Changes in libcfa/src/heap.cfa [13fece5:98d6965d]
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libcfa/src/heap.cfa (modified) (59 diffs)
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libcfa/src/heap.cfa
r13fece5 r98d6965d 5 5 // file "LICENCE" distributed with Cforall. 6 6 // 7 // heap.c fa--7 // heap.c -- 8 8 // 9 9 // Author : Peter A. Buhr 10 10 // Created On : Tue Dec 19 21:58:35 2017 11 11 // Last Modified By : Peter A. Buhr 12 // Last Modified On : Wed Dec 16 12:28:25 202013 // Update Count : 102312 // Last Modified On : Sun Dec 8 21:01:31 2019 13 // Update Count : 647 14 14 // 15 15 16 16 #include <unistd.h> // sbrk, sysconf 17 #include <stdlib.h> // EXIT_FAILURE18 17 #include <stdbool.h> // true, false 19 18 #include <stdio.h> // snprintf, fileno 20 19 #include <errno.h> // errno 21 20 #include <string.h> // memset, memcpy 22 #include <limits.h> // ULONG_MAX 23 #include <malloc.h> // memalign, malloc_usable_size 21 extern "C" { 24 22 #include <sys/mman.h> // mmap, munmap 25 26 #include "bits/align.hfa" // libAlign 23 } // extern "C" 24 25 // #comment TD : Many of these should be merged into math I believe 26 #include "bits/align.hfa" // libPow2 27 27 #include "bits/defs.hfa" // likely, unlikely 28 28 #include "bits/locks.hfa" // __spinlock_t 29 29 #include "startup.hfa" // STARTUP_PRIORITY_MEMORY 30 #include "math.hfa" // ceiling 31 #include "bitmanip.hfa" // is_pow2, ceiling2 30 //#include "stdlib.hfa" // bsearchl 31 #include "malloc.h" 32 33 #define MIN(x, y) (y > x ? x : y) 32 34 33 35 static bool traceHeap = false; … … 72 74 // Define the default extension heap amount in units of bytes. When the uC++ supplied heap reaches the brk address, 73 75 // the brk address is extended by the extension amount. 74 __CFA_DEFAULT_HEAP_EXPANSION__ = (1 0* 1024 * 1024),76 __CFA_DEFAULT_HEAP_EXPANSION__ = (1 * 1024 * 1024), 75 77 76 78 // Define the mmap crossover point during allocation. Allocations less than this amount are allocated from buckets; … … 89 91 90 92 #ifdef __CFA_DEBUG__ 91 static size_t allocUnfreed;// running total of allocations minus frees93 static unsigned int allocFree; // running total of allocations minus frees 92 94 93 95 static void prtUnfreed() { 94 if ( alloc Unfreed!= 0 ) {96 if ( allocFree != 0 ) { 95 97 // DO NOT USE STREAMS AS THEY MAY BE UNAVAILABLE AT THIS POINT. 96 98 char helpText[512]; 97 int len = snprintf( helpText, sizeof(helpText), "CFA warning (UNIX pid:%ld) : program terminating with % zu(0x%zx) bytes of storage allocated but not freed.\n"99 int len = snprintf( helpText, sizeof(helpText), "CFA warning (UNIX pid:%ld) : program terminating with %u(0x%x) bytes of storage allocated but not freed.\n" 98 100 "Possible cause is unfreed storage allocated by the program or system/library routines called from the program.\n", 99 (long int)getpid(), alloc Unfreed, allocUnfreed); // always print the UNIX pid101 (long int)getpid(), allocFree, allocFree ); // always print the UNIX pid 100 102 __cfaabi_bits_write( STDERR_FILENO, helpText, len ); // print debug/nodebug 101 103 } // if … … 104 106 extern "C" { 105 107 void heapAppStart() { // called by __cfaabi_appready_startup 106 alloc Unfreed= 0;108 allocFree = 0; 107 109 } // heapAppStart 108 110 … … 116 118 117 119 // statically allocated variables => zero filled. 118 size_t __page_size; // architecture pagesize 119 int __map_prot; // common mmap/mprotect protection 120 static size_t pageSize; // architecture pagesize 120 121 static size_t heapExpand; // sbrk advance 121 122 static size_t mmapStart; // cross over point for mmap … … 126 127 #define LOCKFREE 1 127 128 #define BUCKETLOCK SPINLOCK 128 #if BUCKETLOCK == SPINLOCK 129 #elif BUCKETLOCK == LOCKFREE 130 #include <stackLockFree.hfa> 131 #else 132 #error undefined lock type for bucket lock 129 #if BUCKETLOCK == LOCKFREE 130 #include <uStackLF.h> 133 131 #endif // LOCKFREE 134 132 … … 138 136 139 137 struct HeapManager { 138 // struct FreeHeader; // forward declaration 139 140 140 struct Storage { 141 141 struct Header { // header … … 145 145 struct { // 4-byte word => 8-byte header, 8-byte word => 16-byte header 146 146 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ && __SIZEOF_POINTER__ == 4 147 uint 64_t padding; // unused, force home/blocksize to overlay alignment in fake header147 uint32_t padding; // unused, force home/blocksize to overlay alignment in fake header 148 148 #endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ && __SIZEOF_POINTER__ == 4 149 149 150 150 union { 151 // FreeHeader * home; // allocated block points back to home locations (must overlay alignment) 152 // 2nd low-order bit => zero filled 151 // FreeHeader * home; // allocated block points back to home locations (must overlay alignment) 153 152 void * home; // allocated block points back to home locations (must overlay alignment) 154 153 size_t blockSize; // size for munmap (must overlay alignment) 155 #if BUCK ETLOCK == SPINLOCK154 #if BUCKLOCK == SPINLOCK 156 155 Storage * next; // freed block points next freed block of same size 157 156 #endif // SPINLOCK 158 157 }; 159 size_t size; // allocation size in bytes160 158 161 159 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && __SIZEOF_POINTER__ == 4 162 uint 64_t padding; // unused, force home/blocksize to overlay alignment in fake header160 uint32_t padding; // unused, force home/blocksize to overlay alignment in fake header 163 161 #endif // __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && __SIZEOF_POINTER__ == 4 164 162 }; 165 #if BUCKETLOCK == LOCKFREE 166 Link(Storage) next; // freed block points next freed block of same size (double-wide) 163 // future code 164 #if BUCKLOCK == LOCKFREE 165 Stack<Storage>::Link next; // freed block points next freed block of same size (double-wide) 167 166 #endif // LOCKFREE 168 167 }; 169 168 } real; // RealHeader 170 171 169 struct FakeHeader { 172 170 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 173 uint32_t alignment; // 1st low-order bit => fake header & alignment171 uint32_t alignment; // low-order bits of home/blockSize used for tricks 174 172 #endif // __ORDER_LITTLE_ENDIAN__ 175 173 … … 189 187 190 188 struct FreeHeader { 191 #if BUCK ETLOCK == SPINLOCK189 #if BUCKLOCK == SPINLOCK 192 190 __spinlock_t lock; // must be first field for alignment 193 191 Storage * freeList; 192 #elif BUCKLOCK == LOCKFREE 193 // future code 194 StackLF<Storage> freeList; 194 195 #else 195 StackLF(Storage) freeList;196 #endif // BUCKETLOCK196 #error undefined lock type for bucket lock 197 #endif // SPINLOCK 197 198 size_t blockSize; // size of allocations on this list 198 199 }; // FreeHeader … … 207 208 }; // HeapManager 208 209 209 #if BUCKETLOCK == LOCKFREE210 static inline {211 Link(HeapManager.Storage) * ?`next( HeapManager.Storage * this ) { return &this->header.kind.real.next; }212 void ?{}( HeapManager.FreeHeader & ) {}213 void ^?{}( HeapManager.FreeHeader & ) {}214 } // distribution215 #endif // LOCKFREE216 217 210 static inline size_t getKey( const HeapManager.FreeHeader & freeheader ) { return freeheader.blockSize; } 218 211 … … 221 214 #define __STATISTICS__ 222 215 223 // Size of array must harmonize with NoBucketSizes and individual bucket sizes must be multiple of 16. 224 // Smaller multiples of 16 and powers of 2 are common allocation sizes, so make them generate the minimum required bucket size. 225 // malloc(0) returns 0p, so no bucket is necessary for 0 bytes returning an address that can be freed. 216 // Bucket size must be multiple of 16. 