1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit/Ion.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,200 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef jit_Ion_h
1.11 +#define jit_Ion_h
1.12 +
1.13 +#ifdef JS_ION
1.14 +
1.15 +#include "mozilla/MemoryReporting.h"
1.16 +
1.17 +#include "jscntxt.h"
1.18 +#include "jscompartment.h"
1.19 +
1.20 +#include "jit/CompileInfo.h"
1.21 +#include "jit/CompileWrappers.h"
1.22 +#include "jit/JitOptions.h"
1.23 +
1.24 +namespace js {
1.25 +namespace jit {
1.26 +
1.27 +class TempAllocator;
1.28 +
1.29 +enum MethodStatus
1.30 +{
1.31 + Method_Error,
1.32 + Method_CantCompile,
1.33 + Method_Skipped,
1.34 + Method_Compiled
1.35 +};
1.36 +
1.37 +enum AbortReason {
1.38 + AbortReason_Alloc,
1.39 + AbortReason_Inlining,
1.40 + AbortReason_Disable,
1.41 + AbortReason_Error,
1.42 + AbortReason_NoAbort
1.43 +};
1.44 +
1.45 +// An Ion context is needed to enter into either an Ion method or an instance
1.46 +// of the Ion compiler. It points to a temporary allocator and the active
1.47 +// JSContext, either of which may be nullptr, and the active compartment, which
1.48 +// will not be nullptr.
1.49 +
1.50 +class IonContext
1.51 +{
1.52 + public:
1.53 + IonContext(JSContext *cx, TempAllocator *temp);
1.54 + IonContext(ExclusiveContext *cx, TempAllocator *temp);
1.55 + IonContext(CompileRuntime *rt, CompileCompartment *comp, TempAllocator *temp);
1.56 + IonContext(CompileRuntime *rt);
1.57 + ~IonContext();
1.58 +
1.59 + // Running context when executing on the main thread. Not available during
1.60 + // compilation.
1.61 + JSContext *cx;
1.62 +
1.63 + // Allocator for temporary memory during compilation.
1.64 + TempAllocator *temp;
1.65 +
1.66 + // Wrappers with information about the current runtime/compartment for use
1.67 + // during compilation.
1.68 + CompileRuntime *runtime;
1.69 + CompileCompartment *compartment;
1.70 +
1.71 + int getNextAssemblerId() {
1.72 + return assemblerCount_++;
1.73 + }
1.74 + private:
1.75 + IonContext *prev_;
1.76 + int assemblerCount_;
1.77 +};
1.78 +
1.79 +// Initialize Ion statically for all JSRuntimes.
1.80 +bool InitializeIon();
1.81 +
1.82 +// Get and set the current Ion context.
1.83 +IonContext *GetIonContext();
1.84 +IonContext *MaybeGetIonContext();
1.85 +
1.86 +void SetIonContext(IonContext *ctx);
1.87 +
1.88 +bool CanIonCompileScript(JSContext *cx, JSScript *script, bool osr);
1.89 +
1.90 +MethodStatus CanEnterAtBranch(JSContext *cx, JSScript *script,
1.91 + BaselineFrame *frame, jsbytecode *pc, bool isConstructing);
1.92 +MethodStatus CanEnter(JSContext *cx, RunState &state);
1.93 +MethodStatus CompileFunctionForBaseline(JSContext *cx, HandleScript script, BaselineFrame *frame,
1.94 + bool isConstructing);
1.95 +MethodStatus CanEnterUsingFastInvoke(JSContext *cx, HandleScript script, uint32_t numActualArgs);
1.96 +
1.97 +MethodStatus CanEnterInParallel(JSContext *cx, HandleScript script);
1.98 +
1.99 +MethodStatus
1.100 +Recompile(JSContext *cx, HandleScript script, BaselineFrame *osrFrame, jsbytecode *osrPc,
1.101 + bool constructing);
1.102 +
1.103 +enum IonExecStatus
1.104 +{
1.105 + // The method call had to be aborted due to a stack limit check. This
1.106 + // error indicates that Ion never attempted to clean up frames.
1.107 + IonExec_Aborted,
1.108 +
1.109 + // The method call resulted in an error, and IonMonkey has cleaned up
1.110 + // frames.
1.111 + IonExec_Error,
1.112 +
1.113 + // The method call succeeed and returned a value.
