
|
|
ftrace FN / FILE:LINE / *ADDR
|
|
Define a fast tracepoint at the given function, line, or address.
|
|
|
|
* New expression syntax
|
|
|
|
GDB now parses the 0b prefix of binary numbers the same way as GCC does.
|
|
GDB now parses 0b101010 identically with 42.
|
|
|
|
* New options
|
|
|
|
set follow-exec-mode new|same
|
|
show follow-exec-mode
|
|
Control whether GDB reuses the same inferior across an exec call or
|
|
creates a new one. This is useful to be able to restart the old
|
|
executable after the inferior having done an exec call.
|
|
|
|
set default-collect EXPR, ...
|
|
show default-collect
|
|
Define a list of expressions to be collected at each tracepoint.
|
|
This is a useful way to ensure essential items are not overlooked,
|
|
such as registers or a critical global variable.
|
|
|
|
set disconnected-tracing
|
|
show disconnected-tracing
|
|
If set to 1, the target is instructed to continue tracing if it
|
|
loses its connection to GDB. If 0, the target is to stop tracing
|
|
upon disconnection.
|
|
|
|
set circular-trace-buffer
|
|
show circular-trace-buffer
|
|
If set to on, the target is instructed to use a circular trace buffer
|
|
and discard the oldest trace frames instead of stopping the trace due
|
|
to a full trace buffer. If set to off, the trace stops when the buffer
|
|
fills up. Some targets may not support this.
|
|
|
|
set script-extension off|soft|strict
|
|
show script-extension
|
|
If set to "off", the debugger does not perform any script language
|
|
recognition, and all sourced files are assumed to be GDB scripts.
|
|
If set to "soft" (the default), files are sourced according to
|
|
filename extension, falling back to GDB scripts if the first
|
|
evaluation failed.
|
|
If set to "strict", files are sourced according to filename extension.
|
|
|
|
set ada trust-PAD-over-XVS on|off
|
|
show ada trust-PAD-over-XVS
|
|
If off, activate a workaround against a bug in the debugging information
|
|
generated by the compiler for PAD types (see gcc/exp_dbug.ads in
|
|
the GCC sources for more information about the GNAT encoding and
|
|
PAD types in particular). It is always safe to set this option to
|
|
off, but this introduces a slight performance penalty. The default
|
|
is on.
|
|
|
|
* Python API Improvements
|
|
|
|
** GDB provides the new class gdb.LazyString. This is useful in
|
|
some pretty-printing cases. The new method gdb.Value.lazy_string
|
|
provides a simple way to create objects of this type.
|
|
|
|
** The fields returned by gdb.Type.fields now have an
|
|
`is_base_class' attribute.
|
|
|
|
** The new method gdb.Type.range returns the range of an array type.
|
|
|
|
** The new method gdb.parse_and_eval can be used to parse and
|
|
evaluate an expression.
|
|
|
|
* New remote packets
|
|
|
|
QTDV
|
|
Define a trace state variable.
|
|
|
|
qTV
|
|
Get the current value of a trace state variable.
|
|
|
|
QTDisconnected
|
|
Set desired tracing behavior upon disconnection.
|
|
|
|
QTBuffer:circular
|
|
Set the trace buffer to be linear or circular.
|
|
|
|
qTfP, qTsP
|
|
Get data about the tracepoints currently in use.
|
|
|
|
* Bug fixes
|
|
|
|
Process record now works correctly with hardware watchpoints.
|
|
|
|
Multiple bug fixes have been made to the mips-irix port, making it
|
|
much more reliable. In particular:
|
|
- Debugging threaded applications is now possible again. Previously,
|
|
GDB would hang while starting the program, or while waiting for
|
|
the program to stop at a breakpoint.
|
|
- Attaching to a running process no longer hangs.
|
|
- An error occurring while loading a core file has been fixed.
|
|
- Changing the value of the PC register now works again. This fixes
|
|
problems observed when using the "jump" command, or when calling
|
|
a function from GDB, or even when assigning a new value to $pc.
|
|
- With the "finish" and "return" commands, the return value for functions
|
|
returning a small array is now correctly printed.
|
|
- It is now possible to break on shared library code which gets executed
|
|
during a shared library init phase (code executed while executing
|
|
their .init section). Previously, the breakpoint would have no effect.
|
|
- GDB is now able to backtrace through the signal handler for
|
|
non-threaded programs.
|
|
|
|
PIE (Position Independent Executable) programs debugging is now supported.
|
|
This includes debugging execution of PIC (Position Independent Code) shared
|
|
libraries although for that, it should be possible to run such libraries as an
|
|
executable program.
|
|
|
|
*** Changes in GDB 7.0
|
|
|
|
* GDB now has an interface for JIT compilation. Applications that
|
|
dynamically generate code can create symbol files in memory and register
|
|
them with GDB. For users, the feature should work transparently, and
|
|
for JIT developers, the interface is documented in the GDB manual in the
|
|
"JIT Compilation Interface" chapter.
|
|
|
|
* Tracepoints may now be conditional. The syntax is as for
|
|
breakpoints; either an "if" clause appended to the "trace" command,
|
|
or the "condition" command is available. GDB sends the condition to
|
|
the target for evaluation using the same bytecode format as is used
|
|
for tracepoint actions.
|
|
|
|
* The disassemble command now supports: an optional /r modifier, print the
|
|
raw instructions in hex as well as in symbolic form, and an optional /m
|
|
modifier to print mixed source+assembly.
|
|
|
|
* Process record and replay
|
|
|
|
In a architecture environment that supports ``process record and
|
|
replay'', ``process record and replay'' target can record a log of
|
|
the process execution, and replay it with both forward and reverse
|
|
execute commands.
|
|
|
|
* Reverse debugging: GDB now has new commands reverse-continue, reverse-
|
|
step, reverse-next, reverse-finish, reverse-stepi, reverse-nexti, and
|
|
set execution-direction {forward|reverse}, for targets that support
|
|
reverse execution.
|
|
|
|
* GDB now supports hardware watchpoints on MIPS/Linux systems. This
|
|
feature is available with a native GDB running on kernel version
|
|
2.6.28 or later.
|
|
|
|
* GDB now has support for multi-byte and wide character sets on the
|
|
target. Strings whose character type is wchar_t, char16_t, or
|
|
char32_t are now correctly printed. GDB supports wide- and unicode-
|
|
literals in C, that is, L'x', L"string", u'x', u"string", U'x', and
|
|
U"string" syntax. And, GDB allows the "%ls" and "%lc" formats in
|
|
`printf'. This feature requires iconv to work properly; if your
|
|
system does not have a working iconv, GDB can use GNU libiconv. See
|
|
the installation instructions for more information.
|
|
|
|
* GDB now supports automatic retrieval of shared library files from
|
|
remote targets. To use this feature, specify a system root that begins
|
|
with the `remote:' prefix, either via the `set sysroot' command or via
|
|
the `--with-sysroot' configure-time option.
|
|
|
|
* "info sharedlibrary" now takes an optional regex of libraries to show,
|
|
and it now reports if a shared library has no debugging information.
|
|
|
|
* Commands `set debug-file-directory', `set solib-search-path' and `set args'
|
|
now complete on file names.
|
|
|
|
* When completing in expressions, gdb will attempt to limit
|
|
completions to allowable structure or union fields, where appropriate.
|
|
For instance, consider:
|
|
|
|
# struct example { int f1; double f2; };
|
|
# struct example variable;
|
|
(gdb) p variable.
|
|
|
|
If the user types TAB at the end of this command line, the available
|
|
completions will be "f1" and "f2".
|
|
|
|
* Inlined functions are now supported. They show up in backtraces, and
|
|
the "step", "next", and "finish" commands handle them automatically.
|
|
|
|
* GDB now supports the token-splicing (##) and stringification (#)
|
|
operators when expanding macros. It also supports variable-arity
|
|
macros.
|
|
|
|
* GDB now supports inspecting extra signal information, exported by
|
|
the new $_siginfo convenience variable. The feature is currently
|
|
implemented on linux ARM, i386 and amd64.
|
|
|
|
* GDB can now display the VFP floating point registers and NEON vector
|
|
registers on ARM targets. Both ARM GNU/Linux native GDB and gdbserver
|
|
can provide these registers (requires Linux 2.6.30 or later). Remote
|
|
and simulator targets may also provide them.
|
|
|
|
* New remote packets
|
|
|
|
qSearch:memory:
|
|
Search memory for a sequence of bytes.
|
|
|
|
QStartNoAckMode
|
|
Turn off `+'/`-' protocol acknowledgments to permit more efficient
|
|
operation over reliable transport links. Use of this packet is
|
|
controlled by the `set remote noack-packet' command.
|
|
|
|
vKill
|
|
Kill the process with the specified process ID. Use this in preference
|
|
to `k' when multiprocess protocol extensions are supported.
|
|
|
|
qXfer:osdata:read
|
|
Obtains additional operating system information
|
|
|
|
qXfer:siginfo:read
|
|
qXfer:siginfo:write
|
|
Read or write additional signal information.
|
|
|
|
* Removed remote protocol undocumented extension
|
|
|
|
An undocumented extension to the remote protocol's `S' stop reply
|
|
packet that permited the stub to pass a process id was removed.
|
|
Remote servers should use the `T' stop reply packet instead.
|
|
|
|
* GDB now supports multiple function calling conventions according to the
|
|
DWARF-2 DW_AT_calling_convention function attribute.
|
|
|
|
* The SH target utilizes the aforementioned change to distinguish between gcc
|
|
and Renesas calling convention. It also adds the new CLI commands
|
|
`set/show sh calling-convention'.
|
|
|
|
* GDB can now read compressed debug sections, as produced by GNU gold
|
|
with the --compress-debug-sections=zlib flag.
|
|
|
|
* 64-bit core files are now supported on AIX.
|
|
|
|
* Thread switching is now supported on Tru64.
|
|
|
|
* Watchpoints can now be set on unreadable memory locations, e.g. addresses
|
|
which will be allocated using malloc later in program execution.
|
|
|
|
* The qXfer:libraries:read remote procotol packet now allows passing a
|
|
list of section offsets.
|
|
|
|
* On GNU/Linux, GDB can now attach to stopped processes. Several race
|
|
conditions handling signals delivered during attach or thread creation
|
|
have also been fixed.
|
|
|
|
* GDB now supports the use of DWARF boolean types for Ada's type Boolean.
|
|
From the user's standpoint, all unqualified instances of True and False
|
|
are treated as the standard definitions, regardless of context.
|
|
|
|
* GDB now parses C++ symbol and type names more flexibly. For
|
|
example, given:
|
|
|
|
template<typename T> class C { };
|
|
C<char const *> c;
|
|
|
|
GDB will now correctly handle all of:
|
|
|
|
ptype C<char const *>
|
|
ptype C<char const*>
|
|
ptype C<const char *>
|
|
ptype C<const char*>
|
|
|
|
* New features in the GDB remote stub, gdbserver
|
|
|
|
- The "--wrapper" command-line argument tells gdbserver to use a
|
|
wrapper program to launch programs for debugging.
|
|
|
|
- On PowerPC and S/390 targets, it is now possible to use a single
|
|
gdbserver executable to debug both 32-bit and 64-bit programs.
|
|
(This requires gdbserver itself to be built as a 64-bit executable.)
|
|
|
|
- gdbserver uses the new noack protocol mode for TCP connections to
|
|
reduce communications latency, if also supported and enabled in GDB.
|
|
|
|
- Support for the sparc64-linux-gnu target is now included in
|
|
gdbserver.
|
|
|
|
- The amd64-linux build of gdbserver now supports debugging both
|
|
32-bit and 64-bit programs.
|
|
|
|
- The i386-linux, amd64-linux, and i386-win32 builds of gdbserver
|
|
now support hardware watchpoints, and will use them automatically
|
|
as appropriate.
|
|
|
|
* Python scripting
|
|
|
|
GDB now has support for scripting using Python. Whether this is
|
|
available is determined at configure time.
|
|
|
|
New GDB commands can now be written in Python.
|
|
|
|
* Ada tasking support
|
|
|
|
Ada tasks can now be inspected in GDB. The following commands have
|
|
been introduced:
|
|
|
|
info tasks
|
|
Print the list of Ada tasks.
|
|
info task N
|
|
Print detailed information about task number N.
|
|
task
|
|
Print the task number of the current task.
|
|
task N
|
|
Switch the context of debugging to task number N.
|
|
|
|
* Support for user-defined prefixed commands. The "define" command can
|
|
add new commands to existing prefixes, e.g. "target".
|
|
|
|
* Multi-inferior, multi-process debugging.
|
|
|
|
GDB now has generalized support for multi-inferior debugging. See
|
|
"Debugging Multiple Inferiors" in the manual for more information.
|
|
Although availability still depends on target support, the command
|
|
set is more uniform now. The GNU/Linux specific multi-forks support
|
|
has been migrated to this new framework. This implied some user
|
|
visible changes; see "New commands" and also "Removed commands"
|
|
below.
|
|
|
|
* Target descriptions can now describe the target OS ABI. See the
|
|
"Target Description Format" section in the user manual for more
|
|
information.
|
|
|
|
* Target descriptions can now describe "compatible" architectures
|
|
to indicate that the target can execute applications for a different
|
|
architecture in addition to those for the main target architecture.
|
|
See the "Target Description Format" section in the user manual for
|
|
more information.
|
|
|
|
* Multi-architecture debugging.
|
|
|
|
GDB now includes general supports for debugging applications on
|
|
hybrid systems that use more than one single processor architecture
|
|
at the same time. Each such hybrid architecture still requires
|
|
specific support to be added. The only hybrid architecture supported
|
|
in this version of GDB is the Cell Broadband Engine.
|
|
|
|
* GDB now supports integrated debugging of Cell/B.E. applications that
|
|
use both the PPU and SPU architectures. To enable support for hybrid
|
|
Cell/B.E. debugging, you need to configure GDB to support both the
|
|
powerpc-linux or powerpc64-linux and the spu-elf targets, using the
|
|
--enable-targets configure option.
|
|
|
|
* Non-stop mode debugging.
|
|
|
|
For some targets, GDB now supports an optional mode of operation in
|
|
which you can examine stopped threads while other threads continue
|
|
to execute freely. This is referred to as non-stop mode, with the
|
|
old mode referred to as all-stop mode. See the "Non-Stop Mode"
|
|
section in the user manual for more information.
|
|
|
|
To be able to support remote non-stop debugging, a remote stub needs
|
|
to implement the non-stop mode remote protocol extensions, as
|
|
described in the "Remote Non-Stop" section of the user manual. The
|
|
GDB remote stub, gdbserver, has been adjusted to support these
|
|
extensions on linux targets.
|
|
|
|
* New commands (for set/show, see "New options" below)
|
|
|
|
catch syscall [NAME(S) | NUMBER(S)]
|
|
Catch system calls. Arguments, which should be names of system
|
|
calls or their numbers, mean catch only those syscalls. Without
|
|
arguments, every syscall will be caught. When the inferior issues
|
|
any of the specified syscalls, GDB will stop and announce the system
|
|
call, both when it is called and when its call returns. This
|
|
feature is currently available with a native GDB running on the
|
|
Linux Kernel, under the following architectures: x86, x86_64,
|
|
PowerPC and PowerPC64.
|
|
|
|
find [/size-char] [/max-count] start-address, end-address|+search-space-size,
|
|
val1 [, val2, ...]
|
|
Search memory for a sequence of bytes.
|
|
|
|
maint set python print-stack
|
|
maint show python print-stack
|
|
Show a stack trace when an error is encountered in a Python script.
|
|
|
|
python [CODE]
|
|
Invoke CODE by passing it to the Python interpreter.
|
|
|
|
macro define
|
|
macro list
|
|
macro undef
|
|
These allow macros to be defined, undefined, and listed
|
|
interactively.
|
|
|
|
info os processes
|
|
Show operating system information about processes.
|
|
|
|
info inferiors
|
|
List the inferiors currently under GDB's control.
|
|
|
|
inferior NUM
|
|
Switch focus to inferior number NUM.
|
|
|
|
detach inferior NUM
|
|
Detach from inferior number NUM.
|
|
|
|
kill inferior NUM
|
|
Kill inferior number NUM.
|
|
|
|
* New options
|
|
|
|
set spu stop-on-load
|
|
show spu stop-on-load
|
|
Control whether to stop for new SPE threads during Cell/B.E. debugging.
|
|
|
|
set spu auto-flush-cache
|
|
show spu auto-flush-cache
|
|
Control whether to automatically flush the software-managed cache
|
|
during Cell/B.E. debugging.
|
|
|
|
set sh calling-convention
|
|
show sh calling-convention
|
|
Control the calling convention used when calling SH target functions.
|
|
|
|
set debug timestamp
|
|
show debug timestamp
|
|
Control display of timestamps with GDB debugging output.
|
|
|
|
set disassemble-next-line
|
|
show disassemble-next-line
|
|
Control display of disassembled source lines or instructions when
|
|
the debuggee stops.
|
|
|
|
set remote noack-packet
|
|
show remote noack-packet
|
|
Set/show the use of remote protocol QStartNoAckMode packet. See above
|
|
under "New remote packets."
|
|
|
|
set remote query-attached-packet
|
|
show remote query-attached-packet
|
|
Control use of remote protocol `qAttached' (query-attached) packet.
|
|
|
|
set remote read-siginfo-object
|
|
show remote read-siginfo-object
|
|
Control use of remote protocol `qXfer:siginfo:read' (read-siginfo-object)
|
|
packet.
|
|
|
|
set remote write-siginfo-object
|
|
show remote write-siginfo-object
|
|
Control use of remote protocol `qXfer:siginfo:write' (write-siginfo-object)
|
|
packet.
|
|
|
|
set remote reverse-continue
|
|
show remote reverse-continue
|
|
Control use of remote protocol 'bc' (reverse-continue) packet.
|
|
|
|
set remote reverse-step
|
|
show remote reverse-step
|
|
Control use of remote protocol 'bs' (reverse-step) packet.
|
|
|
|
set displaced-stepping
|
|
show displaced-stepping
|
|
Control displaced stepping mode. Displaced stepping is a way to
|
|
single-step over breakpoints without removing them from the debuggee.
|
|
Also known as "out-of-line single-stepping".
|
|
|
|
set debug displaced
|
|
show debug displaced
|
|
Control display of debugging info for displaced stepping.
|
|
|
|
maint set internal-error
|
|
maint show internal-error
|
|
Control what GDB does when an internal error is detected.
|
|
|
|
maint set internal-warning
|
|
maint show internal-warning
|
|
Control what GDB does when an internal warning is detected.
|
|
|
|
set exec-wrapper
|
|
show exec-wrapper
|
|
unset exec-wrapper
|
|
Use a wrapper program to launch programs for debugging.
|
|
|
|
set multiple-symbols (all|ask|cancel)
|
|
show multiple-symbols
|
|
The value of this variable can be changed to adjust the debugger behavior
|
|
when an expression or a breakpoint location contains an ambiguous symbol
|
|
name (an overloaded function name, for instance).
|
|
|
|
set breakpoint always-inserted
|
|
show breakpoint always-inserted
|
|
Keep breakpoints always inserted in the target, as opposed to inserting
|
|
them when resuming the target, and removing them when the target stops.
|
|
This option can improve debugger performance on slow remote targets.
