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//===-- 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 <pthread.h>
#include <atomic>
// 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 (void *input)
{
// 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 ()
{
pthread_t thread_1;
pthread_t thread_2;
// Don't let either thread do anything until they're both ready.
pseudo_barrier_init(g_barrier, 2);
// Create two threads
pthread_create (&thread_1, NULL, thread_func, NULL);
pthread_create (&thread_2, NULL, thread_func, NULL);
// Wait for the threads to finish
pthread_join(thread_1, NULL);
pthread_join(thread_2, NULL);
return 0;
}
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