1/*
2 * Copyright (C) 2016-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "B3WasmBoundsCheckValue.h"
28#include "WasmMemory.h"
29
30#if ENABLE(B3_JIT)
31
32#include "B3ValueInlines.h"
33
34namespace JSC { namespace B3 {
35
36WasmBoundsCheckValue::~WasmBoundsCheckValue()
37{
38}
39
40WasmBoundsCheckValue::WasmBoundsCheckValue(Origin origin, GPRReg pinnedSize, Value* ptr, unsigned offset)
41 : Value(CheckedOpcode, WasmBoundsCheck, One, origin, ptr)
42 , m_offset(offset)
43 , m_boundsType(Type::Pinned)
44{
45 m_bounds.pinnedSize = pinnedSize;
46}
47
48WasmBoundsCheckValue::WasmBoundsCheckValue(Origin origin, Value* ptr, unsigned offset, size_t maximum)
49 : Value(CheckedOpcode, WasmBoundsCheck, One, origin, ptr)
50 , m_offset(offset)
51 , m_boundsType(Type::Maximum)
52{
53#if ENABLE(WEBASSEMBLY)
54 size_t redzoneLimit = static_cast<uint64_t>(std::numeric_limits<uint32_t>::max()) + Wasm::Memory::fastMappedRedzoneBytes();
55 ASSERT_UNUSED(redzoneLimit, maximum <= redzoneLimit);
56#endif
57 m_bounds.maximum = maximum;
58}
59
60void WasmBoundsCheckValue::dumpMeta(CommaPrinter& comma, PrintStream& out) const
61{
62 switch (m_boundsType) {
63 case Type::Pinned:
64 out.print(comma, "offset = ", m_offset, comma, "pinnedSize = ", m_bounds.pinnedSize);
65 break;
66 case Type::Maximum:
67 out.print(comma, "offset = ", m_offset, comma, "maximum = ", m_bounds.maximum);
68 break;
69 }
70}
71
72} } // namespace JSC::B3
73
74#endif // ENABLE(B3_JIT)
75