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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - UBSAN in ./compiler-rt/lib/asan/asan_allocator.cpp"
href="https://bugs.llvm.org/show_bug.cgi?id=52385">52385</a>
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<th>Summary</th>
<td>UBSAN in ./compiler-rt/lib/asan/asan_allocator.cpp
</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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>asan
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mliska@suse.cz
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
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<pre>I noticed the 2 following warnings on i686:
/home/marxin/Programming/gcc/libsanitizer/asan/asan_allocator.cpp: In member
function ‘__sanitizer::uptr __asan::ChunkHeader::UsedSize() const’:
/home/marxin/Programming/gcc/libsanitizer/asan/asan_allocator.cpp:107:41:
warning: left shift count >= width of type [-Wshift-count-overflow]
107 | R += (uptr)user_requested_size_hi << (8 *
sizeof(user_requested_size_lo));
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/marxin/Programming/gcc/libsanitizer/asan/asan_allocator.cpp: In member
function ‘void __asan::ChunkHeader::SetUsedSize(__sanitizer::uptr)’:
/home/marxin/Programming/gcc/libsanitizer/asan/asan_allocator.cpp:114:12:
warning: right shift count >= width of type [-Wshift-count-overflow]
114 | size >>= (8 * sizeof(user_requested_size_lo));
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</pre>
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