3  * Copyright (c) 2013-2018 The strace developers.
42 	if (tcp->currpers != DEFAULT_PERSONALITY) {  in mmap_cache_invalidate()
48 	debug_func_msg("tgen=%u, ggen=%u, tcp=%p, cache=%p",  in mmap_cache_invalidate()
49 		       tcp->mmap_cache ? tcp->mmap_cache->generation : 0,  in mmap_cache_invalidate()
51 		       tcp->mmap_cache ? tcp->mmap_cache->entry : 0);  in mmap_cache_invalidate()
65 /* deleting the cache */
69 	debug_func_msg("tgen=%u, ggen=%u, tcp=%p, cache=%p, caller=%s",  in delete_mmap_cache()
70 		       tcp->mmap_cache ? tcp->mmap_cache->generation : 0,  in delete_mmap_cache()
72 		       tcp->mmap_cache ? tcp->mmap_cache->entry : 0, caller);  in delete_mmap_cache()
74 	if (!tcp->mmap_cache)  in delete_mmap_cache()
77 	while (tcp->mmap_cache->size) {  in delete_mmap_cache()
78 		unsigned int i = --tcp->mmap_cache->size;  in delete_mmap_cache()
79 		free(tcp->mmap_cache->entry[i].binary_filename);  in delete_mmap_cache()
80 		tcp->mmap_cache->entry[i].binary_filename = NULL;  in delete_mmap_cache()
83 	free(tcp->mmap_cache->entry);  in delete_mmap_cache()
84 	tcp->mmap_cache->entry = NULL;  in delete_mmap_cache()
86 	free(tcp->mmap_cache);  in delete_mmap_cache()
87 	tcp->mmap_cache = NULL;  in delete_mmap_cache()
93  * The cache must be refreshed after syscalls that affect memory mappings,
99 	if (tcp->mmap_cache  in mmap_cache_rebuild_if_invalid()
100 	    && tcp->mmap_cache->generation != mmap_cache_generation)  in mmap_cache_rebuild_if_invalid()
103 	if (tcp->mmap_cache)  in mmap_cache_rebuild_if_invalid()
107 	xsprintf(filename, "/proc/%u/maps", tcp->pid);  in mmap_cache_rebuild_if_invalid()
109 	FILE *fp = fopen_stream(filename, "r");  in mmap_cache_rebuild_if_invalid()
115 	struct mmap_cache_t cache = {  in mmap_cache_rebuild_if_invalid()  local
120 	/* start with a small dynamically-allocated array and then expand it */  in mmap_cache_rebuild_if_invalid()
133 		if (sscanf(buffer, "%lx-%lx %c%c%c%c %lx %lx:%lx %*d %[^\n]",  in mmap_cache_rebuild_if_invalid()
142 		if (!(read_bit == '-' || read_bit == 'r'))  in mmap_cache_rebuild_if_invalid()
144 		if (!(write_bit == '-' || write_bit == 'w'))  in mmap_cache_rebuild_if_invalid()
146 		if (!(exec_bit == '-' || exec_bit == 'x'))  in mmap_cache_rebuild_if_invalid()
152 			error_msg("%s: unrecognized file format", filename);  in mmap_cache_rebuild_if_invalid()
156 		struct mmap_cache_entry_t *entry;  in mmap_cache_rebuild_if_invalid()  local
159 		 * non-overlapping regions in ascending order  in mmap_cache_rebuild_if_invalid()
161 		if (cache.size > 0) {  in mmap_cache_rebuild_if_invalid()
162 			entry = &cache.entry[cache.size - 1];  in mmap_cache_rebuild_if_invalid()
163 			if (entry->start_addr == start_addr &&  in mmap_cache_rebuild_if_invalid()
164 			    entry->end_addr == end_addr) {  in mmap_cache_rebuild_if_invalid()
165 				/* duplicate entry, e.g. [vsyscall] */  in mmap_cache_rebuild_if_invalid()
168 			if (start_addr <= entry->start_addr ||  in mmap_cache_rebuild_if_invalid()
169 			    start_addr < entry->end_addr) {  in mmap_cache_rebuild_if_invalid()
171 					  "\"%s\" [%08lx-%08lx] overlaps with "  in mmap_cache_rebuild_if_invalid()
172 					  "\"%s\" [%08lx-%08lx]",  in mmap_cache_rebuild_if_invalid()
174 					  end_addr, entry->binary_filename,  in mmap_cache_rebuild_if_invalid()
175 					  entry->start_addr, entry->end_addr);  in mmap_cache_rebuild_if_invalid()
180 		if (cache.size >= allocated)  in mmap_cache_rebuild_if_invalid()
181 			cache.entry = xgrowarray(cache.entry, &allocated,  in mmap_cache_rebuild_if_invalid()
182 						 sizeof(*cache.entry));  in mmap_cache_rebuild_if_invalid()
184 		entry = &cache.entry[cache.size];  in mmap_cache_rebuild_if_invalid()
185 		entry->start_addr = start_addr;  in mmap_cache_rebuild_if_invalid()
186 		entry->end_addr = end_addr;  in mmap_cache_rebuild_if_invalid()
187 		entry->mmap_offset = mmap_offset;  in mmap_cache_rebuild_if_invalid()
188 		entry->protections = (  in mmap_cache_rebuild_if_invalid()
195 		entry->major = major;  in mmap_cache_rebuild_if_invalid()
196 		entry->minor = minor;  in mmap_cache_rebuild_if_invalid()
197 		entry->binary_filename = xstrdup(binary_path);  in mmap_cache_rebuild_if_invalid()
198 		cache.size++;  in mmap_cache_rebuild_if_invalid()
202 	if (!cache.size)  in mmap_cache_rebuild_if_invalid()
205 	tcp->mmap_cache = xmalloc(sizeof(*tcp->mmap_cache));  in mmap_cache_rebuild_if_invalid()
206 	memcpy(tcp->mmap_cache, &cache, sizeof(cache));  in mmap_cache_rebuild_if_invalid()
208 	debug_func_msg("tgen=%u, ggen=%u, tcp=%p, cache=%p, caller=%s",  in mmap_cache_rebuild_if_invalid()
209 		       tcp->mmap_cache->generation, mmap_cache_generation,  in mmap_cache_rebuild_if_invalid()
210 		       tcp, tcp->mmap_cache->entry, caller);  in mmap_cache_rebuild_if_invalid()
218 	if (!tcp->mmap_cache)  in mmap_cache_search()
222 	int upper = (int) tcp->mmap_cache->size - 1;  in mmap_cache_search()
226 		struct mmap_cache_entry_t *entry = &tcp->mmap_cache->entry[mid];  in mmap_cache_search()  local
228 		if (ip >= entry->start_addr &&  in mmap_cache_search()
229 		    ip < entry->end_addr)  in mmap_cache_search()
230 			return entry;  in mmap_cache_search()
231 		else if (ip < entry->start_addr)  in mmap_cache_search()
232 			upper = mid - 1;  in mmap_cache_search()
242 	for (unsigned int i = 0; i < tcp->mmap_cache->size; i++) {  in mmap_cache_search_custom()
243 		if (fn(tcp->mmap_cache->entry + i, data))  in mmap_cache_search_custom()
244 			return tcp->mmap_cache->entry + i;  in mmap_cache_search_custom()