Add name inference for anonymous functions to facilitate debugging and profiling of JS code.

test/cctest/test-func-name-inference.cc

+// Copyright 2007-2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * 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.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// 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 "v8.h"
+
+#include "api.h"
+#include "runtime.h"
+#include "cctest.h"
+
+
+using ::v8::internal::Handle;
+using ::v8::internal::JSFunction;
+using ::v8::internal::Object;
+using ::v8::internal::Script;
+using ::v8::internal::SharedFunctionInfo;
+using ::v8::internal::String;
+
+namespace i = ::v8::internal;
+
+
+static v8::Persistent<v8::Context> env;
+
+
+static void InitializeVM() {
+  if (env.IsEmpty()) {
+    v8::HandleScope scope;
+    env = v8::Context::New();
+  }
+  v8::HandleScope scope;
+  env->Enter();
+}
+
+
+static void CheckFunctionName(v8::Handle<v8::Script> script,
+                              const char* func_pos_src,
+                              const char* ref_inferred_name) {
+  // Get script source.
+  Handle<JSFunction> fun = v8::Utils::OpenHandle(*script);
+  Handle<Script> i_script(Script::cast(fun->shared()->script()));
+  CHECK(i_script->source()->IsString());
+  Handle<String> script_src(String::cast(i_script->source()));
+
+  // Find the position of a given func source substring in the source.
+  Handle<String> func_pos_str =
+      i::Factory::NewStringFromAscii(i::CStrVector(func_pos_src));
+  int func_pos = i::Runtime::StringMatch(script_src, func_pos_str, 0);
+  CHECK_NE(0, func_pos);
+
+  // Obtain SharedFunctionInfo for the function.
+  Object* shared_func_info_ptr =
+      i::Runtime::FindSharedFunctionInfoInScript(i_script, func_pos);
+  CHECK(shared_func_info_ptr != i::Heap::undefined_value());
+  Handle<SharedFunctionInfo> shared_func_info(
+      SharedFunctionInfo::cast(shared_func_info_ptr));
+
+  // Verify inferred function name.
+  i::SmartPointer<char> inferred_name =
+      shared_func_info->inferred_name()->ToCString();
+  CHECK_EQ(ref_inferred_name, *inferred_name);
+}
+
+
+static v8::Handle<v8::Script> Compile(const char* src) {
+  return v8::Script::Compile(v8::String::New(src));
+}
+
+
+TEST(GlobalProperty) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "fun1 = function() { return 1; }\n"
+      "fun2 = function() { return 2; }\n");
+  CheckFunctionName(script, "return 1", "fun1");
+  CheckFunctionName(script, "return 2", "fun2");
+}
+
+
+TEST(GlobalVar) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "var fun1 = function() { return 1; }\n"
+      "var fun2 = function() { return 2; }\n");
+  CheckFunctionName(script, "return 1", "fun1");
+  CheckFunctionName(script, "return 2", "fun2");
+}
+
+
+TEST(LocalVar) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "function outer() {\n"
+      "  var fun1 = function() { return 1; }\n"
+      "  var fun2 = function() { return 2; }\n"
+      "}");
+  CheckFunctionName(script, "return 1", "fun1");
+  CheckFunctionName(script, "return 2", "fun2");
+}
+
+
+TEST(InConstructor) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "function MyClass() {\n"
+      "  this.method1 = function() { return 1; }\n"
+      "  this.method2 = function() { return 2; }\n"
+      "}");
+  CheckFunctionName(script, "return 1", "MyClass.method1");
+  CheckFunctionName(script, "return 2", "MyClass.method2");
+}
+
+
+TEST(Factory) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "function createMyObj() {\n"
+      "  var obj = {};\n"
+      "  obj.method1 = function() { return 1; }\n"
+      "  obj.method2 = function() { return 2; }\n"
+      "  return obj;\n"
+      "}");
+  CheckFunctionName(script, "return 1", "obj.method1");
+  CheckFunctionName(script, "return 2", "obj.method2");
+}
+
+
+TEST(Static) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "function MyClass() {}\n"
+      "MyClass.static1 = function() { return 1; }\n"
+      "MyClass.static2 = function() { return 2; }\n"
+      "MyClass.MyInnerClass = {}\n"
+      "MyClass.MyInnerClass.static3 = function() { return 3; }\n"
+      "MyClass.MyInnerClass.static4 = function() { return 4; }");
+  CheckFunctionName(script, "return 1", "MyClass.static1");
+  CheckFunctionName(script, "return 2", "MyClass.static2");
+  CheckFunctionName(script, "return 3", "MyClass.MyInnerClass.static3");
+  CheckFunctionName(script, "return 4", "MyClass.MyInnerClass.static4");
+}
+
+
+TEST(Prototype) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "function MyClass() {}\n"
+      "MyClass.prototype.method1 = function() { return 1; }\n"
+      "MyClass.prototype.method2 = function() { return 2; }\n"
+      "MyClass.MyInnerClass = function() {}\n"
+      "MyClass.MyInnerClass.prototype.method3 = function() { return 3; }\n"
+      "MyClass.MyInnerClass.prototype.method4 = function() { return 4; }");
+  CheckFunctionName(script, "return 1", "MyClass.method1");
+  CheckFunctionName(script, "return 2", "MyClass.method2");
+  CheckFunctionName(script, "return 3", "MyClass.MyInnerClass.method3");
+  CheckFunctionName(script, "return 4", "MyClass.MyInnerClass.method4");
+}
+
+
+TEST(ObjectLiteral) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "function MyClass() {}\n"
+      "MyClass.prototype = {\n"
+      "  method1: function() { return 1; },\n"
+      "  method2: function() { return 2; } }");
+  CheckFunctionName(script, "return 1", "MyClass.method1");
+  CheckFunctionName(script, "return 2", "MyClass.method2");
+}
+
+
+TEST(AsParameter) {
+  InitializeVM();
+  v8::HandleScope scope;
+
+  v8::Handle<v8::Script> script = Compile(
+      "function f1(a) { return a(); }\n"
+      "function f2(a, b) { return a() + b(); }\n"
+      "var result1 = f1(function() { return 1; })\n"
+      "var result2 = f2(function() { return 2; }, function() { return 3; })");
+  // Can't infer names here.
+  CheckFunctionName(script, "return 1", "");
+  CheckFunctionName(script, "return 2", "");
+  CheckFunctionName(script, "return 3", "");
+}