217 // Powers of 2 are common allocation sizes, so make powers of 2 generate the minimum required size. 226 218 static const unsigned int bucketSizes[] @= { // different bucket sizes 227 16 + sizeof(HeapManager.Storage), 32 + sizeof(HeapManager.Storage), 48 + sizeof(HeapManager.Storage), 64 + sizeof(HeapManager.Storage), // 4228 96 + sizeof(HeapManager.Storage), 112 + sizeof(HeapManager.Storage), 128 + sizeof(HeapManager.Storage), // 3219 16, 32, 48, 64 + sizeof(HeapManager.Storage), // 4 220 96, 112, 128 + sizeof(HeapManager.Storage), // 3 229 221 160, 192, 224, 256 + sizeof(HeapManager.Storage), // 4 230 222 320, 384, 448, 512 + sizeof(HeapManager.Storage), // 4 … … 244 236 }; 245 237 246 static_assert( NoBucketSizes == sizeof(bucketSizes) / sizeof(bucketSizes[0] ), "size of bucket array wrong" );238 static_assert( NoBucketSizes == sizeof(bucketSizes) / sizeof(bucketSizes[0]), "size of bucket array wrong" ); 247 239 248 240 #ifdef FASTLOOKUP … … 251 243 #endif // FASTLOOKUP 252 244 253 static const off_t mmapFd = -1;// fake or actual fd for anonymous file245 static int mmapFd = -1; // fake or actual fd for anonymous file 254 246 #ifdef __CFA_DEBUG__ 255 247 static bool heapBoot = 0; // detect recursion during boot 256 248 #endif // __CFA_DEBUG__ 257 258 // The constructor for heapManager is called explicitly in memory_startup.259 249 static HeapManager heapManager __attribute__(( aligned (128) )) @= {}; // size of cache line to prevent false sharing 260 250 … … 262 252 #ifdef __STATISTICS__ 263 253 // Heap statistics counters. 254 static unsigned long long int mmap_storage; 255 static unsigned int mmap_calls; 256 static unsigned long long int munmap_storage; 257 static unsigned int munmap_calls; 258 static unsigned long long int sbrk_storage; 259 static unsigned int sbrk_calls; 260 static unsigned long long int malloc_storage; 264 261 static unsigned int malloc_calls; 265 static unsigned long long int malloc_storage;266 static unsigned int aalloc_calls;267 static unsigned long long int aalloc_storage;262 static unsigned long long int free_storage; 263 static unsigned int free_calls; 264 static unsigned long long int calloc_storage; 268 265 static unsigned int calloc_calls; 269 static unsigned long long int calloc_storage;266 static unsigned long long int memalign_storage; 270 267 static unsigned int memalign_calls; 271 static unsigned long long int memalign_storage; 272 static unsigned int amemalign_calls; 273 static unsigned long long int amemalign_storage; 268 static unsigned long long int cmemalign_storage; 274 269 static unsigned int cmemalign_calls; 275 static unsigned long long int cmemalign_storage; 276 static unsigned int resize_calls; 277 static unsigned long long int resize_storage; 270 static unsigned long long int realloc_storage; 278 271 static unsigned int realloc_calls; 279 static unsigned long long int realloc_storage;280 static unsigned int free_calls;281 static unsigned long long int free_storage;282 static unsigned int mmap_calls;283 static unsigned long long int mmap_storage;284 static unsigned int munmap_calls;285 static unsigned long long int munmap_storage;286 static unsigned int sbrk_calls;287 static unsigned long long int sbrk_storage;288 272 // Statistics file descriptor (changed by malloc_stats_fd). 289 static int stat _fd = STDERR_FILENO; // default stderr273 static int statfd = STDERR_FILENO; // default stderr 290 274 291 275 // Use "write" because streams may be shutdown when calls are made. 292 276 static void printStats() { 293 char helpText[ 1024];277 char helpText[512]; 294 278 __cfaabi_bits_print_buffer( STDERR_FILENO, helpText, sizeof(helpText), 295 279 "\nHeap statistics:\n" 296 280 " malloc: calls %u / storage %llu\n" 297 " aalloc: calls %u / storage %llu\n"298 281 " calloc: calls %u / storage %llu\n" 299 282 " memalign: calls %u / storage %llu\n" 300 " amemalign: calls %u / storage %llu\n"301 283 " cmemalign: calls %u / storage %llu\n" 302 " resize: calls %u / storage %llu\n"303 284 " realloc: calls %u / storage %llu\n" 304 285 " free: calls %u / storage %llu\n" … … 307 288 " sbrk: calls %u / storage %llu\n", 308 289 malloc_calls, malloc_storage, 309 aalloc_calls, aalloc_storage,310 290 calloc_calls, calloc_storage, 311 291 memalign_calls, memalign_storage, 312 amemalign_calls, amemalign_storage,313 292 cmemalign_calls, cmemalign_storage, 314 resize_calls, resize_storage,315 293 realloc_calls, realloc_storage, 316 294 free_calls, free_storage, … … 322 300 323 301 static int printStatsXML( FILE * stream ) { // see malloc_info 324 char helpText[ 1024];302 char helpText[512]; 325 303 int len = snprintf( helpText, sizeof(helpText), 326 304 "<malloc version=\"1\">\n" … … 329 307 "</sizes>\n" 330 308 "<total type=\"malloc\" count=\"%u\" size=\"%llu\"/>\n" 331 "<total type=\"aalloc\" count=\"%u\" size=\"%llu\"/>\n"332 309 "<total type=\"calloc\" count=\"%u\" size=\"%llu\"/>\n" 333 310 "<total type=\"memalign\" count=\"%u\" size=\"%llu\"/>\n" 334 "<total type=\"amemalign\" count=\"%u\" size=\"%llu\"/>\n"335 311 "<total type=\"cmemalign\" count=\"%u\" size=\"%llu\"/>\n" 336 "<total type=\"resize\" count=\"%u\" size=\"%llu\"/>\n"337 312 "<total type=\"realloc\" count=\"%u\" size=\"%llu\"/>\n" 338 313 "<total type=\"free\" count=\"%u\" size=\"%llu\"/>\n" … … 342 317 "</malloc>", 343 318 malloc_calls, malloc_storage, 344 aalloc_calls, aalloc_storage,345 319 calloc_calls, calloc_storage, 346 320 memalign_calls, memalign_storage, 347 amemalign_calls, amemalign_storage,348 321 cmemalign_calls, cmemalign_storage, 349 resize_calls, resize_storage,350 322 realloc_calls, realloc_storage, 351 323 free_calls, free_storage, … … 358 330 } // printStatsXML 359 331 #endif // __STATISTICS__ 332 333 334 // static inline void noMemory() { 335 // abort( "Heap memory exhausted at %zu bytes.\n" 336 // "Possible cause is very large memory allocation and/or large amount of unfreed storage allocated by the program or system/library routines.", 337 // ((char *)(sbrk( 0 )) - (char *)(heapManager.heapBegin)) ); 338 // } // noMemory 339 340 341 static inline void checkAlign( size_t alignment ) { 342 if ( alignment < libAlign() || ! libPow2( alignment ) ) { 343 abort( "Alignment %zu for memory allocation is less than %d and/or not a power of 2.", alignment, libAlign() ); 344 } // if 345 } // checkAlign 346 347 348 static inline bool setHeapExpand( size_t value ) { 349 if ( heapExpand < pageSize ) return true; 350 heapExpand = value; 351 return false; 352 } // setHeapExpand 360 353 361 354 … … 376 369 377 370 static inline bool setMmapStart( size_t value ) { // true => mmapped, false => sbrk 378 if ( value < __page_size || bucketSizes[NoBucketSizes - 1] < value ) return false;371 if ( value < pageSize || bucketSizes[NoBucketSizes - 1] < value ) return true; 379 372 mmapStart = value; // set global 380 373 … … 383 376 assert( maxBucketsUsed < NoBucketSizes ); // subscript failure ? 384 377 assert( mmapStart <= bucketSizes[maxBucketsUsed] ); // search failure ? 385 return true;378 return false; 386 379 } // setMmapStart 387 380 388 381 389 // <-------+----------------------------------------------------> bsize (bucket size) 390 // |header |addr 391 //================================================================================== 392 // align/offset | 393 // <-----------------<------------+-----------------------------> bsize (bucket size) 394 // |fake-header | addr 395 #define headerAddr( addr ) ((HeapManager.Storage.Header *)( (char *)addr - sizeof(HeapManager.Storage) )) 396 #define realHeader( header ) ((HeapManager.Storage.Header *)((char *)header - header->kind.fake.offset)) 397 398 // <-------<<--------------------- dsize ---------------------->> bsize (bucket size) 399 // |header |addr 400 //================================================================================== 401 // align/offset | 402 // <------------------------------<<---------- dsize --------->>> bsize (bucket size) 403 // |fake-header |addr 404 #define dataStorage( bsize, addr, header ) (bsize - ( (char *)addr - (char *)header )) 405 406 407 static inline void checkAlign( size_t alignment ) { 408 if ( alignment < libAlign() || ! is_pow2( alignment ) ) { 409 abort( "Alignment %zu for memory allocation is less than %d and/or not a power of 2.", alignment, libAlign() ); 410 } // if 411 } // checkAlign 412 413 414 static inline void checkHeader( bool check, const char name[], void * addr ) { 382 static inline void checkHeader( bool check, const char * name, void * addr ) { 415 383 if ( unlikely( check ) ) { // bad address ? 416 384 abort( "Attempt to %s storage %p with address outside the heap.\n" … … 423 391 static inline void fakeHeader( HeapManager.Storage.Header *& header, size_t & alignment ) { 424 392 if ( unlikely( (header->kind.fake.alignment & 1) == 1 ) ) { // fake header ? 