/* 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 jit_WarpOracle_h
#define jit_WarpOracle_h
#include "jit/JitAllocPolicy.h"
#include "jit/JitContext.h"
#include "jit/WarpSnapshot.h"
namespace js {
class ObjectFuse;
namespace jit {
class MIRGenerator;
struct ObjectFuseInfo {
ObjectFuse* fuse;
uint32_t generation;
uint32_t propSlot;
};
// WarpOracle creates a WarpSnapshot data structure that's used by WarpBuilder
// to generate the MIR graph off-thread.
class MOZ_STACK_CLASS WarpOracle {
JSContext* cx_;
MIRGenerator& mirGen_;
TempAllocator& alloc_;
HandleScript outerScript_;
WarpBailoutInfo bailoutInfo_;
WarpScriptSnapshotList scriptSnapshots_;
WarpZoneStubsSnapshot zoneStubs_{};
size_t accumulatedBytecodeSize_ =
0;
#ifdef DEBUG
mozilla::HashNumber runningScriptHash_ =
0;
#endif
// List of nursery objects to copy to the snapshot. See WarpObjectField.
// The HashMap is used to de-duplicate the Vector. It maps each object to the
// corresponding nursery index (index into the Vector).
// Note: this stores raw object pointers because WarpOracle can't GC.
Vector<JSObject*,
8, SystemAllocPolicy> nurseryObjects_;
using NurseryObjectsMap =
HashMap<JSObject*, uint32_t, DefaultHasher<JSObject*>, SystemAllocPolicy>;
NurseryObjectsMap nurseryObjectsMap_;
// Like nurseryObjects_/nurseryObjectsMap_ but for boxed Values.
// Use mozilla::Vector because js::Vector asserts it's not used for JS::Value.
mozilla::Vector<Value,
8, SystemAllocPolicy> nurseryValues_;
using NurseryValuesMap =
HashMap<gc::Cell*, uint32_t, DefaultHasher<gc::Cell*>, SystemAllocPolicy>;
NurseryValuesMap nurseryValuesMap_;
public:
WarpOracle(JSContext* cx, MIRGenerator& mirGen, HandleScript outerScript);
~WarpOracle() { scriptSnapshots_.clear(); }
MIRGenerator& mirGen() {
return mirGen_; }
WarpBailoutInfo& bailoutInfo() {
return bailoutInfo_; }
[[nodiscard]]
bool registerNurseryObject(JSObject* obj,
uint32_t* nurseryIndex);
[[nodiscard]]
bool registerNurseryValue(Value v, uint32_t* nurseryIndex);
[[nodiscard]]
bool snapshotJitZoneStub(JitZone::StubKind kind);
[[nodiscard]]
bool addFuseDependency(RealmFuses::FuseIndex fuseIndex);
[[nodiscard]]
bool addFuseDependency(RuntimeFuses::FuseIndex fuseIndex);
[[nodiscard]]
bool addFuseDependency(
const ObjectFuseInfo& info);
AbortReasonOr<WarpSnapshot*> createSnapshot();
mozilla::GenericErrorResult<AbortReason> abort(HandleScript script,
AbortReason r);
mozilla::GenericErrorResult<AbortReason> abort(HandleScript script,
AbortReason r,
const char* message, ...);
void addScriptSnapshot(WarpScriptSnapshot* scriptSnapshot, ICScript* icScript,
size_t bytecodeLength);
size_t accumulatedBytecodeSize() {
return accumulatedBytecodeSize_; }
void ignoreFailedICHash();
};
}
// namespace jit
}
// namespace js
#endif /* jit_WarpOracle_h */