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63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "jit/osxppc/Bailouts-ppc.h"
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#include "jscntxt.h"
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#include "jscompartment.h"
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using namespace js;
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using namespace js::jit;
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BailoutFrameInfo::BailoutFrameInfo(const JitActivationIterator &activations,
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BailoutStack *bailout)
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: machine_(bailout->machine())
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{
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uint8_t *sp = bailout->parentStackPointer();
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framePointer_ = sp + bailout->frameSize();
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topFrameSize_ = framePointer_ - sp;
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JSScript *script = ScriptFromCalleeToken(((JitFrameLayout *) framePointer_)->calleeToken());
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JitActivation *activation = activations.activation()->asJit();
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topIonScript_ = script->ionScript();
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attachOnJitActivation(activations);
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if (bailout->frameClass() == FrameSizeClass::None()) {
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snapshotOffset_ = bailout->snapshotOffset();
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return;
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}
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// Compute the snapshot offset from the bailout ID.
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JSRuntime *rt = activation->compartment()->runtimeFromMainThread();
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JitCode *code = rt->jitRuntime()->getBailoutTable(bailout->frameClass());
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uintptr_t tableOffset = bailout->tableOffset();
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uintptr_t tableStart = reinterpret_cast<uintptr_t>(code->raw());
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MOZ_ASSERT(tableOffset >= tableStart &&
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tableOffset < tableStart + code->instructionsSize());
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MOZ_ASSERT((tableOffset - tableStart) % BAILOUT_TABLE_ENTRY_SIZE == 0);
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uint32_t bailoutId = ((tableOffset - tableStart) / BAILOUT_TABLE_ENTRY_SIZE) - 1;
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MOZ_ASSERT(bailoutId < BAILOUT_TABLE_SIZE);
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snapshotOffset_ = topIonScript_->bailoutToSnapshot(bailoutId);
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}
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BailoutFrameInfo::BailoutFrameInfo(const JitActivationIterator &activations,
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InvalidationBailoutStack *bailout)
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: machine_(bailout->machine())
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{
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framePointer_ = (uint8_t*) bailout->fp();
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topFrameSize_ = framePointer_ - bailout->sp();
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topIonScript_ = bailout->ionScript();
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attachOnJitActivation(activations);
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uint8_t *returnAddressToFp_ = bailout->osiPointReturnAddress();
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const OsiIndex *osiIndex = topIonScript_->getOsiIndex(returnAddressToFp_);
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snapshotOffset_ = osiIndex->snapshotOffset();
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}
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