Add the missing fuzz_common.c (bellard#292)

Author: renatahodovan

fuzz/fuzz_common.c

@@ -0,0 +1,62 @@
+/* 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 <string.h>
+
+#include "fuzz/fuzz_common.h"
+
+// handle timeouts from infinite loops
+static int interrupt_handler(JSRuntime *rt, void *opaque)
+{
+    nbinterrupts++;
+    return (nbinterrupts > 100);
+}
+
+void reset_nbinterrupts() {
+    nbinterrupts = 0;
+}
+
+void test_one_input_init(JSRuntime *rt, JSContext *ctx) {
+    // 64 Mo
+    JS_SetMemoryLimit(rt, 0x4000000);
+    // 64 Kb
+    JS_SetMaxStackSize(rt, 0x10000);
+
+    JS_AddIntrinsicBigFloat(ctx);
+    JS_AddIntrinsicBigDecimal(ctx);
+    JS_AddIntrinsicOperators(ctx);
+    JS_EnableBignumExt(ctx, 1);
+    JS_SetModuleLoaderFunc(rt, NULL, js_module_loader, NULL);
+    JS_SetInterruptHandler(JS_GetRuntime(ctx), interrupt_handler, NULL);
+    js_std_add_helpers(ctx, 0, NULL);
+
+    // Load os and std
+    js_std_init_handlers(rt);
+    js_init_module_std(ctx, "std");
+    js_init_module_os(ctx, "os");
+    const char *str = "import * as std from 'std';\n"
+                "import * as os from 'os';\n"
+                "globalThis.std = std;\n"
+                "globalThis.os = os;\n";
+    JSValue std_val = JS_Eval(ctx, str, strlen(str), "<input>", JS_EVAL_TYPE_MODULE | JS_EVAL_FLAG_COMPILE_ONLY);
+    if (!JS_IsException(std_val)) {
+        js_module_set_import_meta(ctx, std_val, 1, 1);
+        std_val = JS_EvalFunction(ctx, std_val);
+    } else {
+        js_std_dump_error(ctx);
+    }
+    std_val = js_std_await(ctx, std_val);
+    JS_FreeValue(ctx, std_val);
+}