+/* Override the malloc-like functions if MC is activated at compile time */
+#if SIMGRID_HAVE_MC
+
+/* ***** Temporary allocator
+ *
+ * This is used before we have found the real malloc implementation with dlsym.
+ */
+
+#ifdef __FreeBSD__ /* FreeBSD require more memory, other might */
+# define BUFFER_SIZE 256
+#else /* Valid on: Linux */
+# define BUFFER_SIZE 32
+#endif
+static size_t fake_alloc_index;
+static uint64_t buffer[BUFFER_SIZE];
+
+/* 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_malloc(size_t n)
+{
+ // How many uint64_t do w need?
+ size_t count = n / sizeof(uint64_t);
+ if (n % sizeof(uint64_t))
+ count++;
+ // Check that we have enough available memory:
+ if (fake_alloc_index + count >= BUFFER_SIZE)
+ exit(127);
+ // Allocate it:
+ uint64_t* res = buffer + fake_alloc_index;
+ fake_alloc_index += count;
+ return res;
+}
+
+static void* mm_fake_calloc(size_t nmemb, size_t size)
+{
+ // This is fresh .bss data, we don't need to clear it:
+ size_t n = nmemb * size;
+ return mm_fake_malloc(n);
+}
+
+static void* mm_fake_realloc(XBT_ATTRIB_UNUSED void* p, size_t s)
+{
+ return mm_fake_malloc(s);
+}
+
+static void mm_fake_free(XBT_ATTRIB_UNUSED void* p)
+{
+ // Nothing to do
+}
+
+/* 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;
+static mm_free_t mm_real_free;
+static mm_calloc_t mm_real_calloc;
+static mm_realloc_t mm_real_realloc;
+
+static int mm_initializing;
+static int mm_initialized;
+
+/** Constructor functions used to initialize the malloc implementation
+ */
+XBT_ATTRIB_CONSTRUCTOR(101) static void mm_legacy_constructor()