Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 184 insertions, 0 deletions

diff --git a/js/src/jsapi-tests/testResolveRecursion.cpp b/js/src/jsapi-tests/testResolveRecursion.cpp
new file mode 100644
index 0000000000..44b5cd35a3
--- /dev/null
+++ b/js/src/jsapi-tests/testResolveRecursion.cpp
@@ -0,0 +1,184 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ */
+/* 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 "js/Object.h"              // JS::GetReservedSlot, JS::SetReservedSlot
+#include "js/PropertyAndElement.h"  // JS_DefineProperty, JS_DefinePropertyById
+#include "jsapi-tests/tests.h"
+
+/*
+ * Test that resolve hook recursion for the same object and property is
+ * prevented.
+ */
+BEGIN_TEST(testResolveRecursion) {
+  static const JSClassOps my_resolve_classOps = {
+      nullptr,     // addProperty
+      nullptr,     // delProperty
+      nullptr,     // enumerate
+      nullptr,     // newEnumerate
+      my_resolve,  // resolve
+      nullptr,     // mayResolve
+      nullptr,     // finalize
+      nullptr,     // call
+      nullptr,     // construct
+      nullptr,     // trace
+  };
+
+  static const JSClass my_resolve_class = {
+      "MyResolve", JSCLASS_HAS_RESERVED_SLOTS(SlotCount), &my_resolve_classOps};
+
+  obj1.init(cx, JS_NewObject(cx, &my_resolve_class));
+  CHECK(obj1);
+  obj2.init(cx, JS_NewObject(cx, &my_resolve_class));
+  CHECK(obj2);
+  JS::SetReservedSlot(obj1, TestSlot, JS::PrivateValue(this));
+  JS::SetReservedSlot(obj2, TestSlot, JS::PrivateValue(this));
+
+  JS::RootedValue obj1Val(cx, JS::ObjectValue(*obj1));
+  JS::RootedValue obj2Val(cx, JS::ObjectValue(*obj2));
+  CHECK(JS_DefineProperty(cx, global, "obj1", obj1Val, 0));
+  CHECK(JS_DefineProperty(cx, global, "obj2", obj2Val, 0));
+
+  resolveEntryCount = 0;
+  resolveExitCount = 0;
+
+  /* Start the essence of the test via invoking the first resolve hook. */
+  JS::RootedValue v(cx);
+  EVAL("obj1.x", &v);
+  CHECK(v.isFalse());
+  CHECK_EQUAL(resolveEntryCount, 4);
+  CHECK_EQUAL(resolveExitCount, 4);
+
+  obj1 = nullptr;
+  obj2 = nullptr;
+  return true;
+}
+
+enum Slots { TestSlot, SlotCount };
+
+JS::PersistentRootedObject obj1;
+JS::PersistentRootedObject obj2;
+int resolveEntryCount;
+int resolveExitCount;
+
+struct AutoIncrCounters {
+  explicit AutoIncrCounters(cls_testResolveRecursion* t) : t(t) {
+    t->resolveEntryCount++;
+  }
+
+  ~AutoIncrCounters() { t->resolveExitCount++; }
+
+  cls_testResolveRecursion* t;
+};
+
+bool doResolve(JS::HandleObject obj, JS::HandleId id, bool* resolvedp) {
+  CHECK_EQUAL(resolveExitCount, 0);
+  AutoIncrCounters incr(this);
+  CHECK(obj == obj1 || obj == obj2);
+
+  CHECK(id.isString());
+
+  JSLinearString* str = JS_EnsureLinearString(cx, id.toString());
+  CHECK(str);
+  JS::RootedValue v(cx);
+  if (JS_LinearStringEqualsLiteral(str, "x")) {
+    if (obj == obj1) {
+      /* First resolve hook invocation. */
+      CHECK_EQUAL(resolveEntryCount, 1);
+      EVAL("obj2.y = true", &v);
+      CHECK(v.isTrue());
+      CHECK(JS_DefinePropertyById(cx, obj, id, JS::FalseHandleValue,
+                                  JSPROP_RESOLVING));
+      *resolvedp = true;
+      return true;
+    }
+    if (obj == obj2) {
+      CHECK_EQUAL(resolveEntryCount, 4);
+      *resolvedp = false;
+      return true;
+    }
+  } else if (JS_LinearStringEqualsLiteral(str, "y")) {
+    if (obj == obj2) {
+      CHECK_EQUAL(resolveEntryCount, 2);
+      CHECK(JS_DefinePropertyById(cx, obj, id, JS::NullHandleValue,
+                                  JSPROP_RESOLVING));
+      EVAL("obj1.x", &v);
+      CHECK(v.isUndefined());
+      EVAL("obj1.y", &v);
+      CHECK(v.isInt32(0));
+      *resolvedp = true;
+      return true;
+    }
+    if (obj == obj1) {
+      CHECK_EQUAL(resolveEntryCount, 3);
+      EVAL("obj1.x", &v);
+      CHECK(v.isUndefined());
+      EVAL("obj1.y", &v);
+      CHECK(v.isUndefined());
+      EVAL("obj2.y", &v);
+      CHECK(v.isNull());
+      EVAL("obj2.x", &v);
+      CHECK(v.isUndefined());
+      EVAL("obj1.y = 0", &v);
+      CHECK(v.isInt32(0));
+      *resolvedp = true;
+      return true;
+    }
+  }
+  CHECK(false);
+  return false;
+}
+
+static bool my_resolve(JSContext* cx, JS::HandleObject obj, JS::HandleId id,
+                       bool* resolvedp) {
+  void* p = JS::GetReservedSlot(obj, TestSlot).toPrivate();
+  return static_cast<cls_testResolveRecursion*>(p)->doResolve(obj, id,
+                                                              resolvedp);
+}
+END_TEST(testResolveRecursion)
+
+/*
+ * Test that JS_InitStandardClasses does not cause resolve hooks to be called.
+ *
+ * (XPConnect apparently does have global classes, such as the one created by
+ * nsMessageManagerScriptExecutor::InitChildGlobalInternal(), that have resolve
+ * hooks which can call back into JS, and on which JS_InitStandardClasses is
+ * called. Calling back into JS in the middle of resolving `undefined` is bad.)
+ */
+BEGIN_TEST(testResolveRecursion_InitStandardClasses) {
+  CHECK(JS::InitRealmStandardClasses(cx));
+  return true;
+}
+
+const JSClass* getGlobalClass() override {
+  static const JSClassOps myGlobalClassOps = {
+      nullptr,                   // addProperty
+      nullptr,                   // delProperty
+      nullptr,                   // enumerate
+      nullptr,                   // newEnumerate
+      my_resolve,                // resolve
+      nullptr,                   // mayResolve
+      nullptr,                   // finalize
+      nullptr,                   // call
+      nullptr,                   // construct
+      JS_GlobalObjectTraceHook,  // trace
+  };
+
+  static const JSClass myGlobalClass = {
+      "testResolveRecursion_InitStandardClasses_myGlobalClass",
+      JSCLASS_GLOBAL_FLAGS, &myGlobalClassOps};
+
+  return &myGlobalClass;
+}
+
+static bool my_resolve(JSContext* cx, JS::HandleObject obj, JS::HandleId id,
+                       bool* resolvedp) {
+  MOZ_ASSERT_UNREACHABLE(
+      "resolve hook should not be called from InitStandardClasses");
+  JS_ReportErrorASCII(cx, "FAIL");
+  return false;
+}
+END_TEST(testResolveRecursion_InitStandardClasses)