[inspector] added flag for injected-script-source debugging

With flag we can debug injected-script-source in inspector-test or from DevTools frontend as regular user code. We need this when working on new features or debugging issues, it's for internal purpose only and doesn't provide any benefits for end users.

Flag: --expose-inspector-scripts

BUG=none
R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2767873002
Cr-Commit-Position: refs/heads/master@{#44039}

src/api.cc

@@ -9465,7 +9465,9 @@ MaybeLocal<UnboundScript> debug::CompileInspectorScript(Isolate* v8_isolate,
     result = i::Compiler::GetSharedFunctionInfoForScript(
         str, i::Handle<i::Object>(), 0, 0, origin_options,
         i::Handle<i::Object>(), isolate->native_context(), NULL, &script_data,
-        ScriptCompiler::kNoCompileOptions, i::INSPECTOR_CODE);
+        ScriptCompiler::kNoCompileOptions,
+        i::FLAG_expose_inspector_scripts ? i::NOT_NATIVES_CODE
+                                         : i::INSPECTOR_CODE);
     has_pending_exception = result.is_null();
     RETURN_ON_FAILED_EXECUTION(UnboundScript);
   }

src/flag-definitions.h

@@ -851,6 +851,10 @@ DEFINE_BOOL(
     "print debug messages for side-effect-free debug-evaluate for testing")
 DEFINE_BOOL(hard_abort, true, "abort by crashing")
 
+// inspector
+DEFINE_BOOL(expose_inspector_scripts, false,
+            "expose injected-script-source.js for debugging")
+
 // execution.cc
 DEFINE_INT(stack_size, V8_DEFAULT_STACK_SIZE_KB,
            "default size of stack region v8 is allowed to use (in kBytes)")

test/inspector/debugger/stepping-ignores-injected-script-expected.txt

+InjectedSciptSource was not reached

test/inspector/debugger/stepping-ignores-injected-script.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+Protocol.Debugger.onPaused(message => {
+  let url = InspectorTest._scriptMap.get(message.params.callFrames[0].location.scriptId).url;
+  if (url !== 'test.js') {
+    InspectorTest.log('InjectedSciptSource on stack.');
+    InspectorTest.completeTest();
+  }
+  Protocol.Debugger.stepInto();
+});
+
+InspectorTest.setupScriptMap();
+Protocol.Debugger.enable();
+Protocol.Debugger.pause();
+Protocol.Runtime.evaluate({expression: 'console.log(42)//# sourceURL=test.js'})
+  .then(() => InspectorTest.log('InjectedSciptSource was not reached'))
+  .then(InspectorTest.completeTest);

test/inspector/debugger/stepping-with-exposed-injected-script-expected.txt

+InjectedSciptSource on stack.

test/inspector/debugger/stepping-with-exposed-injected-script.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// Flags: --expose-inspector-scripts
+
+Protocol.Debugger.onPaused(message => {
+  let url = InspectorTest._scriptMap.get(message.params.callFrames[0].location.scriptId).url;
+  if (url !== 'test.js') {
+    InspectorTest.log('InjectedSciptSource on stack.');
+    InspectorTest.completeTest();
+  }
+  Protocol.Debugger.stepInto();
+});
+
+InspectorTest.setupScriptMap();
+Protocol.Debugger.enable();
+Protocol.Debugger.pause();
+Protocol.Runtime.evaluate({expression: 'console.log(42)//# sourceURL=test.js'})
+  .then(() => InspectorTest.log('InjectedSciptSource was not reached'))
+  .then(InspectorTest.completeTest);