This patch renames the "set/show remotebaud" commands into
"set/show serial baud", and moves its implementation into serial.c.
It also moves the "baud_rate" global from top.c to serial.c, where
the new code is being added (the alternative was to add an include
of target.h).
And to facilitate the transition to the new setting name, this
patch also preserves the old commands, and marks them as deprecated
to alert the users of the change.
gdb/ChangeLog:
* cli/cli-cmds.c (show_baud_rate): Moved to serial.c as
serial_baud_show_cmd.
(_initialize_cli_cmds): Delete the code creating the
"set/show remotebaud" commands.
* serial.c (baud_rate): Move here from top.c.
(serial_baud_show_cmd): Move here from cli/cli-cmds.c.
(_initialize_serial): Create "set/show serial baud" commands.
Add "set/show remotebaud" command aliases.
* top.c (baud_rate): Moved to serial.c.
* NEWS: Document the new "set/show serial baud" commands,
replacing "set/show remotebaud".
gdb/doc/ChangeLog:
* gdb.texinfo: Replace "set remotebaud" and "show remotebaud"
by "set serial baud" and "show serial baud" (resp) throughout.
will hold the signal number when the inferior terminates due to the
uncaught signal.
I've made modifications on infrun.c:handle_inferior_event such that
$_exitcode gets cleared when the inferior signalled, and vice-versa.
This assumption was made because the variables are mutually
exclusive, i.e., when the inferior terminates because of an uncaught
signal it is not possible for it to return. I have also made modifications
such that when a corefile is loaded, $_exitsignal gets set to the uncaught
signal that "killed" the inferior, and $_exitcode is cleared.
The patch also adds a NEWS entry, documentation bits, and a testcase. The
documentation entry explains how to use $_exitsignal and $_exitcode in a
GDB script, by making use of the new $_isvoid convenience function.
gdb/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* NEWS: Mention new convenience variable $_exitsignal.
* corelow.c (core_open): Reset exit convenience variables. Set
$_exitsignal to the uncaught signal which generated the corefile.
* infrun.c (handle_inferior_event): Reset exit convenience
variables. Set $_exitsignal for TARGET_WAITKIND_SIGNALLED.
(clear_exit_convenience_vars): New function.
* inferior.h (clear_exit_convenience_vars): New prototype.
gdb/testsuite/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.base/corefile.exp: Test whether $_exitsignal is set and
$_exitcode is void when opening a corefile.
* gdb.base/exitsignal.exp: New file.
* gdb.base/segv.c: Likewise.
* gdb.base/normal.c: Likewise.
gdb/doc/
2013-10-06 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.texinfo (Convenience Variables): Document $_exitsignal.
Update entry for $_exitcode.
* NEWS: Mention support for DWP file format version 2.
* dwarf2read.c (dwarf2_section_info): Convert asection field to a
union of asection, containing_section. New fields virtual_offset
and is_virtual. Change type of readin filed from int to char.
(dwo_sections, dwo_file): Tweak comments.
(dwp_v2_section_ids): New enum.
(dwp_sections): New fields abbrev, info, line, loc, macinfo, macro,
str_offsets, types.
(virtual_v1_dwo_sections): Renamed from virtual_dwo_sections.
All uses updated.
(virtual_v2_dwo_sections): New struct.
(dwp_hash_table): New fields version, nr_columns. Change type of
section_pool field to a union.
(dwp_file): New field version.
(dwarf2_has_info): Check for virtual sections.
(get_containing_section): New function.
(get_section_bfd_owner, get_section_bfd_section): Call it.
(dwarf2_locate_sections): Update.
(dwarf2_section_empty_p): Update.
(dwarf2_read_section): Handle virtual sections.
(locate_dwz_sections): Update.
(create_dwp_hash_table): Document and handle V2 format.
(locate_v1_virtual_dwo_sections): Renamed from
locate_virtual_dwo_sections and update. All callers updated.
(create_dwo_unit_in_dwp_v1): Renamed from create_dwo_in_dwp.
Delete arg htab. Rename arg section_index to unit_index.
All callers updated.
(MAX_NR_V1_DWO_SECTIONS): Renamed from MAX_NR_DWO_SECTIONS.
All uses updated.
(create_dwp_v2_section, create_dwo_unit_in_dwp_v2): New functions.
(lookup_dwo_unit_in_dwp): Add V2 support.
(dwarf2_locate_dwo_sections): Update.
(dwarf2_locate_common_dwp_sections): Renamed from
dwarf2_locate_dwp_sections and update. All callers updated.
(dwarf2_locate_v2_dwp_sections): New function.
(open_and_init_dwp_file): Add V2 support.
(read_str_index): New locals str_section, str_offsets_section.
gdb/ChangeLog:
* mi/mi-main.c (run_one_inferior): Add function description.
Make ARG a pointer to an integer whose value determines whether
we should "run" or "start" the program.
(mi_cmd_exec_run): Add handling of the "--start" option.
Reject all other command-line options.
* NEWS: Add entry for "-exec-run"'s new "--start" option.
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Program Execution): Document "-exec-run"'s
new "--start" option.
gdb/testsuite/ChangeLog:
* gdb.mi/mi-start.c, gdb.mi/mi-start.exp: New files.
