Discussion with qemu folks suggests that the vCont description could
be even simpler and clearer. Given we now say:
For each inferior thread, the leftmost action with a matching
thread-id is applied.
There's really no need to even talk about "default" actions, which
raises doubts about whether "default" is special in some way (it's
not).
See <https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg06944.html>.
gdb/doc/ChangeLog:
2016-10-29 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Packets) <vCont>: Remove mention of default
actions.
Specifically, what happens with multiple actions that could match a
thread, and what happens when we get a vCont action that matches a
thread that was already running. E.g., what does:
"vCont;s:2"
"vCont;s:1;c"
mean for thread 2.
(Thread 2 continues stepping.)
gdb/doc/ChangeLog:
2016-10-26 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Packets): Clarify vCont packets with multiple
actions that match a thread, and what happens when an action
matches a thread that is already running.
The -trace-save MI command supports saving the trace in the CTF format,
as its CLI counterpart, but it's not documented.
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Tracepoint Commands): Document -ctf switch
of -trace-save.
Newer gdbservers may be talking to older gdbs,
and older gdbs will flag a missing "end" as an error.
So just make "end" required again, and for compatibility
change the default field type to "bool".
gdb/ChangeLog:
2016-10-06 Doug Evans <dje@google.com>
* features/aarch64-core.xml (cpsr_flags): Elide "type" and specify
"end" in all fields.
* features/aarch64.c: Regenerate.
* features/i386/32bit-mpx.xml (_bndcfgu): Specify type of "preserved"
and "enabled" fields. Correct size of "enabled" field.
* features/i386/64bit-mpx.xml (_bndcfgu): Specify type of "preserved"
and "enabled" fields.
* features/i386/i386-avx-mpx-linux.c: Regenerate.
* features/i386/i386-avx-mpx.c: Regenerate.
* features/i386/i386-avx512-linux.c: Regenerate.
* features/i386/i386-avx512.c: Regenerate.
* features/i386/i386-mpx-linux.c: Regenerate.
* features/i386/i386-mpx.c: Regenerate.
* features/arc-arcompact.c: Regenerate.
* features/arc-v2.c: Regenerate.
* xml-tdesc.c (tdesc_start_field): Require "end" spec. Single bit
fields default to "bool" type.
Revert 2016-03-15 Doug Evans <dje@google.com>
* features/i386/32bit-core.xml (i386_eflags): Remove "end" spec.
* features/i386/32bit-sse.xml (i386_eflags): Ditto.
* features/i386/64bit-core.xml (i386_eflags): Ditto.
* features/i386/64bit-sse.xml (i386_eflags): Ditto.
* features/i386/x32-core.xml (i386_eflags): Ditto.
gdb/doc/ChangeLog:
2016-10-06 Doug Evans <dje@google.com>
* gdb.texinfo (Target Description Format): Update docs on "end"
field spec and field default type.
gdb/testsuite/ChangeLog:
2016-10-06 Doug Evans <dje@google.com>
* gdb.xml/extra-regs.xml: Update, end field now required, default type
for single bitfields is bool.
* gdb.xml/tdesc-regs.exp: Ditto.
With this patch, when an inferior, thread or frame is explicitly
selected by the user, notifications will appear on all CLI and MI UIs.
When a GDB console is integrated in a front-end, this allows the
front-end to follow a selection made by the user ont he CLI, and it
informs the user about selection changes made behind the scenes by the
front-end.
This patch addresses PR gdb/20487.
In order to communicate frame changes to the front-end, this patch adds
a new field to the =thread-selected event for the selected frame. The
idea is that since inferior/thread/frame can be seen as a composition,
it makes sense to send them together in the same event. The vision
would be to eventually send the inferior information as well, if we find
that it's needed, although the "=thread-selected" event would be
ill-named for that job.
Front-ends need to handle this new field if they want to follow the
frame selection changes that originate from the console. The format of
the frame attribute is the same as what is found in the *stopped events.
Here's a detailed example for each command and the events they generate:
thread
------
1. CLI command:
thread 1.3
MI event:
=thread-selected,id="3",frame={...}
2. MI command:
-thread-select 3
CLI event:
[Switching to thread 1.3 ...]
3. MI command (CLI-in-MI):
thread 1.3
MI event/reply:
&"thread 1.3\n"
~"#0 child_sub_function () ...
=thread-selected,id="3",frame={level="0",...}
^done
frame
-----
1. CLI command:
frame 1
MI event:
=thread-selected,id="3",frame={level="1",...}
2. MI command:
-stack-select-frame 1
CLI event:
#1 0x00000000004007f0 in child_function...
3. MI command (CLI-in-MI):
frame 1
MI event/reply:
&"frame 1\n"
~"#1 0x00000000004007f9 in ..."
=thread-selected,id="3",frame={level="1"...}
^done
inferior
--------
Inferior selection events only go from the console to MI, since there's
no way to select the inferior in pure MI.
1. CLI command:
inferior 2
MI event:
=thread-selected,id="3"
Note that if the user selects an inferior that is not started or exited,
the MI doesn't receive a notification. Since there is no threads to
select, the =thread-selected event does not apply...
2. MI command (CLI-in-MI):
inferior 2
MI event/reply:
&"inferior 2\n"
~"[Switching to inferior 2 ...]"
=thread-selected,id="4",frame={level="0"...}
^done
Internal implementation detail: this patch makes it possible to suppress
notifications caused by a CLI command, like what is done in mi-interp.c.
This means that it's now possible to use the
add_com_suppress_notification function to register a command with some
event suppressed. It is used to implement the select-frame command in
this patch.
The function command_notifies_uscc_observer was added to extract
the rather complicated logical expression from the if statement. It is
also now clearer what that logic does: if the command used by the user
already notifies the user_selected_context_changed observer, there is
not need to notify it again. It therefore protects again emitting the
event twice.
No regressions, tested on ubuntu 14.04 x86 with target boards unix and
native-extended-gdbserver.
gdb/ChangeLog:
YYYY-MM-DD Antoine Tremblay <antoine.tremblay@ericsson.com>
YYYY-MM-DD Simon Marchi <simon.marchi@ericsson.com>
PR gdb/20487
* NEWS: Mention new frame field of =thread-selected event.
* cli/cli-decode.c (add_cmd): Initialize c->suppress_notification.
(add_com_suppress_notification): New function definition.
(cmd_func): Set and restore the suppress_notification flag.
* cli/cli-deicode.h (struct cmd_list_element)
<suppress_notification>: New field.
* cli/cli-interp.c (cli_suppress_notification): New global variable.
(cli_on_user_selected_context_changed): New function.
(_initialize_cli_interp): Attach to user_selected_context_changed
observer.
* command.h (struct cli_suppress_notification): New structure.
(cli_suppress_notification): New global variable declaration.
(add_com_suppress_notification): New function declaration.
* defs.h (enum user_selected_what_flag): New enum.
(user_selected_what): New enum flag type.
* frame.h (print_stack_frame_to_uiout): New function declaration.
* gdbthread.h (print_selected_thread_frame): New function declaration.
* inferior.c (print_selected_inferior): New function definition.
(inferior_command): Remove printing of inferior/thread/frame switch
notifications, notify user_selected_context_changed observer.
* inferior.h (print_selected_inferior): New function declaration.
* mi/mi-cmds.c (struct mi_cmd): Add user_selected_context
suppression to stack-select-frame and thread-select commands.
* mi/mi-interp.c (struct mi_suppress_notification)
<user_selected_context>: Initialize.
(mi_user_selected_context_changed): New function definition.
(_initialize_mi_interp): Attach to user_selected_context_changed.
* mi/mi-main.c (mi_cmd_thread_select): Print thread selection reply.
(mi_execute_command): Handle notification suppression. Notify
user_selected_context_changed observer on thread change instead of printing
event directly. Don't send it if command already sends the notification.
(command_notifies_uscc_observer): New function.
(mi_cmd_execute): Don't handle notification suppression.
* mi/mi-main.h (struct mi_suppress_notification)
<user_selected_context>: New field.
