98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
// This test is intended to create a situation in which one thread will exit
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// while a breakpoint is being handled in another thread. This may not always
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// happen because it's possible that the exiting thread will exit before the
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// breakpoint is hit. The test case should be flexible enough to treat that
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// as success.
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#include "pseudo_barrier.h"
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#include <chrono>
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#include <thread>
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volatile int g_test = 0;
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// A barrier to synchronize all the threads.
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pseudo_barrier_t g_barrier1;
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// A barrier to keep the threads from exiting until after the breakpoint has
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// been passed.
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pseudo_barrier_t g_barrier2;
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void *
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break_thread_func ()
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{
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// Wait until all the threads are running
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pseudo_barrier_wait(g_barrier1);
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// Wait for the join thread to join
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std::this_thread::sleep_for(std::chrono::microseconds(50));
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// Do something
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g_test++; // Set breakpoint here
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// Synchronize after the breakpoint
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pseudo_barrier_wait(g_barrier2);
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// Return
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return NULL;
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}
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void *
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wait_thread_func ()
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{
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// Wait until the entire first group of threads is running
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pseudo_barrier_wait(g_barrier1);
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// Wait until the breakpoint has been passed
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pseudo_barrier_wait(g_barrier2);
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// Return
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return NULL;
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}
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void *
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join_thread_func (void *input)
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{
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std::thread *thread_to_join = (std::thread *)input;
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// Sync up with the rest of the threads.
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pseudo_barrier_wait(g_barrier1);
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// Join the other thread
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thread_to_join->join();
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// Return
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return NULL;
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}
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int main ()
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{
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// The first barrier waits for the non-joining threads to start.
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// This thread will also participate in that barrier.
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// The idea here is to guarantee that the joining thread will be
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// last in the internal list maintained by the debugger.
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pseudo_barrier_init(g_barrier1, 5);
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// The second barrier keeps the waiting threads around until the breakpoint
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// has been passed.
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pseudo_barrier_init(g_barrier2, 4);
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// Create a thread to hit the breakpoint
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std::thread thread_1(break_thread_func);
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// Create more threads to slow the debugger down during processing.
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std::thread thread_2(wait_thread_func);
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std::thread thread_3(wait_thread_func);
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std::thread thread_4(wait_thread_func);
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// Create a thread to join the breakpoint thread
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std::thread thread_5(join_thread_func, &thread_1);
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// Wait for the threads to finish
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thread_5.join(); // implies thread_1 is already finished
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thread_4.join();
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thread_3.join();
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thread_2.join();
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return 0;
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}
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