Currently, in some scenarios, GDB prints <optimized out> when printing
outer frame registers. An <optimized out> register is a confusing
concept. What this really means is that the register is
call-clobbered, or IOW, not saved by the callee. This patch makes GDB
say that instead.
Before patch:
(gdb) p/x $rax $1 = <optimized out>
(gdb) info registers rax
rax <optimized out>
After patch:
(gdb) p/x $rax
$1 = <not saved>
(gdb) info registers rax
rax <not saved>
However, if for some reason the debug info describes a variable as
being in such a register (**), we still want to print <optimized out>
when printing the variable. IOW, <not saved> is reserved for
inspecting registers at the machine level. The patch uses
lval_register+optimized_out to encode the not saved registers, and
makes it so that optimized out variables always end up in
!lval_register values.
** See <https://sourceware.org/ml/gdb-patches/2012-08/msg00787.html>.
Current/recent enough GCC doesn't mark variables/arguments as being in
call-clobbered registers in the ranges corresponding to function
calls, while older GCCs did. Newer GCCs will just not say where the
variable is, so GDB will end up realizing the variable is optimized
out.
frame_unwind_got_optimized creates not_lval optimized out registers,
so by default, in most cases, we'll see <optimized out>.
value_of_register is the function eval.c uses for evaluating
OP_REGISTER (again, $pc, etc.), and related bits. It isn't used for
anything else. This function makes sure to return lval_register
values. The patch makes "info registers" and the MI equivalent use it
too. I think it just makes a lot of sense, as this makes it so that
when printing machine registers ($pc, etc.), we go through a central
function.
We're likely to need a different encoding at some point, if/when we
support partially saved registers. Even then, I think
value_of_register will still be the spot to tag the intention to print
machine register values differently.
value_from_register however may also return optimized out
lval_register values, so at a couple places where we're computing a
variable's location from a dwarf expression, we convert the resulting
value away from lval_register to a regular optimized out value.
Tested on x86_64 Fedora 17
gdb/
2013-10-02 Pedro Alves <palves@redhat.com>
* cp-valprint.c (cp_print_value_fields): Adjust calls to
val_print_optimized_out.
* jv-valprint.c (java_print_value_fields): Likewise.
* p-valprint.c (pascal_object_print_value_fields): Likewise.
* dwarf2loc.c (dwarf2_evaluate_loc_desc_full)
<DWARF_VALUE_REGISTER>: If the register was not saved, return a
new optimized out value.
* findvar.c (address_from_register): Likewise.
* frame.c (put_frame_register): Tweak error string to say the
register was not saved, rather than optimized out.
* infcmd.c (default_print_one_register_info): Adjust call to
val_print_optimized_out. Use value_of_register instead of
get_frame_register_value.
* mi/mi-main.c (output_register): Use value_of_register instead of
get_frame_register_value.
* valprint.c (valprint_check_validity): Likewise.
(val_print_optimized_out): New value parameter. If the value is
lval_register, print <not saved> instead.
(value_check_printable, val_print_scalar_formatted): Adjust calls
to val_print_optimized_out.
* valprint.h (val_print_optimized_out): New value parameter.
* value.c (struct value) <optimized_out>: Extend comment.
(error_value_optimized_out): New function.
(require_not_optimized_out): Use it. Use a different string for
lval_register values.
* value.h (error_value_optimized_out): New declaration.
* NEWS: Mention <not saved>.
gdb/testsuite/
2013-10-02 Pedro Alves <palves@redhat.com>
* gdb.dwarf2/dw2-reg-undefined.exp <pattern_rax_rbx_rcx_print,
pattern_rax_rbx_rcx_info>: Set to "<not saved>".
* gdb.mi/mi-reg-undefined.exp (opt_out_pattern): Delete.
(not_saved_pattern): New.
Replace use of the former with the latter.
gdb/doc/
2013-10-02 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Registers): Expand description of saved registers
in frames. Explain <not saved>.
* NEWS: Mention "set debug symfile".
* Makefile.in (SFILES): Add symfile-debug.c.
(COMMON_OBS): Add symfile-debug.o.
* elfread.c (elf_symfile_read): Use objfile_set_sym_fns to set the
objfile's symbol functions.
* objfiles.h (objfile_set_sym_fns): Declare.
* symfile-debug.c: New file.
* symfile.c (syms_from_objfile_1): Use objfile_set_sym_fns to set the
objfile's symbol functions.
(reread_symbols): Ditto.
<https://sourceware.org/ml/gdb-patches/2013-09/msg00301.html>
<https://sourceware.org/ml/gdb-patches/2013-09/msg00383.html>
This patch adds a new convenience function called $_isvoid, whose
only purpose is to check whether an expression is void or not.
This became necessary because the new convenience variable
$_exitsignal (not yet approved) has a mutual exclusive behavior
with $_exitcode, i.e., when one is "defined" (i.e., non-void),
the other is cleared (i.e., becomes void). Doug wanted a way to
identify which variable to use, and checking for voidness is the
obvious solution.
