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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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
#ifndef jit_Invalidation_h
#define jit_Invalidation_h
#include "jit/IonTypes.h"
#include "js/AllocPolicy.h"
#include "js/GCVector.h"
namespace js {
namespace jit {
class IonScript;
// Used to reference a specific IonScript created for a JSScript, without
// keeping that IonScript alive. It can be swept (by traceWeak) when the
// JSScript no longer has an IonScript with the given IonCompilationId.
class IonScriptKey {
JSScript* script_;
IonCompilationId id_;
public:
IonScriptKey(JSScript* script, IonCompilationId id)
: script_(script), id_(id) {}
JSScript* script() const { return script_; }
// Returns nullptr if the script no longer has an IonScript with this
// IonCompilationId.
IonScript* maybeIonScriptToInvalidate() const;
bool traceWeak(JSTracer* trc);
bool operator==(const IonScriptKey& other) const {
return script_ == other.script_ && id_ == other.id_;
}
bool operator!=(const IonScriptKey& other) const {
return !operator==(other);
}
};
// IonScriptKeyVector has a MinInlineCapacity of one so that invalidating a
// single IonScript doesn't require an allocation.
using IonScriptKeyVector = JS::GCVector<IonScriptKey, 1, SystemAllocPolicy>;
// Called from Zone::discardJitCode().
void InvalidateAll(JS::GCContext* gcx, JS::Zone* zone);
void FinishInvalidation(JS::GCContext* gcx, JSScript* script);
// Add compilations involving |script| (outer script or inlined) to the vector.
void AddPendingInvalidation(jit::IonScriptKeyVector& invalid, JSScript* script);
// Walk the stack and invalidate active Ion frames for the invalid scripts.
void Invalidate(JSContext* cx, const IonScriptKeyVector& invalid,
bool resetUses = true, bool cancelOffThread = true);
void Invalidate(JSContext* cx, JSScript* script, bool resetUses = true,
bool cancelOffThread = true);
} // namespace jit
} // namespace js
#endif /* jit_Invalidation_h */