PostgreSQL Source Code git master
bump.c File Reference
#include "postgres.h"
#include "lib/ilist.h"
#include "port/pg_bitutils.h"
#include "utils/memdebug.h"
#include "utils/memutils.h"
#include "utils/memutils_memorychunk.h"
#include "utils/memutils_internal.h"
Include dependency graph for bump.c:

Go to the source code of this file.

Data Structures

struct  BumpContext
 
struct  BumpBlock
 

Macros

#define Bump_BLOCKHDRSZ   MAXALIGN(sizeof(BumpBlock))
 
#define Bump_CHUNKHDRSZ   0
 
#define Bump_CHUNK_FRACTION   8
 
#define KeeperBlock(set)
 
#define IsKeeperBlock(set, blk)   (KeeperBlock(set) == (blk))
 
#define BumpIsValid(set)    (PointerIsValid(set) && IsA(set, BumpContext))
 
#define ExternalChunkGetBlock(chunk)    (BumpBlock *) ((char *) chunk - Bump_BLOCKHDRSZ)
 

Typedefs

typedef struct BumpBlock BumpBlock
 
typedef struct BumpContext BumpContext
 

Functions

static void BumpBlockInit (BumpContext *context, BumpBlock *block, Size blksize)
 
static bool BumpBlockIsEmpty (BumpBlock *block)
 
static void BumpBlockMarkEmpty (BumpBlock *block)
 
static Size BumpBlockFreeBytes (BumpBlock *block)
 
static void BumpBlockFree (BumpContext *set, BumpBlock *block)
 
MemoryContext BumpContextCreate (MemoryContext parent, const char *name, Size minContextSize, Size initBlockSize, Size maxBlockSize)
 
void BumpReset (MemoryContext context)
 
void BumpDelete (MemoryContext context)
 
static pg_noinline void * BumpAllocLarge (MemoryContext context, Size size, int flags)
 
static void * BumpAllocChunkFromBlock (MemoryContext context, BumpBlock *block, Size size, Size chunk_size)
 
static pg_noinline void * BumpAllocFromNewBlock (MemoryContext context, Size size, int flags, Size chunk_size)
 
void * BumpAlloc (MemoryContext context, Size size, int flags)
 
void BumpFree (void *pointer)
 
void * BumpRealloc (void *pointer, Size size, int flags)
 
MemoryContext BumpGetChunkContext (void *pointer)
 
Size BumpGetChunkSpace (void *pointer)
 
bool BumpIsEmpty (MemoryContext context)
 
void BumpStats (MemoryContext context, MemoryStatsPrintFunc printfunc, void *passthru, MemoryContextCounters *totals, bool print_to_stderr)
 

Macro Definition Documentation

◆ Bump_BLOCKHDRSZ

#define Bump_BLOCKHDRSZ   MAXALIGN(sizeof(BumpBlock))

Definition at line 48 of file bump.c.

◆ Bump_CHUNK_FRACTION

#define Bump_CHUNK_FRACTION   8

Definition at line 57 of file bump.c.

◆ Bump_CHUNKHDRSZ

#define Bump_CHUNKHDRSZ   0

Definition at line 54 of file bump.c.

◆ BumpIsValid

#define BumpIsValid (   set)     (PointerIsValid(set) && IsA(set, BumpContext))

Definition at line 100 of file bump.c.

◆ ExternalChunkGetBlock

#define ExternalChunkGetBlock (   chunk)     (BumpBlock *) ((char *) chunk - Bump_BLOCKHDRSZ)

Definition at line 108 of file bump.c.

◆ IsKeeperBlock

#define IsKeeperBlock (   set,
  blk 
)    (KeeperBlock(set) == (blk))

Definition at line 62 of file bump.c.

◆ KeeperBlock

#define KeeperBlock (   set)
Value:
((BumpBlock *) ((char *) (set) + \
MAXALIGN(sizeof(BumpContext))))
#define MAXALIGN(LEN)
Definition: c.h:782
Definition: bump.c:87

Definition at line 60 of file bump.c.

