-/* Copyright (c) 2010. The SimGrid Team.
+/* Copyright (c) 2010-2014. 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. */
/* Redefine the classical malloc/free/realloc functions so that they fit well in the mmalloc framework */
+#define _GNU_SOURCE
+
+#include <stdlib.h>
+
+#include <dlfcn.h>
#include "mmprivate.h"
+#include "xbt_modinter.h"
#include "internal_config.h"
#include <math.h>
+//#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
}
#ifdef MMALLOC_WANT_OVERRIDE_LEGACY
+
+/* Fake implementations, they are used to fool dlsym:
+ * dlsym used calloc and falls back to some other mechanism
+ * if this fails.
+ */
+static void* mm_fake_calloc(size_t nmemb, size_t size) { return NULL; }
+static void* mm_fake_malloc(size_t n) { return NULL; }
+static void* mm_fake_realloc(void *p, size_t s) { return NULL; }
+
+/* Function signatures for the main malloc functions: */
+typedef void* (*mm_malloc_t)(size_t size);
+typedef void (*mm_free_t)(void*);
+typedef void* (*mm_calloc_t)(size_t nmemb, size_t size);
+typedef void* (*mm_realloc_t)(void *ptr, size_t size);
+
+/* Function pointers to the real/next implementations: */
+static mm_malloc_t mm_real_malloc = mm_fake_malloc;
+static mm_free_t mm_real_free;
+static mm_calloc_t mm_real_calloc = mm_fake_calloc;
+static mm_realloc_t mm_real_realloc = mm_fake_realloc;
+
+#define GET_HEAP() __mmalloc_current_heap
+
+static const char* env_name = "SIMGRID_MALLOC_USE_MM";
+
+int mmalloc_exec_using_mm(int argc, const char** argv)
+{
+ char** argv2 = (char**) malloc(sizeof(char*) * (argc+1));
+ memcpy(argv2, argv, sizeof(char*) * argc);
+ argv2[argc] = NULL;
+ if (setenv(env_name, "1", 1) >= 0) {
+ execv(argv[0], argv2);
+ }
+ unsetenv(env_name);
+ fprintf(stderr, "Could not restart with mm malloc\n");
+ free(argv2);
+ return -1;
+}
+
+void mmalloc_ensure_using_mm(int argc, const char** argv)
+{
+ if (!__mmalloc_default_mdp) {
+ mmalloc_exec_using_mm(argc, argv);
+ }
+}
+
+/** Constructor functions used to initialize the malloc implementation
+ */
+static void __attribute__((constructor(101))) mm_legacy_constructor()
+{
+ bool use_mm = getenv(env_name);
+ if (use_mm) {
+ __mmalloc_current_heap = mmalloc_preinit();
+ } else {
+ mm_real_realloc = (mm_realloc_t) dlsym(RTLD_NEXT, "realloc");
+ mm_real_malloc = (mm_malloc_t) dlsym(RTLD_NEXT, "malloc");
+ mm_real_free = (mm_free_t) dlsym(RTLD_NEXT, "free");
+ mm_real_calloc = (mm_calloc_t) dlsym(RTLD_NEXT, "calloc");
+ }
+}
+
void *malloc(size_t n)
{
- xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+ if (!__mmalloc_current_heap) {
+ return mm_real_malloc(n);
+ }
+
+ xbt_mheap_t mdp = GET_HEAP();
+ if (!mdp)
+ return NULL;
LOCK(mdp);
void *ret = mmalloc(mdp, n);
UNLOCK(mdp);
-
return ret;
}
void *calloc(size_t nmemb, size_t size)
{
- xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+ if (!__mmalloc_current_heap) {
+ return mm_real_calloc(nmemb, size);
+ }
+
+ xbt_mheap_t mdp = GET_HEAP();
+ if (!mdp)
+ return NULL;
LOCK(mdp);
void *ret = mmalloc(mdp, nmemb*size);
UNLOCK(mdp);
- memset(ret, 0, nmemb * size);
-
-
+ // This was already done in the callee:
+ if(!(mdp->options & XBT_MHEAP_OPTION_MEMSET)) {
+ memset(ret, 0, nmemb * size);
+ }
return ret;
}
void *realloc(void *p, size_t s)
{
- void *ret = NULL;
- xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+ if (!__mmalloc_current_heap) {
+ return mm_real_realloc(p, s);
+ }
+
+ xbt_mheap_t mdp = GET_HEAP();
+ if (!mdp)
+ return NULL;
LOCK(mdp);
- ret = mrealloc(mdp, p, s);
+ void* ret = mrealloc(mdp, p, s);
UNLOCK(mdp);
-
return ret;
}
void free(void *p)
{
- if (p != NULL) {
- xbt_mheap_t mdp = __mmalloc_current_heap ?: (xbt_mheap_t) mmalloc_preinit();
+ if (!p)
+ return;
- LOCK(mdp);
- mfree(mdp, p);
- UNLOCK(mdp);
+ if (!__mmalloc_current_heap) {
+ mm_real_free(p);
+ return;
}
-}
-#endif
-
+ xbt_mheap_t mdp = GET_HEAP();
+ LOCK(mdp);
+ mfree(mdp, p);
+ UNLOCK(mdp);
+}
+#endif /* WANT_MALLOC_OVERRIDE */
