The Tor Browser / file comparison
comparison: js/src/jit/mips/Bailouts-mips.cpp
js/src/jit/mips/Bailouts-mips.cpp
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:026dacefd901 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "jit/mips/Bailouts-mips.h" | |
| 8 | |
| 9 #include "jscntxt.h" | |
| 10 #include "jscompartment.h" | |
| 11 | |
| 12 using namespace js; | |
| 13 using namespace js::jit; | |
| 14 | |
| 15 IonBailoutIterator::IonBailoutIterator(const JitActivationIterator &activations, | |
| 16 BailoutStack *bailout) | |
| 17 : IonFrameIterator(activations), | |
| 18 machine_(bailout->machine()) | |
| 19 { | |
| 20 uint8_t *sp = bailout->parentStackPointer(); | |
| 21 uint8_t *fp = sp + bailout->frameSize(); | |
| 22 | |
| 23 current_ = fp; | |
| 24 type_ = JitFrame_IonJS; | |
| 25 topFrameSize_ = current_ - sp; | |
| 26 topIonScript_ = script()->ionScript(); | |
| 27 | |
| 28 if (bailout->frameClass() == FrameSizeClass::None()) { | |
| 29 snapshotOffset_ = bailout->snapshotOffset(); | |
| 30 return; | |
| 31 } | |
| 32 | |
| 33 // Compute the snapshot offset from the bailout ID. | |
| 34 JitActivation *activation = activations.activation()->asJit(); | |
| 35 JSRuntime *rt = activation->compartment()->runtimeFromMainThread(); | |
| 36 JitCode *code = rt->jitRuntime()->getBailoutTable(bailout->frameClass()); | |
| 37 uintptr_t tableOffset = bailout->tableOffset(); | |
| 38 uintptr_t tableStart = reinterpret_cast<uintptr_t>(code->raw()); | |
| 39 | |
| 40 MOZ_ASSERT(tableOffset >= tableStart && | |
| 41 tableOffset < tableStart + code->instructionsSize()); | |
| 42 MOZ_ASSERT((tableOffset - tableStart) % BAILOUT_TABLE_ENTRY_SIZE == 0); | |
| 43 | |
| 44 uint32_t bailoutId = ((tableOffset - tableStart) / BAILOUT_TABLE_ENTRY_SIZE) - 1; | |
| 45 MOZ_ASSERT(bailoutId < BAILOUT_TABLE_SIZE); | |
| 46 | |
| 47 snapshotOffset_ = topIonScript_->bailoutToSnapshot(bailoutId); | |
| 48 } | |
| 49 | |
| 50 IonBailoutIterator::IonBailoutIterator(const JitActivationIterator &activations, | |
| 51 InvalidationBailoutStack *bailout) | |
| 52 : IonFrameIterator(activations), | |
| 53 machine_(bailout->machine()) | |
| 54 { | |
| 55 returnAddressToFp_ = bailout->osiPointReturnAddress(); | |
| 56 topIonScript_ = bailout->ionScript(); | |
| 57 const OsiIndex *osiIndex = topIonScript_->getOsiIndex(returnAddressToFp_); | |
| 58 | |
| 59 current_ = (uint8_t*) bailout->fp(); | |
| 60 type_ = JitFrame_IonJS; | |
| 61 topFrameSize_ = current_ - bailout->sp(); | |
| 62 snapshotOffset_ = osiIndex->snapshotOffset(); | |
| 63 } |
