<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [LLVM-COV] Wrong coverage with the comparison of extern function pointer and NULL"
href="https://bugs.llvm.org/show_bug.cgi?id=37102">37102</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[LLVM-COV] Wrong coverage with the comparison of extern function pointer and NULL
</td>
</tr>
<tr>
<th>Product</th>
<td>Runtime Libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>libprofile library
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>yangyibiao@nju.edu.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ cat small.c
#include <stdlib.h>
extern int (*_Unwind_RaiseException) (void *) __attribute__((weak));
int main(void)
{
if (&_Unwind_RaiseException != NULL)
return 0;
return 1;
}
$ clang -O0 -g -fcoverage-mapping -fprofile-instr-generate=small.profraw
small.c; ./a.out; llvm-profdata merge small.profraw -o small.profdata; llvm-cov
show a.out -instr-profile=small.profdata small.c > small.gcov; cat small.gcov
1| |#include <stdlib.h>
2| |
3| |extern int (*_Unwind_RaiseException) (void *)
__attribute__((weak));
4| |
5| |int main(void)
6| 1|{
7| 1| if (&_Unwind_RaiseException != NULL)
8| 1| return 0;
9| 1| return 1;
10| 1|}
Line #8 is wrongly marked as executed.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>