Unfortunally you have the last valgrind message below, just before the
crash.
If Valgrind cannot get more memory while the client is requesting some,
it will (silently) return NULL to the client.
If Valgrind cannot get more memory while it requests itself some memory
(e.g.
for the tool arena),
It is not clear to me why the mmap fails.
A guess : it might be because the /tmp file system does not allow shared
memory files
to be put on this fs ?
You could try to run with -d -d -d -v -v -v to have more details.
Otherwise, you can bypass this particular problem by disabling the
Valgrind
I still get errors from puts().
You could try --track-origins=yes to see where this uninit value comes
from.
(maybe it might be some optimisation of string handling in libc which
should be
ignored by the libc suppression file not exactly up to date for your
system ?)
This message and
If you modify the source i think you can
Look at VALGRIND_DO_LEAK_CHECK in link below
http://valgrind.org/docs/manual/mc-manual.html
http://valgrind.org/docs/manual/mc-manual.html
to be able to call incremental leak check
Incremental leak check (i.e. showing the new or changed leaks since
I have a big program for Valgrind to just do memory check, but right
now all I get from valgrind after one run is that
all the reference to my NEW object declaration, which is not what I
really want. Could some one please show me
way to config Valgrind so that it only show to those unused
Valgrind can run multi-threaded processes, but can only run one thread
at the same time.
So, when running a single process under Valgrind on a multi-cpu system,
you will not use more than 1 CPU
at the same time. This explains the 12.5% (1/8) that you have observed.
Note that this serialised
That is correct. Memcheck is not a garbage collection system
and does not count memory references dynamically. That would
slow down your program even more. There are many ways in
which references to memory can be lost, such as storing a
new value in a pointer variable, and without
I'm profiling a multi-component embedded system on Ubuntu.
The components are in multiple languages (c++, java,
javascript tied in using lein and cmake), thus I chose
Valgrind (also using perf and YourKit to qualify the valgrind
results). I am wondering, will Valgrind work properly if
I have successfully compiled and run Valgrind for the Android emulator
delivered with the Android SDK.
However, as this emulator emulates an ARMv5 and as Valgrind does not
support
ARMv5, I had to put some patches to make it compiling and running on
the Android SDK emulator.
If you can make
# . /valgrind --leak-check=yes testapp
.: Can't open /valgrind
# ./valgrind --leak-check=yes testapp
./valgrind: not found
# . valgrind --leak-check=yes testapp
/system/bin/valgrind: 1: Syntax error: word unexpected (expecting ))
# valgrind --leak-check=yes ./system/bin/testapp
valgrind: not found
According to the output below, your valgrind seems to be at least located in
/android/external/valgrind-3.7.0/coregrind
and so you might try:
/android/external/valgrind-3.7.0/coregrind/valgrind
But this looks like this Valgrind has not been installed and/or compiled
according to the official
But here's what it is:
android sdk is on my VM. the rootfs is on the board. there is no
/external/valgrind/coregrind/valgrind on the board, it's just
/system/bin/valgrind. Every other app I put there becomes visible
instantly as i work with a live NFS. I really don't know why valgrind
is acting
Hi!
I just compiled a 64bit Valgrind 3.7 on OS X 10.7 hoping to use it for
a new project.
Wanting to try it out, I ran it on a project I just started that just
allocated and de-allocated a matrix (correctly) and it said that there
are weird leaks somewhere in the ImageLoader namespace/class
I think it is not possible (or at least without significant work) to
overcome the 32Gb limit.
An alternative solution might be:
if you have a mixture of big allocations and small allocations in
your application,
and your double free is of a small size,
then you could take a 3.7.0 from SVN
[mailto:meir.yeshu...@intel.com]
Sent: Friday 14 October 2011 16:18
To: WAROQUIERS Philippe; valgrind-users@lists.sourceforge.net
Subject: RE: [Valgrind-users] --free-list-vol limit
Thanks. Sounds like a nice way to allow a bigger free list
volume and it would have helped in my
In fact, it is trivial to go over 32GB (including for the freelist
volume).
