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js/src/gc/GCInternals.h@129ffea94266 (annotated)

js/src/gc/GCInternals.h

Sat, 03 Jan 2015 20:18:00 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Sat, 03 Jan 2015 20:18:00 +0100

branch

TOR_BUG_3246

changeset 7

129ffea94266

permissions

-rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

michael@0	1	/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0	2	* vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0	3	* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#ifndef gc_GCInternals_h
michael@0	8	#define gc_GCInternals_h
michael@0	9
michael@0	10	#include "jscntxt.h"
michael@0	11	#include "jsworkers.h"
michael@0	12
michael@0	13	#include "gc/Zone.h"
michael@0	14	#include "vm/Runtime.h"
michael@0	15
michael@0	16	namespace js {
michael@0	17	namespace gc {
michael@0	18
michael@0	19	void
michael@0	20	MarkPersistentRootedChains(JSTracer *trc);
michael@0	21
michael@0	22	void
michael@0	23	MarkRuntime(JSTracer *trc, bool useSavedRoots = false);
michael@0	24
michael@0	25	void
michael@0	26	BufferGrayRoots(GCMarker *gcmarker);
michael@0	27
michael@0	28	class AutoCopyFreeListToArenas
michael@0	29	{
michael@0	30	JSRuntime *runtime;
michael@0	31	ZoneSelector selector;
michael@0	32
michael@0	33	public:
michael@0	34	AutoCopyFreeListToArenas(JSRuntime *rt, ZoneSelector selector);
michael@0	35	~AutoCopyFreeListToArenas();
michael@0	36	};
michael@0	37
michael@0	38	struct AutoFinishGC
michael@0	39	{
michael@0	40	AutoFinishGC(JSRuntime *rt);
michael@0	41	};
michael@0	42
michael@0	43	/*
michael@0	44	* This class should be used by any code that needs to exclusive access to the
michael@0	45	* heap in order to trace through it...
michael@0	46	*/
michael@0	47	class AutoTraceSession
michael@0	48	{
michael@0	49	public:
michael@0	50	AutoTraceSession(JSRuntime *rt, HeapState state = Tracing);
michael@0	51	~AutoTraceSession();
michael@0	52
michael@0	53	protected:
michael@0	54	AutoLockForExclusiveAccess lock;
michael@0	55	JSRuntime *runtime;
michael@0	56
michael@0	57	private:
michael@0	58	AutoTraceSession(const AutoTraceSession&) MOZ_DELETE;
michael@0	59	void operator=(const AutoTraceSession&) MOZ_DELETE;
michael@0	60
michael@0	61	HeapState prevState;
michael@0	62	};
michael@0	63
michael@0	64	struct AutoPrepareForTracing
michael@0	65	{
michael@0	66	AutoFinishGC finish;
michael@0	67	AutoTraceSession session;
michael@0	68	AutoCopyFreeListToArenas copy;
michael@0	69
michael@0	70	AutoPrepareForTracing(JSRuntime *rt, ZoneSelector selector);
michael@0	71	};
michael@0	72
michael@0	73	class IncrementalSafety
michael@0	74	{
michael@0	75	const char *reason_;
michael@0	76
michael@0	77	IncrementalSafety(const char *reason) : reason_(reason) {}
michael@0	78
michael@0	79	public:
michael@0	80	static IncrementalSafety Safe() { return IncrementalSafety(nullptr); }
michael@0	81	static IncrementalSafety Unsafe(const char *reason) { return IncrementalSafety(reason); }
michael@0	82
michael@0	83	typedef void (IncrementalSafety::* ConvertibleToBool)();
michael@0	84	void nonNull() {}
michael@0	85
michael@0	86	operator ConvertibleToBool() const {
michael@0	87	return reason_ == nullptr ? &IncrementalSafety::nonNull : 0;
michael@0	88	}
michael@0	89
michael@0	90	const char *reason() {
michael@0	91	JS_ASSERT(reason_);
michael@0	92	return reason_;
michael@0	93	}
michael@0	94	};
michael@0	95
michael@0	96	IncrementalSafety
michael@0	97	IsIncrementalGCSafe(JSRuntime *rt);
michael@0	98
michael@0	99	#ifdef JS_GC_ZEAL
michael@0	100	void
michael@0	101	StartVerifyPreBarriers(JSRuntime *rt);
michael@0	102
michael@0	103	void
michael@0	104	EndVerifyPreBarriers(JSRuntime *rt);
michael@0	105
michael@0	106	void
michael@0	107	StartVerifyPostBarriers(JSRuntime *rt);
michael@0	108
michael@0	109	void
michael@0	110	EndVerifyPostBarriers(JSRuntime *rt);
michael@0	111
michael@0	112	void
michael@0	113	FinishVerifier(JSRuntime *rt);
michael@0	114
michael@0	115	class AutoStopVerifyingBarriers
michael@0	116	{
michael@0	117	JSRuntime *runtime;
michael@0	118	bool restartPreVerifier;
michael@0	119	bool restartPostVerifier;
michael@0	120	MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
michael@0	121
michael@0	122	public:
michael@0	123	AutoStopVerifyingBarriers(JSRuntime *rt, bool isShutdown
michael@0	124	MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
michael@0	125	: runtime(rt)
michael@0	126	{
michael@0	127	restartPreVerifier = !isShutdown && rt->gcVerifyPreData;
michael@0	128	restartPostVerifier = !isShutdown && rt->gcVerifyPostData && JS::IsGenerationalGCEnabled(rt);
michael@0	129	if (rt->gcVerifyPreData)
michael@0	130	EndVerifyPreBarriers(rt);
michael@0	131	if (rt->gcVerifyPostData)
michael@0	132	EndVerifyPostBarriers(rt);
michael@0	133	MOZ_GUARD_OBJECT_NOTIFIER_INIT;
michael@0	134	}
michael@0	135
michael@0	136	~AutoStopVerifyingBarriers() {
michael@0	137	if (restartPreVerifier)
michael@0	138	StartVerifyPreBarriers(runtime);
michael@0	139	if (restartPostVerifier)
michael@0	140	StartVerifyPostBarriers(runtime);
michael@0	141	}
michael@0	142	};
michael@0	143	#else
michael@0	144	struct AutoStopVerifyingBarriers
michael@0	145	{
michael@0	146	AutoStopVerifyingBarriers(JSRuntime *, bool) {}
michael@0	147	};
michael@0	148	#endif /* JS_GC_ZEAL */
michael@0	149
michael@0	150	} /* namespace gc */
michael@0	151	} /* namespace js */
michael@0	152
michael@0	153	#endif /* gc_GCInternals_h */