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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - fsanitize-coverage=trace-pc incompatible with -fsanitze=bounds and -fsanitize=thread"
href="https://bugs.llvm.org/show_bug.cgi?id=45831">45831</a>
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<th>Summary</th>
<td>fsanitize-coverage=trace-pc incompatible with -fsanitze=bounds and -fsanitize=thread
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
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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>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>arnd@linaro.org
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>clang disables '-fsanitize-coverage=trace-pc' whenever '-fsanitize=bounds' or
'-fsanitize=thread' are also passed, but the Linux kernel tries to use both
together:
$ clang-11 -Werror=unused-command-line-argument -fsanitize-coverage=trace-pc
-fsanitize=bounds -fsanitize=thread -xc /dev/null
clang: error: argument unused during compilation:
'-fsanitize-coverage=trace-pc' [-Werror,-Wunused-command-line-argument]
According to the discussion at
<a href="https://lore.kernel.org/lkml/20200505142341.1096942-1-arnd@arndb.de/T/">https://lore.kernel.org/lkml/20200505142341.1096942-1-arnd@arndb.de/T/</a>
we really want to use them -fsanitize-coverage=trace-pc together with one or
both of the other two, as we do with gcc. So far we have not been able to
determine whether disallowing the combination is an intentional restriction or
just a mistake in the handling of the command line arguments.</pre>
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