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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - exception is not ABI-compatible with libstdc++"
href="https://bugs.llvm.org/show_bug.cgi?id=49037">49037</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>exception is not ABI-compatible with libstdc++
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>yichen.yan@inf.ethz.ch
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24482" name="attach_24482" title="make run">attachment 24482</a> <a href="attachment.cgi?id=24482&action=edit" title="make run">[details]</a></span>
make run
If I'm not mistaken,
<span class="quote">> ABI compatibility with gcc's libstdc++ for some low-level features such as exception objects...</span >
means that we can use libraries compiled with libstdc++ with libc++ and the
exception works well.
I found the case that try-catch statement is not working as expected, which
seems due to some ABI issue.
root@10155041665b:/test# make run
g++ -c lib.cc -fpic -o lib.o```
g++ -nostdinc++ -I/libcxx-install-11/include/c++/v1 -nodefaultlibs
-L/libcxx-install-11/lib -lc++ -lc++abi -lm -lc -lgcc_s -lgcc \
main.cc lib.o -o a.out
LD_LIBRARY_PATH=/libcxx-install-11/lib ./a.out
2
root@10155041665b:/test# cat main.cc
#include <iostream>
#include "lib.h"
int main() {
try {
throw gen();
} catch (const e& exp) {
std::cout << 1 << std::endl;
} catch (...) {
std::cout << 2 << std::endl;
}
}
root@10155041665b:/test# cat lib.cc
#include "lib.h"
std::runtime_error gen() {
return e("");
}
root@10155041665b:/test# cat lib.h
#include <stdexcept>
struct e : public std::runtime_error {
explicit e(const char* what) :
std::runtime_error(what) {
}
};
std::runtime_error gen();</pre>
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