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* [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
@ 2012-04-24 22:45 gdb.bugs at mfriebe dot de
2012-04-28 14:02 ` [Bug win32/14018] " gdb.bugs at mfriebe dot de
` (10 more replies)
0 siblings, 11 replies; 12+ messages in thread
From: gdb.bugs at mfriebe dot de @ 2012-04-24 22:45 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=14018
Bug #: 14018
Summary: Win32 fails to continue with "winerr 5" (pc register
not available) after SigTrap while process paused
Product: gdb
Version: 7.4
Status: NEW
Severity: normal
Priority: P2
Component: gdb
AssignedTo: unassigned@sourceware.org
ReportedBy: gdb.bugs@mfriebe.de
Classification: Unclassified
Created attachment 6366
--> http://sourceware.org/bugzilla/attachment.cgi?id=6366
pascal (src and bin) for reproducing
This bug appears to be a regression. It is present it 7.3 and 7.4. But was not
in previous 7.x)
On Windows in order to pause a running process for debugging, it is custom to
call
CreateRemoteThread(handle_to_debugged_process, 0,0, GetProcAddress(hMod,
'DebugBreak') ...)
This leads to GDB reporting:
*stopped,reason="signal-received",signal-name="SIGTRAP",signal-meaning="Trace/breakpoint
trap",frame=
However if the above happens, while the app is already paused (e.g. after
reaching a breakpoint) then the app can not be continued.
This can not always be avoided. It may happen as a race condition, where the
breakpoint is hit, just before the signal could be sent.
The first continue will correctly lead to another pause/interrupt reporting the
SigTrap.
Trying to continue from this will report
-exec-continue
&"warning: SuspendThread failed. (winerr 5)\n"
^error,msg="PC register is not available"
-exec-continue
&"warning: SuspendThread failed. (winerr 5)\n"
^error,msg="PC register is not available"
**** To reproduce (using Free Pascal) Win 32 / Vista (probably any other too)
intel
I have included a helper app (in pascal) to trigger the SigTrap (source and
bin).
Compile with: fpc.exe dbgbrk.pas
The app to be debugged is test.exe
compile: fpc.exe -g test.pas
Run gdb:
gdb -i mi test.exe
-break-insert test.pas:4
-exec-run
~"Starting program: B:\\dbg\\test.exe \n"
=thread-group-started,id="i1",pid="8372"
=thread-created,id="1",group-id="i1"
~"[New Thread 8372.0x26c4]\n"
....
*stopped,reason="breakpoint-hit",disp="keep",bkptno="1",frame={addr="0x004013f9",func="FOO"
Take the PID reported by gdb (in the example 8372) and run (while the app is
paused at the break point)
dbgbrk.exe 8372
-exec-continue
^running
....
*stopped,reason="signal-received",signal-name="SIGTRAP",signal-meaning="Trace/breakpoint
trap",
-exec-continue
^running
....
&"warning: SuspendThread failed. (winerr 5)\n"
^error,msg="PC register is not available"
-exec-continue
&"warning: SuspendThread failed. (winerr 5)\n"
^error,msg="PC register is not available"
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
@ 2012-04-28 14:02 ` gdb.bugs at mfriebe dot de
2012-11-01 14:39 ` andre.poenitz at digia dot com
` (9 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: gdb.bugs at mfriebe dot de @ 2012-04-28 14:02 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=14018
Martin <gdb.bugs at mfriebe dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|gdb |win32
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
2012-04-28 14:02 ` [Bug win32/14018] " gdb.bugs at mfriebe dot de
@ 2012-11-01 14:39 ` andre.poenitz at digia dot com
2013-09-09 13:27 ` orgads at gmail dot com
` (8 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: andre.poenitz at digia dot com @ 2012-11-01 14:39 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=14018
Andre Poenitz <andre.poenitz at digia dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andre.poenitz at digia dot
| |com
--- Comment #1 from Andre Poenitz <andre.poenitz at digia dot com> 2012-11-01 14:39:38 UTC ---
Also reported for GDB 7.4.1, Windows XP SP3, see
https://bugreports.qt-project.org/browse/QTCREATORBUG-7840
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
2012-04-28 14:02 ` [Bug win32/14018] " gdb.bugs at mfriebe dot de
2012-11-01 14:39 ` andre.poenitz at digia dot com
@ 2013-09-09 13:27 ` orgads at gmail dot com
2013-11-21 14:35 ` david.schulz at digia dot com
` (7 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: orgads at gmail dot com @ 2013-09-09 13:27 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=14018
Orgad Shaneh <orgads at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |orgads at gmail dot com
--- Comment #2 from Orgad Shaneh <orgads at gmail dot com> ---
Still happens with 7.6.1 on Windows 7.
