Upon tracing valgrind upon suggestions above I found two offending system
calls in my code: sys_newstat and sys_statfs. I also verified deadlock
lines by running valgrind with "vgdb" set and stepping through the code.
Following patch is the changed I did in valgrind to get these system calls
supported. Let me know if there is interest in applying the patch in trunk,
and if so I should submit this patch elsewhere.
--- coregrind/m_syswrap/syswrap-generic.c 2014-11-25
14:41:20.000000000 -0500
+++
/home/atalay/source/valgrind-3.10.1/coregrind/m_syswrap/syswrap-generic.c
2015-04-15 15:50:38.465388486 -0400
@@ -4101,6 +4101,8 @@
PRE_REG_READ2(long, "setreuid", vki_uid_t, ruid, vki_uid_t, euid);
}
+
+
PRE(sys_setrlimit)
{
UWord arg1 = ARG1;
@@ -4160,6 +4162,7 @@
PRE(sys_newstat)
{
+ *flags |= SfMayBlock;
PRINT("sys_newstat ( %#lx(%s), %#lx )", ARG1,(char*)ARG1,ARG2);
PRE_REG_READ2(long, "stat", char *, file_name, struct stat *, buf);
PRE_MEM_RASCIIZ( "stat(file_name)", ARG1 );
@@ -4173,6 +4176,7 @@
PRE(sys_statfs)
{
+ *flags |= SfMayBlock;
PRINT("sys_statfs ( %#lx(%s), %#lx )",ARG1,(char*)ARG1,ARG2);
PRE_REG_READ2(long, "statfs", const char *, path, struct statfs *, buf);
PRE_MEM_RASCIIZ( "statfs(path)", ARG1 );
Thanks the responses.
Atalay
On Thu, Apr 9, 2015 at 2:08 PM, Atalay Ozgovde <aozgo...@ralota.com> wrote:
> This is essentially the same bug as:
> https://bugs.kde.org/show_bug.cgi?id=278057
> A patch was applied for this bug in version 3.7 and it is considered
> fixed.
> I am using version 3.10, I confirmed in the source code that the patch is
> applied. Valgrind still dread-locks when used to test an application that
> uses fuse in our environment. We are using 64bit Ubuntu 12.04LTS.
> Anybody knows if there is an easy fix?
>
> Thanks,
>
> Atalay
>
>
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