void
GlobalObject::clear(JSContext *cx)
{
for (int key = JSProto_Null; key < JSProto_LIMIT * 3; key++)
setSlot(key, UndefinedValue());
/* Clear regexp statics. */
getRegExpStatics()->clear();
/* Clear the runtime-codegen-enabled cache. */
setSlot(RUNTIME_CODEGEN_ENABLED, UndefinedValue());
/*
* Clear all slots storing values in case throwing trying to execute a
* script for this global must reinitialize standard classes. See
* bug 470150.
*/
setSlot(BOOLEAN_VALUEOF, UndefinedValue());
setSlot(EVAL, UndefinedValue());
setSlot(CREATE_DATAVIEW_FOR_THIS, UndefinedValue());
setSlot(THROWTYPEERROR, UndefinedValue());
setSlot(INTRINSICS, UndefinedValue());
setSlot(PROTO_GETTER, UndefinedValue());
/*
* Mark global as cleared. If we try to execute any compile-and-go
* scripts from here on, we will throw.
*/
int32_t flags = getSlot(FLAGS).toInt32();
flags |= FLAGS_CLEARED;
setSlot(FLAGS, Int32Value(flags));
/*
* Reset the new object cache in the compartment, which assumes that
* prototypes cached on the global object are immutable.
*/
cx->runtime->newObjectCache.purge();
#ifdef JS_METHODJIT
/*
* Destroy compiled code for any scripts parented to this global. Call ICs
* can directly call scripts which have associated JIT code, and do so
* without checking whether the script's global has been cleared.
*/
for (gc::CellIter i(cx->compartment, gc::FINALIZE_SCRIPT); !i.done(); i.next()) {
JSScript *script = i.get<JSScript>();
if (script->compileAndGo && script->hasMJITInfo() && script->hasClearedGlobal()) {
mjit::Recompiler::clearStackReferences(cx->runtime->defaultFreeOp(), script);
mjit::ReleaseScriptCode(cx->runtime->defaultFreeOp(), script);
}
}
#endif
}