It is worth mentioning that my first attempt, after a conversation with
Doug, was to actually implement a new $_isdefined() convenience
function. I would do that (for convenience variables) by calling
lookup_only_internalvar. However, I found a few problems:
- Whenever I called $_isdefined ($variable), $variable became defined
(with a void value), and $_isdefined always returned true.
- Then, I tried to implement $_isdefined ("variable"), and do the "$" +
"variable" inside GDB, thus making it impossible for GDB to create the
convenience variable. However, it was hard to extract the string
without having to mess with values and their idiossincrasies.
Therefore, I decided to abandon this attempt (specially because I
didn't want to spend too much time struggling with it).
Anyway, after talking to Doug again we decided that it would be easier
to implement $_isvoid, and this will probably help in cases like
<http://stackoverflow.com/questions/3744554/testing-if-a-gdb-convenience-variable-is-defined>.
I wrote a NEWS entry for it, and some new lines on the documentation.
gdb/
2013-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* NEWS: Mention new convenience function $_isvoid.
* value.c (isvoid_internal_fn): New function.
(_initialize_values): Add new convenience function $_isvoid.
gdb/doc/
2013-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.texinfo (Convenience Functions): Mention new convenience
function $_isvoid.
gdb/testsuite/
2013-09-16 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.base/gdbvars.c (foo_void): New function.
(foo_int): Likewise.
* gdb.base/gdbvars.exp (test_convenience_functions): New
function. Call it.
* NEWS: Add entry mentioning support for native Windows x64
SEH data.
* amd64-windows-tdep.c: #include "objfiles.h", "frame-unwind.h",
"coff/internal.h", "coff/i386.h", "coff/pe.h" and "libcoff.h".
(struct amd64_windows_frame_cache): New struct.
(amd64_windows_w2gdb_regnum): New global.
(pc_in_range, amd64_windows_frame_decode_epilogue)
(amd64_windows_frame_decode_insns, amd64_windows_find_unwind_info)
(amd64_windows_frame_cache, amd64_windows_frame_prev_register)
(amd64_windows_frame_this_id): New functions.
(amd64_windows_frame_unwind): New static global.
(amd64_windows_skip_prologue): New function.
(amd64_windows_init_abi): Call frame_unwind_prepend_unwinder
with amd64_windows_frame_unwind. Call set_gdbarch_skip_prologue
with amd64_windows_skip_prologue.
This is the patch to add new option '--skip-unavailable' to MI
commands '-stack-list-{locals, arguments, variables}'. This patch
extends list_args_or_locals to add a new parameter 'skip_unavailable',
and don't list locals or arguments if values are unavailable and
'skip_unavailable' is true.
This is inspecting a trace frame (tfind mode), where only a few
locals have been collected.
-stack-list-locals, no switch vs new switch:
-stack-list-locals --simple-values
^done,locals=[{name="array",type="unsigned char [2]"},{name="i",type="int",value="<unavailable>"}]
-stack-list-locals --skip-unavailable --simple-values
^done,locals=[{name="array",type="unsigned char [2]"}]
-stack-list-arguments, no switch vs new switch:
-stack-list-arguments --simple-values
^done,stack-args=[frame={level="0",args=[{name="j",type="int",value="4"},{name="s",type="char *",value="<unavailable>"}]},frame={level="1",args=[]}]
-stack-list-arguments --skip-unavailable --simple-values
^done,stack-args=[frame={level="0",args=[{name="j",type="int",value="4"}]},frame={level="1",args=[]}]
-stack-list-variables, no switch vs new switch:
-stack-list-variables --simple-values
^done,variables=[{name="j",arg="1",type="int",value="4"},{name="s",arg="1",type="char *",value="<unavailable>"},{name="array",type="unsigned char [2]"},{name="i",type="int",value="<unavailable>"}]
-stack-list-variables --skip-unavailable --simple-values
^done,variables=[{name="j",arg="1",type="int",value="4"},{name="array",type="unsigned char [2]"}]
tests are added to test these new options.
gdb:
2013-08-27 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* mi/mi-cmd-stack.c (list_args_or_locals): Adjust prototype.
(parse_no_frames_option): Remove.
(mi_cmd_stack_list_locals): Handle --skip-unavailable.
(mi_cmd_stack_list_args): Adjust.
(mi_cmd_stack_list_variables): Handle --skip-unavailable.
(list_arg_or_local): Add new parameter 'skip_unavailable'. Return
early if SKIP_UNAVAILABLE is true and ARG->val is unavailable.
Caller update.
(list_args_or_locals): New parameter 'skip_unavailable'.
Handle it.
* valprint.c (scalar_type_p): Rename to ...
(val_print_scalar_type_p): ... this. Make extern.
(val_print, value_check_printable): Adjust.
* valprint.h (val_print_scalar_type_p): Declare.
* value.c (value_entirely_unavailable): New function.
* value.h (value_entirely_unavailable): Declare.
* NEWS: Mention the new option "--skip-unavailable" to MI
commands '-stack-list-locals', '-stack-list-arguments' and
'-stack-list-variables'.
gdb/doc:
2013-08-27 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* gdb.texinfo (GDB/MI Stack Manipulation) <-stack-list-locals>:
Document new --skip-unavailable option.
