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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Segmentation fault with attribute aligned"
href="https://llvm.org/bugs/show_bug.cgi?id=26334">26334</a>
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<tr>
<th>Summary</th>
<td>Segmentation fault with attribute aligned
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.6
</td>
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<tr>
<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>wangynustc@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>Currently, I am working on a big project with clang. I met a segmentation fault
when compile the project with clang. Here is the sample code:
#include <stdio.h>
#include <stdint.h>
typedef __attribute__ ((aligned (16))) struct uint128_t_str {
uint64_t i1;
uint64_t i2;
} uint128_t;
uint128_t data = {0xBADBEEF, 0xDEADBEEF};
uint128_t GetData() {
return data;
}
int main() {
uint128_t val;
int i = 0;
val = GetData();
}
==============================================
I compile it with clang -O0 -m32 test.c, it will crash with segmentation fault
while gcc is OK.
I think it's because clang does not align some data to the specific address,
but not very sure.</pre>
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