http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51135
Bug #: 51135
Summary: SIGSEGV during exception cleanup on win32
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: libstdc++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: gurnec-b...@gis.net
It looks like __thiscall is now the default calling convention for member
functions (where possible) for win32 targets. This seems to have broken
exception cleanup.
This seg faults when executed (and compiled by mingw-32):
===============
struct except {
virtual ~except() {}
};
int main() {
try {
throw except();
} catch(except) {
}
}
===============
The seg fault occurs after the catch block is exited, and except::~except() is
called by the runtime. I think __gxx_exception_cleanup (in
libstdc++-v3/libsupc++/eh_throw.cc) is still trying to call except::~except()
using the old calling convention, resulting in a seg fault on any access to
'this'.
-Chris
