Improve JS bindings for hooking functions

frida_mode/test/js/main.js

@@ -0,0 +1,44 @@
+Afl.print('******************');
+Afl.print('* AFL FRIDA MODE *');
+Afl.print('******************');
+Afl.print('');
+
+Afl.print(`PID: ${Process.id}`);
+
+const name = Process.enumerateModules()[0].name;
+Afl.print(`Name: ${name}`);
+
+new ModuleMap().values().forEach(m => {
+    Afl.print(`${m.base}-${m.base.add(m.size)} ${m.name}`);
+});
+
+const main = DebugSymbol.fromName('main').address;
+Afl.print(`main: ${main}`);
+
+const LLVMFuzzerTestOneInput = DebugSymbol.fromName('LLVMFuzzerTestOneInput').address;
+Afl.print(`LLVMFuzzerTestOneInput: ${LLVMFuzzerTestOneInput}`);
+
+const cm = new CModule(`
+
+    extern unsigned char * __afl_fuzz_ptr;
+    extern unsigned int * __afl_fuzz_len;
+    extern void LLVMFuzzerTestOneInput(char *buf, int len);
+
+    int main(int argc, char **argv)  {
+
+      LLVMFuzzerTestOneInput(__afl_fuzz_ptr, *__afl_fuzz_len);
+
+    }
+    `,
+    {
+        LLVMFuzzerTestOneInput: LLVMFuzzerTestOneInput,
+        __afl_fuzz_ptr: Afl.getAflFuzzPtr(),
+        __afl_fuzz_len: Afl.getAflFuzzLen()
+    });
+
+Afl.setEntryPoint(cm.main);
+Afl.setPersistentAddress(cm.main);
+Afl.setInMemoryFuzzing();
+Afl.setJsMainHook(cm.main);
+Afl.print("done");
+Afl.done();