1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdlib.h>
#include <string.h>
#if V8_OS_POSIX
#include <setjmp.h>
#include <signal.h>
#include <unistd.h> // NOLINT
#endif
#include "src/v8.h"
#include "test/cctest/cctest.h"
using v8::internal::AccountingAllocator;
using v8::IdleTask;
using v8::Isolate;
using v8::Task;
#include "src/allocation.h"
#include "src/zone/accounting-allocator.h"
// ASAN isn't configured to return nullptr, so skip all of these tests.
#if !defined(V8_USE_ADDRESS_SANITIZER) && !defined(MEMORY_SANITIZER) && \
!defined(THREAD_SANITIZER)
namespace {
// Implementation of v8::Platform that can register OOM callbacks.
class AllocationPlatform : public TestPlatform {
public:
AllocationPlatform() {
current_platform = this;
// Now that it's completely constructed, make this the current platform.
i::V8::SetPlatformForTesting(this);
}
virtual ~AllocationPlatform() = default;
void OnCriticalMemoryPressure() override { oom_callback_called = true; }
bool OnCriticalMemoryPressure(size_t length) override {
oom_callback_called = true;
return true;
}
static AllocationPlatform* current_platform;
bool oom_callback_called = false;
};
AllocationPlatform* AllocationPlatform::current_platform = nullptr;
bool DidCallOnCriticalMemoryPressure() {
return AllocationPlatform::current_platform &&
AllocationPlatform::current_platform->oom_callback_called;
}
// No OS should be able to malloc/new this number of bytes. Generate enough
// random values in the address space to get a very large fraction of it. Using
// even larger values is that overflow from rounding or padding can cause the
// allocations to succeed somehow.
size_t GetHugeMemoryAmount() {
static size_t huge_memory = 0;
if (!huge_memory) {
for (int i = 0; i < 100; i++) {
huge_memory |= bit_cast<size_t>(v8::internal::GetRandomMmapAddr());
}
// Make it larger than the available address space.
huge_memory *= 2;
CHECK_NE(0, huge_memory);
}
return huge_memory;
}
void OnMallocedOperatorNewOOM(const char* location, const char* message) {
// exit(0) if the OOM callback was called and location matches expectation.
if (DidCallOnCriticalMemoryPressure())
exit(strcmp(location, "Malloced operator new"));
exit(1);
}
void OnNewArrayOOM(const char* location, const char* message) {
// exit(0) if the OOM callback was called and location matches expectation.
if (DidCallOnCriticalMemoryPressure()) exit(strcmp(location, "NewArray"));
exit(1);
}
void OnAlignedAllocOOM(const char* location, const char* message) {
// exit(0) if the OOM callback was called and location matches expectation.
if (DidCallOnCriticalMemoryPressure()) exit(strcmp(location, "AlignedAlloc"));
exit(1);
}
} // namespace
TEST(AccountingAllocatorOOM) {
AllocationPlatform platform;
v8::internal::AccountingAllocator allocator;
CHECK(!platform.oom_callback_called);
v8::internal::Segment* result = allocator.GetSegment(GetHugeMemoryAmount());
// On a few systems, allocation somehow succeeds.
CHECK_EQ(result == nullptr, platform.oom_callback_called);
}
TEST(MallocedOperatorNewOOM) {
AllocationPlatform platform;
CHECK(!platform.oom_callback_called);
CcTest::isolate()->SetFatalErrorHandler(OnMallocedOperatorNewOOM);
// On failure, this won't return, since a Malloced::New failure is fatal.
// In that case, behavior is checked in OnMallocedOperatorNewOOM before exit.
void* result = v8::internal::Malloced::New(GetHugeMemoryAmount());
// On a few systems, allocation somehow succeeds.
CHECK_EQ(result == nullptr, platform.oom_callback_called);
}
TEST(NewArrayOOM) {
AllocationPlatform platform;
CHECK(!platform.oom_callback_called);
CcTest::isolate()->SetFatalErrorHandler(OnNewArrayOOM);
// On failure, this won't return, since a NewArray failure is fatal.
// In that case, behavior is checked in OnNewArrayOOM before exit.
int8_t* result = v8::internal::NewArray<int8_t>(GetHugeMemoryAmount());
// On a few systems, allocation somehow succeeds.
CHECK_EQ(result == nullptr, platform.oom_callback_called);
}
TEST(AlignedAllocOOM) {
AllocationPlatform platform;
CHECK(!platform.oom_callback_called);
CcTest::isolate()->SetFatalErrorHandler(OnAlignedAllocOOM);
// On failure, this won't return, since an AlignedAlloc failure is fatal.
// In that case, behavior is checked in OnAlignedAllocOOM before exit.
void* result = v8::internal::AlignedAlloc(GetHugeMemoryAmount(),
v8::internal::AllocatePageSize());
// On a few systems, allocation somehow succeeds.
CHECK_EQ(result == nullptr, platform.oom_callback_called);
}
TEST(AllocVirtualMemoryOOM) {
AllocationPlatform platform;
CHECK(!platform.oom_callback_called);
v8::internal::VirtualMemory result;
bool success =
v8::internal::AllocVirtualMemory(GetHugeMemoryAmount(), nullptr, &result);
// On a few systems, allocation somehow succeeds.
CHECK_IMPLIES(success, result.IsReserved());
CHECK_IMPLIES(!success, !result.IsReserved() && platform.oom_callback_called);
}
TEST(AlignedAllocVirtualMemoryOOM) {
AllocationPlatform platform;
CHECK(!platform.oom_callback_called);
v8::internal::VirtualMemory result;
bool success = v8::internal::AlignedAllocVirtualMemory(
GetHugeMemoryAmount(), v8::internal::AllocatePageSize(), nullptr,
&result);
// On a few systems, allocation somehow succeeds.
CHECK_IMPLIES(success, result.IsReserved());
CHECK_IMPLIES(!success, !result.IsReserved() && platform.oom_callback_called);
}
#endif // !defined(V8_USE_ADDRESS_SANITIZER) && !defined(MEMORY_SANITIZER) &&
// !defined(THREAD_SANITIZER)
|
