12 #include "threads-model.h"
16 #define REQUESTS_BEFORE_ALLOC 1024
18 size_t allocatedReqs[REQUESTS_BEFORE_ALLOC] = { 0 };
21 mspace sStaticSpace = NULL;
23 /** Non-snapshotting calloc for our use. */
24 void *model_calloc(size_t count, size_t size)
26 return mspace_calloc(sStaticSpace, count, size);
29 /** Non-snapshotting malloc for our use. */
30 void *model_malloc(size_t size)
32 return mspace_malloc(sStaticSpace, size);
35 /** Non-snapshotting malloc for our use. */
36 void *model_realloc(void *ptr, size_t size)
38 return mspace_realloc(sStaticSpace, ptr, size);
41 /** @brief Snapshotting malloc, for use by model-checker (not user progs) */
42 void * snapshot_malloc(size_t size)
44 void *tmp = mspace_malloc(model_snapshot_space, size);
49 /** @brief Snapshotting calloc, for use by model-checker (not user progs) */
50 void * snapshot_calloc(size_t count, size_t size)
52 void *tmp = mspace_calloc(model_snapshot_space, count, size);
57 /** @brief Snapshotting realloc, for use by model-checker (not user progs) */
58 void *snapshot_realloc(void *ptr, size_t size)
60 void *tmp = mspace_realloc(model_snapshot_space, ptr, size);
65 /** @brief Snapshotting free, for use by model-checker (not user progs) */
66 void snapshot_free(void *ptr)
68 mspace_free(model_snapshot_space, ptr);
71 /** Non-snapshotting free for our use. */
72 void model_free(void *ptr)
74 mspace_free(sStaticSpace, ptr);
77 /** Bootstrap allocation. Problem is that the dynamic linker calls require
78 * calloc to work and calloc requires the dynamic linker to work. */
80 #define BOOTSTRAPBYTES 131072
81 char bootstrapmemory[BOOTSTRAPBYTES];
84 void * HandleEarlyAllocationRequest(size_t sz)
86 /* Align to 8 byte boundary */
89 if (sz > (BOOTSTRAPBYTES-offset)) {
90 model_print("OUT OF BOOTSTRAP MEMORY. Increase the size of BOOTSTRAPBYTES in mymemory.cc\n");
94 void *pointer = (void *)&bootstrapmemory[offset];
99 /** @brief Global mspace reference for the model-checker's snapshotting heap */
100 mspace model_snapshot_space = NULL;
102 /** @brief Snapshotting allocation function for use by the Thread class only */
103 void * Thread_malloc(size_t size)
105 return snapshot_malloc(size);
108 /** @brief Snapshotting free function for use by the Thread class only */
109 void Thread_free(void *ptr)
114 void * (*volatile real_memcpy)(void * dst, const void *src, size_t n) = NULL;
115 void * (*volatile real_memmove)(void * dst, const void *src, size_t len) = NULL;
116 void (*volatile real_bzero)(void * dst, size_t len) = NULL;
117 void * (*volatile real_memset)(void * dst, int c, size_t len) = NULL;
119 void init_memory_ops()
122 real_memcpy = (void * (*)(void * dst, const void *src, size_t n)) 1;
123 real_memcpy = (void * (*)(void * dst, const void *src, size_t n))dlsym(RTLD_NEXT, "memcpy");
126 real_memmove = (void * (*)(void * dst, const void *src, size_t n)) 1;
127 real_memmove = (void * (*)(void * dst, const void *src, size_t n))dlsym(RTLD_NEXT, "memmove");
130 real_memset = (void * (*)(void * dst, int c, size_t n)) 1;
131 real_memset = (void * (*)(void * dst, int c, size_t n))dlsym(RTLD_NEXT, "memset");