|
|
|
|
set arm fallback-mode (arm|thumb|auto)
|
|
show arm fallback-mode
|
|
set arm force-mode (arm|thumb|auto)
|
|
show arm force-mode
|
|
These commands control how ARM GDB determines whether instructions
|
|
are ARM or Thumb. The default for both settings is auto, which uses
|
|
the current CPSR value for instructions without symbols; previous
|
|
versions of GDB behaved as if "set arm fallback-mode arm".
|
|
|
|
set disable-randomization
|
|
show disable-randomization
|
|
Standalone programs run with the virtual address space randomization enabled
|
|
by default on some platforms. This option keeps the addresses stable across
|
|
multiple debugging sessions.
|
|
|
|
set non-stop
|
|
show non-stop
|
|
Control whether other threads are stopped or not when some thread hits
|
|
a breakpoint.
|
|
|
|
set target-async
|
|
show target-async
|
|
Requests that asynchronous execution is enabled in the target, if available.
|
|
In this case, it's possible to resume target in the background, and interact
|
|
with GDB while the target is running. "show target-async" displays the
|
|
current state of asynchronous execution of the target.
|
|
|
|
set target-wide-charset
|
|
show target-wide-charset
|
|
The target-wide-charset is the name of the character set that GDB
|
|
uses when printing characters whose type is wchar_t.
|
|
|
|
set tcp auto-retry (on|off)
|
|
show tcp auto-retry
|
|
set tcp connect-timeout
|
|
show tcp connect-timeout
|
|
These commands allow GDB to retry failed TCP connections to a remote stub
|
|
with a specified timeout period; this is useful if the stub is launched
|
|
in parallel with GDB but may not be ready to accept connections immediately.
|
|
|
|
set libthread-db-search-path
|
|
show libthread-db-search-path
|
|
Control list of directories which GDB will search for appropriate
|
|
libthread_db.
|
|
|
|
set schedule-multiple (on|off)
|
|
show schedule-multiple
|
|
Allow GDB to resume all threads of all processes or only threads of
|
|
the current process.
|
|
|
|
set stack-cache
|
|
show stack-cache
|
|
Use more aggressive caching for accesses to the stack. This improves
|
|
performance of remote debugging (particularly backtraces) without
|
|
affecting correctness.
|
|
|
|
set interactive-mode (on|off|auto)
|
|
show interactive-mode
|
|
Control whether GDB runs in interactive mode (on) or not (off).
|
|
When in interactive mode, GDB waits for the user to answer all
|
|
queries. Otherwise, GDB does not wait and assumes the default
|
|
answer. When set to auto (the default), GDB determines which
|
|
mode to use based on the stdin settings.
|
|
|
|
* Removed commands
|
|
|
|
info forks
|
|
For program forks, this is replaced by the new more generic `info
|
|
inferiors' command. To list checkpoints, you can still use the
|
|
`info checkpoints' command, which was an alias for the `info forks'
|
|
command.
|
|
|
|
fork NUM
|
|
Replaced by the new `inferior' command. To switch between
|
|
checkpoints, you can still use the `restart' command, which was an
|
|
alias for the `fork' command.
|
|
|
|
process PID
|
|
This is removed, since some targets don't have a notion of
|
|
processes. To switch between processes, you can still use the
|
|
`inferior' command using GDB's own inferior number.
|
|
|
|
delete fork NUM
|
|
For program forks, this is replaced by the new more generic `kill
|
|
inferior' command. To delete a checkpoint, you can still use the
|
|
`delete checkpoint' command, which was an alias for the `delete
|
|
fork' command.
|
|
|
|
detach fork NUM
|
|
For program forks, this is replaced by the new more generic `detach
|
|
inferior' command. To detach a checkpoint, you can still use the
|
|
`detach checkpoint' command, which was an alias for the `detach
|
|
fork' command.
|
|
|
|
* New native configurations
|
|
|
|
x86/x86_64 Darwin i[34567]86-*-darwin*
|
|
|
|
x86_64 MinGW x86_64-*-mingw*
|
|
|
|
* New targets
|
|
|
|
Lattice Mico32 lm32-*
|
|
x86 DICOS i[34567]86-*-dicos*
|
|
x86_64 DICOS x86_64-*-dicos*
|
|
S+core 3 score-*-*
|
|
|
|
* The GDB remote stub, gdbserver, now supports x86 Windows CE
|
|
(mingw32ce) debugging.
|
|
|
|
* Removed commands
|
|
|
|
catch load
|
|
catch unload
|
|
These commands were actually not implemented on any target.
|
|
|
|
*** Changes in GDB 6.8
|
|
|
|
* New native configurations
|
|
|
|
NetBSD/hppa hppa*-*netbsd*
|
|
Xtensa GNU/Linux xtensa*-*-linux*
|
|
|
|
* New targets
|
|
|
|
NetBSD/hppa hppa*-*-netbsd*
|
|
Xtensa GNU/Lunux xtensa*-*-linux*
|
|
|
|
* Change in command line behavior -- corefiles vs. process ids.
|
|
|
|
When the '-p NUMBER' or '--pid NUMBER' options are used, and
|
|
attaching to process NUMBER fails, GDB no longer attempts to open a
|
|
core file named NUMBER. Attaching to a program using the -c option
|
|
is no longer supported. Instead, use the '-p' or '--pid' options.
|
|
|
|
* GDB can now be built as a native debugger for debugging Windows x86
|
|
(mingw32) Portable Executable (PE) programs.
|
|
|
|
* Pending breakpoints no longer change their number when their address
|
|
is resolved.
|
|
|
|
* GDB now supports breakpoints with multiple locations,
|
|
including breakpoints on C++ constructors, inside C++ templates,
|
|
and in inlined functions.
|
|
|
|
* GDB's ability to debug optimized code has been improved. GDB more
|
|
accurately identifies function bodies and lexical blocks that occupy
|
|
more than one contiguous range of addresses.
|
|
|
|
* Target descriptions can now describe registers for PowerPC.
|
|
|
|
* The GDB remote stub, gdbserver, now supports the AltiVec and SPE
|
|
registers on PowerPC targets.
|
|
|
|
* The GDB remote stub, gdbserver, now supports thread debugging on GNU/Linux
|
|
targets even when the libthread_db library is not available.
|
|
|
|
* The GDB remote stub, gdbserver, now supports the new file transfer
|
|
commands (remote put, remote get, and remote delete).
|
|
|
|
* The GDB remote stub, gdbserver, now supports run and attach in
|
|
extended-remote mode.
|
|
|
|
* hppa*64*-*-hpux11* target broken
|
|
The debugger is unable to start a program and fails with the following
|
|
error: "Error trying to get information about dynamic linker".
|
|
The gdb-6.7 release is also affected.
|
|
|
|
* GDB now supports the --enable-targets= configure option to allow
|
|
building a single GDB executable that supports multiple remote
|
|
target architectures.
|
|
|
|
* GDB now supports debugging C and C++ programs which use the
|
|
Decimal Floating Point extension. In addition, the PowerPC target
|
|
now has a set of pseudo-registers to inspect decimal float values
|
|
stored in two consecutive float registers.
|
|
|
|
* The -break-insert MI command can optionally create pending
|
|
breakpoints now.
|
|
|
|
* Improved support for debugging Ada
|
|
Many improvements to the Ada language support have been made. These
|
|
include:
|
|
- Better support for Ada2005 interface types
|
|
- Improved handling of arrays and slices in general
|
|
- Better support for Taft-amendment types
|
|
- The '{type} ADDRESS' expression is now allowed on the left hand-side
|
|
of an assignment
|
|
- Improved command completion in Ada
|
|
- Several bug fixes
|
|
|
|
* GDB on GNU/Linux and HP/UX can now debug through "exec" of a new
|
|
process.
|
|
|
|
* New commands
|
|
|
|
set print frame-arguments (all|scalars|none)
|
|
show print frame-arguments
|
|
The value of this variable can be changed to control which argument
|
|
values should be printed by the debugger when displaying a frame.
|
|
|
|
remote put
|
|
remote get
|
|
remote delete
|
|
Transfer files to and from a remote target, and delete remote files.
|
|
|
|
* New MI commands
|
|
|
|
-target-file-put
|
|
-target-file-get
|
|
-target-file-delete
|
|
Transfer files to and from a remote target, and delete remote files.
|
|
|
|
* New remote packets
|
|
|
|
vFile:open:
|
|
vFile:close:
|
|
vFile:pread:
|
|
vFile:pwrite:
|
|
vFile:unlink:
|
|
Open, close, read, write, and delete files on the remote system.
|
|
|
|
vAttach
|
|
Attach to an existing process on the remote system, in extended-remote
|
|
mode.
|
|
|
|
vRun
|
|
Run a new process on the remote system, in extended-remote mode.
|
|
|
|
*** Changes in GDB 6.7
|
|
|
|
* Resolved 101 resource leaks, null pointer dereferences, etc. in gdb,
|
|
bfd, libiberty and opcodes, as revealed by static analysis donated by
|
|
Coverity, Inc. (http://scan.coverity.com).
|
|
|
|
* When looking up multiply-defined global symbols, GDB will now prefer the
|
|
symbol definition in the current shared library if it was built using the
|
|
-Bsymbolic linker option.
|
|
|
|
* When the Text User Interface (TUI) is not configured, GDB will now
|
|
recognize the -tui command-line option and print a message that the TUI
|
|
is not supported.
|
|
|
|
* The GDB remote stub, gdbserver, now has lower overhead for high
|
|
frequency signals (e.g. SIGALRM) via the QPassSignals packet.
|
|
|
|
* GDB for MIPS targets now autodetects whether a remote target provides
|
|
32-bit or 64-bit register values.
|
|
|
|
* Support for C++ member pointers has been improved.
|
|
|
|
* GDB now understands XML target descriptions, which specify the
|
|
target's overall architecture. GDB can read a description from
|
|
a local file or over the remote serial protocol.
|
|
|
|
* Vectors of single-byte data use a new integer type which is not
|
|
automatically displayed as character or string data.
|
|
|
|
* The /s format now works with the print command. It displays
|
|
arrays of single-byte integers and pointers to single-byte integers
|
|
as strings.
|
|
|
|
* Target descriptions can now describe target-specific registers,
|
|
for architectures which have implemented the support (currently
|
|
only ARM, M68K, and MIPS).
|
|
|
|
* GDB and the GDB remote stub, gdbserver, now support the XScale
|
|
iWMMXt coprocessor.
|
|
|
|
* The GDB remote stub, gdbserver, has been updated to support
|
|
ARM Windows CE (mingw32ce) debugging, and GDB Windows CE support
|
|
has been rewritten to use the standard GDB remote protocol.
|
|
|
|
* GDB can now step into C++ functions which are called through thunks.
|
|
|
|
* GDB for the Cell/B.E. SPU now supports overlay debugging.
|
|
|
|
* The GDB remote protocol "qOffsets" packet can now honor ELF segment
|
|
layout. It also supports a TextSeg= and DataSeg= response when only
|
|
segment base addresses (rather than offsets) are available.
|
|
|
|
* The /i format now outputs any trailing branch delay slot instructions
|
|
immediately following the last instruction within the count specified.
|
|
|
|
* The GDB remote protocol "T" stop reply packet now supports a
|
|
"library" response. Combined with the new "qXfer:libraries:read"
|
|
packet, this response allows GDB to debug shared libraries on targets
|
|
where the operating system manages the list of loaded libraries (e.g.
|
|
Windows and SymbianOS).
|
|
|
|
* The GDB remote stub, gdbserver, now supports dynamic link libraries
|
|
(DLLs) on Windows and Windows CE targets.
|
|
|
|
* GDB now supports a faster verification that a .debug file matches its binary
|
|
according to its build-id signature, if the signature is present.
|
|
|
|
* New commands
|
|
|
|
set remoteflow
|
|
show remoteflow
|
|
Enable or disable hardware flow control (RTS/CTS) on the serial port
|
|
when debugging using remote targets.
|
|
|
|
set mem inaccessible-by-default
|
|
show mem inaccessible-by-default
|
|
If the target supplies a memory map, for instance via the remote
|
|
protocol's "qXfer:memory-map:read" packet, setting this variable
|
|
prevents GDB from accessing memory outside the memory map. This
|
|
is useful for targets with memory mapped registers or which react
|
|
badly to accesses of unmapped address space.
|
|
|
|
set breakpoint auto-hw
|
|
show breakpoint auto-hw
|
|
If the target supplies a memory map, for instance via the remote
|
|
protocol's "qXfer:memory-map:read" packet, setting this variable
|
|
lets GDB use hardware breakpoints automatically for memory regions
|
|
where it can not use software breakpoints. This covers both the
|
|
"break" command and internal breakpoints used for other commands
|
|
including "next" and "finish".
|
|
|
|
catch exception
|
|
catch exception unhandled
|
|
Stop the program execution when Ada exceptions are raised.
|
|
|
|
catch assert
|
|
Stop the program execution when an Ada assertion failed.
|
|
|
|
set sysroot
|
|
show sysroot
|
|
Set an alternate system root for target files. This is a more
|
|
general version of "set solib-absolute-prefix", which is now
|
|
an alias to "set sysroot".
|
|
|
|
info spu
|
|
Provide extended SPU facility status information. This set of
|
|
commands is available only when debugging the Cell/B.E. SPU
|
|
architecture.
|
|
|
|
* New native configurations
|
|
|
|
OpenBSD/sh sh*-*openbsd*
|
|
|
|
set tdesc filename
|
|
unset tdesc filename
|
|
show tdesc filename
|
|
Use the specified local file as an XML target description, and do
|
|
not query the target for its built-in description.
|
|
|
|
* New targets
|
|
|
|
OpenBSD/sh sh*-*-openbsd*
|
|
MIPS64 GNU/Linux (gdbserver) mips64-linux-gnu
|
|
Toshiba Media Processor mep-elf
|
|
|
|
* New remote packets
|
|
|
|
QPassSignals:
|
|
Ignore the specified signals; pass them directly to the debugged program
|
|
without stopping other threads or reporting them to GDB.
|
|
|
|
qXfer:features:read:
|
|
Read an XML target description from the target, which describes its
|
|
features.
|
|
|
|
qXfer:spu:read:
|
|
qXfer:spu:write:
|
|
Read or write contents of an spufs file on the target system. These
|
|
packets are available only on the Cell/B.E. SPU architecture.
|
|
|
|
qXfer:libraries:read:
|
|
Report the loaded shared libraries. Combined with new "T" packet
|
|
response, this packet allows GDB to debug shared libraries on
|
|
targets where the operating system manages the list of loaded
|
|
libraries (e.g. Windows and SymbianOS).
|
|
|
|
* Removed targets
|
|
|
|
Support for these obsolete configurations has been removed.
|
|
|
|
alpha*-*-osf1*
|
|
alpha*-*-osf2*
|
|
d10v-*-*
|
|
hppa*-*-hiux*
|
|
i[34567]86-ncr-*
|
|
i[34567]86-*-dgux*
|
|
i[34567]86-*-lynxos*
|
|
i[34567]86-*-netware*
|
|
i[34567]86-*-sco3.2v5*
|
|
i[34567]86-*-sco3.2v4*
|
|
i[34567]86-*-sco*
|
|
i[34567]86-*-sysv4.2*
|
|
i[34567]86-*-sysv4*
|
|
i[34567]86-*-sysv5*
|
|
i[34567]86-*-unixware2*
|
|
i[34567]86-*-unixware*
|
|
i[34567]86-*-sysv*
|
|
i[34567]86-*-isc*
|
|
m68*-cisco*-*
|
|
m68*-tandem-*
|
|
mips*-*-pe
|
|
rs6000-*-lynxos*
|
|
sh*-*-pe
|
|
|
|
* Other removed features
|
|
|
|
target abug
|
|
target cpu32bug
|
|
target est
|
|
target rom68k
|
|
|
|
Various m68k-only ROM monitors.
|
|
|
|
target hms
|
|
target e7000
|
|
target sh3
|
|
target sh3e
|
|
|
|
Various Renesas ROM monitors and debugging interfaces for SH and
|
|
H8/300.
|
|
|
|
target ocd
|
|
|
|
Support for a Macraigor serial interface to on-chip debugging.
|
|
GDB does not directly support the newer parallel or USB
|
|
interfaces.
|
|
|
|
DWARF 1 support
|
|
|
|
A debug information format. The predecessor to DWARF 2 and
|
|
DWARF 3, which are still supported.
|
|
|
|
Support for the HP aCC compiler on HP-UX/PA-RISC
|
|
|
|
SOM-encapsulated symbolic debugging information, automatic
|
|
invocation of pxdb, and the aCC custom C++ ABI. This does not
|
|
affect HP-UX for Itanium or GCC for HP-UX/PA-RISC. Code compiled
|
|
with aCC can still be debugged on an assembly level.
|
|
|
|
MIPS ".pdr" sections
|
|
|
|
A MIPS-specific format used to describe stack frame layout
|
|
in debugging information.
|
|
|
|
Scheme support
|
|
|
|
GDB could work with an older version of Guile to debug
|
|
the interpreter and Scheme programs running in it.
|
|
|
|
set mips stack-arg-size
|
|
set mips saved-gpreg-size
|
|
|
|
Use "set mips abi" to control parameter passing for MIPS.
|
|
|
|
*** Changes in GDB 6.6
|
|
|
|
* New targets
|
|
|
|
Xtensa xtensa-elf
|
|
Cell Broadband Engine SPU spu-elf
|
|
|
|
* GDB can now be configured as a cross-debugger targeting native Windows
|
|
(mingw32) or Cygwin. It can communicate with a remote debugging stub
|
|
running on a Windows system over TCP/IP to debug Windows programs.
|
|
|
|
* The GDB remote stub, gdbserver, has been updated to support Windows and
|
|
Cygwin debugging. Both single-threaded and multi-threaded programs are
|
|
supported.
|
|
|
|
* The "set trust-readonly-sections" command works again. This command was
|
|
broken in GDB 6.3, 6.4, and 6.5.
|
|
|
|
* The "load" command now supports writing to flash memory, if the remote
|
|
stub provides the required support.
|
|
|
|
* Support for GNU/Linux Thread Local Storage (TLS, per-thread variables) no
|
|
longer requires symbolic debug information (e.g. DWARF-2).
|
|
|
|
* New commands
|
|
|
|
set substitute-path
|
|
unset substitute-path
|
|
show substitute-path
|
|
Manage a list of substitution rules that GDB uses to rewrite the name
|
|
of the directories where the sources are located. This can be useful
|
|
for instance when the sources were moved to a different location
|
|
between compilation and debugging.
|
|
|
|
set trace-commands
|
|
show trace-commands
|
|
Print each CLI command as it is executed. Each command is prefixed with
|
|
a number of `+' symbols representing the nesting depth.
|
|
The source command now has a `-v' option to enable the same feature.
|
|
|
|
* REMOVED features
|
|
|
|
The ARM Demon monitor support (RDP protocol, "target rdp").
|
|
|
|
Kernel Object Display, an embedded debugging feature which only worked with
|
|
an obsolete version of Cisco IOS.
|
|
|
|
The 'set download-write-size' and 'show download-write-size' commands.
|
|
|
|
* New remote packets
|
|
|
|
qSupported:
|
|
Tell a stub about GDB client features, and request remote target features.
|
|
The first feature implemented is PacketSize, which allows the target to
|
|
specify the size of packets it can handle - to minimize the number of
|
|
packets required and improve performance when connected to a remote
|
|
target.
