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From: John R.
|
The web page http://bitwagon.com/valgrind+uml/index.html now exists with news, history, commentary, scripts, links on getting User Mode Linux for i686 to run under memcheck on i686. A standalone patch http://bitwagon.com/valgrind+uml/mc_main-asap.patch to valgrind-3.3.0 implements "--complain-asap=yes" independently of the other changes. See http://bitwagon.com/glibc-audit/glibc-audit.html about getting a "quiet" glibc. -- John Reiser, jreiser@BitWagon.com |
|
From: Bart V. A. <bar...@gm...> - 2008-01-01 19:31:16
|
On Dec 23, 2007 11:27 PM, Julian Seward <js...@ac...> wrote: > > > #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 > > The stack unwinder is being started with ip, sp, fp, lr values > for the thread concerned of zero, which leads to the segfault. > Are you sure the thread for which you are getting a stack trace > has good values for those registers? The attached exp-drd patch fixes the aforementioned crash. Julian, can you please apply it ? Thanks, Bart. |
|
From: Bart V. A. <bar...@gm...> - 2008-01-01 18:48:35
|
On Jan 1, 2008 7:11 PM, Julian Seward <js...@ac...> wrote: > > A more serious module-related question for drd is that it should not > include pub_core_*.h. Tools may only include pub_tool_*.h, in order > to control the complexity of the core/tool interface. For one thing > that will require adding the drd suppression file to DEFAULT_SUPP > in configure.in - not a problem. Can you list precisely the stuff from > the core_*.h includes that you need, that is not present in the > tool_*.h files? > Next to dynamically loading the exp-drd suppression file, the only aspect of the core interface being used in exp-drd is VG_(clo_backtrace_size). I can replace this variable with a constant however. Bart. |
|
From: Julian S. <js...@ac...> - 2008-01-01 18:13:16
|
On Tuesday 01 January 2008 18:11, Bart Van Assche wrote: > On Dec 30, 2007 1:30 PM, Tom Hughes <to...@co...> wrote: > > On 27/12/2007, Bart Van Assche <bar...@gm...> wrote: > > > The include file <pub_tool_libcproc.h> contains declarations for > > > various libc-functions. Two of these functions (VG_(getrlimit)() and > > > VG_(setrlimit)()) accept a pointer to a vki_rlimit structure. Inclusion > > > of pub_tool_vki.h is now required even when neither VG_(getrlimit)() or > > > VG_(setrlimit)() is called -- this is inconvenient. The attached patch > > > solves this. Can this patch please be committed on the trunk ? > > > > I'm not sure about this one - it looks like it rather violates the > > module boundaries. What do you think Julian? There are various places where pub_tool_libc*.h requires pub_tool_vki.h included first. A minor inconvenience resulting from misusing struct vki_rlimit in the interface to m_libc* and as well as its original purpose of describing the hosts' syscall interface. I'd prefer to leave it as it is. A more serious module-related question for drd is that it should not include pub_core_*.h. Tools may only include pub_tool_*.h, in order to control the complexity of the core/tool interface. For one thing that will require adding the drd suppression file to DEFAULT_SUPP in configure.in - not a problem. Can you list precisely the stuff from the core_*.h includes that you need, that is not present in the tool_*.h files? J |
|
From: Julian S. <js...@ac...> - 2008-01-01 17:54:12
|
> The cause of this crash is that in revision 7291 the behavior of > VG_(record_ExeContext)() has been changed: in revision 7290 and before > it was allowed to record the exe context from within > VG_TRACK(pre_thread_create)(), but from revision 7291 on this results > in a crash. As per http://www.mail-archive.com/valgrind-developers%40lists.sourceforge.net/msg01282.html and also http://www.mail-archive.com/valgrind-developers%40lists.sourceforge.net/msg01324.html the cause of the crash is that drd is calling VG_(record_ExeContext) for a thread which all the registers are zero, leading to the unwinder crashing. Not sure what 7291 has to do with it. 7291 simply created a copy of trunk 7290 post release. My guess is the important change is this, in 7300: --- trunk/coregrind/m_stacktrace.c 2007-12-12 11:42:33 UTC (rev 7299) +++ trunk/coregrind/m_stacktrace.c 2007-12-15 22:13:05 UTC (rev 7300) @@ -97,11 +97,9 @@ /* Assertion broken before main() is reached in pthreaded programs; the * offending