js/src/jit/Invalidation.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   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 #ifndef jit_Invalidation_h
   8 #define jit_Invalidation_h
   9
  10 #include "jit/IonTypes.h"
  11 #include "js/AllocPolicy.h"
  12 #include "js/GCVector.h"
  13
  14 namespace js {
  15 namespace jit {
  16
  17 class IonScript;
  18
  19 class RecompileInfo {
  20   JSScript* script_;
  21   IonCompilationId id_;
  22
  23  public:
  24   RecompileInfo(JSScript* script, IonCompilationId id)
  25       : script_(script), id_(id) {}
  26
  27   JSScript* script() const { return script_; }
  28
  29   IonScript* maybeIonScriptToInvalidate() const;
  30
  31   bool traceWeak(JSTracer* trc);
  32
  33   bool operator==(const RecompileInfo& other) const {
  34     return script_ == other.script_ && id_ == other.id_;
  35   }
  36 };
  37
  38 // The RecompileInfoVector has a MinInlineCapacity of one so that invalidating a
  39 // single IonScript doesn't require an allocation.
  40 using RecompileInfoVector = JS::GCVector<RecompileInfo, 1, SystemAllocPolicy>;
  41
  42 // Called from Zone::discardJitCode().
  43 void InvalidateAll(JS::GCContext* gcx, JS::Zone* zone);
  44 void FinishInvalidation(JS::GCContext* gcx, JSScript* script);
  45
  46 // Add compilations involving |script| (outer script or inlined) to the vector.
  47 void AddPendingInvalidation(jit::RecompileInfoVector& invalid,
  48                             JSScript* script);
  49
  50 // Walk the stack and invalidate active Ion frames for the invalid scripts.
  51 void Invalidate(JSContext* cx, const RecompileInfoVector& invalid,
  52                 bool resetUses = true, bool cancelOffThread = true);
  53 void Invalidate(JSContext* cx, JSScript* script, bool resetUses = true,
  54                 bool cancelOffThread = true);
  55
  56 }  // namespace jit
  57 }  // namespace js
  58
  59 #endif /* jit_Invalidation_h */