Typedef Documentation

◆ BumpBlock

typedef struct BumpBlock BumpBlock

Definition at line 64 of file bump.c.

◆ BumpContext

typedef struct BumpContext BumpContext

Function Documentation

◆ BumpAlloc()

void * BumpAlloc ( MemoryContext  context,
Size  size,
int  flags 
)

Definition at line 491 of file bump.c.

492{
493 BumpContext *set = (BumpContext *) context;
494 BumpBlock *block;
495 Size chunk_size;
496 Size required_size;
497
498 Assert(BumpIsValid(set));
499
500#ifdef MEMORY_CONTEXT_CHECKING
501 /* ensure there's always space for the sentinel byte */
502 chunk_size = MAXALIGN(size + 1);
503#else
504 chunk_size = MAXALIGN(size);
505#endif
506
507 /*
508 * If requested size exceeds maximum for chunks we hand the request off to
509 * BumpAllocLarge().
510 */
511 if (chunk_size > set->allocChunkLimit)
512 return BumpAllocLarge(context, size, flags);
513
514 required_size = chunk_size + Bump_CHUNKHDRSZ;
515
516 /*
517 * Not an oversized chunk. We try to first make use of the latest block,
518 * but if there's not enough space in it we must allocate a new block.
519 */
520 block = dlist_container(BumpBlock, node, dlist_head_node(&set->blocks));
521
522 if (BumpBlockFreeBytes(block) < required_size)
523 return BumpAllocFromNewBlock(context, size, flags, chunk_size);
524
525 /* The current block has space, so just allocate chunk there. */
526 return BumpAllocChunkFromBlock(context, block, size, chunk_size);
527}
#define Bump_CHUNKHDRSZ
Definition: bump.c:54
static pg_noinline void * BumpAllocLarge(MemoryContext context, Size size, int flags)
Definition: bump.c:293
#define BumpIsValid(set)
Definition: bump.c:100
static pg_noinline void * BumpAllocFromNewBlock(MemoryContext context, Size size, int flags, Size chunk_size)
Definition: bump.c:430
static void * BumpAllocChunkFromBlock(MemoryContext context, BumpBlock *block, Size size, Size chunk_size)
Definition: bump.c:371
static Size BumpBlockFreeBytes(BumpBlock *block)
Definition: bump.c:585
size_t Size
Definition: c.h:576
Assert(PointerIsAligned(start, uint64))
static dlist_node * dlist_head_node(dlist_head *head)
Definition: ilist.h:565
#define dlist_container(type, membername, ptr)
Definition: ilist.h:593
dlist_head blocks
Definition: bump.c:76
uint32 allocChunkLimit
Definition: bump.c:74

References BumpContext::allocChunkLimit, Assert(), BumpContext::blocks, Bump_CHUNKHDRSZ, BumpAllocChunkFromBlock(), BumpAllocFromNewBlock(), BumpAllocLarge(), BumpBlockFreeBytes(), BumpIsValid, dlist_container, dlist_head_node(), and MAXALIGN.

◆ BumpAllocChunkFromBlock()

static void * BumpAllocChunkFromBlock ( MemoryContext  context,
BumpBlock block,
Size  size,
Size  chunk_size 
)
inlinestatic

Definition at line 371 of file bump.c.

