1 /*--------------------------------------------------------------------*/ 2 /*--- Callgrind ---*/ 3 /*--- ct_fn.c ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Callgrind, a Valgrind tool for call tracing. 8 9 Copyright (C) 2002-2012, Josef Weidendorfer (Josef.Weidendorfer (at) gmx.de) 10 11 This program is free software; you can redistribute it and/or 12 modify it under the terms of the GNU General Public License as 13 published by the Free Software Foundation; either version 2 of the 14 License, or (at your option) any later version. 15 16 This program is distributed in the hope that it will be useful, but 17 WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software 23 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 24 02111-1307, USA. 25 26 The GNU General Public License is contained in the file COPYING. 27 */ 28 29 #include "global.h" 30 31 #define N_INITIAL_FN_ARRAY_SIZE 10071 32 33 static fn_array current_fn_active; 34 35 static Addr runtime_resolve_addr = 0; 36 static int runtime_resolve_length = 0; 37 38 // a code pattern is a list of tuples (start offset, length) 39 struct chunk_t { int start, len; }; 40 struct pattern 41 { 42 const char* name; 43 int len; 44 struct chunk_t chunk[]; 45 }; 46 47 /* Scan for a pattern in the code of an ELF object. 48 * If found, return true and set runtime_resolve_{addr,length} 49 */ 50 __attribute__((unused)) // Possibly; depends on the platform. 51 static Bool check_code(obj_node* obj, 52 unsigned char code[], struct pattern* pat) 53 { 54 Bool found; 55 Addr addr, end; 56 int chunk, start, len; 57 58 /* first chunk of pattern should always start at offset 0 and 59 * have at least 3 bytes */ 60 CLG_ASSERT((pat->chunk[0].start == 0) && (pat->chunk[0].len >2)); 61 62 CLG_DEBUG(1, "check_code: %s, pattern %s, check %d bytes of [%x %x %x...]\n", 63 obj->name, pat->name, pat->chunk[0].len, code[0], code[1], code[2]); 64 65 end = obj->start + obj->size - pat->len; 66 addr = obj->start; 67 while(addr < end) { 68 found = (VG_(memcmp)( (void*)addr, code, pat->chunk[0].len) == 0); 69 70 if (found) { 71 chunk = 1; 72 while(1) { 73 start = pat->chunk[chunk].start; 74 len = pat->chunk[chunk].len; 75 if (len == 0) break; 76 77 CLG_ASSERT(len >2); 78 CLG_DEBUG(1, " found chunk %d at %#lx, checking %d bytes " 79 "of [%x %x %x...]\n", 80 chunk-1, addr - obj->start, len, 81 code[start], code[start+1], code[start+2]); 82 83 if (VG_(memcmp)( (void*)(addr+start), code+start, len) != 0) { 84 found = False; 85 break; 86 } 87 chunk++; 88 } 89 90 if (found) { 91 CLG_DEBUG(1, "found at offset %#lx.\n", addr - obj->start); 92 if (VG_(clo_verbosity) > 1) 93 VG_(message)(Vg_DebugMsg, "Found runtime_resolve (%s): " 94 "%s +%#lx=%#lx, length %d\n", 95 pat->name, obj->name + obj->last_slash_pos, 96 addr - obj->start, addr, pat->len); 97 98 runtime_resolve_addr = addr; 99 runtime_resolve_length = pat->len; 100 return True; 101 } 102 } 103 addr++; 104 } 105 CLG_DEBUG(1, " found nothing.