-/* Initialization for access to a mmap'd malloc managed region.
- Copyright 1992, 2000 Free Software Foundation, Inc.
+/* Initialization for acces s to a mmap'd malloc managed region. */
+
+/* Copyright (c) 2012-2014. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+/* Copyright 1992, 2000 Free Software Foundation, Inc.
Contributed by Fred Fish at Cygnus Support. fnf@cygnus.com
On failure returns NULL. */
xbt_mheap_t xbt_mheap_new(int fd, void *baseaddr)
+{
+ return xbt_mheap_new_options(fd, baseaddr, 0);
+}
+
+xbt_mheap_t xbt_mheap_new_options(int fd, void *baseaddr, int options)
{
struct mdesc mtemp;
xbt_mheap_t mdp;
mdp->base = mdp->breakval = mdp->top = baseaddr;
mdp->next_mdesc = NULL;
mdp->refcount = 1;
+ mdp->options = options;
/* If we have not been passed a valid open file descriptor for the file
to map to, then we go for an anonymous map */
{
int res;
if (__mmalloc_default_mdp == NULL) {
- unsigned long mask = ~((unsigned long)getpagesize() - 1);
+ unsigned long mask = ~((unsigned long)xbt_pagesize - 1);
void *addr = (void*)(((unsigned long)sbrk(0) + HEAP_OFFSET) & mask);
- __mmalloc_default_mdp = xbt_mheap_new(-1, addr);
+ __mmalloc_default_mdp = xbt_mheap_new_options(-1, addr, XBT_MHEAP_OPTION_MEMSET);
/* Fixme? only the default mdp in protected against forks */
- res = xbt_os_thread_atfork(mmalloc_fork_prepare, //FIXME: KILLME when things settle a bit
+ // This is mandated to protect the mmalloced areas through forks. Think of tesh.
+ // Nah, removing the mutex isn't a good idea either for tesh
+ 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);
+#if defined(HAVE_GNU_LD) && defined(MMALLOC_WANT_OVERRIDE_LEGACY)
+ mm_gnuld_legacy_init();
+#endif
+
return __mmalloc_default_mdp;
}
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);
- xbt_mheap_destroy_no_free(__mmalloc_default_mdp);
+ /* Do not destroy the default mdp or ldl won't be able to free the memory it
+ * allocated since we're in memory */
+ // xbt_mheap_destroy_no_free(__mmalloc_default_mdp);
+}
+
+size_t mmalloc_get_bytes_used(xbt_mheap_t heap){
+ int i = 0, j = 0;
+ int bytes = 0;
+
+ while(i<=((struct mdesc *)heap)->heaplimit){
+ if(((struct mdesc *)heap)->heapinfo[i].type == MMALLOC_TYPE_UNFRAGMENTED){
+ if(((struct mdesc *)heap)->heapinfo[i].busy_block.busy_size > 0)
+ bytes += ((struct mdesc *)heap)->heapinfo[i].busy_block.busy_size;
+
+ } else if(((struct mdesc *)heap)->heapinfo[i].type > 0){
+ for(j=0; j < (size_t) (BLOCKSIZE >> ((struct mdesc *)heap)->heapinfo[i].type); j++){
+ if(((struct mdesc *)heap)->heapinfo[i].busy_frag.frag_size[j] > 0)
+ bytes += ((struct mdesc *)heap)->heapinfo[i].busy_frag.frag_size[j];
+ }
+ }
+ i++;
+ }
+
+ return bytes;
+}
+
+ssize_t mmalloc_get_busy_size(xbt_mheap_t heap, void *ptr){
+
+ ssize_t block = ((char*)ptr - (char*)(heap->heapbase)) / BLOCKSIZE + 1;
+ if(heap->heapinfo[block].type < 0)
+ return -1;
+ else if(heap->heapinfo[block].type == MMALLOC_TYPE_UNFRAGMENTED)
+ return heap->heapinfo[block].busy_block.busy_size;
+ else{
+ ssize_t frag = ((uintptr_t) (ADDR2UINT (ptr) % (BLOCKSIZE))) >> heap->heapinfo[block].type;
+ return heap->heapinfo[block].busy_frag.frag_size[frag];
+ }
+
+}
+
+void mmcheck(xbt_mheap_t heap) {return;
+ if (!heap->heapinfo)
+ return;
+ malloc_info* heapinfo = NULL;
+ for (size_t i=1; i < heap->heaplimit; i += mmalloc_get_increment(heapinfo)) {
+ heapinfo = heap->heapinfo + i;
+ switch (heapinfo->type) {
+ case MMALLOC_TYPE_HEAPINFO:
+ case MMALLOC_TYPE_FREE:
+ if (heapinfo->free_block.size==0) {
+ xbt_die("Block size == 0");
+ }
+ break;
+ case MMALLOC_TYPE_UNFRAGMENTED:
+ if (heapinfo->busy_block.size==0) {
+ xbt_die("Block size == 0");
+ }
+ if (heapinfo->busy_block.busy_size==0 && heapinfo->busy_block.size!=0) {
+ xbt_die("Empty busy block");
+ }
+ break;
+ default:
+ if (heapinfo->type<0) {
+ xbt_die("Unkown mmalloc block type.");
+ }
+ }
+ }
}
