-#if USE_MPROTECT_SNAPSHOT
-
-/** @brief Global mspace reference for the user's snapshotting heap */
-mspace user_snapshot_space = NULL;
-
-/** Check whether this is bootstrapped memory that we should not free */
-static bool DontFree(void *ptr)
-{
- return (ptr >= (&bootstrapmemory[0]) && ptr < (&bootstrapmemory[BOOTSTRAPBYTES]));
-}
-
-/**
- * @brief The allocator function for "user" allocation
- *
- * Should only be used for allocations which will not disturb the allocation
- * patterns of a user thread.
- */
-static void * user_malloc(size_t size)
-{
- void *tmp = mspace_malloc(user_snapshot_space, size);
- ASSERT(tmp);
- return tmp;
-}
-
-/**
- * @brief Snapshotting malloc implementation for user programs
- *
- * Do NOT call this function from a model-checker context. Doing so may disrupt
- * the allocation patterns of a user thread.
- */
-void *malloc(size_t size)
-{
- if (user_snapshot_space) {
- if (switch_alloc) {
- return model_malloc(size);
- }
- /* Only perform user allocations from user context */
- ASSERT(!model || thread_current());
- return user_malloc(size);
- } else
- return HandleEarlyAllocationRequest(size);
-}
-
-/** @brief Snapshotting free implementation for user programs */
-void free(void * ptr)
-{
- if (!DontFree(ptr)) {
- if (switch_alloc) {
- return model_free(ptr);
- }
- mspace_free(user_snapshot_space, ptr);
- }
-}
-
-/** @brief Snapshotting realloc implementation for user programs */
-void *realloc(void *ptr, size_t size)
-{
- void *tmp = mspace_realloc(user_snapshot_space, ptr, size);
- ASSERT(tmp);
- return tmp;
-}
-
-/** @brief Snapshotting calloc implementation for user programs */
-void * calloc(size_t num, size_t size)
-{
- if (user_snapshot_space) {
- void *tmp = mspace_calloc(user_snapshot_space, num, size);
- ASSERT(tmp);
- return tmp;
- } else {
- void *tmp = HandleEarlyAllocationRequest(size * num);
- memset(tmp, 0, size * num);
- return tmp;
- }
-}
-