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[bug #24867] `define' should be thread-safe
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From: |
Linas Vepstas |
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Subject: |
[bug #24867] `define' should be thread-safe |
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Date: |
Thu, 26 Dec 2013 00:08:38 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/28.0.1500.71 Chrome/28.0.1500.71 Safari/537.36 |
Follow-up Comment #13, bug #24867 (project guile):
To answer my own question:
-- compile test case below, as:
cc define-race.c -lpthread -lguile-2.0 -I/usr/include/guile/2.0
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff5d44700 (LWP 7601)]
0x00007ffff7243bc9 in GC_push_all_eager () from /usr/lib/libgc.so.1
(gdb) bt
#0 0x00007ffff7243bc9 in GC_push_all_eager () from /usr/lib/libgc.so.1
#1 0x00007ffff724bee1 in GC_push_all_stacks () from /usr/lib/libgc.so.1
#2 0x00007ffff7244733 in GC_mark_some () from /usr/lib/libgc.so.1
#3 0x00007ffff723b802 in GC_stopped_mark () from /usr/lib/libgc.so.1
#4 0x00007ffff723bf0a in GC_try_to_collect_inner () from /usr/lib/libgc.so.1
#5 0x00007ffff72465d0 in GC_init_inner () from /usr/lib/libgc.so.1
#6 0x00007ffff78af793 in ?? () from /usr/lib/libguile-2.0.so.22
#7 0x00007ffff78be9a8 in ?? () from /usr/lib/libguile-2.0.so.22
#8 0x00007ffff79118f0 in ?? () from /usr/lib/libguile-2.0.so.22
#9 0x00007ffff7911927 in ?? () from /usr/lib/libguile-2.0.so.22
#10 0x00007ffff72461e5 in GC_call_with_stack_base () from /usr/lib/libgc.so.1
#11 0x00007ffff7911ae8 in scm_with_guile () from /usr/lib/libguile-2.0.so.22
#12 0x0000000000400b2e in definer ()
#13 0x00007ffff7bc4e9a in start_thread (arg=0x7ffff5d44700) at
pthread_create.c:308
#14 0x00007ffff75793fd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()
This is with
$ guile --version
guile (GNU Guile) 2.0.5-deb+1-1
installed on an Ubuntu Precise system
The corresponding GC seems to be froom a package called
libgc1c2 - conservative garbage collector for C and C++
which installs libgc.so.1.0.3
The last entry in the ChangeLog is
libgc (1:7.1-8ubuntu0.12.04.1) precise-security; urgency=low
so this seems to be the bdwgc version 7.1
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