X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/a76bc40240b725442f23738d4d5603cb10d4baf6..49b058066db4e2b4e78b9f7924dd3795a024d94a:/src/xbt/mmalloc/mm_legacy.c

diff --git a/src/xbt/mmalloc/mm_legacy.c b/src/xbt/mmalloc/mm_legacy.c
index f757d7cd65..2a1a5863ce 100644
--- a/src/xbt/mmalloc/mm_legacy.c
+++ b/src/xbt/mmalloc/mm_legacy.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010. The SimGrid Team.
+/* Copyright (c) 2010-2013. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -7,11 +7,10 @@
 /* Redefine the classical malloc/free/realloc functions so that they fit well in the mmalloc framework */
 
 #include "mmprivate.h"
-#include "gras_config.h"
+#include "internal_config.h"
 #include <math.h>
 
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_mm_legacy, xbt,
-                                "Logging specific to mm_legacy in mmalloc");
+//#define MM_LEGACY_VERBOSE 1 /* define this to see which version of malloc gets used */
 
 /* The mmalloc() package can use a single implicit malloc descriptor
    for mmalloc/mrealloc/mfree operations which do not supply an explicit
@@ -32,7 +31,124 @@ 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
+#ifdef HAVE_GNU_LD
+
+#undef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#include <dlfcn.h>
+
+static void * (*real_malloc) (size_t);
+static void * (*real_realloc) (void*,size_t);
+static void * (*real_free) (void*);
+
+static void mm_gnuld_legacy_init(void) { /* This function is called from mmalloc_preinit(); it works even if it's static because all mm is in mm.c */
+  real_malloc = (void * (*) (size_t)) dlsym(RTLD_NEXT, "malloc");
+  real_realloc = (void * (*) (void*,size_t)) dlsym(RTLD_NEXT, "realloc");
+  real_free = (void * (*) (void*)) dlsym(RTLD_NEXT, "free");
+  __mmalloc_current_heap = __mmalloc_default_mdp;
+}
+
+/* Hello pimple!
+ * DL needs some memory while resolving the malloc symbol, that is somehow problematic
+ * To that extend, we have a little area here living in .BSS that we return if asked for memory before the malloc is resolved.
+ */
+int allocated_junk=0; /* keep track of whether our little area was already given to someone */
+char junkarea[4096];
+
+/* This version use mmalloc if there is a current heap, or the legacy implem if not */
+void *malloc(size_t n) {
+  xbt_mheap_t mdp = __mmalloc_current_heap;
+  void *ret;
+#ifdef MM_LEGACY_VERBOSE
+  static int warned_raw = 0;
+  static int warned_mmalloc = 0;
+#endif
+
+  if (mdp) {
+    LOCK(mdp);
+    ret = mmalloc(mdp, n);
+    UNLOCK(mdp);
+#ifdef MM_LEGACY_VERBOSE
+    if (!warned_mmalloc) {
+      fprintf(stderr,"Using mmalloc; enabling the model-checker in cmake may have a bad impact on your simulation performance\n");
+      warned_mmalloc = 1;
+    }
+#endif
+  } else {
+    if (!real_malloc) {
+      if (allocated_junk) {
+        fprintf(stderr,
+            "Panic: real malloc symbol not resolved yet, and I already gave my little private memory chunk away. "
+            "Damn LD, we must extend our code to have several such areas.\n");
+        exit(1);
+      } else if (n > sizeof junkarea) {
+        fprintf(stderr,
+            "Panic: real malloc symbol not resolved yet, and I need %zu bytes while my little private memory chunk is only %zu bytes wide. "
+            "Damn LD, we must fix our code to extend this area.\n", n, sizeof junkarea);
+        exit(1);
+      } else {
+        allocated_junk = 1;
+        return junkarea;
+      }
+    }
+#ifdef MM_LEGACY_VERBOSE
+    if (!warned_raw) {
+      fprintf(stderr,"Using system malloc after interception; you seem to be currently model-checking\n");
+      warned_raw = 1;
+    }
+#endif
+    ret = real_malloc(n);
+  }
+  return ret;
+}
+
+
+void *calloc(size_t nmemb, size_t size)
+{
+  void *ret = malloc(nmemb*size);
+  memset(ret, 0, nmemb * size);
+  return ret;
+}
+
+void *realloc(void *p, size_t s)
+{
+  xbt_mheap_t mdp = __mmalloc_current_heap;
+  void *ret;
+
+  if (mdp) {
+    LOCK(mdp);
+    ret = mrealloc(mdp, p, s);
+    UNLOCK(mdp);
+  } else {
+    ret = real_realloc(p,s);
+  }
+
+  return ret;
+}
+
+void free(void *p)
+{
+  if (p==NULL)
+    return;
+  if (p!=junkarea) {
+    xbt_mheap_t mdp = __mmalloc_current_heap;
+
+    if (mdp) {
+      LOCK(mdp);
+      mfree(mdp, p);
+      UNLOCK(mdp);
+    } else {
+      real_free(p);
+    }
+  } else {
+    allocated_junk=0;
+  }
+}
+
+
+#else /* NO GNU_LD */
 void *malloc(size_t n)
 {
   xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
@@ -49,8 +165,10 @@ void *calloc(size_t nmemb, size_t size)
   xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
 
