Import of the watch repository from Pebble

2025-05-22 11:24:52 +00:00 · 2024-12-12 16:43:03 -08:00 · 2024-12-12 16:43:03 -08:00 · 3b92768480
commit 3b92768480
10334 changed files with 2564465 additions and 0 deletions
--- a/checkers/test-programs/mutex-test.c
+++ b/checkers/test-programs/mutex-test.c
@ -0,0 +1,153 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdbool.h>
+
+struct Mutex;
+struct RecursiveMutex;
+
+typedef struct Mutex * restrict mutex_t;
+typedef struct RecursiveMutex * recursive_mutex_t;
+
+extern void mutex_lock(mutex_t);
+extern void mutex_unlock(mutex_t);
+
+extern bool mutex_lock_with_timeout(mutex_t);
+
+extern void mutex_lock_recursive(recursive_mutex_t);
+extern void mutex_unlock_recursive(recursive_mutex_t);
+
+static mutex_t global_lock = 0;
+static mutex_t global_lock2;
+mutex_t recursive_lock;
+
+void nounlock() {
+  mutex_lock(global_lock);
+}
+
+void nolock() {
+  mutex_unlock(global_lock);
+}
+
+void normal() {
+  mutex_lock(global_lock);
+  mutex_unlock(global_lock);
+}
+
+struct handle {
+  mutex_t m;
+} m_wrapper;
+
+extern int do_stuff(struct handle * h);
+
+void structthing(struct handle * h) {
+  mutex_lock(h->m);
+  do_stuff(h);
+  mutex_unlock(h->m);
+}
+
+extern int do_stuff2();
+
+void stuff() {
+  mutex_lock(global_lock);
+
+  do_stuff2();
+
+  mutex_unlock(global_lock);
+}
+
+void stuff2() {
+  mutex_lock(m_wrapper.m);
+
+  do_stuff2();
+
+  mutex_unlock(m_wrapper.m);
+}
+
+void nest2() {
+  mutex_lock(global_lock);
+  printf("blah %p", global_lock);
+  mutex_unlock(global_lock);
+}
+
+void nest() {
+  nest2();
+}
+
+void cond(void *glob_ptr) {
+  mutex_lock(global_lock);
+
+  while (glob_ptr) {
+    printf("blah %p", glob_ptr);
+  }
+
+  mutex_unlock(global_lock);
+}
+
+void timeout() {
+  mutex_lock_with_timeout(global_lock);
+
+  mutex_unlock(global_lock);
+}
+
+void good_timeout() {
+  if (mutex_lock_with_timeout(global_lock)) {
+    mutex_unlock(global_lock);
+  }
+}
+
+void stupid_timeout() {
+  if (!mutex_lock_with_timeout(global_lock)) {
+    mutex_unlock(global_lock);
+  }
+}
+
+void reversal() {
+  mutex_lock(global_lock);
+  mutex_lock(global_lock2);
+
+  mutex_unlock(global_lock);
+  mutex_unlock(global_lock2);
+}
+
+
+// Trying to repro the false positives unsuccessfully...
+extern bool decision();
+
+inline void __attribute__((always_inline))  locker() {
+  mutex_lock(global_lock);
+}
+
+inline void __attribute__((always_inline)) unlocker() {
+  mutex_unlock(global_lock);
+}
+
+static inline void __attribute__((always_inline)) lock_wrap() {
+  locker();
+  if (decision()) {
+    unlocker();
+  }
+}
+
+static inline void __attribute__((always_inline)) unlock_wrap() {
+  unlocker();
+}
+
+void lockme() {
+  lock_wrap();
+  unlock_wrap();
+}