Here are the changes:
In memcheck/mc_main.c, insert '10*' to obtain:
else if VG_BINT_CLO(arg, --freelist-vol, MC_(clo_freelist_vol),
0,
10*10*1000*1000*1000LL) {}
in
...
2243 GST_OBJECT_UNLOCK (pad);
2244 result = GST_PAD_GETCAPSFUNC (pad) (pad);
2245 GST_OBJECT_LOCK (pad);
The first two snippets use the same lock order and the third snipped
temporarily releases a lock.
As line 2243 unlocks pad, there must be another place where pad is
locked.
This
With valgrind, the memory footprint is increased, and the allocation
does eventually fail. The footprint increase is caused, as I
understand it, by valgrind keeping alive blocks that would normally be
freed during realloc, so that it can check for accesses to those
blocks. In any case, the only
However, the cost seems to include overhead from valgrind itself, such
as malloc other hooks.
(I see in the call graph that malloc calls malloc_hook_ini
once with a
cost of around 60,000 Ir.
Having only one a few mallocs in a particluar algorithm this overhead
greatly distorts test results.
Thanks for the answer. In the meantime I have found a partial solution
to this problem. I set
ulimit -c ulimited
run my program under helgrind and then kill it with SIGABRT when it
hangs. Using gdb I can then get the stack trace from the vgcore.
file generated.
Still it would be a nice feature
If you want to have a snapshot at a specific point in your
application, you can do that with the last (not yet released) SVN
version.
If your application is waiting before exiting (e.g. waiting to click on
a
quit button), then you can use vgdb snapshot (or vgdb
detailed_snapshot)
from a shell
Helgrind: hg_main.c:2298 (evh__HG_PTHREAD_COND_WAIT_POST): Assertion
'cvi-nWaiters 0' failed.
It looks like a bug in valgrind/helgrind.
As Julian has improved a lot helgrind in 3.7.0, an easy thing to try is
to get the last version from svn, recompile and see if it works better.
See
As part of Valgrind 3.7.0 SVN (not yet released so), a gdbserver has
been integrated
in Valgrind.
With this gdbserver, the process running under Valgrind can be fully
debugged
(e.g. it is possible to use break/next/info thread/).
This functionality has been tested on multiple platforms
Those are parts of the address space (of both Valgrind and
your program)
You can refer to coregrind/m_aspacemgr/aspacemgr-linux.c for details.
Now what could cause such an error? My program can create/destroy
threads very quickly. I assume there's something strange with the
stack?
Any hints
I will work on that this evening, and if confirmed, will prepare
a patch and file a bug in bugzilla.
https://bugs.kde.org/show_bug.cgi?id=276993
filed in bugzilla (with patch containing a test case and a fix for 3.7.0
SVN)
Philippe
This message and any files transmitted with it are
Checked with 3.7.0 SVN and the problem is still there.
But I think I know what it is (wrong check of segment state
in the implementation of the mremap).
I will work on that this evening, and if confirmed, will prepare
a patch and file a bug in bugzilla.
Philippe
This message and any
Perhaps the best that you can do is modify the custom allocator
using something like:
-
#include valgrind.h
if (RUNNING_ON_VALGRIND)
*p = 0;
else if (*p)
*p = 0;
I wonder if the above if-s are really needed.
I think that on many modern cpu (with
However, the question is globally: if the lower-level allocator (lower
than this one) returns mmap(,,,MAP_ANONYMOUS,,) then the unconditional
store of 0 causes an immediate dirtying of a page (all MAP_ANONYMOUS
pages initially refer to the _same_ single, zeroed physical page)
with the associated
I tried a similar test case like yours and it works ok.
Unfortunately my
program is extremely large and complicated. In fact I get
other errors
like conditional jump depends on uninitialized value but
these errors
exist in another part of the code entirely.
