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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [llvm-symbolizer] new pm regression, symbolization fails to recover line number with -ffunction-sections -gdwarf-aranges"
href="https://bugs.llvm.org/show_bug.cgi?id=52187">52187</a>
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<th>Summary</th>
<td>[llvm-symbolizer] new pm regression, symbolization fails to recover line number with -ffunction-sections -gdwarf-aranges
</td>
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<th>Product</th>
<td>clang
</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>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Tooling
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>pierregousseau14@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=25367" name="attach_25367" title="use-after-scope-capture.cpp">attachment 25367</a> <a href="attachment.cgi?id=25367&action=edit" title="use-after-scope-capture.cpp">[details]</a></span>
use-after-scope-capture.cpp
Asan's test case use-after-scope-capture.cpp fails if -ffunction-sections
-gdwarf-aranges and new pm is enabled.
The test is failing as the stack trace does not contain line number anymore.
<span class="quote">>---------</span >
#include <functional>
int main() {
std::function<int()> f;
{
int x = 0;
f = [&x]() __attribute__((noinline)) {
return x; // BOOM
// CHECK: ERROR: AddressSanitizer: stack-use-after-scope
// CHECK: #0 0x{{.*}} in {{.*}}use-after-scope-capture.cpp:[[@LINE-2]]
};
}
return f(); // BOOM
}
-----------<
llvm-symbolizer-output:
<span class="quote">>--------------------</span >
$ clang++ -ffunction-sections -gdwarf-aranges -gline-tables-only -O1
use-after-scope-capture.cpp && llvm-nm a.out --print-size -C | grep operator |
cut -d" " -f1 | sed 's/^/0x/' | xargs llvm-symbolizer -e a.out
main::$_0::operator()() const
use-after-scope-capture.cpp:0:0
-------------------<</pre>
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