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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - scan-build exits successfully if subordinate command is killed by a signal"
href="https://bugs.llvm.org/show_bug.cgi?id=41501">41501</a>
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<th>Summary</th>
<td>scan-build exits successfully if subordinate command is killed by a signal
</td>
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<th>Product</th>
<td>clang
</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
</td>
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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
</td>
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<th>Component</th>
<td>Static Analyzer
</td>
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<th>Assignee</th>
<td>dcoughlin@apple.com
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<th>Reporter</th>
<td>nbowler@draconx.ca
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<th>CC</th>
<td>dcoughlin@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>If the build command is killed by a signal, scan-build ignores this fact
and returns everythign is A-OK. For example, to demonstrate:
% scan-build /bin/sh -c 'kill -TERM $$; sleep 5; exit 42' ; echo status is $?
[...]
scan-build: No bugs found.
exit status is 0
Or alternately since perl ignores SIGINT during the execution of a system()
function, one can typically just ctrl+c the build and this will kill just
the child process. Then scan-build will (depending on timing) exit
successfully with a status of 0.
This appears to be because whenever scan-build script calls perl's system
function it calls it like this:
return (system(@$Args) >> 8);
which is explicitly discarding the status of the child process in cases where
it dies due to a signal...
Since the build has failed due to the compiler being killed, I had expected
scan-build to at least return some indication of this failure...</pre>
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