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
|
/*
* Copyright (C) 2015-2016 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. ``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
* 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.
*/
#pragma once
#if ENABLE(B3_JIT)
#include "B3StackmapSpecial.h"
namespace JSC { namespace B3 {
// This is a special that recognizes that there are two uses of Patchpoint: Void and and non-Void.
// In the Void case, the syntax of the Air Patch instruction is:
//
// Patch &patchpoint, args...
//
// Where "args..." are the lowered arguments to the Patchpoint instruction. In the non-Void case
// we will have:
//
// Patch &patchpoint, result, args...
class PatchpointSpecial final : public StackmapSpecial {
public:
JS_EXPORT_PRIVATE PatchpointSpecial();
JS_EXPORT_PRIVATE ~PatchpointSpecial() final;
private:
void forEachArg(Air::Inst&, const ScopedLambda<Air::Inst::EachArgCallback>&) final;
bool isValid(Air::Inst&) final;
bool admitsStack(Air::Inst&, unsigned argIndex) final;
bool admitsExtendedOffsetAddr(Air::Inst&, unsigned) final;
// NOTE: the generate method will generate the hidden branch and then register a LatePath that
// generates the stackmap. Super crazy dude!
MacroAssembler::Jump generate(Air::Inst&, CCallHelpers&, Air::GenerationContext&) final;
bool isTerminal(Air::Inst&) final;
void dumpImpl(PrintStream&) const final;
void deepDumpImpl(PrintStream&) const final;
};
} } // namespace JSC::B3
#endif // ENABLE(B3_JIT)
|
