X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/8bda55c18efe5d60be1d49937e1869b4588c2b2f..08d324beef1e0fa723013987a98ed7740d2f8343:/src/xbt/mmalloc/mm_legacy.c diff --git a/src/xbt/mmalloc/mm_legacy.c b/src/xbt/mmalloc/mm_legacy.c index 00fb84b954..f7d0f71fd2 100644 --- a/src/xbt/mmalloc/mm_legacy.c +++ b/src/xbt/mmalloc/mm_legacy.c @@ -8,32 +8,33 @@ #include "mmprivate.h" #include "gras_config.h" +#include -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_mm_legacy, xbt, - "Logging specific to mm_legacy in mmalloc"); -static void *__mmalloc_current_heap = NULL; /* The heap we are currently using. */ +/* The mmalloc() package can use a single implicit malloc descriptor + for mmalloc/mrealloc/mfree operations which do not supply an explicit + descriptor. This allows mmalloc() to provide + backwards compatibility with the non-mmap'd version. */ +xbt_mheap_t __mmalloc_default_mdp = NULL; -#include "xbt_modinter.h" -void *mmalloc_get_current_heap(void) +static xbt_mheap_t __mmalloc_current_heap = NULL; /* The heap we are currently using. */ + +xbt_mheap_t mmalloc_get_current_heap(void) { return __mmalloc_current_heap; } -void mmalloc_set_current_heap(void *new_heap) +void mmalloc_set_current_heap(xbt_mheap_t new_heap) { __mmalloc_current_heap = new_heap; } -#ifdef MMALLOC_WANT_OVERIDE_LEGACY +#ifdef MMALLOC_WANT_OVERRIDE_LEGACY void *malloc(size_t n) { - void *mdp = __mmalloc_current_heap; -#ifdef HAVE_MMAP - if (!mdp) - mmalloc_preinit(); -#endif + xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit(); + LOCK(mdp); void *ret = mmalloc(mdp, n); UNLOCK(mdp); @@ -43,18 +44,13 @@ void *malloc(size_t n) void *calloc(size_t nmemb, size_t size) { - size_t total_size = nmemb * size; - void *mdp = __mmalloc_current_heap; -#ifdef HAVE_MMAP - if (!mdp) - mmalloc_preinit(); -#endif + xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit(); + LOCK(mdp); - void *ret = mmalloc(mdp, total_size); + void *ret = mmalloc(mdp, nmemb*size); UNLOCK(mdp); + memset(ret, 0, nmemb * size); - /* Fill the allocated memory with zeroes to mimic calloc behaviour */ - memset(ret, '\0', total_size); return ret; } @@ -62,21 +58,10 @@ void *calloc(size_t nmemb, size_t size) void *realloc(void *p, size_t s) { void *ret = NULL; - void *mdp = __mmalloc_current_heap; -#ifdef HAVE_MMAP - if (!mdp) - mmalloc_preinit(); -#endif + xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit(); + LOCK(mdp); - if (s) { - if (p) - ret = mrealloc(mdp, p, s); - else - ret = mmalloc(mdp, s); - } else { - if (p) - mfree(mdp, p); - } + ret = mrealloc(mdp, p, s); UNLOCK(mdp); return ret; @@ -84,332 +69,12 @@ void *realloc(void *p, size_t s) void free(void *p) { - void *mdp = __mmalloc_current_heap; -#ifdef HAVE_GTNETS - if(!mdp) return; -#endif + xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit(); + LOCK(mdp); mfree(mdp, p); UNLOCK(mdp); } #endif -/* Make sure it works with md==NULL */ - -/* Safety gap from the heap's break address. - * Try to increase this first if you experience strange errors under - * valgrind. */ -#define HEAP_OFFSET (128UL<<20) - -void *mmalloc_get_default_md(void) -{ - xbt_assert(__mmalloc_default_mdp); - return __mmalloc_default_mdp; -} - -static void mmalloc_fork_prepare(void) -{ - struct mdesc* mdp = NULL; - if ((mdp =__mmalloc_default_mdp)){ - while(mdp){ - LOCK(mdp); - if(mdp->fd >= 0){ - mdp->refcount++; - } - mdp = mdp->next_mdesc; - } - } -} - -static void mmalloc_fork_parent(void) -{ - struct mdesc* mdp = NULL; - if ((mdp =__mmalloc_default_mdp)){ - while(mdp){ - if(mdp->fd < 0) - UNLOCK(mdp); - mdp = mdp->next_mdesc; - } - } -} - -static void mmalloc_fork_child(void) -{ - struct mdesc* mdp = NULL; - if ((mdp =__mmalloc_default_mdp)){ - while(mdp){ - UNLOCK(mdp); - mdp = mdp->next_mdesc; - } - } -} - -/* Initialize the default malloc descriptor. */ -void mmalloc_preinit(void) -{ - int res; - if (!__mmalloc_default_mdp) { - unsigned long mask = ~((unsigned long)getpagesize() - 1); - void *addr = (void*)(((unsigned long)sbrk(0) + HEAP_OFFSET) & mask); - __mmalloc_default_mdp = mmalloc_attach(-1, addr); - /* Fixme? only the default mdp in protected against forks */ - res = xbt_os_thread_atfork(mmalloc_fork_prepare, - mmalloc_fork_parent, mmalloc_fork_child); - if (res != 0) - THROWF(system_error,0,"xbt_os_thread_atfork() failed: return value %d",res); - } - xbt_assert(__mmalloc_default_mdp != NULL); -} - -void mmalloc_postexit(void) -{ - /* Do not detach the default mdp or ldl won't be able to free the memory it allocated since we're in memory */ - // mmalloc_detach(__mmalloc_default_mdp); - mmalloc_pre_detach(__mmalloc_default_mdp); -} - -int mmalloc_compare_heap(void *h1, void *h2){ - - if(h1 == NULL && h2 == NULL){ - XBT_DEBUG("Malloc descriptors null"); - return 0; - } - - - /* Heapstats */ - - struct mstats ms1 = mmstats(h1); - struct mstats ms2 = mmstats(h2); - - if(ms1.bytes_total != ms2.bytes_total){ - XBT_DEBUG("Different total size of the heap"); - return 1; - } - - if(ms1.chunks_used != ms2.chunks_used){ - XBT_DEBUG("Different chunks allocated by the user"); - return 1; - } - - if(ms1.bytes_used != ms2.bytes_used){ - XBT_DEBUG("Different byte total of user-allocated chunks"); - return 1; - } - - if(ms1.bytes_free != ms2.bytes_free){ - XBT_DEBUG("Different byte total of chunks in the free list"); - return 1; - } - - if(ms1.chunks_free != ms2.chunks_free){ - XBT_DEBUG("Different chunks in the free list"); - return 1; - } - - struct mdesc *mdp1, *mdp2; - mdp1 = MD_TO_MDP(h1); - mdp2 = MD_TO_MDP(h2); - - if(mmalloc_compare_mdesc(mdp1, mdp2)) - return 1; - - - return 0; -} - -int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2){ - - struct mdesc* mdp; - - - if(mdp1->headersize != mdp2->headersize){ - XBT_DEBUG("Different size of the file header for the mapped files"); - return 1; - } - - if(mdp1->refcount != mdp2->refcount){ - XBT_DEBUG("Different number of processes that attached the heap"); - return 1; - } - - if(strcmp(mdp1->magic, mdp2->magic) != 0){ - XBT_DEBUG("Different magic number"); - return 1; - } - - if(mdp1->flags != mdp2->flags){ - XBT_DEBUG("Different flags"); - return 1; - } - - if(mdp1->heapsize != mdp2->heapsize){ - XBT_DEBUG("Different number of info entries"); - return 1; - } - - // XBT_DEBUG("Heap size : %Zu", mdp1->heapsize); - - if(mdp1->heapbase != mdp2->heapbase){ - XBT_DEBUG("Different first block of the heap"); - return 1; - } - - - if(mdp1->heapindex != mdp2->heapindex){ - XBT_DEBUG("Different index for the heap table"); - return 1; - } - - //XBT_DEBUG("Heap index : %Zu", mdp1->heapindex); - - if(mdp1->base != mdp2->base){ - XBT_DEBUG("Different base address of the memory