134 real_bzero = (void (*)(void * dst, size_t len)) 1;
135 real_bzero = (void (*)(void * dst, size_t len))dlsym(RTLD_NEXT, "bzero");
139 void * memcpy(void * dst, const void * src, size_t n) {
140 if (model && !inside_model) {
141 //model_print("memcpy intercepted\n");
142 thread_id_t tid = thread_current_id();
143 if (((uintptr_t)src&7) == 0 && ((uintptr_t)dst&7) == 0 && (n&7) == 0) {
144 for (uint i = 0; i < (n>>3); i++) {
145 raceCheckRead64(tid, (void *)(((uint64_t *)src) + i));
146 ((volatile uint64_t *)dst)[i] = ((uint64_t *)src)[i];
147 raceCheckWrite64(tid, (void *)(((uint64_t *)dst) + i));
149 } else if (((uintptr_t)src&3) == 0 && ((uintptr_t)dst&3) == 0 && (n&3) == 0) {
150 for (uint i = 0; i < (n>>2); i++) {
151 raceCheckRead32(tid, (void *)(((uint32_t *)src) + i));
152 ((volatile uint32_t *)dst)[i] = ((uint32_t *)src)[i];
153 raceCheckWrite32(tid, (void *)(((uint32_t *)dst) + i));
155 } else if (((uintptr_t)src&1) == 0 && ((uintptr_t)dst&1) == 0 && (n&1) == 0) {
156 for (uint i = 0; i < (n>>1); i++) {
157 raceCheckRead16(tid, (void *)(((uint16_t *)src) + i));
158 ((volatile uint16_t *)dst)[i] = ((uint16_t *)src)[i];
159 raceCheckWrite16(tid, (void *)(((uint16_t *)dst) + i));
162 for(uint i=0;i<n;i++) {
163 raceCheckRead8(tid, (void *)(((char *)src) + i));
164 ((volatile char *)dst)[i] = ((char *)src)[i];
165 raceCheckWrite8(tid, (void *)(((char *)dst) + i));
169 if (((uintptr_t)real_memcpy) < 2) {
170 for(uint i=0;i<n;i++) {
171 ((volatile char *)dst)[i] = ((char *)src)[i];
176 return real_memcpy(dst, src, n);
181 void * memmove(void * dst, const void * src, size_t n) {
182 if (model && !inside_model) {
183 thread_id_t tid = thread_current_id();
184 if (((uintptr_t)src&7) == 0 && ((uintptr_t)dst&7) == 0 && (n&7) == 0) {
185 if (((uintptr_t)dst) < ((uintptr_t)src))
186 for (uint i = 0; i < (n>>3); i++) {
187 raceCheckRead64(tid, (void *)(((uint64_t *)src) + i));
188 ((volatile uint64_t *)dst)[i] = ((uint64_t *)src)[i];
189 raceCheckWrite64(tid, (void *)(((uint64_t *)dst) + i));
192 for (uint i = (n>>3); i != 0;) {
194 raceCheckRead64(tid, (void *)(((uint64_t *)src) + i));
195 ((volatile uint64_t *)dst)[i] = ((uint64_t *)src)[i];
196 raceCheckWrite64(tid, (void *)(((uint64_t *)dst) + i));
198 } else if (((uintptr_t)src&3) == 0 && ((uintptr_t)dst&3) == 0 && (n&3) == 0) {
199 if (((uintptr_t)dst) < ((uintptr_t)src))
200 for (uint i = 0; i < (n>>2); i++) {
201 raceCheckRead32(tid, (void *)(((uint32_t *)src) + i));
202 ((volatile uint32_t *)dst)[i] = ((uint32_t *)src)[i];
203 raceCheckWrite32(tid, (void *)(((uint32_t *)dst) + i));
206 for (uint i = (n>>2); i != 0;) {
208 raceCheckRead32(tid, (void *)(((uint32_t *)src) + i));
209 ((volatile uint32_t *)dst)[i] = ((uint32_t *)src)[i];
210 raceCheckWrite32(tid, (void *)(((uint32_t *)dst) + i));
212 } else if (((uintptr_t)src&1) == 0 && ((uintptr_t)dst&1) == 0 && (n&1) == 0) {
213 if (((uintptr_t)dst) < ((uintptr_t)src))
214 for (uint i = 0; i < (n>>1); i++) {
215 raceCheckRead16(tid, (void *)(((uint16_t *)src) + i));
216 ((volatile uint16_t *)dst)[i] = ((uint16_t *)src)[i];
