X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/6d215aa449fe86894819be267aa2ae30cb5b151c..27eac930728f84bf31b65013f7d95e39b3ea0063:/src/xbt/mmalloc/mfree.c

diff --git a/src/xbt/mmalloc/mfree.c b/src/xbt/mmalloc/mfree.c
index c750d9ad3c..e8242f67c8 100644
--- a/src/xbt/mmalloc/mfree.c
+++ b/src/xbt/mmalloc/mfree.c
@@ -11,6 +11,7 @@
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
 #include "mmprivate.h"
+#include "xbt/ex.h"
 
 /* Return memory to the heap.
    Like `mfree' but don't call a mfree_hook if there is one.  */
@@ -19,13 +20,13 @@
 void mfree(struct mdesc *mdp, void *ptr)
 {
   int type;
-  size_t block;
+  size_t block, frag_nb;
   register size_t i;
   struct list *prev, *next;
   int it;
 
   if (ptr == NULL)
-	  return;
+    return;
 
   block = BLOCK(ptr);
 
@@ -39,17 +40,17 @@ void mfree(struct mdesc *mdp, void *ptr)
 
   switch (type) {
   case -1: /* Already free */
-    fprintf(stderr,"Asked to free a fragment in a block that is already free. I'm puzzled\n");
-    abort();
+    UNLOCK(mdp);
+    THROWF(system_error, 0, "Asked to free a fragment in a block that is already free. I'm puzzled\n");
     break;
-
+    
   case 0:
-     /* Get as many statistics as early as we can.  */
-      mdp -> heapstats.chunks_used--;
-      mdp -> heapstats.bytes_used -=
-	  mdp -> heapinfo[block].busy_block.size * BLOCKSIZE;
-      mdp -> heapstats.bytes_free +=
-	  mdp -> heapinfo[block].busy_block.size * BLOCKSIZE;
+    /* Get as many statistics as early as we can.  */
+    mdp -> heapstats.chunks_used--;
+    mdp -> heapstats.bytes_used -=
+      mdp -> heapinfo[block].busy_block.size * BLOCKSIZE;
+    mdp -> heapstats.bytes_free +=
+      mdp -> heapinfo[block].busy_block.size * BLOCKSIZE;
 
     /* Find the free cluster previous to this one in the free list.
        Start searching at the last block referenced; this may benefit
@@ -74,12 +75,12 @@ void mfree(struct mdesc *mdp, void *ptr)
       mdp->heapinfo[i].free_block.size += mdp->heapinfo[block].busy_block.size;
       /* Mark all my ex-blocks as free */
       for (it=0; it<mdp->heapinfo[block].busy_block.size; it++) {
-    	  if (mdp->heapinfo[block+it].type <0) {
-      		fprintf(stderr,"Internal Error: Asked to free a block already marked as free (block=%lu it=%d type=%lu). Please report this bug.\n",
-      				(unsigned long)block,it,(unsigned long)mdp->heapinfo[block].type);
-      		abort();
-    	  }
-    	  mdp->heapinfo[block+it].type = -1;
+        if (mdp->heapinfo[block+it].type <0) {
+          fprintf(stderr,"Internal Error: Asked to free a block already marked as free (block=%lu it=%d type=%lu). Please report this bug.\n",
+                  (unsigned long)block,it,(unsigned long)mdp->heapinfo[block].type);
+          abort();
+        }
+        mdp->heapinfo[block+it].type = -1;
       }
 
       block = i;
@@ -94,12 +95,12 @@ void mfree(struct mdesc *mdp, void *ptr)
       mdp -> heapstats.chunks_free++;
       /* Mark all my ex-blocks as free */
       for (it=0; it<mdp->heapinfo[block].free_block.size; it++) {
-    	  if (mdp->heapinfo[block+it].type <0) {
-      		fprintf(stderr,"Internal error: Asked to free a block already marked as free (block=%lu it=%d/%lu type=%lu). Please report this bug.\n",
-      				(unsigned long)block,it,(unsigned long)mdp->heapinfo[block].free_block.size,(unsigned long)mdp->heapinfo[block].type);
-      		abort();
-    	  }
-    	  mdp->heapinfo[block+it].type = -1;
+        if (mdp->heapinfo[block+it].type <0) {
+          fprintf(stderr,"Internal error: Asked to free a block already marked as free (block=%lu it=%d/%lu type=%lu). Please report this bug.\n",
+                  (unsigned long)block,it,(unsigned long)mdp->heapinfo[block].free_block.size,(unsigned long)mdp->heapinfo[block].type);
+          abort();
+        }
+        mdp->heapinfo[block+it].type = -1;
       }
     }
 
