80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <pthread.h>
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#if defined(__linux__)
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#include <sys/prctl.h>
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#endif
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volatile int g_thread_2_continuing = 0;
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void *
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thread_1_func (void *input)
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{
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// Waiting to be released by the debugger.
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while (!g_thread_2_continuing) // The debugger will change this value
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{
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usleep(1);
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}
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// Return
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return NULL; // Set third breakpoint here
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}
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void *
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thread_2_func (void *input)
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{
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// Waiting to be released by the debugger.
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int child_thread_continue = 0;
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while (!child_thread_continue) // The debugger will change this value
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{
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usleep(1); // Set second breakpoint here
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}
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// Release thread 1
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g_thread_2_continuing = 1;
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// Return
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return NULL;
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}
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int main(int argc, char const *argv[])
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{
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pthread_t thread_1;
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pthread_t thread_2;
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#if defined(__linux__)
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// Immediately enable any ptracer so that we can allow the stub attach
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// operation to succeed. Some Linux kernels are locked down so that
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// only an ancestor process can be a ptracer of a process. This disables that
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// restriction. Without it, attach-related stub tests will fail.
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#if defined(PR_SET_PTRACER) && defined(PR_SET_PTRACER_ANY)
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int prctl_result;
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// For now we execute on best effort basis. If this fails for
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// some reason, so be it.
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prctl_result = prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);
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(void) prctl_result;
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#endif
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#endif
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// Create a new thread
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pthread_create (&thread_1, NULL, thread_1_func, NULL);
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// Waiting to be attached by the debugger.
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int main_thread_continue = 0;
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while (!main_thread_continue) // The debugger will change this value
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{
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usleep(1); // Set first breakpoint here
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}
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// Create another new thread
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pthread_create (&thread_2, NULL, thread_2_func, NULL);
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// Wait for the threads to finish.
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pthread_join(thread_1, NULL);
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pthread_join(thread_2, NULL);
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printf("Exiting now\n");
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}
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