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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "jit/Bailouts.h"
using namespace js;
using namespace js::jit;
#if defined(_WIN32)
# pragma pack(push, 1)
#endif
namespace js {
namespace jit {
class BailoutStack
{
RegisterDump::FPUArray fpregs_;
RegisterDump::GPRArray regs_;
uintptr_t frameSize_;
uintptr_t snapshotOffset_;
public:
MachineState machineState() {
return MachineState::FromBailout(regs_, fpregs_);
}
uint32_t snapshotOffset() const {
return snapshotOffset_;
}
uint32_t frameSize() const {
return frameSize_;
}
uint8_t* parentStackPointer() {
return (uint8_t*)this + sizeof(BailoutStack);
}
};
} // namespace jit
} // namespace js
#if defined(_WIN32)
# pragma pack(pop)
#endif
BailoutFrameInfo::BailoutFrameInfo(const JitActivationIterator& activations,
BailoutStack* bailout)
: machine_(bailout->machineState())
{
uint8_t* sp = bailout->parentStackPointer();
framePointer_ = sp + bailout->frameSize();
topFrameSize_ = framePointer_ - sp;
JSScript* script = ScriptFromCalleeToken(((JitFrameLayout*) framePointer_)->calleeToken());
topIonScript_ = script->ionScript();
attachOnJitActivation(activations);
snapshotOffset_ = bailout->snapshotOffset();
}
BailoutFrameInfo::BailoutFrameInfo(const JitActivationIterator& activations,
InvalidationBailoutStack* bailout)
: machine_(bailout->machine())
{
framePointer_ = (uint8_t*) bailout->fp();
topFrameSize_ = framePointer_ - bailout->sp();
topIonScript_ = bailout->ionScript();
attachOnJitActivation(activations);
uint8_t* returnAddressToFp_ = bailout->osiPointReturnAddress();
const OsiIndex* osiIndex = topIonScript_->getOsiIndex(returnAddressToFp_);
snapshotOffset_ = osiIndex->snapshotOffset();
}
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