|
|
|
|
qXfer:auxv:read:
|
|
Fetch an OS auxilliary vector from the remote stub. This packet is a
|
|
more efficient replacement for qPart:auxv:read.
|
|
|
|
qXfer:memory-map:read:
|
|
Fetch a memory map from the remote stub, including information about
|
|
RAM, ROM, and flash memory devices.
|
|
|
|
vFlashErase:
|
|
vFlashWrite:
|
|
vFlashDone:
|
|
Erase and program a flash memory device.
|
|
|
|
* Removed remote packets
|
|
|
|
qPart:auxv:read:
|
|
This packet has been replaced by qXfer:auxv:read. Only GDB 6.4 and 6.5
|
|
used it, and only gdbserver implemented it.
|
|
|
|
*** Changes in GDB 6.5
|
|
|
|
* New targets
|
|
|
|
Renesas M32C/M16C m32c-elf
|
|
|
|
Morpho Technologies ms1 ms1-elf
|
|
|
|
* New commands
|
|
|
|
init-if-undefined Initialize a convenience variable, but
|
|
only if it doesn't already have a value.
|
|
|
|
The following commands are presently only implemented for native GNU/Linux:
|
|
|
|
checkpoint Save a snapshot of the program state.
|
|
|
|
restart <n> Return the program state to a
|
|
previously saved state.
|
|
|
|
info checkpoints List currently saved checkpoints.
|
|
|
|
delete-checkpoint <n> Delete a previously saved checkpoint.
|
|
|
|
set|show detach-on-fork Tell gdb whether to detach from a newly
|
|
forked process, or to keep debugging it.
|
|
|
|
info forks List forks of the user program that
|
|
are available to be debugged.
|
|
|
|
fork <n> Switch to debugging one of several
|
|
forks of the user program that are
|
|
available to be debugged.
|
|
|
|
delete-fork <n> Delete a fork from the list of forks
|
|
that are available to be debugged (and
|
|
kill the forked process).
|
|
|
|
detach-fork <n> Delete a fork from the list of forks
|
|
that are available to be debugged (and
|
|
allow the process to continue).
|
|
|
|
* New architecture
|
|
|
|
Morpho Technologies ms2 ms1-elf
|
|
|
|
* Improved Windows host support
|
|
|
|
GDB now builds as a cross debugger hosted on i686-mingw32, including
|
|
native console support, and remote communications using either
|
|
network sockets or serial ports.
|
|
|
|
* Improved Modula-2 language support
|
|
|
|
GDB can now print most types in the Modula-2 syntax. This includes:
|
|
basic types, set types, record types, enumerated types, range types,
|
|
pointer types and ARRAY types. Procedure var parameters are correctly
|
|
printed and hexadecimal addresses and character constants are also
|
|
written in the Modula-2 syntax. Best results can be obtained by using
|
|
GNU Modula-2 together with the -gdwarf-2 command line option.
|
|
|
|
* REMOVED features
|
|
|
|
The ARM rdi-share module.
|
|
|
|
The Netware NLM debug server.
|
|
|
|
*** Changes in GDB 6.4
|
|
|
|
* New native configurations
|
|
|
|
OpenBSD/arm arm*-*-openbsd*
|
|
OpenBSD/mips64 mips64-*-openbsd*
|
|
|
|
* New targets
|
|
|
|
Morpho Technologies ms1 ms1-elf
|
|
|
|
* New command line options
|
|
|
|
--batch-silent As for --batch, but totally silent.
|
|
--return-child-result The debugger will exist with the same value
|
|
the child (debugged) program exited with.
|
|
--eval-command COMMAND, -ex COMMAND
|
|
Execute a single GDB CLI command. This may be
|
|
specified multiple times and in conjunction
|
|
with the --command (-x) option.
|
|
|
|
* Deprecated commands removed
|
|
|
|
The following commands, that were deprecated in 2000, have been
|
|
removed:
|
|
|
|
Command Replacement
|
|
set|show arm disassembly-flavor set|show arm disassembler
|
|
othernames set arm disassembler
|
|
set|show remotedebug set|show debug remote
|
|
set|show archdebug set|show debug arch
|
|
set|show eventdebug set|show debug event
|
|
regs info registers
|
|
|
|
* New BSD user-level threads support
|
|
|
|
It is now possible to debug programs using the user-level threads
|
|
library on OpenBSD and FreeBSD. Currently supported (target)
|
|
configurations are:
|
|
|
|
FreeBSD/amd64 x86_64-*-freebsd*
|
|
FreeBSD/i386 i386-*-freebsd*
|
|
OpenBSD/i386 i386-*-openbsd*
|
|
|
|
Note that the new kernel threads libraries introduced in FreeBSD 5.x
|
|
are not yet supported.
|
|
|
|
* New support for Matsushita MN10300 w/sim added
|
|
(Work in progress). mn10300-elf.
|
|
|
|
* REMOVED configurations and files
|
|
|
|
VxWorks and the XDR protocol *-*-vxworks
|
|
Motorola MCORE mcore-*-*
|
|
National Semiconductor NS32000 ns32k-*-*
|
|
|
|
* New "set print array-indexes" command
|
|
|
|
After turning this setting "on", GDB prints the index of each element
|
|
when displaying arrays. The default is "off" to preserve the previous
|
|
behavior.
|
|
|
|
* VAX floating point support
|
|
|
|
GDB now supports the not-quite-ieee VAX F and D floating point formats.
|
|
|
|
* User-defined command support
|
|
|
|
In addition to using $arg0..$arg9 for argument passing, it is now possible
|
|
to use $argc to determine now many arguments have been passed. See the
|
|
section on user-defined commands in the user manual for more information.
|
|
|
|
*** Changes in GDB 6.3:
|
|
|
|
* New command line option
|
|
|
|
GDB now accepts -l followed by a number to set the timeout for remote
|
|
debugging.
|
|
|
|
* GDB works with GCC -feliminate-dwarf2-dups
|
|
|
|
GDB now supports a more compact representation of DWARF-2 debug
|
|
information using DW_FORM_ref_addr references. These are produced
|
|
by GCC with the option -feliminate-dwarf2-dups and also by some
|
|
proprietary compilers. With GCC, you must use GCC 3.3.4 or later
|
|
to use -feliminate-dwarf2-dups.
|
|
|
|
* Internationalization
|
|
|
|
When supported by the host system, GDB will be built with
|
|
internationalization (libintl). The task of marking up the sources is
|
|
continued, we're looking forward to our first translation.
|
|
|
|
* Ada
|
|
|
|
Initial support for debugging programs compiled with the GNAT
|
|
implementation of the Ada programming language has been integrated
|
|
into GDB. In this release, support is limited to expression evaluation.
|
|
|
|
* New native configurations
|
|
|
|
GNU/Linux/m32r m32r-*-linux-gnu
|
|
|
|
* Remote 'p' packet
|
|
|
|
GDB's remote protocol now includes support for the 'p' packet. This
|
|
packet is used to fetch individual registers from a remote inferior.
|
|
|
|
* END-OF-LIFE registers[] compatibility module
|
|
|
|
GDB's internal register infrastructure has been completely rewritten.
|
|
The new infrastructure making possible the implementation of key new
|
|
features including 32x64 (e.g., 64-bit amd64 GDB debugging a 32-bit
|
|
i386 application).
|
|
|
|
GDB 6.3 will be the last release to include the the registers[]
|
|
compatibility module that allowed out-of-date configurations to
|
|
continue to work. This change directly impacts the following
|
|
configurations:
|
|
|
|
hppa-*-hpux
|
|
ia64-*-aix
|
|
mips-*-irix*
|
|
*-*-lynx
|
|
mips-*-linux-gnu
|
|
sds protocol
|
|
xdr protocol
|
|
powerpc bdm protocol
|
|
|
|
Unless there is activity to revive these configurations, they will be
|
|
made OBSOLETE in GDB 6.4, and REMOVED from GDB 6.5.
|
|
|
|
* OBSOLETE configurations and files
|
|
|
|
Configurations that have been declared obsolete in this release have
|
|
been commented out. Unless there is activity to revive these
|
|
configurations, the next release of GDB will have their sources
|
|
permanently REMOVED.
|
|
|
|
h8300-*-*
|
|
mcore-*-*
|
|
mn10300-*-*
|
|
ns32k-*-*
|
|
sh64-*-*
|
|
v850-*-*
|
|
|
|
*** Changes in GDB 6.2.1:
|
|
|
|
* MIPS `break main; run' gave an heuristic-fence-post warning
|
|
|
|
When attempting to run even a simple program, a warning about
|
|
heuristic-fence-post being hit would be reported. This problem has
|
|
been fixed.
|
|
|
|
* MIPS IRIX 'long double' crashed GDB
|
|
|
|
When examining a long double variable, GDB would get a segmentation
|
|
fault. The crash has been fixed (but GDB 6.2 cannot correctly examine
|
|
IRIX long double values).
|
|
|
|
* VAX and "next"
|
|
|
|
A bug in the VAX stack code was causing problems with the "next"
|
|
command. This problem has been fixed.
|
|
|
|
*** Changes in GDB 6.2:
|
|
|
|
* Fix for ``many threads''
|
|
|
|
On GNU/Linux systems that use the NPTL threads library, a program
|
|
rapidly creating and deleting threads would confuse GDB leading to the
|
|
error message:
|
|
|
|
ptrace: No such process.
|
|
thread_db_get_info: cannot get thread info: generic error
|
|
|
|
This problem has been fixed.
|
|
|
|
* "-async" and "-noasync" options removed.
|
|
|
|
Support for the broken "-noasync" option has been removed (it caused
|
|
GDB to dump core).
|
|
|
|
* New ``start'' command.
|
|
|
|
This command runs the program until the begining of the main procedure.
|
|
|
|
* New BSD Kernel Data Access Library (libkvm) interface
|
|
|
|
Using ``target kvm'' it is now possible to debug kernel core dumps and
|
|
live kernel memory images on various FreeBSD, NetBSD and OpenBSD
|
|
platforms. Currently supported (native-only) configurations are:
|
|
|
|
FreeBSD/amd64 x86_64-*-freebsd*
|
|
FreeBSD/i386 i?86-*-freebsd*
|
|
NetBSD/i386 i?86-*-netbsd*
|
|
NetBSD/m68k m68*-*-netbsd*
|
|
NetBSD/sparc sparc-*-netbsd*
|
|
OpenBSD/amd64 x86_64-*-openbsd*
|
|
OpenBSD/i386 i?86-*-openbsd*
|
|
OpenBSD/m68k m68*-openbsd*
|
|
OpenBSD/sparc sparc-*-openbsd*
|
|
|
|
* Signal trampoline code overhauled
|
|
|
|
Many generic problems with GDB's signal handling code have been fixed.
|
|
These include: backtraces through non-contiguous stacks; recognition
|
|
of sa_sigaction signal trampolines; backtrace from a NULL pointer
|
|
call; backtrace through a signal trampoline; step into and out of
|
|
signal handlers; and single-stepping in the signal trampoline.
|
|
|
|
Please note that kernel bugs are a limiting factor here. These
|
|
features have been shown to work on an s390 GNU/Linux system that
|
|
include a 2.6.8-rc1 kernel. Ref PR breakpoints/1702.
|
|
|
|
* Cygwin support for DWARF 2 added.
|
|
|
|
* New native configurations
|
|
|
|
GNU/Linux/hppa hppa*-*-linux*
|
|
OpenBSD/hppa hppa*-*-openbsd*
|
|
OpenBSD/m68k m68*-*-openbsd*
|
|
OpenBSD/m88k m88*-*-openbsd*
|
|
OpenBSD/powerpc powerpc-*-openbsd*
|
|
NetBSD/vax vax-*-netbsd*
|
|
OpenBSD/vax vax-*-openbsd*
|
|
|
|
* END-OF-LIFE frame compatibility module
|
|
|
|
GDB's internal frame infrastructure has been completely rewritten.
|
|
The new infrastructure making it possible to support key new features
|
|
including DWARF 2 Call Frame Information. To aid in the task of
|
|
migrating old configurations to this new infrastructure, a
|
|
compatibility module, that allowed old configurations to continue to
|
|
work, was also included.
|
|
|
|
GDB 6.2 will be the last release to include this frame compatibility
|
|
module. This change directly impacts the following configurations:
|
|
|
|
h8300-*-*
|
|
mcore-*-*
|
|
mn10300-*-*
|
|
ns32k-*-*
|
|
sh64-*-*
|
|
v850-*-*
|
|
xstormy16-*-*
|
|
|
|
Unless there is activity to revive these configurations, they will be
|
|
made OBSOLETE in GDB 6.3, and REMOVED from GDB 6.4.
|
|
|
|
* REMOVED configurations and files
|
|
|
|
Sun 3, running SunOS 3 m68*-*-sunos3*
|
|
Sun 3, running SunOS 4 m68*-*-sunos4*
|
|
Sun 2, running SunOS 3 m68000-*-sunos3*
|
|
Sun 2, running SunOS 4 m68000-*-sunos4*
|
|
Motorola 680x0 running LynxOS m68*-*-lynxos*
|
|
AT&T 3b1/Unix pc m68*-att-*
|
|
Bull DPX2 (68k, System V release 3) m68*-bull-sysv*
|
|
decstation mips-dec-* mips-little-*
|
|
riscos mips-*-riscos* mips-*-sysv*
|
|
sonymips mips-sony-*
|
|
sysv mips*-*-sysv4* (IRIX 5/6 not included)
|
|
|
|
*** Changes in GDB 6.1.1:
|
|
|
|
* TUI (Text-mode User Interface) built-in (also included in GDB 6.1)
|
|
|
|
The TUI (Text-mode User Interface) is now built as part of a default
|
|
GDB configuration. It is enabled by either selecting the TUI with the
|
|
command line option "-i=tui" or by running the separate "gdbtui"
|
|
program. For more information on the TUI, see the manual "Debugging
|
|
with GDB".
|
|
|
|
* Pending breakpoint support (also included in GDB 6.1)
|
|
|
|
Support has been added to allow you to specify breakpoints in shared
|
|
libraries that have not yet been loaded. If a breakpoint location
|
|
cannot be found, and the "breakpoint pending" option is set to auto,
|
|
GDB queries you if you wish to make the breakpoint pending on a future
|
|
shared-library load. If and when GDB resolves the breakpoint symbol,
|
|
the pending breakpoint is removed as one or more regular breakpoints
|
|
are created.
|
|
|
|
Pending breakpoints are very useful for GCJ Java debugging.
|
|
|
|
* Fixed ISO-C build problems
|
|
|
|
The files bfd/elf-bfd.h, gdb/dictionary.c and gdb/types.c contained
|
|
non ISO-C code that stopped them being built using a more strict ISO-C
|
|
compiler (e.g., IBM's C compiler).
|
|
|
|
* Fixed build problem on IRIX 5
|
|
|
|
Due to header problems with <sys/proc.h>, the file gdb/proc-api.c
|
|
wasn't able to compile compile on an IRIX 5 system.
|
|
|
|
* Added execute permission to gdb/gdbserver/configure
|
|
|
|
The shell script gdb/testsuite/gdb.stabs/configure lacked execute
|
|
permission. This bug would cause configure to fail on a number of
|
|
systems (Solaris, IRIX). Ref: server/519.
|
|
|
|
* Fixed build problem on hpux2.0w-hp-hpux11.00 using the HP ANSI C compiler
|
|
|
|
Older HPUX ANSI C compilers did not accept variable array sizes. somsolib.c
|
|
has been updated to use constant array sizes.
|
|
|
|
* Fixed a panic in the DWARF Call Frame Info code on Solaris 2.7
|
|
|
|
GCC 3.3.2, on Solaris 2.7, includes the DW_EH_PE_funcrel encoding in
|
|
its generated DWARF Call Frame Info. This encoding was causing GDB to
|
|
panic, that panic has been fixed. Ref: gdb/1628.
|
|
|
|
* Fixed a problem when examining parameters in shared library code.
|
|
|
|
When examining parameters in optimized shared library code generated
|
|
by a mainline GCC, GDB would incorrectly report ``Variable "..." is
|
|
not available''. GDB now correctly displays the variable's value.
|
|
|
|
*** Changes in GDB 6.1:
|
|
|
|
* Removed --with-mmalloc
|
|
|
|
Support for the mmalloc memory manager has been removed, as it
|
|
conflicted with the internal gdb byte cache.
|
|
|
|
* Changes in AMD64 configurations
|
|
|
|
The AMD64 target now includes the %cs and %ss registers. As a result
|
|
the AMD64 remote protocol has changed; this affects the floating-point
|
|
and SSE registers. If you rely on those registers for your debugging,
|
|
you should upgrade gdbserver on the remote side.
|
|
|
|
* Revised SPARC target
|
|
|
|
The SPARC target has been completely revised, incorporating the
|
|
FreeBSD/sparc64 support that was added for GDB 6.0. As a result
|
|
support for LynxOS and SunOS 4 has been dropped. Calling functions
|
|
from within GDB on operating systems with a non-executable stack
|
|
(Solaris, OpenBSD) now works.
|
|
|
|
* New C++ demangler
|
|
|
|
GDB has a new C++ demangler which does a better job on the mangled
|
|
names generated by current versions of g++. It also runs faster, so
|
|
with this and other changes gdb should now start faster on large C++
|
|
programs.
|
|
|
|
* DWARF 2 Location Expressions
|
|
|
|
GDB support for location expressions has been extended to support function
|
|
arguments and frame bases. Older versions of GDB could crash when they
|
|
encountered these.
|
|
|
|
* C++ nested types and namespaces
|
|
|
|
GDB's support for nested types and namespaces in C++ has been
|
|
improved, especially if you use the DWARF 2 debugging format. (This
|
|
is the default for recent versions of GCC on most platforms.)
|
|
Specifically, if you have a class "Inner" defined within a class or
|
|
namespace "Outer", then GDB realizes that the class's name is
|
|
"Outer::Inner", not simply "Inner". This should greatly reduce the
|
|
frequency of complaints about not finding RTTI symbols. In addition,
|
|
if you are stopped at inside of a function defined within a namespace,
|
|
GDB modifies its name lookup accordingly.
|
|
|
|
* New native configurations
|
|
|
|
NetBSD/amd64 x86_64-*-netbsd*
|
|
OpenBSD/amd64 x86_64-*-openbsd*
|
|
OpenBSD/alpha alpha*-*-openbsd*
|
|
OpenBSD/sparc sparc-*-openbsd*
|
|
OpenBSD/sparc64 sparc64-*-openbsd*
|
|
|
|
* New debugging protocols
|
|
|
|
M32R with SDI protocol m32r-*-elf*
|
|
|
|
* "set prompt-escape-char" command deleted.
|
|
|
|
The command "set prompt-escape-char" has been deleted. This command,
|
|
and its very obscure effet on GDB's prompt, was never documented,
|
|
tested, nor mentioned in the NEWS file.
|
|
|
|
* OBSOLETE configurations and files
|
|
|
|
Configurations that have been declared obsolete in this release have
|
|
been commented out. Unless there is activity to revive these
|
|
configurations, the next release of GDB will have their sources
|
|
permanently REMOVED.
