The Tor Browser / file comparison
comparison: js/src/jit/Ion.h
js/src/jit/Ion.h
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- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:60bf441ec854 |
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| 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 #ifndef jit_Ion_h | |
| 8 #define jit_Ion_h | |
| 9 | |
| 10 #ifdef JS_ION | |
| 11 | |
| 12 #include "mozilla/MemoryReporting.h" | |
| 13 | |
| 14 #include "jscntxt.h" | |
| 15 #include "jscompartment.h" | |
| 16 | |
| 17 #include "jit/CompileInfo.h" | |
| 18 #include "jit/CompileWrappers.h" | |
| 19 #include "jit/JitOptions.h" | |
| 20 | |
| 21 namespace js { | |
| 22 namespace jit { | |
| 23 | |
| 24 class TempAllocator; | |
| 25 | |
| 26 enum MethodStatus | |
| 27 { | |
| 28 Method_Error, | |
| 29 Method_CantCompile, | |
| 30 Method_Skipped, | |
| 31 Method_Compiled | |
| 32 }; | |
| 33 | |
| 34 enum AbortReason { | |
| 35 AbortReason_Alloc, | |
| 36 AbortReason_Inlining, | |
| 37 AbortReason_Disable, | |
| 38 AbortReason_Error, | |
| 39 AbortReason_NoAbort | |
| 40 }; | |
| 41 | |
| 42 // An Ion context is needed to enter into either an Ion method or an instance | |
| 43 // of the Ion compiler. It points to a temporary allocator and the active | |
| 44 // JSContext, either of which may be nullptr, and the active compartment, which | |
| 45 // will not be nullptr. | |
| 46 | |
| 47 class IonContext | |
| 48 { | |
| 49 public: | |
| 50 IonContext(JSContext *cx, TempAllocator *temp); | |
| 51 IonContext(ExclusiveContext *cx, TempAllocator *temp); | |
| 52 IonContext(CompileRuntime *rt, CompileCompartment *comp, TempAllocator *temp); | |
| 53 IonContext(CompileRuntime *rt); | |
| 54 ~IonContext(); | |
| 55 | |
| 56 // Running context when executing on the main thread. Not available during | |
| 57 // compilation. | |
| 58 JSContext *cx; | |
| 59 | |
| 60 // Allocator for temporary memory during compilation. | |
| 61 TempAllocator *temp; | |
| 62 | |
| 63 // Wrappers with information about the current runtime/compartment for use | |
| 64 // during compilation. | |
| 65 CompileRuntime *runtime; | |
| 66 CompileCompartment *compartment; | |
| 67 | |
| 68 int getNextAssemblerId() { | |
| 69 return assemblerCount_++; | |
| 70 } | |
| 71 private: | |
| 72 IonContext *prev_; | |
| 73 int assemblerCount_; | |
| 74 }; | |
| 75 | |
| 76 // Initialize Ion statically for all JSRuntimes. | |
| 77 bool InitializeIon(); | |
| 78 | |
| 79 // Get and set the current Ion context. | |
| 80 IonContext *GetIonContext(); | |
| 81 IonContext *MaybeGetIonContext(); | |
| 82 | |
| 83 void SetIonContext(IonContext *ctx); | |
| 84 | |
| 85 bool CanIonCompileScript(JSContext *cx, JSScript *script, bool osr); | |
| 86 | |
| 87 MethodStatus CanEnterAtBranch(JSContext *cx, JSScript *script, | |
| 88 BaselineFrame *frame, jsbytecode *pc, bool isConstructing); | |
| 89 MethodStatus CanEnter(JSContext *cx, RunState &state); | |
| 90 MethodStatus CompileFunctionForBaseline(JSContext *cx, HandleScript script, BaselineFrame *frame, | |
| 91 bool isConstructing); | |
| 92 MethodStatus CanEnterUsingFastInvoke(JSContext *cx, HandleScript script, uint32_t numActualArgs); | |
| 93 | |
| 94 MethodStatus CanEnterInParallel(JSContext *cx, HandleScript script); | |
| 95 | |
| 96 MethodStatus | |
| 97 Recompile(JSContext *cx, HandleScript script, BaselineFrame *osrFrame, jsbytecode *osrPc, | |
| 98 bool constructing); | |
| 99 | |
| 100 enum IonExecStatus | |
| 101 { | |
| 102 // The method call had to be aborted due to a stack limit check. This | |
| 103 // error indicates that Ion never attempted to clean up frames. | |
| 104 IonExec_Aborted, | |
| 105 | |
| 106 // The method call resulted in an error, and IonMonkey has cleaned up | |
| 107 // frames. | |
| 108 IonExec_Error, | |
| 109 | |