\n"); 106 return False; 107 } 108 109 110 /* _ld_runtime_resolve, located in ld.so, needs special handling: 111 * The jump at end into the resolved function should not be 112 * represented as a call (as usually done in callgrind with jumps), 113 * but as a return + call. Otherwise, the repeated existance of 114 * _ld_runtime_resolve in call chains will lead to huge cycles, 115 * making the profile almost worthless. 116 * 117 * If ld.so is stripped, the symbol will not appear. But as this 118 * function is handcrafted assembler, we search for it. 119 * 120 * We stop if the ELF object name does not seem to be the runtime linker 121 */ 122 static Bool search_runtime_resolve(obj_node* obj) 123 { 124 #if defined(VGP_x86_linux) 125 static unsigned char code[] = { 126 /* 0*/ 0x50, 0x51, 0x52, 0x8b, 0x54, 0x24, 0x10, 0x8b, 127 /* 8*/ 0x44, 0x24, 0x0c, 0xe8, 0x70, 0x01, 0x00, 0x00, 128 /*16*/ 0x5a, 0x59, 0x87, 0x04, 0x24, 0xc2, 0x08, 0x00 }; 129 /* Check ranges [0-11] and [16-23] ([12-15] is an absolute address) */ 130 static struct pattern pat = { 131 "x86-def", 24, {{ 0,12 }, { 16,8 }, { 24,0}} }; 132 133 /* Pattern for glibc-2.8 on OpenSuse11.0 */ 134 static unsigned char code_28[] = { 135 /* 0*/ 0x50, 0x51, 0x52, 0x8b, 0x54, 0x24, 0x10, 0x8b, 136 /* 8*/ 0x44, 0x24, 0x0c, 0xe8, 0x70, 0x01, 0x00, 0x00, 137 /*16*/ 0x5a, 0x8b, 0x0c, 0x24, 0x89, 0x04, 0x24, 0x8b, 138 /*24*/ 0x44, 0x24, 0x04, 0xc2, 0x0c, 0x00 }; 139 static struct pattern pat_28 = { 140 "x86-glibc2.8", 30, {{ 0,12 }, { 16,14 }, { 30,0}} }; 141 142 if (VG_(strncmp)(obj->name, "/lib/ld", 7) != 0) return False; 143 if (check_code(obj, code, &pat)) return True; 144 if (check_code(obj, code_28, &pat_28)) return True; 145 return False; 146 #endif 147 148 #if defined(VGP_ppc32_linux) 149 static unsigned char code[] = { 150 /* 0*/ 0x94, 0x21, 0xff, 0xc0, 0x90, 0x01, 0x00, 0x0c, 151 /* 8*/ 0x90, 0x61, 0x00, 0x10, 0x90, 0x81, 0x00, 0x14, 152 /*16*/ 0x7d, 0x83, 0x63, 0x78, 0x90, 0xa1, 0x00, 0x18, 153 /*24*/ 0x7d, 0x64, 0x5b, 0x78, 0x90, 0xc1, 0x00, 0x1c, 154 /*32*/ 0x7c, 0x08, 0x02, 0xa6, 0x90, 0xe1, 0x00, 0x20, 155 /*40*/ 0x90, 0x01, 0x00, 0x30, 0x91, 0x01, 0x00, 0x24, 156 /*48*/ 0x7c, 0x00, 0x00, 0x26, 0x91, 0x21, 0x00, 0x28, 157 /*56*/ 0x91, 0x41, 0x00, 0x2c, 0x90, 0x01, 0x00, 0x08, 158 /*64*/ 0x48, 0x00, 0x02, 0x91, 0x7c, 0x69, 0x03, 0xa6, /* at 64: bl aff0 <fixup> */ 159 /*72*/ 0x80, 0x01, 0x00, 0x30, 0x81, 0x41, 0x00, 0x2c, 160 /*80*/ 0x81, 0x21, 0x00, 0x28, 0x7c, 0x08, 0x03, 0xa6, 161 /*88*/ 0x81, 0x01, 0x00, 0x24, 0x80, 0x01, 0x00, 0x08, 162 /*96*/ 0x80, 0xe1, 0x00, 0x20, 0x80, 0xc1, 0x00, 0x1c, 163 /*104*/0x7c, 0x0f, 0xf1, 0x20, 0x80, 0xa1, 0x00, 0x18, 164 /*112*/0x80, 0x81, 0x00, 0x14, 0x80, 0x61, 0x00, 0x10, 165 /*120*/0x80, 0x01, 0x00, 0x0c, 0x38, 0x21, 0x00, 0x40, 166 /*128*/0x4e, 0x80, 0x04, 0x20 }; 167 static struct pattern pat = { 168 "ppc32-def", 132, {{ 0,65 }, { 68,64 }, { 132,0 }} }; 169 170 if (VG_(strncmp)(obj->name, "/lib/ld", 