1.114 + IonExec_Ok
1.115 +};
1.116 +
1.117 +static inline bool
1.118 +IsErrorStatus(IonExecStatus status)
1.119 +{
1.120 + return status == IonExec_Error || status == IonExec_Aborted;
1.121 +}
1.122 +
1.123 +struct EnterJitData;
1.124 +
1.125 +bool SetEnterJitData(JSContext *cx, EnterJitData &data, RunState &state, AutoValueVector &vals);
1.126 +
1.127 +IonExecStatus IonCannon(JSContext *cx, RunState &state);
1.128 +
1.129 +// Used to enter Ion from C++ natives like Array.map. Called from FastInvokeGuard.
1.130 +IonExecStatus FastInvoke(JSContext *cx, HandleFunction fun, CallArgs &args);
1.131 +
1.132 +// Walk the stack and invalidate active Ion frames for the invalid scripts.
1.133 +void Invalidate(types::TypeZone &types, FreeOp *fop,
1.134 + const Vector<types::RecompileInfo> &invalid, bool resetUses = true,
1.135 + bool cancelOffThread = true);
1.136 +void Invalidate(JSContext *cx, const Vector<types::RecompileInfo> &invalid, bool resetUses = true,
1.137 + bool cancelOffThread = true);
1.138 +bool Invalidate(JSContext *cx, JSScript *script, ExecutionMode mode, bool resetUses = true,
1.139 + bool cancelOffThread = true);
1.140 +bool Invalidate(JSContext *cx, JSScript *script, bool resetUses = true,
1.141 + bool cancelOffThread = true);
1.142 +
1.143 +void MarkValueFromIon(JSRuntime *rt, Value *vp);
1.144 +void MarkShapeFromIon(JSRuntime *rt, Shape **shapep);
1.145 +
1.146 +void ToggleBarriers(JS::Zone *zone, bool needs);
1.147 +
1.148 +class IonBuilder;
1.149 +class MIRGenerator;
1.150 +class LIRGraph;
1.151 +class CodeGenerator;
1.152 +
1.153 +bool OptimizeMIR(MIRGenerator *mir);
1.154 +LIRGraph *GenerateLIR(MIRGenerator *mir);
1.155 +CodeGenerator *GenerateCode(MIRGenerator *mir, LIRGraph *lir);
1.156 +CodeGenerator *CompileBackEnd(MIRGenerator *mir);
1.157 +
1.158 +void AttachFinishedCompilations(JSContext *cx);
1.159 +void FinishOffThreadBuilder(IonBuilder *builder);
1.160 +void StopAllOffThreadCompilations(JSCompartment *comp);
1.161 +
1.162 +static inline bool
1.163 +IsIonEnabled(JSContext *cx)
1.164 +{
1.165 + return cx->runtime()->options().ion() &&
1.166 + cx->runtime()->options().baseline() &&
1.167 + cx->runtime()->jitSupportsFloatingPoint;
1.168 +}
1.169 +
1.170 +inline bool
1.171 +IsIonInlinablePC(jsbytecode *pc) {
1.172 + // CALL, FUNCALL, FUNAPPLY, EVAL, NEW (Normal Callsites)
1.173 + // GETPROP, CALLPROP, and LENGTH. (Inlined Getters)
1.174 + // SETPROP, SETNAME, SETGNAME (Inlined Setters)
1.175 + return IsCallPC(pc) || IsGetPropPC(pc) || IsSetPropPC(pc);
1.176 +}
1.177 +
1.178 +inline bool
1.179 +TooManyArguments(unsigned nargs)
1.180 +{
1.181 + return nargs >= SNAPSHOT_MAX_NARGS || nargs > js_JitOptions.maxStackArgs;
1.182 +}
1.183 +
1.184 +void ForbidCompilation(JSContext *cx, JSScript *script);
1.185 +void ForbidCompilation(JSContext *cx, JSScript *script, ExecutionMode mode);
1.186 +
1.187 +void PurgeCaches(JSScript *script);
1.188 +size_t SizeOfIonData(JSScript *script, mozilla::MallocSizeOf mallocSizeOf);
1.189 +void DestroyIonScripts(FreeOp *fop, JSScript *script);
1.190 +void TraceIonScripts(JSTracer* trc, JSScript *script);
1.191 +
1.192 +void RequestInterruptForIonCode(JSRuntime *rt, JSRuntime::InterruptMode mode);
1.193 +
1.194 +bool RematerializeAllFrames(JSContext *cx, JSCompartment *comp);
1.195 +bool UpdateForDebugMode(JSContext *maybecx, JSCompartment *comp,
1.196 + AutoDebugModeInvalidation &invalidate);
1.197 +
1.198 +} // namespace jit
1.199 +} // namespace js
1.200 +
1.201 +#endif // JS_ION
1.202 +
1.203 +#endif /* jit_Ion_h */
