| 1 | /*
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| 2 | * Copyright (C) 2013-2017 Apple Inc. All rights reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | * 1. Redistributions of source code must retain the above copyright
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| 8 | * notice, this list of conditions and the following disclaimer.
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| 9 | * 2. Redistributions in binary form must reproduce the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer in the
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| 11 | * documentation and/or other materials provided with the distribution.
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| 12 | *
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| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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| 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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| 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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| 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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| 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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| 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 24 | */
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| 25 |
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| 26 | #include "config.h"
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| 27 | #include "DFGJumpReplacement.h"
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| 28 |
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| 29 | #if ENABLE(DFG_JIT)
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| 30 |
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| 31 | #include "MacroAssembler.h"
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| 32 | #include "Options.h"
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| 33 |
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| 34 | namespace JSC { namespace DFG {
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| 35 |
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| 36 | void JumpReplacement::fire()
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| 37 | {
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| 38 | dataLogLnIf(Options::dumpDisassembly(),
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| 39 | "Firing jump replacement watchpoint from ", RawPointer(m_source.dataLocation()),
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| 40 | " to ", RawPointer(m_destination.dataLocation()));
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| 41 | MacroAssembler::replaceWithJump(m_source, m_destination);
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| 42 | }
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| 43 |
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| 44 | void JumpReplacement::installVMTrapBreakpoint()
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| 45 | {
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| 46 | #if ENABLE(SIGNAL_BASED_VM_TRAPS)
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| 47 | MacroAssembler::replaceWithVMHalt(m_source);
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| 48 | #else
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| 49 | UNREACHABLE_FOR_PLATFORM();
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| 50 | #endif
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| 51 | }
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| 52 |
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| 53 | } } // namespace JSC::DFG
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| 54 |
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| 55 | #endif // ENABLE(DFG_JIT)
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| 56 |
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