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// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
// REQUIRES: linux
#include "test.h"
#include <pthread.h>
#include <sys/types.h>
#include <unistd.h>
long count_memory_mappings() {
pid_t my_pid = getpid();
char proc_file_name[128];
snprintf(proc_file_name, sizeof(proc_file_name), "/proc/%d/maps", my_pid);
FILE *proc_file = fopen(proc_file_name, "r");
long line_count = 0;
int c;
do {
c = fgetc(proc_file);
if (c == '\n') {
line_count++;
}
} while (c != EOF);
fclose(proc_file);
return line_count;
}
void fiber_iteration() {
void *orig_fiber = __tsan_get_current_fiber();
void *fiber = __tsan_create_fiber(0);
pthread_mutex_t mutex;
pthread_mutex_init(&mutex, NULL);
// Running some code on the fiber that triggers handling of pending signals.
__tsan_switch_to_fiber(fiber, 0);
pthread_mutex_lock(&mutex);
pthread_mutex_unlock(&mutex);
__tsan_switch_to_fiber(orig_fiber, 0);
// We expect the fiber to clean up all resources (here the sigcontext) when destroyed.
__tsan_destroy_fiber(fiber);
}
// Magic-Number for some warmup iterations,
// as tsan maps some memory for the first runs.
const size_t num_warmup = 100;
int main() {
for (size_t i = 0; i < num_warmup; i++) {
fiber_iteration();
}
long memory_mappings_before = count_memory_mappings();
fiber_iteration();
fiber_iteration();
long memory_mappings_after = count_memory_mappings();
// Is there a better way to detect a resource leak in the
// ThreadState object? (i.e. a mmap not being freed)
if (memory_mappings_before == memory_mappings_after) {
fprintf(stderr, "PASS\n");
} else {
fprintf(stderr, "FAILED\n");
}
return 0;
}
// CHECK-NOT: WARNING: ThreadSanitizer:
// CHECK: PASS
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