393 size_t offset = header->kind.fake.offset; 425 394 alignment = header->kind.fake.alignment & -2; // remove flag from value 426 395 #ifdef __CFA_DEBUG__ 427 396 checkAlign( alignment ); // check alignment 428 397 #endif // __CFA_DEBUG__ 429 header = realHeader( header ); // backup from fake to real header 430 } else { 431 alignment = libAlign(); // => no fake header 398 header = (HeapManager.Storage.Header *)((char *)header - offset); 432 399 } // if 433 400 } // fakeHeader 434 401 435 402 436 static inline bool headers( const char name[] __attribute__(( unused )), void * addr, HeapManager.Storage.Header *& header, HeapManager.FreeHeader *& freeElem, 437 size_t & size, size_t & alignment ) with( heapManager ) { 403 // <-------+----------------------------------------------------> bsize (bucket size) 404 // |header |addr 405 //================================================================================== 406 // | alignment 407 // <-----------------<------------+-----------------------------> bsize (bucket size) 408 // |fake-header | addr 409 #define headerAddr( addr ) ((HeapManager.Storage.Header *)( (char *)addr - sizeof(HeapManager.Storage) )) 410 411 // <-------<<--------------------- dsize ---------------------->> bsize (bucket size) 412 // |header |addr 413 //================================================================================== 414 // | alignment 415 // <------------------------------<<---------- dsize --------->>> bsize (bucket size) 416 // |fake-header |addr 417 #define dataStorage( bsize, addr, header ) (bsize - ( (char *)addr - (char *)header )) 418 419 420 static inline bool headers( const char * name __attribute__(( unused )), void * addr, HeapManager.Storage.Header *& header, HeapManager.FreeHeader *& freeElem, size_t & size, size_t & alignment ) with ( heapManager ) { 438 421 header = headerAddr( addr ); 439 422 440 if ( unlikely( addr < heapBegin || heapEnd < addr ) ) {// mmapped ?423 if ( unlikely( heapEnd < addr ) ) { // mmapped ? 441 424 fakeHeader( header, alignment ); 442 425 size = header->kind.real.blockSize & -3; // mmap size … … 445 428 446 429 #ifdef __CFA_DEBUG__ 447 checkHeader( header < (HeapManager.Storage.Header *)heapBegin, name, addr ); // bad low address ?430 checkHeader( addr < heapBegin || header < (HeapManager.Storage.Header *)heapBegin, name, addr ); // bad low address ? 448 431 #endif // __CFA_DEBUG__ 449 432 … … 466 449 } // headers 467 450 468 #ifdef __CFA_DEBUG__ 469 #if __SIZEOF_POINTER__ == 4 470 #define MASK 0xdeadbeef 471 #else 472 #define MASK 0xdeadbeefdeadbeef 473 #endif 474 #define STRIDE size_t 475 476 static void * Memset( void * addr, STRIDE size ) { // debug only 477 if ( size % sizeof(STRIDE) != 0 ) abort( "Memset() : internal error, size %zd not multiple of %zd.", size, sizeof(STRIDE) ); 478 if ( (STRIDE)addr % sizeof(STRIDE) != 0 ) abort( "Memset() : internal error, addr %p not multiple of %zd.", addr, sizeof(STRIDE) ); 479 480 STRIDE * end = (STRIDE *)addr + size / sizeof(STRIDE); 481 for ( STRIDE * p = (STRIDE *)addr; p < end; p += 1 ) *p = MASK; 482 return addr; 483 } // Memset 484 #endif // __CFA_DEBUG__ 485 486 487 #define NO_MEMORY_MSG "insufficient heap memory available for allocating %zd new bytes." 488 489 static inline void * extend( size_t size ) with( heapManager ) { 451 452 static inline void * extend( size_t size ) with ( heapManager ) { 490 453 lock( extlock __cfaabi_dbg_ctx2 ); 491 454 ptrdiff_t rem = heapRemaining - size; … … 493 456 // If the size requested is bigger than the current remaining storage, increase the size of the heap. 494 457 495 size_t increase = ceiling2( size > heapExpand ? size : heapExpand, __page_size ); 496 // Do not call abort or strerror( errno ) as they may call malloc. 497 if ( sbrk( increase ) == (void *)-1 ) { // failed, no memory ? 458 size_t increase = libCeiling( size > heapExpand ? size : heapExpand, libAlign() ); 459 if ( sbrk( increase ) == (void *)-1 ) { 498 460 unlock( extlock ); 499 __cfaabi_bits_print_nolock( STDERR_FILENO, NO_MEMORY_MSG, size ); 500 _exit( EXIT_FAILURE ); 501 } // if 502 if ( mprotect( (char *)heapEnd + heapRemaining, increase, __map_prot ) ) { 503 unlock( extlock ); 504 __cfaabi_bits_print_nolock( STDERR_FILENO, "extend() : internal error, mprotect failure, heapEnd:%p size:%zd, errno:%d.\n", heapEnd, increase, errno ); 505 _exit( EXIT_FAILURE ); 461 errno = ENOMEM; 462 return 0p; 506 463 } // if 507 464 #ifdef __STATISTICS__ … … 511 468 #ifdef __CFA_DEBUG__ 512 469 // Set new memory to garbage so subsequent uninitialized usages might fail. 513 memset( (char *)heapEnd + heapRemaining, '\xde', increase ); 514 //Memset( (char *)heapEnd + heapRemaining, increase ); 470 memset( (char *)heapEnd + heapRemaining, '\377', increase ); 515 471 #endif // __CFA_DEBUG__ 516 472 rem = heapRemaining + increase - size; … … 525 481 526 482 527 static inline void * doMalloc( size_t size ) with ( heapManager ) {483 static inline void * doMalloc( size_t size ) with ( heapManager ) { 528 484 HeapManager.Storage * block; // pointer to new block of storage 529 485 … … 531 487 // along with the block and is a multiple of the alignment size. 532 488 533 if ( unlikely( size > ULONG_MAX- sizeof(HeapManager.Storage) ) ) return 0p;489 if ( unlikely( size > ~0ul - sizeof(HeapManager.Storage) ) ) return 0p; 534 490 size_t tsize = size + sizeof(HeapManager.Storage); 535 491 if ( likely( tsize < mmapStart ) ) { // small size => sbrk … … 541 497 posn = Bsearchl( (unsigned int)tsize, bucketSizes, (size_t)maxBucketsUsed ); 542 498 HeapManager.FreeHeader * freeElem = &freeLists[posn]; 543 verify( freeElem <= &freeLists[maxBucketsUsed] ); // subscripting error ? 544 verify( tsize <= freeElem->blockSize ); // search failure ? 499 // #ifdef FASTLOOKUP 500 // if ( tsize < LookupSizes ) 501 // freeElem = &freeLists[lookup[tsize]]; 502 // else 503 // #endif // FASTLOOKUP 504 // freeElem = bsearchl( tsize, freeLists, (size_t)maxBucketsUsed ); // binary search 505 // HeapManager.FreeHeader * freeElem = 506 // #ifdef FASTLOOKUP 507 // tsize < LookupSizes ? &freeLists[lookup[tsize]] : 508 // #endif // FASTLOOKUP 509 // bsearchl( tsize, freeLists, (size_t)maxBucketsUsed ); // binary search 510 assert( freeElem <= &freeLists[maxBucketsUsed] ); // subscripting error ? 511 assert( tsize <= freeElem->blockSize ); // search failure ? 545 512 tsize = freeElem->blockSize; // total space needed for request 546 513 547 514 // Spin until the lock is acquired for this particular size of block. 548 515 549 #if BUCKETLOCK == SPINLOCK516 #if defined( SPINLOCK ) 550 517 lock( freeElem->lock __cfaabi_dbg_ctx2 ); 551 518 block = freeElem->freeList; // remove node from stack 552 519 #else 553 block = pop( freeElem->freeList);554 #endif // BUCKETLOCK520 block = freeElem->freeList.pop(); 521 #endif // SPINLOCK 555 522 if ( unlikely( block == 0p ) ) { // no free block ? 556 #if BUCKETLOCK == SPINLOCK523 #if defined( SPINLOCK ) 557 524 unlock( freeElem->lock ); 558 #endif // BUCKETLOCK525 #endif // SPINLOCK 559 526 560 527 // Freelist for that size was empty, so carve it out of the heap if there's enough left, or get some more … … 562 529 563 530 block = (HeapManager.Storage *)extend( tsize ); // mutual exclusion on call 564 #if BUCKETLOCK == SPINLOCK 531 if ( unlikely( block == 0p ) ) return 0p; 532 #if defined( SPINLOCK ) 565 533 } else { 566 534 freeElem->freeList = block->header.kind.real.next; 567 535 unlock( freeElem->lock ); 568 #endif // BUCKETLOCK536 #endif // SPINLOCK 569 537 } // if 570 538 571 539 block->header.kind.real.home = freeElem; // pointer back to free list of apropriate size 572 540 } else { // large size => mmap 573 if ( unlikely( size > ULONG_MAX - __page_size ) ) return 0p;574 tsize = ceiling2( tsize, __page_size ); // must be multiple of page size541 if ( unlikely( size > ~0ul - pageSize ) ) return 0p; 542 tsize = libCeiling( tsize, pageSize ); // must be multiple of page size 575 543 #ifdef __STATISTICS__ 576 544 __atomic_add_fetch( &mmap_calls, 1, __ATOMIC_SEQ_CST ); 577 545 __atomic_add_fetch( &mmap_storage, tsize, __ATOMIC_SEQ_CST ); 578 546 #endif // __STATISTICS__ 579 580 block = (HeapManager.Storage *)mmap( 0, tsize, __map_prot, MAP_PRIVATE | MAP_ANONYMOUS, mmapFd, 0 ); 581 if ( block == (HeapManager.Storage *)MAP_FAILED ) { // failed ? 