<-stack-list-variables>: Document new --skip-unavailable option.
gdb/testsuite:
2013-08-27 Yao Qi <yao@codesourcery.com>
* gdb.trace/entry-values.exp: Test unavailable entry value is
not shown when option '--skip-unavailable' is specified.
* gdb.trace/mi-trace-unavailable.exp (test_trace_unavailable):
Add tests for new option '--skip-unavailable'.
* symmisc.c (maintenance_print_objfiles): Argument is now an optional
regexp of objfiles to print.
(_initialize_symmisc): Update doc string for "mt print objfiles".
doc/
* gdb.texinfo (Maintenance Commands): "maint print objfiles" now takes
an optional regexp.
This time, it passes all the tests and comes with a nearly complete
XML file (plus a script that can nearly regenerate the XML file).
(I elected to leave out __ARM_NR_cmpxchg, since it has dire warnings
to the effect that the only pieces of code that should be aware of it
are the implementation and the __kuser_cmpxchg code in entry-armv.S.)
gdb/
2013-08-14 Samuel Bronson <naesten@gmail.com>
ARM Linux support for `catch syscall'.
* syscalls/arm-linux.py: New file.
* syscalls/arm-linux.xml: Likewise.
* arm-linux-tdep.c (arm_linux_get_syscall_number): New function.
(arm_linux_init_abi): Register the new function and syscall xml file.
* data-directory/Makefile.in: Install the new syscall xml file.
* NEWS: Brag about this.
gdb/testsuite/
2013-08-14 Samuel Bronson <naesten@gmail.com>
ARM Linux support for `catch syscall'.
* gdb.base/catch-syscall.exp: Test this on ARM now.
(fill_all_syscalls_numbers): ARM has close/chroot on 6/61, too.
* Makefile.in (SFILES): Add common/mips-linux-watch.c.
(mips-linux-watch.o): New rule.
(mips_linux_watch_h): New variable.
* configure.srv <mips*-*-linux*>: Add mips-linux-watch.o to
srv_tgtobj.
* linux-mips-low.c: Include mips-linux-watch.h.
(struct arch_process_info, struct arch_lwp_info): New.
(update_watch_registers_callback): New function.
(mips_linux_new_process, mips_linux_new_thread) New functions.
(mips_linux_prepare_to_resume, mips_insert_point): New
functions.
(mips_remove_point, mips_stopped_by_watchpoint): New
functions.
(rsp_bp_type_to_target_hw_bp_type): New function.
(mips_stopped_data_address): New function.
(the_low_target): Add watchpoint support functions.
gdb/
* NEWS: Mention that GDBserver now supports hardware
watchpoints on the MIPS GNU/Linux target.
http://sourceware.org/ml/gdb-patches/2013-07/msg00235.html
gdb/ChangeLog
* NEWS: Mention new 'z' formatter.
* printcmd.c (print_scalar_formatted): Add new 'z' formatter.
(_initialize_printcmd): Mention 'z' formatter in help text of the
'x' command.
gdb/doc/ChangeLog
* gdb.texinfo (Output Formats): Mention the new 'z' formatter.
gdb/testsuite/ChangeLog
* gdb.base/printcmds.exp (test_print_int_arrays): Add tests for x,
z, o, and t output formats.
* gdb.base/display.exp: Use 'k' as an undefined format now that
'z' is defined.
2013-06-26 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* gdb.texinfo (GDB/MI Tracepoint Commands): Document
-trace-frame-collected.
gdb:
2013-06-26 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* mi/mi-cmds.c (mi_cmds): Register -trace-frame-collected.
* mi/mi-cmds.h (mi_cmd_trace_frame_collected): Declare.
* mi/mi-main.c (print_variable_or_computed): New function.
(mi_cmd_trace_frame_collected): New function.
* tracepoint.c (find_trace_state_variable_by_number): New.
(struct traceframe_info): Move to tracepoint.h
(struct collection_list): Likewise.
(do_collect_symbol): Include locals and arguments in the wholly
collected variables list.
(clear_collection_list): Clear wholly collected variables list
and computed variables list.
(append_exp): New function.
(encode_actions_1): Include variables in the wholly
collected variables list. Include memory ranges and
full-fledged expressions in the computed expressions list.
(encode_actions): Move some code to ...
Return the cleanup chain.
(encode_actions_rsp): ... here. New function.
(get_traceframe_location, get_traceframe_info): Remove static.
* tracepoint.h (struct memrange): Moved from tracepoint.c.
(struct collection_list): Moved from tracepoint.c. Add two
new fields 'wholly_collected' and 'computed'.
(find_trace_state_variable_by_number): Declare.
(encode_actions): Adjust declaration.
(encode_actions_rsp): Declare.
(get_traceframe_info, get_traceframe_location): Declare.
* NEWS: Mention new MI command -trace-frame-collected.
2013-06-26 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* ctf.c (ctf_traceframe_info): Push trace state variables
present in the trace data into the traceframe info object.
* breakpoint.c (DEF_VEC_I): Remove.
* common/filestuff.c (DEF_VEC_I): Likewise.
* dwarf2loc.c (DEF_VEC_I): Likewise.