|
|
|
|
Sun 3, running SunOS 3 m68*-*-sunos3*
|
|
Sun 3, running SunOS 4 m68*-*-sunos4*
|
|
Sun 2, running SunOS 3 m68000-*-sunos3*
|
|
Sun 2, running SunOS 4 m68000-*-sunos4*
|
|
Motorola 680x0 running LynxOS m68*-*-lynxos*
|
|
AT&T 3b1/Unix pc m68*-att-*
|
|
Bull DPX2 (68k, System V release 3) m68*-bull-sysv*
|
|
decstation mips-dec-* mips-little-*
|
|
riscos mips-*-riscos* mips-*-sysv*
|
|
sonymips mips-sony-*
|
|
sysv mips*-*-sysv4* (IRIX 5/6 not included)
|
|
|
|
* REMOVED configurations and files
|
|
|
|
SGI Irix-4.x mips-sgi-irix4 or iris4
|
|
SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris
|
|
Z8000 simulator z8k-zilog-none or z8ksim
|
|
Matsushita MN10200 w/simulator mn10200-*-*
|
|
H8/500 simulator h8500-hitachi-hms or h8500hms
|
|
HP/PA running BSD hppa*-*-bsd*
|
|
HP/PA running OSF/1 hppa*-*-osf*
|
|
HP/PA Pro target hppa*-*-pro*
|
|
PMAX (MIPS) running Mach 3.0 mips*-*-mach3*
|
|
386BSD i[3456]86-*-bsd*
|
|
Sequent family i[3456]86-sequent-sysv4*
|
|
i[3456]86-sequent-sysv*
|
|
i[3456]86-sequent-bsd*
|
|
SPARC running LynxOS sparc-*-lynxos*
|
|
SPARC running SunOS 4 sparc-*-sunos4*
|
|
Tsqware Sparclet sparclet-*-*
|
|
Fujitsu SPARClite sparclite-fujitsu-none or sparclite
|
|
|
|
*** Changes in GDB 6.0:
|
|
|
|
* Objective-C
|
|
|
|
Support for debugging the Objective-C programming language has been
|
|
integrated into GDB.
|
|
|
|
* New backtrace mechanism (includes DWARF 2 Call Frame Information).
|
|
|
|
DWARF 2's Call Frame Information makes available compiler generated
|
|
information that more exactly describes the program's run-time stack.
|
|
By using this information, GDB is able to provide more robust stack
|
|
backtraces.
|
|
|
|
The i386, amd64 (nee, x86-64), Alpha, m68hc11, ia64, and m32r targets
|
|
have been updated to use a new backtrace mechanism which includes
|
|
DWARF 2 CFI support.
|
|
|
|
* Hosted file I/O.
|
|
|
|
GDB's remote protocol has been extended to include support for hosted
|
|
file I/O (where the remote target uses GDB's file system). See GDB's
|
|
remote protocol documentation for details.
|
|
|
|
* All targets using the new architecture framework.
|
|
|
|
All of GDB's targets have been updated to use the new internal
|
|
architecture framework. The way is now open for future GDB releases
|
|
to include cross-architecture native debugging support (i386 on amd64,
|
|
ppc32 on ppc64).
|
|
|
|
* GNU/Linux's Thread Local Storage (TLS)
|
|
|
|
GDB now includes support for for the GNU/Linux implementation of
|
|
per-thread variables.
|
|
|
|
* GNU/Linux's Native POSIX Thread Library (NPTL)
|
|
|
|
GDB's thread code has been updated to work with either the new
|
|
GNU/Linux NPTL thread library or the older "LinuxThreads" library.
|
|
|
|
* Separate debug info.
|
|
|
|
GDB, in conjunction with BINUTILS, now supports a mechanism for
|
|
automatically loading debug information from a separate file. Instead
|
|
of shipping full debug and non-debug versions of system libraries,
|
|
system integrators can now instead ship just the stripped libraries
|
|
and optional debug files.
|
|
|
|
* DWARF 2 Location Expressions
|
|
|
|
DWARF 2 Location Expressions allow the compiler to more completely
|
|
describe the location of variables (even in optimized code) to the
|
|
debugger.
|
|
|
|
GDB now includes preliminary support for location expressions (support
|
|
for DW_OP_piece is still missing).
|
|
|
|
* Java
|
|
|
|
A number of long standing bugs that caused GDB to die while starting a
|
|
Java application have been fixed. GDB's Java support is now
|
|
considered "useable".
|
|
|
|
* GNU/Linux support for fork, vfork, and exec.
|
|
|
|
The "catch fork", "catch exec", "catch vfork", and "set follow-fork-mode"
|
|
commands are now implemented for GNU/Linux. They require a 2.5.x or later
|
|
kernel.
|
|
|
|
* GDB supports logging output to a file
|
|
|
|
There are two new commands, "set logging" and "show logging", which can be
|
|
used to capture GDB's output to a file.
|
|
|
|
* The meaning of "detach" has changed for gdbserver
|
|
|
|
The "detach" command will now resume the application, as documented. To
|
|
disconnect from gdbserver and leave it stopped, use the new "disconnect"
|
|
command.
|
|
|
|
* d10v, m68hc11 `regs' command deprecated
|
|
|
|
The `info registers' command has been updated so that it displays the
|
|
registers using a format identical to the old `regs' command.
|
|
|
|
* Profiling support
|
|
|
|
A new command, "maint set profile on/off", has been added. This command can
|
|
be used to enable or disable profiling while running GDB, to profile a
|
|
session or a set of commands. In addition there is a new configure switch,
|
|
"--enable-profiling", which will cause GDB to be compiled with profiling
|
|
data, for more informative profiling results.
|
|
|
|
* Default MI syntax changed to "mi2".
|
|
|
|
The default MI (machine interface) syntax, enabled by the command line
|
|
option "-i=mi", has been changed to "mi2". The previous MI syntax,
|
|
"mi1", can be enabled by specifying the option "-i=mi1".
|
|
|
|
Support for the original "mi0" syntax (included in GDB 5.0) has been
|
|
removed.
|
|
|
|
Fix for gdb/192: removed extraneous space when displaying frame level.
|
|
Fix for gdb/672: update changelist is now output in mi list format.
|
|
Fix for gdb/702: a -var-assign that updates the value now shows up
|
|
in a subsequent -var-update.
|
|
|
|
* New native configurations.
|
|
|
|
FreeBSD/amd64 x86_64-*-freebsd*
|
|
|
|
* Multi-arched targets.
|
|
|
|
HP/PA HPUX11 hppa*-*-hpux*
|
|
Renesas M32R/D w/simulator m32r-*-elf*
|
|
|
|
* OBSOLETE configurations and files
|
|
|
|
Configurations that have been declared obsolete in this release have
|
|
been commented out. Unless there is activity to revive these
|
|
configurations, the next release of GDB will have their sources
|
|
permanently REMOVED.
|
|
|
|
Z8000 simulator z8k-zilog-none or z8ksim
|
|
Matsushita MN10200 w/simulator mn10200-*-*
|
|
H8/500 simulator h8500-hitachi-hms or h8500hms
|
|
HP/PA running BSD hppa*-*-bsd*
|
|
HP/PA running OSF/1 hppa*-*-osf*
|
|
HP/PA Pro target hppa*-*-pro*
|
|
PMAX (MIPS) running Mach 3.0 mips*-*-mach3*
|
|
Sequent family i[3456]86-sequent-sysv4*
|
|
i[3456]86-sequent-sysv*
|
|
i[3456]86-sequent-bsd*
|
|
Tsqware Sparclet sparclet-*-*
|
|
Fujitsu SPARClite sparclite-fujitsu-none or sparclite
|
|
|
|
* REMOVED configurations and files
|
|
|
|
V850EA ISA
|
|
Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
|
|
IBM AIX PS/2 i[3456]86-*-aix
|
|
i386 running Mach 3.0 i[3456]86-*-mach3*
|
|
i386 running Mach i[3456]86-*-mach*
|
|
i386 running OSF/1 i[3456]86-*osf1mk*
|
|
HP/Apollo 68k Family m68*-apollo*-sysv*,
|
|
m68*-apollo*-bsd*,
|
|
m68*-hp-bsd*, m68*-hp-hpux*
|
|
Argonaut Risc Chip (ARC) arc-*-*
|
|
Mitsubishi D30V d30v-*-*
|
|
Fujitsu FR30 fr30-*-elf*
|
|
OS/9000 i[34]86-*-os9k
|
|
I960 with MON960 i960-*-coff
|
|
|
|
* MIPS $fp behavior changed
|
|
|
|
The convenience variable $fp, for the MIPS, now consistently returns
|
|
the address of the current frame's base. Previously, depending on the
|
|
context, $fp could refer to either $sp or the current frame's base
|
|
address. See ``8.10 Registers'' in the manual ``Debugging with GDB:
|
|
The GNU Source-Level Debugger''.
|
|
|
|
*** Changes in GDB 5.3:
|
|
|
|
* GNU/Linux shared library multi-threaded performance improved.
|
|
|
|
When debugging a multi-threaded application on GNU/Linux, GDB now uses
|
|
`/proc', in preference to `ptrace' for memory reads. This may result
|
|
in an improvement in the start-up time of multi-threaded, shared
|
|
library applications when run under GDB. One GDB user writes: ``loads
|
|
shared libs like mad''.
|
|
|
|
* ``gdbserver'' now supports multi-threaded applications on some targets
|
|
|
|
Support for debugging multi-threaded applications which use
|
|
the GNU/Linux LinuxThreads package has been added for
|
|
arm*-*-linux*-gnu*, i[3456]86-*-linux*-gnu*, mips*-*-linux*-gnu*,
|
|
powerpc*-*-linux*-gnu*, and sh*-*-linux*-gnu*.
|
|
|
|
* GDB now supports C/C++ preprocessor macros.
|
|
|
|
GDB now expands preprocessor macro invocations in C/C++ expressions,
|
|
and provides various commands for showing macro definitions and how
|
|
they expand.
|
|
|
|
The new command `macro expand EXPRESSION' expands any macro
|
|
invocations in expression, and shows the result.
|
|
|
|
The new command `show macro MACRO-NAME' shows the definition of the
|
|
macro named MACRO-NAME, and where it was defined.
|
|
|
|
Most compilers don't include information about macros in the debugging
|
|
information by default. In GCC 3.1, for example, you need to compile
|
|
your program with the options `-gdwarf-2 -g3'. If the macro
|
|
information is present in the executable, GDB will read it.
|
|
|
|
* Multi-arched targets.
|
|
|
|
DEC Alpha (partial) alpha*-*-*
|
|
DEC VAX (partial) vax-*-*
|
|
NEC V850 v850-*-*
|
|
National Semiconductor NS32000 (partial) ns32k-*-*
|
|
Motorola 68000 (partial) m68k-*-*
|
|
Motorola MCORE mcore-*-*
|
|
|
|
* New targets.
|
|
|
|
Fujitsu FRV architecture added by Red Hat frv*-*-*
|
|
|
|
|
|
* New native configurations
|
|
|
|
Alpha NetBSD alpha*-*-netbsd*
|
|
SH NetBSD sh*-*-netbsdelf*
|
|
MIPS NetBSD mips*-*-netbsd*
|
|
UltraSPARC NetBSD sparc64-*-netbsd*
|
|
|
|
* OBSOLETE configurations and files
|
|
|
|
Configurations that have been declared obsolete in this release have
|
|
been commented out. Unless there is activity to revive these
|
|
configurations, the next release of GDB will have their sources
|
|
permanently REMOVED.
|
|
|
|
Mitsubishi D30V d30v-*-*
|
|
OS/9000 i[34]86-*-os9k
|
|
IBM AIX PS/2 i[3456]86-*-aix
|
|
Fujitsu FR30 fr30-*-elf*
|
|
Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
|
|
Argonaut Risc Chip (ARC) arc-*-*
|
|
i386 running Mach 3.0 i[3456]86-*-mach3*
|
|
i386 running Mach i[3456]86-*-mach*
|
|
i386 running OSF/1 i[3456]86-*osf1mk*
|
|
HP/Apollo 68k Family m68*-apollo*-sysv*,
|
|
m68*-apollo*-bsd*,
|
|
m68*-hp-bsd*, m68*-hp-hpux*
|
|
I960 with MON960 i960-*-coff
|
|
|
|
* OBSOLETE languages
|
|
|
|
CHILL, a Pascal like language used by telecommunications companies.
|
|
|
|
* REMOVED configurations and files
|
|
|
|
AMD 29k family via UDI a29k-amd-udi, udi29k
|
|
A29K VxWorks a29k-*-vxworks
|
|
AMD 29000 embedded, using EBMON a29k-none-none
|
|
AMD 29000 embedded with COFF a29k-none-coff
|
|
AMD 29000 embedded with a.out a29k-none-aout
|
|
|
|
testsuite/gdb.hp/gdb.threads-hp/ directory
|
|
|
|
* New command "set max-user-call-depth <nnn>"
|
|
|
|
This command allows the user to limit the call depth of user-defined
|
|
commands. The default is 1024.
|
|
|
|
* Changes in FreeBSD/i386 native debugging.
|
|
|
|
Support for the "generate-core-file" has been added.
|
|
|
|
* New commands "dump", "append", and "restore".
|
|
|
|
These commands allow data to be copied from target memory
|
|
to a bfd-format or binary file (dump and append), and back
|
|
from a file into memory (restore).
|
|
|
|
* Improved "next/step" support on multi-processor Alpha Tru64.
|
|
|
|
The previous single-step mechanism could cause unpredictable problems,
|
|
including the random appearance of SIGSEGV or SIGTRAP signals. The use
|
|
of a software single-step mechanism prevents this.
|
|
|
|
*** Changes in GDB 5.2.1:
|
|
|
|
* New targets.
|
|
|
|
Atmel AVR avr*-*-*
|
|
|
|
* Bug fixes
|
|
|
|
gdb/182: gdb/323: gdb/237: On alpha, gdb was reporting:
|
|
mdebugread.c:2443: gdb-internal-error: sect_index_data not initialized
|
|
Fix, by Joel Brobecker imported from mainline.
|
|
|
|
gdb/439: gdb/291: On some ELF object files, gdb was reporting:
|
|
dwarf2read.c:1072: gdb-internal-error: sect_index_text not initialize
|
|
Fix, by Fred Fish, imported from mainline.
|
|
|
|
Dwarf2 .debug_frame & .eh_frame handler improved in many ways.
|
|
Surprisingly enough, it works now.
|
|
By Michal Ludvig, imported from mainline.
|
|
|
|
i386 hardware watchpoint support:
|
|
avoid misses on second run for some targets.
|
|
By Pierre Muller, imported from mainline.
|
|
|
|
*** Changes in GDB 5.2:
|
|
|
|
* New command "set trust-readonly-sections on[off]".
|
|
|
|
This command is a hint that tells gdb that read-only sections
|
|
really are read-only (ie. that their contents will not change).
|
|
In this mode, gdb will go to the object file rather than the
|
|
target to read memory from read-only sections (such as ".text").
|
|
This can be a significant performance improvement on some
|
|
(notably embedded) targets.
|
|
|
|
* New command "generate-core-file" (or "gcore").
|
|
|
|
This new gdb command allows the user to drop a core file of the child
|
|
process state at any time. So far it's been implemented only for
|
|
GNU/Linux and Solaris, but should be relatively easily ported to other
|
|
hosts. Argument is core file name (defaults to core.<pid>).
|
|
|
|
* New command line option
|
|
|
|
GDB now accepts --pid or -p followed by a process id.
|
|
|
|
* Change in command line behavior -- corefiles vs. process ids.
|
|
|
|
There is a subtle behavior in the way in which GDB handles
|
|
command line arguments. The first non-flag argument is always
|
|
a program to debug, but the second non-flag argument may either
|
|
be a corefile or a process id. Previously, GDB would attempt to
|
|
open the second argument as a corefile, and if that failed, would
|
|
issue a superfluous error message and then attempt to attach it as
|
|
a process. Now, if the second argument begins with a non-digit,
|
|
it will be treated as a corefile. If it begins with a digit,
|
|
GDB will attempt to attach it as a process, and if no such process
|
|
is found, will then attempt to open it as a corefile.
|
|
|
|
* Changes in ARM configurations.
|
|
|
|
Multi-arch support is enabled for all ARM configurations. The ARM/NetBSD
|
|
configuration is fully multi-arch.
|
|
|
|
* New native configurations
|
|
|
|
ARM NetBSD arm*-*-netbsd*
|
|
x86 OpenBSD i[3456]86-*-openbsd*
|
|
AMD x86-64 running GNU/Linux x86_64-*-linux-*
|
|
Sparc64 running FreeBSD sparc64-*-freebsd*
|
|
|
|
* New targets
|
|
|
|
Sanyo XStormy16 xstormy16-elf
|
|
|
|
* OBSOLETE configurations and files
|
|
|
|
Configurations that have been declared obsolete in this release have
|
|
been commented out. Unless there is activity to revive these
|
|
configurations, the next release of GDB will have their sources
|
|
permanently REMOVED.
|
|
|
|
AMD 29k family via UDI a29k-amd-udi, udi29k
|
|
A29K VxWorks a29k-*-vxworks
|
|
AMD 29000 embedded, using EBMON a29k-none-none
|
|
AMD 29000 embedded with COFF a29k-none-coff
|
|
AMD 29000 embedded with a.out a29k-none-aout
|
|
|
|
testsuite/gdb.hp/gdb.threads-hp/ directory
|
|
|
|
* REMOVED configurations and files
|
|
|
|
TI TMS320C80 tic80-*-*
|
|
WDC 65816 w65-*-*
|
|
PowerPC Solaris powerpcle-*-solaris*
|
|
PowerPC Windows NT powerpcle-*-cygwin32
|
|
PowerPC Netware powerpc-*-netware*
|
|
Harris/CXUX m88k m88*-harris-cxux*
|
|
Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-*
|
|
ns32k-utek-sysv* ns32k-utek-*
|
|
SunOS 4.0.Xi on i386 i[3456]86-*-sunos*
|
|
Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern*
|
|
Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news
|
|
ISI Optimum V (3.05) under 4.3bsd. m68*-isi-*
|
|
Apple Macintosh (MPW) host and target N/A host, powerpc-*-macos*
|
|
|
|
* Changes to command line processing
|
|
|
|
The new `--args' feature can be used to specify command-line arguments
|
|
for the inferior from gdb's command line.
|
|
|
|
* Changes to key bindings
|
|
|
|
There is a new `operate-and-get-next' function bound to `C-o'.
|
|
|
|
*** Changes in GDB 5.1.1
|
|
|
|
Fix compile problem on DJGPP.
|
|
|
|
Fix a problem with floating-point registers on the i386 being
|
|
corrupted.
|
|
|
|
Fix to stop GDB crashing on .debug_str debug info.
|
|
|
|
Numerous documentation fixes.
|
|
|
|
Numerous testsuite fixes.
