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<body><span class="vcard"><a class="email" href="mailto:i@maskray.me" title="Fangrui Song <i@maskray.me>"> <span class="fn">Fangrui Song</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Missing dyn symbol for a weak wrapped function when using --wrap"
href="https://bugs.llvm.org/show_bug.cgi?id=49897">bug 49897</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>i@maskray.me
</td>
</tr>
<tr>
<td style="text-align:right;">Assignee</td>
<td>unassignedbugs@nondot.org
</td>
<td>i@maskray.me
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Missing dyn symbol for a weak wrapped function when using --wrap"
href="https://bugs.llvm.org/show_bug.cgi?id=49897#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Missing dyn symbol for a weak wrapped function when using --wrap"
href="https://bugs.llvm.org/show_bug.cgi?id=49897">bug 49897</a>
from <span class="vcard"><a class="email" href="mailto:i@maskray.me" title="Fangrui Song <i@maskray.me>"> <span class="fn">Fangrui Song</span></a>
</span></b>
<pre>I'll consider this a bug because ld.lld produced an R_X86_64_JUMP_SLOT
relocation referencing the index 0 undefined symbol, which would be errored by
glibc (see commit 7c74ce3c686938e95a08a05ea1e2a714eac43167).
Fixed by 7c74ce3c686938e95a08a05ea1e2a714eac43167: [ELF] --wrap: don't clear
sym->isUsedInRegularObj if real->isUsedInRegularObj; set wrap's initial binding
to sym's
I fixed another bug: if `__wrap_foo` does not exist, its initial binding should
be `foo`'s.
I can still observe a difference with GNU ld which probably does not matter in
practice: if foo does not exist, --wrap=foo is a no-op in ld.lld. However, GNU
ld can still redirect __real_foo to foo.</pre>
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