Stack traces exposed to Javascript should omit extensions.

test/cctest/test-api.cc

 // Copyright 2012 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
@@ skipping 6676 matching lines @@
   const char* extension_names[] = { "simpletest" };
   v8::ExtensionConfiguration extensions(1, extension_names);
   v8::Handle<Context> context =
       Context::New(CcTest::isolate(), &extensions);
   Context::Scope lock(context);
   v8::Handle<Value> result = CompileRun("Foo()");
   CHECK_EQ(result, v8::Integer::New(CcTest::isolate(), 4));
 }
 
 
+static const char* kStackTraceFromExtensionSource =
+  "function foo() {"
+  "  throw new Error();"
+  "}"
+  "function bar() {"
+  "  foo();"
+  "}";
+
+
+TEST(StackTraceInExtension) {
+  v8::HandleScope handle_scope(CcTest::isolate());
+  v8::RegisterExtension(new Extension("stacktracetest",
+                        kStackTraceFromExtensionSource));
+  const char* extension_names[] = { "stacktracetest" };
+  v8::ExtensionConfiguration extensions(1, extension_names);
+  v8::Handle<Context> context =
+      Context::New(CcTest::isolate(), &extensions);
+  Context::Scope lock(context);
+  CompileRun("function user() { bar(); }"
+             "var error;"
+             "try{ user(); } catch (e) { error = e; }");
+  CHECK_EQ(-1, CompileRun("error.stack.indexOf('foo')")->Int32Value());
+  CHECK_EQ(-1, CompileRun("error.stack.indexOf('bar')")->Int32Value());
+  CHECK_NE(-1, CompileRun("error.stack.indexOf('user')")->Int32Value());
+}
+
+
 TEST(NullExtensions) {
   v8::HandleScope handle_scope(CcTest::isolate());
   v8::RegisterExtension(new Extension("nulltest", NULL));
   const char* extension_names[] = { "nulltest" };
   v8::ExtensionConfiguration extensions(1, extension_names);
   v8::Handle<Context> context =
       Context::New(CcTest::isolate(), &extensions);
   Context::Scope lock(context);
   v8::Handle<Value> result = CompileRun("1+3");
   CHECK_EQ(result, v8::Integer::New(CcTest::isolate(), 4));
@@ skipping 16129 matching lines @@
   SourceURLHelper("function foo() {}\n"
                   "//# sourceURL=bar19\".js   \n"
                   "//# sourceMappingURL=bar20\".js \n",
                   NULL, NULL);
 
   // Not too much whitespace.
   SourceURLHelper("function foo() {}\n"
                   "//# sourceURL=  bar21.js   \n"
                   "//# sourceMappingURL=  bar22.js \n", "bar21.js", "bar22.js");
 }