582 if ( errno == ENOMEM ) abort( NO_MEMORY_MSG, tsize ); // no memory 547 block = (HeapManager.Storage *)mmap( 0, tsize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, mmapFd, 0 ); 548 if ( block == (HeapManager.Storage *)MAP_FAILED ) { 583 549 // Do not call strerror( errno ) as it may call malloc. 584 abort( "(HeapManager &)0x%p.doMalloc() : internal error, mmap failure, size:%zu err no:%d.", &heapManager, tsize, errno );585 } // if550 abort( "(HeapManager &)0x%p.doMalloc() : internal error, mmap failure, size:%zu error:%d.", &heapManager, tsize, errno ); 551 } // if 586 552 #ifdef __CFA_DEBUG__ 587 553 // Set new memory to garbage so subsequent uninitialized usages might fail. 588 memset( block, '\xde', tsize ); 589 //Memset( block, tsize ); 554 memset( block, '\377', tsize ); 590 555 #endif // __CFA_DEBUG__ 591 556 block->header.kind.real.blockSize = tsize; // storage size for munmap 592 557 } // if 593 558 594 block->header.kind.real.size = size; // store allocation size595 559 void * addr = &(block->data); // adjust off header to user bytes 596 verify( ((uintptr_t)addr & (libAlign() - 1)) == 0 ); // minimum alignment ?597 560 598 561 #ifdef __CFA_DEBUG__ 599 __atomic_add_fetch( &allocUnfreed, tsize, __ATOMIC_SEQ_CST ); 562 assert( ((uintptr_t)addr & (libAlign() - 1)) == 0 ); // minimum alignment ? 563 __atomic_add_fetch( &allocFree, tsize, __ATOMIC_SEQ_CST ); 600 564 if ( traceHeap() ) { 601 565 enum { BufferSize = 64 }; 602 566 char helpText[BufferSize]; 603 567 int len = snprintf( helpText, BufferSize, "%p = Malloc( %zu ) (allocated %zu)\n", addr, size, tsize ); 568 // int len = snprintf( helpText, BufferSize, "Malloc %p %zu\n", addr, size ); 604 569 __cfaabi_bits_write( STDERR_FILENO, helpText, len ); // print debug/nodebug 605 570 } // if … … 610 575 611 576 612 static inline void doFree( void * addr ) with ( heapManager ) {577 static inline void doFree( void * addr ) with ( heapManager ) { 613 578 #ifdef __CFA_DEBUG__ 614 579 if ( unlikely( heapManager.heapBegin == 0p ) ) { … … 627 592 #endif // __STATISTICS__ 628 593 if ( munmap( header, size ) == -1 ) { 594 #ifdef __CFA_DEBUG__ 629 595 abort( "Attempt to deallocate storage %p not allocated or with corrupt header.\n" 630 596 "Possible cause is invalid pointer.", 631 597 addr ); 598 #endif // __CFA_DEBUG__ 632 599 } // if 633 600 } else { 634 601 #ifdef __CFA_DEBUG__ 635 602 // Set free memory to garbage so subsequent usages might fail. 636 memset( ((HeapManager.Storage *)header)->data, '\xde', freeElem->blockSize - sizeof( HeapManager.Storage ) ); 637 //Memset( ((HeapManager.Storage *)header)->data, freeElem->blockSize - sizeof( HeapManager.Storage ) ); 603 memset( ((HeapManager.Storage *)header)->data, '\377', freeElem->blockSize - sizeof( HeapManager.Storage ) ); 638 604 #endif // __CFA_DEBUG__ 639 605 … … 641 607 free_storage += size; 642 608 #endif // __STATISTICS__ 643 #if BUCKETLOCK == SPINLOCK609 #if defined( SPINLOCK ) 644 610 lock( freeElem->lock __cfaabi_dbg_ctx2 ); // acquire spin lock 645 611 header->kind.real.next = freeElem->freeList; // push on stack … … 647 613 unlock( freeElem->lock ); // release spin lock 648 614 #else 649 push( freeElem->freeList,*(HeapManager.Storage *)header );650 #endif // BUCKETLOCK615 freeElem->freeList.push( *(HeapManager.Storage *)header ); 616 #endif // SPINLOCK 651 617 } // if 652 618 653 619 #ifdef __CFA_DEBUG__ 654 __atomic_add_fetch( &alloc Unfreed, -size, __ATOMIC_SEQ_CST );620 __atomic_add_fetch( &allocFree, -size, __ATOMIC_SEQ_CST ); 655 621 if ( traceHeap() ) { 656 char helpText[64]; 622 enum { BufferSize = 64 }; 623 char helpText[BufferSize]; 657 624 int len = snprintf( helpText, sizeof(helpText), "Free( %p ) size:%zu\n", addr, size ); 658 625 __cfaabi_bits_write( STDERR_FILENO, helpText, len ); // print debug/nodebug … … 662 629 663 630 664 size_t prtFree( HeapManager & manager ) with ( manager ) {631 size_t prtFree( HeapManager & manager ) with ( manager ) { 665 632 size_t total = 0; 666 633 #ifdef __STATISTICS__ … … 674 641 #endif // __STATISTICS__ 675 642 676 #if BUCKETLOCK == SPINLOCK643 #if defined( SPINLOCK ) 677 644 for ( HeapManager.Storage * p = freeLists[i].freeList; p != 0p; p = p->header.kind.real.next ) { 678 645 #else 679 for(;;) { 680 // for ( HeapManager.Storage * p = top( freeLists[i].freeList ); p != 0p; p = (p)`next->top ) { 681 // for ( HeapManager.Storage * p = top( freeLists[i].freeList ); p != 0p; /* p = getNext( p )->top */) { 682 // HeapManager.Storage * temp = p->header.kind.real.next.top; // FIX ME: direct assignent fails, initialization works` 683 // typeof(p) temp = (( p )`next)->top; // FIX ME: direct assignent fails, initialization works` 684 // p = temp; 685 #endif // BUCKETLOCK 646 for ( HeapManager.Storage * p = freeLists[i].freeList.top(); p != 0p; p = p->header.kind.real.next.top ) { 647 #endif // SPINLOCK 686 648 total += size; 687 649 #ifdef __STATISTICS__ … … 703 665 704 666 705 static void ?{}( HeapManager & manager ) with( manager ) { 706 __page_size = sysconf( _SC_PAGESIZE ); 707 __map_prot = PROT_READ | PROT_WRITE | PROT_EXEC; 667 static void ?{}( HeapManager & manager ) with ( manager ) { 668 pageSize = sysconf( _SC_PAGESIZE ); 708 669 709 670 for ( unsigned int i = 0; i < NoBucketSizes; i += 1 ) { // initialize the free lists … … 719 680 #endif // FASTLOOKUP 720 681 721 if ( !setMmapStart( default_mmap_start() ) ) {682 if ( setMmapStart( default_mmap_start() ) ) { 722 683 abort( "HeapManager : internal error, mmap start initialization failure." ); 723 684 } // if … … 725 686 726 687 char * end = (char *)sbrk( 0 ); 727 heapBegin = heapEnd = sbrk( (char *)ceiling2( (long unsigned int)end, __page_size ) - end ); // move start of heap to multiple of alignment 688 sbrk( (char *)libCeiling( (long unsigned int)end, libAlign() ) - end ); // move start of heap to multiple of alignment 689 heapBegin = heapEnd = sbrk( 0 ); // get new start point 728 690 } // HeapManager 729 691 … … 733 695 if ( traceHeapTerm() ) { 734 696 printStats(); 735 // prtUnfreed() called in heapAppStop()697 // if ( prtfree() ) prtFree( heapManager, true ); 736 698 } // if 737 699 #endif // __STATISTICS__ … … 742 704 void memory_startup( void ) { 743 705 #ifdef __CFA_DEBUG__ 744 if ( heapBoot ) { // check for recursion during system boot 706 if ( unlikely( heapBoot ) ) { // check for recursion during system boot 707 // DO NOT USE STREAMS AS THEY MAY BE UNAVAILABLE AT THIS POINT. 745 708 abort( "boot() : internal error, recursively invoked during system boot." ); 746 709 } // if … … 748 711 #endif // __CFA_DEBUG__ 749 712 750 // verify( heapManager.heapBegin != 0 );713 //assert( heapManager.heapBegin != 0 ); 751 714 //heapManager{}; 752 if ( heapManager.heapBegin == 0p ) heapManager{}; // sanity check715 if ( heapManager.heapBegin == 0p ) heapManager{}; 753 716 } // memory_startup 754 717 … … 760 723 761 724 static inline void * mallocNoStats( size_t size ) { // necessary for malloc statistics 762 verify( heapManager.heapBegin != 0p ); // called before memory_startup ? 763 if ( unlikely( size ) == 0 ) return 0p; // 0 BYTE ALLOCATION RETURNS NULL POINTER 764 765 #if __SIZEOF_POINTER__ == 8 766 verify( size < ((typeof(size_t))1 << 48) ); 767 #endif // __SIZEOF_POINTER__ == 8 768 return doMalloc( size ); 725 //assert( heapManager.heapBegin != 0 ); 726 if ( unlikely( heapManager.heapBegin == 0p ) ) heapManager{}; // called before memory_startup ? 727 void * addr = doMalloc( size ); 728 if ( unlikely( addr == 0p ) ) errno = ENOMEM; // POSIX 729 return addr; 769 730 } // mallocNoStats 770 731 771 732 772 static inline void * callocNoStats( size_t dim, size_t elemSize ) { 773 size_t size = dim * elemSize; 774 if ( unlikely( size ) == 0 ) return 0p; // 0 BYTE ALLOCATION RETURNS NULL POINTER 733 static inline void * callocNoStats( size_t noOfElems, size_t elemSize ) { 734 size_t size = noOfElems * elemSize; 775 735 char * addr = (char *)mallocNoStats( size ); 736 if ( unlikely( addr == 0p ) ) return 0p; 776 737 777 738 HeapManager.Storage.Header * header; 778 739 HeapManager.FreeHeader * freeElem; 779 740 size_t bsize, alignment; 741 bool mapped __attribute__(( unused )) = headers( "calloc", addr, header, freeElem, bsize, alignment ); 780 742 #ifndef __CFA_DEBUG__ 781 bool mapped =782 #endif // __CFA_DEBUG__783 headers( "calloc", addr, header, freeElem, bsize, alignment );784 #ifndef __CFA_DEBUG__785 786 743 // Mapped storage is zero filled, but in debug mode mapped memory is scrubbed in doMalloc, so it has to be reset to zero. 787 744 if ( ! mapped ) 788 745 #endif // __CFA_DEBUG__ 789 // <-------0000000000000000000000000000UUUUUUUUUUUUUUUUUUUUUUUUU> bsize (bucket size) U => undefined 746 // Zero entire data space even when > than size => realloc without a new allocation and zero fill works. 