On 11/9/21 14:16, Kyryl Melekhin wrote:
Hello,
I am almost certain to have found a bug in valgrind.
The false positive error appears only when compiled with
tcc compiler. The platform is x86_64 linux, musl.
I can reproduce it in my regex engine and I have created
the following branch for you to check it out:
https://github.com/kyx0r/pikevm/tree/valgrind_bug
> [[snip]]
If the problem is compiler-dependent, and if pikevm is as small as advertised,
then the best thing for *you* to do is to produce two complete runnable
executable programs, which are "the same" except that one has the suspected
bug (thus is compiled with tcc for x86_64, and linked with musl to run
under Linux), and the other does not (the same source compiled with some other
compiler [specify and include its version], and linked with musl to run under
Linux.)
Provide a URL to each executable file. Almost nobody will go to the trouble
of re-creating your unspecified software build environment (which version of
tcc and where to get it, which version of musl and where to get it, etc.)
just to investigate the alleged bug.
Your recipe [snipped above] does not matter. If *you* cannot be bothered to
execute the recipe and provide URL to the results, then it is extremely
likely that no one else will bother, either. Various hosting services
provide no-cost or low-cost download service, and even GitHub allows attachments
and other ways to provide access to non-humongous executable files. Use one.
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