   LOCK(mdp);
-  void *ret = mcalloc(mdp, nmemb,size);
+  void *ret = mmalloc(mdp, nmemb*size);
   UNLOCK(mdp);
+  memset(ret, 0, nmemb * size);
+
 
   return ret;
 }
@@ -69,394 +187,15 @@ void *realloc(void *p, size_t s)
 
 void free(void *p)
 {
-  xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
-
-  LOCK(mdp);
-  mfree(mdp, p);
-  UNLOCK(mdp);
-}
-#endif
-
-
-int mmalloc_compare_heap(xbt_mheap_t mdp1, xbt_mheap_t mdp2, void *std_heap_addr){
-
-  if(mdp1 == NULL && mdp2 == NULL){
-    XBT_DEBUG("Malloc descriptors null");
-    return 0;
-  }
-
-  /* Heapstats */
-
-  int errors = mmalloc_compare_mdesc(mdp1, mdp2, std_heap_addr);
-
-  return (errors > 0);
-
-}
-
-int mmalloc_compare_mdesc(struct mdesc *mdp1, struct mdesc *mdp2, void *std_heap_addr){
-
-  int errors = 0;
-
-  if(mdp1->headersize != mdp2->headersize){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different size of the file header for the mapped files");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  if(mdp1->refcount != mdp2->refcount){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different number of processes that attached the heap");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
- 
-  if(strcmp(mdp1->magic, mdp2->magic) != 0){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different magic number");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  if(mdp1->flags != mdp2->flags){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different flags");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  if(mdp1->heapsize != mdp2->heapsize){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different number of info entries");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  //XBT_DEBUG("Heap size : %zu", mdp1->heapsize);
-
-  if(mdp1->heapbase != mdp2->heapbase){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different first block of the heap");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-
-  if(mdp1->heapindex != mdp2->heapindex){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different index for the heap table : %zu - %zu", mdp1->heapindex, mdp2->heapindex);
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  //XBT_DEBUG("Heap index : %zu", mdp1->heapindex);
-
-  if(mdp1->base != mdp2->base){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different base address of the memory region");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  if(mdp1->breakval != mdp2->breakval){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different current location in the memory region");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  if(mdp1->top != mdp2->top){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different end of the current location in the memory region");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-  
-  if(mdp1->heaplimit != mdp2->heaplimit){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different limit of valid info table indices");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  if(mdp1->fd != mdp2->fd){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different file descriptor for the file to which this malloc heap is mapped");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
+  if (p != NULL) {
+    xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
 
