1/*
2 * Copyright (C) 2015-2018 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 "FTLLazySlowPath.h"
28
29#if ENABLE(FTL_JIT)
30
31#include "FTLSlowPathCall.h"
32#include "LinkBuffer.h"
33
34namespace JSC { namespace FTL {
35
36LazySlowPath::~LazySlowPath()
37{
38}
39
40void LazySlowPath::initialize(
41 CodeLocationJump<JSInternalPtrTag> patchableJump, CodeLocationLabel<JSInternalPtrTag> done,
42 CodeLocationLabel<ExceptionHandlerPtrTag> exceptionTarget,
43 const RegisterSet& usedRegisters, CallSiteIndex callSiteIndex, RefPtr<Generator> generator
44 )
45{
46 m_patchableJump = patchableJump;
47 m_done = done;
48 m_exceptionTarget = exceptionTarget;
49 m_usedRegisters = usedRegisters;
50 m_callSiteIndex = callSiteIndex;
51 m_generator = generator;
52}
53
54void LazySlowPath::generate(CodeBlock* codeBlock)
55{
56 RELEASE_ASSERT(!m_stub);
57
58 CCallHelpers jit(codeBlock);
59 GenerationParams params;
60 CCallHelpers::JumpList exceptionJumps;
61 params.exceptionJumps = m_exceptionTarget ? &exceptionJumps : nullptr;
62 params.lazySlowPath = this;
63
64 m_generator->run(jit, params);
65
66 LinkBuffer linkBuffer(jit, codeBlock, JITCompilationMustSucceed);
67 linkBuffer.link(params.doneJumps, m_done);
68 if (m_exceptionTarget)
69 linkBuffer.link(exceptionJumps, m_exceptionTarget);
70 m_stub = FINALIZE_CODE_FOR(codeBlock, linkBuffer, JITStubRoutinePtrTag, "Lazy slow path call stub");
71
72 MacroAssembler::repatchJump(m_patchableJump, CodeLocationLabel<JITStubRoutinePtrTag>(m_stub.code()));
73}
74
75} } // namespace JSC::FTL
76
77#endif // ENABLE(FTL_JIT)
78