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[Bug python/21048] New: backtrace is broken on i686
- From: "jan.kratochvil at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Fri, 13 Jan 2017 08:10:10 +0000
- Subject: [Bug python/21048] New: backtrace is broken on i686
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=21048
Bug ID: 21048
Summary: backtrace is broken on i686
Product: gdb
Version: 7.12
Status: NEW
Severity: normal
Priority: P2
Component: python
Assignee: unassigned at sourceware dot org
Reporter: jan.kratochvil at redhat dot com
Target Milestone: ---
https://bugzilla.redhat.com/show_bug.cgi?id=1411094
Hironobu Ishii 2017-01-08 11:58:16 CET
Description of problem:
On i686 (or 32-bit machine), bt does not work.
Applying following upstream commit solved this bug in my environment.
Fix some error-handling bugs in python frame filters
http://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=30a7bb833cbd848b1814f18b91dfdafba4e86839
Version-Release number of selected component (if applicable):
gdb-7.12-29.fc25
How reproducible:
Always, but it seems to depend on core complexity or something.
Steps to Reproduce:
1. Run firefox and gcore firefox.
2. gdb /usr/lib/firefox/firefox core.XXX
3. bt in gdb
Actual results:
(gdb) bt
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
#0 0xffffffff in #1 0xffffffff in
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Python Exception <class 'SystemError'> <built-in function isinstance> returned
a result with an error set:
Expected results:
This log was collected after applying the upstream patch.
(gdb) bt
#0 0xb7730d05 in __kernel_vsyscall ()
#1 0xb73f655f in poll () at ../sysdeps/unix/syscall-template.S:84
#2 0xb6123f4c in poll (__timeout=-1, __nfds=5, __fds=0xa2930100)
at /usr/include/bits/poll2.h:46
#3 0xb6123f4c in g_poll (fds=0xa2930100, nfds=5, timeout=-1) at gpoll.c:124
#4 0xb2cb07ba in PollWrapper(GPollFD*, guint, gint)
(ufds=ufds@entry=0xa2930100, nfsd=nfsd@entry=5, timeout_=timeout_@entry=-1)
at
/usr/src/debug/firefox-50.1.0/firefox-50.1.0/widget/gtk/nsAppShell.cpp:42
#5 0xb61136e8 in g_main_context_poll (priority=<optimized out>, n_fds=5,
fds=0xa2930100, timeout=<optimized out>, context=0xb712da90) at gmain.c:4228
#6 0xb61136e8 in g_main_context_iterate (context=context@entry=0xb712da90,
block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at
gmain.c:3924
#7 0xb6113837 in g_main_context_iteration (context=0xb712da90, may_block=1)
at gmain.c:3990
#8 0xb2cb0847 in nsAppShell::ProcessNextNativeEvent(bool) (this=0xa9749b50,
mayWait=true)
at
/usr/src/debug/firefox-50.1.0/firefox-50.1.0/widge/gtk/nsAppShell.cpp:270
Additional info:
This bug is also repoted in debian.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=814558
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