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (2 preceding siblings ...)
2013-09-09 13:27 ` orgads at gmail dot com
@ 2013-11-21 14:35 ` david.schulz at digia dot com
2013-11-21 14:49 ` brobecker at gnat dot com
` (6 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: david.schulz at digia dot com @ 2013-11-21 14:35 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
David Schulz <david.schulz at digia dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |david.schulz at digia dot com
--- Comment #3 from David Schulz <david.schulz at digia dot com> ---
Can also be reproduced with the following C++ Code:
#include <windows.h>
int main()
{
while (true)
DebugBreakProcess(GetCurrentProcess());
}
Start gdb:
gdb -ex run <Executable of the code above>.exe
After startup enter:
break main.cpp:6
command
continue
end
handle SIGTRAP nostop
continue
After some lines telling you that the program received a SIGTRAP the following
error is shown:
&"warning: SuspendThread failed. (winerr 5)\n"
^error,msg="PC register is not available"
The breakpoint is important because SuspendThread is just called when the gdb
requests the thread contexts (see gdb/windows-nat.c:thread_rec()).
The gdb commands and the code above actually emulates the QtCreator which
inserts a breakpoint to a running inferior, and this breakpoint is hit directly
after it was inserted.
To give you a time line of the QtCreator behavior:
- everything runs (QtCreator, gdb, inferior)
- request insert breakpoint
- interrupt inferior
- wait for gdb to tell QtCreator it has stopped
- insert breakpoint
- tell the gdb to continue execution
- breakpoint in inferior is hit
- BOOM: gdb stops with the error message: PC register is not available
The actual problem is that the gdb has not the rights to suspend the Thread
(winerr 5 == ERROR_ACCESS_DENIED). As the only threads in this process are the
main thread and the DebugBreak threads it looks like the gdb has not the rights
to suspend the DebugBreak threads in some states (it occures not on every break
so it has to be a special thread state).
A possible Solution could be to check if you have the rights to suspend that
thread (should be done anyway according to the documentation:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms686345(v=vs.85).aspx).
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (3 preceding siblings ...)
2013-11-21 14:35 ` david.schulz at digia dot com
@ 2013-11-21 14:49 ` brobecker at gnat dot com
2014-04-19 8:20 ` cvs-commit at gcc dot gnu.org
` (5 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: brobecker at gnat dot com @ 2013-11-21 14:49 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
Joel Brobecker <brobecker at gnat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |brobecker at gnat dot com
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (4 preceding siblings ...)
2013-11-21 14:49 ` brobecker at gnat dot com
@ 2014-04-19 8:20 ` cvs-commit at gcc dot gnu.org
2014-04-19 8:27 ` cvs-commit at gcc dot gnu.org
` (4 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2014-04-19 8:20 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gdb and binutils".
