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//===-- main.cpp ------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// This test is intended to create a situation in which one thread will exit
// while the debugger is stepping in another thread.
#include "pseudo_barrier.h"
#include <thread>
#define do_nothing()
// A barrier to synchronize thread start.
pseudo_barrier_t g_barrier;
volatile int g_thread_exited = 0;
volatile int g_test = 0;
void *
step_thread_func ()
{
// Wait until both threads are started.
pseudo_barrier_wait(g_barrier);
g_test = 0; // Set breakpoint here
while (!g_thread_exited)
g_test++;
// One more time to provide a continue point
g_test++; // Continue from here
// Return
return NULL;
}
void *
exit_thread_func ()
{
// Wait until both threads are started.
pseudo_barrier_wait(g_barrier);
// Wait until the other thread is stepping.
while (g_test == 0)
do_nothing();
// Return
return NULL;
}
int main ()
{
// Synchronize thread start so that doesn't happen during stepping.
pseudo_barrier_init(g_barrier, 2);
// Create a thread to hit the breakpoint.
std::thread thread_1(step_thread_func);
// Create a thread to exit while we're stepping.
std::thread thread_2(exit_thread_func);
// Wait for the exit thread to finish.
thread_2.join();
// Let the stepping thread know the other thread is gone.
g_thread_exited = 1;
// Wait for the stepping thread to finish.
thread_1.join();
return 0;
}
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