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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Update documentation on linking DSOs with -fsanitize=address"
href="https://bugs.llvm.org/show_bug.cgi?id=42177">42177</a>
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<th>Summary</th>
<td>Update documentation on linking DSOs with -fsanitize=address
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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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>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dilyan.palauzov@aegee.org
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
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<pre>Per <a href="https://github.com/google/sanitizers/issues/1086">https://github.com/google/sanitizers/issues/1086</a> update
<a href="https://clang.llvm.org/docs/AddressSanitizer.html">https://clang.llvm.org/docs/AddressSanitizer.html</a> to state, that:
- Linking DSOs with -fsanitize=address does nothing.
- Linking DSOs with -fsanitize=address -libsan-shared helps with the undefined
symbols for the linker, by adding a DL_NEEDED entry, but at run time this entry
is not used: the symbols have to be loaded either within the executable, or the
asan-runtime has to be loaded with LD_PRELOAD
- Discourage the use of -fsanitize=address -libsan-static, as it is not
documented
The statement “ When linking shared libraries, the AddressSanitizer run-time is
not linked, so -Wl,-z,defs may cause link errors (don’t use it with
AddressSanitizer).” is not correct, when -libsan-shared is used.</pre>
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