db4b7e7598
Bug: chromium:845409 Change-Id: I377d6f9d26a193f7fd829f7b74f9fdabc1337dc0 Reviewed-on: https://chromium-review.googlesource.com/1089053 Commit-Queue: Rodrigo Bruno <rfbpb@google.com> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Cr-Commit-Position: refs/heads/master@{#53580}
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <cmath>
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#include <iostream>
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#include <limits>
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#include "src/objects.h"
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#include "src/objects-inl.h"
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#include "src/handles.h"
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#include "src/handles-inl.h"
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#include "src/heap/heap.h"
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#include "test/unittests/test-utils.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace v8 {
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namespace internal {
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typedef TestWithIsolate HeapTest;
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TEST(Heap, SemiSpaceSize) {
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const size_t KB = static_cast<size_t>(i::KB);
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const size_t MB = static_cast<size_t>(i::MB);
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const size_t pm = i::Heap::kPointerMultiplier;
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ASSERT_EQ(1u * pm * MB / 2, i::Heap::ComputeMaxSemiSpaceSize(0u) * KB);
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ASSERT_EQ(1u * pm * MB / 2, i::Heap::ComputeMaxSemiSpaceSize(512u * MB) * KB);
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ASSERT_EQ(2u * pm * MB, i::Heap::ComputeMaxSemiSpaceSize(1024u * MB) * KB);
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ASSERT_EQ(5u * pm * MB, i::Heap::ComputeMaxSemiSpaceSize(2024u * MB) * KB);
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ASSERT_EQ(8u * pm * MB, i::Heap::ComputeMaxSemiSpaceSize(4095u * MB) * KB);
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}
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TEST_F(HeapTest, ASLR) {
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#if V8_TARGET_ARCH_X64
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#if V8_OS_MACOSX
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Heap* heap = i_isolate()->heap();
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std::set<void*> hints;
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for (int i = 0; i < 1000; i++) {
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hints.insert(heap->GetRandomMmapAddr());
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}
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if (hints.size() == 1) {
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EXPECT_TRUE((*hints.begin()) == nullptr);
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EXPECT_TRUE(i::GetRandomMmapAddr() == nullptr);
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} else {
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// It is unlikely that 1000 random samples will collide to less then 500
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// values.
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EXPECT_GT(hints.size(), 500u);
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const uintptr_t kRegionMask = 0xFFFFFFFFu;
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void* first = *hints.begin();
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for (void* hint : hints) {
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uintptr_t diff = reinterpret_cast<uintptr_t>(first) ^
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reinterpret_cast<uintptr_t>(hint);
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EXPECT_LE(diff, kRegionMask);
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}
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}
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#endif // V8_OS_MACOSX
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#endif // V8_TARGET_ARCH_X64
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}
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} // namespace internal
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} // namespace v8
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