-   if(mdp1->version != mdp2->version){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different version of the mmalloc package");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
- 
-  size_t block_free1, block_free2 , next_block_free, first_block_free, block_free ;
-  size_t i, j;
-  void *addr_block1, *addr_block2;
-  size_t frag_size;
- 
-
-  /* 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){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different first free block");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  first_block_free = block_free1;
-
-  if(mdp1->heapinfo[first_block_free].free.size != mdp2->heapinfo[first_block_free].free.size){ 
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different size (in blocks) of the first free cluster");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-
-  /* Check busy blocks (circular checking)*/
-
-  i = first_block_free + mdp1->heapinfo[first_block_free].free.size;
-
-  if(mdp1->heapinfo[first_block_free].free.next != mdp2->heapinfo[first_block_free].free.next){
-    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-      XBT_DEBUG("Different next block free");
-      errors++;
-    }else{
-      return 1;
-    }
-  }
-  
-  block_free = first_block_free;
-  next_block_free = mdp1->heapinfo[first_block_free].free.next;
-
-  if(next_block_free == 0)
-    next_block_free = mdp1->heaplimit;
-
-  while(i != first_block_free){
-
-    while(i<next_block_free){
-
-      if(mdp1->heapinfo[i].busy.type != mdp2->heapinfo[i].busy.type){
-	if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-	  XBT_DEBUG("Different type of busy block");
-	  errors++;
-	}else{
-	  return 1;
-	}
-      }else{
-
-	addr_block1 = (char *)mdp1 + sizeof(struct mdesc) + ((i-1) * BLOCKSIZE); 
-	addr_block2 = (char *)mdp2 + sizeof(struct mdesc) + ((i-1) * BLOCKSIZE); 
-	
-	switch(mdp1->heapinfo[i].busy.type){
-	case 0 :
-	  if(mdp1->heapinfo[i].busy.info.block.size != mdp2->heapinfo[i].busy.info.block.size){
-	    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-	      XBT_DEBUG("Different size of a large cluster");
-	      errors++;
-	    }else{
-	      return 1;
-	    }
-	  }else{
-	    if(memcmp(addr_block1, addr_block2, (mdp1->heapinfo[i].busy.info.block.size * BLOCKSIZE)) != 0){
-	      if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){	      
-		XBT_DEBUG("Different data in block %zu (size = %zu) (addr_block1 = %p (current = %p) - addr_block2 = %p)", i, mdp1->heapinfo[i].busy.info.block.size, addr_block1, (char *)std_heap_addr + sizeof(struct mdesc) + ((i-1) * BLOCKSIZE), addr_block2);
-		errors++;
-	      }else{
-		return 1;
-	      }
-	    } 
-	  }
-	  i = i+mdp1->heapinfo[i].busy.info.block.size;
-
-	  break;
-	default :	  
-	  if(mdp1->heapinfo[i].busy.info.frag.nfree != mdp2->heapinfo[i].busy.info.frag.nfree){
-	    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-	      XBT_DEBUG("Different free fragments in the fragmented block %zu", i);
-	      errors++;
-	    }else{
-	      return 1;
-	    }
-	  }else{
-	    if(mdp1->heapinfo[i].busy.info.frag.first != mdp2->heapinfo[i].busy.info.frag.first){
-	      if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-		XBT_DEBUG("Different first free fragments in the block %zu", i);
-		errors++;
-	      }else{
-		return 1;
-	      } 
-	    }else{
-	      frag_size = pow(2,mdp1->heapinfo[i].busy.type);
-	      for(j=0 ; j< (BLOCKSIZE/frag_size); j++){
-		if(memcmp((char *)addr_block1 + (j * frag_size), (char *)addr_block2 + (j * frag_size), frag_size) != 0){