7) != 0) return False; 171 return check_code(obj, code, &pat); 172 #endif 173 174 #if defined(VGP_amd64_linux) 175 static unsigned char code[] = { 176 /* 0*/ 0x48, 0x83, 0xec, 0x38, 0x48, 0x89, 0x04, 0x24, 177 /* 8*/ 0x48, 0x89, 0x4c, 0x24, 0x08, 0x48, 0x89, 0x54, 0x24, 0x10, 178 /*18*/ 0x48, 0x89, 0x74, 0x24, 0x18, 0x48, 0x89, 0x7c, 0x24, 0x20, 179 /*28*/ 0x4c, 0x89, 0x44, 0x24, 0x28, 0x4c, 0x89, 0x4c, 0x24, 0x30, 180 /*38*/ 0x48, 0x8b, 0x74, 0x24, 0x40, 0x49, 0x89, 0xf3, 181 /*46*/ 0x4c, 0x01, 0xde, 0x4c, 0x01, 0xde, 0x48, 0xc1, 0xe6, 0x03, 182 /*56*/ 0x48, 0x8b, 0x7c, 0x24, 0x38, 0xe8, 0xee, 0x01, 0x00, 0x00, 183 /*66*/ 0x49, 0x89, 0xc3, 0x4c, 0x8b, 0x4c, 0x24, 0x30, 184 /*74*/ 0x4c, 0x8b, 0x44, 0x24, 0x28, 0x48, 0x8b, 0x7c, 0x24, 0x20, 185 /*84*/ 0x48, 0x8b, 0x74, 0x24, 0x18, 0x48, 0x8b, 0x54, 0x24, 0x10, 186 /*94*/ 0x48, 0x8b, 0x4c, 0x24, 0x08, 0x48, 0x8b, 0x04, 0x24, 187 /*103*/0x48, 0x83, 0xc4, 0x48, 0x41, 0xff, 0xe3 }; 188 static struct pattern pat = { 189 "amd64-def", 110, {{ 0,62 }, { 66,44 }, { 110,0 }} }; 190 191 if ((VG_(strncmp)(obj->name, "/lib/ld", 7) != 0) && 192 (VG_(strncmp)(obj->name, "/lib64/ld", 9) != 0)) return False; 193 return check_code(obj, code, &pat); 194 #endif 195 196 /* For other platforms, no patterns known */ 197 return False; 198 } 199 200 201 /*------------------------------------------------------------*/ 202 /*--- Object/File/Function hash entry operations ---*/ 203 /*------------------------------------------------------------*/ 204 205 /* Object hash table, fixed */ 206 static obj_node* obj_table[N_OBJ_ENTRIES]; 207 208 void CLG_(init_obj_table)() 209 { 210 Int i; 211 for (i = 0; i < N_OBJ_ENTRIES; i++) 212 obj_table[i] = 0; 213 } 214 215 #define HASH_CONSTANT 256 216 217 static UInt str_hash(const Char *s, UInt table_size) 218 { 219 int hash_value = 0; 220 for ( ; *s; s++) 221 hash_value = (HASH_CONSTANT * hash_value + *s) % table_size; 222 return hash_value; 223 } 224 225 226 static Char* anonymous_obj = "???"; 227 228 static __inline__ 229 obj_node* new_obj_node(DebugInfo* di, obj_node* next) 230 { 231 Int i; 232 obj_node* obj; 233 234 obj = (obj_node*) CLG_MALLOC("cl.fn.non.1", sizeof(obj_node)); 235 obj->name = di ? VG_(strdup)( "cl.fn.non.2", 236 VG_(DebugInfo_get_filename)(di) ) 237 : anonymous_obj; 238 for (i = 0; i < N_FILE_ENTRIES; i++) { 239 obj->files[i] = NULL; 240 } 241 CLG_(stat).distinct_objs ++; 242 obj->number = CLG_(stat).distinct_objs; 243 /* JRS 2008 Feb 19: maybe rename .start/.size/.offset to 244 .text_avma/.text_size/.test_bias to make it clearer what these 245 fields really mean */ 246 obj->start = di ? VG_(DebugInfo_get_text_avma)(di) : 0; 247 obj->size = di ? VG_(DebugInfo_get_text_size)(di) : 0; 248 obj->offset = di ? VG_(DebugInfo_get_text_bias)(di) : 0; 249 obj->next = next; 250 251 // not only used for debug output (see static.c) 252 obj->last_slash_pos = 0; 253 i = 0; 254 while(obj->name[i]) { 255 if (obj->name[i]=='/') obj->last_slash_pos = i+1; 256 i++; 257 } 258 259 if (runtime_resolve_addr == 0) search_runtime_resolve(obj); 260 261 return obj; 262 } 263 264 obj_node* CLG_(get_obj_node)(DebugInfo* di) 265 { 266 obj_node* curr_obj_node; 267 UInt objname_hash; 268 const UChar* obj_name; 269 270 obj_name = di ? (Char*) VG_(DebugInfo_get_filename)(di) : anonymous_obj; 271 272 /* lookup in obj hash */ 273 objname_hash = str_hash(obj_name, N_OBJ_ENTRIES); 274 curr_obj_node = obj_table[objname_hash]; 275 while (NULL != curr_obj_node && 276 VG_(strcmp)(obj_name, curr_obj_node->name) != 0) { 277 curr_obj_node = curr_obj_node->next; 278 } 279 if (NULL == curr_obj_node) { 280 obj_table[objname_hash] = curr_obj_node = 281 new_obj_node(di, obj_table[objname_hash]); 282 } 283 284 return curr_obj_node; 285 } 286 287 288 static __inline__ 289 file_node* new_file_node(Char filename[FILENAME_LEN], 290 obj_node* obj, file_node* next) 291 { 292 Int i; 293 file_node* file = (file_node*) CLG_MALLOC("cl.fn.nfn.1", 294 sizeof(file_node)); 295 file->name = VG_(strdup)("cl.fn.nfn.2", filename); 296 for (i = 0; i < N_FN_ENTRIES; i++) { 297 file->fns[i] = NULL; 298 } 299 CLG_(stat).distinct_files++; 300 file->number = CLG_(stat).distinct_files; 301 file->obj = obj; 302 file->next = next; 303 return file; 304 } 305 306 307 file_node* CLG_(get_file_node)(obj_node* curr_obj_node, 308 Char filename[FILENAME_LEN]) 309 { 310 file_node* curr_file_node; 311 UInt filename_hash; 312 313 /* lookup in file hash */ 314 filename_hash = str_hash(filename, N_FILE_ENTRIES); 315 curr_file_node = curr_obj_node->files[filename_hash]; 316 while (NULL != curr_file_node && 317 VG_(strcmp)(filename, curr_file_node->name) != 0) { 318 curr_file_node = curr_file_node->next; 319 } 320 if (NULL == curr_file_node) { 321 curr_obj_node->files[filename_hash] = curr_file_node = 322 new_file_node(filename, curr_obj_node, 323 curr_obj_node->files[filename_hash]); 324 } 325 326 return curr_file_node; 327 } 328 329 /* forward decl. */ 330 static void resize_fn_array(void); 331 332 static __inline__ 333 fn_node* new_fn_node(Char fnname[FILENAME_LEN], 334 file_node* file, fn_node* next) 335 { 336 fn_node* fn = (fn_node*) CLG_MALLOC("cl.fn.nfnnd.1", 337 sizeof(fn_node)); 338 fn->name = VG_(strdup)("cl.fn.nfnnd.2", fnname); 339 340 CLG_(stat).distinct_fns++; 341 fn->number = CLG_(stat).distinct_fns; 342 fn->last_cxt = 0; 343 fn->pure_cxt = 0; 344 fn->file = file; 345 fn->next = next; 346 347 fn->dump_before = False; 348 fn->dump_after = False; 349 fn->zero_before = False; 350 fn->toggle_collect = False; 351 fn->skip = False; 352 fn->pop_on_jump = CLG_(clo).pop_on_jump; 353 fn->is_malloc = False; 354 fn->is_realloc = False; 355 fn->is_free = False; 356 357 fn->group = 0; 358 fn->separate_callers = CLG_(clo).separate_callers; 359 fn->separate_recursions = CLG_(clo).separate_recursions; 360 361 #if CLG_ENABLE_DEBUG 362 fn->verbosity = -1; 363 #endif 364 365 if (CLG_(stat).distinct_fns >= current_fn_active.size) 366 resize_fn_array(); 367 368 return fn; 369 } 370 371 372 /* Get a function node in hash2 with known file node. 373 * hash nodes are created if needed 374 */ 375 static 376 fn_node* get_fn_node_infile(file_node* curr_file_node, 377 Char fnname[FN_NAME_LEN]) 378 { 379 fn_node* curr_fn_node; 380 UInt fnname_hash; 381 382 CLG_ASSERT(curr_file_node != 0); 383 384 /* lookup in function hash */ 385 fnname_hash = str_hash(fnname, N_FN_ENTRIES); 386 curr_fn_node = curr_file_node->fns[fnname_hash]; 387 while (NULL != curr_fn_node && 388 VG_(strcmp)(fnname, curr_fn_node->name) != 0) { 389 curr_fn_node = curr_fn_node->next; 390 } 391 if (NULL == curr_fn_node) { 392 curr_file_node->fns[fnname_hash] = curr_fn_node = 393 new_fn_node(fnname, curr_file_node, 394 curr_file_node->fns[fnname_hash]); 395 } 396 397 return curr_fn_node; 398 } 399 400 401 /* Get a function node in a Segment. 402 * Hash nodes are created if needed. 403 */ 404 static __inline__ 405 fn_node* get_fn_node_inseg(DebugInfo* di, 406 Char filename[FILENAME_LEN], 407 Char fnname[FN_NAME_LEN]) 408 { 409 obj_node *obj = CLG_(get_obj_node)(di); 410 file_node *file = CLG_(get_file_node)(obj, filename); 411 fn_node *fn = get_fn_node_infile(file, fnname); 412 413 return fn; 414 } 415 416 417 Bool CLG_(get_debug_info)(Addr instr_addr, 418 Char file[FILENAME_LEN], 419 Char fn_name[FN_NAME_LEN], UInt* line_num, 420 DebugInfo** pDebugInfo) 421 { 422 Bool found_file_line, found_fn, found_dirname, result = True; 423 Char dir[FILENAME_LEN]; 424 UInt line; 425 426 CLG_DEBUG(6, " + get_debug_info(%#lx)\n", instr_addr); 427 428 if (pDebugInfo) { 429 *pDebugInfo = VG_(find_DebugInfo)(instr_addr); 430 431 // for generated code in anonymous space, pSegInfo is 0 432 } 433 434 found_file_line = VG_(get_filename_linenum)(instr_addr, 435 file, FILENAME_LEN, 436 dir, FILENAME_LEN, 437 &found_dirname, 438 &line); 439 found_fn = VG_(get_fnname)(instr_addr, 440 fn_name, FN_NAME_LEN); 441 442 if (found_dirname) { 443 // +1 for the '/'. 444 CLG_ASSERT(VG_(strlen)(dir) + VG_(strlen)(file) + 1 < FILENAME_LEN); 445 VG_(strcat)(dir, "/"); // Append '/' 446 VG_(strcat)(dir, file); // Append file to dir 447 VG_(strcpy)(file, dir); // Move dir+file to file 448 } 449 450 if (!found_file_line && !found_fn) { 451 CLG_(stat).no_debug_BBs++; 452 VG_(strcpy)(file, "???"); 453 VG_(strcpy)(fn_name, "???"); 454 if (line_num) *line_num=0; 455 result = False; 456 457 } else if ( found_file_line && found_fn) { 458 CLG_(stat).full_debug_BBs++; 459 if (line_num) *line_num=line; 460 461 } else if ( found_file_line && !found_fn) { 462 CLG_(stat).file_line_debug_BBs++; 463 VG_(strcpy)(fn_name, "???"); 464 if (line_num) *line_num=line; 465 466 } else /*(!found_file_line && found_fn)*/ { 467 CLG_(stat).fn_name_debug_BBs++; 468 VG_(strcpy)(file, "???"); 469 if (line_num) *line_num=0; 470 } 471 472 CLG_DEBUG(6, " - get_debug_info(%#lx): seg '%s', fn %s\n", 