+/** @brief Snapshotting free function for use by the Thread class only */
+void Thread_free(void *ptr)
+{
+ snapshot_free(ptr);
+}
+
+void * (*volatile real_memcpy)(void * dst, const void *src, size_t n) = NULL;
+void * (*volatile real_memmove)(void * dst, const void *src, size_t len) = NULL;
+void (*volatile real_bzero)(void * dst, size_t len) = NULL;
+void * (*volatile real_memset)(void * dst, int c, size_t len) = NULL;
+
+void init_memory_ops()
+{
+ if (!real_memcpy) {
+ real_memcpy = (void * (*)(void * dst, const void *src, size_t n)) 1;
+ real_memcpy = (void * (*)(void * dst, const void *src, size_t n))dlsym(RTLD_NEXT, "memcpy");
+ }
+ if (!real_memmove) {
+ real_memmove = (void * (*)(void * dst, const void *src, size_t n)) 1;
+ real_memmove = (void * (*)(void * dst, const void *src, size_t n))dlsym(RTLD_NEXT, "memmove");
+ }
+ if (!real_memset) {
+ real_memset = (void * (*)(void * dst, int c, size_t n)) 1;
+ real_memset = (void * (*)(void * dst, int c, size_t n))dlsym(RTLD_NEXT, "memset");
+ }
+ if (!real_bzero) {
+ real_bzero = (void (*)(void * dst, size_t len)) 1;
+ real_bzero = (void (*)(void * dst, size_t len))dlsym(RTLD_NEXT, "bzero");
+ }
+}
+
+void * memcpy(void * dst, const void * src, size_t n) {
+ if (model && !inside_model) {
+ //model_print("memcpy size: %d\n", n);
+ thread_id_t tid = thread_current_id();
+ raceCheckReadMemop(tid, (void *)src, n);
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_memcpy) < 2) {
+ for(uint i=0;i<n;i++) {
+ ((volatile char *)dst)[i] = ((char *)src)[i];
+ }
+ return dst;
+ }
+ return real_memcpy(dst, src, n);
+}
+
+void * memmove(void * dst, const void * src, size_t n) {
+ if (model && !inside_model) {
+ thread_id_t tid = thread_current_id();
+ raceCheckReadMemop(tid, (void *)src, n);
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_memmove) < 2) {
+ if (((uintptr_t)dst) < ((uintptr_t)src))
+ for(uint i=0;i<n;i++) {
+ ((volatile char *)dst)[i] = ((char *)src)[i];
+ }
+ else
+ for(uint i=n;i!=0; ) {
+ i--;
+ ((volatile char *)dst)[i] = ((char *)src)[i];
+ }
+ return dst;
+ }
+ return real_memmove(dst, src, n);
+}
+
+void * memset(void *dst, int c, size_t n) {
+ if (model && !inside_model) {
+ //model_print("memset size: %d\n", n);
+ thread_id_t tid = thread_current_id();
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_memset) < 2) {
+ //stuck in dynamic linker alloc cycle...
+ for(size_t s=0;s<n;s++) {
+ ((volatile char *)dst)[s] = (char) c;
+ }
+ return dst;
+ }
+ return real_memset(dst, c, n);
+}
+
+void bzero(void *dst, size_t n) {
+ if (model && !inside_model) {
+ thread_id_t tid = thread_current_id();
+ raceCheckWriteMemop(tid, (void *)dst, n);
+ } else if (((uintptr_t)real_bzero) < 2) {
+ for(size_t s=0;s<n;s++) {
+ ((volatile char *)dst)[s] = 0;
+ }
+ return;
+ }
+ real_bzero(dst, n);