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0ee4d7ca06
This will allow us to reuse the scanning protocol with an arbitrary area scanning function (replacing traceFormatScan) in order to implement formatted object walking without an extra segment method. Don't insist on scanning only grey segments: we want to be able to reuse the scan protocol for walking, when the segments are black.
860 lines
34 KiB
C
860 lines
34 KiB
C
/* mpmst.h: MEMORY POOL MANAGER DATA STRUCTURES
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*
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* $Id$
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* Copyright (c) 2001-2020 Ravenbrook Limited. See end of file for license.
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* Portions copyright (C) 2001 Global Graphics Software.
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*
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* .design: This header file crosses module boundaries. The relevant
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* design a module's structures should be found in that module's design
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* document.
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*
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* .structure: Most structures have already been declared as incomplete
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* types in <code/mpmtypes.h>. Most of the structures are the underlying
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* aggregate types for an abstract data type.
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*
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* .rationale.sig: Object signatures (PoolSig, etc.) are defined here,
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* along with the structures, so that any code which can see a structure
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* can also check its signature before using any of its fields. See
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* <design/sig#.test.uniq> to check that signatures are unique. */
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#ifndef mpmst_h
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#define mpmst_h
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#include "config.h"
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#include "mpmtypes.h"
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#include "protocol.h"
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#include "ring.h"
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#include "locus.h"
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#include "splay.h"
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#include "meter.h"
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/* PoolClassStruct -- pool class structure
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*
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* <design/pool>.
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*
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* .class: The pool class structure is defined by each pool class
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* implementation in order to provide an interface between the MPM and
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* the class <design/pool> via generic functions <code/pool.c>. Pool
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* classes use the class protocol <design/protocol> and so
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* CLASS(ABCPool) returns a PoolClass pointing to a PoolClassStruct of
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* methods which implement the memory management policy for pool class
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* ABC.
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*
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* .class.end-sig: The class structure has a signature at the end. This
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* causes the compiler to complain if the class structure is extended
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* without modifying static initializers. */
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#define PoolClassSig ((Sig)0x519C7A55) /* SIGnature pool CLASS */
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typedef struct mps_pool_class_s {
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InstClassStruct instClassStruct;
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size_t size; /* size of outer structure */
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Attr attr; /* attributes */
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PoolVarargsMethod varargs; /* convert deprecated varargs into keywords */
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PoolInitMethod init; /* initialize the pool descriptor */
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PoolAllocMethod alloc; /* allocate memory from pool */
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PoolFreeMethod free; /* free memory to pool */
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PoolSegPoolGenMethod segPoolGen; /* get pool generation of segment */
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PoolBufferFillMethod bufferFill; /* out-of-line reserve */
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PoolBufferEmptyMethod bufferEmpty; /* out-of-line commit */
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PoolRampBeginMethod rampBegin;/* begin a ramp pattern */
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PoolRampEndMethod rampEnd; /* end a ramp pattern */
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PoolFramePushMethod framePush; /* push an allocation frame */
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PoolFramePopMethod framePop; /* pop an allocation frame */
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PoolFreeWalkMethod freewalk; /* walk over free blocks */
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PoolBufferClassMethod bufferClass; /* default BufferClass of pool */
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PoolDebugMixinMethod debugMixin; /* find the debug mixin, if any */
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PoolSizeMethod totalSize; /* total memory allocated from arena */
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PoolSizeMethod freeSize; /* free memory (unused by client program) */
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Sig sig; /* .class.end-sig */
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} PoolClassStruct;
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/* PoolStruct -- generic structure
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*
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* .pool: A generic structure is created when a pool is created and
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* holds the generic part of the pool's state. Each pool class defines
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* a "subclass" of the pool structure (the "outer structure") which
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* contains PoolStruct as a field. The outer structure holds the
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* class-specific part of the pool's state. See <code/pool.c>,
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* <design/pool>.
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*/
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#define PoolSig ((Sig)0x519B0019) /* SIGnature POOL */
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typedef struct mps_pool_s { /* generic structure */
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InstStruct instStruct;
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Sig sig; /* <design/sig> */
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Serial serial; /* from arena->poolSerial */
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Arena arena; /* owning arena */
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RingStruct arenaRing; /* link in list of pools in arena */
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RingStruct bufferRing; /* allocation buffers are attached to pool */
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Serial bufferSerial; /* serial of next buffer */
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RingStruct segRing; /* segs are attached to pool */
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Align alignment; /* alignment for grains */
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Shift alignShift; /* log2(alignment) */
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Format format; /* format or NULL */
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} PoolStruct;
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/* MFSStruct -- MFS (Manual Fixed Small) pool outer structure
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*
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* .mfs: See <code/poolmfs.c>, <design/poolmfs>.
