Add m-esr52 at 52.6.0

1 files changed, 175 insertions, 0 deletions

diff --git a/js/src/proxy/DeadObjectProxy.cpp b/js/src/proxy/DeadObjectProxy.cpp
new file mode 100644
index 000000000..00ca034f3
--- /dev/null
+++ b/js/src/proxy/DeadObjectProxy.cpp
@@ -0,0 +1,175 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "proxy/DeadObjectProxy.h"
+
+#include "jsapi.h"
+#include "jsfun.h" // XXXefaust Bug 1064662
+
+#include "proxy/ScriptedProxyHandler.h"
+#include "vm/ProxyObject.h"
+
+using namespace js;
+using namespace js::gc;
+
+static void
+ReportDead(JSContext *cx)
+{
+    JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_DEAD_OBJECT);
+}
+
+bool
+DeadObjectProxy::getOwnPropertyDescriptor(JSContext* cx, HandleObject wrapper, HandleId id,
+                                          MutableHandle<PropertyDescriptor> desc) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::defineProperty(JSContext* cx, HandleObject wrapper, HandleId id,
+                                Handle<PropertyDescriptor> desc,
+                                ObjectOpResult& result) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::ownPropertyKeys(JSContext* cx, HandleObject wrapper,
+                                 AutoIdVector& props) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::delete_(JSContext* cx, HandleObject wrapper, HandleId id,
+                         ObjectOpResult& result) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::getPrototype(JSContext* cx, HandleObject proxy, MutableHandleObject protop) const
+{
+    protop.set(nullptr);
+    return true;
+}
+
+bool
+DeadObjectProxy::getPrototypeIfOrdinary(JSContext* cx, HandleObject proxy, bool* isOrdinary,
+                                        MutableHandleObject protop) const
+{
+    *isOrdinary = false;
+    return true;
+}
+
+bool
+DeadObjectProxy::preventExtensions(JSContext* cx, HandleObject proxy, ObjectOpResult& result) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::isExtensible(JSContext* cx, HandleObject proxy, bool* extensible) const
+{
+    // This is kind of meaningless, but dead-object semantics aside,
+    // [[Extensible]] always being true is consistent with other proxy types.
+    *extensible = true;
+    return true;
+}
+
+bool
+DeadObjectProxy::call(JSContext* cx, HandleObject wrapper, const CallArgs& args) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::construct(JSContext* cx, HandleObject wrapper, const CallArgs& args) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::nativeCall(JSContext* cx, IsAcceptableThis test, NativeImpl impl,
+                            const CallArgs& args) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::hasInstance(JSContext* cx, HandleObject proxy, MutableHandleValue v,
+                             bool* bp) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::getBuiltinClass(JSContext* cx, HandleObject proxy, ESClass* cls) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::isArray(JSContext* cx, HandleObject obj, JS::IsArrayAnswer* answer) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+const char*
+DeadObjectProxy::className(JSContext* cx, HandleObject wrapper) const
+{
+    return "DeadObject";
+}
+
+JSString*
+DeadObjectProxy::fun_toString(JSContext* cx, HandleObject proxy, unsigned indent) const
+{
+    ReportDead(cx);
+    return nullptr;
+}
+
+bool
+DeadObjectProxy::regexp_toShared(JSContext* cx, HandleObject proxy, RegExpGuard* g) const
+{
+    ReportDead(cx);
+    return false;
+}
+
+bool
+DeadObjectProxy::isCallable(JSObject* obj) const
+{
+    static const uint32_t slot = ScriptedProxyHandler::IS_CALLCONSTRUCT_EXTRA;
+    uint32_t callConstruct = obj->as<ProxyObject>().extra(slot).toPrivateUint32();
+    return !!(callConstruct & ScriptedProxyHandler::IS_CALLABLE);
+}
+
+bool
+DeadObjectProxy::isConstructor(JSObject* obj) const
+{
+    static const uint32_t slot = ScriptedProxyHandler::IS_CALLCONSTRUCT_EXTRA;
+    uint32_t callConstruct = obj->as<ProxyObject>().extra(slot).toPrivateUint32();
+    return !!(callConstruct & ScriptedProxyHandler::IS_CONSTRUCTOR);
+}
+
+const char DeadObjectProxy::family = 0;
+const DeadObjectProxy DeadObjectProxy::singleton;
+
+bool
+js::IsDeadProxyObject(JSObject* obj)
+{
+    return IsDerivedProxyObject(obj, &DeadObjectProxy::singleton);
+}