|
|
|
|
*** Changes in GDB 5.1:
|
|
|
|
* New native configurations
|
|
|
|
Alpha FreeBSD alpha*-*-freebsd*
|
|
x86 FreeBSD 3.x and 4.x i[3456]86*-freebsd[34]*
|
|
MIPS GNU/Linux mips*-*-linux*
|
|
MIPS SGI Irix 6.x mips*-sgi-irix6*
|
|
ia64 AIX ia64-*-aix*
|
|
s390 and s390x GNU/Linux {s390,s390x}-*-linux*
|
|
|
|
* New targets
|
|
|
|
Motorola 68HC11 and 68HC12 m68hc11-elf
|
|
CRIS cris-axis
|
|
UltraSparc running GNU/Linux sparc64-*-linux*
|
|
|
|
* OBSOLETE configurations and files
|
|
|
|
x86 FreeBSD before 2.2 i[3456]86*-freebsd{1,2.[01]}*,
|
|
Harris/CXUX m88k m88*-harris-cxux*
|
|
Most ns32k hosts and targets ns32k-*-mach3* ns32k-umax-*
|
|
ns32k-utek-sysv* ns32k-utek-*
|
|
TI TMS320C80 tic80-*-*
|
|
WDC 65816 w65-*-*
|
|
Ultracomputer (29K) running Sym1 a29k-nyu-sym1 a29k-*-kern*
|
|
PowerPC Solaris powerpcle-*-solaris*
|
|
PowerPC Windows NT powerpcle-*-cygwin32
|
|
PowerPC Netware powerpc-*-netware*
|
|
SunOS 4.0.Xi on i386 i[3456]86-*-sunos*
|
|
Sony NEWS (68K) running NEWSOS 3.x m68*-sony-sysv news
|
|
ISI Optimum V (3.05) under 4.3bsd. m68*-isi-*
|
|
Apple Macintosh (MPW) host N/A
|
|
|
|
stuff.c (Program to stuff files into a specially prepared space in kdb)
|
|
kdb-start.c (Main loop for the standalone kernel debugger)
|
|
|
|
Configurations that have been declared obsolete in this release have
|
|
been commented out. Unless there is activity to revive these
|
|
configurations, the next release of GDB will have their sources
|
|
permanently REMOVED.
|
|
|
|
* REMOVED configurations and files
|
|
|
|
Altos 3068 m68*-altos-*
|
|
Convex c1-*-*, c2-*-*
|
|
Pyramid pyramid-*-*
|
|
ARM RISCix arm-*-* (as host)
|
|
Tahoe tahoe-*-*
|
|
ser-ocd.c *-*-*
|
|
|
|
* GDB has been converted to ISO C.
|
|
|
|
GDB's source code has been converted to ISO C. In particular, the
|
|
sources are fully protoized, and rely on standard headers being
|
|
present.
|
|
|
|
* Other news:
|
|
|
|
* "info symbol" works on platforms which use COFF, ECOFF, XCOFF, and NLM.
|
|
|
|
* The MI enabled by default.
|
|
|
|
The new machine oriented interface (MI) introduced in GDB 5.0 has been
|
|
revised and enabled by default. Packages which use GDB as a debugging
|
|
engine behind a UI or another front end are encouraged to switch to
|
|
using the GDB/MI interface, instead of the old annotations interface
|
|
which is now deprecated.
|
|
|
|
* Support for debugging Pascal programs.
|
|
|
|
GDB now includes support for debugging Pascal programs. The following
|
|
main features are supported:
|
|
|
|
- Pascal-specific data types such as sets;
|
|
|
|
- automatic recognition of Pascal sources based on file-name
|
|
extension;
|
|
|
|
- Pascal-style display of data types, variables, and functions;
|
|
|
|
- a Pascal expression parser.
|
|
|
|
However, some important features are not yet supported.
|
|
|
|
- Pascal string operations are not supported at all;
|
|
|
|
- there are some problems with boolean types;
|
|
|
|
- Pascal type hexadecimal constants are not supported
|
|
because they conflict with the internal variables format;
|
|
|
|
- support for Pascal objects and classes is not full yet;
|
|
|
|
- unlike Pascal, GDB is case-sensitive for symbol names.
|
|
|
|
* Changes in completion.
|
|
|
|
Commands such as `shell', `run' and `set args', which pass arguments
|
|
to inferior programs, now complete on file names, similar to what
|
|
users expect at the shell prompt.
|
|
|
|
Commands which accept locations, such as `disassemble', `print',
|
|
`breakpoint', `until', etc. now complete on filenames as well as
|
|
program symbols. Thus, if you type "break foob TAB", and the source
|
|
files linked into the programs include `foobar.c', that file name will
|
|
be one of the candidates for completion. However, file names are not
|
|
considered for completion after you typed a colon that delimits a file
|
|
name from a name of a function in that file, as in "break foo.c:bar".
|
|
|
|
`set demangle-style' completes on available demangling styles.
|
|
|
|
* New platform-independent commands:
|
|
|
|
It is now possible to define a post-hook for a command as well as a
|
|
hook that runs before the command. For more details, see the
|
|
documentation of `hookpost' in the GDB manual.
|
|
|
|
* Changes in GNU/Linux native debugging.
|
|
|
|
Support for debugging multi-threaded programs has been completely
|
|
revised for all platforms except m68k and sparc. You can now debug as
|
|
many threads as your system allows you to have.
|
|
|
|
Attach/detach is supported for multi-threaded programs.
|
|
|
|
Support for SSE registers was added for x86. This doesn't work for
|
|
multi-threaded programs though.
|
|
|
|
* Changes in MIPS configurations.
|
|
|
|
Multi-arch support is enabled for all MIPS configurations.
|
|
|
|
GDB can now be built as native debugger on SGI Irix 6.x systems for
|
|
debugging n32 executables. (Debugging 64-bit executables is not yet
|
|
supported.)
|
|
|
|
* Unified support for hardware watchpoints in all x86 configurations.
|
|
|
|
Most (if not all) native x86 configurations support hardware-assisted
|
|
breakpoints and watchpoints in a unified manner. This support
|
|
implements debug register sharing between watchpoints, which allows to
|
|
put a virtually infinite number of watchpoints on the same address,
|
|
and also supports watching regions up to 16 bytes with several debug
|
|
registers.
|
|
|
|
The new maintenance command `maintenance show-debug-regs' toggles
|
|
debugging print-outs in functions that insert, remove, and test
|
|
watchpoints and hardware breakpoints.
|
|
|
|
* Changes in the DJGPP native configuration.
|
|
|
|
New command ``info dos sysinfo'' displays assorted information about
|
|
the CPU, OS, memory, and DPMI server.
|
|
|
|
New commands ``info dos gdt'', ``info dos ldt'', and ``info dos idt''
|
|
display information about segment descriptors stored in GDT, LDT, and
|
|
IDT.
|
|
|
|
New commands ``info dos pde'' and ``info dos pte'' display entries
|
|
from Page Directory and Page Tables (for now works with CWSDPMI only).
|
|
New command ``info dos address-pte'' displays the Page Table entry for
|
|
a given linear address.
|
|
|
|
GDB can now pass command lines longer than 126 characters to the
|
|
program being debugged (requires an update to the libdbg.a library
|
|
which is part of the DJGPP development kit).
|
|
|
|
DWARF2 debug info is now supported.
|
|
|
|
It is now possible to `step' and `next' through calls to `longjmp'.
|
|
|
|
* Changes in documentation.
|
|
|
|
All GDB documentation was converted to GFDL, the GNU Free
|
|
Documentation License.
|
|
|
|
Tracepoints-related commands are now fully documented in the GDB
|
|
manual.
|
|
|
|
TUI, the Text-mode User Interface, is now documented in the manual.
|
|
|
|
Tracepoints-related commands are now fully documented in the GDB
|
|
manual.
|
|
|
|
The "GDB Internals" manual now has an index. It also includes
|
|
documentation of `ui_out' functions, GDB coding standards, x86
|
|
hardware watchpoints, and memory region attributes.
|
|
|
|
* GDB's version number moved to ``version.in''
|
|
|
|
The Makefile variable VERSION has been replaced by the file
|
|
``version.in''. People creating GDB distributions should update the
|
|
contents of this file.
|
|
|
|
* gdba.el deleted
|
|
|
|
GUD support is now a standard part of the EMACS distribution.
|
|
|
|
*** Changes in GDB 5.0:
|
|
|
|
* Improved support for debugging FP programs on x86 targets
|
|
|
|
Unified and much-improved support for debugging floating-point
|
|
programs on all x86 targets. In particular, ``info float'' now
|
|
displays the FP registers in the same format on all x86 targets, with
|
|
greater level of detail.
|
|
|
|
* Improvements and bugfixes in hardware-assisted watchpoints
|
|
|
|
It is now possible to watch array elements, struct members, and
|
|
bitfields with hardware-assisted watchpoints. Data-read watchpoints
|
|
on x86 targets no longer erroneously trigger when the address is
|
|
written.
|
|
|
|
* Improvements in the native DJGPP version of GDB
|
|
|
|
The distribution now includes all the scripts and auxiliary files
|
|
necessary to build the native DJGPP version on MS-DOS/MS-Windows
|
|
machines ``out of the box''.
|
|
|
|
The DJGPP version can now debug programs that use signals. It is
|
|
possible to catch signals that happened in the debuggee, deliver
|
|
signals to it, interrupt it with Ctrl-C, etc. (Previously, a signal
|
|
would kill the program being debugged.) Programs that hook hardware
|
|
interrupts (keyboard, timer, etc.) can also be debugged.
|
|
|
|
It is now possible to debug DJGPP programs that redirect their
|
|
standard handles or switch them to raw (as opposed to cooked) mode, or
|
|
even close them. The command ``run < foo > bar'' works as expected,
|
|
and ``info terminal'' reports useful information about the debuggee's
|
|
terminal, including raw/cooked mode, redirection, etc.
|
|
|
|
The DJGPP version now uses termios functions for console I/O, which
|
|
enables debugging graphics programs. Interrupting GDB with Ctrl-C
|
|
also works.
|
|
|
|
DOS-style file names with drive letters are now fully supported by
|
|
GDB.
|
|
|
|
It is now possible to debug DJGPP programs that switch their working
|
|
directory. It is also possible to rerun the debuggee any number of
|
|
times without restarting GDB; thus, you can use the same setup,
|
|
breakpoints, etc. for many debugging sessions.
|
|
|
|
* New native configurations
|
|
|
|
ARM GNU/Linux arm*-*-linux*
|
|
PowerPC GNU/Linux powerpc-*-linux*
|
|
|
|
* New targets
|
|
|
|
Motorola MCore mcore-*-*
|
|
x86 VxWorks i[3456]86-*-vxworks*
|
|
PowerPC VxWorks powerpc-*-vxworks*
|
|
TI TMS320C80 tic80-*-*
|
|
|
|
* OBSOLETE configurations
|
|
|
|
Altos 3068 m68*-altos-*
|
|
Convex c1-*-*, c2-*-*
|
|
Pyramid pyramid-*-*
|
|
ARM RISCix arm-*-* (as host)
|
|
Tahoe tahoe-*-*
|
|
|
|
Configurations that have been declared obsolete will be commented out,
|
|
but the code will be left in place. If there is no activity to revive
|
|
these configurations before the next release of GDB, the sources will
|
|
be permanently REMOVED.
|
|
|
|
* Gould support removed
|
|
|
|
Support for the Gould PowerNode and NP1 has been removed.
|
|
|
|
* New features for SVR4
|
|
|
|
On SVR4 native platforms (such as Solaris), if you attach to a process
|
|
without first loading a symbol file, GDB will now attempt to locate and
|
|
load symbols from the running process's executable file.
|
|
|
|
* Many C++ enhancements
|
|
|
|
C++ support has been greatly improved. Overload resolution now works properly
|
|
in almost all cases. RTTI support is on the way.
|
|
|
|
* Remote targets can connect to a sub-program
|
|
|
|
A popen(3) style serial-device has been added. This device starts a
|
|
sub-process (such as a stand-alone simulator) and then communicates
|
|
with that. The sub-program to run is specified using the syntax
|
|
``|<program> <args>'' vis:
|
|
|
|
(gdb) set remotedebug 1
|
|
(gdb) target extended-remote |mn10300-elf-sim program-args
|
|
|
|
* MIPS 64 remote protocol
|
|
|
|
A long standing bug in the mips64 remote protocol where by GDB
|
|
expected certain 32 bit registers (ex SR) to be transfered as 32
|
|
instead of 64 bits has been fixed.
|
|
|
|
The command ``set remote-mips64-transfers-32bit-regs on'' has been
|
|
added to provide backward compatibility with older versions of GDB.
|
|
|
|
* ``set remotebinarydownload'' replaced by ``set remote X-packet''
|
|
|
|
The command ``set remotebinarydownload'' command has been replaced by
|
|
``set remote X-packet''. Other commands in ``set remote'' family
|
|
include ``set remote P-packet''.
|
|
|
|
* Breakpoint commands accept ranges.
|
|
|
|
The breakpoint commands ``enable'', ``disable'', and ``delete'' now
|
|
accept a range of breakpoints, e.g. ``5-7''. The tracepoint command
|
|
``tracepoint passcount'' also accepts a range of tracepoints.
|
|
|
|
* ``apropos'' command added.
|
|
|
|
The ``apropos'' command searches through command names and
|
|
documentation strings, printing out matches, making it much easier to
|
|
try to find a command that does what you are looking for.
|
|
|
|
* New MI interface
|
|
|
|
A new machine oriented interface (MI) has been added to GDB. This
|
|
interface is designed for debug environments running GDB as a separate
|
|
process. This is part of the long term libGDB project. See the
|
|
"GDB/MI" chapter of the GDB manual for further information. It can be
|
|
enabled by configuring with:
|
|
|
|
.../configure --enable-gdbmi
|
|
|
|
*** Changes in GDB-4.18:
|
|
|
|
* New native configurations
|
|
|
|
HP-UX 10.20 hppa*-*-hpux10.20
|
|
HP-UX 11.x hppa*-*-hpux11.0*
|
|
M68K GNU/Linux m68*-*-linux*
|
|
|
|
* New targets
|
|
|
|
Fujitsu FR30 fr30-*-elf*
|
|
Intel StrongARM strongarm-*-*
|
|
Mitsubishi D30V d30v-*-*
|
|
|
|
* OBSOLETE configurations
|
|
|
|
Gould PowerNode, NP1 np1-*-*, pn-*-*
|
|
|
|
Configurations that have been declared obsolete will be commented out,
|
|
but the code will be left in place. If there is no activity to revive
|
|
these configurations before the next release of GDB, the sources will
|
|
be permanently REMOVED.
|
|
|
|
* ANSI/ISO C
|
|
|
|
As a compatibility experiment, GDB's source files buildsym.h and
|
|
buildsym.c have been converted to pure standard C, no longer
|
|
containing any K&R compatibility code. We believe that all systems in
|
|
use today either come with a standard C compiler, or have a GCC port
|
|
available. If this is not true, please report the affected
|
|
configuration to bug-gdb@gnu.org immediately. See the README file for
|
|
information about getting a standard C compiler if you don't have one
|
|
already.
|
|
|
|
* Readline 2.2
|
|
|
|
GDB now uses readline 2.2.
|
|
|
|
* set extension-language
|
|
|
|
You can now control the mapping between filename extensions and source
|
|
languages by using the `set extension-language' command. For instance,
|
|
you can ask GDB to treat .c files as C++ by saying
|
|
set extension-language .c c++
|
|
The command `info extensions' lists all of the recognized extensions
|
|
and their associated languages.
|
|
|
|
* Setting processor type for PowerPC and RS/6000
|
|
|
|
When GDB is configured for a powerpc*-*-* or an rs6000*-*-* target,
|
|
you can use the `set processor' command to specify what variant of the
|
|
PowerPC family you are debugging. The command
|
|
|
|
set processor NAME
|
|
|
|
sets the PowerPC/RS6000 variant to NAME. GDB knows about the
|
|
following PowerPC and RS6000 variants:
|
|
|
|
ppc-uisa PowerPC UISA - a PPC processor as viewed by user-level code
|
|
rs6000 IBM RS6000 ("POWER") architecture, user-level view
|
|
403 IBM PowerPC 403
|
|
403GC IBM PowerPC 403GC
|
|
505 Motorola PowerPC 505
|
|
860 Motorola PowerPC 860 or 850
|
|
601 Motorola PowerPC 601
|
|
602 Motorola PowerPC 602
|
|
603 Motorola/IBM PowerPC 603 or 603e
|
|
604 Motorola PowerPC 604 or 604e
|
|
750 Motorola/IBM PowerPC 750 or 750
|
|
|
|
At the moment, this command just tells GDB what to name the
|
|
special-purpose processor registers. Since almost all the affected
|
|
registers are inaccessible to user-level programs, this command is
|
|
only useful for remote debugging in its present form.
|
|
|
|
* HP-UX support
|
|
|
|
Thanks to a major code donation from Hewlett-Packard, GDB now has much
|
|
more extensive support for HP-UX. Added features include shared
|
|
library support, kernel threads and hardware watchpoints for 11.00,
|
|
support for HP's ANSI C and C++ compilers, and a compatibility mode
|
|
for xdb and dbx commands.
|
|
|
|
* Catchpoints
|
|
|
|
HP's donation includes the new concept of catchpoints, which is a
|
|
generalization of the old catch command. On HP-UX, it is now possible
|
|
to catch exec, fork, and vfork, as well as library loading.
|
|
|
|
This means that the existing catch command has changed; its first
|
|
argument now specifies the type of catch to be set up. See the
|
|
output of "help catch" for a list of catchpoint types.
|
|
|
|
* Debugging across forks
|
|
|
|
On HP-UX, you can choose which process to debug when a fork() happens
|
|
in the inferior.
|
|
|
|
* TUI
|
|
|
|
HP has donated a curses-based terminal user interface (TUI). To get
|
|
it, build with --enable-tui. Although this can be enabled for any
|
|
configuration, at present it only works for native HP debugging.
|
|
|
|
* GDB remote protocol additions
|
|
|
|
A new protocol packet 'X' that writes binary data is now available.
|
|
Default behavior is to try 'X', then drop back to 'M' if the stub
|
|
fails to respond. The settable variable `remotebinarydownload'
|
|
allows explicit control over the use of 'X'.
|
|
|
|
For 64-bit targets, the memory packets ('M' and 'm') can now contain a
|
|
full 64-bit address. The command
|
|
|
|
set remoteaddresssize 32
|
|
|
|
can be used to revert to the old behaviour. For existing remote stubs
|
|
the change should not be noticed, as the additional address information
|
|
will be discarded.
|
|
|
|
In order to assist in debugging stubs, you may use the maintenance
|
|
command `packet' to send any text string to the stub. For instance,
|
|
|
|
maint packet heythere
|
|
|
|
sends the packet "$heythere#<checksum>". Note that it is very easy to
|
|
disrupt a debugging session by sending the wrong packet at the wrong
|
|
time.
|
|
|
|
The compare-sections command allows you to compare section data on the
|
|
target to what is in the executable file without uploading or
|
|
downloading, by comparing CRC checksums.
|
|
|
|
* Tracing can collect general expressions
|
|
|
|
You may now collect general expressions at tracepoints. This requires
|
|
further additions to the target-side stub; see tracepoint.c and
|
|
doc/agentexpr.texi for further details.
|
|
|
|
* mask-address variable for Mips
|
|
|
|
For Mips targets, you may control the zeroing of the upper 32 bits of
|
|
a 64-bit address by entering `set mask-address on'. This is mainly
|
|
of interest to users of embedded R4xxx and R5xxx processors.
|
|
|
|
* Higher serial baud rates
|
|
|
|
GDB's serial code now allows you to specify baud rates 57600, 115200,
|
|
230400, and 460800 baud. (Note that your host system may not be able
|
|
to achieve all of these rates.)