747 // <-------00000000000000000000000000000000000000000000000000000> bsize (bucket size) 790 748 // `-header`-addr `-size 791 memset( addr, '\0', size );// set to zeros749 memset( addr, '\0', bsize - sizeof(HeapManager.Storage) ); // set to zeros 792 750 793 751 header->kind.real.blockSize |= 2; // mark as zero filled … … 796 754 797 755 798 static inline void * memalignNoStats( size_t alignment, size_t size ) { 799 if ( unlikely( size ) == 0 ) return 0p; // 0 BYTE ALLOCATION RETURNS NULL POINTER 800 756 static inline void * memalignNoStats( size_t alignment, size_t size ) { // necessary for malloc statistics 801 757 #ifdef __CFA_DEBUG__ 802 758 checkAlign( alignment ); // check alignment … … 816 772 // add sizeof(Storage) for fake header 817 773 char * addr = (char *)mallocNoStats( size + alignment - libAlign() + sizeof(HeapManager.Storage) ); 774 if ( unlikely( addr == 0p ) ) return addr; 818 775 819 776 // address in the block of the "next" alignment address 820 char * user = (char *) ceiling2( (uintptr_t)(addr + sizeof(HeapManager.Storage)), alignment );777 char * user = (char *)libCeiling( (uintptr_t)(addr + sizeof(HeapManager.Storage)), alignment ); 821 778 822 779 // address of header from malloc 823 780 HeapManager.Storage.Header * realHeader = headerAddr( addr ); 824 realHeader->kind.real.size = size; // correct size to eliminate above alignment offset825 781 // address of fake header * before* the alignment location 826 782 HeapManager.Storage.Header * fakeHeader = headerAddr( user ); … … 834 790 835 791 836 static inline void * cmemalignNoStats( size_t alignment, size_t dim, size_t elemSize ) { 837 size_t size = dim * elemSize; 838 if ( unlikely( size ) == 0 ) return 0p; // 0 BYTE ALLOCATION RETURNS NULL POINTER 792 static inline void * cmemalignNoStats( size_t alignment, size_t noOfElems, size_t elemSize ) { 793 size_t size = noOfElems * elemSize; 839 794 char * addr = (char *)memalignNoStats( alignment, size ); 840 795 if ( unlikely( addr == 0p ) ) return 0p; 841 796 HeapManager.Storage.Header * header; 842 797 HeapManager.FreeHeader * freeElem; 843 798 size_t bsize; 799 bool mapped __attribute__(( unused )) = headers( "cmemalign", addr, header, freeElem, bsize, alignment ); 844 800 #ifndef __CFA_DEBUG__ 845 bool mapped =846 #endif // __CFA_DEBUG__847 headers( "cmemalign", addr, header, freeElem, bsize, alignment );848 849 801 // Mapped storage is zero filled, but in debug mode mapped memory is scrubbed in doMalloc, so it has to be reset to zero. 850 #ifndef __CFA_DEBUG__851 802 if ( ! mapped ) 852 803 #endif // __CFA_DEBUG__ 853 // <-------0000000000000000000000000000UUUUUUUUUUUUUUUUUUUUUUUUU> bsize (bucket size) U => undefined 854 // `-header`-addr `-size 855 memset( addr, '\0', size ); // set to zeros 856 857 header->kind.real.blockSize |= 2; // mark as zero filled 804 memset( addr, '\0', dataStorage( bsize, addr, header ) ); // set to zeros 805 header->kind.real.blockSize |= 2; // mark as zero filled 806 858 807 return addr; 859 808 } // cmemalignNoStats 860 809 861 810 811 // supported mallopt options 812 #ifndef M_MMAP_THRESHOLD 813 #define M_MMAP_THRESHOLD (-1) 814 #endif // M_TOP_PAD 815 #ifndef M_TOP_PAD 816 #define M_TOP_PAD (-2) 817 #endif // M_TOP_PAD 818 819 862 820 extern "C" { 863 // Allocates size bytes and returns a pointer to the allocated memory. The contents are undefined. If size is 0, 864 // then malloc() returns a unique pointer value that can later be successfully passed to free(). 821 // The malloc() function allocates size bytes and returns a pointer to the allocated memory. The memory is not 822 // initialized. If size is 0, then malloc() returns either 0p, or a unique pointer value that can later be 823 // successfully passed to free(). 865 824 void * malloc( size_t size ) { 866 825 #ifdef __STATISTICS__ … … 872 831 } // malloc 873 832 874 875 // Same as malloc() except size bytes is an array of dim elements each of elemSize bytes. 876 void * aalloc( size_t dim, size_t elemSize ) { 877 size_t size = dim * elemSize; 878 #ifdef __STATISTICS__ 879 __atomic_add_fetch( &aalloc_calls, 1, __ATOMIC_SEQ_CST ); 880 __atomic_add_fetch( &aalloc_storage, size, __ATOMIC_SEQ_CST ); 881 #endif // __STATISTICS__ 882 883 return mallocNoStats( size ); 884 } // aalloc 885 886 887 // Same as aalloc() with memory set to zero. 888 void * calloc( size_t dim, size_t elemSize ) { 833 // The calloc() function allocates memory for an array of nmemb elements of size bytes each and returns a pointer to 834 // the allocated memory. The memory is set to zero. If nmemb or size is 0, then calloc() returns either 0p, or a 835 // unique pointer value that can later be successfully passed to free(). 836 void * calloc( size_t noOfElems, size_t elemSize ) { 889 837 #ifdef __STATISTICS__ 890 838 __atomic_add_fetch( &calloc_calls, 1, __ATOMIC_SEQ_CST ); 891 __atomic_add_fetch( &calloc_storage, dim* elemSize, __ATOMIC_SEQ_CST );892 #endif // __STATISTICS__ 893 894 return callocNoStats( dim, elemSize );839 __atomic_add_fetch( &calloc_storage, noOfElems * elemSize, __ATOMIC_SEQ_CST ); 840 #endif // __STATISTICS__ 841 842 return callocNoStats( noOfElems, elemSize ); 895 843 } // calloc 896 844 897 898 // Change the size of the memory block pointed to by oaddr to size bytes. The contents are undefined. If oaddr is 899 // 0p, then the call is equivalent to malloc(size), for all values of size; if size is equal to zero, and oaddr is 900 // not 0p, then the call is equivalent to free(oaddr). Unless oaddr is 0p, it must have been returned by an earlier 901 // call to malloc(), alloc(), calloc() or realloc(). If the area pointed to was moved, a free(oaddr) is done. 902 void * resize( void * oaddr, size_t size ) { 903 #ifdef __STATISTICS__ 904 __atomic_add_fetch( &resize_calls, 1, __ATOMIC_SEQ_CST ); 845 // The realloc() function changes the size of the memory block pointed to by ptr to size bytes. The contents will be 846 // unchanged in the range from the start of the region up to the minimum of the old and new sizes. If the new size 847 // is larger than the old size, the added memory will not be initialized. If ptr is 0p, then the call is 848 // equivalent to malloc(size), for all values of size; if size is equal to zero, and ptr is not 0p, then the call 849 // is equivalent to free(ptr). Unless ptr is 0p, it must have been returned by an earlier call to malloc(), 850 // calloc() or realloc(). If the area pointed to was moved, a free(ptr) is done. 851 void * realloc( void * oaddr, size_t size ) { 852 #ifdef __STATISTICS__ 853 __atomic_add_fetch( &realloc_calls, 1, __ATOMIC_SEQ_CST ); 905 854 #endif // __STATISTICS__ 906 855 907 856 // If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned. 908 if ( unlikely( size == 0 ) ) { free( oaddr ); return 0p; } // special cases 909 if ( unlikely( oaddr == 0p ) ) { 910 #ifdef __STATISTICS__ 911 __atomic_add_fetch( &resize_storage, size, __ATOMIC_SEQ_CST ); 912 #endif // __STATISTICS__ 913 return mallocNoStats( size ); 914 } // if 857 if ( unlikely( size == 0 ) ) { free( oaddr ); return mallocNoStats( size ); } // special cases 858 if ( unlikely( oaddr == 0p ) ) return mallocNoStats( size ); 915 859 916 860 HeapManager.Storage.Header * header; 917 861 HeapManager.FreeHeader * freeElem; 918 size_t bsize, oalign; 919 headers( "resize", oaddr, header, freeElem, bsize, oalign ); 862 size_t bsize, oalign = 0; 863 headers( "realloc", oaddr, header, freeElem, bsize, oalign ); 864 920 865 size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket 921 922 // same size, DO NOT preserve STICKY PROPERTIES. 