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*
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* The MFS outer structure is declared here because it is inlined
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* in the control pool structure which is inlined in the arena. Normally,
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* pool outer structures are declared with the pools.
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*
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* The signature is placed at the end, see
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* <design/pool#.outer-structure.sig>. */
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#define MFSSig ((Sig)0x5193F599) /* SIGnature MFS */
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typedef struct MFSStruct { /* MFS outer structure */
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PoolStruct poolStruct; /* generic structure */
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Size unroundedUnitSize; /* the unit size requested */
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Size extendBy; /* arena alloc size rounded using unitSize */
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Bool extendSelf; /* whether to allocate tracts */
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Size unitSize; /* rounded for management purposes */
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struct MFSHeaderStruct *freeList; /* head of the free list */
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Size total; /* total size allocated from arena */
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Size free; /* free space in pool */
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RingStruct extentRing; /* ring of extents in pool */
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Sig sig; /* <design/sig> */
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} MFSStruct;
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/* MessageClassStruct -- Message Class structure
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*
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* <design/message#.class.struct>, <design/message#.message>,
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* and <design/message#.class>.
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*/
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#define MessageClassSig ((Sig)0x519359c1) /* SIGnature MeSsaGe CLass */
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typedef struct MessageClassStruct {
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Sig sig; /* <design/sig> */
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const char *name; /* Human readable Class name */
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MessageType type; /* Message Type */
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/* generic methods */
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MessageDeleteMethod delete; /* terminates a message */
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/* methods specific to MessageTypeFINALIZATION */
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MessageFinalizationRefMethod finalizationRef;
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/* methods specific to MessageTypeGC */
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MessageGCLiveSizeMethod gcLiveSize;
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MessageGCCondemnedSizeMethod gcCondemnedSize;
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MessageGCNotCondemnedSizeMethod gcNotCondemnedSize;
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/* methods specific to MessageTypeGCSTART */
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MessageGCStartWhyMethod gcStartWhy;
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Sig endSig; /* <design/message#.class.sig.double> */
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} MessageClassStruct;
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#define MessageSig ((Sig)0x5193e559) /* SIG MESSaGe */
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/* MessageStruct -- Message structure
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*
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* <design/message#.message.struct>. */
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typedef struct mps_message_s {
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Sig sig; /* <design/sig> */
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Arena arena; /* owning arena */
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MessageClass klass; /* Message Class Structure */
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Clock postedClock; /* mps_clock() at post time, or 0 */
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RingStruct queueRing; /* Message queue ring */
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} MessageStruct;
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/* SegClassStruct -- segment class structure
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*
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* <design/seg> & <design/protocol>.
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*
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* .seg.class: The segment class structure is defined by each segment
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* class implementation in order to provide a generic interface to
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* segments. */
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#define SegClassSig ((Sig)0x5195E9C7) /* SIGnature SEG CLass */
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typedef struct SegClassStruct {
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InstClassStruct instClassStruct;
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size_t size; /* size of outer structure */
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SegInitMethod init; /* initialize the segment */
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SegSetSummaryMethod setSummary; /* set the segment summary */
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SegBufferMethod buffer; /* get the segment buffer */
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SegSetBufferMethod setBuffer; /* set the segment buffer */
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SegUnsetBufferMethod unsetBuffer; /* unset the segment buffer */
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SegBufferFillMethod bufferFill; /* try filling buffer from segment */
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SegBufferEmptyMethod bufferEmpty; /* empty buffer to segment */
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SegSetGreyMethod setGrey; /* change greyness of segment */
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SegFlipMethod flip; /* raise barrier for a flipped trace */
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SegSetWhiteMethod setWhite; /* change whiteness of segment */
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SegSetRankSetMethod setRankSet; /* change rank set of segment */
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SegSetRankSummaryMethod setRankSummary; /* change rank set & summary */
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SegMergeMethod merge; /* merge two adjacent segments */
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SegSplitMethod split; /* split a segment into two */
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SegAccessMethod access; /* handles read/write accesses */
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SegWhitenMethod whiten; /* whiten objects */
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SegGreyenMethod greyen; /* greyen non-white objects */
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SegBlackenMethod blacken; /* blacken grey objects without scanning */
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SegScanMethod scan; /* find references during tracing */
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SegFixMethod fix; /* referent reachable during tracing */
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SegFixMethod fixEmergency; /* as fix, no failure allowed */
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SegReclaimMethod reclaim; /* reclaim dead objects after tracing */
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SegWalkMethod walk; /* walk over a segment */
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Sig sig; /* .class.end-sig */
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} SegClassStruct;
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/* SegStruct -- segment structure
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*
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* .seg: Segments are the basic units of protection and tracer activity
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* for allocated memory. <design/seg>. */
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#define SegSig ((Sig)0x5195E999) /* SIGnature SEG */
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typedef struct SegStruct { /* segment structure */
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InstStruct instStruct;
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Sig sig; /* <code/misc.h#sig> */
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Tract firstTract; /* first tract of segment */
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RingStruct poolRing; /* link in list of segs in pool */