373{
374#ifdef MEMORY_CONTEXT_CHECKING
375 MemoryChunk *chunk;
376#else
377 void *ptr;
378#endif
379
380 /* validate we've been given a block with enough free space */
381 Assert(block != NULL);
382 Assert((block->endptr - block->freeptr) >= Bump_CHUNKHDRSZ + chunk_size);
383
384#ifdef MEMORY_CONTEXT_CHECKING
385 chunk = (MemoryChunk *) block->freeptr;
386#else
387 ptr = (void *) block->freeptr;
388#endif
389
390 /* point the freeptr beyond this chunk */
391 block->freeptr += (Bump_CHUNKHDRSZ + chunk_size);
392 Assert(block->freeptr <= block->endptr);
393
394#ifdef MEMORY_CONTEXT_CHECKING
395 /* Prepare to initialize the chunk header. */
397
398 MemoryChunkSetHdrMask(chunk, block, chunk_size, MCTX_BUMP_ID);
399 chunk->requested_size = size;
400 /* set mark to catch clobber of "unused" space */
401 Assert(size < chunk_size);
402 set_sentinel(MemoryChunkGetPointer(chunk), size);
403
404#ifdef RANDOMIZE_ALLOCATED_MEMORY
405 /* fill the allocated space with junk */
406 randomize_mem((char *) MemoryChunkGetPointer(chunk), size);
407#endif
408
409 /* Ensure any padding bytes are marked NOACCESS. */
411 chunk_size - size);
412
413 /* Disallow access to the chunk header. */
415
416 return MemoryChunkGetPointer(chunk);
417#else
418 return ptr;
419#endif /* MEMORY_CONTEXT_CHECKING */
420}
#define VALGRIND_MAKE_MEM_NOACCESS(addr, size)
Definition: memdebug.h:27
#define VALGRIND_MAKE_MEM_UNDEFINED(addr, size)
Definition: memdebug.h:28
@ MCTX_BUMP_ID
#define MemoryChunkGetPointer(c)
static void MemoryChunkSetHdrMask(MemoryChunk *chunk, void *block, Size value, MemoryContextMethodID methodid)
char * endptr
Definition: bump.c:93
char * freeptr
Definition: bump.c:92

References Assert(), Bump_CHUNKHDRSZ, BumpBlock::endptr, BumpBlock::freeptr, MCTX_BUMP_ID, MemoryChunkGetPointer, MemoryChunkSetHdrMask(), VALGRIND_MAKE_MEM_NOACCESS, and VALGRIND_MAKE_MEM_UNDEFINED.

Referenced by BumpAlloc(), and BumpAllocFromNewBlock().

◆ BumpAllocFromNewBlock()

static pg_noinline void * BumpAllocFromNewBlock ( MemoryContext  context,
Size  size,
int  flags,
Size  chunk_size 
)
static

Definition at line 430 of file bump.c.

432{
433 BumpContext *set = (BumpContext *) context;
434 BumpBlock *block;
435 Size blksize;
436 Size required_size;
437
438 /*
439 * The first such block has size initBlockSize, and we double the space in
440 * each succeeding block, but not more than maxBlockSize.
441 */
442 blksize = set->nextBlockSize;
443 set->nextBlockSize <<= 1;
444 if (set->nextBlockSize > set->maxBlockSize)
445 set->nextBlockSize = set->maxBlockSize;
446
447 /* we'll need space for the chunk, chunk hdr and block hdr */
448 required_size = chunk_size + Bump_CHUNKHDRSZ + Bump_BLOCKHDRSZ;
449 /* round the size up to the next power of 2 */
450 if (blksize < required_size)
451 blksize = pg_nextpower2_size_t(required_size);
452
453 block = (BumpBlock *) malloc(blksize);
454
455 if (block == NULL)
456 return MemoryContextAllocationFailure(context, size, flags);
457
458 context->mem_allocated += blksize;
459
460 /* initialize the new block */
461 BumpBlockInit(set, block, blksize);
462
463 /* add it to the doubly-linked list of blocks */
464 dlist_push_head(&set->blocks, &block->node);
465
466 return BumpAllocChunkFromBlock(context, block, size, chunk_size);
467}
static void BumpBlockInit(BumpContext *context, BumpBlock *block, Size blksize)
Definition: bump.c:535
#define Bump_BLOCKHDRSZ
Definition: bump.c:48
#define malloc(a)
Definition: header.h:50
static void dlist_push_head(dlist_head *head, dlist_node *node)
Definition: ilist.h:347
void * MemoryContextAllocationFailure(MemoryContext context, Size size, int flags)
Definition: mcxt.c:1147
#define pg_nextpower2_size_t
Definition: pg_bitutils.h:415
dlist_node node
Definition: bump.c:88
uint32 maxBlockSize
Definition: bump.c:72
uint32 nextBlockSize
Definition: bump.c:73

References BumpContext::blocks, Bump_BLOCKHDRSZ, Bump_CHUNKHDRSZ, BumpAllocChunkFromBlock(), BumpBlockInit(), dlist_push_head(), malloc, BumpContext::maxBlockSize, MemoryContextData::mem_allocated, MemoryContextAllocationFailure(), BumpContext::nextBlockSize, BumpBlock::node, and pg_nextpower2_size_t.

