https://github.com/mozilla/gecko-dev
Tip revision: 3d6c54b1a683ad71216605ec7efbd06e18ca5a40 authored by ffxbld on 15 February 2013, 20:44:42 UTC
Added FENNEC_19_0_RELEASE FENNEC_19_0_BUILD1 tag(s) for changeset 14bf1f7cde21. DONTBUILD CLOSED TREE a=release
Added FENNEC_19_0_RELEASE FENNEC_19_0_BUILD1 tag(s) for changeset 14bf1f7cde21. DONTBUILD CLOSED TREE a=release
Tip revision: 3d6c54b
Barrier-inl.h
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sw=4 et tw=78:
*
* 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/. */
#ifndef jsgc_barrier_inl_h___
#define jsgc_barrier_inl_h___
#include "gc/Barrier.h"
#include "gc/Marking.h"
#include "vm/ObjectImpl-inl.h"
#include "vm/String-inl.h"
namespace js {
template <typename T, typename Unioned>
void
EncapsulatedPtr<T, Unioned>::pre()
{
T::writeBarrierPre(value);
}
template <typename T>
inline void
RelocatablePtr<T>::post()
{
#ifdef JSGC_GENERATIONAL
JS_ASSERT(this->value);
this->value->compartment()->gcStoreBuffer.putRelocatableCell((gc::Cell **)&this->value);
#endif
}
template <typename T>
inline void
RelocatablePtr<T>::relocate(JSCompartment *comp)
{
#ifdef JSGC_GENERATIONAL
comp->gcStoreBuffer.removeRelocatableCell((gc::Cell **)&this->value);
#endif
}
inline void
EncapsulatedValue::writeBarrierPre(const Value &value)
{
#ifdef JSGC_INCREMENTAL
if (value.isMarkable()) {
js::gc::Cell *cell = (js::gc::Cell *)value.toGCThing();
writeBarrierPre(cell->compartment(), value);
}
#endif
}
inline void
EncapsulatedValue::writeBarrierPre(JSCompartment *comp, const Value &value)
{
#ifdef JSGC_INCREMENTAL
if (comp->needsBarrier()) {
Value tmp(value);
js::gc::MarkValueUnbarriered(comp->barrierTracer(), &tmp, "write barrier");
JS_ASSERT(tmp == value);
}
#endif
}
inline void
EncapsulatedValue::pre()
{
writeBarrierPre(value);
}
inline void
EncapsulatedValue::pre(JSCompartment *comp)
{
writeBarrierPre(comp, value);
}
inline
HeapValue::HeapValue()
: EncapsulatedValue(UndefinedValue())
{
post();
}
inline
HeapValue::HeapValue(const Value &v)
: EncapsulatedValue(v)
{
JS_ASSERT(!IsPoisonedValue(v));
post();
}
inline
HeapValue::HeapValue(const HeapValue &v)
: EncapsulatedValue(v.value)
{
JS_ASSERT(!IsPoisonedValue(v.value));
post();
}
inline
HeapValue::~HeapValue()
{
pre();
}
inline void
HeapValue::init(const Value &v)
{
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post();
}
inline void
HeapValue::init(JSCompartment *comp, const Value &v)
{
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post(comp);
}
inline HeapValue &
HeapValue::operator=(const Value &v)
{
pre();
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post();
return *this;
}
inline HeapValue &
HeapValue::operator=(const HeapValue &v)
{
pre();
JS_ASSERT(!IsPoisonedValue(v.value));
value = v.value;
post();
return *this;
}
inline void
HeapValue::set(JSCompartment *comp, const Value &v)
{
#ifdef DEBUG
if (value.isMarkable()) {
js::gc::Cell *cell = (js::gc::Cell *)value.toGCThing();
JS_ASSERT(cell->compartment() == comp ||
cell->compartment() == comp->rt->atomsCompartment);
}
#endif
pre(comp);
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post(comp);
}
inline void
HeapValue::writeBarrierPost(const Value &value, Value *addr)
{
#ifdef JSGC_GENERATIONAL
if (value.isMarkable()) {
js::gc::Cell *cell = (js::gc::Cell *)value.toGCThing();
cell->compartment()->gcStoreBuffer.putValue(addr);
}
#endif
}
inline void
HeapValue::writeBarrierPost(JSCompartment *comp, const Value &value, Value *addr)
{
#ifdef JSGC_GENERATIONAL
if (value.isMarkable())
comp->gcStoreBuffer.putValue(addr);
#endif
}
inline void
HeapValue::post()
{
writeBarrierPost(value, &value);
}
inline void
