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 "FTLOSRExitHandle.h"
28
29#if ENABLE(FTL_JIT)
30
31#include "FTLOSRExit.h"
32#include "FTLState.h"
33#include "FTLThunks.h"
34#include "LinkBuffer.h"
35#include "ProfilerCompilation.h"
36
37namespace JSC { namespace FTL {
38
39void OSRExitHandle::emitExitThunk(State& state, CCallHelpers& jit)
40{
41 Profiler::Compilation* compilation = state.graph.compilation();
42 CCallHelpers::Label myLabel = jit.label();
43 label = myLabel;
44 jit.pushToSaveImmediateWithoutTouchingRegisters(CCallHelpers::TrustedImm32(index));
45 CCallHelpers::PatchableJump jump = jit.patchableJump();
46 RefPtr<OSRExitHandle> self = this;
47 VM& vm = state.vm();
48 jit.addLinkTask(
49 [self, jump, myLabel, compilation, &vm] (LinkBuffer& linkBuffer) {
50 self->exit.m_patchableJump = CodeLocationJump<JSInternalPtrTag>(linkBuffer.locationOf<JSInternalPtrTag>(jump));
51
52 linkBuffer.link(
53 jump.m_jump,
54 CodeLocationLabel<JITThunkPtrTag>(vm.getCTIStub(osrExitGenerationThunkGenerator).code()));
55 if (compilation)
56 compilation->addOSRExitSite({ linkBuffer.locationOf<JSInternalPtrTag>(myLabel) });
57 });
58}
59
60} } // namespace JSC::FTL
61
62#endif // ENABLE(FTL_JIT)
63
64