Referenced by BumpAlloc().

◆ BumpAllocLarge()

static pg_noinline void * BumpAllocLarge ( MemoryContext  context,
Size  size,
int  flags 
)
static

Definition at line 293 of file bump.c.

294{
295 BumpContext *set = (BumpContext *) context;
296 BumpBlock *block;
297#ifdef MEMORY_CONTEXT_CHECKING
298 MemoryChunk *chunk;
299#endif
300 Size chunk_size;
301 Size required_size;
302 Size blksize;
303
304 /* validate 'size' is within the limits for the given 'flags' */
305 MemoryContextCheckSize(context, size, flags);
306
307#ifdef MEMORY_CONTEXT_CHECKING
308 /* ensure there's always space for the sentinel byte */
309 chunk_size = MAXALIGN(size + 1);
310#else
311 chunk_size = MAXALIGN(size);
312#endif
313
314 required_size = chunk_size + Bump_CHUNKHDRSZ;
315 blksize = required_size + Bump_BLOCKHDRSZ;
316
317 block = (BumpBlock *) malloc(blksize);
318 if (block == NULL)
319 return NULL;
320
321 context->mem_allocated += blksize;
322
323 /* the block is completely full */
324 block->freeptr = block->endptr = ((char *) block) + blksize;
325
326#ifdef MEMORY_CONTEXT_CHECKING
327 /* block with a single (used) chunk */
328 block->context = set;
329
330 chunk = (MemoryChunk *) (((char *) block) + Bump_BLOCKHDRSZ);
331
332 /* mark the MemoryChunk as externally managed */
334
335 chunk->requested_size = size;
336 /* set mark to catch clobber of "unused" space */
337 Assert(size < chunk_size);
338 set_sentinel(MemoryChunkGetPointer(chunk), size);
339#endif
340#ifdef RANDOMIZE_ALLOCATED_MEMORY
341 /* fill the allocated space with junk */
342 randomize_mem((char *) MemoryChunkGetPointer(chunk), size);
343#endif
344
345 /*
346 * Add the block to the tail of allocated blocks list. The current block
347 * is left at the head of the list as it may still have space for
348 * non-large allocations.
349 */
350 dlist_push_tail(&set->blocks, &block->node);
351
352#ifdef MEMORY_CONTEXT_CHECKING
353 /* Ensure any padding bytes are marked NOACCESS. */
355 chunk_size - size);
356
357 /* Disallow access to the chunk header. */
359
360 return MemoryChunkGetPointer(chunk);
361#else
362 return (void *) (((char *) block) + Bump_BLOCKHDRSZ);
363#endif
364}
static void dlist_push_tail(dlist_head *head, dlist_node *node)
Definition: ilist.h:364
static void MemoryContextCheckSize(MemoryContext context, Size size, int flags)
static void MemoryChunkSetHdrMaskExternal(MemoryChunk *chunk, MemoryContextMethodID methodid)

References Assert(), BumpContext::blocks, Bump_BLOCKHDRSZ, Bump_CHUNKHDRSZ, dlist_push_tail(), BumpBlock::endptr, BumpBlock::freeptr, malloc, MAXALIGN, MCTX_BUMP_ID, MemoryContextData::mem_allocated, MemoryChunkGetPointer, MemoryChunkSetHdrMaskExternal(), MemoryContextCheckSize(), BumpBlock::node, and VALGRIND_MAKE_MEM_NOACCESS.

Referenced by BumpAlloc().

◆ BumpBlockFree()

static void BumpBlockFree ( BumpContext set,
BumpBlock block 
)
inlinestatic

Definition at line 595 of file bump.c.