* stack.c (print_stack_frame_to_uiout): New function definition.
(select_frame_command): Notify user_selected_context_changed
observer.
(frame_command): Call print_selected_thread_frame if there's no frame
change or notify user_selected_context_changed observer if there is.
(up_command): Notify user_selected_context_changed observer.
(down_command): Likewise.
(_initialize_stack): Suppress user_selected_context notification for
command select-frame.
* thread.c (thread_command): Notify
user_selected_context_changed if the thread has changed, print
thread info directly if it hasn't.
(do_captured_thread_select): Do not print thread switch event.
(print_selected_thread_frame): New function definition.
* tui/tui-interp.c (tui_on_user_selected_context_changed):
New function definition.
(_initialize_tui_interp): Attach to user_selected_context_changed
observer.
gdb/doc/ChangeLog:
PR gdb/20487
* gdb.texinfo (Context management): Update mention of frame
change notifications.
(gdb/mi Async Records): Document frame field in
=thread-select event.
* observer.texi (GDB Observers): New user_selected_context_changed
observer.
gdb/testsuite/ChangeLog:
PR gdb/20487
* gdb.mi/mi-pthreads.exp (check_mi_thread_command_set): Adapt
=thread-select-event check.
I was reading the gdb RSP manual recently and I found a number of
small problems in the documentation. This patch attempts to improve
these areas. Specfically:
* The term "memory breakpoint" is used only in this section of the
manual, and there inconsistently. I found this term confusing --
initially I thought it might be a watchpoint. This patch changes it
to use the term "software breakpoint", which is used in the rest of
the manual.
* The z0 packet didn't document how "kind" was written. And, it had a
stray link to the architecture-specific protocol details node. This
patch moves this link to a better spot.
* The z1 patch didn't document that it accepts cmd_list.
* I couldn't find any text saying what response is given to a command
like vCont in non-stop mode. The answer is that OK is sent, and
then a stop reply is sent as a notification. This patch adds a note
about this.
* The "create" stop reply did not document that the "R" argument is
ignored.
* The "W", "X", and "w" packets did not document how the "AA" part is
formatted.
* The %Stop notification example said "%%Stop", but I think this is
incorrect.
2016-09-28 Tom Tromey <tom@tromey.com>
* gdb.texinfo (Packets) <z0>: Use "software breakpoint" rather
than "memory breakpoint". Further document "kind". Move
protocol-details link earlier.
<z1>: Document the cmd_list argument. Fix typo.
<g>: Remove incorrect sentence.
(Stop Reply Packets): Document "OK" response to requests when in
non-stop mode.
<swbreak>: Use "software breakpoint" rather than "memory
breakpoint".
<create>: Document that "R" is ignored.
<W, X, w>: Document formatting of "AA".
(Notification Packets): Use "%Stop", not "%%Stop".
ARC is a family of licensable processors developed by Synopsys.
This is an initial patch that doesn't yet support some of the features, that
are already available in Synopsys' fork of GDB, namely:
* longjmp support
* signal frame handling
* prologue analysis
* Linux targets support
* native Linux support
ARC cores are configurable and extensible, which means from debugger
perspective that some registers and debug capabilities are optional, therefore
it is up to the GDB stub to determine exact list of register available on
target and supply it to GDB via XML target descriptions. List of registers
that is known to GDB and is required is intentionally kept small to simplify
requirements to GDB stub and implementation of a GDB client.
gdb/ChangeLog:
* Makefile.in (ALL_TARGET_OBS): Add arc-tdep.o.
(HFILES_NO_SRCDIR): Add arc-tdep.h.
(ALLDEPFILES): Add arc-tdep.c.
* NEWS: Mention new ARC port.
* configure.tgt: Add ARC.
* arc-tdep.c: New file.
* arc-tdep.h: New file.
* features/Makefile (XMLTOC): Add arc-v2.xml and arc-arcompact.xml.
* features/arc-v2.xml: New file.
* features/arc-v2.c: New file (generated).
* features/arc-arcompact.xml: New file.
* features/arc-arcompact.c: New file (generated).
gdb/doc/ChangeLog:
* gdb.texinfo (Embedded Processors): Document ARC.
(Synopsys ARC): New section.
(Standard Target Features): Document ARC features.
(ARC Features): New section.
gdb/testsuite/ChangeLog:
* gdb.xml/tdesc-regs.exp: set core-regs for arc*-*-elf32.
This patch adds a bunch of generated files to gdb's gitignore files.
There are still a bunch of "stamp" files that are not ignored, but I
think the rule for them should be put in the top-level gitignore.
Users and developers are encouraged to build out-of-tree, but some
people prefer the simplicity to build in-tree, so it should be useful
for them.
gdb/ChangeLog:
* .gitignore: Ignore more files.
* data-directory/.gitignore: Likewise.
gdb/doc/ChangeLog:
* .gitignore: New file.
gdb/gdbserver/ChangeLog:
* .gitinore: Ignore more files.
gdb/testsuite/ChangeLog:
* .gitignore: New file.
This patch allows the user to set the inferior-tty to "empty", in order
to come back to the default behaviour of using the same tty as gdb is
using.
This is already supported in MI (and tested in gdb.mi/mi-basics.exp).
I added a new test, set-inferior-tty.exp, where I test only the setting
and unsetting of the parameter. It would be nice to actually test that
the inferior output properly goes to the separate tty, but that will be
for another day.
gdb/ChangeLog:
* infcmd.c (set_inferior_io_terminal): Set inferior terminal to
NULL if terminal_name is an empty string.
(_initialize_infcmd): Make the argument of "set inferior-tty"
optional, mention it in the help doc.
gdb/doc/ChangeLog:
* gdb.texinfo (Input/Output): Mention possibility to unset
inferior-tty.
gdb/testsuite/ChangeLog:
* gdb.base/set-inferior-tty.exp: New file.
* gdb.base/set-inferior-tty.c: New file.
This patch allows gdbserver to continue recording after disconnect. On
reconnect, the recorded data is accessible to gdb as if no disconnect happened.
A possible application for this feature is remotely examine bugs that occur
at irregular intervals, where maintaining a gdb connection is inconvenient.
This also fixes the issue mentioned here:
https://sourceware.org/ml/gdb-patches/2015-11/msg00424.html
Signed-off-by: Tim Wiederhake <tim.wiederhake@intel.com>
gdb/ChangeLog:
* NEWS: Resume btrace on reconnect.
* record-btrace.c: Added record-btrace.h include.
(record_btrace_open): Split into this and ...
(record_btrace_push_target): ... this.
(record_btrace_disconnect): New function.
(init_record_btrace_ops): Use record_btrace_disconnect.
* record-btrace.h: New file.
* remote.c: Added record-btrace.h include.
(remote_start_remote): Check recording status.
(remote_btrace_maybe_reopen): New function.
gdb/doc/ChangeLog:
* gdb.texinfo: Resume btrace on reconnect.
gdb/testsuite/ChangeLog:
* gdb.btrace/reconnect.c: New file.
* gdb.btrace/reconnect.exp: New file.
Change-Id: I95e8b0ab8a89e58591aba0e63818cee82fd211bc
Implement support to add catchpoints for a group of related syscalls
using the syntax:
(gdb) catch syscall group:<group>
or
(gdb) catch syscall g:<group>
Several groups are predefined in the xml files for all architectures
supported by GDB over Linux. They are based on the groups defined by
strace.
gdb/
* xml-syscall.c (get_syscalls_by_group): New.
(get_syscall_group_names): New.
(struct syscall_group_desc): New structure to store group data.
(struct syscalls_info): Include field to store the group list.
(sysinfo_free_syscall_group_desc): New.
(free_syscalls_info): Free group list.
(syscall_group_create_syscall_group_desc): New.
(syscall_group_add_syscall): New.
(syscall_create_syscall_desc): Add syscall to its groups.
(syscall_start_syscall): Load group attribute.
(syscall_group_get_group_by_name): New.
(xml_list_syscalls_by_group): New.
