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comparison: js/src/gc/GCInternals.h
js/src/gc/GCInternals.h
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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 gc_GCInternals_h | |
| 8 #define gc_GCInternals_h | |
| 9 | |
| 10 #include "jscntxt.h" | |
| 11 #include "jsworkers.h" | |
| 12 | |
| 13 #include "gc/Zone.h" | |
| 14 #include "vm/Runtime.h" | |
| 15 | |
| 16 namespace js { | |
| 17 namespace gc { | |
| 18 | |
| 19 void | |
| 20 MarkPersistentRootedChains(JSTracer *trc); | |
| 21 | |
| 22 void | |
| 23 MarkRuntime(JSTracer *trc, bool useSavedRoots = false); | |
| 24 | |
| 25 void | |
| 26 BufferGrayRoots(GCMarker *gcmarker); | |
| 27 | |
| 28 class AutoCopyFreeListToArenas | |
| 29 { | |
| 30 JSRuntime *runtime; | |
| 31 ZoneSelector selector; | |
| 32 | |
| 33 public: | |
| 34 AutoCopyFreeListToArenas(JSRuntime *rt, ZoneSelector selector); | |
| 35 ~AutoCopyFreeListToArenas(); | |
| 36 }; | |
| 37 | |
| 38 struct AutoFinishGC | |
| 39 { | |
| 40 AutoFinishGC(JSRuntime *rt); | |
| 41 }; | |
| 42 | |
| 43 /* | |
| 44 * This class should be used by any code that needs to exclusive access to the | |
| 45 * heap in order to trace through it... | |
| 46 */ | |
| 47 class AutoTraceSession | |
| 48 { | |
| 49 public: | |
| 50 AutoTraceSession(JSRuntime *rt, HeapState state = Tracing); | |
| 51 ~AutoTraceSession(); | |
| 52 | |
| 53 protected: | |
| 54 AutoLockForExclusiveAccess lock; | |
| 55 JSRuntime *runtime; | |
| 56 | |
| 57 private: | |
| 58 AutoTraceSession(const AutoTraceSession&) MOZ_DELETE; | |
| 59 void operator=(const AutoTraceSession&) MOZ_DELETE; | |
| 60 | |
| 61 HeapState prevState; | |
| 62 }; | |
| 63 | |
| 64 struct AutoPrepareForTracing | |
| 65 { | |
| 66 AutoFinishGC finish; | |
| 67 AutoTraceSession session; | |
| 68 AutoCopyFreeListToArenas copy; | |
| 69 | |
| 70 AutoPrepareForTracing(JSRuntime *rt, ZoneSelector selector); | |
| 71 }; | |
| 72 | |
| 73 class IncrementalSafety | |
| 74 { | |
| 75 const char *reason_; | |
| 76 | |
| 77 IncrementalSafety(const char *reason) : reason_(reason) {} | |
| 78 | |
| 79 public: | |
| 80 static IncrementalSafety Safe() { return IncrementalSafety(nullptr); } | |
| 81 static IncrementalSafety Unsafe(const char *reason) { return IncrementalSafety(reason); } | |
| 82 | |
| 83 typedef void (IncrementalSafety::* ConvertibleToBool)(); | |
| 84 void nonNull() {} | |
| 85 | |
| 86 operator ConvertibleToBool() const { | |
| 87 return reason_ == nullptr ? &IncrementalSafety::nonNull : 0; | |
| 88 } | |
| 89 | |
| 90 const char *reason() { | |
| 91 JS_ASSERT(reason_); | |
| 92 return reason_; | |
| 93 } | |
| 94 }; | |
| 95 | |
| 96 IncrementalSafety | |
| 97 IsIncrementalGCSafe(JSRuntime *rt); | |
| 98 | |
| 99 #ifdef JS_GC_ZEAL | |
| 100 void | |
| 101 StartVerifyPreBarriers(JSRuntime *rt); | |
| 102 | |
| 103 void | |
| 104 EndVerifyPreBarriers(JSRuntime *rt); | |
| 105 | |
| 106 void | |
| 107 StartVerifyPostBarriers(JSRuntime *rt); | |
| 108 | |
| 109 void | |
| 110 EndVerifyPostBarriers(JSRuntime *rt); | |
| 111 | |
| 112 void | |
| 113 FinishVerifier(JSRuntime *rt); | |
| 114 | |
| 115 class AutoStopVerifyingBarriers | |
| 116 { | |
| 117 JSRuntime *runtime; | |
| 118 bool restartPreVerifier; | |
| 119 bool restartPostVerifier; | |
| 120 MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER | |
| 121 | |
| 122 public: | |
| 123 AutoStopVerifyingBarriers(JSRuntime *rt, bool isShutdown | |
| 124 MOZ_GUARD_OBJECT_NOTIFIER_PARAM) | |
| 125 : runtime(rt) | |
| 126 { | |
| 127 restartPreVerifier = !isShutdown && rt->gcVerifyPreData; | |
| 128 restartPostVerifier = !isShutdown && rt->gcVerifyPostData && JS::IsGenerationalGCEnabled(rt); | |
| 129 if (rt->gcVerifyPreData) | |
| 130 EndVerifyPreBarriers(rt); | |
| 131 if (rt->gcVerifyPostData) | |
| 132 EndVerifyPostBarriers(rt); | |
| 133 MOZ_GUARD_OBJECT_NOTIFIER_INIT; | |
| 134 } | |
| 135 | |
| 136 ~AutoStopVerifyingBarriers() { | |
| 137 if (restartPreVerifier) | |
| 138 StartVerifyPreBarriers(runtime); | |
| 139 if (restartPostVerifier) | |
| 140 StartVerifyPostBarriers(runtime); | |
| 141 } | |
| 142 }; | |
| 143 #else | |
| 144 struct AutoStopVerifyingBarriers | |
| 145 { | |
| 146 AutoStopVerifyingBarriers(JSRuntime *, bool) {} | |
| 147 }; | |
| 148 #endif /* JS_GC_ZEAL */ | |
| 149 | |
| 150 } /* namespace gc */ | |
| 151 } /* namespace js */ | |
| 152 | |
| 153 #endif /* gc_GCInternals_h */ |
