<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/100791>100791</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `tools/llvm-exegesis/X86/latency` tests fail with glibc 2.40
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            tools:llvm-exegesis
      </td>
    </tr>

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

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

<pre>
    After upgrading the system to glibc 2.40, the following tests started failing:

```
Failed Tests (8):
  LLVM :: tools/llvm-exegesis/X86/latency/memory-annotations-livein.s
  LLVM :: tools/llvm-exegesis/X86/latency/memory-annotations.s
  LLVM :: tools/llvm-exegesis/X86/latency/subprocess-abnormal-exit-code.s
  LLVM :: tools/llvm-exegesis/X86/latency/subprocess-address-annotation.s
  LLVM :: tools/llvm-exegesis/X86/latency/subprocess-preserved-registers.s
  LLVM :: tools/llvm-exegesis/X86/latency/subprocess-rsp.s
  LLVM :: tools/llvm-exegesis/X86/latency/subprocess-segfault.s
  LLVM :: tools/llvm-exegesis/X86/latency/subprocess.s
```

FWICS, in all instances the failure has the same cause:

```
RUN: at line 3: /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm_build-abi_x86_64.amd64/bin/llvm-exegesis -mtriple=x86_64-unknown-unknown -mode=latency -snippets-file=/var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm/test/tools/llvm-exegesis/X86/latency/subprocess-preserved-registers.s -execution-mode=subprocess | /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm_build-abi_x86_64.amd64/bin/FileCheck /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm/test/tools/llvm-exegesis/X86/latency/subprocess-preserved-registers.s
+ /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm_build-abi_x86_64.amd64/bin/FileCheck /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm/test/tools/llvm-exegesis/X86/latency/subprocess-preserved-registers.s
+ /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm_build-abi_x86_64.amd64/bin/llvm-exegesis -mtriple=x86_64-unknown-unknown -mode=latency -snippets-file=/var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm/test/tools/llvm-exegesis/X86/latency/subprocess-preserved-registers.s -execution-mode=subprocess
llvm-exegesis error: Child benchmarking process exited with non-zero exit code: Disabling restartable sequences failed
FileCheck error: '<stdin>' is empty.
FileCheck command line: /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm_build-abi_x86_64.amd64/bin/FileCheck /var/tmp/portage/sys-devel/llvm-19.1.0_rc1/work/llvm/test/tools/llvm-exegesis/X86/latency/subprocess-preserved-registers.s
```
</pre>
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