54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
// RUN: %clang_safestack %s -pthread -o %t
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// RUN: %run %t
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// Test unsafe stack deallocation with custom stack sizes, in particular ensure
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// that we correctly deallocate small stacks and don't accidentally deallocate
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// adjacent memory.
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#include <pthread.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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volatile int step = 0;
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void *wait_until(void *ptr) {
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while ((int)ptr != step)
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usleep(1000);
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volatile char buf[64];
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buf[0] = 0;
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return NULL;
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}
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int main(int argc, char **argv) {
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pthread_t t1, t2, t3;
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pthread_attr_t small_stack_attr;
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pthread_attr_init(&small_stack_attr);
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pthread_attr_setstacksize(&small_stack_attr, 65536);
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if (pthread_create(&t3, NULL, wait_until, (void *)3))
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abort();
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if (pthread_create(&t1, &small_stack_attr, wait_until, (void *)1))
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abort();
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if (pthread_create(&t2, NULL, wait_until, (void *)2))
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abort();
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step = 1;
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if (pthread_join(t1, NULL))
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abort();
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step = 2;
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if (pthread_join(t2, NULL))
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abort();
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step = 3;
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if (pthread_join(t3, NULL))
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abort();
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pthread_attr_destroy(&small_stack_attr);
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return 0;
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}
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