1 /* 2 * Copyright 2010, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "MCCacheWriter.h" 18 19 #include "DebugHelper.h" 20 #include "FileHandle.h" 21 #include "Script.h" 22 23 #include <map> 24 #include <string> 25 #include <vector> 26 #include <utility> 27 28 #include <stdint.h> 29 #include <stdlib.h> 30 #include <string.h> 31 32 using namespace std; 33 34 #if USE_MCJIT 35 namespace bcc { 36 37 MCCacheWriter::~MCCacheWriter() { 38 #define CHECK_AND_FREE(VAR) if (VAR) { free(VAR); } 39 40 CHECK_AND_FREE(mpHeaderSection); 41 CHECK_AND_FREE(mpStringPoolSection); 42 CHECK_AND_FREE(mpDependencyTableSection); 43 CHECK_AND_FREE(mpPragmaListSection); 44 CHECK_AND_FREE(mpObjectSlotSection); 45 CHECK_AND_FREE(mpExportVarNameListSection); 46 CHECK_AND_FREE(mpExportFuncNameListSection); 47 48 #undef CHECK_AND_FREE 49 } 50 51 bool MCCacheWriter::writeCacheFile(FileHandle *objFile, FileHandle *infoFile, 52 Script *S, uint32_t libRS_threadable) { 53 if (!objFile || objFile->getFD() < 0 || !infoFile || infoFile->getFD() < 0) { 54 return false; 55 } 56 57 mObjFile = objFile; 58 mInfoFile = infoFile; 59 mpOwner = S; 60 61 bool result = prepareHeader(libRS_threadable) 62 && prepareDependencyTable() 63 && preparePragmaList() 64 && prepareExportVarNameList() 65 && prepareExportFuncNameList() 66 && prepareStringPool() 67 && prepareObjectSlotList() 68 && calcSectionOffset() 69 && writeAll() 70 ; 71 72 return result; 73 } 74 75 76 bool MCCacheWriter::prepareHeader(uint32_t libRS_threadable) { 77 MCO_Header *header = (MCO_Header *)malloc(sizeof(MCO_Header)); 78 79 if (!header) { 80 LOGE("Unable to allocate for header.\n"); 81 return false; 82 } 83 84 mpHeaderSection = header; 85 86 // Initialize 87 memset(header, '\0', sizeof(MCO_Header)); 88 89 // Magic word and version 90 memcpy(header->magic, OBCC_MAGIC, 4); 91 memcpy(header->version, OBCC_VERSION, 4); 92 93 // Machine Integer Type 94 uint32_t number = 0x00000001; 95 header->endianness = (*reinterpret_cast<char *>(&number) == 1) ? 'e' : 'E'; 96 header->sizeof_off_t = sizeof(off_t); 97 header->sizeof_size_t = sizeof(size_t); 98 header->sizeof_ptr_t = sizeof(void *); 99 100 // libRS is threadable dirty hack 101 // TODO: This should be removed in the future 102 header->libRS_threadable = libRS_threadable; 103 104 return true; 105 } 106 107 108 bool MCCacheWriter::prepareDependencyTable() { 109 size_t tableSize = sizeof(OBCC_DependencyTable) + 110 sizeof(OBCC_Dependency) * mDependencies.size(); 111 112 OBCC_DependencyTable *tab = (OBCC_DependencyTable *)malloc(tableSize); 113 114 if (!tab) { 115 LOGE("Unable to allocate for dependency table section.\n"); 116 return false; 117 } 118 119 mpDependencyTableSection = tab; 120 mpHeaderSection->depend_tab_size = tableSize; 121 122 tab->count = mDependencies.size(); 123 124 size_t i = 0; 125 for (map<string, pair<uint32_t, unsigned char const *> >::iterator 126 I = mDependencies.begin(), E = mDependencies.end(); I != E; ++I, ++i) { 127 OBCC_Dependency *dep = &tab->table[i]; 128 129 dep->res_name_strp_index = addString(I->first.c_str(), I->first.size()); 130 dep->res_type = I->second.first; 131 memcpy(dep->sha1, I->second.second, 20); 132 } 133 134 return true; 135 } 136 137 bool MCCacheWriter::preparePragmaList() { 138 size_t pragmaCount = mpOwner->getPragmaCount(); 139 140 size_t listSize = sizeof(OBCC_PragmaList) + 141 sizeof(OBCC_Pragma) * pragmaCount; 142 143 OBCC_PragmaList *list = (OBCC_PragmaList *)malloc(listSize); 144 145 if (!list) { 146 LOGE("Unable to allocate for pragma list\n"); 147 return false; 148 } 149 150 mpPragmaListSection = list; 151 mpHeaderSection->pragma_list_size = listSize; 152 153 list->count = pragmaCount; 154 155 vector<char const *> keyList(pragmaCount); 156 vector<char const *> valueList(pragmaCount); 157 mpOwner->getPragmaList(pragmaCount, &*keyList.begin(), &*valueList.begin()); 158 159 for (size_t i = 0; i < pragmaCount; ++i) { 160 char const *key = keyList[i]; 161 char const *value = valueList[i]; 162 163 size_t keyLen = strlen(key); 164 size_t valueLen = strlen(value); 165 166 OBCC_Pragma *pragma = &list->list[i]; 167 pragma->key_strp_index = addString(key, keyLen); 168 pragma->value_strp_index = addString(value, valueLen); 169 } 170 171 return true; 172 } 173 174 bool MCCacheWriter::prepareStringPool() { 175 // Calculate string pool size 176 size_t size = sizeof(OBCC_StringPool) + 177 sizeof(OBCC_String) * mStringPool.size(); 178 179 off_t strOffset = size; 180 181 for (size_t i = 0; i < mStringPool.size(); ++i) { 182 size += mStringPool[i].second + 1; 183 } 184 185 // Create string pool 186 OBCC_StringPool *pool = (OBCC_StringPool *)malloc(size); 187 188 if (!pool) { 189 LOGE("Unable to allocate string pool.\n"); 190 return false; 191 } 192 193 mpStringPoolSection = pool; 194 mpHeaderSection->str_pool_size = size; 195 196 pool->count = mStringPool.size(); 197 198 char *strPtr = reinterpret_cast<char *>(pool) + strOffset; 199 200 for (size_t i = 0; i < mStringPool.size(); ++i) { 201 OBCC_String *str = &pool->list[i]; 202 203 str->length = mStringPool[i].second; 204 str->offset = strOffset; 205 memcpy(strPtr, mStringPool[i].first, str->length); 206 207 strPtr += str->length; 208 *strPtr++ = '\0'; 209 210 strOffset += str->length + 1; 211 } 212 213 return true; 214 } 215 216 217 bool MCCacheWriter::prepareExportVarNameList() { 218 size_t varCount = mpOwner->getExportVarCount(); 219 size_t listSize = sizeof(OBCC_String_Ptr) + sizeof(size_t) * varCount; 220 221 OBCC_String_Ptr *list = (OBCC_String_Ptr*)malloc(listSize); 222 223 if (!list) { 224 LOGE("Unable to allocate for export variable name list\n"); 225 return false; 226 } 227 228 mpExportVarNameListSection = list; 229 mpHeaderSection->export_var_name_list_size = listSize; 230 231 list->count = static_cast<size_t>(varCount); 232 233 mpOwner->getExportVarNameList(varNameList); 234 for (size_t i = 0; i < varCount; ++i) { 235 list->strp_indexs[i] = addString(varNameList[i].c_str(), varNameList[i].length()); 236 } 237 return true; 238 } 239 240 241 bool MCCacheWriter::prepareExportFuncNameList() { 242 size_t funcCount = mpOwner->getExportFuncCount(); 243 size_t listSize = sizeof(OBCC_String_Ptr) + sizeof(size_t) * funcCount; 244 245 OBCC_String_Ptr *list = (OBCC_String_Ptr*)malloc(listSize); 246 247 if (!list) { 248 LOGE("Unable to allocate for export function name list\n"); 249 return false; 250 } 251 252 