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From: Jeroen N. W. <jn...@xs...> - 2005-08-26 17:30:50
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Just for a lark, I ran the program in my previous post under valgrind/memcheck 3.1.SVN. Unfortunately, this shows a possible problem in valgrind: the output of the printf on line 16 is produced twice. The output of valgrind -v appears below. Also unfortunately, I cannot get gdb to do useful things with the core produced under valgrind. Jeroen. ==3079== Memcheck, a memory error detector. ==3079== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al. ==3079== Using LibVEX rev 1362M, a library for dynamic binary translation. ==3079== Copyright (C) 2004-2005, and GNU GPL'd, by OpenWorks LLP. ==3079== Using valgrind-3.1.SVN, a dynamic binary instrumentation framework. ==3079== Copyright (C) 2000-2005, and GNU GPL'd, by Julian Seward et al. --3079-- Valgrind library directory: /home/jeroen/MirrorDirs/valgrind-testing/.in_place --3079-- Command line --3079-- ./makecoredump --3079-- Startup, with flags: --3079-- --command-line-only=yes --3079-- -v --3079-- --tool=memcheck --3079-- Contents of /proc/version: --3079-- Linux version 2.4.26-1-386 (horms@tabatha) (gcc version 3.2.3 (Debian)) #1 Tue Aug 24 13:31:19 JST 2004 --3079-- Reading syms from /home/jeroen/SourceDirs/miscellaneous/makecoredump/makecoredump (0x8048000) --3079-- Reading syms from /lib/ld-2.3.2.so (0x1B8E4000) --3079-- Reading debug info from /lib/ld-2.3.2.so... --3079-- ... CRC mismatch (computed E7117123 wanted 4ECF6D33) --3079-- object doesn't have a symbol table --3079-- Reading syms from /home/jeroen/MirrorDirs/valgrind-testing/coregrind/stage2 (0xB0000000) --3079-- Reading suppressions file: /home/jeroen/MirrorDirs/valgrind-testing/.in_place/default.supp ==3079== --3079-- Reading syms from /home/jeroen/MirrorDirs/valgrind-testing/coregrind/vgpreload_core.so (0x1B8FC000) --3079-- Reading syms from /home/jeroen/MirrorDirs/valgrind-testing/memcheck/vgpreload_memcheck.so (0x1B8FE000) --3079-- Reading syms from /lib/libc-2.3.2.so (0x1B912000) --3079-- Reading debug info from /lib/libc-2.3.2.so... --3079-- ... CRC mismatch (computed 76EC50B6 wanted 52619D67) --3079-- object doesn't have a symbol table --3079-- Reading syms from /lib/libdl-2.3.2.so (0x1BA45000) --3079-- Reading debug info from /lib/libdl-2.3.2.so... --3079-- ... CRC mismatch (computed 6F61513E wanted 280D08E5) --3079-- object doesn't have a symbol table --3079-- REDIR: 0x1B987FD0 (rindex) redirected to 0x1B901530 (rindex) ==3080== ==3080== Process terminating with default action of signal 3 (SIGQUIT): dumping core ==3080== at 0x1B93B7C1: kill (in /lib/libc-2.3.2.so) ==3080== by 0x804840E: dump_core (makecoredump.c:9) ==3080== by 0x8048431: main (makecoredump.c:17) About to dump ... done. About to dump ...--3080-- REDIR: 0x1B9830E0 (free) redirected to 0x1B900611 (free) ==3080== ==3080== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 1) --3080-- --3080-- supp: 16 Ugly strchr error in /lib/ld-2.3.2.so ==3080== malloc/free: in use at exit: 0 bytes in 0 blocks. ==3080== malloc/free: 0 allocs, 0 frees, 0 bytes allocated. ==3080== ==3080== No malloc'd blocks -- no leaks are possible. --3080-- memcheck: sanity checks: 0 cheap, 1 expensive --3080-- memcheck: auxmaps: 0 auxmap entries (0k, 0M) in use --3080-- memcheck: auxmaps: 0 searches, 0 comparisons --3080-- memcheck: secondaries: 9 issued (576k, 0M) --3080-- memcheck: secondaries: 17 accessible and distinguished (1088k, 1M) --3080-- tt/tc: 3304 tt lookups requiring 3349 probes --3080-- tt/tc: 3304 fast-cache updates, 2 flushes --3080-- translate: new 1652 (33593 -> 549152; ratio 163:10) [0 scs] --3080-- translate: dumped 0 (0 -> ??) --3080-- translate: discarded 0 (0 -> ??) --3080-- scheduler: 33053 jumps (bb entries). --3080-- scheduler: 0/1801 major/minor sched events. --3080-- sanity: 1 cheap, 1 expensive checks. --3080-- exectx: 4999 lists, 8 contexts (avg 0 per list) --3080-- exectx: 16 searches, 8 full compares (500 per 1000) --3080-- exectx: 0 cmp2, 44 cmp4, 0 cmpAll --3079-- REDIR: 0x1B9830E0 (free) redirected to 0x1B900611 (free) ==3079== ==3079== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 16 from 1) --3079-- --3079-- supp: 16 Ugly strchr error in /lib/ld-2.3.2.so ==3079== malloc/free: in use at exit: 0 bytes in 0 blocks. ==3079== malloc/free: 0 allocs, 0 frees, 0 bytes allocated. ==3079== ==3079== No malloc'd blocks -- no leaks are possible. --3079-- memcheck: sanity checks: 0 cheap, 1 expensive --3079-- memcheck: auxmaps: 0 auxmap entries (0k, 0M) in use --3079-- memcheck: auxmaps: 0 searches, 0 comparisons --3079-- memcheck: secondaries: 9 issued (576k, 0M) --3079-- memcheck: secondaries: 17 accessible and distinguished (1088k, 1M) --3079-- tt/tc: 3528 tt lookups requiring 3571 probes --3079-- tt/tc: 3528 fast-cache updates, 2 flushes --3079-- translate: new 1764 (35368 -> 579692; ratio 163:10) [0 scs] --3079-- translate: dumped 0 (0 -> ??) --3079-- translate: discarded 0 (0 -> ??) --3079-- scheduler: 33985 jumps (bb entries). --3079-- scheduler: 0/1912 major/minor sched events. --3079-- sanity: 1 cheap, 1 expensive checks. --3079-- exectx: 4999 lists, 8 contexts (avg 0 per list) --3079-- exectx: 16 searches, 8 full compares (500 per 1000) --3079-- exectx: 0 cmp2, 44 cmp4, 0 cmpAll |