(xml_list_of_groups): New.
* xml-syscall.h (get_syscalls_by_group): Export function
to retrieve a list of syscalls filtered by the group name.
(get_syscall_group_names): Export function to retrieve the list
of syscall groups.
* break-catch-syscall.c (catch_syscall_split_args): Verify if
argument is a syscall group and expand it to a list of syscalls
when creating catchpoints.
(catch_syscall_completer): Add word completion for system call
groups.
* configure.ac: Include dependency for xsltproc when building
in maintainer-mode.
* break-catch-syscall.c (_initialize_breakpoint): Update catch
syscall command documentation.
* NEWS: Include section about catching groups of syscalls.
* configure: Regenerate.
* data-directory/Makefile.in: Generate syscall xml when building
in maintainer mode.
* syscalls/gdb-syscalls.dtd: Include group attribute to the
syscall element.
* syscalls/apply-defaults.xsl: New.
* syscalls/linux-defaults.xml.in: New.
* syscalls/aarch64-linux.xml: Rename to aarch64-linux.xml.in.
* syscalls/amd64-linux.xml: Rename to amd64-linux.xml.in.
* syscalls/arm-linux.xml: Rename to arm-linux.xml.in.
* syscalls/bfin-linux.xml: Rename to bfin-linux.xml.in.
* syscalls/i386-linux.xml: Rename to i386-linux.xml.in.
* syscalls/mips-n32-linux.xml: Rename to mips-n32-linux.xml.in.
* syscalls/mips-n64-linux.xml: Rename to mips-n64-linux.xml.in.
* syscalls/mips-o32-linux.xml: Rename to mips-o32-linux.xml.in.
* syscalls/ppc-linux.xml: Rename to ppc-linux.xml.in.
* syscalls/ppc64-linux.xml: Rename to ppc64-linux.xml.in.
* syscalls/s390-linux.xml: Rename to s390-linux.xml.in.
* syscalls/s390x-linux.xml: Rename to s390x-linux.xml.in.
* syscalls/sparc-linux.xml: Rename to sparc-linux.xml.in.
* syscalls/sparc64-linux.xml: Rename to sparc64-linux.xml.in.
* syscalls/aarch64-linux.xml: Regenerate.
* syscalls/amd64-linux.xml: Regenerate.
* syscalls/arm-linux.xml: Regenerate.
* syscalls/i386-linux.xml: Regenerate.
* syscalls/mips-n32-linux.xml: Regenerate.
* syscalls/mips-n64-linux.xml: Regenerate.
* syscalls/mips-o32-linux.xml: Regenerate.
* syscalls/ppc-linux.xml: Regenerate.
* syscalls/ppc64-linux.xml: Regenerate.
* syscalls/s390-linux.xml: Regenerate.
* syscalls/s390x-linux.xml: Regenerate.
* syscalls/sparc-linux.xml: Regenerate.
* syscalls/sparc64-linux.xml: Regenerate.
gdb/testsuite/
* gdb.base/catch-syscall.exp (do_syscall_tests): Add call
to test_catch_syscall_group.
(test_catch_syscall_group): New.
gdb/doc/
* gdb.texinfo (Set Catchpoints): Add 'group' argument to catch
syscall.
This patch adds some breakpoint events to Python. In particular,
there is a creation event that is emitted when a breakpoint is
created; a modification event that is emitted when a breakpoint
changes somehow; and a deletion event that is emitted when a
breakpoint is deleted.
In this patch, the event's payload is the breakpoint itself. I
considered making a new event type to hold the breakpoint, but I
didn't see a need. Still, I thought I would mention this as a spot
where some other choice is possible.
Built and regtested on x86-64 Fedora 23.
2016-07-13 Tom Tromey <tom@tromey.com>
PR python/15620, PR python/18620:
* python/py-evts.c (gdbpy_initialize_py_events): Call
add_new_registry for new events.
* python/py-events.h (events_object) <breakpoint_created,
breakpoint_deleted, breakpoint_modified>: New fields.
* python/py-breakpoint.c (gdbpy_breakpoint_created): Emit the
breakpoint changed event.
(gdbpy_breakpoint_deleted): Emit the breakpoint deleted event.
(gdbpy_breakpoint_modified): New function.
(gdbpy_initialize_breakpoints): Attach to the breakpoint modified
observer.
2016-07-13 Tom Tromey <tom@tromey.com>
PR python/15620, PR python/18620:
* python.texi (Events In Python): Document new breakpoint events.
2016-07-13 Tom Tromey <tom@tromey.com>
PR python/15620, PR python/18620:
* gdb.python/py-breakpoint.exp (connect_event, check_last_event)
(test_bkpt_events): New procs.
This patch adds a "pending" attribute to gdb.Breakpoint.
Built and regtested on x86-64 Fedora 23.
2016-07-13 Tom Tromey <tom@tromey.com>
PR python/17698:
* NEWS: Update.
* python/py-breakpoint.c (bppy_get_pending): New function.
(breakpoint_object_getset): Add entry for "pending".
* breakpoint.h (pending_breakpoint_p): Declare.
* breakpoint.c (pending_breakpoint_p): New function.
2016-07-13 Tom Tromey <tom@tromey.com>
PR python/17698:
* python.texi (Breakpoints In Python): Document
Breakpoint.pending.
2016-07-13 Tom Tromey <tom@tromey.com>
PR python/17698:
* gdb.python/py-breakpoint.exp (test_bkpt_basic): Add "pending"
test.
(test_watchpoints): Likewise.
(test_bkpt_pending): New proc.
I noticed that the Python breakpoint documentation was ordered a bit
oddly. It documented the constructor; then the stop method; then the
watchpoint constants (used for the constructor); then various other
methods and attributes; then the other constants used by the
constructor; and then finally some more methods and attributes.
This patch rearranges the node a little to move the constants to just
after the constructor and before the other methods and attributes.
2016-07-13 Tom Tromey <tom@tromey.com>
* python.texi (Breakpoints In Python): Move table of types and
table of watchpoint types earlier in node.
PR python/19293 notes that when a Python unwinder is disabled, the
frame cache is not invalidated. This means that disabling an unwinder
doesn't have any immediate effect -- but in my experience it's often
the case that I want to enable or disable an unwinder in order to see
what happens.
This patch adds a new gdb.invalidate_cached_frames function and
arranges for the relevant bits of library code to call it. I've only
partially documented this function, considering a warning sufficient
without going into all the reasons ordinary code should not call it.
The name of the new function was taken from a comment in frame.h next
to reinit_frame_cache.
No new test as I think the updates to the existing test are sufficient
to show that the code is working as intended.
Built and regtested on x86-64 Fedora 23.
2016-07-12 Tom Tromey <tom@tromey.com>
PR python/19293:
* python/lib/gdb/command/unwinders.py (do_enable_unwinder): Call
gdb.invalidate_cached_frames.
* python/lib/gdb/unwinder.py (register_unwinder): Call
gdb.invalidate_cached_frames.
* python/python.c (gdbpy_invalidate_cached_frames): New function.
(python_GdbMethods): Add entry for invalidate_cached_frames.
2016-07-12 Tom Tromey <tom@tromey.com>
PR python/19293:
* python.texi (Frames In Python): Document
gdb.invalidate_cached_frames.
2016-07-12 Tom Tromey <tom@tromey.com>
PR python/19293:
* gdb.python/py-unwind-maint.exp: Update tests.
gdb/ChangeLog:
2016-06-21 Pedro Alves <palves@redhat.com>
* NEWS: Mention support for running interpreters on separate
UIs and the new new-ui command.
gdb/doc/ChangeLog:
2016-06-21 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Interpreters): Update intepreter-exec section,
document new-ui and explain use case.
This change adds support for specifying a negative repeat count to
all the formats of the 'x' command to examine memory backward.
A new testcase 'examine-backward' is added to cover this new feature.
