<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/120915>120915</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            llvm-symbolizer can fail due to asan-compiled dependency libraries in LD_LIBRARY_PATH; SIGPIPE exit results
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          greghudson
      </td>
    </tr>
</table>

<pre>
    This issue only affects developers of libraries in the dependency chain of llvm-symbolizer, and it might be tough to fix.

I maintain MIT krb5.  Our `make check` runs various binaries with LD_LIBRARY_PATH set to a subdirectory of the build directory containing the built versions of libgssapi_krb5/libkrb5/etc..  If we have built everything with -fsanitizer=address and asan wants to report a problem with a stack trace when one of the binaries exits, llvm-symbolizer gets run to convert addresses into symbol names.  When llvm-symbolizer starts, the dynamic linker sees a bunch of asan-compiled krb5 libraries in LD_LIBRARY_PATH. Since llvm-symbolizer itself wasn't built with asan, one of these libraries will cause a dynamic linker error like:

    /usr/bin/llvm-symbolizer-18: symbol lookup error: /home/runner/work/krb5/krb5/src/./lib/libkrb5support.so.0: undefined symbol: __asan_option_detect_stack_use_after_return

The program then attempts to write to the llvm-symbolizer pipe and gets a SIGPIPE because the subprocess has exited.  If SIGPIPE isn't ignored, the process exits immediately without displaying the un-symbolized stack trace.

</pre>
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