64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
//===-- main.cpp ------------------------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// This test is intended to create a situation in which two threads are stopped
|
|
// at a breakpoint and the debugger issues a step-out command.
|
|
|
|
#include <atomic>
|
|
#include <thread>
|
|
|
|
// Note that although hogging the CPU while waiting for a variable to change
|
|
// would be terrible in production code, it's great for testing since it
|
|
// avoids a lot of messy context switching to get multiple threads synchronized.
|
|
#define do_nothing()
|
|
|
|
#define pseudo_barrier_wait(bar) \
|
|
--bar; \
|
|
while (bar > 0) \
|
|
do_nothing();
|
|
|
|
#define pseudo_barrier_init(bar, count) (bar = count)
|
|
|
|
std::atomic_int g_barrier;
|
|
|
|
volatile int g_test = 0;
|
|
|
|
void step_out_of_here() {
|
|
g_test += 5; // Set breakpoint here
|
|
}
|
|
|
|
void *
|
|
thread_func ()
|
|
{
|
|
// Wait until both threads are running
|
|
pseudo_barrier_wait(g_barrier);
|
|
|
|
// Do something
|
|
step_out_of_here(); // Expect to stop here after step-out (clang)
|
|
|
|
// Return
|
|
return NULL; // Expect to stop here after step-out (icc and gcc)
|
|
}
|
|
|
|
int main ()
|
|
{
|
|
// Don't let either thread do anything until they're both ready.
|
|
pseudo_barrier_init(g_barrier, 2);
|
|
|
|
// Create two threads
|
|
std::thread thread_1(thread_func);
|
|
std::thread thread_2(thread_func);
|
|
|
|
// Wait for the threads to finish
|
|
thread_1.join();
|
|
thread_2.join();
|
|
|
|
return 0;
|
|
}
|