1 files changed, 102 insertions, 0 deletions
diff --git a/third_party/dav1d/tests/libfuzzer/alloc_fail.c b/third_party/dav1d/tests/libfuzzer/alloc_fail.c
new file mode 100644
index 0000000000..ddd1dd71ab
--- /dev/null
+++ b/third_party/dav1d/tests/libfuzzer/alloc_fail.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright © 2018, VideoLAN and dav1d authors
+ * Copyright © 2018, Janne Grunau
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <pthread.h>
+
+#include "alloc_fail.h"
+
+static int fail_probability;
+
+void dav1d_setup_alloc_fail(unsigned seed, unsigned probability) {
+    srand(seed);
+
+    while (probability >= RAND_MAX)
+        probability >>= 1;
+
+    fail_probability = probability;
+}
+
+void * __wrap_malloc(size_t);
+
+void * __wrap_malloc(size_t sz) {
+    if (rand() < fail_probability)
+        return NULL;
+    return malloc(sz);
+}
+
+#if defined(HAVE_POSIX_MEMALIGN)
+int __wrap_posix_memalign(void **memptr, size_t alignment, size_t size);
+
+int __wrap_posix_memalign(void **memptr, size_t alignment, size_t size) {
+    if (rand() < fail_probability)
+        return ENOMEM;
+    return posix_memalign(memptr, alignment, size);
+}
+#else
+#error "HAVE_POSIX_MEMALIGN required"
+#endif
+
+int __wrap_pthread_create(pthread_t *, const pthread_attr_t *,
+                          void *(*) (void *), void *);
+
+int __wrap_pthread_create(pthread_t *thread, const pthread_attr_t *attr,
+                          void *(*start_routine) (void *), void *arg)
+{
+    if (rand() < (fail_probability + RAND_MAX/16))
+        return EAGAIN;
+
+    return pthread_create(thread, attr, start_routine, arg);
+}
+
+int __wrap_pthread_mutex_init(pthread_mutex_t *,
+                              const pthread_mutexattr_t *);
+
+int __wrap_pthread_mutex_init(pthread_mutex_t *restrict mutex,
+                              const pthread_mutexattr_t *restrict attr)
+{
+    if (rand() < (fail_probability + RAND_MAX/8))
+        return ENOMEM;
+
+    return pthread_mutex_init(mutex, attr);
+}
+
+int __wrap_pthread_cond_init(pthread_cond_t *,
+                             const pthread_condattr_t *);
+
+int __wrap_pthread_cond_init(pthread_cond_t *restrict cond,
+                             const pthread_condattr_t *restrict attr)
+{
+    if (rand() < (fail_probability + RAND_MAX/16))
+        return ENOMEM;
+
+    return pthread_cond_init(cond, attr);
+}