danger::AutoCxPusher::AutoCxPusher(JSContext* cx, bool allowNull)
{
MOZ_ASSERT_IF(!allowNull, cx);
// Hold a strong ref to the nsIScriptContext, if any. This ensures that we
// only destroy the mContext of an nsJSContext when it is not on the cx stack
// (and therefore not in use). See nsJSContext::DestroyJSContext().
if (cx)
mScx = GetScriptContextFromJSContext(cx);
XPCJSContextStack *stack = XPCJSRuntime::Get()->GetJSContextStack();
if (!stack->Push(cx)) {
MOZ_CRASH();
}
mStackDepthAfterPush = stack->Count();
#ifdef DEBUG
mPushedContext = cx;
mCompartmentDepthOnEntry = cx ? js::GetEnterCompartmentDepth(cx) : 0;
#endif
// Enter a request and a compartment for the duration that the cx is on the
// stack if non-null.
if (cx) {
mAutoRequest.emplace(cx);
}
}
AutoCxPusher::AutoCxPusher(JSContext* cx, bool allowNull)
{
MOZ_ASSERT_IF(!allowNull, cx);
// Hold a strong ref to the nsIScriptContext, if any. This ensures that we
// only destroy the mContext of an nsJSContext when it is not on the cx stack
// (and therefore not in use). See nsJSContext::DestroyJSContext().
if (cx)
mScx = GetScriptContextFromJSContext(cx);
XPCJSContextStack *stack = XPCJSRuntime::Get()->GetJSContextStack();
if (!stack->Push(cx)) {
MOZ_CRASH();
}
mStackDepthAfterPush = stack->Count();
#ifdef DEBUG
mPushedContext = cx;
mCompartmentDepthOnEntry = cx ? js::GetEnterCompartmentDepth(cx) : 0;
#endif
// Enter a request and a compartment for the duration that the cx is on the
// stack if non-null.
if (cx) {
mAutoRequest.construct(cx);
// DOM JSContexts don't store their default compartment object on the cx.
JSObject *compartmentObject = mScx ? mScx->GetWindowProxy()
: js::DefaultObjectForContextOrNull(cx);
if (compartmentObject)
mAutoCompartment.construct(cx, compartmentObject);
}
}