217 raceCheckWrite16(tid, (void *)(((uint16_t *)dst) + i));
220 for (uint i = (n>>1); i != 0;) {
222 raceCheckRead16(tid, (void *)(((uint16_t *)src) + i));
223 ((volatile uint16_t *)dst)[i] = ((uint16_t *)src)[i];
224 raceCheckWrite16(tid, (void *)(((uint16_t *)dst) + i));
227 if (((uintptr_t)dst) < ((uintptr_t)src))
228 for(uint i = 0; i < n; i++) {
229 raceCheckRead8(tid, (void *)(((char *)src) + i));
230 ((volatile char *)dst)[i] = ((char *)src)[i];
231 raceCheckWrite8(tid, (void *)(((char *)dst) + i));
234 for(uint i = n; i != 0;) {
236 raceCheckRead8(tid, (void *)(((char *)src) + i));
237 ((volatile char *)dst)[i] = ((char *)src)[i];
238 raceCheckWrite8(tid, (void *)(((char *)dst) + i));
242 if (((uintptr_t)real_memmove) < 2) {
243 if (((uintptr_t)dst) < ((uintptr_t)src))
244 for(uint i=0;i<n;i++) {
245 ((volatile char *)dst)[i] = ((char *)src)[i];
248 for(uint i=n;i!=0; ) {
250 ((volatile char *)dst)[i] = ((char *)src)[i];
254 return real_memmove(dst, src, n);
259 void * memset(void *dst, int c, size_t n) {
260 if (model && !inside_model) {
261 thread_id_t tid = thread_current_id();
263 if (((uintptr_t)dst&7) == 0 && (n&7) == 0) {
264 for (uint i = 0; i < (n>>3); i++) {
265 uint16_t cs2 = cs << 8 | cs;
266 uint64_t cs3 = cs2 << 16 | cs2;
267 uint64_t cs4 = cs3 << 32 | cs3;
268 ((volatile uint64_t *)dst)[i] = cs4;
269 raceCheckWrite64(tid, (void *)(((uint64_t *)dst) + i));
271 } else if (((uintptr_t)dst&3) == 0 && (n&3) == 0) {
272 for (uint i = 0; i < (n>>2); i++) {
273 uint16_t cs2 = cs << 8 | cs;
274 uint32_t cs3 = cs2 << 16 | cs2;
275 ((volatile uint32_t *)dst)[i] = cs3;
276 raceCheckWrite32(tid, (void *)(((uint32_t *)dst) + i));
278 } else if (((uintptr_t)dst&1) == 0 && (n&1) == 0) {
279 for (uint i = 0; i < (n>>1); i++) {
280 uint16_t cs2 = cs << 8 | cs;
281 ((volatile uint16_t *)dst)[i] = cs2;
282 raceCheckWrite16(tid, (void *)(((uint16_t *)dst) + i));
285 for (uint i=0;i<n;i++) {
286 ((volatile char *)dst)[i] = cs;
287 raceCheckWrite8(tid, (void *)(((char *)dst) + i));
291 if (((uintptr_t)real_memset) < 2) {
292 //stuck in dynamic linker alloc cycle...
293 for(size_t s=0;s<n;s++) {
294 ((volatile char *)dst)[s] = (char) c;
298 return real_memset(dst, c, n);
303 void bzero(void *dst, size_t n) {
304 if (model && !inside_model) {
305 thread_id_t tid = thread_current_id();
306 if (((uintptr_t)dst&7) == 0 && (n&7) == 0) {
307 for (uint i = 0; i < (n>>3); i++) {
308 ((volatile uint64_t *)dst)[i] = 0;
309 raceCheckWrite64(tid, (void *)(((uint64_t *)dst) + i));
311 } else if (((uintptr_t)dst&3) == 0 && (n&3) == 0) {
312 for (uint i = 0; i < (n>>2); i++) {
313 ((volatile uint32_t *)dst)[i] = 0;
314 raceCheckWrite32(tid, (void *)(((uint32_t *)dst) + i));
316 } else if (((uintptr_t)dst&1) == 0 && (n&1) == 0) {
317 for (uint i = 0; i < (n>>1); i++) {
318 ((volatile uint16_t *)dst)[i] = 0;
319 raceCheckWrite16(tid, (void *)(((uint16_t *)dst) + i));
322 for (uint i=0;i<n;i++) {
323 ((volatile char *)dst)[i] = 0;
324 raceCheckWrite8(tid, (void *)(((char *)dst) + i));
328 if (((uintptr_t)real_bzero) < 2) {
329 for(size_t s=0;s<n;s++) {
330 ((volatile char *)dst)[s] = 0;