HeapValue::post(JSCompartment *comp)
{
writeBarrierPost(comp, value, &value);
}
inline
RelocatableValue::RelocatableValue()
: EncapsulatedValue(UndefinedValue())
{
}
inline
RelocatableValue::RelocatableValue(const Value &v)
: EncapsulatedValue(v)
{
JS_ASSERT(!IsPoisonedValue(v));
post();
}
inline
RelocatableValue::RelocatableValue(const RelocatableValue &v)
: EncapsulatedValue(v.value)
{
JS_ASSERT(!IsPoisonedValue(v.value));
post();
}
inline
RelocatableValue::~RelocatableValue()
{
pre();
relocate();
}
inline RelocatableValue &
RelocatableValue::operator=(const Value &v)
{
pre();
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post();
return *this;
}
inline RelocatableValue &
RelocatableValue::operator=(const RelocatableValue &v)
{
pre();
JS_ASSERT(!IsPoisonedValue(v.value));
value = v.value;
post();
return *this;
}
inline void
RelocatableValue::post()
{
#ifdef JSGC_GENERATIONAL
if (value.isMarkable()) {
js::gc::Cell *cell = (js::gc::Cell *)value.toGCThing();
cell->compartment()->gcStoreBuffer.putRelocatableValue(&value);
}
#endif
}
inline void
RelocatableValue::post(JSCompartment *comp)
{
#ifdef JSGC_GENERATIONAL
if (value.isMarkable())
comp->gcStoreBuffer.putRelocatableValue(&value);
#endif
}
inline void
RelocatableValue::relocate()
{
#ifdef JSGC_GENERATIONAL
if (value.isMarkable()) {
js::gc::Cell *cell = (js::gc::Cell *)value.toGCThing();
cell->compartment()->gcStoreBuffer.removeRelocatableValue(&value);
}
#endif
}
inline
HeapSlot::HeapSlot(JSObject *obj, uint32_t slot, const Value &v)
: EncapsulatedValue(v)
{
JS_ASSERT(!IsPoisonedValue(v));
post(obj, slot);
}
inline
HeapSlot::HeapSlot(JSObject *obj, uint32_t slot, const HeapSlot &s)
: EncapsulatedValue(s.value)
{
JS_ASSERT(!IsPoisonedValue(s.value));
post(obj, slot);
}
inline
HeapSlot::~HeapSlot()
{
pre();
}
inline void
HeapSlot::init(JSObject *obj, uint32_t slot, const Value &v)
{
value = v;
post(obj, slot);
}
inline void
HeapSlot::init(JSCompartment *comp, JSObject *obj, uint32_t slot, const Value &v)
{
value = v;
post(comp, obj, slot);
}
inline void
HeapSlot::set(JSObject *obj, uint32_t slot, const Value &v)
{
JS_ASSERT_IF(!obj->isArray(), &obj->getSlotRef(slot) == this);
JS_ASSERT_IF(obj->isDenseArray(), &obj->getDenseArrayElement(slot) == (const Value *)this);
pre();
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post(obj, slot);
}
inline void
HeapSlot::set(JSCompartment *comp, JSObject *obj, uint32_t slot, const Value &v)
{
JS_ASSERT_IF(!obj->isArray(), &const_cast<JSObject *>(obj)->getSlotRef(slot) == this);
JS_ASSERT_IF(obj->isDenseArray(), &obj->getDenseArrayElement(slot) == (const Value *)this);
JS_ASSERT(obj->compartment() == comp);
pre(comp);
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post(comp, obj, slot);
}
inline void
HeapSlot::setCrossCompartment(JSObject *obj, uint32_t slot, const Value &v, JSCompartment *vcomp)
{
JS_ASSERT_IF(!obj->isArray(), &const_cast<JSObject *>(obj)->getSlotRef(slot) == this);
JS_ASSERT_IF(obj->isDenseArray(), &obj->getDenseArrayElement(slot) == (const Value *)this);
pre();
JS_ASSERT(!IsPoisonedValue(v));
value = v;
post(vcomp, obj, slot);
}
inline void
HeapSlot::writeBarrierPost(JSObject *obj, uint32_t slot)
{
#ifdef JSGC_GENERATIONAL
obj->compartment()->gcStoreBuffer.putSlot(obj, slot);
#endif
}
inline void
HeapSlot::writeBarrierPost(JSCompartment *comp, JSObject *obj, uint32_t slot)
{
#ifdef JSGC_GENERATIONAL
comp->gcStoreBuffer.putSlot(obj, slot);
#endif
}
inline void
HeapSlot::post(JSObject *owner, uint32_t slot)
{
HeapSlot::writeBarrierPost(owner, slot);
}
inline void
HeapSlot::post(JSCompartment *comp, JSObject *owner, uint32_t slot)
{
HeapSlot::writeBarrierPost(comp, owner, slot);
