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comparison: js/src/jit/RematerializedFrame.h
js/src/jit/RematerializedFrame.h
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- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:fd5304274ce1 |
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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_RematerializedFrame_h | |
| 8 #define jit_RematerializedFrame_h | |
| 9 | |
| 10 #ifdef JS_ION | |
| 11 | |
| 12 #include "jsfun.h" | |
| 13 | |
| 14 #include "jit/JitFrameIterator.h" | |
| 15 | |
| 16 #include "vm/Stack.h" | |
| 17 | |
| 18 namespace js { | |
| 19 namespace jit { | |
| 20 | |
| 21 // | |
| 22 // An optimized frame that has been rematerialized with values read out of | |
| 23 // Snapshots. | |
| 24 // | |
| 25 class RematerializedFrame | |
| 26 { | |
| 27 // See DebugScopes::updateLiveScopes. | |
| 28 bool prevUpToDate_; | |
| 29 | |
| 30 // The fp of the top frame associated with this possibly inlined frame. | |
| 31 uint8_t *top_; | |
| 32 | |
| 33 size_t frameNo_; | |
| 34 unsigned numActualArgs_; | |
| 35 | |
| 36 JSScript *script_; | |
| 37 JSObject *scopeChain_; | |
| 38 ArgumentsObject *argsObj_; | |
| 39 | |
| 40 Value returnValue_; | |
| 41 Value thisValue_; | |
| 42 Value slots_[1]; | |
| 43 | |
| 44 RematerializedFrame(JSContext *cx, uint8_t *top, InlineFrameIterator &iter); | |
| 45 | |
| 46 public: | |
| 47 static RematerializedFrame *New(JSContext *cx, uint8_t *top, InlineFrameIterator &iter); | |
| 48 | |
| 49 bool prevUpToDate() const { | |
| 50 return prevUpToDate_; | |
| 51 } | |
| 52 void setPrevUpToDate() { | |
| 53 prevUpToDate_ = true; | |
| 54 } | |
| 55 | |
| 56 uint8_t *top() const { | |
| 57 return top_; | |
| 58 } | |
| 59 size_t frameNo() const { | |
| 60 return frameNo_; | |
| 61 } | |
| 62 bool inlined() const { | |
| 63 return frameNo_ > 0; | |
| 64 } | |
| 65 | |
| 66 JSObject *scopeChain() const { | |
| 67 return scopeChain_; | |
| 68 } | |
| 69 bool hasCallObj() const { | |
| 70 return maybeFun() && fun()->isHeavyweight(); | |
| 71 } | |
| 72 CallObject &callObj() const; | |
| 73 | |
| 74 bool hasArgsObj() const { | |
| 75 return !!argsObj_; | |
| 76 } | |
| 77 ArgumentsObject &argsObj() const { | |
| 78 MOZ_ASSERT(hasArgsObj()); | |
| 79 MOZ_ASSERT(script()->needsArgsObj()); | |
| 80 return *argsObj_; | |
| 81 } | |
| 82 | |
| 83 bool isFunctionFrame() const { | |
| 84 return !!script_->functionNonDelazifying(); | |
| 85 } | |
| 86 bool isGlobalFrame() const { | |
| 87 return !isFunctionFrame(); | |
| 88 } | |
| 89 bool isNonEvalFunctionFrame() const { | |
| 90 // Ion doesn't support eval frames. | |
| 91 return isFunctionFrame(); | |
| 92 } | |
| 93 | |
| 94 JSScript *script() const { | |
| 95 return script_; | |
| 96 } | |
| 97 JSFunction *fun() const { | |
| 98 MOZ_ASSERT(isFunctionFrame()); | |
| 99 return script_->functionNonDelazifying(); | |
| 100 } | |
| 101 JSFunction *maybeFun() const { | |
| 102 return isFunctionFrame() ? fun() : nullptr; | |
| 103 } | |
| 104 JSFunction *callee() const { | |
| 105 return fun(); | |
| 106 } | |
| 107 Value calleev() const { | |
| 108 return ObjectValue(*fun()); | |
| 109 } | |
| 110 Value &thisValue() { | |
| 111 return thisValue_; | |
| 112 } | |
| 113 | |
| 114 unsigned numFormalArgs() const { | |
| 115 return maybeFun() ? fun()->nargs() : 0; | |
| 116 } | |
| 117 unsigned numActualArgs() const { | |
| 118 return numActualArgs_; | |
| 119 } | |
| 120 | |
| 121 Value *argv() { | |
| 122 return slots_; | |
| 123 } | |
| 124 Value *locals() { | |
| 125 return slots_ + numActualArgs_; | |
| 126 } | |
| 127 | |
| 128 Value &unaliasedVar(unsigned i, MaybeCheckAliasing checkAliasing = CHECK_ALIASING) { | |
| 129 JS_ASSERT_IF(checkAliasing, !script()->varIsAliased(i)); | |
| 130 JS_ASSERT(i < script()->nfixed()); | |
| 131 return locals()[i]; | |
| 132 } | |
| 133 Value &unaliasedLocal(unsigned i, MaybeCheckAliasing checkAliasing = CHECK_ALIASING) { | |
| 134 JS_ASSERT(i < script()->nfixed()); | |
| 135 #ifdef DEBUG | |
| 136 CheckLocalUnaliased(checkAliasing, script(), i); | |
| 137 #endif | |
| 138 return locals()[i]; | |
| 139 } | |
| 140 Value &unaliasedFormal(unsigned i, MaybeCheckAliasing checkAliasing = CHECK_ALIASING) { | |
| 141 JS_ASSERT(i < numFormalArgs()); | |
| 142 JS_ASSERT_IF(checkAliasing, !script()->argsObjAliasesFormals() && | |
| 143 !script()->formalIsAliased(i)); | |
| 144 return argv()[i]; | |
| 145 } | |
| 146 Value &unaliasedActual(unsigned i, MaybeCheckAliasing checkAliasing = CHECK_ALIASING) { | |
| 147 JS_ASSERT(i < numActualArgs()); | |
| 148 JS_ASSERT_IF(checkAliasing, !script()->argsObjAliasesFormals()); | |
| 149 JS_ASSERT_IF(checkAliasing && i < numFormalArgs(), !script()->formalIsAliased(i)); | |
| 150 return argv()[i]; | |
| 151 } | |
| 152 | |
| 153 Value returnValue() const { | |
| 154 return returnValue_; | |
| 155 } | |
| 156 | |
| 157 void mark(JSTracer *trc); | |
| 158 void dump(); | |
| 159 }; | |
| 160 | |
| 161 } // namespace jit | |
| 162 } // namespace js | |
| 163 | |
| 164 #endif // JS_ION | |
| 165 #endif // jit_RematerializedFrame_h |
