Mercurial > hg > truffle
annotate agent/src/os/bsd/ps_core.c @ 8750:39432a1cefdd
8003348: SA can not read core file on OS
Summary: Macosx uses Mach-O file format for binary files, not ELF format. Currently SA works on core files on other platforms, t his change enables SA work on core file generated on Darwin.
Reviewed-by: sla, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Thu, 14 Mar 2013 00:33:08 -0700 |
| parents | da91efe96a93 |
| children | f6a055fcf47d |
| rev | line source |
|---|---|
| 3960 | 1 /* |
| 8750 | 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| 3960 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include <jni.h> | |
| 26 #include <unistd.h> | |
| 27 #include <fcntl.h> | |
| 28 #include <string.h> | |
| 29 #include <stdlib.h> | |
| 30 #include <stddef.h> | |
| 31 #include "libproc_impl.h" | |
| 8750 | 32 |
| 33 #ifdef __APPLE__ | |
| 34 #include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h" | |
| 35 #endif | |
| 3960 | 36 |
| 37 // This file has the libproc implementation to read core files. | |
| 38 // For live processes, refer to ps_proc.c. Portions of this is adapted | |
| 39 // /modelled after Solaris libproc.so (in particular Pcore.c) | |
| 40 | |
| 41 //---------------------------------------------------------------------- | |
| 42 // ps_prochandle cleanup helper functions | |
| 43 | |
| 44 // close all file descriptors | |
| 8750 | 45 static void close_files(struct ps_prochandle* ph) { |
| 46 lib_info* lib = NULL; | |
| 47 // close core file descriptor | |
| 48 if (ph->core->core_fd >= 0) | |
| 49 close(ph->core->core_fd); | |
| 3960 | 50 |
| 8750 | 51 // close exec file descriptor |
| 52 if (ph->core->exec_fd >= 0) | |
| 53 close(ph->core->exec_fd); | |
| 3960 | 54 |
| 8750 | 55 // close interp file descriptor |
| 56 if (ph->core->interp_fd >= 0) | |
| 57 close(ph->core->interp_fd); | |
| 3960 | 58 |
| 8750 | 59 // close class share archive file |
| 60 if (ph->core->classes_jsa_fd >= 0) | |
| 61 close(ph->core->classes_jsa_fd); | |
| 3960 | 62 |
| 8750 | 63 // close all library file descriptors |
| 64 lib = ph->libs; | |
| 65 while (lib) { | |
| 66 int fd = lib->fd; | |
| 67 if (fd >= 0 && fd != ph->core->exec_fd) { | |
| 68 close(fd); | |
| 69 } | |
| 70 lib = lib->next; | |
| 71 } | |
| 3960 | 72 } |
| 73 | |
| 74 // clean all map_info stuff | |
| 75 static void destroy_map_info(struct ps_prochandle* ph) { | |
| 76 map_info* map = ph->core->maps; | |
| 77 while (map) { | |
| 8750 | 78 map_info* next = map->next; |
| 79 free(map); | |
| 80 map = next; | |
| 3960 | 81 } |
| 82 | |
| 83 if (ph->core->map_array) { | |
| 8750 | 84 free(ph->core->map_array); |
| 3960 | 85 } |
| 86 | |
| 87 // Part of the class sharing workaround | |
| 88 map = ph->core->class_share_maps; | |
| 89 while (map) { | |
| 8750 | 90 map_info* next = map->next; |
| 91 free(map); | |
| 92 map = next; | |
| 3960 | 93 } |
| 94 } | |
| 95 | |
| 96 // ps_prochandle operations | |
| 97 static void core_release(struct ps_prochandle* ph) { | |
| 8750 | 98 if (ph->core) { |
| 99 close_files(ph); | |
| 100 destroy_map_info(ph); | |
| 101 free(ph->core); | |
| 102 } | |
| 3960 | 103 } |
| 104 | |
| 105 static map_info* allocate_init_map(int fd, off_t offset, uintptr_t vaddr, size_t memsz) { | |
| 8750 | 106 map_info* map; |
| 107 if ( (map = (map_info*) calloc(1, sizeof(map_info))) == NULL) { | |
| 108 print_debug("can't allocate memory for map_info\n"); | |
| 109 return NULL; | |
| 110 } | |
| 3960 | 111 |
| 8750 | 112 // initialize map |
| 113 map->fd = fd; | |
| 114 map->offset = offset; | |
| 115 map->vaddr = vaddr; | |
| 116 map->memsz = memsz; | |
| 117 return map; | |
| 3960 | 118 } |
| 119 | |
| 120 // add map info with given fd, offset, vaddr and memsz | |
| 121 static map_info* add_map_info(struct ps_prochandle* ph, int fd, off_t offset, | |
| 122 uintptr_t vaddr, size_t memsz) { | |
| 8750 | 123 map_info* map; |
| 124 if ((map = allocate_init_map(fd, offset, vaddr, memsz)) == NULL) { | |
| 125 return NULL; | |
| 126 } | |
| 3960 | 127 |
| 8750 | 128 // add this to map list |
| 129 map->next = ph->core->maps; | |
| 130 ph->core->maps = map; | |
| 131 ph->core->num_maps++; | |
| 3960 | 132 |
| 8750 | 133 return map; |
| 3960 | 134 } |
| 135 | |
| 136 // Part of the class sharing workaround | |
| 137 static map_info* add_class_share_map_info(struct ps_prochandle* ph, off_t offset, | |
| 138 uintptr_t vaddr, size_t memsz) { | |
| 8750 | 139 map_info* map; |
| 140 if ((map = allocate_init_map(ph->core->classes_jsa_fd, | |
| 141 offset, vaddr, memsz)) == NULL) { | |
| 142 return NULL; | |
| 143 } | |
| 3960 | 144 |