* mi/mi-main.c (DEF_VEC_I): Likewise.
* common/gdb_vecs.h (DEF_VEC_I): Define vector for int.
* features/traceframe-info.dtd: Add tvar element and its
attributes.
* tracepoint.c (free_traceframe_info): Free vector 'tvars'.
(build_traceframe_info): Push trace state variables present in the
trace data into the traceframe info object.
(traceframe_info_start_tvar): New function.
(tvar_attributes): New.
(traceframe_info_children): Add "tvar" element.
* tracepoint.h (struct traceframe_info) <tvars>: New field.
* NEWS: Mention the change in GDB and GDBserver.
gdb/doc:
2013-06-26 Pedro Alves <pedro@codesourcery.com>
* gdb.texinfo (Traceframe Info Format): Document tvar element and
its attributes.
gdb/gdbserver:
2013-06-26 Pedro Alves <pedro@codesourcery.com>
* tracepoint.c (build_traceframe_info_xml): Output trace state
variables present in the trace buffer.
This patch adds an option --skip-unavailable to MI command
-data-list-register-values, so that unavailable registers are not
displayed (on the context of traceframes).
The old -data-list-register-values command behaves like
-data-list-register-values x 0 8
^done,register-values=[{number="0",value="<unavailable>"},{number="8",value="0x80483de"}]
With this patch, an option --skip-unavailable is added,
-data-list-register-values --skip-unavailable x 0 8
^done,register-values=[{number="8",value="0x80483de"}]
gdb:
2013-06-20 Pedro Alves <pedro@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* NEWS: Mention the new option '--skip-unavailable' of command
-data-list-register-values.
* mi/mi-main.c (mi_cmd_data_list_register_values): Accept the
--skip-unavailable option. Adjust to use output_register.
(output_register): Add new 'skip_unavailable' parameter.
Handle it.
gdb/doc:
2013-06-20 Pedro Alves <pedro@codesourcery.com>
* gdb.texinfo (GDB/MI Data Manipulation)
<-data-list-register-values>: Document the --skip-unavailable
option.
gdb/testsuite:
2013-06-20 Yao Qi <yao@codesourcery.com>
* gdb.trace/mi-trace-unavailable.exp: Set tracepoint on 'foo'
and set an action.
(test_trace_unavailable): Test command -data-list-register-values
in the context of traceframe and with option --skip-unavailable.
* gdb.trace/trace-unavailable.c (foo): New.
(main): Call it.
* gdb.mi/gdb2549.exp: Update matching pattern.
This patch adds support for range stepping to GDBserver, teaching it
about vCont;r.
It'd be easy to enable this for all hardware single-step targets
without needing the linux_target_ops hook, however, at least PPC needs
special care, due to the fact that PPC atomic sequences can't be
hardware single-stepped through, a thing which GDBserver doesn't know
about. So this leaves the support limited to x86/x86_64.
gdb/
2013-05-23 Pedro Alves <palves@redhat.com>
* NEWS: Mention GDBserver range stepping support.
gdb/gdbserver/
2013-05-23 Yao Qi <yao@codesourcery.com>
Pedro Alves <palves@redhat.com>
* linux-low.c (lwp_in_step_range): New function.
(linux_wait_1): If the thread was range stepping and stopped
outside the stepping range, report the stop to GDB. Otherwise,
continue stepping. Add range stepping debug output.
(linux_set_resume_request): Copy the step range from the resume
request to the lwp.
(linux_supports_range_stepping): New.
(linux_target_ops) <supports_range_stepping>: Set to
linux_supports_range_stepping.
* linux-low.h (struct linux_target_ops)
<supports_range_stepping>: New field.
(struct lwp_info) <step_range_start, step_range_end>: New fields.
* linux-x86-low.c (x86_supports_range_stepping): New.
(the_low_target) <supports_range_stepping>: Set to
x86_supports_range_stepping.
* server.c (handle_v_cont): Handle 'r' action.
(handle_v_requests): Append ";r" if the target supports range
stepping.
* target.h (struct thread_resume) <step_range_start,
step_range_end>: New fields.
(struct target_ops) <supports_range_stepping>:
New field.
(target_supports_range_stepping): New macro.
This patch teaches GDB to take advantage of target-assisted range
stepping. It adds a new 'r ADDR1,ADDR2' action to vCont (vCont;r),
meaning, "step once, and keep stepping as long as the thread is in the
[ADDR1,ADDR2) range".