If the other errors
Why there is a Segmentation fault ? And why it doesn't display
Segmentation fault when I run dmesg ?
IIUC, Valgrind is using the SIGSEGV signal to e.g. track the need to
increase the stack.
As it properly traps and handles SIGSEGV, you see no crash (and so, no
indication of an error anywhere).
(David: memcpy does not do an overlap check, but Valgrind is there to do
these missing checks :).
I confirm that the memcpy overlap error is not reported anymore by
Valgrind :
I have tried at work with a 3.7.0 SVN, and it looks like the memcpy
overlap check is broken.
Investigating a little bit,
I digged a little bit at your problem (using a valgrind patched with
gdbserver):
I put a break at line 83, then searched the leaks and examined the value
of m14.
Then did next, and again searched leaks and examined value of m14.
And then the same for the next line.
You will see then that the
If nothing else, then when the first huge block is detected
give a warning:
huge block detected (%lu bytes); consider adjusting --freelist-vol
Note that in this case, the problem is not the free list.
The default value of the free list is quite small (20Mb).
See my other mail(s) for a
Recorded for tracking purposes at:
https://bugs.kde.org/show_bug.cgi?id=269884
I believe this one should be marked as a duplicate of
https://bugs.kde.org/show_bug.cgi?id=250101
(which also contains a patch fixing the problem).
Philippe
This message and any files transmitted with it are
1. integrate the patch https://bugs.kde.org/show_bug.cgi?id=250101
I have voted +10 for this patch. [Why did it not appear in 3.6.x?]
It was a candidate for 3.6.0, but I understand there was too much work,
and too little effort available.
For 3.6.1, this patch was not taken, as this is not
Try to do a web search using your favourite search engine on the words
valgrind user mode linux.
Apart of this, I have some doubts you can tell GRUB to start Valgrind on
the kernel :).
Philippe
From: Skindell, David [mailto:david.pat.skind...@hp.com]
With my rather poor knowledge of all this, I think that detecting
function calls and return is a tricky problem
(when it has to be handled properly in all cases).
To my knowledge, callgrind has done this work of detecting function
calls.
So, you might see how to modify callgrind to fullfil your
On Centos, apart of the 'signal was supposed to be fatal', do you see
any other error message reported before by Valgrind ?
For what concerns the 'signal was supposed to be fatal', here are a few
questions/things to look at:
1. when you had this message, was the --vgdb=yes argument given to
Who is sending this SIGALRM to the process ?
If this is another process (e.g. a supervision process),
then as your process starts under valgrind a lot
slower, the timer used by the supervision process might need to be
made bigger.
Philippe
-Original Message-
From: ppmoore
Currently, such usage is not supported.
But you might try to use the gdbserver patch . See
http://bugs.kde.org/show_bug.cgi?id=214909
This patch gives a fully debuggable process under valgrind (so,
continue, next, step, break, info threads, ... commands are supported).
The patch is not (yet)
8
#define RZ_SZB (128)
char *sp = /* stack pointer value */;
char vbits[RZ_SZB] = {0};
VALGRIND_GET_VBITS(sp-RZ_SZB, vbits, RZ_SZB);
VALGRIND_MAKE_MEM_DEFINED(sp-RZ_SZB, RZ_SZB);
/* ... scan the red zone here ... */
VALGRIND_SET_VBITS(sp-RZ_SZB, vbits, RZ_SZB);
8
I can
But similarly to the previous comment of Tom, your application
code you would integrate and link in valgrind tool code
will need to ensure all writes are properly recorded.
So, it looks the same kind of work to do it in your own
code, or do it inside valgrind.
So, if your often called function
int main(void)
{
char buf[1000] = malloc(1000;
buf[0] = 0;
return 0;
}
The above program is slightly strange (does not compile here).
But a slightly updated version does also not report a leak.
This is explained by the fact that valgrind does the equivalent of
an optimistic garbage
Does anybody have suggestion how to fix the problem in user space?