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Addr limit; /* limit of segment */
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unsigned depth : ShieldDepthWIDTH; /* see <design/shield#.def.depth> */
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BOOLFIELD(queued); /* in shield queue? */
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AccessSet pm : AccessLIMIT; /* protection mode, <code/shield.c> */
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AccessSet sm : AccessLIMIT; /* shield mode, <code/shield.c> */
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TraceSet grey : TraceLIMIT; /* traces for which seg is grey */
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TraceSet white : TraceLIMIT; /* traces for which seg is white */
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TraceSet nailed : TraceLIMIT; /* traces for which seg has nailed objects */
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RankSet rankSet : RankLIMIT; /* ranks of references in this seg */
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unsigned defer : WB_DEFER_BITS; /* defer write barrier for this many scans */
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} SegStruct;
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/* GCSegStruct -- GCable segment structure
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*
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* .seggc: GCSeg is a subclass of Seg with support for buffered
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* allocation and GC. <design/seg>. */
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#define GCSegSig ((Sig)0x5199C5E9) /* SIGnature GC SEG */
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typedef struct GCSegStruct { /* GC segment structure */
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SegStruct segStruct; /* superclass fields must come first */
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RingStruct greyRing; /* link in list of grey segs */
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RefSet summary; /* summary of references out of seg */
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Buffer buffer; /* non-NULL if seg is buffered */
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RingStruct genRing; /* link in list of segs in gen */
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Sig sig; /* <design/sig> */
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} GCSegStruct;
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/* LocusPrefStruct -- locus preference structure
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*
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* .locus-pref: arena memory users (pool class code) need a way of
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* expressing preferences about the locus of the segments they
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* allocate. <design/locus>.
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*/
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#define LocusPrefSig ((Sig)0x51970CB6) /* SIGnature LOCus PRef */
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typedef struct LocusPrefStruct { /* locus placement preferences */
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Sig sig; /* <code/misc.h#sig> */
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Bool high; /* high or low */
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ZoneSet zones; /* preferred zones */
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ZoneSet avoid; /* zones to avoid */
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} LocusPrefStruct;
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/* BufferClassStruct -- buffer class structure
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*
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* <design/buffer> & <design/protocol>.
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*
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* .buffer.class: The buffer class structure is defined by each buffer
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* class implementation in order to provide a generic interface to
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* buffers. */
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#define BufferClassSig ((Sig)0x519B0FC7) /* SIGnature BUFfer CLass */
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typedef struct BufferClassStruct {
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InstClassStruct instClassStruct;
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size_t size; /* size of outer structure */
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BufferVarargsMethod varargs; /* parse obsolete varargs */
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BufferInitMethod init; /* initialize the buffer */
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BufferAttachMethod attach; /* attach the buffer */
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BufferDetachMethod detach; /* detach the buffer */
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BufferSegMethod seg; /* seg of buffer */
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BufferRankSetMethod rankSet; /* rank set of buffer */
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BufferSetRankSetMethod setRankSet; /* change rank set of buffer */
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BufferReassignSegMethod reassignSeg; /* change seg of attached buffer */
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Sig sig; /* .class.end-sig */
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} BufferClassStruct;
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/* BufferStruct -- allocation buffer structure
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*
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* See <code/buffer.c>, <design/buffer>.
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*
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* The buffer contains an AP which may be exported to the client.
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* AP are part of the design of buffers see <design/buffer>.
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* The allocation point is exported to the client code so that it can
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* do in-line buffered allocation.
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*/
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#define BufferSig ((Sig)0x519B0FFE) /* SIGnature BUFFEr */
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typedef struct BufferStruct {
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InstStruct instStruct;
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Sig sig; /* <design/sig> */
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Serial serial; /* from pool->bufferSerial */
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Arena arena; /* owning arena */
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Pool pool; /* owning pool */
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RingStruct poolRing; /* buffers are attached to pools */
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Bool isMutator; /* TRUE iff buffer used by mutator */
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BufferMode mode; /* Attached/Logged/Flipped/etc */
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double fillSize; /* bytes filled in this buffer */
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double emptySize; /* bytes emptied from this buffer */
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Addr base; /* base address of allocation buffer */
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Addr initAtFlip; /* limit of initialized data at flip */
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mps_ap_s ap_s; /* the allocation point */
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Addr poolLimit; /* the pool's idea of the limit */
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Align alignment; /* allocation alignment */
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unsigned rampCount; /* see <code/buffer.c#ramp.hack> */
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} BufferStruct;
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/* SegBufStruct -- Buffer structure associated with segments
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*
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* .segbuf: SegBuf is a subclass of Buffer with support for attachment
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* to segments. */
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#define SegBufSig ((Sig)0x51959B0F) /* SIGnature SeG BUFfer */
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typedef struct SegBufStruct {
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BufferStruct bufferStruct; /* superclass fields must come first */
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RankSet rankSet; /* ranks of references being created */
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Seg seg; /* segment being buffered */
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Sig sig; /* <design/sig> */
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} SegBufStruct;
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/* FormatStruct -- object format structure
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*
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* <design/format-interface>, <code/format.c>.
