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From: Konstantin S. <kon...@gm...> - 2007-12-17 21:19:50
|
I have the same issue with our own message queues.
Helgrind does not support them out of the box but can be easily enhanced.
I did it with the help of source code changes:
void Put(T elem) { // put() method of your queue
sem_t *uniq_sem = new sem_t;
sem_init(uniq_sem);
sem_post(uniq_sem);
// now do the actual 'put' stuff, putting uniq_sem together with elem
}
T Get() { // get() method of your queue
// do the actual 'get' stuff; get uniq_sem from queue together with elem
sem_wait(uniq_sem);
sem_destroy(uniq_sem);
delete uniq_sem;
return elem;
}
The good thing is that you don't really need to create a real semaphore --
just create a integer with unique value (I use atomic_increment of static
var) and pass it to appropriate helgrind's user requests (see helgrind.h and
hg_intercepts.c).
The bad thing is that it might be challenging to achieve the same effect
without source code changes.
It is not enough to intercept the call to Put/Get routines -- you need to
put something into the queue (at least, I did not find another way).
--kcc
On Dec 17, 2007 10:23 PM, Sahni, Jitan <jit...@cr...>
wrote:
>
> does helgrind work properly on ACE Tasks and Message Queues ? I am
> getting some helgrind race alerts when using ACE Tasks and Message Queues.
> Basically the parent and child thread are created at start of the program
> and then parent passes buffer of data to child thru ACE Message Queue . the
> waiting child picks the data , uses it and frees it . helgrind is alerting
> me on race condition on this model . Does helgrind work correctly on this
> model of multi threads ( tasks and Queues ) ?
>
> Also is there any way to print memory contents of the location printed in
> a race condition ?
>
>
>
> ==============================================================================
> Please access the attached hyperlink for an important electronic communications disclaimer:
> http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html
> ==============================================================================
>
>
> -------------------------------------------------------------------------
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>
>
|
|
From: John R.
|
Bart Van Assche wrote: >>The attached patch to valgrind-3.3.0 is what I am using to run >>UML (UserModeLinux) for x86 under memcheck on x86, thus checking >>the memory accesses of a linux kernel. > This sounds great. Can you share your experience with running UML under > memcheck ? Details will appear in use...@li... and have started to appear in lin...@vg... . In general, running UML under memcheck is much the same as running any large application under memcheck for the first time. "Bugs" crawl out of the woodwork left and right. The kernel allocators make some assumptions that are unfriendly to memcheck. Threads are a serious nuisance. Debugging is tedious. printf and "for(;;);" are your friends (to avoid timing-dependent problems, and so you can attach gdb to a specific address space.) Getting a traceback of UML under memcheck is cumbersome. The best progress often is made by writing a program to detect and isolate the bug (editing the source of the kernel and/or memcheck, recompiling, and re-running) rather than by general external application of gdb. The *option* for memcheck to complain as soon as possible, immediately upon fetch of uninit bits, without waiting for array indexing or a conditional jump/move, is sorely missed. -- John Reiser, jreiser@BitWagon.com |
|
From: Bart V. A. <bar...@gm...> - 2007-12-17 15:11:39
|
On 12/15/07, John Reiser <jr...@bi...> wrote: > > The attached patch to valgrind-3.3.0 is what I am using to run > UML (UserModeLinux) for x86 under memcheck on x86, thus checking > the memory accesses of a linux kernel. This sounds great. Can you share your experience with running UML under memcheck ? Regards, Bart. |
|
From: Tom H. <th...@cy...> - 2007-12-17 03:59:46
|
Nightly build on alvis ( i686, Red Hat 7.3 ) started at 2007-12-17 03:15:03 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 == 321 tests, 62 stderr failures, 1 stdout failure, 28 post failures == memcheck/tests/addressable (stderr) memcheck/tests/badjump (stderr) memcheck/tests/describe-block (stderr) memcheck/tests/erringfds (stderr) memcheck/tests/leak-0 (stderr) memcheck/tests/leak-cycle (stderr) memcheck/tests/leak-pool-0 (stderr) memcheck/tests/leak-pool-1 (stderr) memcheck/tests/leak-pool-2 (stderr) memcheck/tests/leak-pool-3 (stderr) memcheck/tests/leak-pool-4 (stderr) memcheck/tests/leak-pool-5 (stderr) memcheck/tests/leak-regroot (stderr) memcheck/tests/leak-tree (stderr) memcheck/tests/long_namespace_xml (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/match-overrun (stderr) memcheck/tests/noisy_child (stderr) memcheck/tests/partial_load_dflt (stderr) memcheck/tests/partial_load_ok (stderr) memcheck/tests/partiallydefinedeq (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/sigkill (stderr) memcheck/tests/stack_changes (stderr) memcheck/tests/x86/bug152022 (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) memcheck/tests/x86/xor-undef-x86 (stderr) memcheck/tests/xml1 (stderr) massif/tests/alloc-fns-A (post) massif/tests/alloc-fns-B (post) massif/tests/basic (post) massif/tests/basic2 (post) massif/tests/big-alloc (post) massif/tests/culling1 (stderr) massif/tests/culling2 (stderr) massif/tests/custom_alloc (post) massif/tests/deep-A (post) massif/tests/deep-B (stderr) massif/tests/deep-B (post) massif/tests/deep-C (stderr) massif/tests/deep-C (post) massif/tests/deep-D (post) massif/tests/ignoring (post) massif/tests/insig (post) massif/tests/long-time (post) massif/tests/new-cpp (post) massif/tests/null (post) massif/tests/one (post) massif/tests/overloaded-new (post) massif/tests/peak (post) massif/tests/peak2 (stderr) massif/tests/peak2 (post) massif/tests/realloc (stderr) massif/tests/realloc (post) massif/tests/thresholds_0_0 (post) massif/tests/thresholds_0_10 (post) massif/tests/thresholds_10_0 (post) massif/tests/thresholds_10_10 (post) massif/tests/thresholds_5_0 (post) massif/tests/thresholds_5_10 (post) massif/tests/zero1 (post) massif/tests/zero2 (post) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/hg01_all_ok (stderr) helgrind/tests/hg02_deadlock (stderr) helgrind/tests/hg03_inherit (stderr) helgrind/tests/hg04_race (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/hg06_readshared (stderr) helgrind/tests/tc01_simple_race (stderr) helgrind/tests/tc02_simple_tls (stderr) helgrind/tests/tc03_re_excl (stderr) helgrind/tests/tc05_simple_race (stderr) helgrind/tests/tc06_two_races (stderr) helgrind/tests/tc07_hbl1 (stderr) helgrind/tests/tc08_hbl2 (stderr) helgrind/tests/tc09_bad_unlock (stderr) helgrind/tests/tc11_XCHG (stderr) helgrind/tests/tc12_rwl_trivial (stderr) helgrind/tests/tc14_laog_dinphils (stderr) helgrind/tests/tc16_byterace (stderr) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc19_shadowmem (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) helgrind/tests/tc23_bogus_condwait (stderr) helgrind/tests/tc24_nonzero_sem (stderr) |
|
From: Tom H. <th...@cy...> - 2007-12-17 03:36:40
|
Nightly build on lloyd ( x86_64, Fedora 7 ) started at 2007-12-17 03:05:08 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 == 355 tests, 7 stderr failures, 2 stdout failures, 0 post failures == memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) |
|
From: Tom H. <th...@cy...> - 2007-12-17 03:27:37
|
Nightly build on dellow ( x86_64, Fedora 8 ) started at 2007-12-17 03:10:05 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 == 355 tests, 9 stderr failures, 4 stdout failures, 0 post failures == memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) none/tests/pth_cvsimple (stdout) none/tests/pth_detached (stdout) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (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 == 355 tests, 8 stderr failures, 2 stdout failures, 0 post failures == memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/vcpu_fnfns (stdout) memcheck/tests/x86/scalar (stderr) memcheck/tests/xml1 (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) ================================================= == Difference between 24 hours ago and now == ================================================= *** old.short Mon Dec 17 03:19:24 2007 --- new.short Mon Dec 17 03:27:40 2007 *************** *** 8,10 **** ! == 355 tests, 8 stderr failures, 2 stdout failures, 0 post failures == memcheck/tests/malloc_free_fill (stderr) --- 8,10 ---- ! == 355 tests, 9 stderr failures, 4 stdout failures, 0 post failures == memcheck/tests/malloc_free_fill (stderr) *************** *** 16,17 **** --- 16,20 ---- none/tests/mremap2 (stdout) + none/tests/pth_cvsimple (stdout) + none/tests/pth_detached (stdout) + helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc18_semabuse (stderr) |
|
From: Tom H. <th...@cy...> - 2007-12-17 03:14:25
|
Nightly build on gill ( x86_64, Fedora Core 2 ) started at 2007-12-17 03:00:02 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 == 357 tests, 24 stderr failures, 1 stdout failure, 0 post failures == memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) none/tests/fdleak_fcntl (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/hg01_all_ok (stderr) helgrind/tests/hg02_deadlock (stderr) helgrind/tests/hg03_inherit (stderr) helgrind/tests/hg04_race (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/tc01_simple_race (stderr) helgrind/tests/tc05_simple_race (stderr) helgrind/tests/tc06_two_races (stderr) helgrind/tests/tc09_bad_unlock (stderr) helgrind/tests/tc14_laog_dinphils (stderr) helgrind/tests/tc16_byterace (stderr) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc19_shadowmem (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) helgrind/tests/tc23_bogus_condwait (stderr) |
|
From: <js...@ac...> - 2007-12-17 01:22:03
|
Nightly build on g5 ( SuSE 10.1, ppc970 ) started at 2007-12-17 02:00:01 CET 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 == 288 tests, 27 stderr failures, 2 stdout failures, 0 post failures == memcheck/tests/deep_templates (stdout) memcheck/tests/leak-cycle (stderr) memcheck/tests/leak-tree (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/pointer-trace (stderr) none/tests/faultstatus (stderr) none/tests/fdleak_cmsg (stderr) none/tests/mremap (stderr) none/tests/mremap2 (stdout) helgrind/tests/hg02_deadlock (stderr) helgrind/tests/hg03_inherit (stderr) helgrind/tests/hg04_race (stderr) helgrind/tests/hg05_race2 (stderr) helgrind/tests/tc01_simple_race (stderr) helgrind/tests/tc05_simple_race (stderr) helgrind/tests/tc06_two_races (stderr) helgrind/tests/tc07_hbl1 (stderr) helgrind/tests/tc08_hbl2 (stderr) helgrind/tests/tc09_bad_unlock (stderr) helgrind/tests/tc11_XCHG (stderr) helgrind/tests/tc14_laog_dinphils (stderr) helgrind/tests/tc16_byterace (stderr) helgrind/tests/tc17_sembar (stderr) helgrind/tests/tc19_shadowmem (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc21_pthonce (stderr) helgrind/tests/tc22_exit_w_lock (stderr) helgrind/tests/tc23_bogus_condwait (stderr) helgrind/tests/tc24_nonzero_sem (stderr) |