https://llvm.org/bugs/show_bug.cgi?id=25162
Bug ID: 25162
Summary: [WinEH] cleanuppad funclets for C++ EH cannot catch
exceptions
Product: clang
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: unassignedclangb...@nondot.org
Reporter: r...@google.com
CC: david.majne...@gmail.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
Consider this example:
extern "C" int puts(const char *);
struct HasDtor {
/*__forceinline*/ ~HasDtor() {
try {
throw 2;
} catch (int) {
puts("catch ~HasDtor");
}
}
};
int main() {
try {
HasDtor o;
throw 1;
} catch (int) {
puts("catch main");
}
}
clang-cl can compile and run this as expected with the __forceinline commented
out, but uncommenting it makes the program call std::terminate at runtime.
Right now our C++ cleanup funclets don't have pointers to cppxdata. It's not
clear to me if we can make cleanup funclets just like catch handlers here,
where the cleanup funclet references the parent xdata table. If we can do that,
then this will be easy.
If cleanup funclets need their own xdata tables, then we have to change things
up a bit.
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