The branch, master has been updated
via 17617f2d366ca969ccbc784be4f75931a1afd20f (commit)
from 5723a6fd0636bed6d278ab19f6ead31d748a7a78 (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=17617f2d366ca969ccbc784be4f75931a1afd20f
commit 17617f2d366ca969ccbc784be4f75931a1afd20f
Author: Eli Zaretskii <eliz@gnu.org>
Date: Sat Apr 19 11:12:19 2014 +0300
PR gdb/14018 -- avoid "PC register not available" errors.
gdb/windows-nat.c (thread_rec): Don't display a warning when
SuspendThread fails with ERROR_ACCESS_DENIED. If SuspendThread
fails for any reason, set th->suspended to -1, so that we don't
try to resume such a thread. Also, don't return NULL in these
cases, to avoid completely ruin the session due to "PC register is
not available" error.
(do_windows_fetch_inferior_registers): Check errors in
GetThreadContext call.
(windows_continue): Accept an additional argument KILLED; if not
zero, ignore errors in the SetThreadContext call, since the
inferior was killed and is shutting down.
(windows_resume, get_windows_debug_event)
(windows_create_inferior, windows_mourn_inferior)
(windows_kill_inferior): All callers of windows_continue changed
to adjust to its new calling sequence.
-----------------------------------------------------------------------
Summary of changes:
gdb/ChangeLog | 19 +++++++++++++++++++
gdb/windows-nat.c | 49 +++++++++++++++++++++++++++++++++----------------
2 files changed, 52 insertions(+), 16 deletions(-)
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (5 preceding siblings ...)
2014-04-19 8:20 ` cvs-commit at gcc dot gnu.org
@ 2014-04-19 8:27 ` cvs-commit at gcc dot gnu.org
2014-04-21 15:40 ` brobecker at gnat dot com
` (3 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2014-04-19 8:27 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
--- Comment #5 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gdb and binutils".
The branch, gdb-7.7-branch has been updated
via 230109e7ff8ad9b1268d251cba1fa26a24efde64 (commit)
from b4a18502ba8e066d0862ecc0ce5bb4d16eafdbbf (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=230109e7ff8ad9b1268d251cba1fa26a24efde64
commit 230109e7ff8ad9b1268d251cba1fa26a24efde64
Author: Eli Zaretskii <eliz@gnu.org>
Date: Sat Apr 19 11:12:19 2014 +0300
PR gdb/14018 -- avoid "PC register not available" errors.
gdb/windows-nat.c (thread_rec): Don't display a warning when
SuspendThread fails with ERROR_ACCESS_DENIED. If SuspendThread
fails for any reason, set th->suspended to -1, so that we don't
try to resume such a thread. Also, don't return NULL in these
cases, to avoid completely ruin the session due to "PC register is
not available" error.
(do_windows_fetch_inferior_registers): Check errors in
GetThreadContext call.
(windows_continue): Accept an additional argument KILLED; if not
zero, ignore errors in the SetThreadContext call, since the
inferior was killed and is shutting down.
(windows_resume, get_windows_debug_event)
(windows_create_inferior, windows_mourn_inferior)
(windows_kill_inferior): All callers of windows_continue changed
to adjust to its new calling sequence.
-----------------------------------------------------------------------
Summary of changes:
gdb/ChangeLog | 19 +++++++++++++++++++
gdb/windows-nat.c | 49 +++++++++++++++++++++++++++++++++----------------
2 files changed, 52 insertions(+), 16 deletions(-)
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (6 preceding siblings ...)
2014-04-19 8:27 ` cvs-commit at gcc dot gnu.org
@ 2014-04-21 15:40 ` brobecker at gnat dot com
2014-05-05 21:54 ` cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: brobecker at gnat dot com @ 2014-04-21 15:40 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
Joel Brobecker <brobecker at gnat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Joel Brobecker <brobecker at gnat dot com> ---
As per commits.
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (7 preceding siblings ...)
2014-04-21 15:40 ` brobecker at gnat dot com
@ 2014-05-05 21:54 ` cvs-commit at gcc dot gnu.org
2021-09-22 16:58 ` mervegunesli at aol dot com
2021-09-22 17:04 ` mark at klomp dot org
10 siblings, 0 replies; 12+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2014-05-05 21:54 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
--- Comment #7 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gdb and binutils".