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*
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* .single: In future, when more variants are added, FormatStruct should
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* really be replaced by a collection of format classes. */
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#define FormatSig ((Sig)0x519F63A2) /* Signature FoRMAT */
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typedef struct mps_fmt_s {
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Sig sig;
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Serial serial; /* from arena->formatSerial */
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Arena arena; /* owning arena */
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RingStruct arenaRing; /* formats are attached to the arena */
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Count poolCount; /* number of pools using the format */
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Align alignment; /* alignment of formatted objects */
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mps_fmt_scan_t scan;
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mps_fmt_skip_t skip;
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mps_fmt_fwd_t move;
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mps_fmt_isfwd_t isMoved;
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mps_fmt_pad_t pad;
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mps_fmt_class_t klass; /* pointer indicating class */
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Size headerSize; /* size of header */
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} FormatStruct;
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/* ScanState
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*
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* .ss: See <code/trace.c>.
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*
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* .ss: The mps_ss field of the scan state structure is exported
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* through the MPS interface to optimise the critical path scan loop.
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* See ["The critical path through the MPS"](../design/critical-path.txt).
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*
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* .ss.fix-closure: The fixClosure member allows the caller of the
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* scanning protocol to pass data through to this fix function. This
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* is not used in the public MPS, but is needed by the transforms
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* extension.
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*
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* .ss.zone: For binary compatibility, the zone shift is exported as
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* a word rather than a shift, so that the external mps_ss_s is a uniform
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* three-word structure. See <code/mps.h#ss> and <design/interface-c>.
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*
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* zs Shift zoneShift copy of arena->zoneShift. See .ss.zone
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* w ZoneSet white white set, for inline fix test
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* ufs RefSet unfixedSummary accumulated summary of scanned references
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*
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* NOTE: The mps_ss structure used to be obfuscated to preserve Harlequin's
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* trade secrets in the MPS technology. These days they just seek to
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* emphasize the abstraction, and could maybe be given better names and
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* types. RB 2012-09-07
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*/
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#define ScanStateSig ((Sig)0x5195CA45) /* SIGnature SCAN State */
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typedef struct ScanStateStruct {
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Sig sig; /* <design/sig> */
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struct mps_ss_s ss_s; /* .ss <http://bash.org/?400459> */
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Arena arena; /* owning arena */
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mps_area_scan_t formatScan; /* formatted area scanning function */
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void *formatScanClosure; /* closure argument for .formatScan */
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SegFixMethod fix; /* third stage fix function */
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void *fixClosure; /* see .ss.fix-closure */
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TraceSet traces; /* traces to scan for */
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Rank rank; /* reference rank of scanning */
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Bool wasMarked; /* <design/fix#.protocol.was-ready> */
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RefSet fixedSummary; /* accumulated summary of fixed references */
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STATISTIC_DECL(Count fixRefCount) /* refs which pass zone check */
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STATISTIC_DECL(Count segRefCount) /* refs which refer to segs */
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STATISTIC_DECL(Count whiteSegRefCount) /* refs which refer to white segs */
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STATISTIC_DECL(Count nailCount) /* segments nailed by ambig refs */
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STATISTIC_DECL(Count snapCount) /* refs snapped to forwarded objs */
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STATISTIC_DECL(Count forwardedCount) /* objects preserved by moving */
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STATISTIC_DECL(Count preservedInPlaceCount) /* objects preserved in place */
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STATISTIC_DECL(Size copiedSize) /* bytes copied */
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Size scannedSize; /* bytes scanned */
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} ScanStateStruct;
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/* TraceStruct -- tracer state structure */
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#define TraceSig ((Sig)0x51924ACE) /* SIGnature TRACE */
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typedef struct TraceStruct {