stack traces only have one item. --njn, 2002-aug-16 */ /* vg_assert(fp_min <= fp_max);*/ - - if (fp_min + VG_(clo_max_stackframe) <= fp_max) { - /* If the stack is ridiculously big, don't poke around ... but - don't bomb out either. Needed to make John Regehr's - user-space threads package work. JRS 20021001 */ + if (fp_min + 512 >= fp_max) { + /* If the stack limits look bogus, don't poke around ... but + don't bomb out either. */ ips[0] = ip; return 1; } That change gets rid of an essentially bogus check and replaces it with something more reasonable. Unfortunately I think the bogus check caught the case where drd passes SP=0 (etc) and so had the unintended side effect of avoiding the segfault. Basically you can't call VG_(record_ExeContext) with a zero stack pointer as is happening now. So don't do the call -- wait till you have a valid SP and only then call it. In any case there is no loss since the previous arrangement would have gotten you only a 1-element stack trace with the top/only IP value being zero. J |
|
From: Bart V. A. <bar...@gm...> - 2008-01-01 17:11:23
|
On Dec 30, 2007 1:30 PM, Tom Hughes <to...@co...> wrote: > > On 27/12/2007, Bart Van Assche <bar...@gm...> wrote: > > > The include file <pub_tool_libcproc.h> contains declarations for various > > libc-functions. Two of these functions (VG_(getrlimit)() and > > VG_(setrlimit)()) accept a pointer to a vki_rlimit structure. Inclusion of > > pub_tool_vki.h is now required even when neither VG_(getrlimit)() or > > VG_(setrlimit)() is called -- this is inconvenient. The attached patch > > solves this. Can this patch please be committed on the trunk ? > > I'm not sure about this one - it looks like it rather violates the > module boundaries. What do you think Julian? I'm not sure I understand your comment -- can you please elaborate ? Bart. |
|
From: Bart V. A. <bar...@gm...> - 2008-01-01 17:10:29
|
On Dec 30, 2007 2:21 PM, Tom Hughes <to...@co...> wrote: > I was just looking at committing this, but I've run into a bit of a > problem, namely that drd segfaults on startup on my machine (with or > without this patch) so it's a bit hard for me to test it before I > commit it ;-) The cause of this crash is that in revision 7291 the behavior of VG_(record_ExeContext)() has been changed: in revision 7290 and before it was allowed to record the exe context from within VG_TRACK(pre_thread_create)(), but from revision 7291 on this results in a crash. I'm waiting for further input from Julian to resolve this issue. See also http://www.mail-archive.com/val...@li.../msg01278.html Bart. |
|
From: Tom H. <th...@cy...> - 2008-01-01 04:00:44
|
Nightly build on alvis ( i686, Red Hat 7.3 ) started at 2008-01-01 03:15:02 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 == 323 tests, 66 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/lsframe1 (stderr) memcheck/tests/lsframe2 (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/supp_unknown (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/blockfault (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/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...> - 2008-01-01 03:37:39
|
Nightly build on lloyd ( x86_64, Fedora 7 ) started at 2008-01-01 03:05:09 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, 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...> - 2008-01-01 03:28:03
|
Nightly build on dellow ( x86_64, Fedora 8 ) started at 2008-01-01 03:10:06 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, 8 stderr failures, 3 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_detached (stdout) helgrind/tests/tc18_semabuse (stderr) helgrind/tests/tc20_verifywrap (stderr) helgrind/tests/tc22_exit_w_lock (stderr) |
|
From: Tom H. <th...@cy...> - 2008-01-01 03:14:23
|
Nightly build on gill ( x86_64, Fedora Core 2 ) started at 2008-01-01 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 == 359 tests, 30 stderr failures, 1 stdout failure, 0 post failures == memcheck/tests/addressable (stderr) memcheck/tests/badjump (stderr) memcheck/tests/describe-block (stderr) memcheck/tests/malloc_free_fill (stderr) memcheck/tests/match-overrun (stderr) memcheck/tests/pointer-trace (stderr) memcheck/tests/stack_switch (stderr) memcheck/tests/supp_unknown (stderr) memcheck/tests/x86/scalar (stderr) memcheck/tests/x86/scalar_supp (stderr) none/tests/blockfault (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) |