src/bootstrapper.cc - Issue 2108203002: Implement immutable prototype chains

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Unified Diff: src/bootstrapper.cc

Issue 2108203002: Implement immutable prototype chains (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master

Patch Set: IsImmutableProto Created 4 years, 6 months ago

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Index: src/bootstrapper.cc

diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc

index 0be96ea46c5e6a8cab680bb321b842dfdab3bcd5..2f00067fb3c2270cc6827898063281c647664dec 100644

--- a/src/bootstrapper.cc

+++ b/src/bootstrapper.cc

@@ -599,6 +599,8 @@ Handle<JSFunction> Genesis::CreateEmptyFunction(Isolate* isolate) {

Handle<Map> map = Map::Copy(handle(object_function_prototype->map()),

"EmptyObjectPrototype");

map->set_is_prototype_map(true);

+ // Ban re-setting Object.prototype.__proto__ to prevent Proxy security bug

+ map->set_immutable_proto(true);

object_function_prototype->set_map(*map);

native_context()->set_initial_object_prototype(*object_function_prototype);

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