Here's the example output from the new feature:
<format 'i'>
(gdb) bt
#0 Func1 (n=42, p=0x40432e "hogehoge") at main.cpp:5
#1 0x00000000004041fa in main (argc=1, argv=0x7fffffffdff8) at main.cpp:19
(gdb) x/-4i 0x4041fa
0x4041e5 <main(int, char**)+11>: mov %rsi,-0x10(%rbp)
0x4041e9 <main(int, char**)+15>: lea 0x13e(%rip),%rsi
0x4041f0 <main(int, char**)+22>: mov $0x2a,%edi
0x4041f5 <main(int, char**)+27>: callq 0x404147
<format 'x'>
(gdb) x/-4xw 0x404200
0x4041f0 <main(int, char**)+22>: 0x00002abf 0xff4de800 0x76e8ffff 0xb8ffffff
(gdb) x/-4
0x4041e0 <main(int, char**)+6>: 0x7d8910ec 0x758948fc 0x358d48f0 0x0000013e
gdb/ChangeLog:
* NEWS: Mention that GDB now supports a negative repeat count in
the 'x' command.
* printcmd.c (decode_format): Allow '-' in the parameter
"string_ptr" to accept a negative repeat count.
(find_instruction_backward): New function.
(read_memory_backward): New function.
(integer_is_zero): New function.
(find_string_backward): New function.
(do_examine): Use new functions to examine memory backward.
(_initialize_printcmd): Mention that 'x' command supports a negative
repeat count.
gdb/doc/ChangeLog:
* gdb.texinfo (Examining Memory): Document negative repeat
count in the 'x' command.
gdb/testsuite/ChangeLog:
* gdb.base/examine-backward.c: New file.
* gdb.base/examine-backward.exp: New file.
Eclipse CDT now supports enabling execution recording using two methods
(full and btrace) and both formats for btrace (bts and pt). In the
event that recording is enabled behind the back of the GUI (by the user
on the command line, or a script), we need to know which method/format
are being used, so it can be correctly reflected in the interface. This
patch adds this information to the =record-started async record.
Before:
=record-started,thread-group="i1"
After:
=record-started,thread-group="i1",method="btrace",format="bts"
=record-started,thread-group="i1",method="btrace",format="pt"
=record-started,thread-group="i1",method="full"
The "format" field is only present when the current method supports
multiple formats (only the btrace method as of now).
gdb/ChangeLog:
* NEWS: Mention the new fields in =record-started.
* common/btrace-common.h (btrace_format_short_string): New function
declaration.
* common/btrace-common.c (btrace_format_short_string): New
function.
* mi/mi-interp.c (mi_record_changed): Output method and format
fields in the =record-started record.
* record-btrace.c (record_btrace_open): Adapt record_changed
notification.
* record-full.c (record_full_open): Likewise.
* record.c (cmd_record_stop): Likewise.
gdb/doc/ChangeLog:
* gdb.texinfo (GDB/MI Async Records): Document method and
format fields in =record-started.
* observer.texi (record_changed): Add method and format
parameters.
gdb/testsuite/ChangeLog:
* gdb.mi/mi-record-changed.exp: Adjust =record-started output
matching.
gdb/doc/ChangeLog:
* gdb.texinfo (General Query Packets): Move the description of the
response before the long list of the specific 'read' and 'write'
requests.
PR python/17981 notes that gdb.breakpoints() returns None when there
are no breakpoints; whereas an empty list or tuple would be more in
keeping with Python and the documentation.
This patch fixes the bug by changing the no-breakpoint return to make
an empty tuple.
Built and regtested on x86-64 Fedora 23.
2016-05-23 Tom Tromey <tom@tromey.com>
PR python/17981:
* python/py-breakpoint.c (gdbpy_breakpoints): Return a new tuple
when there are no breakpoints.
2016-05-23 Tom Tromey <tom@tromey.com>
* python.texi (Basic Python): Document gdb.breakpoints return.
2016-05-23 Tom Tromey <tom@tromey.com>
PR python/17981:
* gdb.python/py-breakpoint.exp (test_bkpt_basic): Add test for
no-breakpoint case.
PR gdb/19194 points out a typo in the documentation. I'm checking
this in as obvious.
2016-05-24 Tom Tromey <tom@tromey.com>
PR gdb/19194:
* gdb.texinfo (gdb man): Fix typo.
This patch adds documentation for the new Rust support in gdb.
2016-05-17 Tom Tromey <tom@tromey.com>
* NEWS: Add Rust item.
2016-05-17 Tom Tromey <tom@tromey.com>
* gdb.texinfo (Supported Languages): Mention Rust. Update menu.
(Rust): New node.
I wanted to unit test the Rust lexer, so I added a simple unit testing
command to gdb.
The intent is that self tests will only be compiled into gdb in
development mode. In release mode they simply won't exist. So, this
exposes $development to C code as GDB_SELF_TEST.
In development mode, test functions are registered with the self test
module. A test function is just a function that does some checks, and
throws an exception on failure.
Then this adds a new "maint selftest" command which invokes the test
functions, and a new dejagnu test case that invokes it.
2016-05-17 Tom Tromey <tom@tromey.com>
* NEWS: Add "maint selftest" entry.
* selftest.h: New file.
* selftest.c: New file.
* maint.c: Include selftest.h.
(maintenance_selftest): New function.
(_initialize_maint_cmds): Add "maint selftest" command.
* configure.ac (GDB_SELF_TEST): Maybe define.
* config.in, configure: Rebuild.
* Makefile.in (SFILES): Add selftest.c.
(COMMON_OBS): Add selftest.o.
2016-05-17 Tom Tromey <tom@tromey.com>
* gdb.texinfo (Maintenance Commands): Document "maint selftest".
2016-05-17 Tom Tromey <tom@tromey.com>
* gdb.gdb/unittest.exp: New file.
Hi,
command "tfind" will find the first trace snapshot if no trace
snapshot is selected, but this behavior isn't documented.
This patch completes the doc of command "tfind" without argument.
gdb/doc:
2016-04-27 Yao Qi <yao.qi@linaro.org>
* gdb.texinfo (tfind): Complete doc about tfind without
argument.
This patch fixes the documentation for the zero_ext bytecode description.
It removes parts that seemed like a copy/paste from ext, since zero_ext
zeros the bits to the left.
gdb/doc/ChangeLog:
* agentexpr.texi (zero_ext): Fix zero_ext description.
This removes support for:
| target | source |
|-------------------+-----------------------|
| target m32rsdi | gdb/remote-m32r-sdi.c |
| target mips | gdb/remote-mips.c |
| target pmon | gdb/remote-mips.c |
| target ddb | gdb/remote-mips.c |
| target rockhopper | gdb/remote-mips.c |
| target lsi | gdb/remote-mips.c |
That is:
- Remote M32R debugging over SDI.
- Debugging boards using the MIPS remote debugging protocol
over a serial line, PMON, and a few variants.
These are the last non-"target remote" remote targets in the tree, if
you don't count "target sim".
Refs:
https://sourceware.org/ml/gdb/2016-03/msg00004.htmlhttps://sourceware.org/ml/gdb-patches/2016-03/msg00580.html
gdb/ChangeLog:
2016-03-31 Pedro Alves <palves@redhat.com>
* NEWS: Mention that support for "target m32rsdi", "target mips",
"target pmon", "target ddb", "target rockhopper", and "target lsi"
was removed.
* Makefile.in (ALL_TARGET_OBS): Remove remote-m32r-sdi.o and
remote-mips.o.
(ALLDEPFILES): Remove remote-m32r-sdi.c and remote-mips.c.
* configure.tgt: Remove all references to remote-m32r-sdi.o and
remote-mips.o.
* mips-tdep.c (deprecated_mips_set_processor_regs_hack): Delete
function.
* mips-tdep.h (deprecated_mips_set_processor_regs_hack): Delete
declaration.
* remote-m32r-sdi.c, remote-mips.c: Delete files.
* symfile.c (generic_load, generic_load): Remove comments.
gdb/doc/ChangeLog:
2016-03-31 Pedro Alves <palves@redhat.com>
* gdb.texinfo (M32R/SDI): Delete node.