| 110 // The method call succeeed and returned a value. | |
| 111 IonExec_Ok | |
| 112 }; | |
| 113 | |
| 114 static inline bool | |
| 115 IsErrorStatus(IonExecStatus status) | |
| 116 { | |
| 117 return status == IonExec_Error || status == IonExec_Aborted; | |
| 118 } | |
| 119 | |
| 120 struct EnterJitData; | |
| 121 | |
| 122 bool SetEnterJitData(JSContext *cx, EnterJitData &data, RunState &state, AutoValueVector &vals); | |
| 123 | |
| 124 IonExecStatus IonCannon(JSContext *cx, RunState &state); | |
| 125 | |
| 126 // Used to enter Ion from C++ natives like Array.map. Called from FastInvokeGuard. | |
| 127 IonExecStatus FastInvoke(JSContext *cx, HandleFunction fun, CallArgs &args); | |
| 128 | |
| 129 // Walk the stack and invalidate active Ion frames for the invalid scripts. | |
| 130 void Invalidate(types::TypeZone &types, FreeOp *fop, | |
| 131 const Vector<types::RecompileInfo> &invalid, bool resetUses = true, | |
| 132 bool cancelOffThread = true); | |
| 133 void Invalidate(JSContext *cx, const Vector<types::RecompileInfo> &invalid, bool resetUses = true, | |
| 134 bool cancelOffThread = true); | |
| 135 bool Invalidate(JSContext *cx, JSScript *script, ExecutionMode mode, bool resetUses = true, | |
| 136 bool cancelOffThread = true); | |
| 137 bool Invalidate(JSContext *cx, JSScript *script, bool resetUses = true, | |
| 138 bool cancelOffThread = true); | |
| 139 | |
| 140 void MarkValueFromIon(JSRuntime *rt, Value *vp); | |
| 141 void MarkShapeFromIon(JSRuntime *rt, Shape **shapep); | |
| 142 | |
| 143 void ToggleBarriers(JS::Zone *zone, bool needs); | |
| 144 | |
| 145 class IonBuilder; | |
| 146 class MIRGenerator; | |
| 147 class LIRGraph; | |
| 148 class CodeGenerator; | |
| 149 | |
| 150 bool OptimizeMIR(MIRGenerator *mir); | |
| 151 LIRGraph *GenerateLIR(MIRGenerator *mir); | |
| 152 CodeGenerator *GenerateCode(MIRGenerator *mir, LIRGraph *lir); | |
| 153 CodeGenerator *CompileBackEnd(MIRGenerator *mir); | |
| 154 | |
| 155 void AttachFinishedCompilations(JSContext *cx); | |
| 156 void FinishOffThreadBuilder(IonBuilder *builder); | |
| 157 void StopAllOffThreadCompilations(JSCompartment *comp); | |
| 158 | |
| 159 static inline bool | |
| 160 IsIonEnabled(JSContext *cx) | |
| 161 { | |
| 162 return cx->runtime()->options().ion() && | |
| 163 cx->runtime()->options().baseline() && | |
| 164 cx->runtime()->jitSupportsFloatingPoint; | |
| 165 } | |
| 166 | |
| 167 inline bool | |
| 168 IsIonInlinablePC(jsbytecode *pc) { | |
| 169 // CALL, FUNCALL, FUNAPPLY, EVAL, NEW (Normal Callsites) | |
| 170 // GETPROP, CALLPROP, and LENGTH. (Inlined Getters) | |
| 171 // SETPROP, SETNAME, SETGNAME (Inlined Setters) | |
| 172 return IsCallPC(pc) || IsGetPropPC(pc) || IsSetPropPC(pc); | |
| 173 } | |
| 174 | |
| 175 inline bool | |
| 176 TooManyArguments(unsigned nargs) | |
| 177 { | |
| 178 return nargs >= SNAPSHOT_MAX_NARGS || nargs > js_JitOptions.maxStackArgs; | |
| 179 } | |
| 180 | |
| 181 void ForbidCompilation(JSContext *cx, JSScript *script); | |
| 182 void ForbidCompilation(JSContext *cx, JSScript *script, ExecutionMode mode); | |
| 183 | |
| 184 void PurgeCaches(JSScript *script); | |
| 185 size_t SizeOfIonData(JSScript *script, mozilla::MallocSizeOf mallocSizeOf); | |
| 186 void DestroyIonScripts(FreeOp *fop, JSScript *script); | |
| 187 void TraceIonScripts(JSTracer* trc, JSScript *script); | |
| 188 | |
| 189 void RequestInterruptForIonCode(JSRuntime *rt, JSRuntime::InterruptMode mode); | |
| 190 | |
| 191 bool RematerializeAllFrames(JSContext *cx, JSCompartment *comp); | |
| 192 bool UpdateForDebugMode(JSContext *maybecx, JSCompartment *comp, | |
| 193 AutoDebugModeInvalidation &invalidate); | |
| 194 | |
| 195 } // namespace jit | |
| 196 } // namespace js | |
| 197 | |
| 198 #endif // JS_ION | |
| 199 | |
| 200 #endif /* jit_Ion_h */ |
