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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - faulty segfault with llvm::TargetMachine"
href="https://bugs.llvm.org/show_bug.cgi?id=39003">39003</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>faulty segfault with llvm::TargetMachine
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>blitzrakete@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>clang produces a binary that segfaults for the following code using LLVM
headers:
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetMachine.h"
#include <string>
int main() {
llvm::InitializeNativeTarget();
const char *Triple = "x86_64-unknown-linux-gnu";
std::string Error;
auto Target = llvm::TargetRegistry::lookupTarget(Triple, Error);
if (!Target) return EXIT_FAILURE;
Target->createTargetMachine(Triple, "generic", "", {}, {}); // SEGFAULT here
}
g++ compiles the code correctly. This code assumes a native triple, but I just
hardcoded it to reduce the test case even further. Calling
TargetRegistry::lookupTarget doesn't change the behavior of clang or gcc.
(here's a link to that version: <a href="https://godbolt.org/z/Bn9rvj">https://godbolt.org/z/Bn9rvj</a>)
I'm using clang r342558 with LLVM r342558 too.
My compiler flags are:
clang++ -O3 test.cpp `llvm-config --ldflags --system-libs --libs all` -o test
-fno-rtti
For g++ I use the exact same flags, just with a 'g++' at the front instead of
'clang++'.</pre>
</div>
</p>
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