(MIPS Embedded): Remove references to the MIPS remote debugging
protocol, PMON and variants, and the associated commands.
gdb/doc/ChangeLog:
2016-03-15 Pedro Alves <palves@redhat.com>
Andreas Arnez <arnez@linux.vnet.ibm.com>
Marcin Kościelnicki <koriakin@0x04.net>
* gdb.texinfo (Tracepoint Actions): Document possible
unreliability of '$_ret'.
Add a new command 'maint info line-table' to display the contents of
GDB's internal line table structure. Useful when trying to understand
problems (within gdb) relating to line tables.
gdb/ChangeLog:
* symmisc.c (maintenance_info_line_tables): New function.
(maintenance_print_one_line_table): New function.
(_initialize_symmisc): Register 'maint info line-table' command.
* NEWS: Mention new command.
gdb/doc/ChangeLog:
* gdb.texinfo (Symbols): Document new 'maint info line-table'
command.
gdb/testsuite/ChangeLog:
* gdb.base/maint.exp: New tests for 'maint info line-table'.
This patch is a follow-up to "Add printf format specifier for printing
enumerator":
https://sourceware.org/ml/gdb-patches/2016-02/msg00144.html
Instead of having a solution specific to the printf command, Pedro
suggested adding a general purpose function $_as_string() that would
cover this use case and more.
So, in order to print the textual label of an enum, one can use:
(gdb) printf "Visiting node of type %s\n", $_as_string(node)
Visiting node of type NODE_INTEGER
gdb/ChangeLog:
* data-directory/Makefile.in (PYTHON_FILE_LIST): Install
gdb/function/as_string.py.
* python/lib/gdb/function/as_string.py: New file.
* NEWS: Mention the new $_as_string function.
gdb/testsuite/ChangeLog:
* gdb.python/py-as-string.exp: New file.
* gdb.python/py-as-string.c: New file.
gdb/doc/ChangeLog:
* gdb.texinfo (Convenience Functions): Document $_as_string.
gdb/ChangeLog:
Extend "skip" command to support -file, -gfile, -function, -rfunction.
* NEWS: Document new features.
* skip.c: #include "fnmatch.h", "gdb_regex.h".
(skiplist_entry) <file>: Renamed from filename.
<function>: Renamed from function_name.
<file_is_glob, function_is_regexp>: New members.
<compiled_function_regexp, compiled_function_regexp_is_valid>:
New members.
(make_skip_entry): New function.
(free_skiplist_entry, free_skiplist_entry_cleanup): New functions.
(make_free_skiplist_entry_cleanup): New function.
(skip_file_command): Update.
(skip_function, skip_function_command): Update.
(compile_skip_regexp): New functions.
(skip_command): Add support for new options.
(skip_info): Update.
(skip_file_p, skip_gfile_p): New functions.
(skip_function_p, skip_rfunction_p): New functions.
(function_name_is_marked_for_skip): Update and simplify.
(_initialize_step_skip): Update.
* symtab.c: #include "fnmatch.h".
(compare_glob_filenames_for_search): New function.
* symtab.h (compare_glob_filenames_for_search): Declare.
* utils.c (count_path_elements): New function.
(strip_leading_path_elements): New function.
* utils.h (count_path_elements): Declare.
(strip_leading_path_elements): Declare.
gdb/doc/ChangeLog:
* gdb.texinfo (Skipping Over Functions and Files): Document new
options to "skip" command. Update docs of output of "info skip".
gdb/testsuite/ChangeLog:
* gdb.base/skip.c (test_skip): New function.
(end_test_skip_file_and_function): New function.
(test_skip_file_and_function): New function.
* gdb.base/skip1.c (test_skip): New function.
(skip1_test_skip_file_and_function): New function.
* gdb.base/skip.exp: Add tests for new skip options.
* gdb.base/skip-solib.exp: Update expected output.
* gdb.perf/skip-command.cc: New file.
* gdb.perf/skip-command.exp: New file.
* gdb.perf/skip-command.py: New file.
With Intel Memory Protection Extensions it was introduced the concept of
boundary violation. A boundary violations is presented to the inferior as
a segmentation fault having SIGCODE 3. This patch adds a
handler for a boundary violation extending the information displayed
when a bound violation is presented to the inferior. In the stop mode
case the debugger will also display the kind of violation: "upper" or
"lower", bounds and the address accessed.
On no stop mode the information will still remain unchanged. Additional
information about bound violations are not meaningful in that case user
does not know the line in which violation occurred as well.
When the segmentation fault handler is stop mode the out puts will be
changed as exemplified below.
The usual output of a segfault is:
Program received signal SIGSEGV, Segmentation fault
0x0000000000400d7c in upper (p=0x603010, a=0x603030, b=0x603050,
c=0x603070, d=0x603090, len=7) at i386-mpx-sigsegv.c:68
68 value = *(p + len);
In case it is a bound violation it will be presented as:
Program received signal SIGSEGV, Segmentation fault
Upper bound violation while accessing address 0x7fffffffc3b3
Bounds: [lower = 0x7fffffffc390, upper = 0x7fffffffc3a3]
0x0000000000400d7c in upper (p=0x603010, a=0x603030, b=0x603050,
c=0x603070, d=0x603090, len=7) at i386-mpx-sigsegv.c:68
68 value = *(p + len);
In mi mode the output of a segfault is:
*stopped,reason="signal-received",signal-name="SIGSEGV",
signal-meaning="Segmentation fault", frame={addr="0x0000000000400d7c",
func="upper",args=[{name="p", value="0x603010"},{name="a",value="0x603030"}
,{name="b",value="0x603050"}, {name="c",value="0x603070"},
{name="d",value="0x603090"},{name="len",value="7"}],
file="i386-mpx-sigsegv.c",fullname="i386-mpx-sigsegv.c",line="68"},
thread-id="1",stopped-threads="all",core="6"
in the case of a bound violation:
*stopped,reason="signal-received",signal-name="SIGSEGV",
signal-meaning="Segmentation fault",
sigcode-meaning="Upper bound violation",
lower-bound="0x603010",upper-bound="0x603023",bound-access="0x60302f",
frame={addr="0x0000000000400d7c",func="upper",args=[{name="p",
value="0x603010"},{name="a",value="0x603030"},{name="b",value="0x603050"},
{name="c",value="0x603070"},{name="d",value="0x603090"},
{name="len",value="7"}],file="i386-mpx-sigsegv.c",
fullname="i386-mpx-sigsegv.c",line="68"},thread-id="1",
stopped-threads="all",core="6"
2016-02-18 Walfred Tedeschi <walfred.tedeschi@intel.com>
gdb/ChangeLog:
* NEWS: Add entry for bound violation.
* amd64-linux-tdep.c (amd64_linux_init_abi_common):
Add handler for segmentation fault.
* gdbarch.sh (handle_segmentation_fault): New.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* i386-linux-tdep.c (i386_linux_handle_segmentation_fault): New.
(SIG_CODE_BONDARY_FAULT): New define.
(i386_linux_init_abi): Use i386_mpx_bound_violation_handler.
* i386-linux-tdep.h (i386_linux_handle_segmentation_fault) New.
* i386-tdep.c (i386_mpx_enabled): Add as external.
* i386-tdep.c (i386_mpx_enabled): Add as external.
* infrun.c (handle_segmentation_fault): New function.
(print_signal_received_reason): Use handle_segmentation_fault.
gdb/testsuite/ChangeLog:
* gdb.arch/i386-mpx-sigsegv.c: New file.
* gdb.arch/i386-mpx-sigsegv.exp: New file.
* gdb.arch/i386-mpx-simple_segv.c: New file.
* gdb.arch/i386-mpx-simple_segv.exp: New file.
gdb/doc/ChangeLog:
* gdb.texinfo (Signals): Add bound violation display hints for
a SIGSEGV.
tfile_fetch_registers currently wrongly fetches registers using
gdb order instead of g packet order. On x86_64 with AVX, this causes
problems with ymm*h and orig_rax registers: gdb has ymm*h first, while
g packet has orig_rax first.
gdb/ChangeLog:
* tracefile-tfile.c (tfile_fetch_registers): Use g packet order
instead of gdb order.
gdb/doc/ChangeLog:
* gdb.texinfo (Trace File Format): Remove misleading information
about register block ordering.
