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376 lines
11 KiB
C++
376 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sw=4 et tw=99 ft=cpp:
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef js_MemoryMetrics_h
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#define js_MemoryMetrics_h
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// These declarations are not within jsapi.h because they are highly likely to
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// change in the future. Depend on them at your own risk.
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#include <string.h>
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#include "jsalloc.h"
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#include "jspubtd.h"
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#include "js/Utility.h"
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#include "js/Vector.h"
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namespace js {
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// In memory reporting, we have concept of "sundries", line items which are too
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// small to be worth reporting individually. Under some circumstances, a memory
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// reporter gets tossed into the sundries bucket if it's smaller than
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// MemoryReportingSundriesThreshold() bytes.
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//
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// We need to define this value here, rather than in the code which actually
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// generates the memory reports, because HugeStringInfo uses this value.
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JS_FRIEND_API(size_t) MemoryReportingSundriesThreshold();
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} // namespace js
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namespace JS {
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// Data for tracking analysis/inference memory usage.
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struct TypeInferenceSizes
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{
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TypeInferenceSizes()
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: scripts(0)
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, objects(0)
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, tables(0)
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, temporary(0)
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{}
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size_t scripts;
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size_t objects;
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size_t tables;
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size_t temporary;
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void add(TypeInferenceSizes &sizes) {
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this->scripts += sizes.scripts;
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this->objects += sizes.objects;
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this->tables += sizes.tables;
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this->temporary += sizes.temporary;
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}
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};
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// Holds data about a huge string (one which uses more HugeStringInfo::MinSize
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// bytes of memory), so we can report it individually.
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struct HugeStringInfo
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{
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HugeStringInfo()
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: length(0)
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, size(0)
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{
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memset(&buffer, 0, sizeof(buffer));
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}
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// A string needs to take up this many bytes of storage before we consider
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// it to be "huge".
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static size_t MinSize()
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{
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return js::MemoryReportingSundriesThreshold();
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}
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// A string's size in memory is not necessarily equal to twice its length
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// because the allocator and the JS engine both may round up.
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size_t length;
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size_t size;
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// We record the first 32 chars of the escaped string here. (We escape the
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// string so we can use a char[] instead of a jschar[] here.
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char buffer[32];
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};
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// These measurements relate directly to the JSRuntime, and not to
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// compartments within it.
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struct RuntimeSizes
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{
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RuntimeSizes()
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: object(0)
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, atomsTable(0)
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, contexts(0)
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, dtoa(0)
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, temporary(0)
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, jaegerCode(0)
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, ionCode(0)
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, regexpCode(0)
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, unusedCode(0)
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, stack(0)
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, gcMarker(0)
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, mathCache(0)
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, scriptFilenames(0)
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, scriptSources(0)
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{}
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size_t object;
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size_t atomsTable;
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size_t contexts;
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size_t dtoa;
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size_t temporary;
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size_t jaegerCode;
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size_t ionCode;
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size_t regexpCode;
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size_t unusedCode;
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size_t stack;
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size_t gcMarker;
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size_t mathCache;
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size_t scriptFilenames;
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size_t scriptSources;
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};
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struct CompartmentStats
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{
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CompartmentStats()
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: extra1(0)
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, extra2(0)
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, gcHeapArenaAdmin(0)
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, gcHeapUnusedGcThings(0)
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, gcHeapObjectsNonFunction(0)