923 if ( oalign == libAlign() && size <= odsize && odsize <= size * 2 ) { // allow 50% wasted storage for smaller size 924 header->kind.real.blockSize &= -2; // no alignment and turn off 0 fill 925 header->kind.real.size = size; // reset allocation size 866 if ( size <= odsize && odsize <= size * 2 ) { // allow up to 50% wasted storage in smaller size 867 // Do not know size of original allocation => cannot do 0 fill for any additional space because do not know 868 // where to start filling, i.e., do not overwrite existing values in space. 869 // 870 // This case does not result in a new profiler entry because the previous one still exists and it must match with 871 // the free for this memory. Hence, this realloc does not appear in the profiler output. 926 872 return oaddr; 927 873 } // if 928 874 929 875 #ifdef __STATISTICS__ 930 __atomic_add_fetch( &resize_storage, size, __ATOMIC_SEQ_CST ); 931 #endif // __STATISTICS__ 932 933 // change size, DO NOT preserve STICKY PROPERTIES. 934 free( oaddr ); 935 return mallocNoStats( size ); // create new area 936 } // resize 937 938 939 // Same as resize() but the contents are unchanged in the range from the start of the region up to the minimum of 940 // the old and new sizes. 941 void * realloc( void * oaddr, size_t size ) { 942 #ifdef __STATISTICS__ 943 __atomic_add_fetch( &realloc_calls, 1, __ATOMIC_SEQ_CST ); 944 #endif // __STATISTICS__ 945 946 // If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned. 947 if ( unlikely( size == 0 ) ) { free( oaddr ); return 0p; } // special cases 948 if ( unlikely( oaddr == 0p ) ) { 949 #ifdef __STATISTICS__ 950 __atomic_add_fetch( &realloc_storage, size, __ATOMIC_SEQ_CST ); 951 #endif // __STATISTICS__ 952 return mallocNoStats( size ); 953 } // if 954 955 HeapManager.Storage.Header * header; 956 HeapManager.FreeHeader * freeElem; 957 size_t bsize, oalign; 958 headers( "realloc", oaddr, header, freeElem, bsize, oalign ); 959 960 size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket 961 size_t osize = header->kind.real.size; // old allocation size 962 bool ozfill = (header->kind.real.blockSize & 2); // old allocation zero filled 963 if ( unlikely( size <= odsize ) && odsize <= size * 2 ) { // allow up to 50% wasted storage 964 header->kind.real.size = size; // reset allocation size 965 if ( unlikely( ozfill ) && size > osize ) { // previous request zero fill and larger ? 966 memset( (char *)oaddr + osize, '\0', size - osize ); // initialize added storage 967 } // if 968 return oaddr; 969 } // if 970 971 #ifdef __STATISTICS__ 972 __atomic_add_fetch( &realloc_storage, size, __ATOMIC_SEQ_CST ); 876 __atomic_add_fetch( &realloc_storage, size, __ATOMIC_SEQ_CST ); 973 877 #endif // __STATISTICS__ 974 878 … … 976 880 977 881 void * naddr; 978 if ( likely( oalign == libAlign() ) ) { // previous request not aligned ? 979 naddr = mallocNoStats( size ); // create new area 882 if ( unlikely( oalign != 0 ) ) { // previous request memalign? 883 if ( unlikely( header->kind.real.blockSize & 2 ) ) { // previous request zero fill 884 naddr = cmemalignNoStats( oalign, 1, size ); // create new aligned area 885 } else { 886 naddr = memalignNoStats( oalign, size ); // create new aligned area 887 } // if 980 888 } else { 981 naddr = memalignNoStats( oalign, size ); // create new aligned area 982 } // if 983 984 headers( "realloc", naddr, header, freeElem, bsize, oalign ); 985 memcpy( naddr, oaddr, min( osize, size ) ); // copy bytes 986 free( oaddr ); 987 988 if ( unlikely( ozfill ) ) { // previous request zero fill ? 989 header->kind.real.blockSize |= 2; // mark new request as zero filled 990 if ( size > osize ) { // previous request larger ? 991 memset( (char *)naddr + osize, '\0', size - osize ); // initialize added storage 889 if ( unlikely( header->kind.real.blockSize & 2 ) ) { // previous request zero fill 890 naddr = callocNoStats( 1, size ); // create new area 891 } else { 892 naddr = mallocNoStats( size ); // create new area 992 893 } // if 993 894 } // if 895 if ( unlikely( naddr == 0p ) ) return 0p; 896 897 headers( "realloc", naddr, header, freeElem, bsize, oalign ); 898 size_t ndsize = dataStorage( bsize, naddr, header ); // data storage avilable in bucket 899 // To preserve prior fill, the entire bucket must be copied versus the size. 900 memcpy( naddr, oaddr, MIN( odsize, ndsize ) ); // copy bytes 901 free( oaddr ); 994 902 return naddr; 995 903 } // realloc 996 904 997 998 // Same as malloc() except the memory address is a multiple of alignment, which must be a power of two. (obsolete)905 // The obsolete function memalign() allocates size bytes and returns a pointer to the allocated memory. The memory 906 // address will be a multiple of alignment, which must be a power of two. 999 907 void * memalign( size_t alignment, size_t size ) { 1000 908 #ifdef __STATISTICS__ … … 1007 915 1008 916 1009 // Same as aalloc() with memory alignment. 1010 void * amemalign( size_t alignment, size_t dim, size_t elemSize ) { 1011 size_t size = dim * elemSize; 917 // The cmemalign() function is the same as calloc() with memory alignment. 918 void * cmemalign( size_t alignment, size_t noOfElems, size_t elemSize ) { 1012 919 #ifdef __STATISTICS__ 1013 920 __atomic_add_fetch( &cmemalign_calls, 1, __ATOMIC_SEQ_CST ); 1014 __atomic_add_fetch( &cmemalign_storage, size, __ATOMIC_SEQ_CST ); 1015 #endif // __STATISTICS__ 1016 1017 return memalignNoStats( alignment, size ); 1018 } // amemalign 1019 1020 1021 // Same as calloc() with memory alignment. 1022 void * cmemalign( size_t alignment, size_t dim, size_t elemSize ) { 1023 #ifdef __STATISTICS__ 1024 __atomic_add_fetch( &cmemalign_calls, 1, __ATOMIC_SEQ_CST ); 1025 __atomic_add_fetch( &cmemalign_storage, dim * elemSize, __ATOMIC_SEQ_CST ); 1026 #endif // __STATISTICS__ 1027 1028 return cmemalignNoStats( alignment, dim, elemSize ); 921 __atomic_add_fetch( &cmemalign_storage, noOfElems * elemSize, __ATOMIC_SEQ_CST ); 922 #endif // __STATISTICS__ 923 924 return cmemalignNoStats( alignment, noOfElems, elemSize ); 1029 925 } // cmemalign 1030 926 1031 1032 // Same as memalign(), but ISO/IEC 2011 C11 Section 7.22.2 states: the value of size shall be an integral multiple 1033 // of alignment. This requirement is universally ignored. 927 // The function aligned_alloc() is the same as memalign(), except for the added restriction that size should be a 928 // multiple of alignment. 1034 929 void * aligned_alloc( size_t alignment, size_t size ) { 1035 930 return memalign( alignment, size ); … … 1037 932 1038 933 1039 // Allocates size bytes and places the address of the allocated memory in *memptr. The address of the allocated1040 // memory shall be a multiple of alignment, which must be a power of two and a multiple of sizeof(void *). If size1041 // is 0, then posix_memalign() returns either 0p, or a unique pointer value that can later be successfully passed to1042 // free(3).934 // The function posix_memalign() allocates size bytes and places the address of the allocated memory in *memptr. The 935 // address of the allocated memory will be a multiple of alignment, which must be a power of two and a multiple of 936 // sizeof(void *). If size is 0, then posix_memalign() returns either 0p, or a unique pointer value that can later 937 // be successfully passed to free(3). 1043 938 int posix_memalign( void ** memptr, size_t alignment, size_t size ) { 1044 if ( alignment < libAlign() || ! is_pow2( alignment ) ) return EINVAL; // check alignment939 if ( alignment < sizeof(void *) || ! libPow2( alignment ) ) return EINVAL; // check alignment 1045 940 * memptr = memalign( alignment, size ); 941 if ( unlikely( * memptr == 0p ) ) return ENOMEM; 1046 942 return 0; 1047 943 } // posix_memalign 1048 944 1049 1050 // Allocates size bytes and returns a pointer to the allocated memory. The memory address shall be a multiple of the 1051 // page size. It is equivalent to memalign(sysconf(_SC_PAGESIZE),size). 945 // The obsolete function valloc() allocates size bytes and returns a pointer to the allocated memory. The memory 946 // address will be a multiple of the page size. It is equivalent to memalign(sysconf(_SC_PAGESIZE),size). 1052 947 void * valloc( size_t size ) { 1053 return memalign( __page_size, size );948 return memalign( pageSize, size ); 1054 949 } // valloc 1055 950 1056 951 1057 // Same as valloc but rounds size to multiple of page size. 1058 void * pvalloc( size_t size ) { 1059 return memalign( __page_size, ceiling2( size, __page_size ) ); 1060 } // pvalloc 1061 1062 1063 // Frees the memory space pointed to by ptr, which must have been returned by a previous call to malloc(), calloc() 1064 // or realloc(). Otherwise, or if free(ptr) has already been called before, undefined behaviour occurs. If ptr is 1065 // 0p, no operation is performed. 