+
+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 (false && model && !inside_model) {
+ thread_id_t tid = thread_current_id();
+ if (((uintptr_t)src&7) == 0 && ((uintptr_t)dst&7) == 0 && (n&7) == 0) {
+ for (uint i = 0; i < (n>>3); i++) {
+ raceCheckRead64(tid, (void *)(((char *)src) + i));
+ ((volatile uint64_t *)dst)[i] = ((uint64_t *)src)[i];
+ raceCheckWrite64(tid, (void *)(((char *)src) + i));
+ }
+ } else if (((uintptr_t)src&3) == 0 && ((uintptr_t)dst&3) == 0 && (n&3) == 0) {
+ for (uint i = 0; i < (n>>2); i++) {
+ raceCheckRead32(tid, (void *)(((char *)src) + i));
+ ((volatile uint32_t *)dst)[i] = ((uint32_t *)src)[i];
+ raceCheckWrite32(tid, (void *)(((char *)src) + i));
+ }
+ } else if (((uintptr_t)src&1) == 0 && ((uintptr_t)dst&1) == 0 && (n&1) == 0) {
+ for (uint i = 0; i < (n>>1); i++) {
+ raceCheckRead16(tid, (void *)(((char *)src) + i));
+ ((volatile uint16_t *)dst)[i] = ((uint16_t *)src)[i];
+ raceCheckWrite16(tid, (void *)(((char *)src) + i));
+ }
+ } else {
+ for(uint i=0;i<n;i++) {
+ raceCheckRead8(tid, (void *)(((char *)src) + i));
+ ((volatile char *)dst)[i] = ((char *)src)[i];
+ raceCheckWrite8(tid, (void *)(((char *)src) + i));
+ }
+ }
+ } 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);
+ }
+ return dst;
+}