The annotated tag, gdb-7.7.1-release has been created
at af2cd04ccdd7631f4009b2aef5c8402b97d732e6 (tag)
tagging 4bd8fc3a1362970d9800a263987af8093798338b (commit)
replaces gdb-7.7-release
tagged by Joel Brobecker
on Mon May 5 14:53:19 2014 -0700
- Log -----------------------------------------------------------------
GDB 7.7.1 Release.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)
iEYEABECAAYFAlNoCE8ACgkQku2wS/8yXPMbgQCgiCmLYGN3tjnqEEc0Y0i4iCHj
RN8AnRgphFx5RnfZ5TSUHgC6mVHel7sC
=xfEO
-----END PGP SIGNATURE-----
Eli Zaretskii (1):
PR gdb/14018 -- avoid "PC register not available" errors.
GDB Administrator (88):
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Automatic date update in version.in
Jan Kratochvil (3):
Fix Python stack corruption
PR gdb/16626
PR gdb/16626
Joel Brobecker (3):
Document the GDB 7.7 release in gdb/ChangeLog
Bump GDB version number to 7.7.0.DATE-cvs.
Set GDB version number to 7.7.1.
Nick Clifton (1):
Following up on Tom's suggestion I am checking in a patch to replace the
various
Pedro Alves (3):
Make sure we don't resume the stepped thread by accident.
PR gdb/16575: stale breakpoint instructions in the code cache
AIX 32-bit core loading, high section addresses.
Pierre Langlois (1):
Erroneous backtrace on AVR.
Rainer Orth (1):
PR build/16550
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (8 preceding siblings ...)
2014-05-05 21:54 ` cvs-commit at gcc dot gnu.org
@ 2021-09-22 16:58 ` mervegunesli at aol dot com
2021-09-22 17:04 ` mark at klomp dot org
10 siblings, 0 replies; 12+ messages in thread
From: mervegunesli at aol dot com @ 2021-09-22 16:58 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
Merve Gunesli <mervegunesli at aol dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mervegunesli at aol dot com
--- Comment #8 from Merve Gunesli <mervegunesli at aol dot com> ---
http://www.acpirateradio.co.uk/category/tech/
http://www.logoarts.co.uk/tech/nvidia-and-samsung/
http://www.slipstone.co.uk/computers/latest-car-deals/
http://connstr.net/category/computers/
http://joerg.li/category/services/
http://www.jopspeech.com/travel/london/
http://www.compilatori.com/category/health/
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* [Bug win32/14018] Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused
2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
` (9 preceding siblings ...)
2021-09-22 16:58 ` mervegunesli at aol dot com
@ 2021-09-22 17:04 ` mark at klomp dot org
10 siblings, 0 replies; 12+ messages in thread
From: mark at klomp dot org @ 2021-09-22 17:04 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14018
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mark at klomp dot org
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2012-04-24 22:45 [Bug gdb/14018] New: Win32 fails to continue with "winerr 5" (pc register not available) after SigTrap while process paused gdb.bugs at mfriebe dot de
2012-04-28 14:02 ` [Bug win32/14018] " gdb.bugs at mfriebe dot de
2012-11-01 14:39 ` andre.poenitz at digia dot com
2013-09-09 13:27 ` orgads at gmail dot com
2013-11-21 14:35 ` david.schulz at digia dot com
2013-11-21 14:49 ` brobecker at gnat dot com
2014-04-19 8:20 ` cvs-commit at gcc dot gnu.org
2014-04-19 8:27 ` cvs-commit at gcc dot gnu.org
2014-04-21 15:40 ` brobecker at gnat dot com
2014-05-05 21:54 ` cvs-commit at gcc dot gnu.org
2021-09-22 16:58 ` mervegunesli at aol dot com
2021-09-22 17:04 ` mark at klomp dot org
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