952 // The free() function frees the memory space pointed to by ptr, which must have been returned by a previous call to 953 // malloc(), calloc() or realloc(). Otherwise, or if free(ptr) has already been called before, undefined behavior 954 // occurs. If ptr is 0p, no operation is performed. 1066 955 void free( void * addr ) { 1067 956 #ifdef __STATISTICS__ … … 1084 973 1085 974 1086 // Returns the alignment of anallocation.975 // The malloc_alignment() function returns the alignment of the allocation. 1087 976 size_t malloc_alignment( void * addr ) { 1088 977 if ( unlikely( addr == 0p ) ) return libAlign(); // minimum alignment … … 1091 980 return header->kind.fake.alignment & -2; // remove flag from value 1092 981 } else { 1093 return libAlign (); // minimum alignment982 return libAlign (); // minimum alignment 1094 983 } // if 1095 984 } // malloc_alignment 1096 985 1097 986 1098 // Set the alignment for an the allocation and return previous alignment or 0 if no alignment. 1099 size_t $malloc_alignment_set( void * addr, size_t alignment ) { 1100 if ( unlikely( addr == 0p ) ) return libAlign(); // minimum alignment 1101 size_t ret; 1102 HeapManager.Storage.Header * header = headerAddr( addr ); 1103 if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ? 1104 ret = header->kind.fake.alignment & -2; // remove flag from old value 1105 header->kind.fake.alignment = alignment | 1; // add flag to new value 1106 } else { 1107 ret = 0; // => no alignment to change 1108 } // if 1109 return ret; 1110 } // $malloc_alignment_set 1111 1112 1113 // Returns true if the allocation is zero filled, e.g., allocated by calloc(). 987 // The malloc_zero_fill() function returns true if the allocation is zero filled, i.e., initially allocated by calloc(). 1114 988 bool malloc_zero_fill( void * addr ) { 1115 989 if ( unlikely( addr == 0p ) ) return false; // null allocation is not zero fill 1116 990 HeapManager.Storage.Header * header = headerAddr( addr ); 1117 991 if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ? 1118 header = realHeader( header ); // backup from fake to real header992 header = (HeapManager.Storage.Header *)((char *)header - header->kind.fake.offset); 1119 993 } // if 1120 return (header->kind.real.blockSize & 2) != 0; // zero filled ?994 return (header->kind.real.blockSize & 2) != 0; // zero filled (calloc/cmemalign) ? 1121 995 } // malloc_zero_fill 1122 996 1123 // Set allocation is zero filled and return previous zero filled. 1124 bool $malloc_zero_fill_set( void * addr ) { 1125 if ( unlikely( addr == 0p ) ) return false; // null allocation is not zero fill 1126 HeapManager.Storage.Header * header = headerAddr( addr ); 1127 if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ? 1128 header = realHeader( header ); // backup from fake to real header 1129 } // if 1130 bool ret = (header->kind.real.blockSize & 2) != 0; // zero filled ? 1131 header->kind.real.blockSize |= 2; // mark as zero filled 1132 return ret; 1133 } // $malloc_zero_fill_set 1134 1135 1136 // Returns original total allocation size (not bucket size) => array size is dimension * sizeif(T). 1137 size_t malloc_size( void * addr ) { 1138 if ( unlikely( addr == 0p ) ) return 0; // null allocation has zero size 1139 HeapManager.Storage.Header * header = headerAddr( addr ); 1140 if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ? 1141 header = realHeader( header ); // backup from fake to real header 1142 } // if 1143 return header->kind.real.size; 1144 } // malloc_size 1145 1146 // Set allocation size and return previous size. 1147 size_t $malloc_size_set( void * addr, size_t size ) { 1148 if ( unlikely( addr == 0p ) ) return 0; // null allocation has 0 size 1149 HeapManager.Storage.Header * header = headerAddr( addr ); 1150 if ( (header->kind.fake.alignment & 1) == 1 ) { // fake header ? 1151 header = realHeader( header ); // backup from fake to real header 1152 } // if 1153 size_t ret = header->kind.real.size; 1154 header->kind.real.size = size; 1155 return ret; 1156 } // $malloc_size_set 1157 1158 1159 // Returns the number of usable bytes in the block pointed to by ptr, a pointer to a block of memory allocated by 1160 // malloc or a related function. 997 998 // The malloc_usable_size() function returns the number of usable bytes in the block pointed to by ptr, a pointer to 999 // a block of memory allocated by malloc(3) or a related function. 1161 1000 size_t malloc_usable_size( void * addr ) { 1162 1001 if ( unlikely( addr == 0p ) ) return 0; // null allocation has 0 size … … 1166 1005 1167 1006 headers( "malloc_usable_size", addr, header, freeElem, bsize, alignment ); 1168 return dataStorage( bsize, addr, header ); // data storage in bucket1007 return dataStorage( bsize, addr, header ); // data storage in bucket 1169 1008 } // malloc_usable_size 1170 1009 1171 1010 1172 // Prints (on default standard error) statistics about memory allocated by malloc and related functions. 1011 // The malloc_stats() function prints (on default standard error) statistics about memory allocated by malloc(3) and 1012 // related functions. 1173 1013 void malloc_stats( void ) { 1174 1014 #ifdef __STATISTICS__ … … 1178 1018 } // malloc_stats 1179 1019 1180 1181 // Changes the file descripter where malloc_stats() writes statistics. 1020 // The malloc_stats_fd() function changes the file descripter where malloc_stats() writes the statistics. 1182 1021 int malloc_stats_fd( int fd __attribute__(( unused )) ) { 1183 1022 #ifdef __STATISTICS__ 1184 int temp = stat _fd;1185 stat _fd = fd;1023 int temp = statfd; 1024 statfd = fd; 1186 1025 return temp; 1187 1026 #else … … 1191 1030 1192 1031 1193 // Adjusts parameters that control the behaviour of the memory-allocation functions (see malloc). The param argument 1194 // specifies the parameter to be modified, and value specifies the new value for that parameter. 1032 // The mallopt() function adjusts parameters that control the behavior of the memory-allocation functions (see 1033 // malloc(3)). The param argument specifies the parameter to be modified, and value specifies the new value for that 1034 // parameter. 1195 1035 int mallopt( int option, int value ) { 1196 1036 choose( option ) { 1197 1037 case M_TOP_PAD: 1198 heapExpand = ceiling2( value, __page_size );return 1;1038 if ( setHeapExpand( value ) ) return 1; 1199 1039 case M_MMAP_THRESHOLD: 1200 1040 if ( setMmapStart( value ) ) return 1; 1201 break;1202 1041 } // switch 1203 1042 return 0; // error, unsupported 1204 1043 } // mallopt 1205 1044 1206 1207 // Attempt to release free memory at the top of the heap (by calling sbrk with asuitable argument).1045 // The malloc_trim() function attempts to release free memory at the top of the heap (by calling sbrk(2) with a 1046 // suitable argument). 1208 1047 int malloc_trim( size_t ) { 1209 1048 return 0; // => impossible to release memory … … 1211 1050 1212 1051 1213 // Exports an XML string that describes the current state of the memory-allocation implementation in the caller.1214 // The string is printed on the file stream stream. The exported string includes information about all arenas (see1215 // malloc).1052 // The malloc_info() function exports an XML string that describes the current state of the memory-allocation 1053 // implementation in the caller. The string is printed on the file stream stream. The exported string includes 1054 // information about all arenas (see malloc(3)). 