mpExportFuncNameListSection = list; 253 mpHeaderSection->export_func_name_list_size = listSize; 254 255 list->count = static_cast<size_t>(funcCount); 256 257 mpOwner->getExportFuncNameList(funcNameList); 258 for (size_t i = 0; i < funcCount; ++i) { 259 list->strp_indexs[i] = addString(funcNameList[i].c_str(), funcNameList[i].length()); 260 } 261 return true; 262 } 263 264 265 bool MCCacheWriter::prepareObjectSlotList() { 266 size_t objectSlotCount = mpOwner->getObjectSlotCount(); 267 268 size_t listSize = sizeof(OBCC_ObjectSlotList) + 269 sizeof(uint32_t) * objectSlotCount; 270 271 OBCC_ObjectSlotList *list = (OBCC_ObjectSlotList *)malloc(listSize); 272 273 if (!list) { 274 LOGE("Unable to allocate for object slot list\n"); 275 return false; 276 } 277 278 mpObjectSlotSection = list; 279 mpHeaderSection->object_slot_list_size = listSize; 280 281 list->count = objectSlotCount; 282 283 mpOwner->getObjectSlotList(objectSlotCount, list->object_slot_list); 284 return true; 285 } 286 287 288 bool MCCacheWriter::calcSectionOffset() { 289 size_t offset = sizeof(MCO_Header); 290 291 #define OFFSET_INCREASE(NAME) \ 292 do { \ 293 /* Align to a word */ \ 294 size_t rem = offset % sizeof(int); \ 295 if (rem > 0) { \ 296 offset += sizeof(int) - rem; \ 297 } \ 298 \ 299 /* Save the offset and increase it */ \ 300 mpHeaderSection->NAME##_offset = offset; \ 301 offset += mpHeaderSection->NAME##_size; \ 302 } while (0) 303 304 OFFSET_INCREASE(str_pool); 305 OFFSET_INCREASE(depend_tab); 306 OFFSET_INCREASE(pragma_list); 307 OFFSET_INCREASE(func_table); 308 OFFSET_INCREASE(object_slot_list); 309 OFFSET_INCREASE(export_var_name_list); 310 OFFSET_INCREASE(export_func_name_list); 311 312 #undef OFFSET_INCREASE 313 314 return true; 315 } 316 317 318 bool MCCacheWriter::writeAll() { 319 #define WRITE_SECTION(NAME, OFFSET, SIZE, SECTION) \ 320 do { \ 321 if (mInfoFile->seek(OFFSET, SEEK_SET) == -1) { \ 322 LOGE("Unable to seek to " #NAME " section for writing.\n"); \ 323 return false; \ 324 } \ 325 \ 326 if (mInfoFile->write(reinterpret_cast<char *>(SECTION), (SIZE)) != \ 327 static_cast<ssize_t>(SIZE)) { \ 328 LOGE("Unable to write " #NAME " section to cache file.\n"); \ 329 return false; \ 330 } \ 331 } while (0) 332 333 #define WRITE_SECTION_SIMPLE(NAME, SECTION) \ 334 WRITE_SECTION(NAME, \ 335 mpHeaderSection->NAME##_offset, \ 336 mpHeaderSection->NAME##_size, \ 337 SECTION) 338 339 WRITE_SECTION(header, 0, sizeof(MCO_Header), mpHeaderSection); 340 341 WRITE_SECTION_SIMPLE(str_pool, mpStringPoolSection); 342 WRITE_SECTION_SIMPLE(depend_tab, mpDependencyTableSection); 343 WRITE_SECTION_SIMPLE(pragma_list, mpPragmaListSection); 344 WRITE_SECTION_SIMPLE(object_slot_list, mpObjectSlotSection); 345 346 WRITE_SECTION_SIMPLE(export_var_name_list, mpExportVarNameListSection); 347 WRITE_SECTION_SIMPLE(export_func_name_list, mpExportFuncNameListSection); 348 349 #undef WRITE_SECTION_SIMPLE 350 #undef WRITE_SECTION 351 352 if (static_cast<size_t>(mObjFile->write(mpOwner->getELF(), 353 mpOwner->getELFSize())) 354 != mpOwner->getELFSize()) { 355 LOGE("Unable to write ELF to cache file.\n"); 356 return false; 357 } 358 359 return true; 360 } 361 362 } // namespace bcc 363 #endif 364
