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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Incorrect child stack alignment in test/asan/TestCases/Linux/clone_test.cc"
href="https://llvm.org/bugs/show_bug.cgi?id=27191">27191</a>
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<th>Summary</th>
<td>Incorrect child stack alignment in test/asan/TestCases/Linux/clone_test.cc
</td>
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<th>Product</th>
<td>compiler-rt
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>compiler-rt
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>hjl.tools@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>test/asan/TestCases/Linux/clone_test.cc has
int main(int argc, char **argv) {
int i;
const int kStackSize = 1 << 20;
char child_stack[kStackSize + 1];
char *sp = child_stack + kStackSize; /* Stack grows down. */
printf("Parent: %p\n", sp);
pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0);
There is no guarantee that "sp" will be aligned at 16 bytes, which
is required by x86 psABIs. It should be changed to
char child_stack[kStackSize + 1] __attribute__ ((aligned (16)));</pre>
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