https://bugs.llvm.org/show_bug.cgi?id=41396
Bug ID: 41396
Summary: libc++abi should report forced unwinding on thread
termination.
Product: libc++abi
Version: 7.0
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedb...@nondot.org
Reporter: e...@efcs.ca
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
libstdc++ throws an exception when forced unwinding occurs, for example by a
call to pthread_exit.
This allows the library to detect and avoid certain classes of bugs. For
example, libc++ hangs forever on this test, libstdc++ reports the promise as
broken.
#include <future>
#include <stdexcept>
#include <pthread.h>
#include <cassert>
void f() { pthread_exit(nullptr); }
int main()
{
auto fut = std::async(std::launch::async, f);
try
{
fut.get();
throw std::logic_error("Unreachable");
}
catch (const std::future_error& e)
{
assert( e.code() == std::future_errc::broken_promise );
}
}
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