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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Deadlock in wasm-ld when linking large archive with object"
href="https://bugs.llvm.org/show_bug.cgi?id=37064">37064</a>
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<th>Summary</th>
<td>Deadlock in wasm-ld when linking large archive with object
</td>
</tr>
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<th>Product</th>
<td>lld
</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>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>tyler@fastly.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20174" name="attach_20174" title="tar file of musl.a and stdio_test.o">attachment 20174</a> <a href="attachment.cgi?id=20174&action=edit" title="tar file of musl.a and stdio_test.o">[details]</a></span>
tar file of musl.a and stdio_test.o
wasm-ld occasionally hits what I assume is a deadlocking race condition when
linking a large wasm archive file with a small wasm object file. It sees to
occur more frequently on slower machines. The issue vanishes when wasm-ld is
run with "--no-threads".
I am using llvm 6.0.0 and invoking wasm-ld like so:
wasm-ld --no-entry --allow-undefined stdio_test.o musl.a -o stdio_test.wasm
Backtraces of all running threads can be found here, however I don't have a
debug build of LLVM handy so it's of limited use:
<a href="https://gist.github.com/tyler/94beafc2929b14196fa92c4d334432c2">https://gist.github.com/tyler/94beafc2929b14196fa92c4d334432c2</a>
stdio_test.o and musl.a are attached.</pre>
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