<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/94207>94207</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            【Tsan】【Bug】Calling siglongjmp in signal handler will cause the ignore_reads_and_writes check to fail
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          yinchuang-code
      </td>
    </tr>
</table>

<pre>
    Tsan disable ignores in CallUserSignalHandler when  ignores are enabled before call signal handler,but it will make "CHECK_GT(thr->ignore_reads_and_writes, 0);" failed in ThreadIgnoreEnd if someone use siglongjmp in signal handler:


dlopen
- ThreadIgnoreBegin
  - thr->ignore_reads_and_writes++
- trigger signal
  - CallUserSignalHandler 
   - thr->ignore_reads_and_writes = 0
   - Call siglonghmp to jump to a normal position
- ThreadIgnoreEnd
    - CHECK_GT(thr->ignore_reads_and_writes, 0); // failed!
     
</pre>
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