Rationale:
When user issues the "step" command on the following line of source,
a = b + c + d * e - a;
GDB single-steps every single instruction until the program reaches a
new different line. E.g., on x86_64, that line compiles to:
0x08048434 <+65>: mov 0x1c(%esp),%eax
0x08048438 <+69>: mov 0x30(%esp),%edx
0x0804843c <+73>: add %eax,%edx
0x0804843e <+75>: mov 0x18(%esp),%eax
0x08048442 <+79>: imul 0x2c(%esp),%eax
0x08048447 <+84>: add %edx,%eax
0x08048449 <+86>: sub 0x34(%esp),%eax
0x0804844d <+90>: mov %eax,0x34(%esp)
0x08048451 <+94>: mov 0x1c(%esp),%eax
and the following is the RSP traffic between GDB and GDBserver:
--> vCont;s:p2e13.2e13;c
<-- T0505:68efffbf;04:30efffbf;08:3c840408;thread:p2e13.2e13;core:1;
--> vCont;s:p2e13.2e13;c
<-- T0505:68efffbf;04:30efffbf;08:3e840408;thread:p2e13.2e13;core:2;
--> vCont;s:p2e13.2e13;c
<-- T0505:68efffbf;04:30efffbf;08:42840408;thread:p2e13.2e13;core:2;
--> vCont;s:p2e13.2e13;c
<-- T0505:68efffbf;04:30efffbf;08:47840408;thread:p2e13.2e13;core:0;
--> vCont;s:p2e13.2e13;c
<-- T0505:68efffbf;04:30efffbf;08:49840408;thread:p2e13.2e13;core:0;
--> vCont;s:p2e13.2e13;c
<-- T0505:68efffbf;04:30efffbf;08:4d840408;thread:p2e13.2e13;core:0;
--> vCont;s:p2e13.2e13;c
<-- T0505:68efffbf;04:30efffbf;08:51840408;thread:p2e13.2e13;core:0;
IOW, a lot of roundtrips between GDB and GDBserver.
If we add a new command to the RSP, meaning "keep stepping and don't
report a stop until the program goes out of the [0x08048434,
0x08048451) address range", then the RSP traffic can be reduced down
to:
--> vCont;r8048434,8048451:p2db0.2db0;c
<-- T0505:68efffbf;04:30efffbf;08:51840408;thread:p2db0.2db0;core:1;
As number of packets is reduced dramatically, the performance of
stepping source lines is much improved.
In case something is wrong with range stepping on the stub side, the
debug info or even gdb, this adds a "set/show range-stepping" command
to be able to turn range stepping off.
gdb/
2013-05-23 Yao Qi <yao@codesourcery.com>
Pedro Alves <palves@redhat.com>
* gdbthread.h (struct thread_control_state) <may_range_step>: New
field.
* infcmd.c (step_once, until_next_command): Enable range stepping.
* infrun.c (displaced_step_prepare): Disable range stepping.
(resume): Disable range stepping if stepping over a breakpoint or
we have software watchpoints. If range stepping is enabled,
assert the thread is in the stepping range.
(clear_proceed_status_thread): Clear may_range_step.
(handle_inferior_event): Disable range stepping as soon as we know
the thread that hit the event. Re-enable it whenever we're going
to step with a step range.
* remote.c (struct vCont_action_support) <r>: New field.
(use_range_stepping): New global.
(remote_vcont_probe): Handle 'r' action.
(append_resumption): Append an 'r' action if the thread may range
step.
(show_range_stepping): New function.
(set_range_stepping): New function.
(_initialize_remote): Call add_setshow_boolean_cmd to register the
'set range-stepping' and 'show range-stepping' commands.
* NEWS: Mention range stepping, the new vCont;r action, and the
new "set/show range-stepping" commands.
gdb/doc/
2013-05-23 Yao Qi <yao@codesourcery.com>
Pedro Alves <palves@redhat.com>
* gdb.texinfo (Packets): Document 'vCont;r'.
(Continuing and Stepping): Document target-assisted range
stepping, and the 'set range-stepping' and 'show range-stepping'
commands.
gdb/doc/ChangeLog:
* gdb.texinfo (Installed System-wide Configuration Scripts):
Add subsection describing the scripts now available under
the data-dir's system-gdbbinit subdirectory.
* NEWS: Add entry announcing the availability of system-wide
configuration scripts for ElinOS and Wind River Linux.
expand-symtabs, and renamed check-psymtabs.
* psymtab.c (maintenance_check_psymtabs): Renamed from
maintenance_check_symtabs. Only process already-expanded symbol
tables.
(_initialize_psymtab): Update.
* symmisc.c (maintenance_check_symtabs): New function.
(maintenance_expand_name_matcher): New function
(maintenance_expand_file_matcher): New function
(maintenance_expand_symtabs): New function.
(_initialize_symmisc): Add "mt check-symtabs" and "mt expand-symtabs"
commands.
doc/
* gdb.texinfo (Maintenance Commands): Update doc for
"maint check-psymtabs". Add doc for "maint check-symtabs",
"maint expand-symtabs".
testsuite/
* gdb.base/maint.exp: Update test for "maint check-psymtabs".
Add tests for "maint check-symtabs", "maint expand-symtabs".
Andrew Jenner <andrew@codesourcery.com>
Chung-Lin Tang <cltang@codesourcery.com>
Julian Brown <julian@codesourcery.com>
Based on the nios2-elf port from Altera Corporation.
gdb/
* Makefile.in (ALL_TARGET_OBS): Add nios2-tdep.o and
nios2-linux-tdep.o.
(HFILES_NO_SRCDIR): Add nios2-tdep.h.
(ALLDEPFILES): Add nios2-tdep.c and nios2-linux-tdep.c.
* configure.tgt: Add nios2*-*-linux* and nios2*-*-* targets.
* nios2-tdep.h: New.
* nios2-tdep.c: New.
* nios2-linux-tdep.c: New.