For languages with dynamic types, an incorrect program, or uninitialised
variables within a program, could result in an incorrect, overly large
type being associated with a value. Currently, attempting to print such
a variable will result in gdb trying to allocate an overly large buffer.
If this large memory allocation fails then the result can be gdb either
terminating, or (due to memory contention) becoming unresponsive for the
user.
A new user visible variable in gdb helps guard against such problems,
two new commands are available:
set max-value-size
show max-value-size
The 'max-value-size' is the maximum size of memory in bytes that gdb
will allocate for the contents of a value. Any attempt to allocate a
value with a size greater than this will result in an error. The
initial default for this limit is set at 64k, this is based on a similar
limit that exists within the ada specific code.
It is possible for the user to set max-value-size to unlimited, in which
case the old behaviour is restored.
gdb/ChangeLog:
* value.c (max_value_size): New variable.
(MIN_VALUE_FOR_MAX_VALUE_SIZE): New define.
(show_max_value_size): New function.
(check_type_length_before_alloc): New function.
(allocate_value_contents): Call check_type_length_before_alloc.
(set_value_enclosing_type): Likewise.
(_initialize_values): Add set/show handler for max-value-size.
* NEWS: Mention new set/show command.
gdb/doc/ChangeLog:
* gdb.texinfo (Value Sizes): New section.
(Data): Add the 'Value Sizes' node to the menu.
gdb/testsuite/ChangeLog:
* gdb.base/max-value-size.c: New file.
* gdb.base/max-value-size.exp: New file.
* gdb.base/huge.exp: Disable max-value-size for this test.
Older versions of FreeBSD supported userland threading via a pure
user-space threading library (N threads scheduled on 1 process) and
a N:M model (N threads scheduled on M LWPs). However, modern FreeBSD
versions only support a M:M threading model where each user thread is
backed by a dedicated LWP. This thread target only supports this
threading model. It also uses ptrace to query and alter LWP state
directly rather than using libthread_db to simplify the implementation.
FreeBSD recently gained support for reporting LWP events (birth and death
of LWPs). GDB will use LWP events when present. For older systems it
fetches the list of LWPs in the to_update_thread_list target op to update
the list of threads on each stop.
This target supports scheduler locking by using ptrace to suspend
individual LWPs as necessary before resuming a process.
gdb/ChangeLog:
* configure.ac: Check for support for LWP names on FreeBSD.
* fbsd-nat.c [PT_LWPINFO] New variable debug_fbsd_lwp.
[TDP_RFPPWAIT || HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME]
(fbsd_fetch_kinfo_proc): Move function earlier.
[PT_LWPINFO] (fbsd_thread_alive): New function.
[PT_LWPINFO] (fbsd_pid_to_str): New function.
[HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME] (fbsd_thread_name): New function.
[PT_LWP_EVENTS] (fbsd_enable_lwp_events): New function.
[PT_LWPINFO] (fbsd_add_threads): New function.
[PT_LWPINFO] (fbsd_update_thread_list): New function.
[PT_LWPINFO] New variable super_resume.
[PT_LWPINFO] (resume_one_thread_cb): New function.
[PT_LWPINFO] (resume_all_threads_cb): New function.
[PT_LWPINFO] (fbsd_resume): New function.
(fbsd_remember_child): Save full ptid instead of plain pid.
(fbsd_is_child_pending): Return ptid of saved child process.
(fbsd_wait): Include lwp in returned ptid and switch to LWP ptid on
first stop.
[PT_LWP_EVENTS] Handle LWP events.
[TDP_RFPPWAIT] Include LWP in child ptid.
(fbsd_post_startup_inferior) [PT_LWP_EVENTS]: Enable LWP events.
(fbsd_post_attach) [PT_LWP_EVENTS]: Enable LWP events.
Add threads for existing processes.
(fbsd_nat_add_target) [PT_LWPINFO]: Set "to_thread_alive" to
"fbsd_thread_alive".
Set "to_pid_to_str" to "fbsd_pid_to_str".
[HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME]: Set "to_thread_name" to
"fbsd_thread_name".
[PT_LWPINFO]: Set "to_update_thread_list" to "fbsd_update_thread_list".
Set "to_has_thread_control" to "tc_schedlock".
Set "to_resume" to "fbsd_resume".
(_initialize_fbsd_nat): New function.
* configure: Regenerate.
* config.in: Regenerate.
gdb/doc/ChangeLog:
* gdb.texinfo (Debugging Output): Document "set/show debug fbsd-lwp".
This commit changes GDB like this:
- Program received signal SIGINT, Interrupt.
+ Thread 1 "main" received signal SIGINT, Interrupt.
- Breakpoint 1 at 0x40087a: file threads.c, line 87.
+ Thread 3 "bar" hit Breakpoint 1 at 0x40087a: file threads.c, line 87.
... once the program goes multi-threaded. Until GDB sees a second
thread spawn, the output is still the same as before, per the
discussion back in 2012:
https://www.sourceware.org/ml/gdb/2012-11/msg00010.html
This helps non-stop mode, where you can't easily tell which thread hit
a breakpoint or received a signal:
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fc1740 (LWP 19362) "main" (running)
2 Thread 0x7ffff7fc0700 (LWP 19366) "foo" (running)
3 Thread 0x7ffff77bf700 (LWP 19367) "bar" (running)
(gdb)
Program received signal SIGUSR1, User defined signal 1.
0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92
92 lll_wait_tid (pd->tid);
(gdb) b threads.c:87
Breakpoint 1 at 0x40087a: file threads.c, line 87.
(gdb)
Breakpoint 1, thread_function1 (arg=0x1) at threads.c:87
87 usleep (1); /* Loop increment. */
The best the user can do is run "info threads" and try to figure
things out.
It actually also affects all-stop mode, in case of "handle SIG print
nostop":
...
Program received signal SIGUSR1, User defined signal 1.
Program received signal SIGUSR1, User defined signal 1.
Program received signal SIGUSR1, User defined signal 1.
Program received signal SIGUSR1, User defined signal 1.
...
The above doesn't give any clue that these were different threads
getting the SIGUSR1 signal.
I initially thought of lowercasing "breakpoint" in
"Thread 3 hit Breakpoint 1"
but then after trying it I realized that leaving "Breakpoint"
uppercase helps the eye quickly find the relevant information. It's
also easier to implement not showing anything about threads until the
program goes multi-threaded this way.
Here's a larger example session in non-stop mode:
(gdb) c -a&
Continuing.
(gdb) interrupt -a
(gdb)
Thread 1 "main" stopped.
0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92
92 lll_wait_tid (pd->tid);
Thread 2 "foo" stopped.
0x0000003615ebc6ed in nanosleep () at ../sysdeps/unix/syscall-template.S:81
81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
Thread 3 "bar" stopped.
0x0000003615ebc6ed in nanosleep () at ../sysdeps/unix/syscall-template.S:81
81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
b threads.c:87
Breakpoint 4 at 0x40087a: file threads.c, line 87.
(gdb) b threads.c:67
Breakpoint 5 at 0x400811: file threads.c, line 67.
(gdb) c -a&
Continuing.
(gdb)
Thread 3 "bar" hit Breakpoint 4, thread_function1 (arg=0x1) at threads.c:87
87 usleep (1); /* Loop increment. */
Thread 2 "foo" hit Breakpoint 5, thread_function0 (arg=0x0) at threads.c:68
68 (*myp) ++;
info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fc1740 (LWP 31957) "main" (running)
2 Thread 0x7ffff7fc0700 (LWP 31961) "foo" thread_function0 (arg=0x0) at threads.c:68
3 Thread 0x7ffff77bf700 (LWP 31962) "bar" thread_function1 (arg=0x1) at threads.c:87
(gdb) shell kill -SIGINT 31957
(gdb)
Thread 1 "main" received signal SIGINT, Interrupt.
