| 1 | // This test is intended to create a situation in which one thread will exit |
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| 2 | // while the debugger is stepping in another thread. |
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| 3 | |
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| 4 | #include "pseudo_barrier.h" |
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| 5 | #include <thread> |
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| 6 | |
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| 7 | #define do_nothing() |
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| 8 | |
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| 9 | // A barrier to synchronize thread start. |
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| 10 | pseudo_barrier_t g_barrier; |
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| 11 | |
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| 12 | volatile int g_thread_exited = 0; |
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| 13 | |
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| 14 | volatile int g_test = 0; |
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| 15 | |
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| 16 | void * |
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| 17 | step_thread_func () |
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| 18 | { |
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| 19 | // Wait until both threads are started. |
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| 20 | pseudo_barrier_wait(g_barrier); |
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| 21 | |
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| 22 | g_test = 0; // Set breakpoint here |
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| 23 | |
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| 24 | while (!g_thread_exited) |
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| 25 | g_test++; |
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| 26 | |
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| 27 | // One more time to provide a continue point |
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| 28 | g_test++; // Continue from here |
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| 29 | |
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| 30 | // Return |
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| 31 | return NULL; |
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| 32 | } |
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| 33 | |
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| 34 | void * |
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| 35 | exit_thread_func () |
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| 36 | { |
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| 37 | // Wait until both threads are started. |
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| 38 | pseudo_barrier_wait(g_barrier); |
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| 39 | |
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| 40 | // Wait until the other thread is stepping. |
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| 41 | while (g_test == 0) |
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| 42 | do_nothing(); |
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| 43 | |
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| 44 | // Return |
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| 45 | return NULL; |
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| 46 | } |
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| 47 | |
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| 48 | int main () |
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| 49 | { |
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| 50 | // Synchronize thread start so that doesn't happen during stepping. |
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| 51 | pseudo_barrier_init(g_barrier, 2); |
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| 52 | |
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| 53 | // Create a thread to hit the breakpoint. |
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| 54 | std::thread thread_1(step_thread_func); |
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| 55 | |
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| 56 | // Create a thread to exit while we're stepping. |
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| 57 | std::thread thread_2(exit_thread_func); |
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| 58 | |
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| 59 | // Wait for the exit thread to finish. |
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| 60 | thread_2.join(); |
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| 61 | |
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| 62 | // Let the stepping thread know the other thread is gone. |
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| 63 | g_thread_exited = 1; |
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| 64 | |
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| 65 | // Wait for the stepping thread to finish. |
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| 66 | thread_1.join(); |
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| 67 | |
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| 68 | return 0; |
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| 69 | } |
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| 70 | |
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