* features/Makefile (WHICH): Add nios2-linux.
(nios2-linux-expedite): Set.
* features/nios2-cpu.xml: New.
* features/nios2.xml: New.
* features/nios2-linux.xml: New.
* features/nios2.c: New (autogenerated).
* features/nios2-linux.c: New (autogenerated).
* regformats/nios2-linux.dat: New (autogenerated).
* NEWS (Changes since GDB 7.6): Add new Nios II targets
and commands.
gdb/doc/
* gdb.texinfo (Nios II): New section.
(Nios II Features): New section.
Mention "set foo unlimited" in NEWS, right below the "New options"
section.
2013-04-16 Pedro Alves <palves@redhat.com>
Eli Zaretskii <eliz@gnu.org>
* NEWS: Mention "set foo unlimited".
2013-04-10 Hui Zhu <hui@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* configure.ac: Check libbabeltrace is installed.
* config.in: Regenerate.
* configure: Regenerate.
* Makefile.in (LIBBABELTRACE): New.
(CLIBS): Add LIBBABELTRACE.
* ctf.c: Include "exec.h".
(CTF_EVENT_ID_STATUS, CTF_EVENT_ID_TSV_DEF): New macros.
(CTF_EVENT_ID_TP_DEF, ctf_save_write_int32): New macros.
(ctf_save_metadata_header): Define new type aliases in
metadata.
(ctf_write_header): Define event type "tsv_def" and "tp_def"
in metadata. Start a new faked packet for trace status.
(ctf_write_status): Write trace status to CTF.
(ctf_write_uploaded_tsv): Write TSV to CTF.
(ctf_write_uploaded_tp): Write tracepoint definition to CTF.
(ctf_write_definition_end): End the faked packet.
(ctx, ctf_iter, trace_dirname): New.
(start_pos): New variable.
(ctf_destroy, ctf_open_dir, ctf_open): New.
(SET_INT32_FIELD, SET_ARRAY_FIELD, SET_STRING_FIELD): New
macros.
(ctf_read_tsv, ctf_read_tp, ctf_close, ctf_files_info): New.
(ctf_fetch_registers, ctf_xfer_partial): New.
(ctf_get_trace_state_variable_value): New.
(ctf_get_tpnum_from_frame_event): New.
(ctf_get_traceframe_address): New.
(ctf_trace_find, ctf_has_stack): New.
(ctf_has_registers, ctf_traceframe_info, init_ctf_ops): New.
(ctf_get_trace_status, ctf_read_status): New.
(_initialize_ctf): New.
* tracepoint.c (get_tracepoint_number): New
(get_uploaded_tsv): Remove 'static'.
(struct traceframe_info, trace_regblock_size): Move it to ...
* tracepoint.h: ... here.
(get_tracepoint_number): Declare it.
(get_uploaded_tsv): Declare it.
* NEWS: Mention new configure option.
gdb/doc/
2013-04-10 Yao Qi <yao@codesourcery.com>
* gdb.texinfo (Trace Files): Add "target ctf".
gdb/testsuite/
2013-04-10 Yao Qi <yao@codesourcery.com>
* gdb.trace/actions.exp: Save trace data to CTF.
Change to ctf target if GDB supports, read CTF data in ctf
target, and check the actions of tracepoints.
* gdb.trace/while-stepping.exp: Likewise.
* gdb.trace/report.exp: Test GDB saves trace data to CTF
format and read CTF trace file if GDB supports.
* gdb.trace/tstatus.exp: Save trace data to CTF. If ctf
target is supported, change to ctf target, read trace data and
check output of command "tstatus".
* gdb.trace/tsv.exp: Save trace frame to CTF. If GDB supports,
read CTF data by target ctf and call check_tsv.
x86_64/Cygwin is only mentioned as a new target, but we gained support
for building a native x86_64/Cygwin debugger too.
gdb/
2013-04-03 Pedro Alves <palves@redhat.com>
* NEWS: Mention x86_64/Cygwin as new native configuration.
I hacked "apropos" to dump the whole set of commands (just make it
accept the entry string as regex), and then diffed the output of 7.5
vs 7.6, --enable-targets=all builds. That allowed then checking
whether some commands had not been mentioned in NEWS or the manual.
These are what I found missing. We've been a bit negligent in
requiring documentation bits for debug commands.
gdb/
2013-04-02 Pedro Alves <palves@redhat.com>
* NEWS: Mention "set/show debug aarch64", "set/show debug
coff-pe-read" and "set/show debug mach-o".
gdb/doc/
2013-04-02 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Debugging Output): Document "set/show debug
aarch64", "set/show debug coff-pe-read" and "set/show debug
mach-o".
The "New commands" section reads:
"New commands (for set/show, see "New options" below)"
gdb/
2013-04-02 Pedro Alves <palves@redhat.com>
* NEWS: Move "set debug notification" and "set trace-buffer-size"
under "New options".
GDB currently sends a qTStatus even if the target previously replied
an empty packet to a previous qTStatus. If the target doesn't
recognize the packet, there's no point in trying again.