|
|
|
|
* i960 simulator
|
|
|
|
The i960 configuration now includes an initial implementation of a
|
|
builtin simulator, contributed by Jim Wilson.
|
|
|
|
|
|
*** Changes in GDB-4.17:
|
|
|
|
* New native configurations
|
|
|
|
Alpha GNU/Linux alpha*-*-linux*
|
|
Unixware 2.x i[3456]86-unixware2*
|
|
Irix 6.x mips*-sgi-irix6*
|
|
PowerPC GNU/Linux powerpc-*-linux*
|
|
PowerPC Solaris powerpcle-*-solaris*
|
|
Sparc GNU/Linux sparc-*-linux*
|
|
Motorola sysV68 R3V7.1 m68k-motorola-sysv
|
|
|
|
* New targets
|
|
|
|
Argonaut Risc Chip (ARC) arc-*-*
|
|
Hitachi H8/300S h8300*-*-*
|
|
Matsushita MN10200 w/simulator mn10200-*-*
|
|
Matsushita MN10300 w/simulator mn10300-*-*
|
|
MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf*
|
|
MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf*
|
|
MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf*
|
|
Mitsubishi D10V w/simulator d10v-*-*
|
|
Mitsubishi M32R/D w/simulator m32r-*-elf*
|
|
Tsqware Sparclet sparclet-*-*
|
|
NEC V850 w/simulator v850-*-*
|
|
|
|
* New debugging protocols
|
|
|
|
ARM with RDI protocol arm*-*-*
|
|
M68K with dBUG monitor m68*-*-{aout,coff,elf}
|
|
DDB and LSI variants of PMON protocol mips*-*-*
|
|
PowerPC with DINK32 monitor powerpc{,le}-*-eabi
|
|
PowerPC with SDS protocol powerpc{,le}-*-eabi
|
|
Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi
|
|
|
|
* DWARF 2
|
|
|
|
All configurations can now understand and use the DWARF 2 debugging
|
|
format. The choice is automatic, if the symbol file contains DWARF 2
|
|
information.
|
|
|
|
* Java frontend
|
|
|
|
GDB now includes basic Java language support. This support is
|
|
only useful with Java compilers that produce native machine code.
|
|
|
|
* solib-absolute-prefix and solib-search-path
|
|
|
|
For SunOS and SVR4 shared libraries, you may now set the prefix for
|
|
loading absolute shared library symbol files, and the search path for
|
|
locating non-absolute shared library symbol files.
|
|
|
|
* Live range splitting
|
|
|
|
GDB can now effectively debug code for which GCC has performed live
|
|
range splitting as part of its optimization. See gdb/doc/LRS for
|
|
more details on the expected format of the stabs information.
|
|
|
|
* Hurd support
|
|
|
|
GDB's support for the GNU Hurd, including thread debugging, has been
|
|
updated to work with current versions of the Hurd.
|
|
|
|
* ARM Thumb support
|
|
|
|
GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit
|
|
instruction set. ARM GDB automatically detects when Thumb
|
|
instructions are in use, and adjusts disassembly and backtracing
|
|
accordingly.
|
|
|
|
* MIPS16 support
|
|
|
|
GDB's MIPS target configurations now handle the MIP16 16-bit
|
|
instruction set.
|
|
|
|
* Overlay support
|
|
|
|
GDB now includes support for overlays; if an executable has been
|
|
linked such that multiple sections are based at the same address, GDB
|
|
will decide which section to use for symbolic info. You can choose to
|
|
control the decision manually, using overlay commands, or implement
|
|
additional target-side support and use "overlay load-target" to bring
|
|
in the overlay mapping. Do "help overlay" for more detail.
|
|
|
|
* info symbol
|
|
|
|
The command "info symbol <address>" displays information about
|
|
the symbol at the specified address.
|
|
|
|
* Trace support
|
|
|
|
The standard remote protocol now includes an extension that allows
|
|
asynchronous collection and display of trace data. This requires
|
|
extensive support in the target-side debugging stub. Tracing mode
|
|
includes a new interaction mode in GDB and new commands: see the
|
|
file tracepoint.c for more details.
|
|
|
|
* MIPS simulator
|
|
|
|
Configurations for embedded MIPS now include a simulator contributed
|
|
by Cygnus Solutions. The simulator supports the instruction sets
|
|
of most MIPS variants.
|
|
|
|
* Sparc simulator
|
|
|
|
Sparc configurations may now include the ERC32 simulator contributed
|
|
by the European Space Agency. The simulator is not built into
|
|
Sparc targets by default; configure with --enable-sim to include it.
|
|
|
|
* set architecture
|
|
|
|
For target configurations that may include multiple variants of a
|
|
basic architecture (such as MIPS and SH), you may now set the
|
|
architecture explicitly. "set arch" sets, "info arch" lists
|
|
the possible architectures.
|
|
|
|
*** Changes in GDB-4.16:
|
|
|
|
* New native configurations
|
|
|
|
Windows 95, x86 Windows NT i[345]86-*-cygwin32
|
|
M68K NetBSD m68k-*-netbsd*
|
|
PowerPC AIX 4.x powerpc-*-aix*
|
|
PowerPC MacOS powerpc-*-macos*
|
|
PowerPC Windows NT powerpcle-*-cygwin32
|
|
RS/6000 AIX 4.x rs6000-*-aix4*
|
|
|
|
* New targets
|
|
|
|
ARM with RDP protocol arm-*-*
|
|
I960 with MON960 i960-*-coff
|
|
MIPS VxWorks mips*-*-vxworks*
|
|
MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf*
|
|
PowerPC with PPCBUG monitor powerpc{,le}-*-eabi*
|
|
Hitachi SH3 sh-*-*
|
|
Matra Sparclet sparclet-*-*
|
|
|
|
* PowerPC simulator
|
|
|
|
The powerpc-eabi configuration now includes the PSIM simulator,
|
|
contributed by Andrew Cagney, with assistance from Mike Meissner.
|
|
PSIM is a very elaborate model of the PowerPC, including not only
|
|
basic instruction set execution, but also details of execution unit
|
|
performance and I/O hardware. See sim/ppc/README for more details.
|
|
|
|
* Solaris 2.5
|
|
|
|
GDB now works with Solaris 2.5.
|
|
|
|
* Windows 95/NT native
|
|
|
|
GDB will now work as a native debugger on Windows 95 and Windows NT.
|
|
To build it from source, you must use the "gnu-win32" environment,
|
|
which uses a DLL to emulate enough of Unix to run the GNU tools.
|
|
Further information, binaries, and sources are available at
|
|
ftp.cygnus.com, under pub/gnu-win32.
|
|
|
|
* dont-repeat command
|
|
|
|
If a user-defined command includes the command `dont-repeat', then the
|
|
command will not be repeated if the user just types return. This is
|
|
useful if the command is time-consuming to run, so that accidental
|
|
extra keystrokes don't run the same command many times.
|
|
|
|
* Send break instead of ^C
|
|
|
|
The standard remote protocol now includes an option to send a break
|
|
rather than a ^C to the target in order to interrupt it. By default,
|
|
GDB will send ^C; to send a break, set the variable `remotebreak' to 1.
|
|
|
|
* Remote protocol timeout
|
|
|
|
The standard remote protocol includes a new variable `remotetimeout'
|
|
that allows you to set the number of seconds before GDB gives up trying
|
|
to read from the target. The default value is 2.
|
|
|
|
* Automatic tracking of dynamic object loading (HPUX and Solaris only)
|
|
|
|
By default GDB will automatically keep track of objects as they are
|
|
loaded and unloaded by the dynamic linker. By using the command `set
|
|
stop-on-solib-events 1' you can arrange for GDB to stop the inferior
|
|
when shared library events occur, thus allowing you to set breakpoints
|
|
in shared libraries which are explicitly loaded by the inferior.
|
|
|
|
Note this feature does not work on hpux8. On hpux9 you must link
|
|
/usr/lib/end.o into your program. This feature should work
|
|
automatically on hpux10.
|
|
|
|
* Irix 5.x hardware watchpoint support
|
|
|
|
Irix 5 configurations now support the use of hardware watchpoints.
|
|
|
|
* Mips protocol "SYN garbage limit"
|
|
|
|
When debugging a Mips target using the `target mips' protocol, you
|
|
may set the number of characters that GDB will ignore by setting
|
|
the `syn-garbage-limit'. A value of -1 means that GDB will ignore
|
|
every character. The default value is 1050.
|
|
|
|
* Recording and replaying remote debug sessions
|
|
|
|
If you set `remotelogfile' to the name of a file, gdb will write to it
|
|
a recording of a remote debug session. This recording may then be
|
|
replayed back to gdb using "gdbreplay". See gdbserver/README for
|
|
details. This is useful when you have a problem with GDB while doing
|
|
remote debugging; you can make a recording of the session and send it
|
|
to someone else, who can then recreate the problem.
|
|
|
|
* Speedups for remote debugging
|
|
|
|
GDB includes speedups for downloading and stepping MIPS systems using
|
|
the IDT monitor, fast downloads to the Hitachi SH E7000 emulator,
|
|
and more efficient S-record downloading.
|
|
|
|
* Memory use reductions and statistics collection
|
|
|
|
GDB now uses less memory and reports statistics about memory usage.
|
|
Try the `maint print statistics' command, for example.
|
|
|
|
*** Changes in GDB-4.15:
|
|
|
|
* Psymtabs for XCOFF
|
|
|
|
The symbol reader for AIX GDB now uses partial symbol tables. This
|
|
can greatly improve startup time, especially for large executables.
|
|
|
|
* Remote targets use caching
|
|
|
|
Remote targets now use a data cache to speed up communication with the
|
|
remote side. The data cache could lead to incorrect results because
|
|
it doesn't know about volatile variables, thus making it impossible to
|
|
debug targets which use memory mapped I/O devices. `set remotecache
|
|
off' turns the the data cache off.
|
|
|
|
* Remote targets may have threads
|
|
|
|
The standard remote protocol now includes support for multiple threads
|
|
in the target system, using new protocol commands 'H' and 'T'. See
|
|
gdb/remote.c for details.
|
|
|
|
* NetROM support
|
|
|
|
If GDB is configured with `--enable-netrom', then it will include
|
|
support for the NetROM ROM emulator from XLNT Designs. The NetROM
|
|
acts as though it is a bank of ROM on the target board, but you can
|
|
write into it over the network. GDB's support consists only of
|
|
support for fast loading into the emulated ROM; to debug, you must use
|
|
another protocol, such as standard remote protocol. The usual
|
|
sequence is something like
|
|
|
|
target nrom <netrom-hostname>
|
|
load <prog>
|
|
target remote <netrom-hostname>:1235
|
|
|
|
* Macintosh host
|
|
|
|
GDB now includes support for the Apple Macintosh, as a host only. It
|
|
may be run as either an MPW tool or as a standalone application, and
|
|
it can debug through the serial port. All the usual GDB commands are
|
|
available, but to the target command, you must supply "serial" as the
|
|
device type instead of "/dev/ttyXX". See mpw-README in the main
|
|
directory for more information on how to build. The MPW configuration
|
|
scripts */mpw-config.in support only a few targets, and only the
|
|
mips-idt-ecoff target has been tested.
|
|
|
|
* Autoconf
|
|
|
|
GDB configuration now uses autoconf. This is not user-visible,
|
|
but does simplify configuration and building.
|
|
|
|
* hpux10
|
|
|
|
GDB now supports hpux10.
|
|
|
|
*** Changes in GDB-4.14:
|
|
|
|
* New native configurations
|
|
|
|
x86 FreeBSD i[345]86-*-freebsd
|
|
x86 NetBSD i[345]86-*-netbsd
|
|
NS32k NetBSD ns32k-*-netbsd
|
|
Sparc NetBSD sparc-*-netbsd
|
|
|
|
* New targets
|
|
|
|
A29K VxWorks a29k-*-vxworks
|
|
HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro*
|
|
CPU32 EST-300 emulator m68*-*-est*
|
|
PowerPC ELF powerpc-*-elf
|
|
WDC 65816 w65-*-*
|
|
|
|
* Alpha OSF/1 support for procfs
|
|
|
|
GDB now supports procfs under OSF/1-2.x and higher, which makes it
|
|
possible to attach to running processes. As the mounting of the /proc
|
|
filesystem is optional on the Alpha, GDB automatically determines
|
|
the availability of /proc during startup. This can lead to problems
|
|
if /proc is unmounted after GDB has been started.
|
|
|
|
* Arguments to user-defined commands
|
|
|
|
User commands may accept up to 10 arguments separated by whitespace.
|
|
Arguments are accessed within the user command via $arg0..$arg9. A
|
|
trivial example:
|
|
define adder
|
|
print $arg0 + $arg1 + $arg2
|
|
|
|
To execute the command use:
|
|
adder 1 2 3
|
|
|
|
Defines the command "adder" which prints the sum of its three arguments.
|
|
Note the arguments are text substitutions, so they may reference variables,
|
|
use complex expressions, or even perform inferior function calls.
|
|
|
|
* New `if' and `while' commands
|
|
|
|
This makes it possible to write more sophisticated user-defined
|
|
commands. Both commands take a single argument, which is the
|
|
expression to evaluate, and must be followed by the commands to
|
|
execute, one per line, if the expression is nonzero, the list being
|
|
terminated by the word `end'. The `if' command list may include an
|
|
`else' word, which causes the following commands to be executed only
|
|
if the expression is zero.
|
|
|
|
* Fortran source language mode
|
|
|
|
GDB now includes partial support for Fortran 77. It will recognize
|
|
Fortran programs and can evaluate a subset of Fortran expressions, but
|
|
variables and functions may not be handled correctly. GDB will work
|
|
with G77, but does not yet know much about symbols emitted by other
|
|
Fortran compilers.
|
|
|
|
* Better HPUX support
|
|
|
|
Most debugging facilities now work on dynamic executables for HPPAs
|
|
running hpux9 or later. You can attach to running dynamically linked
|
|
processes, but by default the dynamic libraries will be read-only, so
|
|
for instance you won't be able to put breakpoints in them. To change
|
|
that behavior do the following before running the program:
|
|
|
|
adb -w a.out
|
|
__dld_flags?W 0x5
|
|
control-d
|
|
|
|
This will cause the libraries to be mapped private and read-write.
|
|
To revert to the normal behavior, do this:
|
|
|
|
adb -w a.out
|
|
__dld_flags?W 0x4
|
|
control-d
|
|
|
|
You cannot set breakpoints or examine data in the library until after
|
|
the library is loaded if the function/data symbols do not have
|
|
external linkage.
|
|
|
|
GDB can now also read debug symbols produced by the HP C compiler on
|
|
HPPAs (sorry, no C++, Fortran or 68k support).
|
|
|
|
* Target byte order now dynamically selectable
|
|
|
|
You can choose which byte order to use with a target system, via the
|
|
commands "set endian big" and "set endian little", and you can see the
|
|
current setting by using "show endian". You can also give the command
|
|
"set endian auto", in which case GDB will use the byte order
|
|
associated with the executable. Currently, only embedded MIPS
|
|
configurations support dynamic selection of target byte order.
|
|
|
|
* New DOS host serial code
|
|
|
|
This version uses DPMI interrupts to handle buffered I/O, so you
|
|
no longer need to run asynctsr when debugging boards connected to
|
|
a PC's serial port.
|
|
|
|
*** Changes in GDB-4.13:
|
|
|
|
* New "complete" command
|
|
|
|
This lists all the possible completions for the rest of the line, if it
|
|
were to be given as a command itself. This is intended for use by emacs.
|
|
|
|
* Trailing space optional in prompt
|
|
|
|
"set prompt" no longer adds a space for you after the prompt you set. This
|
|
allows you to set a prompt which ends in a space or one that does not.
|
|
|
|
* Breakpoint hit counts
|
|
|
|
"info break" now displays a count of the number of times the breakpoint
|
|
has been hit. This is especially useful in conjunction with "ignore"; you
|
|
can ignore a large number of breakpoint hits, look at the breakpoint info
|
|
to see how many times the breakpoint was hit, then run again, ignoring one
|
|
less than that number, and this will get you quickly to the last hit of
|
|
that breakpoint.
|
|
|
|
* Ability to stop printing at NULL character
|
|
|
|
"set print null-stop" will cause GDB to stop printing the characters of
|
|
an array when the first NULL is encountered. This is useful when large
|
|
arrays actually contain only short strings.
|
|
|
|
* Shared library breakpoints
|
|
|
|
In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set
|
|
breakpoints in shared libraries before the executable is run.
|
|
|
|
* Hardware watchpoints
|
|
|
|
There is a new hardware breakpoint for the watch command for sparclite
|
|
targets. See gdb/sparclite/hw_breakpoint.note.
|
|
|
|
Hardware watchpoints are also now supported under GNU/Linux.
|
|
|
|
* Annotations
|
|
|
|
Annotations have been added. These are for use with graphical interfaces,
|
|
and are still experimental. Currently only gdba.el uses these.
|
|
|
|
* Improved Irix 5 support
|
|
|
|
GDB now works properly with Irix 5.2.
|
|
|
|
* Improved HPPA support
|
|
|
|
GDB now works properly with the latest GCC and GAS.
|
|
|
|
* New native configurations
|
|
|
|
Sequent PTX4 i[34]86-sequent-ptx4
|
|
HPPA running OSF/1 hppa*-*-osf*
|
|
Atari TT running SVR4 m68*-*-sysv4*
|
|
RS/6000 LynxOS rs6000-*-lynxos*
|
|
|
|
* New targets
|
|
|
|
OS/9000 i[34]86-*-os9k
|
|
MIPS R4000 mips64*{,el}-*-{ecoff,elf}
|
|
Sparc64 sparc64-*-*
|
|
|
|
* Hitachi SH7000 and E7000-PC ICE support
|
|
|
|
There is now support for communicating with the Hitachi E7000-PC ICE.
|
|
This is available automatically when GDB is configured for the SH.
|
|
|
|
* Fixes
|
|
|
|
As usual, a variety of small fixes and improvements, both generic
|
|
and configuration-specific. See the ChangeLog for more detail.
|
|
|
|
*** Changes in GDB-4.12:
|
|
|
|
* Irix 5 is now supported
|
|
|
|
* HPPA support
|
|
|
|
GDB-4.12 on the HPPA has a number of changes which make it unable
|
|
to debug the output from the currently released versions of GCC and
|
|
GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release
|
|
of GCC and GAS, versions of these tools designed to work with GDB-4.12
|
|
can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist.
|
|
|
|
|
|
*** Changes in GDB-4.11:
|
|
|
|
* User visible changes:
|
|
|
|
* Remote Debugging
|
|
|
|
The "set remotedebug" option is now consistent between the mips remote
|
|
target, remote targets using the gdb-specific protocol, UDI (AMD's
|
|
debug protocol for the 29k) and the 88k bug monitor. It is now an
|
|
integer specifying a debug level (normally 0 or 1, but 2 means more
|
|
debugging info for the mips target).
|
|
|
|
* DEC Alpha native support
|
|
|
|
GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable
|
|
debug info, but GDB works fairly well with the DEC compiler and should
|
|
work with a future GCC release. See the README file for a few
|
|
Alpha-specific notes.
|
|
|
|
* Preliminary thread implementation
|
|
|
|
GDB now has preliminary thread support for both SGI/Irix and LynxOS.