}
#ifdef JSGC_GENERATIONAL
class SlotRangeRef : public gc::BufferableRef
{
JSObject *owner;
uint32_t start;
uint32_t end;
public:
SlotRangeRef(JSObject *obj, uint32_t start, uint32_t end)
: owner(obj), start(start), end(end)
{
JS_ASSERT(start < end);
}
bool match(void *location) {
if (owner->isDenseArray()) {
uint32_t len = owner->getDenseArrayInitializedLength();
for (uint32_t i = Min(start, len); i < Min(end, len); ++i) {
if (&owner->getDenseArrayElement(i) == location)
return true;
}
return false;
}
uint32_t span = owner->slotSpan();
for (uint32_t i = Min(start, span); i < Min(end, span); ++i) {
if (owner->getSlotAddress(i) == location)
return true;
}
return false;
}
void mark(JSTracer *trc) {
/* Apply forwarding, if we have already visited owner. */
IsObjectMarked(&owner);
if (owner->isDenseArray()) {
uint32_t initLen = owner->getDenseArrayInitializedLength();
uint32_t clampedStart = Min(start, initLen);
gc::MarkArraySlots(trc, Min(end, initLen) - clampedStart,
owner->getDenseArrayElements() + clampedStart, "element");
return;
}
uint32_t span = owner->slotSpan();
uint32_t clampedStart = Min(start, span);
MarkObjectSlots(trc, owner, clampedStart, Min(end, span) - clampedStart);
}
};
#endif
inline void
SlotRangeWriteBarrierPost(JSCompartment *comp, JSObject *obj, uint32_t start, uint32_t count)
{
#ifdef JSGC_GENERATIONAL
if (count > 0)
comp->gcStoreBuffer.putGeneric(SlotRangeRef(obj, start, start + count));
#endif
}
inline
EncapsulatedId::~EncapsulatedId()
{
pre();
}
inline EncapsulatedId &
EncapsulatedId::operator=(const EncapsulatedId &v)
{
if (v.value != value)
pre();
JS_ASSERT(!IsPoisonedId(v.value));
value = v.value;
return *this;
}
inline void
EncapsulatedId::pre()
{
#ifdef JSGC_INCREMENTAL
if (JSID_IS_OBJECT(value)) {
JSObject *obj = JSID_TO_OBJECT(value);
JSCompartment *comp = obj->compartment();
if (comp->needsBarrier()) {
js::gc::MarkObjectUnbarriered(comp->barrierTracer(), &obj, "write barrier");
JS_ASSERT(obj == JSID_TO_OBJECT(value));
}
} else if (JSID_IS_STRING(value)) {
JSString *str = JSID_TO_STRING(value);
JSCompartment *comp = str->compartment();
if (comp->needsBarrier()) {
js::gc::MarkStringUnbarriered(comp->barrierTracer(), &str, "write barrier");
JS_ASSERT(str == JSID_TO_STRING(value));
}
}
#endif
}
inline
RelocatableId::~RelocatableId()
{
pre();
}
inline RelocatableId &
RelocatableId::operator=(jsid id)
{
if (id != value)
pre();
JS_ASSERT(!IsPoisonedId(id));
value = id;
return *this;
}
inline RelocatableId &
RelocatableId::operator=(const RelocatableId &v)
{
if (v.value != value)
pre();
JS_ASSERT(!IsPoisonedId(v.value));
value = v.value;
return *this;
}
inline
HeapId::HeapId(jsid id)
: EncapsulatedId(id)
{
JS_ASSERT(!IsPoisonedId(id));
post();
}
inline
HeapId::~HeapId()
{
pre();
}
inline void
HeapId::init(jsid id)
{
JS_ASSERT(!IsPoisonedId(id));
value = id;
post();
}
inline void
HeapId::post()
{
}
inline HeapId &
HeapId::operator=(jsid id)
{
if (id != value)
pre();
JS_ASSERT(!IsPoisonedId(id));
value = id;
post();
return *this;
}
inline HeapId &
HeapId::operator=(const HeapId &v)
{
if (v.value != value)
pre();
JS_ASSERT(!IsPoisonedId(v.value));
value = v.value;
post();
return *this;
}
inline const Value &
ReadBarrieredValue::get() const
{
if (value.isObject())
JSObject::readBarrier(&value.toObject());
else if (value.isString())
JSString::readBarrier(value.toString());
else
JS_ASSERT(!value.isMarkable());
return value;
}
inline
ReadBarrieredValue::operator const Value &() const
{
return get();
}
inline JSObject &
ReadBarrieredValue::toObject() const
{
return get().toObject();
}
} /* namespace js */
#endif /* jsgc_barrier_inl_h___ */