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Sig sig; /* <design/sig> */
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TraceId ti; /* index into TraceSets */
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Arena arena; /* owning arena */
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TraceStartWhy why; /* why the trace began */
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ZoneSet white; /* zones in the white set */
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ZoneSet mayMove; /* zones containing possibly moving objs */
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TraceState state; /* current state of trace */
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Rank band; /* current band */
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Bool firstStretch; /* in first stretch of band (see accessor) */
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SegFixMethod fix; /* fix method to apply to references */
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void *fixClosure; /* see .ss.fix-closure */
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RingStruct genRing; /* ring of generations condemned for trace */
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STATISTIC_DECL(Size preTraceArenaReserved) /* ArenaReserved before this trace */
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Size condemned; /* condemned bytes */
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Size notCondemned; /* collectable but not condemned */
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Size foundation; /* initial grey set size */
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Work quantumWork; /* tracing work to be done in each poll */
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STATISTIC_DECL(Count greySegCount) /* number of grey segments */
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STATISTIC_DECL(Count greySegMax) /* maximum number of grey segments */
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STATISTIC_DECL(Count rootScanCount) /* number of roots scanned */
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Count rootScanSize; /* total size of scanned roots */
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STATISTIC_DECL(Size rootCopiedSize) /* bytes copied by scanning roots */
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STATISTIC_DECL(Count segScanCount) /* number of segments scanned */
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Count segScanSize; /* total size of scanned segments */
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STATISTIC_DECL(Size segCopiedSize) /* bytes copied by scanning segments */
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STATISTIC_DECL(Count singleScanCount) /* number of single refs scanned */
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STATISTIC_DECL(Count singleScanSize) /* total size of single refs scanned */
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STATISTIC_DECL(Size singleCopiedSize) /* bytes copied by scanning single refs */
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STATISTIC_DECL(Count fixRefCount) /* refs which pass zone check */
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STATISTIC_DECL(Count segRefCount) /* refs which refer to segments */
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STATISTIC_DECL(Count whiteSegRefCount) /* refs which refer to white segs */
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STATISTIC_DECL(Count nailCount) /* segments nailed by ambiguous refs */
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STATISTIC_DECL(Count snapCount) /* refs snapped to forwarded objects */
|
|
STATISTIC_DECL(Count readBarrierHitCount) /* read barrier faults */
|
|
STATISTIC_DECL(Count pointlessScanCount) /* pointless segment scans */
|
|
STATISTIC_DECL(Count forwardedCount) /* objects preserved by moving */
|
|
Size forwardedSize; /* bytes preserved by moving */
|
|
STATISTIC_DECL(Count preservedInPlaceCount) /* objects preserved in place */
|
|
Size preservedInPlaceSize; /* bytes preserved in place */
|
|
STATISTIC_DECL(Count reclaimCount) /* segments reclaimed */
|
|
STATISTIC_DECL(Count reclaimSize) /* bytes reclaimed */
|
|
} TraceStruct;
|
|
|
|
|
|
/* ArenaClassStruct -- generic arena class interface */
|
|
|
|
#define ArenaClassSig ((Sig)0x519A6C1A) /* SIGnature ARena CLAss */
|
|
|
|
typedef struct mps_arena_class_s {
|
|
InstClassStruct instClassStruct;
|
|
size_t size; /* size of outer structure */
|
|
ArenaVarargsMethod varargs;
|
|
ArenaInitMethod init;
|
|
ArenaCreateMethod create;
|
|
ArenaDestroyMethod destroy;
|
|
ArenaPurgeSpareMethod purgeSpare;
|
|
ArenaExtendMethod extend;
|
|
ArenaGrowMethod grow;
|
|
ArenaFreeMethod free;
|
|
ArenaChunkInitMethod chunkInit;
|
|
ArenaChunkFinishMethod chunkFinish;
|
|
ArenaCompactMethod compact;
|
|
ArenaPagesMarkAllocatedMethod pagesMarkAllocated;
|
|
ArenaChunkPageMappedMethod chunkPageMapped;
|
|
Sig sig;
|
|
} ArenaClassStruct;
|
|
|
|
|
|
/* GlobalsStruct -- the global state associated with an arena
|
|
*
|
|
* .space: The arena structure holds the entire state of the MPS, and as
|
|
* such contains a lot of fields which are considered "global". These
|
|
* fields belong to different modules. The module which owns each group
|
|
* of fields is commented. */
|
|
|
|
#define GlobalsSig ((Sig)0x519970BA) /* SIGnature GLOBAls */
|
|
|
|
typedef struct GlobalsStruct {
|
|
Sig sig;
|
|
|
|
/* general fields <code/global.c> */
|
|
RingStruct globalRing; /* node in global ring of arenas */
|
|
Lock lock; /* arena's lock */
|
|
|
|
/* polling fields <code/global.c> */
|
|
double pollThreshold; /* <design/arena#.poll> */
|
|
Bool insidePoll;
|
|
Bool clamped; /* prevent background activity */
|
|
double fillMutatorSize; /* total bytes filled, mutator buffers */
|
|
double emptyMutatorSize; /* total bytes emptied, mutator buffers */
|
|
double allocMutatorSize; /* fill-empty, only asymptotically accurate */
|
|
double fillInternalSize; /* total bytes filled, internal buffers */
|
|
double emptyInternalSize; /* total bytes emptied, internal buffers */
|
|
|
|
/* version field <code/version.c> */
|
|
const char *mpsVersionString; /* MPSVersion() */
|
|
|
|
/* buffer fields <code/buffer.c> */
|
|
Bool bufferLogging; /* <design/buffer#.logging.control> */
|
|
|
|
/* pool fields <code/pool.c> */
|
|
RingStruct poolRing; /* ring of pools in arena */
|
|
Serial poolSerial; /* serial of next created pool */
|
|
Count systemPools; /* count of pools remaining at ArenaDestroy */
|
|
|
|
/* root fields <code/root.c> */
|
|
RingStruct rootRing; /* ring of roots attached to arena */
|
|
Serial rootSerial; /* serial of next root */
|
|
|
|
/* locus <code/locus.c> */
|
|
Chain defaultChain; /* default chain for GC pool */
|
|
} GlobalsStruct;
|
|
|
|
|
|
/* LandClassStruct -- land class structure
|
|
*
|
|
* <design/land>.