-		  if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-		    XBT_DEBUG("Different data in fragment %zu (addr_frag1 = %p - addr_frag2 = %p) of block %zu", j + 1, (char *)addr_block1 + (j * frag_size), (char *)addr_block2 + (j * frag_size),  i);
-		    errors++;
-		  }else{
-		    return 1;
-		  }
-		} 
-	      }
-	    }
-	  }
-
-	  i++;
-
-	  break;
-	}
-
-      }
-    }
-
-    if( i != first_block_free){
-
-      if(mdp1->heapinfo[block_free].free.next != mdp2->heapinfo[block_free].free.next){
-	if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-	  XBT_DEBUG("Different next block free");
-	  errors++;
-	}else{
-	  return 1;
-	}
-      }
-     
-      block_free = mdp1->heapinfo[block_free].free.next;
-      next_block_free = mdp1->heapinfo[block_free].free.next;
-
-      i = block_free + mdp1->heapinfo[block_free].free.size;
-
-      if((next_block_free == 0) && (i != mdp1->heaplimit)){
-
-	while(i < mdp1->heaplimit){
-
-	  if(mdp1->heapinfo[i].busy.type != mdp2->heapinfo[i].busy.type){
-	    if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-	      XBT_DEBUG("Different type of busy block");
-	      errors++;
-	    }else{
-	      return 1;
-	    }
-	  }else{
-
-	    addr_block1 = (char *)mdp1 + sizeof(struct mdesc) + ((i-1) * BLOCKSIZE); 
-	    addr_block2 = (char *)mdp2 + sizeof(struct mdesc) + ((i-1) * BLOCKSIZE); 
-	
-	    switch(mdp1->heapinfo[i].busy.type){
-	    case 0 :
-	      if(mdp1->heapinfo[i].busy.info.block.size != mdp2->heapinfo[i].busy.info.block.size){
-		if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-		  XBT_DEBUG("Different size of a large cluster");
-		  errors++;
-		}else{
-		  return 1;
-		}
-	      }else{
-		if(memcmp(addr_block1, addr_block2, (mdp1->heapinfo[i].busy.info.block.size * BLOCKSIZE)) != 0){
-		  if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){	      
-		    XBT_DEBUG("Different data in block %zu (addr_block1 = %p (current = %p) - addr_block2 = %p)", i, addr_block1, (char *)std_heap_addr + sizeof(struct mdesc) + ((i-1) * BLOCKSIZE), addr_block2);
-		    errors++;
-		  }else{
-		    return 1;
-		  }
-		} 
-	      }
-	    
-	      i = i+mdp1->heapinfo[i].busy.info.block.size;
-
-	      break;
-	    default :	  
-	      if(mdp1->heapinfo[i].busy.info.frag.nfree != mdp2->heapinfo[i].busy.info.frag.nfree){
-		if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-		  XBT_DEBUG("Different free fragments in the fragmented block %zu", i);
-		  errors++;
-		}else{
-		  return 1;
-		}
-	      }else{
-		if(mdp1->heapinfo[i].busy.info.frag.first != mdp2->heapinfo[i].busy.info.frag.first){
-		  if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-		    XBT_DEBUG("Different first free fragments in the block %zu", i);
-		    errors++;
-		  }else{
-		    return 1;
-		  } 
-		}else{
-		  frag_size = pow(2,mdp1->heapinfo[i].busy.type);
-		  for(j=0 ; j< (BLOCKSIZE/frag_size); j++){
-		    if(memcmp((char *)addr_block1 + (j * frag_size), (char *)addr_block2 + (j * frag_size), frag_size) != 0){
-		      if(XBT_LOG_ISENABLED(xbt_mm_legacy, xbt_log_priority_debug)){
-			XBT_DEBUG("Different data in fragment %zu (addr_frag1 = %p - addr_frag2 = %p) of block %zu", j + 1, (char *)addr_block1 + (j * frag_size), (char *)addr_block2 + (j * frag_size),  i);
-			errors++;
-		      }else{
-			return 1;
-		      }
-		    } 
-		  }
-		}
-	      }
-
-	      i++;
-
-	      break;
-	    }
-	  }
-	}
-
-      }
-
-    }
+    LOCK(mdp);
+    mfree(mdp, p);
+    UNLOCK(mdp);
   }
-  
-  return (errors>0);    
 }
+#endif /* NO GNU_LD */
+#endif /* WANT_MALLOC_OVERRIDE */
 
- 
-void mmalloc_display_info_heap(xbt_mheap_t h){
 
-}