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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Cannot attach to a process with exited leader thread (TID==PID)"
href="https://bugs.llvm.org/show_bug.cgi?id=47826">47826</a>
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<th>Summary</th>
<td>Cannot attach to a process with exited leader thread (TID==PID)
</td>
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<th>Product</th>
<td>lldb
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
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<th>Reporter</th>
<td>jan.kratochvil@redhat.com
</td>
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<th>CC</th>
<td>jdevlieghere@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>There does not need to exist a thread with TID equal to the process PID. That
TID could already exit while other TIDs of that PID may be still running.
<a href="https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=432b4d03ad0f23970315e9f9dec080ab4a9ab94b">https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=432b4d03ad0f23970315e9f9dec080ab4a9ab94b</a>
simplified and deGPLed as: <a href="https://people.redhat.com/jkratoch/leader-exit2.C">https://people.redhat.com/jkratoch/leader-exit2.C</a>
Currently LLDB server cannot attach to such TID as:
lldb-server g --attach >TID< :1234
ptrace(PTRACE_ATTACH, >PID<) = -1 EPERM (Operation not permitted)
write(2, "error: failed to attach to pid >TID<: Operation not permitted\n",
64) = 64
02295e6d1a1559f0689aeca09d98f468e3f29d9a = 2020-10-12</pre>
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