/usr/include/js-17.0/js/MemoryMetrics.h is in libmozjs-17.0-dev 17.0.0-1ubuntu1.
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* vim: set ts=8 sw=4 et tw=99 ft=cpp:
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef js_MemoryMetrics_h
#define js_MemoryMetrics_h
/*
* These declarations are not within jsapi.h because they are highly likely
* to change in the future. Depend on them at your own risk.
*/
#include <string.h>
#include "jsalloc.h"
#include "jspubtd.h"
#include "js/Utility.h"
#include "js/Vector.h"
namespace JS {
/* Data for tracking analysis/inference memory usage. */
struct TypeInferenceSizes
{
size_t scripts;
size_t objects;
size_t tables;
size_t temporary;
void add(TypeInferenceSizes &sizes) {
this->scripts += sizes.scripts;
this->objects += sizes.objects;
this->tables += sizes.tables;
this->temporary += sizes.temporary;
}
};
// These measurements relate directly to the JSRuntime, and not to
// compartments within it.
struct RuntimeSizes
{
RuntimeSizes()
: object(0)
, atomsTable(0)
, contexts(0)
, dtoa(0)
, temporary(0)
, mjitCode(0)
, regexpCode(0)
, unusedCodeMemory(0)
, stackCommitted(0)
, gcMarker(0)
, mathCache(0)
, scriptFilenames(0)
, scriptSources(0)
, compartmentObjects(0)
{}
size_t object;
size_t atomsTable;
size_t contexts;
size_t dtoa;
size_t temporary;
size_t mjitCode;
size_t regexpCode;
size_t unusedCodeMemory;
size_t stackCommitted;
size_t gcMarker;
size_t mathCache;
size_t scriptFilenames;
size_t scriptSources;
// This is the exception to the "RuntimeSizes doesn't measure things within
// compartments" rule. We combine the sizes of all the JSCompartment
// objects into a single measurement because each one is fairly small, and
// they're all the same size.
size_t compartmentObjects;
};
struct CompartmentStats
{
CompartmentStats() {
memset(this, 0, sizeof(*this));
}
// These fields can be used by embedders.
void *extra1;
void *extra2;
// If you add a new number, remember to update add() and maybe
// gcHeapThingsSize()!
size_t gcHeapArenaAdmin;
size_t gcHeapUnusedGcThings;
size_t gcHeapObjectsNonFunction;
size_t gcHeapObjectsFunction;
size_t gcHeapStrings;
size_t gcHeapShapesTree;
size_t gcHeapShapesDict;
size_t gcHeapShapesBase;
size_t gcHeapScripts;
size_t gcHeapTypeObjects;
#if JS_HAS_XML_SUPPORT
size_t gcHeapXML;
#endif
size_t objectSlots;
size_t objectElements;
size_t objectMisc;
size_t objectPrivate;
size_t stringChars;
size_t shapesExtraTreeTables;
size_t shapesExtraDictTables;
size_t shapesExtraTreeShapeKids;
size_t shapesCompartmentTables;
size_t scriptData;
size_t mjitData;
size_t crossCompartmentWrappers;
TypeInferenceSizes typeInferenceSizes;
// Add cStats's numbers to this object's numbers.
void add(CompartmentStats &cStats) {
#define ADD(x) this->x += cStats.x
ADD(gcHeapArenaAdmin);
ADD(gcHeapUnusedGcThings);
ADD(gcHeapObjectsNonFunction);
ADD(gcHeapObjectsFunction);
ADD(gcHeapStrings);
ADD(gcHeapShapesTree);
ADD(gcHeapShapesDict);
ADD(gcHeapShapesBase);
ADD(gcHeapScripts);
ADD(gcHeapTypeObjects);
#if JS_HAS_XML_SUPPORT
ADD(gcHeapXML);
#endif
ADD(objectSlots);
ADD(objectElements);
ADD(objectMisc);
ADD(objectPrivate);
ADD(stringChars);
ADD(shapesExtraTreeTables);
ADD(shapesExtraDictTables);
ADD(shapesExtraTreeShapeKids);
ADD(shapesCompartmentTables);
ADD(scriptData);
ADD(mjitData);
ADD(crossCompartmentWrappers);
#undef ADD
typeInferenceSizes.add(cStats.typeInferenceSizes);
}
// The size of all the live things in the GC heap.
size_t gcHeapThingsSize();
};
struct RuntimeStats
{
RuntimeStats(JSMallocSizeOfFun mallocSizeOf)
: runtime()
, gcHeapChunkTotal(0)
, gcHeapDecommittedArenas(0)
, gcHeapUnusedChunks(0)
, gcHeapUnusedArenas(0)
, gcHeapUnusedGcThings(0)
, gcHeapChunkAdmin(0)
, gcHeapGcThings(0)
, totals()
, compartmentStatsVector()
, currCompartmentStats(NULL)
, mallocSizeOf(mallocSizeOf)
{}
RuntimeSizes runtime;
// If you add a new number, remember to update the constructor!
// Here's a useful breakdown of the GC heap.
//
// - rtStats.gcHeapChunkTotal
// - decommitted bytes
// - rtStats.gcHeapDecommittedArenas (decommitted arenas in non-empty chunks)
// - unused bytes
// - rtStats.gcHeapUnusedChunks (empty chunks)
// - rtStats.gcHeapUnusedArenas (empty arenas within non-empty chunks)
// - rtStats.total.gcHeapUnusedGcThings (empty GC thing slots within non-empty arenas)
// - used bytes
// - rtStats.gcHeapChunkAdmin
// - rtStats.total.gcHeapArenaAdmin
// - rtStats.gcHeapGcThings (in-use GC things)
//
// It's possible that some arenas in empty chunks may be decommitted, but
// we don't count those under rtStats.gcHeapDecommittedArenas because (a)
// it's rare, and (b) this means that rtStats.gcHeapUnusedChunks is a
// multiple of the chunk size, which is good.
size_t gcHeapChunkTotal;
size_t gcHeapDecommittedArenas;
size_t gcHeapUnusedChunks;
size_t gcHeapUnusedArenas;
size_t gcHeapUnusedGcThings;
size_t gcHeapChunkAdmin;
size_t gcHeapGcThings;
// The sum of all compartment's measurements.
CompartmentStats totals;
js::Vector<CompartmentStats, 0, js::SystemAllocPolicy> compartmentStatsVector;
CompartmentStats *currCompartmentStats;
JSMallocSizeOfFun mallocSizeOf;
virtual void initExtraCompartmentStats(JSCompartment *c, CompartmentStats *cstats) = 0;
};
#ifdef JS_THREADSAFE
class ObjectPrivateVisitor
{
public:
// Within CollectRuntimeStats, this method is called for each JS object
// that has a private slot containing an nsISupports pointer.
virtual size_t sizeOfIncludingThis(void *aSupports) = 0;
};
extern JS_PUBLIC_API(bool)
CollectRuntimeStats(JSRuntime *rt, RuntimeStats *rtStats, ObjectPrivateVisitor *opv);
extern JS_PUBLIC_API(int64_t)
GetExplicitNonHeapForRuntime(JSRuntime *rt, JSMallocSizeOfFun mallocSizeOf);
#endif /* JS_THREADSAFE */
extern JS_PUBLIC_API(size_t)
SystemCompartmentCount(const JSRuntime *rt);
extern JS_PUBLIC_API(size_t)
UserCompartmentCount(const JSRuntime *rt);
} // namespace JS
#endif // js_MemoryMetrics_h
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