<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 - __PRETTY_FUNCTION__ leaks absolute paths even with -fmacro-prefix-map"
href="https://bugs.llvm.org/show_bug.cgi?id=52360">52360</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>__PRETTY_FUNCTION__ leaks absolute paths even with -fmacro-prefix-map
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>vesko.karaganev@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>The `-fmacro-prefix-map` option remaps "file source paths in predefined
preprocessor macros and __builtin_FILE()". The __PRETTY_FUNCTION__ predefined
macro expands to a string, which can contain absolute file paths when the
function signature includes a lambda as a template parameter.
```cpp
template <typename F>
void a() {
const char* file = __FILE__;
const char* func = __PRETTY_FUNCTION__;
}
int main() {
auto f = []() { return 0; };
a<decltype(f)>();
}
```
When the above code is compiled with `-fmacro-prefix-map=$SRCDIR=/TEST`, the
paths in the expansion of `__PRETTY_FUNCTION__` are not remapped.
The output binary contains:
```
void a() [F = (lambda at /app/example.cpp:8:14)]
```
Compiler Explorer: <a href="https://godbolt.org/z/8vYW84oMv">https://godbolt.org/z/8vYW84oMv</a></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>