Since a few days exp-drd now crashes on every program that I try to
analyze. This crash did not yet occur with Valgrind version 3.3.0 but
does occur with revision 7307. The relevant call stack is shown below.
Is this due to exp-drd or due to the post-3.3.0 changes ?
$ ./debug-in-place --tool=exp-drd exp-drd/tests/fp_race
(gdb) run --tool=exp-drd exp-drd/tests/fp_race
Starting program:
/home/bart/software/valgrind-svn/.in_place/amd64-linux/exp-drd
--tool=exp-drd exp-drd/tests/fp_race
==17491== exp-drd, a data race detector.
==17491== NOTE: This is an Experimental-Class Valgrind Tool.
==17491== Copyright (C) 2006-2007, and GNU GPL'd, by Bart Van Assche.
==17491== Using LibVEX rev 1803, a library for dynamic binary translation.
==17491== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==17491== Using valgrind-3.4.0.SVN, a dynamic binary instrumentation framework.
==17491== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==17491== For more details, rerun with: -v
==17491==
Program received signal SIGSEGV, Segmentation fault.
vgPlain_get_StackTrace2 (tid_if_known=<value optimized out>, ips=0x389113f0,
n_ips=12, ip=0, sp=0, fp=0, lr=0, fp_min=0, fp_max_orig=0)
at m_stacktrace.c:230
230 ip = (((UWord*)fp)[1]);
(gdb) where
#0 vgPlain_get_StackTrace2 (tid_if_known=<value optimized out>,
ips=0x389113f0, n_ips=12, ip=0, sp=0, fp=0, lr=0, fp_min=0, fp_max_orig=0)
at m_stacktrace.c:230
#1 0x000000003801aada in vgPlain_get_StackTrace (tid=1, ips=0x389113f0,
n_ips=12, first_ip_delta=<value optimized out>) at m_stacktrace.c:437
#2 0x00000000380099d6 in record_ExeContext_wrk (tid=1, first_ip_delta=0,
first_ip_only=0 '\0') at m_execontext.c:309
#3 0x0000000038004ef9 in sg_init (sg=0x402001380, creator=0, created=1)
at drd_segment.c:68
#4 0x0000000038004fd7 in sg_new (creator=0, created=1) at drd_segment.c:110
#5 0x0000000038006ce7 in thread_pre_create (creator=0, vg_created=1)
at drd_thread.c:222
#6 0x0000000038002a0c in drd_pre_thread_create (creator=0, created=1)
at drd_main.c:323
#7 0x00000000380106cd in valgrind_main (argc=<value optimized out>,
argv=<value optimized out>, envp=0x7fffa1083d68) at m_main.c:1756
#8 0x00000000380122de in _start_in_C_linux (pArgc=0x7fffa1083d40)
at m_main.c:2369
#9 0x000000003800f1a1 in _start ()
--
Regards,
Bart Van Assche.
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