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GCObjectIterationTest.cpp

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GCObjectIterationTest.cpp

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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#include "EmptyCell.h"
#include "TestHelpers.h"
#include "hermes/Support/Algorithms.h"
#include "hermes/VM/BuildMetadata.h"
#include "hermes/VM/GC.h"
#include "hermes/VM/HeapAlign.h"
#include "gtest/gtest.h"
using namespace hermes::vm;
namespace {
TEST(GCObjectIterationTest, ForAllObjsGetsAllObjects) {
auto runtime = DummyRuntime::create(kTestGCConfigLarge);
DummyRuntime &rt = *runtime;
auto &gc = rt.getHeap();
GCScope scope{&rt};
// For Hades and GenGC, ensure that we iterate across multiple segments.
constexpr size_t kLargeSize =
#ifdef HERMESVM_GC_MALLOC
1024 * 1024
#else
heapAlignSize((GC::maxAllocationSize() / 3) * 2)
#endif
;
using LargeCell = EmptyCell<kLargeSize>;
// Divide by 8 bytes per HermesValue to get elements.
runtime->makeHandle(LargeCell::create(rt));
runtime->makeHandle(LargeCell::create(rt));
// Should move both to the old gen, in separate segments.
rt.collect();
// A smaller size, in the young generation.
constexpr size_t kSmallSize = 80;
using SmallCell = EmptyCell<kSmallSize>;
runtime->makeHandle(SmallCell::create(rt));
size_t num = 0;
size_t sizeSum = 0;
gc.forAllObjs([&num, &sizeSum](GCCell *cell) {
num++;
sizeSum += cell->getAllocatedSize();
});
EXPECT_EQ(3, num);
EXPECT_EQ(2 * kLargeSize + kSmallSize, sizeSum);
}
} // namespace
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