diff options
Diffstat (limited to 'executor/common_linux.h')
| -rw-r--r-- | executor/common_linux.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/executor/common_linux.h b/executor/common_linux.h index fc60e3a70..421486ed5 100644 --- a/executor/common_linux.h +++ b/executor/common_linux.h @@ -11,6 +11,7 @@ #include <sys/syscall.h> #include <unistd.h> #if defined(SYZ_EXECUTOR) || defined(SYZ_THREADED) || defined(SYZ_COLLIDE) +#include <linux/futex.h> #include <pthread.h> #include <stdlib.h> #endif @@ -1045,3 +1046,66 @@ void loop() } #endif #endif + +#if defined(SYZ_THREADED) +struct thread_t { + int created, running, call; + pthread_t th; +}; + +static struct thread_t threads[16]; +static void execute_call(int call); +static int running; +#if defined(SYZ_COLLIDE) +static int collide; +#endif + +static void* thr(void* arg) +{ + struct thread_t* th = (struct thread_t*)arg; + for (;;) { + while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) + syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0); + execute_call(th->call); + __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); + __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE); + syscall(SYS_futex, &th->running, FUTEX_WAKE); + } + return 0; +} + +static void execute(int num_calls) +{ + int call, thread; + running = 0; + for (call = 0; call < num_calls; call++) { + for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) { + struct thread_t* th = &threads[thread]; + if (!th->created) { + th->created = 1; + pthread_attr_t attr; + pthread_attr_init(&attr); + pthread_attr_setstacksize(&attr, 128 << 10); + pthread_create(&th->th, &attr, thr, th); + } + if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) { + th->call = call; + __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); + __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE); + syscall(SYS_futex, &th->running, FUTEX_WAKE); +#if defined(SYZ_COLLIDE) + if (collide && call % 2) + break; +#endif + struct timespec ts; + ts.tv_sec = 0; + ts.tv_nsec = 20 * 1000 * 1000; + syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts); + if (running) + usleep((call == num_calls - 1) ? 10000 : 1000); + break; + } + } + } +} +#endif |