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
|
/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef FunctionCall_h
#define FunctionCall_h
#if ENABLE(CSS_SELECTOR_JIT)
#include "RegisterAllocator.h"
#include "StackAllocator.h"
#include <JavaScriptCore/GPRInfo.h>
#include <JavaScriptCore/MacroAssembler.h>
namespace WebCore {
class FunctionCall {
public:
FunctionCall(JSC::MacroAssembler& assembler, const RegisterAllocator& registerAllocator, StackAllocator& stackAllocator, Vector<std::pair<JSC::MacroAssembler::Call, JSC::FunctionPtr>>& callRegistry)
: m_assembler(assembler)
, m_registerAllocator(registerAllocator)
, m_stackAllocator(stackAllocator)
, m_callRegistry(callRegistry)
, m_firstArgument(0)
{
}
void setFunctionAddress(JSC::FunctionPtr functionAddress)
{
m_functionAddress = functionAddress;
}
void setFirstArgument(const JSC::MacroAssembler::RegisterID& registerID)
{
m_firstArgument = ®isterID;
}
void call()
{
prepareAndCall();
cleanupPostCall();
}
JSC::MacroAssembler::Jump callAndBranchOnCondition(JSC::MacroAssembler::ResultCondition condition)
{
prepareAndCall();
m_assembler.test32(JSC::GPRInfo::returnValueGPR, JSC::MacroAssembler::TrustedImm32(0xff));
cleanupPostCall();
return m_assembler.branch(condition);
}
private:
void prepareAndCall()
{
ASSERT(m_functionAddress.executableAddress());
saveAllocatedRegisters();
m_stackAllocator.alignStackPreFunctionCall();
if (m_firstArgument && *m_firstArgument != JSC::GPRInfo::argumentGPR0)
m_assembler.move(*m_firstArgument, JSC::GPRInfo::argumentGPR0);
JSC::MacroAssembler::Call call = m_assembler.call();
m_callRegistry.append(std::make_pair(call, m_functionAddress));
}
void cleanupPostCall()
{
m_stackAllocator.unalignStackPostFunctionCall();
restoreAllocatedRegisters();
}
void saveAllocatedRegisters()
{
ASSERT(m_savedRegisterStackReferences.isEmpty());
unsigned allocatedRegistersCount = m_registerAllocator.allocatedRegisters().size();
m_savedRegisterStackReferences.reserveCapacity(allocatedRegistersCount);
for (unsigned i = 0; i < allocatedRegistersCount; ++i) {
JSC::MacroAssembler::RegisterID registerID = m_registerAllocator.allocatedRegisters()[i];
m_savedRegisterStackReferences.append(m_stackAllocator.push(registerID));
}
}
void restoreAllocatedRegisters()
{
for (unsigned i = m_registerAllocator.allocatedRegisters().size(); i > 0; --i)
m_stackAllocator.pop(m_savedRegisterStackReferences[i - 1], m_registerAllocator.allocatedRegisters()[i - 1]);
m_savedRegisterStackReferences.clear();
}
JSC::MacroAssembler& m_assembler;
const RegisterAllocator& m_registerAllocator;
StackAllocator& m_stackAllocator;
Vector<std::pair<JSC::MacroAssembler::Call, JSC::FunctionPtr>>& m_callRegistry;
Vector<StackAllocator::StackReference> m_savedRegisterStackReferences;
JSC::FunctionPtr m_functionAddress;
const JSC::MacroAssembler::RegisterID* m_firstArgument;
};
} // namespace WebCore
#endif // ENABLE(CSS_SELECTOR_JIT)
#endif // FunctionCall_h
|