1216 1055 int malloc_info( int options, FILE * stream ) { 1217 if ( options != 0 ) { errno = EINVAL; return -1; } 1218 #ifdef __STATISTICS__ 1056 if ( options != 0 ) { errno = EINVAL; return -1; } 1219 1057 return printStatsXML( stream ); 1220 #else1221 return 0; // unsupported1222 #endif // __STATISTICS__1223 1058 } // malloc_info 1224 1059 1225 1060 1226 // Records the current state of all malloc internal bookkeeping variables (but not the actual contents of the heap1227 // or the state of malloc_hook functions pointers). The state is recorded in a system-dependent opaque data1228 // structure dynamically allocated via malloc, and a pointer to that data structure is returned as the function1229 // result. (The caller must freethis memory.)1061 // The malloc_get_state() function records the current state of all malloc(3) internal bookkeeping variables (but 1062 // not the actual contents of the heap or the state of malloc_hook(3) functions pointers). The state is recorded in 1063 // a system-dependent opaque data structure dynamically allocated via malloc(3), and a pointer to that data 1064 // structure is returned as the function result. (It is the caller's responsibility to free(3) this memory.) 1230 1065 void * malloc_get_state( void ) { 1231 1066 return 0p; // unsupported … … 1233 1068 1234 1069 1235 // Restores the state of all malloc internal bookkeeping variables to the values recorded in the opaque data1236 // structure pointed to by state.1237 int malloc_set_state( void * ) {1070 // The malloc_set_state() function restores the state of all malloc(3) internal bookkeeping variables to the values 1071 // recorded in the opaque data structure pointed to by state. 1072 int malloc_set_state( void * ptr ) { 1238 1073 return 0; // unsupported 1239 1074 } // malloc_set_state … … 1242 1077 1243 1078 // Must have CFA linkage to overload with C linkage realloc. 1244 void * re size( void * oaddr, size_t nalign, size_t size ) {1079 void * realloc( void * oaddr, size_t nalign, size_t size ) { 1245 1080 #ifdef __STATISTICS__ 1246 __atomic_add_fetch( &re size_calls, 1, __ATOMIC_SEQ_CST );1081 __atomic_add_fetch( &realloc_calls, 1, __ATOMIC_SEQ_CST ); 1247 1082 #endif // __STATISTICS__ 1248 1083 1249 if ( unlikely( nalign < libAlign() ) ) nalign = libAlign(); // reset alignment to minimum 1084 // If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned. 1085 if ( unlikely( size == 0 ) ) { free( oaddr ); return mallocNoStats( size ); } // special cases 1086 if ( unlikely( oaddr == 0p ) ) return mallocNoStats( size ); 1087 1088 if ( unlikely( nalign == 0 ) ) nalign = libAlign(); // reset alignment to minimum 1250 1089 #ifdef __CFA_DEBUG__ 1251 1090 else … … 1253 1092 #endif // __CFA_DEBUG__ 1254 1093 1255 // If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned. 1256 if ( unlikely( size == 0 ) ) { free( oaddr ); return 0p; } // special cases 1257 if ( unlikely( oaddr == 0p ) ) { 1258 #ifdef __STATISTICS__ 1259 __atomic_add_fetch( &resize_storage, size, __ATOMIC_SEQ_CST ); 1260 #endif // __STATISTICS__ 1261 return memalignNoStats( nalign, size ); 1262 } // if 1263 1264 // Attempt to reuse existing alignment. 1265 HeapManager.Storage.Header * header = headerAddr( oaddr ); 1266 bool isFakeHeader = header->kind.fake.alignment & 1; // old fake header ? 1267 size_t oalign; 1268 if ( isFakeHeader ) { 1269 oalign = header->kind.fake.alignment & -2; // old alignment 1270 if ( (uintptr_t)oaddr % nalign == 0 // lucky match ? 1271 && ( oalign <= nalign // going down 1272 || (oalign >= nalign && oalign <= 256) ) // little alignment storage wasted ? 1273 ) { 1274 headerAddr( oaddr )->kind.fake.alignment = nalign | 1; // update alignment (could be the same) 1275 HeapManager.FreeHeader * freeElem; 1276 size_t bsize, oalign; 1277 headers( "resize", oaddr, header, freeElem, bsize, oalign ); 1278 size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket 1279 1280 if ( size <= odsize && odsize <= size * 2 ) { // allow 50% wasted data storage 1281 headerAddr( oaddr )->kind.fake.alignment = nalign | 1; // update alignment (could be the same) 1282 1283 header->kind.real.blockSize &= -2; // turn off 0 fill 1284 header->kind.real.size = size; // reset allocation size 1285 return oaddr; 1286 } // if 1287 } // if 1288 } else if ( ! isFakeHeader // old real header (aligned on libAlign) ? 1289 && nalign == libAlign() ) { // new alignment also on libAlign => no fake header needed 1290 return resize( oaddr, size ); // duplicate special case checks 1094 HeapManager.Storage.Header * header; 1095 HeapManager.FreeHeader * freeElem; 1096 size_t bsize, oalign = 0; 1097 headers( "realloc", oaddr, header, freeElem, bsize, oalign ); 1098 size_t odsize = dataStorage( bsize, oaddr, header ); // data storage available in bucket 1099 1100 if ( oalign != 0 && (uintptr_t)oaddr % nalign == 0 ) { // has alignment and just happens to work out 1101 headerAddr( oaddr )->kind.fake.alignment = nalign | 1; // update alignment (could be the same) 1102 return realloc( oaddr, size ); 1291 1103 } // if 1292 1104 1293 1105 #ifdef __STATISTICS__ 1294 __atomic_add_fetch( &resize_storage, size, __ATOMIC_SEQ_CST );1295 #endif // __STATISTICS__1296 1297 // change size, DO NOT preserve STICKY PROPERTIES.1298 free( oaddr );1299 return memalignNoStats( nalign, size ); // create new aligned area1300 } // resize1301 1302 1303 void * realloc( void * oaddr, size_t nalign, size_t size ) {1304 if ( unlikely( nalign < libAlign() ) ) nalign = libAlign(); // reset alignment to minimum1305 #ifdef __CFA_DEBUG__1306 else1307 checkAlign( nalign ); // check alignment1308 #endif // __CFA_DEBUG__1309 1310 // If size is equal to 0, either NULL or a pointer suitable to be passed to free() is returned.1311 if ( unlikely( size == 0 ) ) { free( oaddr ); return 0p; } // special cases1312 if ( unlikely( oaddr == 0p ) ) {1313 #ifdef __STATISTICS__1314 __atomic_add_fetch( &realloc_calls, 1, __ATOMIC_SEQ_CST );1315 __atomic_add_fetch( &realloc_storage, size, __ATOMIC_SEQ_CST );1316 #endif // __STATISTICS__1317 return memalignNoStats( nalign, size );1318 } // if1319 1320 // Attempt to reuse existing alignment.1321 HeapManager.Storage.Header * header = headerAddr( oaddr );1322 bool isFakeHeader = header->kind.fake.alignment & 1; // old fake header ?1323 size_t oalign;1324 if ( isFakeHeader ) {1325 oalign = header->kind.fake.alignment & -2; // old alignment1326 if ( (uintptr_t)oaddr % nalign == 0 // lucky match ?1327 && ( oalign <= nalign // going down1328 || (oalign >= nalign && oalign <= 256) ) // little alignment storage wasted ?1329 ) {1330 headerAddr( oaddr )->kind.fake.alignment = nalign | 1; // update alignment (could be the same)1331 return realloc( oaddr, size ); // duplicate alignment and special case checks1332 } // if1333 } else if ( ! isFakeHeader // old real header (aligned on libAlign) ?1334 && nalign == libAlign() ) // new alignment also on libAlign => no fake header needed1335 return realloc( oaddr, size ); // duplicate alignment and special case checks1336 1337 #ifdef __STATISTICS__1338 __atomic_add_fetch( &realloc_calls, 1, __ATOMIC_SEQ_CST );1339 1106 __atomic_add_fetch( &realloc_storage, size, __ATOMIC_SEQ_CST ); 1340 1107 #endif // __STATISTICS__ 1341 1108 1342 HeapManager.FreeHeader * freeElem;1343 size_t bsize;1344 headers( "realloc", oaddr, header, freeElem, bsize, oalign );1345 1346 1109 // change size and copy old content to new storage 1347 1110 1348 size_t osize = header->kind.real.size; // old allocation size 1349 bool ozfill = (header->kind.real.blockSize & 2); // old allocation zero filled 1350 1351 void * naddr = memalignNoStats( nalign, size ); // create new aligned area 1111 void * naddr; 1112 if ( unlikely( header->kind.real.blockSize & 2 ) ) { // previous request zero fill 1113 naddr = cmemalignNoStats( nalign, 1, size ); // create new aligned area 1114 } else { 1115 naddr = memalignNoStats( nalign, size ); // create new aligned area 1116 } // if 1352 1117 1353 1118 headers( "realloc", naddr, header, freeElem, bsize, oalign ); 1354 memcpy( naddr, oaddr, min( osize, size ) ); // copy bytes 1119 size_t ndsize = dataStorage( bsize, naddr, header ); // data storage avilable in bucket 1120 // To preserve prior fill, the entire bucket must be copied versus the size. 1121 memcpy( naddr, oaddr, MIN( odsize, ndsize ) ); // copy bytes 1355 1122 free( oaddr ); 1356 1357 if ( unlikely( ozfill ) ) { // previous request zero fill ?1358 header->kind.real.blockSize |= 2; // mark new request as zero filled1359 if ( size > osize ) { // previous request larger ?1360 memset( (char *)naddr + osize, '\0', size - osize ); // initialize added storage1361 } // if1362 } // if1363 1123 return naddr; 1364 1124 } // realloc
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