0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92
92 lll_wait_tid (pd->tid);
info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fc1740 (LWP 31957) "main" 0x0000003616a09237 in pthread_join (threadid=140737353877248, thread_return=0x7fffffffd5b8) at pthread_join.c:92
2 Thread 0x7ffff7fc0700 (LWP 31961) "foo" thread_function0 (arg=0x0) at threads.c:68
3 Thread 0x7ffff77bf700 (LWP 31962) "bar" thread_function1 (arg=0x1) at threads.c:87
(gdb) t 2
[Switching to thread 2, Thread 0x7ffff7fc0700 (LWP 31961)]
#0 thread_function0 (arg=0x0) at threads.c:68
68 (*myp) ++;
(gdb) catch syscall
Catchpoint 6 (any syscall)
(gdb) c&
Continuing.
(gdb)
Thread 2 "foo" hit Catchpoint 6 (call to syscall nanosleep), 0x0000003615ebc6ed in nanosleep () at ../sysdeps/unix/syscall-template.S:81
81 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
I'll work on documentation next if this looks agreeable.
This patch applies on top of the star wildcards thread IDs series:
https://sourceware.org/ml/gdb-patches/2016-01/msg00291.html
For convenience, I've pushed this to the
users/palves/show-which-thread-caused-stop branch.
gdb/doc/ChangeLog:
2016-01-18 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Threads): Mention that GDB displays the ID and name
of the thread that hit a breakpoint or received a signal.
gdb/ChangeLog:
2016-01-18 Pedro Alves <palves@redhat.com>
* NEWS: Mention that GDB now displays the ID and name of the
thread that hit a breakpoint or received a signal.
* break-catch-sig.c (signal_catchpoint_print_it): Use
maybe_print_thread_hit_breakpoint.
* break-catch-syscall.c (print_it_catch_syscall): Likewise.
* break-catch-throw.c (print_it_exception_catchpoint): Likewise.
* breakpoint.c (maybe_print_thread_hit_breakpoint): New function.
(print_it_catch_fork, print_it_catch_vfork, print_it_catch_solib)
(print_it_catch_exec, print_it_ranged_breakpoint)
(print_it_watchpoint, print_it_masked_watchpoint, bkpt_print_it):
Use maybe_print_thread_hit_breakpoint.
* breakpoint.h (maybe_print_thread_hit_breakpoint): Declare.
* gdbthread.h (show_thread_that_caused_stop): Declare.
* infrun.c (print_signal_received_reason): Print which thread
received signal.
* thread.c (show_thread_that_caused_stop): New function.
gdb/testsuite/ChangeLog:
2016-01-18 Pedro Alves <palves@redhat.com>
* gdb.base/async-shell.exp: Adjust expected output.
* gdb.base/dprintf-non-stop.exp: Adjust expected output.
* gdb.base/siginfo-thread.exp: Adjust expected output.
* gdb.base/watchpoint-hw-hit-once.exp: Adjust expected output.
* gdb.java/jnpe.exp: Adjust expected output.
* gdb.threads/clone-new-thread-event.exp: Adjust expected output.
* gdb.threads/continue-pending-status.exp: Adjust expected output.
* gdb.threads/leader-exit.exp: Adjust expected output.
* gdb.threads/manythreads.exp: Adjust expected output.
* gdb.threads/pthreads.exp: Adjust expected output.
* gdb.threads/schedlock.exp: Adjust expected output.
* gdb.threads/siginfo-threads.exp: Adjust expected output.
* gdb.threads/signal-command-multiple-signals-pending.exp: Adjust
expected output.
* gdb.threads/signal-delivered-right-thread.exp: Adjust expected
output.
* gdb.threads/sigthread.exp: Adjust expected output.
* gdb.threads/watchpoint-fork.exp: Adjust expected output.
Add support for specifying "all threads of inferior N", by writing "*"
as thread number/range in thread ID lists.
E.g., "info threads 2.*" or "thread apply 2.* bt".
gdb/ChangeLog:
2016-01-15 Pedro Alves <palves@redhat.com>
* NEWS: Mention star wildcard ranges.
* cli/cli-utils.c (get_number_or_range): Check state->in_range first.
(number_range_setup_range): New function.
* cli/cli-utils.h (number_range_setup_range): New declaration.
* thread.c (thread_apply_command): Support star TID ranges.
* tid-parse.c (tid_range_parser_finished)
(tid_range_parser_string, tid_range_parser_skip)
(get_tid_or_range, get_tid_or_range): Handle
TID_RANGE_STATE_STAR_RANGE.
(tid_range_parser_star_range): New function.
* tid-parse.h (enum tid_range_state) <TID_RANGE_STATE_STAR_RANGE>:
New value.
(tid_range_parser_star_range): New declaration.
gdb/doc/ChangeLog:
2016-01-15 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Threads) <thread ID lists>: Document star ranges.
gdb/testsuite/ChangeLog:
2016-01-15 Pedro Alves <palves@redhat.com>
* gdb.multi/tids.exp: Test star wildcard ranges.
This commit adds a new $_gthread convenience variable, that is like
$_thread, but holds the current thread's global thread id.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* NEWS: Mention $_gthread.
* gdbthread.h (struct thread_info) <global_num>: Mention
$_gthread.
* thread.c (thread_num_make_value_helper): New function.
(thread_id_make_value): Delete.
(thread_id_per_inf_num_make_value, global_thread_id_make_value):
New.
(thread_funcs): Adjust.
(gthread_funcs): New.
(_initialize_thread): Register $_gthread variable.
gdb/testsuite/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* gdb.base/default.exp: Expect $_gthread as well.
* gdb.multi/tids.exp: Test $_gthread.
* gdb.threads/thread-specific.exp: Test $_gthread.
gdb/doc/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Threads): Document the $_gthread convenience
variable.
(Convenience Vars): Likewise.
This commit adds a new Python InferiorThread.global_num attribute.
This can be used to pass the correct thread ID to Breakpoint.thread,
which takes a global thread ID, not a per-inferior thread number.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* NEWS: Mention InferiorThread.global_num.
* python/py-infthread.c (thpy_get_global_num): New function.
(thread_object_getset): Register "global_num".
gdb/testsuite/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* gdb.multi/tids.exp: Test InferiorThread.global_num and
Breakpoint.thread.
* gdb.python/py-infthread.exp: Test InferiorThread.global_num.
gdb/doc/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* python.texi (Breakpoints In Python) <Breakpoint.thread>: Add
anchor.
(Threads In Python): Document new InferiorThread.global_num
attribute.
This commit changes GDB to track thread numbers per-inferior. Then,
if you're debugging multiple inferiors, GDB displays
"inferior-num.thread-num" instead of just "thread-num" whenever it
needs to display a thread:
(gdb) info inferiors
Num Description Executable
1 process 6022 /home/pedro/gdb/tests/threads
* 2 process 6037 /home/pedro/gdb/tests/threads
(gdb) info threads
Id Target Id Frame
1.1 Thread 0x7ffff7fc2740 (LWP 6022) "threads" (running)
1.2 Thread 0x7ffff77c0700 (LWP 6028) "threads" (running)
1.3 Thread 0x7ffff7fc2740 (LWP 6032) "threads" (running)
2.1 Thread 0x7ffff7fc1700 (LWP 6037) "threads" (running)
2.2 Thread 0x7ffff77c0700 (LWP 6038) "threads" (running)
* 2.3 Thread 0x7ffff7fc2740 (LWP 6039) "threads" (running)
(gdb)
...
(gdb) thread 1.1
[Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
(gdb)
...
etc.
You can still use "thread NUM", in which case GDB infers you're
referring to thread NUM of the current inferior.
The $_thread convenience var and Python's InferiorThread.num attribute
are remapped to the new per-inferior thread number. It's a backward
compatibility break, but since it only matters when debugging multiple
inferiors, I think it's worth doing.
