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-rw-r--r--js/src/jsapi-tests/testSharedImmutableStringsCache.cpp80
1 files changed, 80 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testSharedImmutableStringsCache.cpp b/js/src/jsapi-tests/testSharedImmutableStringsCache.cpp
new file mode 100644
index 000000000..421d9f8f9
--- /dev/null
+++ b/js/src/jsapi-tests/testSharedImmutableStringsCache.cpp
@@ -0,0 +1,80 @@
+/* -*- 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 "mozilla/IntegerRange.h"
+
+#include "js/Vector.h"
+#include "jsapi-tests/tests.h"
+#include "threading/Thread.h"
+#include "vm/SharedImmutableStringsCache.h"
+
+const int NUM_THREADS = 256;
+const int NUM_ITERATIONS = 256;
+
+const int NUM_STRINGS = 4;
+const char16_t *const STRINGS[NUM_STRINGS] = {
+ u"uno",
+ u"dos",
+ u"tres",
+ u"quattro"
+};
+
+struct CacheAndIndex
+{
+ js::SharedImmutableStringsCache* cache;
+ int index;
+
+ CacheAndIndex(js::SharedImmutableStringsCache* cache, int index)
+ : cache(cache)
+ , index(index)
+ { }
+};
+
+static void
+getString(CacheAndIndex* cacheAndIndex)
+{
+ for (int i = 0; i < NUM_ITERATIONS; i++) {
+ auto str = STRINGS[cacheAndIndex->index % NUM_STRINGS];
+
+ auto dupe = js::DuplicateString(str);
+ MOZ_RELEASE_ASSERT(dupe);
+
+ auto deduped = cacheAndIndex->cache->getOrCreate(mozilla::Move(dupe), js_strlen(str));
+ MOZ_RELEASE_ASSERT(deduped.isSome());
+ MOZ_RELEASE_ASSERT(js_strcmp(str, deduped->chars()) == 0);
+
+ {
+ auto cloned = deduped->clone();
+ // We should be de-duplicating and giving back the same string.
+ MOZ_RELEASE_ASSERT(deduped->chars() == cloned.chars());
+ }
+ }
+
+ js_delete(cacheAndIndex);
+}
+
+BEGIN_TEST(testSharedImmutableStringsCache)
+{
+ auto maybeCache = js::SharedImmutableStringsCache::Create();
+ CHECK(maybeCache.isSome());
+ auto& cache = *maybeCache;
+
+ js::Vector<js::Thread> threads(cx);
+ CHECK(threads.reserve(NUM_THREADS));
+
+ for (auto i : mozilla::MakeRange(NUM_THREADS)) {
+ auto cacheAndIndex = js_new<CacheAndIndex>(&cache, i);
+ CHECK(cacheAndIndex);
+ threads.infallibleEmplaceBack();
+ CHECK(threads.back().init(getString, cacheAndIndex));
+ }
+
+ for (auto& thread : threads)
+ thread.join();
+
+ return true;
+}
+END_TEST(testSharedImmutableStringsCache)