596{
597 /* Make sure nobody tries to free the keeper block */
598 Assert(!IsKeeperBlock(set, block));
599
600 /* release the block from the list of blocks */
601 dlist_delete(&block->node);
602
603 ((MemoryContext) set)->mem_allocated -= ((char *) block->endptr - (char *) block);
604
605#ifdef CLOBBER_FREED_MEMORY
606 wipe_mem(block, ((char *) block->endptr - (char *) block));
607#endif
608
609 free(block);
610}
#define IsKeeperBlock(set, blk)
Definition: bump.c:62
#define free(a)
Definition: header.h:65
static void dlist_delete(dlist_node *node)
Definition: ilist.h:405
struct MemoryContextData * MemoryContext
Definition: palloc.h:36

References Assert(), dlist_delete(), BumpBlock::endptr, free, IsKeeperBlock, and BumpBlock::node.

Referenced by BumpReset().

◆ BumpBlockFreeBytes()

static Size BumpBlockFreeBytes ( BumpBlock block)
inlinestatic

Definition at line 585 of file bump.c.

586{
587 return (block->endptr - block->freeptr);
588}

References BumpBlock::endptr, and BumpBlock::freeptr.

Referenced by BumpAlloc().

◆ BumpBlockInit()

static void BumpBlockInit ( BumpContext context,
BumpBlock block,
Size  blksize 
)
inlinestatic

Definition at line 535 of file bump.c.

536{
537#ifdef MEMORY_CONTEXT_CHECKING
538 block->context = context;
539#endif
540 block->freeptr = ((char *) block) + Bump_BLOCKHDRSZ;
541 block->endptr = ((char *) block) + blksize;
542
543 /* Mark unallocated space NOACCESS. */
545}

References Bump_BLOCKHDRSZ, BumpBlock::endptr, BumpBlock::freeptr, and VALGRIND_MAKE_MEM_NOACCESS.

Referenced by BumpAllocFromNewBlock(), and BumpContextCreate().

◆ BumpBlockIsEmpty()

static bool BumpBlockIsEmpty ( BumpBlock block)
inlinestatic

Definition at line 552 of file bump.c.

553{
554 /* it's empty if the freeptr has not moved */
555 return (block->freeptr == ((char *) block + Bump_BLOCKHDRSZ));
556}

References Bump_BLOCKHDRSZ, and BumpBlock::freeptr.

Referenced by BumpIsEmpty().

◆ BumpBlockMarkEmpty()

static void BumpBlockMarkEmpty ( BumpBlock block)
inlinestatic

Definition at line 563 of file bump.c.

564{
565#if defined(USE_VALGRIND) || defined(CLOBBER_FREED_MEMORY)
566 char *datastart = ((char *) block) + Bump_BLOCKHDRSZ;
567#endif
568
569#ifdef CLOBBER_FREED_MEMORY
570 wipe_mem(datastart, block->freeptr - datastart);
571#else
572 /* wipe_mem() would have done this */
573 VALGRIND_MAKE_MEM_NOACCESS(datastart, block->freeptr - datastart);
574#endif
575
576 /* Reset the block, but don't return it to malloc */
577 block->freeptr = ((char *) block) + Bump_BLOCKHDRSZ;
578}

References Bump_BLOCKHDRSZ, BumpBlock::freeptr, and VALGRIND_MAKE_MEM_NOACCESS.

Referenced by BumpReset().

◆ BumpContextCreate()

MemoryContext BumpContextCreate ( MemoryContext  parent,
const char *  name,
Size  minContextSize,
Size  initBlockSize,
Size  maxBlockSize 
)

Definition at line 131 of file bump.c.