I can easily imagine scenario where I would need to use
valgrind with debugger
on a machine, where I have no root access.
You might try the gdbserver patch
(http://bugs.kde.org/show_bug.cgi?id=214909)
With this patch, if you
3) Similar to 2) I wonder why it's not possible to create
suppressions or
attach a debugger in xml mode. Basically this would also mean:
valgrind asks some server via socket whether to attach
debugger or create
suppression at given position. Is it simply not implemented or
was there a
reason
Have you tried running your app under Massif? That has helped me
recently to track down a memory leak which was not visible in
Valgrind/Memcheck but became clearly visible in Valgrind/Massif (the
leak was caused by repeated setenv() calls, which apparently don't free
any memory even if the env
of the leak is using valgrind, but valgrind only sees 24MB
of possibly lost memory.
For what concerns the possibly lost, a bug has been recently
fixed in 3.6.0 SVN. Before this fix, memcheck was giving a lot of
false possibly lost.
See http://bugs.kde.org/show_bug.cgi?id=206600
leaking), how
At work, we encountered 'not enough memory' crashes of our big
application
under valgrind due to the way the superblocks are managed (see bug
http://bugs.kde.org/show_bug.cgi?id=250101
(there is a proposed patch to solve this bug)
However, in your case, not being able to even allocate about 20
mmap(0x402001000, 4194304, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, 0, 0) = -1 EPERM
(Operation not permitted)
getpid()= 27233
This is probably due to grsecurity kernel but I am not sure
why, it has worked
before on a 32 bit system.
You can give one or more -v arguments and/or one or mode -d arguments.
This will produce more verbose valgrind output and/or produce debug
output.
There are also other debug switches, which you can find by :
valgrind --help-debug
Philippe
From:
In the valgrind directory, do
make regtest
You can also do
make perf
see README_DEVELOPPERS in valgrind directory for more info.
-Original Message-
From: Alessandro Biasci [mailto:a.bia...@evidence.eu.com]
Sent: Wednesday 11 August 2010 09:50
To:
From: Alessandro Biasci [mailto:a.bia...@evidence.eu.com]
...
It is possible to compile only the C test and not C++?
Not that I know of.
But you can try to cheat by either redefining a gcc hiding the
standard gcc, and that would create a dummy .o when it compiles
a .cpp extension or replace all
This is the report:
== 511 tests, 474 stderr failures, 1 stdout failure, 0 post failures ==
The test fails for stderr but if I execute a test (es: memcheck/tests$
./addressable) it pass.
To run one test, you must do something like:
perl tests/vg_regtest memcheck/tests/addressable
(the
I am working on a patch that makes a valgrind process fully debuggable
(so, you can put breaks, look variables or registers, continue, next,
step, query leaks interactively, etc ...).
So, to obtain the below, you could just start your executable
under the patched valgrind, put breaks at the
itself.
How does one debug that? gdb - valgrind - app?
That segfaults even earlier and gives a totally useless
backtrace without any
debug info...
Hints?
From my recent experience debugging valgrind (I am busy working
on having gdb able to properly debug a process which is running under
Do anyone have a script which reports only new leaks/allocations since
last VALGRIND_DO_LEAK_CHECK?
It's probably easy to write, once one knows all the variants of the
128 bytes in 1 blocks are still reachable in loss record 16 of 19
lines and which variants can move between loss
I need it off, and in fact I turn even more off, see
https://bugs.kde.org/show_bug.cgi?id=201170
I build with that patch and use --show-possible=no to avoid
generating gigabytes of warnings of questionable utility.
So, the short answer is: big apps that are trying to
stamp out all their memory
-Original Message-
From: Nicholas Nethercote [mailto:n.netherc...@gmail.com]
Sent: Friday 11 September 2009 00:17
To: Cristian Todor
Cc: valgrind-users@lists.sourceforge.net
Subject: Re: [Valgrind-users] Fw: Massif for LWP
On Thu, Sep 10, 2009 at 11:34 PM, Cristian Todor
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