blob: c1011c3f89ac8c9aec6720d1d6226fb2f4dae03e (
plain)
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
|
// Copyright 2016 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.
#ifndef V8_WASM_WASM_LIMITS_H_
#define V8_WASM_WASM_LIMITS_H_
#include <cstddef>
#include <cstdint>
#include <limits>
#include "src/wasm/wasm-constants.h"
namespace v8 {
namespace internal {
namespace wasm {
// The following limits are imposed by V8 on WebAssembly modules.
// The limits are agreed upon with other engines for consistency.
constexpr size_t kV8MaxWasmTypes = 1000000;
constexpr size_t kV8MaxWasmFunctions = 1000000;
constexpr size_t kV8MaxWasmImports = 100000;
constexpr size_t kV8MaxWasmExports = 100000;
constexpr size_t kV8MaxWasmGlobals = 1000000;
constexpr size_t kV8MaxWasmExceptions = 1000000;
constexpr size_t kV8MaxWasmExceptionTypes = 1000000;
constexpr size_t kV8MaxWasmDataSegments = 100000;
// Don't use this limit directly, but use the value of FLAG_wasm_max_mem_pages.
// Current limit mimics the maximum allowed allocation on an ArrayBuffer
// (2GiB - 1 page).
constexpr size_t kV8MaxWasmMemoryPages = 32767; // ~ 2 GiB
constexpr size_t kV8MaxWasmStringSize = 100000;
constexpr size_t kV8MaxWasmModuleSize = 1024 * 1024 * 1024; // = 1 GiB
constexpr size_t kV8MaxWasmFunctionSize = 7654321;
constexpr size_t kV8MaxWasmFunctionLocals = 50000;
constexpr size_t kV8MaxWasmFunctionParams = 1000;
constexpr size_t kV8MaxWasmFunctionMultiReturns = 1000;
constexpr size_t kV8MaxWasmFunctionReturns = 1;
// Don't use this limit directly, but use the value of FLAG_wasm_max_table_size.
constexpr size_t kV8MaxWasmTableSize = 10000000;
constexpr size_t kV8MaxWasmTableEntries = 10000000;
constexpr size_t kV8MaxWasmTables = 1;
constexpr size_t kV8MaxWasmMemories = 1;
constexpr size_t kSpecMaxWasmMemoryPages = 65536;
static_assert(kV8MaxWasmMemoryPages <= kSpecMaxWasmMemoryPages,
"v8 should not be more permissive than the spec");
constexpr size_t kSpecMaxWasmTableSize = 0xFFFFFFFFu;
constexpr size_t kV8MaxWasmMemoryBytes = kV8MaxWasmMemoryPages * kWasmPageSize;
static_assert(kV8MaxWasmMemoryBytes <= std::numeric_limits<int32_t>::max(),
"max memory bytes should fit in int32_t");
constexpr uint64_t kWasmMaxHeapOffset =
static_cast<uint64_t>(
std::numeric_limits<uint32_t>::max()) // maximum base value
+ std::numeric_limits<uint32_t>::max(); // maximum index value
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_WASM_LIMITS_H_
|