|
|
|
|
* LynxOS native and target support for 386
|
|
|
|
This release has been hosted on LynxOS 2.2, and also can be configured
|
|
to remotely debug programs running under LynxOS (see gdb/gdbserver/README
|
|
for details).
|
|
|
|
* Improvements in C++ mangling/demangling.
|
|
|
|
This release has much better g++ debugging, specifically in name
|
|
mangling/demangling, virtual function calls, print virtual table,
|
|
call methods, ...etc.
|
|
|
|
*** Changes in GDB-4.10:
|
|
|
|
* User visible changes:
|
|
|
|
Remote debugging using the GDB-specific (`target remote') protocol now
|
|
supports the `load' command. This is only useful if you have some
|
|
other way of getting the stub to the target system, and you can put it
|
|
somewhere in memory where it won't get clobbered by the download.
|
|
|
|
Filename completion now works.
|
|
|
|
When run under emacs mode, the "info line" command now causes the
|
|
arrow to point to the line specified. Also, "info line" prints
|
|
addresses in symbolic form (as well as hex).
|
|
|
|
All vxworks based targets now support a user settable option, called
|
|
vxworks-timeout. This option represents the number of seconds gdb
|
|
should wait for responses to rpc's. You might want to use this if
|
|
your vxworks target is, perhaps, a slow software simulator or happens
|
|
to be on the far side of a thin network line.
|
|
|
|
* DEC alpha support
|
|
|
|
This release contains support for using a DEC alpha as a GDB host for
|
|
cross debugging. Native alpha debugging is not supported yet.
|
|
|
|
|
|
*** Changes in GDB-4.9:
|
|
|
|
* Testsuite
|
|
|
|
This is the first GDB release which is accompanied by a matching testsuite.
|
|
The testsuite requires installation of dejagnu, which should be available
|
|
via ftp from most sites that carry GNU software.
|
|
|
|
* C++ demangling
|
|
|
|
'Cfront' style demangling has had its name changed to 'ARM' style, to
|
|
emphasize that it was written from the specifications in the C++ Annotated
|
|
Reference Manual, not necessarily to be compatible with AT&T cfront. Despite
|
|
disclaimers, it still generated too much confusion with users attempting to
|
|
use gdb with AT&T cfront.
|
|
|
|
* Simulators
|
|
|
|
GDB now uses a standard remote interface to a simulator library.
|
|
So far, the library contains simulators for the Zilog Z8001/2, the
|
|
Hitachi H8/300, H8/500 and Super-H.
|
|
|
|
* New targets supported
|
|
|
|
H8/300 simulator h8300-hitachi-hms or h8300hms
|
|
H8/500 simulator h8500-hitachi-hms or h8500hms
|
|
SH simulator sh-hitachi-hms or sh
|
|
Z8000 simulator z8k-zilog-none or z8ksim
|
|
IDT MIPS board over serial line mips-idt-ecoff
|
|
|
|
Cross-debugging to GO32 targets is supported. It requires a custom
|
|
version of the i386-stub.c module which is integrated with the
|
|
GO32 memory extender.
|
|
|
|
* New remote protocols
|
|
|
|
MIPS remote debugging protocol.
|
|
|
|
* New source languages supported
|
|
|
|
This version includes preliminary support for Chill, a Pascal like language
|
|
used by telecommunications companies. Chill support is also being integrated
|
|
into the GNU compiler, but we don't know when it will be publically available.
|
|
|
|
|
|
*** Changes in GDB-4.8:
|
|
|
|
* HP Precision Architecture supported
|
|
|
|
GDB now supports HP PA-RISC machines running HPUX. A preliminary
|
|
version of this support was available as a set of patches from the
|
|
University of Utah. GDB does not support debugging of programs
|
|
compiled with the HP compiler, because HP will not document their file
|
|
format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS
|
|
(as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z).
|
|
|
|
Many problems in the preliminary version have been fixed.
|
|
|
|
* Faster and better demangling
|
|
|
|
We have improved template demangling and fixed numerous bugs in the GNU style
|
|
demangler. It can now handle type modifiers such as `static' or `const'. Wide
|
|
character types (wchar_t) are now supported. Demangling of each symbol is now
|
|
only done once, and is cached when the symbol table for a file is read in.
|
|
This results in a small increase in memory usage for C programs, a moderate
|
|
increase in memory usage for C++ programs, and a fantastic speedup in
|
|
symbol lookups.
|
|
|
|
`Cfront' style demangling still doesn't work with AT&T cfront. It was written
|
|
from the specifications in the Annotated Reference Manual, which AT&T's
|
|
compiler does not actually implement.
|
|
|
|
* G++ multiple inheritance compiler problem
|
|
|
|
In the 2.3.2 release of gcc/g++, how the compiler resolves multiple
|
|
inheritance lattices was reworked to properly discover ambiguities. We
|
|
recently found an example which causes this new algorithm to fail in a
|
|
very subtle way, producing bad debug information for those classes.
|
|
The file 'gcc.patch' (in this directory) can be applied to gcc to
|
|
circumvent the problem. A future GCC release will contain a complete
|
|
fix.
|
|
|
|
The previous G++ debug info problem (mentioned below for the gdb-4.7
|
|
release) is fixed in gcc version 2.3.2.
|
|
|
|
* Improved configure script
|
|
|
|
The `configure' script will now attempt to guess your system type if
|
|
you don't supply a host system type. The old scheme of supplying a
|
|
host system triplet is preferable over using this. All the magic is
|
|
done in the new `config.guess' script. Examine it for details.
|
|
|
|
We have also brought our configure script much more in line with the FSF's
|
|
version. It now supports the --with-xxx options. In particular,
|
|
`--with-minimal-bfd' can be used to make the GDB binary image smaller.
|
|
The resulting GDB will not be able to read arbitrary object file formats --
|
|
only the format ``expected'' to be used on the configured target system.
|
|
We hope to make this the default in a future release.
|
|
|
|
* Documentation improvements
|
|
|
|
There's new internal documentation on how to modify GDB, and how to
|
|
produce clean changes to the code. We implore people to read it
|
|
before submitting changes.
|
|
|
|
The GDB manual uses new, sexy Texinfo conditionals, rather than arcane
|
|
M4 macros. The new texinfo.tex is provided in this release. Pre-built
|
|
`info' files are also provided. To build `info' files from scratch,
|
|
you will need the latest `makeinfo' release, which will be available in
|
|
a future texinfo-X.Y release.
|
|
|
|
*NOTE* The new texinfo.tex can cause old versions of TeX to hang.
|
|
We're not sure exactly which versions have this problem, but it has
|
|
been seen in 3.0. We highly recommend upgrading to TeX version 3.141
|
|
or better. If that isn't possible, there is a patch in
|
|
`texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work
|
|
around this problem.
|
|
|
|
* New features
|
|
|
|
GDB now supports array constants that can be used in expressions typed in by
|
|
the user. The syntax is `{element, element, ...}'. Ie: you can now type
|
|
`print {1, 2, 3}', and it will build up an array in memory malloc'd in
|
|
the target program.
|
|
|
|
The new directory `gdb/sparclite' contains a program that demonstrates
|
|
how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor.
|
|
|
|
* New native hosts supported
|
|
|
|
HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux
|
|
386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4
|
|
|
|
* New targets supported
|
|
|
|
AMD 29k family via UDI a29k-amd-udi or udi29k
|
|
|
|
* New file formats supported
|
|
|
|
BFD now supports reading HP/PA-RISC executables (SOM file format?),
|
|
HPUX core files, and SCO 3.2v2 core files.
|
|
|
|
* Major bug fixes
|
|
|
|
Attaching to processes now works again; thanks for the many bug reports.
|
|
|
|
We have also stomped on a bunch of core dumps caused by
|
|
printf_filtered("%s") problems.
|
|
|
|
We eliminated a copyright problem on the rpc and ptrace header files
|
|
for VxWorks, which was discovered at the last minute during the 4.7
|
|
release. You should now be able to build a VxWorks GDB.
|
|
|
|
You can now interrupt gdb while an attached process is running. This
|
|
will cause the attached process to stop, and give control back to GDB.
|
|
|
|
We fixed problems caused by using too many file descriptors
|
|
for reading symbols from object files and libraries. This was
|
|
especially a problem for programs that used many (~100) shared
|
|
libraries.
|
|
|
|
The `step' command now only enters a subroutine if there is line number
|
|
information for the subroutine. Otherwise it acts like the `next'
|
|
command. Previously, `step' would enter subroutines if there was
|
|
any debugging information about the routine. This avoids problems
|
|
when using `cc -g1' on MIPS machines.
|
|
|
|
* Internal improvements
|
|
|
|
GDB's internal interfaces have been improved to make it easier to support
|
|
debugging of multiple languages in the future.
|
|
|
|
GDB now uses a common structure for symbol information internally.
|
|
Minimal symbols (derived from linkage symbols in object files), partial
|
|
symbols (from a quick scan of debug information), and full symbols
|
|
contain a common subset of information, making it easier to write
|
|
shared code that handles any of them.
|
|
|
|
* New command line options
|
|
|
|
We now accept --silent as an alias for --quiet.
|
|
|
|
* Mmalloc licensing
|
|
|
|
The memory-mapped-malloc library is now licensed under the GNU Library
|
|
General Public License.
|
|
|
|
*** Changes in GDB-4.7:
|
|
|
|
* Host/native/target split
|
|
|
|
GDB has had some major internal surgery to untangle the support for
|
|
hosts and remote targets. Now, when you configure GDB for a remote
|
|
target, it will no longer load in all of the support for debugging
|
|
local programs on the host. When fully completed and tested, this will
|
|
ensure that arbitrary host/target combinations are possible.
|
|
|
|
The primary conceptual shift is to separate the non-portable code in
|
|
GDB into three categories. Host specific code is required any time GDB
|
|
is compiled on that host, regardless of the target. Target specific
|
|
code relates to the peculiarities of the target, but can be compiled on
|
|
any host. Native specific code is everything else: it can only be
|
|
built when the host and target are the same system. Child process
|
|
handling and core file support are two common `native' examples.
|
|
|
|
GDB's use of /proc for controlling Unix child processes is now cleaner.
|
|
It has been split out into a single module under the `target_ops' vector,
|
|
plus two native-dependent functions for each system that uses /proc.
|
|
|
|
* New hosts supported
|
|
|
|
HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd
|
|
386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
|
|
386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco
|
|
|
|
* New targets supported
|
|
|
|
Fujitsu SPARClite sparclite-fujitsu-none or sparclite
|
|
68030 and CPU32 m68030-*-*, m68332-*-*
|
|
|
|
* New native hosts supported
|
|
|
|
386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
|
|
(386bsd is not well tested yet)
|
|
386 CPUs running SCO Unix i386-unknown-scosysv322 or sco
|
|
|
|
* New file formats supported
|
|
|
|
BFD now supports COFF files for the Zilog Z8000 microprocessor. It
|
|
supports reading of `a.out.adobe' object files, which are an a.out
|
|
format extended with minimal information about multiple sections.
|
|
|
|
* New commands
|
|
|
|
`show copying' is the same as the old `info copying'.
|
|
`show warranty' is the same as `info warrantee'.
|
|
These were renamed for consistency. The old commands continue to work.
|
|
|
|
`info handle' is a new alias for `info signals'.
|
|
|
|
You can now define pre-command hooks, which attach arbitrary command
|
|
scripts to any command. The commands in the hook will be executed
|
|
prior to the user's command. You can also create a hook which will be
|
|
executed whenever the program stops. See gdb.texinfo.
|
|
|
|
* C++ improvements
|
|
|
|
We now deal with Cfront style name mangling, and can even extract type
|
|
info from mangled symbols. GDB can automatically figure out which
|
|
symbol mangling style your C++ compiler uses.
|
|
|
|
Calling of methods and virtual functions has been improved as well.
|
|
|
|
* Major bug fixes
|
|
|
|
The crash that occured when debugging Sun Ansi-C compiled binaries is
|
|
fixed. This was due to mishandling of the extra N_SO stabs output
|
|
by the compiler.
|
|
|
|
We also finally got Ultrix 4.2 running in house, and fixed core file
|
|
support, with help from a dozen people on the net.
|
|
|
|
John M. Farrell discovered that the reason that single-stepping was so
|
|
slow on all of the Mips based platforms (primarily SGI and DEC) was
|
|
that we were trying to demangle and lookup a symbol used for internal
|
|
purposes on every instruction that was being stepped through. Changing
|
|
the name of that symbol so that it couldn't be mistaken for a C++
|
|
mangled symbol sped things up a great deal.
|
|
|
|
Rich Pixley sped up symbol lookups in general by getting much smarter
|
|
about when C++ symbol mangling is necessary. This should make symbol
|
|
completion (TAB on the command line) much faster. It's not as fast as
|
|
we'd like, but it's significantly faster than gdb-4.6.
|
|
|
|
* AMD 29k support
|
|
|
|
A new user controllable variable 'call_scratch_address' can
|
|
specify the location of a scratch area to be used when GDB
|
|
calls a function in the target. This is necessary because the
|
|
usual method of putting the scratch area on the stack does not work
|
|
in systems that have separate instruction and data spaces.
|
|
|
|
We integrated changes to support the 29k UDI (Universal Debugger
|
|
Interface), but discovered at the last minute that we didn't have all
|
|
of the appropriate copyright paperwork. We are working with AMD to
|
|
resolve this, and hope to have it available soon.
|
|
|
|
* Remote interfaces
|
|
|
|
We have sped up the remote serial line protocol, especially for targets
|
|
with lots of registers. It now supports a new `expedited status' ('T')
|
|
message which can be used in place of the existing 'S' status message.
|
|
This allows the remote stub to send only the registers that GDB
|
|
needs to make a quick decision about single-stepping or conditional
|
|
breakpoints, eliminating the need to fetch the entire register set for
|
|
each instruction being stepped through.
|
|
|
|
The GDB remote serial protocol now implements a write-through cache for
|
|
registers, only re-reading the registers if the target has run.
|
|
|
|
There is also a new remote serial stub for SPARC processors. You can
|
|
find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the
|
|
Fujitsu SPARClite processor, but will run on any stand-alone SPARC
|
|
processor with a serial port.
|
|
|
|
* Configuration
|
|
|
|
Configure.in files have become much easier to read and modify. A new
|
|
`table driven' format makes it more obvious what configurations are
|
|
supported, and what files each one uses.
|
|
|
|
* Library changes
|
|
|
|
There is a new opcodes library which will eventually contain all of the
|
|
disassembly routines and opcode tables. At present, it only contains
|
|
Sparc and Z8000 routines. This will allow the assembler, debugger, and
|
|
disassembler (binutils/objdump) to share these routines.
|
|
|
|
The libiberty library is now copylefted under the GNU Library General
|
|
Public License. This allows more liberal use, and was done so libg++
|
|
can use it. This makes no difference to GDB, since the Library License
|
|
grants all the rights from the General Public License.
|
|
|
|
* Documentation
|
|
|
|
The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete
|
|
reference to the stabs symbol info used by the debugger. It is (as far
|
|
as we know) the only published document on this fascinating topic. We
|
|
encourage you to read it, compare it to the stabs information on your
|
|
system, and send improvements on the document in general (to
|
|
bug-gdb@prep.ai.mit.edu).
|
|
|
|
And, of course, many bugs have been fixed.
|
|
|
|
|
|
*** Changes in GDB-4.6:
|
|
|
|
* Better support for C++ function names
|
|
|
|
GDB now accepts as input the "demangled form" of C++ overloaded function
|
|
names and member function names, and can do command completion on such names
|
|
(using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of
|
|
single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'.
|
|
Make use of command completion, it is your friend.
|
|
|
|
GDB also now accepts a variety of C++ mangled symbol formats. They are
|
|
the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style.
|
|
You can tell GDB which format to use by doing a 'set demangle-style {gnu,
|
|
lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo'
|
|
for the list of formats.
|
|
|
|
* G++ symbol mangling problem
|
|
|
|
Recent versions of gcc have a bug in how they emit debugging information for
|
|
C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this
|
|
directory) can be applied to gcc to fix the problem. Alternatively, if you
|
|
can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The
|
|
usual symptom is difficulty with setting breakpoints on methods. GDB complains
|
|
about the method being non-existent. (We believe that version 2.2.2 of GCC has
|
|
this problem.)
|
|
|
|
* New 'maintenance' command
|
|
|
|
All of the commands related to hacking GDB internals have been moved out of
|
|
the main command set, and now live behind the 'maintenance' command. This
|
|
can also be abbreviated as 'mt'. The following changes were made:
|
|
|
|
dump-me -> maintenance dump-me
|
|
info all-breakpoints -> maintenance info breakpoints
|
|
printmsyms -> maintenance print msyms
|
|
printobjfiles -> maintenance print objfiles
|
|
printpsyms -> maintenance print psymbols
|
|
printsyms -> maintenance print symbols
|
|
|
|
The following commands are new:
|
|
|
|
maintenance demangle Call internal GDB demangler routine to
|
|
demangle a C++ link name and prints the result.
|
|
maintenance print type Print a type chain for a given symbol
|
|
|
|
* Change to .gdbinit file processing
|
|
|
|
We now read the $HOME/.gdbinit file before processing the argv arguments
|
|
(e.g. reading symbol files or core files). This allows global parameters to
|
|
be set, which will apply during the symbol reading. The ./.gdbinit is still
|
|
read after argv processing.
|
|
|
|
* New hosts supported
|
|
|
|
Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2
|
|
|
|
GNU/Linux support i386-unknown-linux or linux
|
|
|
|
We are also including code to support the HP/PA running BSD and HPUX. This
|
|
is almost guaranteed not to work, as we didn't have time to test or build it
|
|
for this release. We are including it so that the more adventurous (or
|
|
masochistic) of you can play with it. We also had major problems with the
|
|
fact that the compiler that we got from HP doesn't support the -g option.
|
|
It costs extra.
|
|
|
|
* New targets supported
|
|
|
|
Hitachi H8/300 h8300-hitachi-hms or h8300hms
|
|
|
|
* More smarts about finding #include files
|
|
|
|
GDB now remembers the compilation directory for all include files, and for
|
|
all files from which C is generated (like yacc and lex sources). This
|
|
greatly improves GDB's ability to find yacc/lex sources, and include files,
|
|
especially if you are debugging your program from a directory different from
|
|
the one that contains your sources.
|
|
|
|
We also fixed a bug which caused difficulty with listing and setting
|
|
breakpoints in include files which contain C code. (In the past, you had to
|
|
try twice in order to list an include file that you hadn't looked at before.)
|
|
|
|
* Interesting infernals change
|
|
|
|
GDB now deals with arbitrary numbers of sections, where the symbols for each
|
|
section must be relocated relative to that section's landing place in the
|
|
target's address space. This work was needed to support ELF with embedded
|
|
stabs used by Solaris-2.0.
|
|
|
|
* Bug fixes (of course!)
|
|
|
|
There have been loads of fixes for the following things:
|
|
mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k,
|
|
i960, stabs, DOS(GO32), procfs, etc...
|
|
|
|
See the ChangeLog for details.
|
|
|
|
*** Changes in GDB-4.5:
|
|
|
|
* New machines supported (host and target)
|
|
|
|
IBM RS6000 running AIX rs6000-ibm-aix or rs6000
|
|
|
|
SGI Irix-4.x mips-sgi-irix4 or iris4
|
|
|
|
* New malloc package
|
|
|
|
GDB now uses a new memory manager called mmalloc, based on gmalloc.
