https://bugs.kde.org/show_bug.cgi?id=485487
Bug ID: 485487
Summary: glibc built with -march=x86-64-v3 does not work due to
ld.so strcmp
Classification: Developer tools
Product: valgrind
Version: 3.23 GIT
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: memcheck
Assignee: jsew...@acm.org
Reporter: fwei...@redhat.com
Target Milestone: ---
Created attachment 168460
--> https://bugs.kde.org/attachment.cgi?id=168460&action=edit
valgrind-amd64-redir-strcmp.patch
This was originally observed as a glibc test case failure:
[PATCH] x86_64: Suppress false positive valgrind error
<https://inbox.sourceware.org/libc-alpha/20240226000326.3844791-1-hjl.to...@gmail.com/>
However, the analysis was incorrect, and the test failure actually shows that
the newly built glibc is incompatible with valgrind. I think it's necessary to
add a redirector for strcmp.
We see this in Fedora with valgrind-3.22.0-7.fc40.x86_64, which already has one
AVX2 inline strcmp fix applied.
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