133{
134 Size firstBlockSize;
135 Size allocSize;
136 BumpContext *set;
137 BumpBlock *block;
138
139 /* ensure MemoryChunk's size is properly maxaligned */
141 "sizeof(MemoryChunk) is not maxaligned");
142
143 /*
144 * First, validate allocation parameters. Asserts seem sufficient because
145 * nobody varies their parameters at runtime. We somewhat arbitrarily
146 * enforce a minimum 1K block size. We restrict the maximum block size to
147 * MEMORYCHUNK_MAX_BLOCKOFFSET as MemoryChunks are limited to this in
148 * regards to addressing the offset between the chunk and the block that
149 * the chunk is stored on. We would be unable to store the offset between
150 * the chunk and block for any chunks that were beyond
151 * MEMORYCHUNK_MAX_BLOCKOFFSET bytes into the block if the block was to be
152 * larger than this.
153 */
154 Assert(initBlockSize == MAXALIGN(initBlockSize) &&
155 initBlockSize >= 1024);
156 Assert(maxBlockSize == MAXALIGN(maxBlockSize) &&
157 maxBlockSize >= initBlockSize &&
158 AllocHugeSizeIsValid(maxBlockSize)); /* must be safe to double */
159 Assert(minContextSize == 0 ||
160 (minContextSize == MAXALIGN(minContextSize) &&
161 minContextSize >= 1024 &&
162 minContextSize <= maxBlockSize));
163 Assert(maxBlockSize <= MEMORYCHUNK_MAX_BLOCKOFFSET);
164
165 /* Determine size of initial block */
166 allocSize = MAXALIGN(sizeof(BumpContext)) + Bump_BLOCKHDRSZ +
168 if (minContextSize != 0)
169 allocSize = Max(allocSize, minContextSize);
170 else
171 allocSize = Max(allocSize, initBlockSize);
172
173 /*
174 * Allocate the initial block. Unlike other bump.c blocks, it starts with
175 * the context header and its block header follows that.
176 */
177 set = (BumpContext *) malloc(allocSize);
178 if (set == NULL)
179 {
182 (errcode(ERRCODE_OUT_OF_MEMORY),
183 errmsg("out of memory"),
184 errdetail("Failed while creating memory context \"%s\".",
185 name)));
186 }
187
188 /*
189 * Avoid writing code that can fail between here and MemoryContextCreate;
190 * we'd leak the header and initial block if we ereport in this stretch.
191 */
192 dlist_init(&set->blocks);
193
194 /* Fill in the initial block's block header */
195 block = KeeperBlock(set);
196 /* determine the block size and initialize it */
197 firstBlockSize = allocSize - MAXALIGN(sizeof(BumpContext));
198 BumpBlockInit(set, block, firstBlockSize);
199
200 /* add it to the doubly-linked list of blocks */
201 dlist_push_head(&set->blocks, &block->node);
202
203 /*
204 * Fill in BumpContext-specific header fields. The Asserts above should
205 * ensure that these all fit inside a uint32.
206 */
207 set->initBlockSize = (uint32) initBlockSize;
208 set->maxBlockSize = (uint32) maxBlockSize;
209 set->nextBlockSize = (uint32) initBlockSize;
210
211 /*
212 * Compute the allocation chunk size limit for this context.
213 *
214 * Limit the maximum size a non-dedicated chunk can be so that we can fit
215 * at least Bump_CHUNK_FRACTION of chunks this big onto the maximum sized
216 * block. We must further limit this value so that it's no more than
217 * MEMORYCHUNK_MAX_VALUE. We're unable to have non-external chunks larger
218 * than that value as we store the chunk size in the MemoryChunk 'value'
219 * field in the call to MemoryChunkSetHdrMask().
220 */
221 set->allocChunkLimit = Min(maxBlockSize, MEMORYCHUNK_MAX_VALUE);
222 while ((Size) (set->allocChunkLimit + Bump_CHUNKHDRSZ) >
223 (Size) ((Size) (maxBlockSize - Bump_BLOCKHDRSZ) / Bump_CHUNK_FRACTION))
224 set->allocChunkLimit >>= 1;
225
226 /* Finally, do the type-independent part of context creation */
227 MemoryContextCreate((MemoryContext) set, T_BumpContext, MCTX_BUMP_ID,
228 parent, name);
229
230 ((MemoryContext) set)->mem_allocated = allocSize;
231
232 return (MemoryContext) set;
233}
#define Bump_CHUNK_FRACTION
Definition: bump.c:57
#define KeeperBlock(set)
Definition: bump.c:60
#define Min(x, y)
Definition: c.h:975
#define Max(x, y)
Definition: c.h:969
uint32_t uint32
Definition: c.h:502
#define StaticAssertDecl(condition, errmessage)
Definition: c.h:907
int errdetail(const char *fmt,...)
Definition: elog.c:1203
int errcode(int sqlerrcode)
Definition: elog.c:853
int errmsg(const char *fmt,...)
Definition: elog.c:1070
#define ERROR
Definition: elog.h:39
#define ereport(elevel,...)
Definition: elog.h:149
static void dlist_init(dlist_head *head)
Definition: ilist.h:314
void MemoryContextCreate(MemoryContext node, NodeTag tag, MemoryContextMethodID method_id, MemoryContext parent, const char *name)
Definition: mcxt.c:1100
MemoryContext TopMemoryContext
Definition: mcxt.c:149
void MemoryContextStats(MemoryContext context)
Definition: mcxt.c:814
#define AllocHugeSizeIsValid(size)
Definition: memutils.h:49
#define MEMORYCHUNK_MAX_BLOCKOFFSET
#define MEMORYCHUNK_MAX_VALUE
uint32 initBlockSize
Definition: bump.c:71
const char * name

