+ return heap;
+}
+
+#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
+
+/** Constructor functions used to initialize the malloc implementation
+ */
+static void __attribute__((constructor(101))) mm_legacy_constructor()
+{
+ __malloc_use_mmalloc = getenv(MC_ENV_VARIABLE) ? 1 : 0;
+ if (__malloc_use_mmalloc) {
+ __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_no_memset(size_t n)
+{
+ if (!__malloc_use_mmalloc) {
+ return mm_real_malloc(n);
+ }
+
+ xbt_mheap_t mdp = GET_HEAP();
+ if (!mdp)
+ return NULL;
+
+ LOCK(mdp);
+ void *ret = mmalloc_no_memset(mdp, n);
+ UNLOCK(mdp);
+ return ret;