The machinery we have in place is packet_ok, which has the nice side
effect of forcing one to install a configuration command/knob for the
packet in question, which is often handy when you need to debug
things, and/or emulate a target that doesn't support the packet, or even,
it can be used as workaround for the old broken kgdb's that return error
to qTSTatus instead of an empty packet.
gdb/
2013-03-28 Pedro Alves <palves@redhat.com>
* NEWS (New options): New section.
(New options): Mention set/show remote trace-status-packet.
* remote.c (PACKET_qTStatus): New enumeration value.
(remote_get_trace_status): Skip sending qTStatus if the packet is
disabled. Use packet_ok.
(_initialize_remote): Register a configuration command for
qTStatus packet.
gdb/doc/
2013-03-28 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Remote Configuration) <set remote @var{name}-packet
table>: Add entry for "trace-status".
* NEWS: Add entry.
* event-top.c: #include "maint.h".
* main.c: #include "maint.h".
* maint.c: #include <sys/time.h>, <time.h>, block.h, top.h,
timeval-utils.h, maint.h, cli/cli-setshow.h.
(per_command_time, per_command_space): New static globals.
(per_command_symtab): New static global.
(per_command_setlist, per_command_showlist): New static globals.
(struct cmd_stats): Move here from utils.c.
(set_per_command_time): Renamed from set_display_time in utils.c
and moved here. All callers updated.
(set_per_command_space): Renamed from set_display_space in utils.c
and moved here. All callers updated.
(count_symtabs_and_blocks): New function.
(report_command_stats): Moved here from utils.c. Add support for
printing symtab stats. Only print data if enabled before command
executed.
(make_command_stats_cleanup): Ditto.
(sert_per_command_cmd, show_per_command_cmd): New functions.
(_initialize_maint_cmds): Add new commands
mt set per-command {space,time,symtab} {on,off}.
* maint.h: New file.
* top.c: #include "maint.h".
* utils.c (reset_prompt_for_continue_wait_time): New function.
(get_prompt_for_continue_wait_time): New function.
* utils.h (reset_prompt_for_continue_wait_time): Declare
(get_prompt_for_continue_wait_time): Declare.
(make_command_stats_cleanup): Moved to maint.h.
(set_display_time, set_display_space): Moved to maint.h and renamed
to set_per_command_time, set_per_command_space.
* cli/cli-setshow.c (parse_cli_boolean_value): Renamed from
parse_binary_operation and made non-static. Don't call error,
just return an error marker. All callers updated.
* cli/cli-setshow.h (parse_cli_boolean_value): Declare.
doc/
* gdb.texinfo (Maintenance Commands): Add docs for
"mt set per-command {space,time,symtab} {on,off}".
testsuite/
* gdb.base/maint.exp: Update tests for per-command stats.
record-full.
Document two new record sub-commands "record instruction-history" and
"record function-call-history" and two associated set/show commands
"set record instruction-history-size" and "set record
function-call-history-size".
Add this to NEWS.
gdb/
* NEWS: Add record changes.
doc/
* gdb.texinfo (Process Record and Replay): Document record
changes.
Hafiz Abid Qadeer <abidh@codesourcery.com>
gdb/
* NEWS: Mention set and show trace-buffer-size commands.
Mention new packet.
* target.h (struct target_ops): New method
to_set_trace_buffer_size.
(target_set_trace_buffer_size): New macro.
* target.c (update_current_target): Set up new method.
* tracepoint.c (trace_buffer_size): New global.
(start_tracing): Send it to the target.
(set_trace_buffer_size): New function.
(_initialize_tracepoint): Add new setshow for trace-buffer-size.
* remote.c (remote_set_trace_buffer_size): New function.
(_initialize_remote): Use it.
(QTBuffer:size) New remote command.
(PACKET_QTBuffer_size): New enum.
(remote_protocol_features): Add an entry for
PACKET_QTBuffer_size.
gdb/gdbserver/
* tracepoint.c (trace_buffer_size): New global.
(DEFAULT_TRACE_BUFFER_SIZE): New define.
(init_trace_buffer): Change to one-argument function. Allocate
trace buffer memory.
(handle_tracepoint_general_set): Call cmd_bigqtbuffer_size to
handle QTBuffer:size packet.
(cmd_bigqtbuffer_size): New function.
(initialize_tracepoint): Call init_trace_buffer with
DEFAULT_TRACE_BUFFER_SIZE.
* server.c (handle_query): Add QTBuffer:size in the
supported packets.
gdb/doc/
* gdb.texinfo (Starting and Stopping Trace Experiments): Document
trace-buffer-size set and show commands.
(Tracepoint Packets): Document QTBuffer:size.
(General Query Packets): Document QTBuffer:size.
gdb/testsuite/
* gdb.trace/trace-buffer-size.exp: New file.
* gdb.trace/trace-buffer-size.c: New file.
Joel Brobecker
Sergio Durigan Junior
Doug Evans
Pedro Alves
Jan Kratochvil
Ulrich Weigand
Tristan Gingold
Yao Qi
Andrew Burgess
Kevin Buettner
Gary Benson
Hui Zhu
Phil Muldoon
Sandra Loosemore
Tom Tromey
Eli Zaretskii
Markus Metzger
Jiong Wang
Hafiz Abid Qadeer