References BumpContext::allocChunkLimit, AllocHugeSizeIsValid, Assert(), BumpContext::blocks, Bump_BLOCKHDRSZ, Bump_CHUNK_FRACTION, Bump_CHUNKHDRSZ, BumpBlockInit(), dlist_init(), dlist_push_head(), ereport, errcode(), errdetail(), errmsg(), ERROR, BumpContext::initBlockSize, KeeperBlock, malloc, Max, MAXALIGN, BumpContext::maxBlockSize, MCTX_BUMP_ID, MEMORYCHUNK_MAX_BLOCKOFFSET, MEMORYCHUNK_MAX_VALUE, MemoryContextCreate(), MemoryContextStats(), Min, name, BumpContext::nextBlockSize, BumpBlock::node, StaticAssertDecl, and TopMemoryContext.

Referenced by TidStoreCreateLocal(), and tuplesort_begin_batch().

◆ BumpDelete()

void BumpDelete ( MemoryContext  context)

Definition at line 278 of file bump.c.

279{
280 /* Reset to release all releasable BumpBlocks */
281 BumpReset(context);
282 /* And free the context header and keeper block */
283 free(context);
284}
void BumpReset(MemoryContext context)
Definition: bump.c:243

References BumpReset(), and free.

◆ BumpFree()

void BumpFree ( void *  pointer)

Definition at line 617 of file bump.c.

618{
619 elog(ERROR, "%s is not supported by the bump memory allocator", "pfree");
620}
#define elog(elevel,...)
Definition: elog.h:225

References elog, and ERROR.

◆ BumpGetChunkContext()

MemoryContext BumpGetChunkContext ( void *  pointer)

Definition at line 638 of file bump.c.

639{
640 elog(ERROR, "%s is not supported by the bump memory allocator", "GetMemoryChunkContext");
641 return NULL; /* keep compiler quiet */
642}

References elog, and ERROR.

◆ BumpGetChunkSpace()

Size BumpGetChunkSpace ( void *  pointer)

Definition at line 649 of file bump.c.

650{
651 elog(ERROR, "%s is not supported by the bump memory allocator", "GetMemoryChunkSpace");
652 return 0; /* keep compiler quiet */
653}

References elog, and ERROR.

◆ BumpIsEmpty()

bool BumpIsEmpty ( MemoryContext  context)

Definition at line 660 of file bump.c.

661{
662 BumpContext *set = (BumpContext *) context;
663 dlist_iter iter;
664
665 Assert(BumpIsValid(set));
666
667 dlist_foreach(iter, &set->blocks)
668 {
669 BumpBlock *block = dlist_container(BumpBlock, node, iter.cur);
670
671 if (!BumpBlockIsEmpty(block))
672 return false;
673 }
674
675 return true;
676}
static bool BumpBlockIsEmpty(BumpBlock *block)
Definition: bump.c:552
#define dlist_foreach(iter, lhead)
Definition: ilist.h:623
dlist_node * cur
Definition: ilist.h:179

References Assert(), BumpContext::blocks, BumpBlockIsEmpty(), BumpIsValid, dlist_iter::cur, dlist_container, and dlist_foreach.

