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-rw-r--r--devtools/shared/heapsnapshot/tests/gtest/DoesCrossCompartmentBoundaries.cpp67
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diff --git a/devtools/shared/heapsnapshot/tests/gtest/DoesCrossCompartmentBoundaries.cpp b/devtools/shared/heapsnapshot/tests/gtest/DoesCrossCompartmentBoundaries.cpp
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index 0000000000..8c1f3f29de
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+++ b/devtools/shared/heapsnapshot/tests/gtest/DoesCrossCompartmentBoundaries.cpp
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* 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/. */
+
+// Test that heap snapshots cross compartment boundaries when expected.
+
+#include "DevTools.h"
+
+DEF_TEST(DoesCrossCompartmentBoundaries, {
+ // Create a new global to get a new compartment.
+ JS::RealmOptions options;
+ JS::RootedObject newGlobal(
+ cx, JS_NewGlobalObject(cx, getGlobalClass(), nullptr,
+ JS::FireOnNewGlobalHook, options));
+ ASSERT_TRUE(newGlobal);
+ JS::Compartment* newCompartment = nullptr;
+ {
+ JSAutoRealm ar(cx, newGlobal);
+ ASSERT_TRUE(JS::InitRealmStandardClasses(cx));
+ newCompartment = js::GetContextCompartment(cx);
+ }
+ ASSERT_TRUE(newCompartment);
+ ASSERT_NE(newCompartment, compartment);
+
+ // Our set of target compartments is both the old and new compartments.
+ JS::CompartmentSet targetCompartments;
+ ASSERT_TRUE(targetCompartments.put(compartment));
+ ASSERT_TRUE(targetCompartments.put(newCompartment));
+
+ FakeNode nodeA;
+ FakeNode nodeB;
+ FakeNode nodeC;
+ FakeNode nodeD;
+
+ nodeA.compartment = compartment;
+ nodeB.compartment = nullptr;
+ nodeC.compartment = newCompartment;
+ nodeD.compartment = nullptr;
+
+ AddEdge(nodeA, nodeB);
+ AddEdge(nodeA, nodeC);
+ AddEdge(nodeB, nodeD);
+
+ ::testing::NiceMock<MockWriter> writer;
+
+ // Should serialize nodeA, because it is in one of our target compartments.
+ ExpectWriteNode(writer, nodeA);
+
+ // Should serialize nodeB, because it doesn't belong to a compartment and is
+ // therefore assumed to be shared.
+ ExpectWriteNode(writer, nodeB);
+
+ // Should also serialize nodeC, which is in our target compartments, but a
+ // different compartment than A.
+ ExpectWriteNode(writer, nodeC);
+
+ // Should serialize nodeD because it's reachable via B and both nodes B and D
+ // don't belong to a specific compartment.
+ ExpectWriteNode(writer, nodeD);
+
+ JS::AutoCheckCannotGC noGC(cx);
+
+ ASSERT_TRUE(WriteHeapGraph(cx, JS::ubi::Node(&nodeA), writer,
+ /* wantNames = */ false, &targetCompartments,
+ noGC));
+});