|
|
*/
|
|
|
|
#define LandClassSig ((Sig)0x5197A4DC) /* SIGnature LAND Class */
|
|
|
|
typedef struct LandClassStruct {
|
|
InstClassStruct instClassStruct;
|
|
size_t size; /* size of outer structure */
|
|
LandSizeMethod sizeMethod; /* total size of ranges in land */
|
|
LandInitMethod init; /* initialize the land */
|
|
LandInsertMethod insert; /* insert a range into the land */
|
|
LandInsertMethod insertSteal; /* insert a range, possibly stealing memory */
|
|
LandDeleteMethod delete; /* delete a range from the land */
|
|
LandDeleteMethod deleteSteal; /* delete a range, possibly stealing memory */
|
|
LandIterateMethod iterate; /* iterate over ranges in the land */
|
|
LandIterateAndDeleteMethod iterateAndDelete; /* iterate and maybe delete */
|
|
LandFindMethod findFirst; /* find first range of given size */
|
|
LandFindMethod findLast; /* find last range of given size */
|
|
LandFindMethod findLargest; /* find largest range */
|
|
LandFindInZonesMethod findInZones; /* find first range of given size in zone set */
|
|
Sig sig; /* .class.end-sig */
|
|
} LandClassStruct;
|
|
|
|
|
|
/* LandStruct -- generic land structure
|
|
*
|
|
* <design/land>, <code/land.c>
|
|
*/
|
|
|
|
#define LandSig ((Sig)0x5197A4D9) /* SIGnature LAND */
|
|
|
|
typedef struct LandStruct {
|
|
InstStruct instStruct;
|
|
Sig sig; /* <design/sig> */
|
|
Arena arena; /* owning arena */
|
|
Align alignment; /* alignment of addresses */
|
|
Bool inLand; /* prevent reentrance */
|
|
} LandStruct;
|
|
|
|
|
|
/* CBSStruct -- coalescing block structure
|
|
*
|
|
* CBS is a Land implementation that maintains a collection of
|
|
* disjoint ranges in a splay tree.
|
|
*
|
|
* See <code/cbs.c>.
|
|
*/
|
|
|
|
#define CBSSig ((Sig)0x519CB599) /* SIGnature CBS */
|
|
|
|
typedef struct CBSStruct {
|
|
LandStruct landStruct; /* superclass fields come first */
|
|
SplayTreeStruct splayTreeStruct;
|
|
STATISTIC_DECL(Count treeSize)
|
|
Pool blockPool; /* pool that manages blocks */
|
|
Size blockStructSize; /* size of block structure */
|
|
Bool ownPool; /* did we create blockPool? */
|
|
Size size; /* total size of ranges in CBS */
|
|
/* meters for sizes of search structures at each op */
|
|
METER_DECL(treeSearch)
|
|
Sig sig; /* .class.end-sig */
|
|
} CBSStruct;
|
|
|
|
|
|
/* FailoverStruct -- fail over from one land to another
|
|
*
|
|
* Failover is a Land implementation that combines two other Lands,
|
|
* using primary until it fails, and then using secondary.
|
|
*
|
|
* See <code/failover.c>.
