Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/fuzz/fuzz.h b/src/fuzz/fuzz.h
new file mode 100644
index 0000000..698ba42
--- /dev/null
+++ b/src/fuzz/fuzz.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "env-util.h"
+#include "fileio.h"
+
+/* The entry point into the fuzzer */
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+static inline FILE* data_to_file(const uint8_t *data, size_t size) {
+        if (size == 0)
+                return fopen("/dev/null", "re");
+        else
+                return fmemopen_unlocked((char*) data, size, "r");
+}
+
+/* Check if we are within the specified size range.
+ * The upper limit is ignored if FUZZ_USE_SIZE_LIMIT is unset.
+ */
+static inline bool outside_size_range(size_t size, size_t lower, size_t upper) {
+        if (size < lower)
+                return true;
+        if (size > upper)
+                return FUZZ_USE_SIZE_LIMIT;
+        return false;
+}
+
+static inline void fuzz_setup_logging(void) {
+        /* We don't want to fill the logs and slow down stuff when running
+         * in a fuzzing mode, so disable most of the logging. */
+        log_set_max_level(LOG_CRIT);
+        log_parse_environment();
+        log_open();
+}
+
+/* Force value to not be optimized away. */
+#define DO_NOT_OPTIMIZE(value) ({ asm volatile("" : : "g"(value) : "memory"); })