Line data    Source code

       1             : // Copyright 2014 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include <cmath>
       6             : #include <iostream>
       7             : #include <limits>
       8             : 
       9             : #include "src/handles-inl.h"
      10             : #include "src/heap/heap.h"
      11             : #include "src/heap/spaces-inl.h"
      12             : #include "src/objects-inl.h"
      13             : #include "test/unittests/test-utils.h"
      14             : #include "testing/gtest/include/gtest/gtest.h"
      15             : 
      16             : namespace v8 {
      17             : namespace internal {
      18             : 
      19             : using HeapTest = TestWithIsolate;
      20             : using HeapWithPointerCompressionTest = TestWithIsolateAndPointerCompression;
      21             : 
      22       15443 : TEST(Heap, SemiSpaceSize) {
      23             :   const size_t MB = static_cast<size_t>(i::MB);
      24             :   const size_t pm = i::Heap::kPointerMultiplier;
      25           2 :   ASSERT_EQ(512u * pm, i::Heap::ComputeMaxSemiSpaceSize(0u));
      26           2 :   ASSERT_EQ(512u * pm, i::Heap::ComputeMaxSemiSpaceSize(512u * MB));
      27           2 :   ASSERT_EQ(2048u * pm, i::Heap::ComputeMaxSemiSpaceSize(1024u * MB));
      28           2 :   ASSERT_EQ(5120u * pm, i::Heap::ComputeMaxSemiSpaceSize(2024u * MB));
      29           2 :   ASSERT_EQ(8192u * pm, i::Heap::ComputeMaxSemiSpaceSize(4095u * MB));
      30             : }
      31             : 
      32       15444 : TEST_F(HeapTest, ASLR) {
      33             : #if V8_TARGET_ARCH_X64
      34             : #if V8_OS_MACOSX
      35             :   Heap* heap = i_isolate()->heap();
      36             :   std::set<void*> hints;
      37             :   for (int i = 0; i < 1000; i++) {
      38             :     hints.insert(heap->GetRandomMmapAddr());
      39             :   }
      40             :   if (hints.size() == 1) {
      41             :     EXPECT_TRUE((*hints.begin()) == nullptr);
      42             :     EXPECT_TRUE(i::GetRandomMmapAddr() == nullptr);
      43             :   } else {
      44             :     // It is unlikely that 1000 random samples will collide to less then 500
      45             :     // values.
      46             :     EXPECT_GT(hints.size(), 500u);
      47             :     const uintptr_t kRegionMask = 0xFFFFFFFFu;
      48             :     void* first = *hints.begin();
      49             :     for (void* hint : hints) {
      50             :       uintptr_t diff = reinterpret_cast<uintptr_t>(first) ^
      51             :                        reinterpret_cast<uintptr_t>(hint);
      52             :       EXPECT_LE(diff, kRegionMask);
      53             :     }
      54             :   }
      55             : #endif  // V8_OS_MACOSX
      56             : #endif  // V8_TARGET_ARCH_X64
      57           1 : }
      58             : 
      59       15444 : TEST_F(HeapTest, ExternalLimitDefault) {
      60             :   Heap* heap = i_isolate()->heap();
      61           2 :   EXPECT_EQ(kExternalAllocationSoftLimit,
      62           0 :             heap->isolate()->isolate_data()->external_memory_limit_);
      63           1 : }
      64             : 
      65       15444 : TEST_F(HeapTest, ExternalLimitStaysAboveDefaultForExplicitHandling) {
      66             :   v8_isolate()->AdjustAmountOfExternalAllocatedMemory(+10 * MB);
      67             :   v8_isolate()->AdjustAmountOfExternalAllocatedMemory(-10 * MB);
      68             :   Heap* heap = i_isolate()->heap();
      69           1 :   EXPECT_GE(heap->isolate()->isolate_data()->external_memory_limit_,
      70           0 :             kExternalAllocationSoftLimit);
      71           1 : }
      72             : 
      73             : #if V8_TARGET_ARCH_64_BIT
      74       15444 : TEST_F(HeapWithPointerCompressionTest, HeapLayout) {
      75             :   // Produce some garbage.
      76             :   RunJS(
      77             :       "let ar = [];"
      78             :       "for (let i = 0; i < 100; i++) {"
      79             :       "  ar.push(Array(i));"
      80             :       "}"
      81           1 :       "ar.push(Array(32 * 1024 * 1024));");
      82             : 
      83             :   Address isolate_root = i_isolate()->isolate_root();
      84           1 :   EXPECT_TRUE(IsAligned(isolate_root, size_t{4} * GB));
      85             : 
      86             :   // Check that all memory chunks belong this region.
      87             :   base::AddressRegion heap_reservation(isolate_root - size_t{2} * GB,
      88           1 :                                        size_t{4} * GB);
      89             : 
      90             :   OldGenerationMemoryChunkIterator iter(i_isolate()->heap());
      91           5 :   for (;;) {
      92           6 :     MemoryChunk* chunk = iter.next();
      93           6 :     if (chunk == nullptr) break;
      94             : 
      95             :     Address address = chunk->address();
      96           5 :     size_t size = chunk->area_end() - address;
      97           5 :     EXPECT_TRUE(heap_reservation.contains(address, size));
      98             :   }
      99           1 : }
     100             : #endif  // V8_TARGET_ARCH_64_BIT
     101             : 
     102             : }  // namespace internal
     103        9264 : }  // namespace v8