|
|
Mmalloc is capable of handling mutiple heaps of memory. It is also
|
|
capable of saving a heap to a file, and then mapping it back in later.
|
|
This can be used to greatly speedup the startup of GDB by using a
|
|
pre-parsed symbol table which lives in a mmalloc managed heap. For
|
|
more details, please read mmalloc/mmalloc.texi.
|
|
|
|
* info proc
|
|
|
|
The 'info proc' command (SVR4 only) has been enhanced quite a bit. See
|
|
'help info proc' for details.
|
|
|
|
* MIPS ecoff symbol table format
|
|
|
|
The code that reads MIPS symbol table format is now supported on all hosts.
|
|
Thanks to MIPS for releasing the sym.h and symconst.h files to make this
|
|
possible.
|
|
|
|
* File name changes for MS-DOS
|
|
|
|
Many files in the config directories have been renamed to make it easier to
|
|
support GDB on MS-DOSe systems (which have very restrictive file name
|
|
conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32
|
|
environment) is close to working but has some remaining problems. Note
|
|
that debugging of DOS programs is not supported, due to limitations
|
|
in the ``operating system'', but it can be used to host cross-debugging.
|
|
|
|
* Cross byte order fixes
|
|
|
|
Many fixes have been made to support cross debugging of Sparc and MIPS
|
|
targets from hosts whose byte order differs.
|
|
|
|
* New -mapped and -readnow options
|
|
|
|
If memory-mapped files are available on your system through the 'mmap'
|
|
system call, you can use the -mapped option on the `file' or
|
|
`symbol-file' commands to cause GDB to write the symbols from your
|
|
program into a reusable file. If the program you are debugging is
|
|
called `/path/fred', the mapped symbol file will be `./fred.syms'.
|
|
Future GDB debugging sessions will notice the presence of this file,
|
|
and will quickly map in symbol information from it, rather than reading
|
|
the symbol table from the executable program. Using the '-mapped'
|
|
option in a GDB `file' or `symbol-file' command has the same effect as
|
|
starting GDB with the '-mapped' command-line option.
|
|
|
|
You can cause GDB to read the entire symbol table immediately by using
|
|
the '-readnow' option with any of the commands that load symbol table
|
|
information (or on the GDB command line). This makes the command
|
|
slower, but makes future operations faster.
|
|
|
|
The -mapped and -readnow options are typically combined in order to
|
|
build a `fred.syms' file that contains complete symbol information.
|
|
A simple GDB invocation to do nothing but build a `.syms' file for future
|
|
use is:
|
|
|
|
gdb -batch -nx -mapped -readnow programname
|
|
|
|
The `.syms' file is specific to the host machine on which GDB is run.
|
|
It holds an exact image of GDB's internal symbol table. It cannot be
|
|
shared across multiple host platforms.
|
|
|
|
* longjmp() handling
|
|
|
|
GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and
|
|
siglongjmp() without losing control. This feature has not yet been ported to
|
|
all systems. It currently works on many 386 platforms, all MIPS-based
|
|
platforms (SGI, DECstation, etc), and Sun3/4.
|
|
|
|
* Solaris 2.0
|
|
|
|
Preliminary work has been put in to support the new Solaris OS from Sun. At
|
|
this time, it can control and debug processes, but it is not capable of
|
|
reading symbols.
|
|
|
|
* Bug fixes
|
|
|
|
As always, many many bug fixes. The major areas were with g++, and mipsread.
|
|
People using the MIPS-based platforms should experience fewer mysterious
|
|
crashes and trashed symbol tables.
|
|
|
|
*** Changes in GDB-4.4:
|
|
|
|
* New machines supported (host and target)
|
|
|
|
SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
|
|
(except core files)
|
|
BSD Reno on Vax vax-dec-bsd
|
|
Ultrix on Vax vax-dec-ultrix
|
|
|
|
* New machines supported (target)
|
|
|
|
AMD 29000 embedded, using EBMON a29k-none-none
|
|
|
|
* C++ support
|
|
|
|
GDB continues to improve its handling of C++. `References' work better.
|
|
The demangler has also been improved, and now deals with symbols mangled as
|
|
per the Annotated C++ Reference Guide.
|
|
|
|
GDB also now handles `stabs' symbol information embedded in MIPS
|
|
`ecoff' symbol tables. Since the ecoff format was not easily
|
|
extensible to handle new languages such as C++, this appeared to be a
|
|
good way to put C++ debugging info into MIPS binaries. This option
|
|
will be supported in the GNU C compiler, version 2, when it is
|
|
released.
|
|
|
|
* New features for SVR4
|
|
|
|
GDB now handles SVR4 shared libraries, in the same fashion as SunOS
|
|
shared libraries. Debugging dynamically linked programs should present
|
|
only minor differences from debugging statically linked programs.
|
|
|
|
The `info proc' command will print out information about any process
|
|
on an SVR4 system (including the one you are debugging). At the moment,
|
|
it prints the address mappings of the process.
|
|
|
|
If you bring up GDB on another SVR4 system, please send mail to
|
|
bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any).
|
|
|
|
* Better dynamic linking support in SunOS
|
|
|
|
Reading symbols from shared libraries which contain debugging symbols
|
|
now works properly. However, there remain issues such as automatic
|
|
skipping of `transfer vector' code during function calls, which
|
|
make it harder to debug code in a shared library, than to debug the
|
|
same code linked statically.
|
|
|
|
* New Getopt
|
|
|
|
GDB is now using the latest `getopt' routines from the FSF. This
|
|
version accepts the -- prefix for options with long names. GDB will
|
|
continue to accept the old forms (-option and +option) as well.
|
|
Various single letter abbreviations for options have been explicity
|
|
added to the option table so that they won't get overshadowed in the
|
|
future by other options that begin with the same letter.
|
|
|
|
* Bugs fixed
|
|
|
|
The `cleanup_undefined_types' bug that many of you noticed has been squashed.
|
|
Many assorted bugs have been handled. Many more remain to be handled.
|
|
See the various ChangeLog files (primarily in gdb and bfd) for details.
|
|
|
|
|
|
*** Changes in GDB-4.3:
|
|
|
|
* New machines supported (host and target)
|
|
|
|
Amiga 3000 running Amix m68k-cbm-svr4 or amix
|
|
NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000
|
|
Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
|
|
|
|
* Almost SCO Unix support
|
|
|
|
We had hoped to support:
|
|
SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
|
|
(except for core file support), but we discovered very late in the release
|
|
that it has problems with process groups that render gdb unusable. Sorry
|
|
about that. I encourage people to fix it and post the fixes.
|
|
|
|
* Preliminary ELF and DWARF support
|
|
|
|
GDB can read ELF object files on System V Release 4, and can handle
|
|
debugging records for C, in DWARF format, in ELF files. This support
|
|
is preliminary. If you bring up GDB on another SVR4 system, please
|
|
send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were
|
|
reqired (if any).
|
|
|
|
* New Readline
|
|
|
|
GDB now uses the latest `readline' library. One user-visible change
|
|
is that two tabs will list possible command completions, which previously
|
|
required typing M-? (meta-question mark, or ESC ?).
|
|
|
|
* Bugs fixed
|
|
|
|
The `stepi' bug that many of you noticed has been squashed.
|
|
Many bugs in C++ have been handled. Many more remain to be handled.
|
|
See the various ChangeLog files (primarily in gdb and bfd) for details.
|
|
|
|
* State of the MIPS world (in case you wondered):
|
|
|
|
GDB can understand the symbol tables emitted by the compilers
|
|
supplied by most vendors of MIPS-based machines, including DEC. These
|
|
symbol tables are in a format that essentially nobody else uses.
|
|
|
|
Some versions of gcc come with an assembler post-processor called
|
|
mips-tfile. This program is required if you want to do source-level
|
|
debugging of gcc-compiled programs. I believe FSF does not ship
|
|
mips-tfile with gcc version 1, but it will eventually come with gcc
|
|
version 2.
|
|
|
|
Debugging of g++ output remains a problem. g++ version 1.xx does not
|
|
really support it at all. (If you're lucky, you should be able to get
|
|
line numbers and stack traces to work, but no parameters or local
|
|
variables.) With some work it should be possible to improve the
|
|
situation somewhat.
|
|
|
|
When gcc version 2 is released, you will have somewhat better luck.
|
|
However, even then you will get confusing results for inheritance and
|
|
methods.
|
|
|
|
We will eventually provide full debugging of g++ output on
|
|
DECstations. This will probably involve some kind of stabs-in-ecoff
|
|
encapulation, but the details have not been worked out yet.
|
|
|
|
|
|
*** Changes in GDB-4.2:
|
|
|
|
* Improved configuration
|
|
|
|
Only one copy of `configure' exists now, and it is not self-modifying.
|
|
Porting BFD is simpler.
|
|
|
|
* Stepping improved
|
|
|
|
The `step' and `next' commands now only stop at the first instruction
|
|
of a source line. This prevents the multiple stops that used to occur
|
|
in switch statements, for-loops, etc. `Step' continues to stop if a
|
|
function that has debugging information is called within the line.
|
|
|
|
* Bug fixing
|
|
|
|
Lots of small bugs fixed. More remain.
|
|
|
|
* New host supported (not target)
|
|
|
|
Intel 386 PC clone running Mach i386-none-mach
|
|
|
|
|
|
*** Changes in GDB-4.1:
|
|
|
|
* Multiple source language support
|
|
|
|
GDB now has internal scaffolding to handle several source languages.
|
|
It determines the type of each source file from its filename extension,
|
|
and will switch expression parsing and number formatting to match the
|
|
language of the function in the currently selected stack frame.
|
|
You can also specifically set the language to be used, with
|
|
`set language c' or `set language modula-2'.
|
|
|
|
* GDB and Modula-2
|
|
|
|
GDB now has preliminary support for the GNU Modula-2 compiler,
|
|
currently under development at the State University of New York at
|
|
Buffalo. Development of both GDB and the GNU Modula-2 compiler will
|
|
continue through the fall of 1991 and into 1992.
|
|
|
|
Other Modula-2 compilers are currently not supported, and attempting to
|
|
debug programs compiled with them will likely result in an error as the
|
|
symbol table is read. Feel free to work on it, though!
|
|
|
|
There are hooks in GDB for strict type checking and range checking,
|
|
in the `Modula-2 philosophy', but they do not currently work.
|
|
|
|
* set write on/off
|
|
|
|
GDB can now write to executable and core files (e.g. patch
|
|
a variable's value). You must turn this switch on, specify
|
|
the file ("exec foo" or "core foo"), *then* modify it, e.g.
|
|
by assigning a new value to a variable. Modifications take
|
|
effect immediately.
|
|
|
|
* Automatic SunOS shared library reading
|
|
|
|
When you run your program, GDB automatically determines where its
|
|
shared libraries (if any) have been loaded, and reads their symbols.
|
|
The `share' command is no longer needed. This also works when
|
|
examining core files.
|
|
|
|
* set listsize
|
|
|
|
You can specify the number of lines that the `list' command shows.
|
|
The default is 10.
|
|
|
|
* New machines supported (host and target)
|
|
|
|
SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris
|
|
Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news
|
|
Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3
|
|
|
|
* New hosts supported (not targets)
|
|
|
|
IBM RT/PC: romp-ibm-aix or rtpc
|
|
|
|
* New targets supported (not hosts)
|
|
|
|
AMD 29000 embedded with COFF a29k-none-coff
|
|
AMD 29000 embedded with a.out a29k-none-aout
|
|
Ultracomputer remote kernel debug a29k-nyu-kern
|
|
|
|
* New remote interfaces
|
|
|
|
AMD 29000 Adapt
|
|
AMD 29000 Minimon
|
|
|
|
|
|
*** Changes in GDB-4.0:
|
|
|
|
* New Facilities
|
|
|
|
Wide output is wrapped at good places to make the output more readable.
|
|
|
|
Gdb now supports cross-debugging from a host machine of one type to a
|
|
target machine of another type. Communication with the target system
|
|
is over serial lines. The ``target'' command handles connecting to the
|
|
remote system; the ``load'' command will download a program into the
|
|
remote system. Serial stubs for the m68k and i386 are provided. Gdb
|
|
also supports debugging of realtime processes running under VxWorks,
|
|
using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger
|
|
stub on the target system.
|
|
|
|
New CPUs supported include the AMD 29000 and Intel 960.
|
|
|
|
GDB now reads object files and symbol tables via a ``binary file''
|
|
library, which allows a single copy of GDB to debug programs of multiple
|
|
object file types such as a.out and coff.
|
|
|
|
There is now a GDB reference card in "doc/refcard.tex". (Make targets
|
|
refcard.dvi and refcard.ps are available to format it).
|
|
|
|
|
|
* Control-Variable user interface simplified
|
|
|
|
All variables that control the operation of the debugger can be set
|
|
by the ``set'' command, and displayed by the ``show'' command.
|
|
|
|
For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>.
|
|
``Show prompt'' produces the response:
|
|
Gdb's prompt is new-gdb=>.
|
|
|
|
What follows are the NEW set commands. The command ``help set'' will
|
|
print a complete list of old and new set commands. ``help set FOO''
|
|
will give a longer description of the variable FOO. ``show'' will show
|
|
all of the variable descriptions and their current settings.
|
|
|
|
confirm on/off: Enables warning questions for operations that are
|
|
hard to recover from, e.g. rerunning the program while
|
|
it is already running. Default is ON.
|
|
|
|
editing on/off: Enables EMACS style command line editing
|
|
of input. Previous lines can be recalled with
|
|
control-P, the current line can be edited with control-B,
|
|
you can search for commands with control-R, etc.
|
|
Default is ON.
|
|
|
|
history filename NAME: NAME is where the gdb command history
|
|
will be stored. The default is .gdb_history,
|
|
or the value of the environment variable
|
|
GDBHISTFILE.
|
|
|
|
history size N: The size, in commands, of the command history. The
|
|
default is 256, or the value of the environment variable
|
|
HISTSIZE.
|
|
|
|
history save on/off: If this value is set to ON, the history file will
|
|
be saved after exiting gdb. If set to OFF, the
|
|
file will not be saved. The default is OFF.
|
|
|
|
history expansion on/off: If this value is set to ON, then csh-like
|
|
history expansion will be performed on
|
|
command line input. The default is OFF.
|
|
|
|
radix N: Sets the default radix for input and output. It can be set
|
|
to 8, 10, or 16. Note that the argument to "radix" is interpreted
|
|
in the current radix, so "set radix 10" is always a no-op.
|
|
|
|
height N: This integer value is the number of lines on a page. Default
|
|
is 24, the current `stty rows'' setting, or the ``li#''
|
|
setting from the termcap entry matching the environment
|
|
variable TERM.
|
|
|
|
width N: This integer value is the number of characters on a line.
|
|
Default is 80, the current `stty cols'' setting, or the ``co#''
|
|
setting from the termcap entry matching the environment
|
|
variable TERM.
|
|
|
|
Note: ``set screensize'' is obsolete. Use ``set height'' and
|
|
``set width'' instead.
|
|
|
|
print address on/off: Print memory addresses in various command displays,
|
|
such as stack traces and structure values. Gdb looks
|
|
more ``symbolic'' if you turn this off; it looks more
|
|
``machine level'' with it on. Default is ON.
|
|
|
|
print array on/off: Prettyprint arrays. New convenient format! Default
|
|
is OFF.
|
|
|
|
print demangle on/off: Print C++ symbols in "source" form if on,
|
|
"raw" form if off.
|
|
|
|
print asm-demangle on/off: Same, for assembler level printouts
|
|
like instructions.
|
|
|
|
print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF.
|
|
|
|
|
|
* Support for Epoch Environment.
|
|
|
|
The epoch environment is a version of Emacs v18 with windowing. One
|
|
new command, ``inspect'', is identical to ``print'', except that if you
|
|
are running in the epoch environment, the value is printed in its own
|
|
window.
|
|
|
|
|
|
* Support for Shared Libraries
|
|
|
|
GDB can now debug programs and core files that use SunOS shared libraries.
|
|
Symbols from a shared library cannot be referenced
|
|
before the shared library has been linked with the program (this
|
|
happens after you type ``run'' and before the function main() is entered).
|
|
At any time after this linking (including when examining core files
|
|
from dynamically linked programs), gdb reads the symbols from each
|
|
shared library when you type the ``sharedlibrary'' command.
|
|
It can be abbreviated ``share''.
|
|
|
|
sharedlibrary REGEXP: Load shared object library symbols for files
|
|
matching a unix regular expression. No argument
|
|
indicates to load symbols for all shared libraries.
|
|
|
|
info sharedlibrary: Status of loaded shared libraries.
|
|
|
|
|
|
* Watchpoints
|
|
|
|
A watchpoint stops execution of a program whenever the value of an
|
|
expression changes. Checking for this slows down execution
|
|
tremendously whenever you are in the scope of the expression, but is
|
|
quite useful for catching tough ``bit-spreader'' or pointer misuse
|
|
problems. Some machines such as the 386 have hardware for doing this
|
|
more quickly, and future versions of gdb will use this hardware.
|
|
|
|
watch EXP: Set a watchpoint (breakpoint) for an expression.
|
|
|
|
info watchpoints: Information about your watchpoints.
|
|
|
|
delete N: Deletes watchpoint number N (same as breakpoints).
|
|
disable N: Temporarily turns off watchpoint number N (same as breakpoints).
|
|
enable N: Re-enables watchpoint number N (same as breakpoints).
|
|
|
|
|
|
* C++ multiple inheritance
|
|
|
|
When used with a GCC version 2 compiler, GDB supports multiple inheritance
|
|
for C++ programs.
|
|
|
|
* C++ exception handling
|
|
|
|
Gdb now supports limited C++ exception handling. Besides the existing
|
|
ability to breakpoint on an exception handler, gdb can breakpoint on
|
|
the raising of an exception (before the stack is peeled back to the
|
|
handler's context).
|
|
|
|
catch FOO: If there is a FOO exception handler in the dynamic scope,
|
|
set a breakpoint to catch exceptions which may be raised there.
|
|
Multiple exceptions (``catch foo bar baz'') may be caught.
|
|
|
|
info catch: Lists all exceptions which may be caught in the
|
|
current stack frame.
|
|
|
|
|
|
* Minor command changes
|
|
|
|
The command ``call func (arg, arg, ...)'' now acts like the print
|
|
command, except it does not print or save a value if the function's result
|
|
is void. This is similar to dbx usage.
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The ``up'' and ``down'' commands now always print the frame they end up
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at; ``up-silently'' and `down-silently'' can be used in scripts to change
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|
frames without printing.
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* New directory command
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'dir' now adds directories to the FRONT of the source search path.
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The path starts off empty. Source files that contain debug information
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about the directory in which they were compiled can be found even
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|
with an empty path; Sun CC and GCC include this information. If GDB can't
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find your source file in the current directory, type "dir .".
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|
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* Configuring GDB for compilation
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|
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For normal use, type ``./configure host''. See README or gdb.texinfo
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|
for more details.
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|
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GDB now handles cross debugging. If you are remotely debugging between
|
|
two different machines, type ``./configure host -target=targ''.
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|
Host is the machine where GDB will run; targ is the machine
|
|
where the program that you are debugging will run.
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