region"); - return 1; - } - - if(mdp1->breakval != mdp2->breakval){ - XBT_DEBUG("Different current location in the memory region"); - return 1; - } - - if(mdp1->top != mdp2->top){ - XBT_DEBUG("Different end of the current location in the memory region"); - return 1; - } - - if(mdp1->heaplimit != mdp2->heaplimit){ - XBT_DEBUG("Different limit of valid info table indices"); - return 1; - } - - //XBT_DEBUG("Heap limit : %Zu", mdp1->heaplimit); - - - if(mdp1->fd != mdp2->fd){ - XBT_DEBUG("Different file descriptor for the file to which this malloc heap is mapped"); - return 1; - } - - if(mdp1->saved_errno != mdp2->saved_errno){ - XBT_DEBUG("Different errno"); - return 1; - } - - if(mdp1->version != mdp2->version){ - XBT_DEBUG("Different version of the mmalloc package"); - return 1; - } - - - size_t block_free1, block_free2 , next_block_free, first_block_free ; - size_t i, j; - void *addr_block1, *addr_block2; - - - - /* Search index of the first free block */ - - block_free1 = mdp1->heapindex; - block_free2 = mdp2->heapindex; - - while(mdp1->heapinfo[block_free1].free.prev != 0){ - block_free1 = mdp1->heapinfo[block_free1].free.prev; - } - - while(mdp2->heapinfo[block_free2].free.prev != 0){ - block_free2 = mdp1->heapinfo[block_free2].free.prev; - } - - if(block_free1 != block_free2){ - XBT_DEBUG("Different first free block"); - return 1; - } - - first_block_free = block_free1; - - if(mdp1->heapinfo[block_free1].free.size != mdp2->heapinfo[block_free2].free.size){ - XBT_DEBUG("Different size (in blocks) of the first free cluster"); - return 1; - } - - /* Check busy blocks (circular checking)*/ - - i = block_free1 + mdp1->heapinfo[block_free1].free.size; - next_block_free = mdp1->heapinfo[block_free1].free.next; - - if(next_block_free == 0) - next_block_free = mdp1->heaplimit; - - - while(i != first_block_free){ - - while(iheapinfo[i].busy.type != mdp2->heapinfo[i].busy.type){ - XBT_DEBUG("Different type of busy block"); - return 1; - }else{ - if(i == 0) - j++; - mdp = mdp1; - addr_block1 = ADDRESS(j); - mdp = mdp2; - addr_block2 = ADDRESS(j); - switch(mdp1->heapinfo[i].busy.type){ - case 0 : - if(mdp1->heapinfo[i].busy.info.size != mdp2->heapinfo[i].busy.info.size){ - XBT_DEBUG("Different size of a large cluster"); - return 1; - }else{ - XBT_DEBUG("Block : %Zu", i); - if(memcmp(addr_block1, addr_block2, (mdp1->heapinfo[i].busy.info.size * BLOCKSIZE)) != 0){ - XBT_DEBUG("Different data in block %Zu", i); - return 1; - } - } - i = i+mdp1->heapinfo[i].busy.info.size; - break; - default : - if(mdp1->heapinfo[i].busy.info.frag.nfree != mdp2->heapinfo[i].busy.info.frag.nfree){ - XBT_DEBUG("Different free fragments in a fragmented block"); - return 1; - }else{ - if(mdp1->heapinfo[i].busy.info.frag.first != mdp2->heapinfo[i].busy.info.frag.first){ - XBT_DEBUG("Different first free fragments of the block"); - return 1; - }else{ - if(memcmp(addr_block1, addr_block2, BLOCKSIZE) != 0){ - XBT_DEBUG("Different data in fragmented block %Zu", i); - return 1; - } - } - } - i++; - break; - } - } - } - - - block_free1 = mdp1->heapinfo[block_free1].free.next; - next_block_free = mdp1->heapinfo[block_free1].free.next; - if(i != first_block_free){ - if(block_free1 != 0) - i = block_free1 + mdp1->heapinfo[block_free1].free.size; - else - i = 0; - } - - } - - return 0; - - -} - - - -