|
|
*/
|
|
|
|
#define FailoverSig ((Sig)0x519FA170) /* SIGnature FAILOver */
|
|
|
|
typedef struct FailoverStruct {
|
|
LandStruct landStruct; /* superclass fields come first */
|
|
Land primary; /* use this land normally */
|
|
Land secondary; /* but use this one if primary fails */
|
|
Sig sig; /* .class.end-sig */
|
|
} FailoverStruct;
|
|
|
|
|
|
/* FreelistStruct -- address-ordered freelist
|
|
*
|
|
* Freelist is a subclass of Land that maintains a collection of
|
|
* disjoint ranges in an address-ordered freelist.
|
|
*
|
|
* See <code/freelist.c>.
|
|
*/
|
|
|
|
#define FreelistSig ((Sig)0x519F6331) /* SIGnature FREEL */
|
|
|
|
typedef union FreelistBlockUnion *FreelistBlock;
|
|
|
|
typedef struct FreelistStruct {
|
|
LandStruct landStruct; /* superclass fields come first */
|
|
FreelistBlock list; /* first block in list or NULL if empty */
|
|
Count listSize; /* number of blocks in list */
|
|
Size size; /* total size of ranges in list */
|
|
Sig sig; /* .class.end-sig */
|
|
} FreelistStruct;
|
|
|
|
|
|
/* SortStruct -- extra memory required by sorting
|
|
*
|
|
* See QuickSort in mpm.c. This exists so that the caller can make
|
|
* the choice about where to allocate the memory, since the MPS has to
|
|
* operate in tight stack constraints -- see <design/sp>.
|
|
*/
|
|
|
|
typedef struct SortStruct {
|
|
struct {
|
|
Index left, right;
|
|
} stack[MPS_WORD_WIDTH];
|
|
} SortStruct;
|
|
|
|
|
|
/* ShieldStruct -- per-arena part of the shield
|
|
*
|
|
* <design/shield>, <code/shield.c>.
|
|
*/
|
|
|
|
#define ShieldSig ((Sig)0x519581E1) /* SIGnature SHEILd */
|
|
|
|
typedef struct ShieldStruct {
|
|
Sig sig; /* <design/sig> */
|
|
BOOLFIELD(inside); /* <design/shield#.def.inside> */
|
|
BOOLFIELD(suspended); /* mutator suspended? */
|
|
BOOLFIELD(queuePending); /* queue insertion pending? */
|
|
Seg *queue; /* queue of unsynced segs */
|
|
Count length; /* number of elements in shield queue */
|
|
Index next; /* next free element in shield queue */
|
|
Index limit; /* high water mark for cache usage */
|
|
Count depth; /* sum of depths of all segs */
|
|
Count unsynced; /* number of unsynced segments */
|
|
Count holds; /* number of holds */
|
|
SortStruct sortStruct; /* workspace for queue sort */
|
|
} ShieldStruct;
|
|
|
|
|
|
/* History -- location dependency history
|
|
*
|
|
* <design/arena#.ld>.
|
|
*/
|
|
|
|
#define HistorySig ((Sig)0x51981520) /* SIGnature HISTOry */
|
|
|
|
typedef struct HistoryStruct {
|
|
Sig sig; /* <design/sig> */
|
|
Epoch epoch; /* <design/arena#.ld.epoch> */
|
|
RefSet prehistory; /* <design/arena#.ld.prehistory> */
|
|
RefSet history[LDHistoryLENGTH]; /* <design/arena#.ld.history> */
|
|
} HistoryStruct;
|
|
|
|
|
|
/* MVFFStruct -- MVFF (Manual Variable First Fit) pool outer structure
|
|
*
|
|
* The signature is placed at the end, see
|
|
* <design/pool#.outer-structure.sig>
|
|
*
|
|
* The MVFF pool outer structure is declared here because it is the
|
|
* control pool structure which is inlined in the arena. Normally,
|
|
* pool outer structures are declared with the pools.
|
|
*/
|
|
|
|
#define MVFFSig ((Sig)0x5193FFF9) /* SIGnature MVFF */
|
|
|
|
typedef struct MVFFStruct { /* MVFF pool outer structure */
|
|
PoolStruct poolStruct; /* generic structure */
|
|
LocusPrefStruct locusPrefStruct; /* the preferences for allocation */
|
|
Size extendBy; /* size to extend pool by */
|
|
Size avgSize; /* client estimate of allocation size */
|
|
double spare; /* spare space fraction, see MVFFReduce */
|
|
MFSStruct cbsBlockPoolStruct; /* stores blocks for CBSs */
|
|
CBSStruct totalCBSStruct; /* all memory allocated from the arena */
|
|
CBSStruct freeCBSStruct; /* free memory (primary) */
|
|
FreelistStruct flStruct; /* free memory (secondary, for emergencies) */
|
|
FailoverStruct foStruct; /* free memory (fail-over mechanism) */
|
|
Bool firstFit; /* as opposed to last fit */
|
|
Bool slotHigh; /* prefers high part of large block */
|
|
Sig sig; /* <design/sig> */
|
|
} MVFFStruct;
|
|
|
|
|
|
/* ArenaStruct -- generic arena
|
|
*
|
|
* See <code/arena.c>.