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, gcHeapObjectsFunction(0)
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, gcHeapStrings(0)
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, gcHeapShapesTree(0)
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, gcHeapShapesDict(0)
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, gcHeapShapesBase(0)
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, gcHeapScripts(0)
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, gcHeapTypeObjects(0)
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, gcHeapIonCodes(0)
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#if JS_HAS_XML_SUPPORT
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, gcHeapXML(0)
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#endif
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, objectSlots(0)
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, objectElements(0)
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, objectMisc(0)
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, objectPrivate(0)
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, nonHugeStringChars(0)
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, shapesExtraTreeTables(0)
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, shapesExtraDictTables(0)
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, shapesExtraTreeShapeKids(0)
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, shapesCompartmentTables(0)
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, scriptData(0)
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, jaegerData(0)
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, ionData(0)
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, compartmentObject(0)
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, crossCompartmentWrappersTable(0)
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, regexpCompartment(0)
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, debuggeesSet(0)
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{}
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CompartmentStats(const CompartmentStats &other)
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: extra1(other.extra1)
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, extra2(other.extra2)
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, gcHeapArenaAdmin(other.gcHeapArenaAdmin)
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, gcHeapUnusedGcThings(other.gcHeapUnusedGcThings)
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, gcHeapObjectsNonFunction(other.gcHeapObjectsNonFunction)
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, gcHeapObjectsFunction(other.gcHeapObjectsFunction)
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, gcHeapStrings(other.gcHeapStrings)
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, gcHeapShapesTree(other.gcHeapShapesTree)
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, gcHeapShapesDict(other.gcHeapShapesDict)
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, gcHeapShapesBase(other.gcHeapShapesBase)
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, gcHeapScripts(other.gcHeapScripts)
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, gcHeapTypeObjects(other.gcHeapTypeObjects)
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, gcHeapIonCodes(other.gcHeapIonCodes)
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#if JS_HAS_XML_SUPPORT
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, gcHeapXML(other.gcHeapXML)
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#endif
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, objectSlots(other.objectSlots)
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, objectElements(other.objectElements)
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, objectMisc(other.objectMisc)
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, objectPrivate(other.objectPrivate)
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, nonHugeStringChars(other.nonHugeStringChars)
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, shapesExtraTreeTables(other.shapesExtraTreeTables)
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, shapesExtraDictTables(other.shapesExtraDictTables)
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, shapesExtraTreeShapeKids(other.shapesExtraTreeShapeKids)
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, shapesCompartmentTables(other.shapesCompartmentTables)
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, scriptData(other.scriptData)
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, jaegerData(other.jaegerData)
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, ionData(other.ionData)
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, compartmentObject(other.compartmentObject)
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, crossCompartmentWrappersTable(other.crossCompartmentWrappersTable)
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, regexpCompartment(other.regexpCompartment)
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, debuggeesSet(other.debuggeesSet)
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, typeInferenceSizes(other.typeInferenceSizes)
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{
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hugeStrings.append(other.hugeStrings);
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}
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// These fields can be used by embedders.
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void *extra1;
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void *extra2;
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// If you add a new number, remember to update the constructors, add(), and
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// maybe gcHeapThingsSize()!
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size_t gcHeapArenaAdmin;
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size_t gcHeapUnusedGcThings;
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size_t gcHeapObjectsNonFunction;
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size_t gcHeapObjectsFunction;
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size_t gcHeapStrings;
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size_t gcHeapShapesTree;
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size_t gcHeapShapesDict;
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size_t gcHeapShapesBase;
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size_t gcHeapScripts;
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size_t gcHeapTypeObjects;
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size_t gcHeapIonCodes;
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#if JS_HAS_XML_SUPPORT
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size_t gcHeapXML;
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#endif
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size_t objectSlots;
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size_t objectElements;
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size_t objectMisc;
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size_t objectPrivate;
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size_t nonHugeStringChars;
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size_t shapesExtraTreeTables;
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size_t shapesExtraDictTables;
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size_t shapesExtraTreeShapeKids;
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size_t shapesCompartmentTables;
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size_t scriptData;
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size_t jaegerData;
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size_t ionData;
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size_t compartmentObject;
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size_t crossCompartmentWrappersTable;
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size_t regexpCompartment;
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size_t debuggeesSet;
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TypeInferenceSizes typeInferenceSizes;
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js::Vector<HugeStringInfo, 0, js::SystemAllocPolicy> hugeStrings;
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// Add cStats's numbers to this object's numbers.
