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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang produces debug info with wrong path with "-xassembler""
href="https://bugs.llvm.org/show_bug.cgi?id=41839">41839</a>
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<th>Summary</th>
<td>clang produces debug info with wrong path with "-xassembler"
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Driver
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>efriedma@quicinc.com
</td>
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<th>CC</th>
<td>aprantl@apple.com, dblaikie@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, paul_robinson@playstation.sony.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Steps to reproduce:
1. compile as assembler file to an object file, with the current directory
different from the directory containing the assembler file ("cd /; clang
-xassembler /some/path/foo.s -o /some/path/foo.o -c").
2. Run objdump -S; observe there is no interleaved assembly.
3. Repeat step 1, except use "-xassembler-with-cpp"
4. Run objdump -S; observe there is interleaved assembly.
5. Repeat step 1, except "cd" to the directory containing the assembler file
before invoking the compiler.
6. Run objdump -S; observe there is interleaved assembly.
I'm not sure I completely understand the issue; I'm not that familiar with
DWARF. But I think what's happening is that we're not encoding the necessary
paths into the object file, and we end up trying to compute a path relative to
the compilation directory.
It looks like clang has some code in CGDebugInfo::CreateCompileUnit which
processes the "-main-file-name" differently from
MCContext::setGenDwarfRootFile; I think that's related.</pre>
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