1 files changed, 73 insertions, 0 deletions
diff --git a/projects/quickjs/fuzz_eval.c b/projects/quickjs/fuzz_eval.c
new file mode 100644
index 000000000..6ba443f4d
--- /dev/null
+++ b/projects/quickjs/fuzz_eval.c
@@ -0,0 +1,73 @@
+/* Copyright 2020 Google Inc.
+ 
+ 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 "quickjs-libc.h"
+
+#include <stdint.h>
+#include <stdio.h>
+
+static int initialized = 0;
+JSRuntime *rt;
+JSContext *ctx;
+static int nbinterrupts = 0;
+
+// handle timeouts from infinite loops
+static int interrupt_handler(JSRuntime *rt, void *opaque)
+{
+    nbinterrupts++;
+    return (nbinterrupts > 100);
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+    if (initialized == 0) {
+        rt = JS_NewRuntime();
+        // 64 Mo
+        JS_SetMemoryLimit(rt, 0x4000000);
+        //TODO JS_SetMaxStackSize ?
+        ctx = JS_NewContextRaw(rt);
+        JS_SetModuleLoaderFunc(rt, NULL, js_module_loader, NULL);
+        JS_AddIntrinsicBaseObjects(ctx);
+        JS_AddIntrinsicDate(ctx);
+        JS_AddIntrinsicEval(ctx);
+        JS_AddIntrinsicStringNormalize(ctx);
+        JS_AddIntrinsicRegExp(ctx);
+        JS_AddIntrinsicJSON(ctx);
+        JS_AddIntrinsicProxy(ctx);
+        JS_AddIntrinsicMapSet(ctx);
+        JS_AddIntrinsicTypedArrays(ctx);
+        JS_AddIntrinsicPromise(ctx);
+        JS_AddIntrinsicBigInt(ctx);
+        JS_SetInterruptHandler(JS_GetRuntime(ctx), interrupt_handler, NULL);
+        js_std_add_helpers(ctx, 0, NULL);
+        initialized = 1;
+    }
+
+    if (Size > 0) {
+        //is it more efficient to malloc(Size+1) and memcpy ?
+        if (Data[Size-1] != 0) {
+            return 0;
+        }
+        nbinterrupts = 0;
+        //the final 0 does not count (as in strlen)
+        JSValue val = JS_Eval(ctx, (const char *)Data, Size-1, "<none>", JS_EVAL_TYPE_GLOBAL);
+        //TODO targets with JS_ParseJSON, JS_ReadObject
+        if (!JS_IsException(val)) {
+            js_std_loop(ctx);
+            JS_FreeValue(ctx, val);
+        }
+    }
+
+    return 0;
+}