473 instr_addr, 474 !pDebugInfo ? (const UChar*)"-" : 475 (*pDebugInfo) ? VG_(DebugInfo_get_filename)(*pDebugInfo) : 476 (const UChar*)"(None)", 477 fn_name); 478 479 return result; 480 } 481 482 /* for _libc_freeres_wrapper => _exit renaming */ 483 static BB* exit_bb = 0; 484 485 486 /* 487 * Attach function struct to a BB from debug info. 488 */ 489 fn_node* CLG_(get_fn_node)(BB* bb) 490 { 491 Char filename[FILENAME_LEN], fnname[FN_NAME_LEN]; 492 DebugInfo* di; 493 UInt line_num; 494 fn_node* fn; 495 496 /* fn from debug info is idempotent for a BB */ 497 if (bb->fn) return bb->fn; 498 499 CLG_DEBUG(3,"+ get_fn_node(BB %#lx)\n", bb_addr(bb)); 500 501 /* get function/file name, line number and object of 502 * the BB according to debug information 503 */ 504 CLG_(get_debug_info)(bb_addr(bb), 505 filename, fnname, &line_num, &di); 506 507 if (0 == VG_(strcmp)(fnname, "???")) { 508 int p; 509 510 /* Use address as found in library */ 511 if (sizeof(Addr) == 4) 512 p = VG_(sprintf)(fnname, "%#08lx", bb->offset); 513 else 514 // 64bit address 515 p = VG_(sprintf)(fnname, "%#016lx", bb->offset); 516 517 VG_(sprintf)(fnname+p, "%s", 518 (bb->sect_kind == Vg_SectData) ? " [Data]" : 519 (bb->sect_kind == Vg_SectBSS) ? " [BSS]" : 520 (bb->sect_kind == Vg_SectGOT) ? " [GOT]" : 521 (bb->sect_kind == Vg_SectPLT) ? " [PLT]" : ""); 522 } 523 else { 524 if (VG_(get_fnname_if_entry)(bb_addr(bb), fnname, FN_NAME_LEN)) 525 bb->is_entry = 1; 526 } 527 528 /* HACK for correct _exit: 529 * _exit is redirected to VG_(__libc_freeres_wrapper) by valgrind, 530 * so we rename it back again :-) 531 */ 532 if (0 == VG_(strcmp)(fnname, "vgPlain___libc_freeres_wrapper") 533 && exit_bb) { 534 CLG_(get_debug_info)(bb_addr(exit_bb), 535 filename, fnname, &line_num, &di); 536 537 CLG_DEBUG(1, "__libc_freeres_wrapper renamed to _exit\n"); 538 } 539 if (0 == VG_(strcmp)(fnname, "_exit") && !exit_bb) 540 exit_bb = bb; 541 542 if (runtime_resolve_addr && 543 (bb_addr(bb) >= runtime_resolve_addr) && 544 (bb_addr(bb) < runtime_resolve_addr + runtime_resolve_length)) { 545 /* BB in runtime_resolve found by code check; use this name */ 546 VG_(sprintf)(fnname, "_dl_runtime_resolve"); 547 } 548 549 /* get fn_node struct for this function */ 550 fn = get_fn_node_inseg( di, filename, fnname); 551 552 /* if this is the 1st time the function is seen, 553 * some attributes are set */ 554 if (fn->pure_cxt == 0) { 555 556 /* Every function gets a "pure" context, i.e. a context with stack 557 * depth 1 only with this function. This is for compression of mangled 558 * names 559 */ 560 fn_node* pure[2]; 561 pure[0] = 0; 562 pure[1] = fn; 563 fn->pure_cxt = CLG_(get_cxt)(pure+1); 564 565 if (bb->sect_kind == Vg_SectPLT) 566 fn->skip = CLG_(clo).skip_plt; 567 568 if (VG_(strcmp)(fn->name, "_dl_runtime_resolve")==0) { 569 fn->pop_on_jump = True; 570 571 if (VG_(clo_verbosity) > 1) 572 VG_(message)(Vg_DebugMsg, "Symbol match: found runtime_resolve:" 573 " %s +%#lx=%#lx\n", 574 bb->obj->name + bb->obj->last_slash_pos, 575 bb->offset, bb_addr(bb)); 576 } 577 578 fn->is_malloc = (VG_(strcmp)(fn->name, "malloc")==0); 579 fn->is_realloc = (VG_(strcmp)(fn->name, "realloc")==0); 580 fn->is_free = (VG_(strcmp)(fn->name, "free")==0); 581 582 /* apply config options from function name patterns 583 * given on command line */ 584 CLG_(update_fn_config)(fn); 585 } 586 587 588 bb->fn = fn; 589 bb->line = line_num; 590 591 CLG_DEBUG(3,"- get_fn_node(BB %#lx): %s (in %s:%u)\n", 592 bb_addr(bb), fnname, filename, line_num); 593 594 return fn; 595 } 596 597 598 /*------------------------------------------------------------*/ 599 /*--- Active function array operations ---*/ 600 /*------------------------------------------------------------*/ 601 602 /* The active function array is a thread-specific array 603 * of UInts, mapping function numbers to the active count of 604 * functions. 605 * The active count is the number of times a function appears 606 * in the current call stack, and is used when costs for recursion 607 * levels should be separated. 608 */ 609 610 UInt* CLG_(get_fn_entry)(Int n) 611 { 612 CLG_ASSERT(n < current_fn_active.size); 613 return current_fn_active.array + n; 614 } 615 616 void CLG_(init_fn_array)(fn_array* a) 617 { 618 Int i; 619 620 CLG_ASSERT(a != 0); 621 622 a->size = N_INITIAL_FN_ARRAY_SIZE; 623 if (a->size <= CLG_(stat).distinct_fns) 624 a->size = CLG_(stat).distinct_fns+1; 625 626 a->array = (UInt*) CLG_MALLOC("cl.fn.gfe.1", 627 a->size * sizeof(UInt)); 628 for(i=0;i<a->size;i++) 629 a->array[i] = 0; 630 } 631 632 void CLG_(copy_current_fn_array)(fn_array* dst) 633 { 634 CLG_ASSERT(dst != 0); 635 636 dst->size = current_fn_active.size; 637 dst->array = current_fn_active.array; 638 } 639 640 fn_array* CLG_(get_current_fn_array)() 641 { 642 return ¤t_fn_active; 643 } 644 645 void CLG_(set_current_fn_array)(fn_array* a) 646 { 647 CLG_ASSERT(a != 0); 648 649 current_fn_active.size = a->size; 650 current_fn_active.array = a->array; 651 if (current_fn_active.size <= CLG_(stat).distinct_fns) 652 resize_fn_array(); 653 } 654 655 /* ensure that active_array is big enough: 656 * <distinct_fns> is the highest index, so <fn_active_array_size> 657 * has to be bigger than that. 658 */ 659 static void resize_fn_array(void) 660 { 661 UInt* new_array; 662 Int i, newsize; 663 664 newsize = current_fn_active.size; 665 while (newsize <= CLG_(stat).distinct_fns) newsize *=2; 666 667 CLG_DEBUG(0, "Resize fn_active_array: %d => %d\n", 668 current_fn_active.size, newsize); 669 670 new_array = (UInt*) CLG_MALLOC("cl.fn.rfa.1", newsize * sizeof(UInt)); 671 for(i=0;i<current_fn_active.size;i++) 672 new_array[i] = current_fn_active.array[i]; 673 while(i<newsize) 674 new_array[i++] = 0; 675 676 VG_(free)(current_fn_active.array); 677 current_fn_active.size = newsize; 678 current_fn_active.array = new_array; 679 CLG_(stat).fn_array_resizes++; 680 } 681 682 683