Because MI thread IDs need to be a single integer, we keep giving
threads a global identifier, _in addition_ to the per-inferior number,
and make MI always refer to the global thread IDs. IOW, nothing
changes from a MI frontend's perspective.
Similarly, since Python's Breakpoint.thread and Guile's
breakpoint-thread/set-breakpoint-thread breakpoint methods need to
work with integers, those are adjusted to work with global thread IDs
too. Follow up patches will provide convenient means to access
threads' global IDs.
To avoid potencially confusing users (which also avoids updating much
of the testsuite), if there's only one inferior and its ID is "1",
IOW, the user hasn't done anything multi-process/inferior related,
then the "INF." part of thread IDs is not shown. E.g,.:
(gdb) info inferiors
Num Description Executable
* 1 process 15275 /home/pedro/gdb/tests/threads
(gdb) info threads
Id Target Id Frame
* 1 Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40
(gdb) add-inferior
Added inferior 2
(gdb) info threads
Id Target Id Frame
* 1.1 Thread 0x7ffff7fc1740 (LWP 15275) "threads" main () at threads.c:40
(gdb)
No regressions on x86_64 Fedora 20.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* NEWS: Mention that thread IDs are now per inferior and global
thread IDs.
* Makefile.in (SFILES): Add tid-parse.c.
(COMMON_OBS): Add tid-parse.o.
(HFILES_NO_SRCDIR): Add tid-parse.h.
* ada-tasks.c: Adjust to use ptid_to_global_thread_id.
* breakpoint.c (insert_breakpoint_locations)
(remove_threaded_breakpoints, bpstat_check_breakpoint_conditions)
(print_one_breakpoint_location, set_longjmp_breakpoint)
(check_longjmp_breakpoint_for_call_dummy)
(set_momentary_breakpoint): Adjust to use global IDs.
(find_condition_and_thread, watch_command_1): Use parse_thread_id.
(until_break_command, longjmp_bkpt_dtor)
(breakpoint_re_set_thread, insert_single_step_breakpoint): Adjust
to use global IDs.
* dummy-frame.c (pop_dummy_frame_bpt): Adjust to use
ptid_to_global_thread_id.
* elfread.c (elf_gnu_ifunc_resolver_stop): Likewise.
* gdbthread.h (struct thread_info): Rename field 'num' to
'global_num. Add new fields 'per_inf_num' and 'inf'.
(thread_id_to_pid): Rename thread_id_to_pid to
global_thread_id_to_ptid.
(pid_to_thread_id): Rename to ...
(ptid_to_global_thread_id): ... this.
(valid_thread_id): Rename to ...
(valid_global_thread_id): ... this.
(find_thread_id): Rename to ...
(find_thread_global_id): ... this.
(ALL_THREADS, ALL_THREADS_BY_INFERIOR): Declare.
(print_thread_info): Add comment.
* tid-parse.h: New file.
* tid-parse.c: New file.
* infcmd.c (step_command_fsm_prepare)
(step_command_fsm_should_stop): Adjust to use the global thread
ID.
(until_next_command, until_next_command)
(finish_command_fsm_should_stop): Adjust to use the global thread
ID.
(attach_post_wait): Adjust to check the inferior number too.
* inferior.h (struct inferior) <highest_thread_num>: New field.
* infrun.c (handle_signal_stop)
(insert_exception_resume_breakpoint)
(insert_exception_resume_from_probe): Adjust to use the global
thread ID.
* record-btrace.c (record_btrace_open): Use global thread IDs.
* remote.c (process_initial_stop_replies): Also consider the
inferior number.
* target.c (target_pre_inferior): Clear the inferior's highest
thread num.
* thread.c (clear_thread_inferior_resources): Adjust to use the
global thread ID.
(new_thread): New inferior parameter. Adjust to use it. Set both
the thread's global ID and the thread's per-inferior ID.
(add_thread_silent): Adjust.
(find_thread_global_id): New.
(find_thread_id): Make static. Adjust to rename.
(valid_thread_id): Rename to ...
(valid_global_thread_id): ... this.
(pid_to_thread_id): Rename to ...
(ptid_to_global_thread_id): ... this.
(thread_id_to_pid): Rename to ...
(global_thread_id_to_ptid): ... this. Adjust.
(first_thread_of_process): Adjust.
(do_captured_list_thread_ids): Adjust to use global thread IDs.
(should_print_thread): New function.
(print_thread_info): Rename to ...
(print_thread_info_1): ... this, and add new show_global_ids
parameter. Handle it. Iterate over inferiors.
(print_thread_info): Reimplement as wrapper around
print_thread_info_1.
(show_inferior_qualified_tids): New function.
(print_thread_id): Use it.
(tp_array_compar): Compare inferior numbers too.
(thread_apply_command): Use tid_range_parser.
(do_captured_thread_select): Use parse_thread_id.
(thread_id_make_value): Adjust.
(_initialize_thread): Adjust "info threads" help string.
* varobj.c (struct varobj_root): Update comment.
(varobj_create): Adjust to use global thread IDs.
(value_of_root_1): Adjust to use global_thread_id_to_ptid.
* windows-tdep.c (display_tib): No longer accept an argument.
* cli/cli-utils.c (get_number_trailer): Make extern.
* cli/cli-utils.h (get_number_trailer): Declare.
(get_number_const): Adjust documentation.
* mi/mi-cmd-var.c (mi_cmd_var_update_iter): Adjust to use global
thread IDs.
* mi/mi-interp.c (mi_new_thread, mi_thread_exit)
(mi_on_normal_stop, mi_output_running_pid, mi_on_resume):
* mi/mi-main.c (mi_execute_command, mi_cmd_execute): Likewise.
* guile/scm-breakpoint.c (gdbscm_set_breakpoint_thread_x):
Likewise.
* python/py-breakpoint.c (bppy_set_thread): Likewise.
* python/py-finishbreakpoint.c (bpfinishpy_init): Likewise.
* python/py-infthread.c (thpy_get_num): Add comment and return the
per-inferior thread ID.
(thread_object_getset): Update comment of "num".
gdb/testsuite/ChangeLog:
2016-01-07 Pedro Alves <palves@redhat.com>
* gdb.base/break.exp: Adjust to output changes.
* gdb.base/hbreak2.exp: Likewise.
* gdb.base/sepdebug.exp: Likewise.
* gdb.base/watch_thread_num.exp: Likewise.
* gdb.linespec/keywords.exp: Likewise.
* gdb.multi/info-threads.exp: Likewise.
* gdb.threads/thread-find.exp: Likewise.
* gdb.multi/tids.c: New file.
* gdb.multi/tids.exp: New file.
gdb/doc/ChangeLog:
2016-01-07 Pedro Alves <palves@redhat.com>
* gdb.texinfo (Threads): Document per-inferior thread IDs,
qualified thread IDs, global thread IDs and thread ID lists.
(Set Watchpoints, Thread-Specific Breakpoints): Adjust to refer to
thread IDs.
(Convenience Vars): Document the $_thread convenience variable.
(Ada Tasks): Adjust to refer to thread IDs.
(GDB/MI Async Records, GDB/MI Thread Commands, GDB/MI Ada Tasking
Commands, GDB/MI Variable Objects): Update to mention global
thread IDs.
* guile.texi (Breakpoints In Guile)
<breakpoint-thread/set-breakpoint-thread breakpoint>: Mention
global thread IDs instead of thread IDs.
* python.texi (Threads In Python): Adjust documentation of
InferiorThread.num.
(Breakpoint.thread): Mention global thread IDs instead of thread
IDs.
Pedro Alves
Simon Marchi
Tom Tromey
Doug Evans
Antoine Tremblay
Anton Kolesov
Tim Wiederhake
Gabriel Krisman Bertazi
Руслан Ижбулатов
Yan-Ting Lin
Toshihito Kikuchi
Eli Zaretskii
Yao Qi
Andrew Burgess
Simon Marchi
Walfred Tedeschi
Marcin Kościelnicki
John Baldwin