91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
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// RUN: %clang_analyze_cc1 -analyzer-checker=alpha.core.C11Lock -verify %s
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typedef int mtx_t;
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struct timespec;
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enum {
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// FIXME: The value if this enum is implementation defined. While all the
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// implementations I am aware of using 0, the right solution would be to
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// look this value up in the AST (and disable the check if it is not found).
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thrd_success = 0,
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thrd_error = 2
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};
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int mtx_init(mtx_t *mutex, int type);
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int mtx_lock(mtx_t *mutex);
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int mtx_timedlock(mtx_t *mutex,
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const struct timespec *time_point);
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int mtx_trylock(mtx_t *mutex);
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int mtx_unlock(mtx_t *mutex);
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int mtx_destroy(mtx_t *mutex);
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mtx_t mtx1;
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mtx_t mtx2;
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void bad1(void)
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{
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mtx_lock(&mtx1); // no-warning
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mtx_lock(&mtx1); // expected-warning{{This lock has already been acquired}}
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}
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void bad2(void) {
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mtx_t mtx;
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mtx_init(&mtx, 0);
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mtx_lock(&mtx);
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} // TODO: Warn for missing unlock?
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void bad3(void) {
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mtx_t mtx;
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mtx_init(&mtx, 0);
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} // TODO: Warn for missing destroy?
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void bad4(void) {
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mtx_t mtx;
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mtx_init(&mtx, 0);
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mtx_lock(&mtx);
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mtx_unlock(&mtx);
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} // TODO: warn for missing destroy?
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void bad5(void) {
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mtx_lock(&mtx1);
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mtx_unlock(&mtx1);
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mtx_unlock(&mtx1); // expected-warning {{This lock has already been unlocked}}
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}
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void bad6() {
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mtx_init(&mtx1, 0);
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if (mtx_trylock(&mtx1) != thrd_success)
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mtx_unlock(&mtx1); // expected-warning {{This lock has already been unlocked}}
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}
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void bad7(void) {
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mtx_lock(&mtx1);
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mtx_lock(&mtx2);
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mtx_unlock(&mtx1); // expected-warning {{This was not the most recently acquired lock. Possible lock order reversal}}
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mtx_unlock(&mtx2);
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}
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void good() {
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mtx_t mtx;
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mtx_init(&mtx, 0);
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mtx_lock(&mtx);
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mtx_unlock(&mtx);
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mtx_destroy(&mtx);
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}
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void good2() {
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mtx_t mtx;
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mtx_init(&mtx, 0);
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if (mtx_trylock(&mtx) == thrd_success)
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mtx_unlock(&mtx);
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mtx_destroy(&mtx);
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}
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void good3() {
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mtx_t mtx;
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mtx_init(&mtx, 0);
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if (mtx_timedlock(&mtx, 0) == thrd_success)
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mtx_unlock(&mtx);
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mtx_destroy(&mtx);
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}
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