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From: Bill H. <bil...@ki...> - 2009-12-22 15:25:32
|
If you have a program that uses fork and exec and the exec fails and you
call _exit, then valgrind reports all memory used as leaks. Here is a
simple test case:
foo.c:
#include <stdlib.h>
#include <unistd.h>
int main()
{
void* v = malloc(10);
int pid = fork();
if(pid == 0)
{
#ifdef LEAK
_exit(1);
#endif
}
free(v);
return 0;
}
gcc -DLEAK foo.c
valgrind -q --leak-check=full --show-reachable=yes -v ./a.out
HEAP SUMMARY:
==22620== in use at exit: 10 bytes in 1 blocks
==22620== total heap usage: 1 allocs, 0 frees, 10 bytes allocated
==22620==
==22620== 10 bytes in 1 blocks are still reachable in loss record 1 of 1
==22620== at 0x4C221A7: malloc (vg_replace_malloc.c:195)
==22620== by 0x4005DD: main (in
/home/hoffman/MyBuilds/CMake-nighly-build/a.out)
==22620==
gcc foo.c
valgrind -q --leak-check=full --show-reachable=yes -v ./a.out
==22664== HEAP SUMMARY:
==22664== in use at exit: 0 bytes in 0 blocks
==22664== total heap usage: 1 allocs, 1 frees, 10 bytes allocated
--
Bill Hoffman
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065
bil...@ki...
http://www.kitware.com
518 881-4905 (Direct)
518 371-3971 x105
Fax (518) 371-4573
|
|
From: Bill H. <bil...@ki...> - 2009-12-22 14:15:44
|
Bill Hoffman wrote: > If you have a program that uses fork and exec and the exec fails and you > call _exit, then valgrind reports all memory used as leaks. Here is a > simple test case: > > RTFM.... --child-silent-after-fork=yes seems to be the option I was missing. Sorry for the noise. -Bill |
|
From: Alexander P. <gl...@go...> - 2009-12-22 09:31:41
|
Nightly build on mcgrind ( Darwin 9.7.0 i386 ) Started at 2009-12-22 09:06:00 MSK Ended at 2009-12-22 09:24:34 MSK Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 433 tests, 22 stderr failures, 1 stdout failure, 0 post failures == memcheck/tests/null_socket (stdout) memcheck/tests/origin5-bz2 (stderr) memcheck/tests/varinfo1 (stderr) memcheck/tests/varinfo2 (stderr) memcheck/tests/varinfo3 (stderr) memcheck/tests/varinfo4 (stderr) memcheck/tests/varinfo5 (stderr) memcheck/tests/varinfo6 (stderr) none/tests/async-sigs (stderr) none/tests/faultstatus (stderr) none/tests/pth_blockedsig (stderr) helgrind/tests/hg03_inherit (stderr) helgrind/tests/hg04_race (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/rwlock_race (stderr) helgrind/tests/tc01_simple_race (stderr) helgrind/tests/tc05_simple_race (stderr) helgrind/tests/tc06_two_races (stderr) helgrind/tests/tc06_two_races_xml (stderr) helgrind/tests/tc16_byterace (stderr) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc23_bogus_condwait (stderr) -- Alexander Potapenko Software Engineer Google Moscow |
|
From: Tom H. <to...@co...> - 2009-12-22 08:30:10
|
On 22/12/09 04:23, NODA, Kai wrote: > At this time, spe_program_load() in libspe2 returns "No such process" error. > > http://valgrind.org/docs/manual/dist.news.html says >> Release 3.4.0 (2 January 2009) > ... >> 167288 Patch file for missing system calls on Cell BE > > I believe this was done by incorporating the patch in > http://bugs.kde.org/show_bug.cgi?id=167288 > > Does the error shown above mean that the patch doesn't keep up > with changes in the Valgrind core? > If so, how can I modify it so that Memcheck works on Cell/B.E. ? That patch is only for ppc32 but it looks like you're running a 64 bit program. > Is it necessary to modify coregrind/m_syswrap/syswrap-ppc64-linux.c > as done in the rev. 8731 ? Basically, yes. Tom -- Tom Hughes (to...@co...) http://www.compton.nu/ |
|
From: Bart V. A. <bar...@gm...> - 2009-12-22 08:29:23
|
Nightly build on cellbuzz-native ( cellbuzz, ppc64, Fedora 7, native ) Started at 2009-12-22 02:00:05 EST Ended at 2009-12-22 03:28:57 EST Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... done Regression test results follow == 449 tests, 45 stderr failures, 10 stdout failures, 0 post failures == memcheck/tests/deep_templates (stdout) memcheck/tests/leak-cases-full (stderr) memcheck/tests/leak-cases-summary (stderr) memcheck/tests/leak-cycle (stderr) memcheck/tests/linux/timerfd-syscall (stdout) memcheck/tests/linux-syscalls-2007 (stderr) memcheck/tests/origin5-bz2 (stderr) memcheck/tests/partiallydefinedeq (stderr) memcheck/tests/varinfo1 (stderr) memcheck/tests/varinfo2 (stderr) memcheck/tests/varinfo3 (stderr) memcheck/tests/varinfo4 (stderr) memcheck/tests/varinfo5 (stderr) memcheck/tests/varinfo6 (stderr) memcheck/tests/wrap8 (stdout) memcheck/tests/wrap8 (stderr) none/tests/empty-exe (stderr) none/tests/linux/mremap (stderr) none/tests/ppc32/jm-fp (stdout) none/tests/ppc32/jm-vmx (stdout) none/tests/ppc32/round (stdout) none/tests/ppc32/test_gx (stdout) none/tests/ppc64/jm-fp (stdout) none/tests/ppc64/jm-vmx (stdout) none/tests/ppc64/round (stdout) none/tests/shell_valid2 (stderr) none/tests/shell_valid3 (stderr) none/tests/shell_zerolength (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/tc06_two_races_xml (stderr) helgrind/tests/tc22_exit_w_lock (stderr) helgrind/tests/tc23_bogus_condwait (stderr) drd/tests/tc23_bogus_condwait (stderr) exp-ptrcheck/tests/bad_percentify (stderr) exp-ptrcheck/tests/base (stderr) exp-ptrcheck/tests/ccc (stderr) exp-ptrcheck/tests/fp (stderr) exp-ptrcheck/tests/globalerr (stderr) exp-ptrcheck/tests/hackedbz2 (stderr) exp-ptrcheck/tests/hp_bounds (stderr) exp-ptrcheck/tests/hp_dangle (stderr) exp-ptrcheck/tests/hsg (stderr) exp-ptrcheck/tests/justify (stderr) exp-ptrcheck/tests/partial_bad (stderr) exp-ptrcheck/tests/partial_good (stderr) exp-ptrcheck/tests/preen_invars (stderr) exp-ptrcheck/tests/pth_create (stderr) exp-ptrcheck/tests/pth_specific (stderr) exp-ptrcheck/tests/realloc (stderr) exp-ptrcheck/tests/stackerr (stderr) exp-ptrcheck/tests/strcpy (stderr) exp-ptrcheck/tests/supp (stderr) exp-ptrcheck/tests/tricky (stderr) exp-ptrcheck/tests/unaligned (stderr) exp-ptrcheck/tests/zero (stderr) |
|
From: NODA, K. <no...@gm...> - 2009-12-22 04:24:10
|
Hi, all I tried to use Memcheck on Cell/B.E., but got the following error: > --18696-- WARNING: unhandled syscall: 279 > ==18696== at 0x80C92207A0: syscall (in /lib64/libc-2.5.so) > ==18696== by 0x80C92FAEAB: _base_spe_context_create (in /usr/lib64/libspe2.so.2.2.80) > ==18696== by 0x80C92FA23B: spe_context_create (in /usr/lib64/libspe2.so.2.2.80) > ==18696== by 0x10001477: main (in /home/k_noda/crank-nicholson/wrapper) > --18696-- You may be able to write your own handler. > --18696-- Read the file README_MISSING_SYSCALL_OR_IOCTL. > --18696-- Nevertheless we consider this a bug. Please report > --18696-- it at http://valgrind.org/support/bug_reports.html. ... > spu_create(): Function not implemented At this time, spe_program_load() in libspe2 returns "No such process" error. http://valgrind.org/docs/manual/dist.news.html says > Release 3.4.0 (2 January 2009) ... > 167288 Patch file for missing system calls on Cell BE I believe this was done by incorporating the patch in http://bugs.kde.org/show_bug.cgi?id=167288 Does the error shown above mean that the patch doesn't keep up with changes in the Valgrind core? If so, how can I modify it so that Memcheck works on Cell/B.E. ? Is it necessary to modify coregrind/m_syswrap/syswrap-ppc64-linux.c as done in the rev. 8731 ? Any advice is welcome. Thanks, Kai |
|
From: Tom H. <th...@cy...> - 2009-12-22 03:49:30
|
Nightly build on lloyd ( x86_64, Fedora 7 ) Started at 2009-12-22 03:05:06 GMT Ended at 2009-12-22 03:49:04 GMT Results unchanged from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 531 tests, 2 stderr failures, 0 stdout failures, 0 post failures == memcheck/tests/x86-linux/scalar (stderr) helgrind/tests/tc06_two_races_xml (stderr) |
|
From: Tom H. <th...@cy...> - 2009-12-22 03:36:05
|
Nightly build on mg ( x86_64, Fedora 9 ) Started at 2009-12-22 03:10:06 GMT Ended at 2009-12-22 03:35:45 GMT Results differ from 24 hours ago Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 538 tests, 3 stderr failures, 0 stdout failures, 0 post failures == memcheck/tests/x86-linux/scalar (stderr) helgrind/tests/pth_spinlock (stderr) helgrind/tests/tc06_two_races_xml (stderr) ================================================= == Results from 24 hours ago == ================================================= Checking out valgrind source tree ... done Configuring valgrind ... done Building valgrind ... done Running regression tests ... failed Regression test results follow == 538 tests, 2 stderr failures, 0 stdout failures, 0 post failures == memcheck/tests/x86-linux/scalar (stderr) helgrind/tests/tc06_two_races_xml (stderr) ================================================= == Difference between 24 hours ago and now == ================================================= *** old.short Tue Dec 22 03:23:00 2009 --- new.short Tue Dec 22 03:35:45 2009 *************** *** 8,11 **** ! == 538 tests, 2 stderr failures, 0 stdout failures, 0 post failures == memcheck/tests/x86-linux/scalar (stderr) helgrind/tests/tc06_two_races_xml (stderr) --- 8,12 ---- ! == 538 tests, 3 stderr failures, 0 stdout failures, 0 post failures == memcheck/tests/x86-linux/scalar (stderr) + helgrind/tests/pth_spinlock (stderr) helgrind/tests/tc06_two_races_xml (stderr) |