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<base href="https://llvm.org/bugs/" />
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - TestCases/Linux/coverage-missing.cc fails on i686"
href="https://llvm.org/bugs/show_bug.cgi?id=23445">23445</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>TestCases/Linux/coverage-missing.cc fails on i686
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hjl.tools@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>sancov.py thinks i686 has an extra instrumented PC:
08137fc0 <__sanitizer_cov_with_check>:
8137fc0: 53 push %ebx
8137fc1: 83 ec 18 sub $0x18,%esp
8137fc4: 8b 44 24 20 mov 0x20(%esp),%eax
8137fc8: e8 93 55 f2 ff call 805d560 <__x86.get_pc_thunk.bx>
8137fcd: 81 c3 07 82 03 00 add $0x38207,%ebx
8137fd3: 8b 10 mov (%eax),%edx
8137fd5: 85 d2 test %edx,%edx
8137fd7: 78 07 js 8137fe0
<__sanitizer_cov_with_check+0x20>
8137fd9: 83 c4 18 add $0x18,%esp
8137fdc: 5b pop %ebx
8137fdd: c3 ret
8137fde: 66 90 xchg %ax,%ax
8137fe0: 89 04 24 mov %eax,(%esp)
8137fe3: e8 18 ff ff ff call 8137f00 <__sanitizer_cov>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This instrumented PC is uncounted for.
8137fe8: 83 c4 18 add $0x18,%esp
8137feb: 5b pop %ebx
8137fec: c3 ret
8137fed: 8d 76 00 lea 0x0(%esi),%esi
while x86-64 has
00000000004ce850 <__sanitizer_cov_with_check>:
4ce850: 8b 07 mov (%rdi),%eax
4ce852: 85 c0 test %eax,%eax
4ce854: 78 0a js 4ce860
<__sanitizer_cov_with_check+0x10>
4ce856: f3 c3 repz retq
4ce858: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
4ce85f: 00
4ce860: e9 0b ff ff ff jmpq 4ce770 <__sanitizer_cov>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
4ce865: 90 nop
4ce866: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
4ce86d: 00 00 00</pre>
</div>
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