@@ -109,29 +110,29 @@ void mfree(struct mdesc *mdp, void *ptr)
     if (block + mdp->heapinfo[block].free_block.size ==
         mdp->heapinfo[block].free_block.next) {
       mdp->heapinfo[block].free_block.size
-          += mdp->heapinfo[mdp->heapinfo[block].free_block.next].free_block.size;
+        += mdp->heapinfo[mdp->heapinfo[block].free_block.next].free_block.size;
       mdp->heapinfo[block].free_block.next
-          = mdp->heapinfo[mdp->heapinfo[block].free_block.next].free_block.next;
+        = mdp->heapinfo[mdp->heapinfo[block].free_block.next].free_block.next;
       mdp->heapinfo[mdp->heapinfo[block].free_block.next].free_block.prev = block;
       mdp -> heapstats.chunks_free--;
     }
 
     /* Now see if we can return stuff to the system.  */
     /*    blocks = mdp -> heapinfo[block].free.size;
-       if (blocks >= FINAL_FREE_BLOCKS && block + blocks == mdp -> heaplimit
-       && mdp -> morecore (mdp, 0) == ADDRESS (block + blocks))
-       {
-       register size_t bytes = blocks * BLOCKSIZE;
-       mdp -> heaplimit -= blocks;
-       mdp -> morecore (mdp, -bytes);
-       mdp -> heapinfo[mdp -> heapinfo[block].free.prev].free.next
-       = mdp -> heapinfo[block].free.next;
-       mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.prev
-       = mdp -> heapinfo[block].free.prev;
-       block = mdp -> heapinfo[block].free.prev;
-       mdp -> heapstats.chunks_free--;
-       mdp -> heapstats.bytes_free -= bytes;
-       } */
+          if (blocks >= FINAL_FREE_BLOCKS && block + blocks == mdp -> heaplimit
+          && mdp -> morecore (mdp, 0) == ADDRESS (block + blocks))
+          {
+          register size_t bytes = blocks * BLOCKSIZE;
+          mdp -> heaplimit -= blocks;
+          mdp -> morecore (mdp, -bytes);
+          mdp -> heapinfo[mdp -> heapinfo[block].free.prev].free.next
+          = mdp -> heapinfo[block].free.next;
+          mdp -> heapinfo[mdp -> heapinfo[block].free.next].free.prev
+          = mdp -> heapinfo[block].free.prev;
+          block = mdp -> heapinfo[block].free.prev;
+          mdp -> heapstats.chunks_free--;
+          mdp -> heapstats.bytes_free -= bytes;
+          } */
 
     /* Set the next search to begin at this block.  */
     mdp->heapindex = block;
@@ -139,16 +140,25 @@ void mfree(struct mdesc *mdp, void *ptr)
 
   default:
     /* Do some of the statistics.  */
-      mdp -> heapstats.chunks_used--;
-      mdp -> heapstats.bytes_used -= 1 << type;
-      mdp -> heapstats.chunks_free++;
-      mdp -> heapstats.bytes_free += 1 << type;
+    mdp -> heapstats.chunks_used--;
+    mdp -> heapstats.bytes_used -= 1 << type;
+    mdp -> heapstats.chunks_free++;
+    mdp -> heapstats.bytes_free += 1 << type;
 
-    
     /* Get the address of the first free fragment in this block.  */
     prev = (struct list *)
-        ((char *) ADDRESS(block) +
-         (mdp->heapinfo[block].busy_frag.first << type));
+      ((char *) ADDRESS(block) +
+       (mdp->heapinfo[block].busy_frag.first << type));
+
+    frag_nb = RESIDUAL(ptr, BLOCKSIZE) >> type;
+
+    if( mdp->heapinfo[block].busy_frag.frag_size[frag_nb] == -1){
+      UNLOCK(mdp);
+      THROWF(system_error, 0, "Asked to free a fragment that is already free. I'm puzzled\n");
+    }
+
+    /* Set size used in the fragment to -1 */
+    mdp->heapinfo[block].busy_frag.frag_size[frag_nb] = -1;
 
     if (mdp->heapinfo[block].busy_frag.nfree ==
         (BLOCKSIZE >> type) - 1) {
@@ -189,11 +199,10 @@ void mfree(struct mdesc *mdp, void *ptr)
     } else {
       /* No fragments of this block were free before the one we just released,
        * so link this fragment into the fragment list and announce that
-         it is the first free fragment of this block. */
+       it is the first free fragment of this block. */
       prev = (struct list *) ptr;
       mdp->heapinfo[block].busy_frag.nfree = 1;
-      mdp->heapinfo[block].busy_frag.first =
-          RESIDUAL(ptr, BLOCKSIZE) >> type;
+      mdp->heapinfo[block].busy_frag.first = frag_nb;
       prev->next = mdp->fraghead[type].next;
       prev->prev = &mdp->fraghead[type];
       prev->prev->next = prev;