◆ BumpRealloc()

void * BumpRealloc ( void *  pointer,
Size  size,
int  flags 
)

Definition at line 627 of file bump.c.

628{
629 elog(ERROR, "%s is not supported by the bump memory allocator", "realloc");
630 return NULL; /* keep compiler quiet */
631}

References elog, and ERROR.

◆ BumpReset()

void BumpReset ( MemoryContext  context)

Definition at line 243 of file bump.c.

244{
245 BumpContext *set = (BumpContext *) context;
246 dlist_mutable_iter miter;
247
248 Assert(BumpIsValid(set));
249
250#ifdef MEMORY_CONTEXT_CHECKING
251 /* Check for corruption and leaks before freeing */
252 BumpCheck(context);
253#endif
254
255 dlist_foreach_modify(miter, &set->blocks)
256 {
257 BumpBlock *block = dlist_container(BumpBlock, node, miter.cur);
258
259 if (IsKeeperBlock(set, block))
260 BumpBlockMarkEmpty(block);
261 else
262 BumpBlockFree(set, block);
263 }
264
265 /* Reset block size allocation sequence, too */
266 set->nextBlockSize = set->initBlockSize;
267
268 /* Ensure there is only 1 item in the dlist */
271}
static void BumpBlockFree(BumpContext *set, BumpBlock *block)
Definition: bump.c:595
static void BumpBlockMarkEmpty(BumpBlock *block)
Definition: bump.c:563
static bool dlist_has_next(const dlist_head *head, const dlist_node *node)
Definition: ilist.h:503
#define dlist_foreach_modify(iter, lhead)
Definition: ilist.h:640
static bool dlist_is_empty(const dlist_head *head)
Definition: ilist.h:336
dlist_node * cur
Definition: ilist.h:200

References Assert(), BumpContext::blocks, BumpBlockFree(), BumpBlockMarkEmpty(), BumpIsValid, dlist_mutable_iter::cur, dlist_container, dlist_foreach_modify, dlist_has_next(), dlist_head_node(), dlist_is_empty(), BumpContext::initBlockSize, IsKeeperBlock, and BumpContext::nextBlockSize.

Referenced by BumpDelete().

◆ BumpStats()

void BumpStats ( MemoryContext  context,
MemoryStatsPrintFunc  printfunc,
void *  passthru,
MemoryContextCounters totals,
bool  print_to_stderr 
)

Definition at line 688 of file bump.c.

690{
691 BumpContext *set = (BumpContext *) context;
692 Size nblocks = 0;
693 Size totalspace = 0;
694 Size freespace = 0;
695 dlist_iter iter;
696
697 Assert(BumpIsValid(set));
698
699 dlist_foreach(iter, &set->blocks)
700 {
701 BumpBlock *block = dlist_container(BumpBlock, node, iter.cur);
702
703 nblocks++;
704 totalspace += (block->endptr - (char *) block);
705 freespace += (block->endptr - block->freeptr);
706 }
707
708 if (printfunc)
709 {
710 char stats_string[200];
711
712 snprintf(stats_string, sizeof(stats_string),
713 "%zu total in %zu blocks; %zu free; %zu used",
714 totalspace, nblocks, freespace, totalspace - freespace);
715 printfunc(context, passthru, stats_string, print_to_stderr);
716 }
717
718 if (totals)
719 {
720 totals->nblocks += nblocks;
721 totals->totalspace += totalspace;
722 totals->freespace += freespace;
723 }
724}
#define snprintf
Definition: port.h:239

References Assert(), BumpContext::blocks, BumpIsValid, dlist_iter::cur, dlist_container, dlist_foreach, BumpBlock::endptr, BumpBlock::freeptr, MemoryContextCounters::freespace, MemoryContextCounters::nblocks, snprintf, and MemoryContextCounters::totalspace.