|
|
*/
|
|
|
|
#define ArenaSig ((Sig)0x519A6E4A) /* SIGnature ARENA */
|
|
|
|
typedef struct mps_arena_s {
|
|
InstStruct instStruct;
|
|
|
|
GlobalsStruct globals; /* must be first, see <design/arena#.globals> */
|
|
Serial serial;
|
|
|
|
Bool poolReady; /* <design/arena#.pool.ready> */
|
|
MVFFStruct controlPoolStruct; /* <design/arena#.pool> */
|
|
|
|
Size reserved; /* total reserved address space */
|
|
Size committed; /* total committed memory */
|
|
Size commitLimit; /* client-configurable commit limit */
|
|
|
|
Size spareCommitted; /* amount of memory in hysteresis fund */
|
|
double spare; /* maximum spareCommitted/committed */
|
|
double pauseTime; /* maximum pause time, in seconds */
|
|
|
|
Shift zoneShift; /* see also <code/ref.c> */
|
|
Size grainSize; /* <design/arena#.grain> */
|
|
|
|
Tract lastTract; /* most recently allocated tract */
|
|
Addr lastTractBase; /* base address of lastTract */
|
|
|
|
Chunk primary; /* the primary chunk */
|
|
RingStruct chunkRing; /* all the chunks, in a ring for iteration */
|
|
Tree chunkTree; /* all the chunks, in a tree for fast lookup */
|
|
Serial chunkSerial; /* next chunk number */
|
|
|
|
Bool hasFreeLand; /* Is freeLand available? */
|
|
MFSStruct freeCBSBlockPoolStruct;
|
|
CBSStruct freeLandStruct;
|
|
ZoneSet freeZones; /* zones not yet allocated */
|
|
Bool zoned; /* use zoned allocation? */
|
|
|
|
/* locus fields <code/locus.c> */
|
|
GenDescStruct topGen; /* generation descriptor for dynamic gen */
|
|
Serial genSerial; /* serial of next generation */
|
|
|
|
/* format fields <code/format.c> */
|
|
RingStruct formatRing; /* ring of formats attached to arena */
|
|
Serial formatSerial; /* serial of next format */
|
|
|
|
/* message fields <design/message>, <code/message.c> */
|
|
RingStruct messageRing; /* ring of pending messages */
|
|
BT enabledMessageTypes; /* map of which types are enabled */
|
|
Count droppedMessages; /* <design/message-gc#.lifecycle> */
|
|
|
|
/* finalization fields <design/finalize>, <code/poolmrg.c> */
|
|
Bool isFinalPool; /* indicator for finalPool */
|
|
Pool finalPool; /* either NULL or an MRG pool */
|
|
|
|
/* thread fields <code/thread.c> */
|
|
RingStruct threadRing; /* ring of attached threads */
|
|
RingStruct deadRing; /* ring of dead threads */
|
|
Serial threadSerial; /* serial of next thread */
|
|
|
|
ShieldStruct shieldStruct;
|
|
|
|
/* trace fields <code/trace.c> */
|
|
TraceSet busyTraces; /* set of running traces */
|
|
TraceSet flippedTraces; /* set of running and flipped traces */
|
|
TraceStruct trace[TraceLIMIT]; /* trace structures. See
|
|
<design/trace#.instance.limit> */
|
|
|
|
/* trace ancillary fields <code/traceanc.c> */
|
|
TraceStartMessage tsMessage[TraceLIMIT]; /* <design/message-gc> */
|
|
TraceMessage tMessage[TraceLIMIT]; /* <design/message-gc> */
|
|
|
|
/* policy fields */
|
|
double tracedWork;
|
|
double tracedTime;
|
|
Clock lastWorldCollect;
|
|
|
|
RingStruct greyRing[RankLIMIT]; /* ring of grey segments at each rank */
|
|
RingStruct chainRing; /* ring of chains */
|
|
|
|
struct HistoryStruct historyStruct;
|
|
|
|
Bool emergency; /* garbage collect in emergency mode? */
|
|
|
|
/* Stack scanning -- see <design/stack-scan> */
|
|
void *stackWarm; /* NULL or stack pointer warmer than
|
|
mutator state. */
|
|
|
|
Sig sig;
|
|
} ArenaStruct;
|
|
|
|
|
|
typedef struct AllocPatternStruct {
|
|
char dummy;
|
|
} AllocPatternStruct;
|
|
|
|
|
|
#endif /* mpmst_h */
|
|
|
|
|
|
/* C. COPYRIGHT AND LICENSE
|
|
*
|
|
* Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|