On 3/12/25 22:40, kiran hardas wrote:
Hi Philippe/Team,
Thank you Philippe for your suggestions, I was able to resolve the
earlier errors by adding additional valgrind options and loading the
symbol table.
In my application, few variables and a function pointer was
uninitialised which led to previous errors mentioned in earlier email.
Proceeding further with my earlier activity, right now i am
seeing error related to unhandled syscall no. 395 in valgrind logs. I
thought to bring this up in this mail chain for your suggestions/inputs.
# ./usr/test/bin/valgrind --version -v
valgrind-3.24.0-fcdaa47426-20241101
GNU/Linux 5.4
Glibc 2.40
gcc 14.2
binutils 2.43
Error snippet:
--6423-- WARNING: unhandled x86-linux syscall: 395
==6423== at 0x1F757398: shmget (in /lib/libc-2.40.so
<http://libc-2.40.so>)
by 0xF597083: <application backtraces>
...
...
--6423-- You may be able to write your own handler.
--6423-- Read the file README_MISSING_SYSCALL_OR_IOCTL.
--6423-- Nevertheless we consider this a bug. Please report
--6423-- it at http://valgrind.org/support/bug_reports.html.
From my analysis of valgrind code, i can see the shmget wrappers are
present in coregrind/m_syswrap area, but still it is throwing such error.
Any pointers or suggestions would be appreciated, Thanks.
Hi
That looks like shmget on x86. Can you confirm that?
If so could you build valgrind with this patch
diff --git a/coregrind/m_syswrap/syswrap-x86-linux.c
b/coregrind/m_syswrap/syswrap-x86-l
inux.c
index 50384817d..5c0b57789 100644
--- a/coregrind/m_syswrap/syswrap-x86-linux.c
+++ b/coregrind/m_syswrap/syswrap-x86-linux.c
@@ -1621,6 +1621,8 @@static SyscallTableEntry syscall_table[] = {
GENX_(__NR_rseq, sys_ni_syscall), // 386
+ LINX_(__NR_shmget, sys_shmget), // 395
+
LINXY(__NR_clock_gettime64, sys_clock_gettime64), // 403
LINX_(__NR_clock_settime64, sys_clock_settime64), // 404
and let us know if it works?
It's likely that you will also need shmat shmctl and shmdt as well.
A+
Paul
_______________________________________________
Valgrind-users mailing list
Valgrind-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/valgrind-users