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void add(CompartmentStats &cStats)
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{
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#define ADD(x) this->x += cStats.x
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ADD(gcHeapArenaAdmin);
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ADD(gcHeapUnusedGcThings);
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ADD(gcHeapObjectsNonFunction);
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ADD(gcHeapObjectsFunction);
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ADD(gcHeapStrings);
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ADD(gcHeapShapesTree);
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ADD(gcHeapShapesDict);
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ADD(gcHeapShapesBase);
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ADD(gcHeapScripts);
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ADD(gcHeapTypeObjects);
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ADD(gcHeapIonCodes);
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#if JS_HAS_XML_SUPPORT
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ADD(gcHeapXML);
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#endif
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ADD(objectSlots);
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ADD(objectElements);
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ADD(objectMisc);
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ADD(objectPrivate);
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ADD(nonHugeStringChars);
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ADD(shapesExtraTreeTables);
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ADD(shapesExtraDictTables);
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ADD(shapesExtraTreeShapeKids);
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ADD(shapesCompartmentTables);
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ADD(scriptData);
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ADD(jaegerData);
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ADD(ionData);
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ADD(compartmentObject);
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ADD(crossCompartmentWrappersTable);
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ADD(regexpCompartment);
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ADD(debuggeesSet);
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#undef ADD
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typeInferenceSizes.add(cStats.typeInferenceSizes);
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hugeStrings.append(cStats.hugeStrings);
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}
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// The size of all the live things in the GC heap.
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size_t gcHeapThingsSize();
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};
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struct RuntimeStats
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{
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RuntimeStats(JSMallocSizeOfFun mallocSizeOf)
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: runtime()
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, gcHeapChunkTotal(0)
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, gcHeapDecommittedArenas(0)
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, gcHeapUnusedChunks(0)
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, gcHeapUnusedArenas(0)
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, gcHeapUnusedGcThings(0)
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, gcHeapChunkAdmin(0)
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, gcHeapGcThings(0)
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, totals()
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, compartmentStatsVector()
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, currCompartmentStats(NULL)
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, mallocSizeOf(mallocSizeOf)
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{}
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RuntimeSizes runtime;
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// If you add a new number, remember to update the constructor!
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// Here's a useful breakdown of the GC heap.
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//
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// - rtStats.gcHeapChunkTotal
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// - decommitted bytes
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// - rtStats.gcHeapDecommittedArenas (decommitted arenas in non-empty chunks)
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// - unused bytes
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// - rtStats.gcHeapUnusedChunks (empty chunks)
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// - rtStats.gcHeapUnusedArenas (empty arenas within non-empty chunks)
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// - rtStats.total.gcHeapUnusedGcThings (empty GC thing slots within non-empty arenas)
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// - used bytes
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// - rtStats.gcHeapChunkAdmin
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// - rtStats.total.gcHeapArenaAdmin
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// - rtStats.gcHeapGcThings (in-use GC things)
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//
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// It's possible that some arenas in empty chunks may be decommitted, but
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// we don't count those under rtStats.gcHeapDecommittedArenas because (a)
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// it's rare, and (b) this means that rtStats.gcHeapUnusedChunks is a
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// multiple of the chunk size, which is good.
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size_t gcHeapChunkTotal;
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size_t gcHeapDecommittedArenas;
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size_t gcHeapUnusedChunks;
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size_t gcHeapUnusedArenas;
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size_t gcHeapUnusedGcThings;
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size_t gcHeapChunkAdmin;
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size_t gcHeapGcThings;
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// The sum of all compartment's measurements.
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CompartmentStats totals;
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js::Vector<CompartmentStats, 0, js::SystemAllocPolicy> compartmentStatsVector;
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CompartmentStats *currCompartmentStats;
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JSMallocSizeOfFun mallocSizeOf;
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virtual void initExtraCompartmentStats(JSCompartment *c, CompartmentStats *cstats) = 0;
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};
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#ifdef JS_THREADSAFE
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class ObjectPrivateVisitor
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{
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public:
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// Within CollectRuntimeStats, this method is called for each JS object
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// that has a private slot containing an nsISupports pointer.
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virtual size_t sizeOfIncludingThis(void *aSupports) = 0;
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};
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extern JS_PUBLIC_API(bool)
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CollectRuntimeStats(JSRuntime *rt, RuntimeStats *rtStats, ObjectPrivateVisitor *opv);
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extern JS_PUBLIC_API(int64_t)
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GetExplicitNonHeapForRuntime(JSRuntime *rt, JSMallocSizeOfFun mallocSizeOf);
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#endif // JS_THREADSAFE
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extern JS_PUBLIC_API(size_t)
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SystemCompartmentCount(const JSRuntime *rt);
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extern JS_PUBLIC_API(size_t)
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UserCompartmentCount(const JSRuntime *rt);
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} // namespace JS
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#endif // js_MemoryMetrics_h
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