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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DFSan crashes on invoke with variadic function"
href="https://llvm.org/bugs/show_bug.cgi?id=26068">26068</a>
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</tr>
<tr>
<th>Summary</th>
<td>DFSan crashes on invoke with variadic function
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Miscellaneous Instrumentation passes
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>benny.kra@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, peter@pcc.me.uk
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat foo.cc
void myprintf(...);
int main() {
try {
myprintf(42);
} catch (...) {
}
}
$ clang++ -fsanitize=dataflow foo.c
clang-3.8: llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp:1417: void
(anonymous namespace)::DFSanVisitor::visitCallSite(llvm::CallSite): Assertion
`!(cast<FunctionType>(
CS.getCalledValue()->getType()->getPointerElementType())->isVarArg() &&
dyn_cast<InvokeInst>(CS.getInstruction()))' failed.
This also happens when building libc++ with dfsan.</pre>
</div>
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