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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - compiler crash when using large array with sanitizers"
href="https://bugs.llvm.org/show_bug.cgi?id=52075">52075</a>
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<th>Summary</th>
<td>compiler crash when using large array with sanitizers
</td>
</tr>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>12.0
</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>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>k.even-mendoza@imperial.ac.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>This code example with -O0 -fsanitize=address:
void c() {
char e[][(65002)][65002] = {{}, {}, {}, {}, {(6)}, {{}, (6)}};
}
int main() {
return 0;
}
crashed the compiler (llvm 13 built with msan), with this generic error:
input/setA/3abd6bfec6d4e7b15a96782462b8a08d50355bbf.c
clang-13: error: unable to execute command: Killed
clang-13: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 13.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
2153cad11ba252698c21d48723265ca7f4850a29)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/user42/data/builds_msan_13/llvm-130-build_NO_D_A_memsan/bin
clang-13: note: diagnostic msg:
********************PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-13: note: diagnostic msg:
/tmp/3abd6bfec6d4e7b15a96782462b8a08d50355bbf-e1e531.c
clang-13: note: diagnostic msg:
/tmp/3abd6bfec6d4e7b15a96782462b8a08d50355bbf-e1e531.sh
clang-13: note: diagnostic msg:********************
It happens with llvm 11,12 and 13.
I would expect an out-of-memory error or a warning regarding the size of the
array during compilation, but the compiler returns a generic error of the
crash. The original program was large, so it was not clear what is the problem
before reducing the program to the small code example here.</pre>
</div>
</p>
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