| 8750 | 145 map->next = ph->core->class_share_maps; |
| 146 ph->core->class_share_maps = map; | |
| 147 return map; | |
| 3960 | 148 } |
| 149 | |
| 150 // Return the map_info for the given virtual address. We keep a sorted | |
| 151 // array of pointers in ph->map_array, so we can binary search. | |
| 152 static map_info* core_lookup(struct ps_prochandle *ph, uintptr_t addr) | |
| 153 { | |
| 8750 | 154 int mid, lo = 0, hi = ph->core->num_maps - 1; |
| 155 map_info *mp; | |
| 3960 | 156 |
| 8750 | 157 while (hi - lo > 1) { |
| 158 mid = (lo + hi) / 2; | |
| 159 if (addr >= ph->core->map_array[mid]->vaddr) { | |
| 160 lo = mid; | |
| 161 } else { | |
| 162 hi = mid; | |
| 163 } | |
| 164 } | |
| 3960 | 165 |
| 8750 | 166 if (addr < ph->core->map_array[hi]->vaddr) { |
| 167 mp = ph->core->map_array[lo]; | |
| 168 } else { | |
| 169 mp = ph->core->map_array[hi]; | |
| 170 } | |
| 3960 | 171 |
| 8750 | 172 if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz) { |
| 173 return (mp); | |
| 174 } | |
| 3960 | 175 |
| 176 | |
| 8750 | 177 // Part of the class sharing workaround |
| 178 // Unfortunately, we have no way of detecting -Xshare state. | |
| 179 // Check out the share maps atlast, if we don't find anywhere. | |
| 180 // This is done this way so to avoid reading share pages | |
| 181 // ahead of other normal maps. For eg. with -Xshare:off we don't | |
| 182 // want to prefer class sharing data to data from core. | |
| 183 mp = ph->core->class_share_maps; | |
| 184 if (mp) { | |
| 185 print_debug("can't locate map_info at 0x%lx, trying class share maps\n", addr); | |
| 186 } | |
| 187 while (mp) { | |
| 188 if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz) { | |
| 189 print_debug("located map_info at 0x%lx from class share maps\n", addr); | |
| 190 return (mp); | |
| 191 } | |
| 192 mp = mp->next; | |
| 193 } | |
| 3960 | 194 |
| 8750 | 195 print_debug("can't locate map_info at 0x%lx\n", addr); |
| 196 return (NULL); | |
| 3960 | 197 } |
| 198 | |
| 199 //--------------------------------------------------------------- | |
| 200 // Part of the class sharing workaround: | |
| 201 // | |
| 202 // With class sharing, pages are mapped from classes[_g].jsa file. | |
| 203 // The read-only class sharing pages are mapped as MAP_SHARED, | |
| 204 // PROT_READ pages. These pages are not dumped into core dump. | |
| 205 // With this workaround, these pages are read from classes[_g].jsa. | |
| 206 | |
| 207 // FIXME: !HACK ALERT! | |
| 208 // The format of sharing achive file header is needed to read shared heap | |
| 209 // file mappings. For now, I am hard coding portion of FileMapHeader here. | |
| 210 // Refer to filemap.hpp. | |
| 211 | |
| 212 // FileMapHeader describes the shared space data in the file to be | |
| 213 // mapped. This structure gets written to a file. It is not a class, | |
| 214 // so that the compilers don't add any compiler-private data to it. | |
| 215 | |
| 216 #define NUM_SHARED_MAPS 4 | |
| 217 | |
| 218 // Refer to FileMapInfo::_current_version in filemap.hpp | |
| 219 #define CURRENT_ARCHIVE_VERSION 1 | |
| 220 | |
| 221 struct FileMapHeader { | |
| 222 int _magic; // identify file type. | |
| 223 int _version; // (from enum, above.) | |
| 224 size_t _alignment; // how shared archive should be aligned | |
| 225 | |
| 226 struct space_info { | |
| 227 int _file_offset; // sizeof(this) rounded to vm page size | |
| 228 char* _base; // copy-on-write base address | |
| 229 size_t _capacity; // for validity checking | |
| 230 size_t _used; // for setting space top on read | |
| 231 | |
| 232 // 4991491 NOTICE These are C++ bool's in filemap.hpp and must match up with | |
| 233 // the C type matching the C++ bool type on any given platform. For | |
| 234 // Hotspot on BSD we assume the corresponding C type is char but | |
| 235 // licensees on BSD versions may need to adjust the type of these fields. | |
| 236 char _read_only; // read only space? | |
| 237 char _allow_exec; // executable code in space? | |
| 238 | |
|
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239 } _space[NUM_SHARED_MAPS]; |
| 3960 | 240 |
| 241 // Ignore the rest of the FileMapHeader. We don't need those fields here. | |
| 242 }; | |
| 243 | |
| 244 static bool read_jboolean(struct ps_prochandle* ph, uintptr_t addr, jboolean* pvalue) { | |
| 8750 | 245 jboolean i; |
| 246 if (ps_pread(ph, (psaddr_t) addr, &i, sizeof(i)) == PS_OK) { | |
| 247 *pvalue = i; | |
| 248 return true; | |
| 249 } else { | |
| 250 return false; | |
| 251 } | |
| 3960 | 252 } |
| 253 | |
| 254 static bool read_pointer(struct ps_prochandle* ph, uintptr_t addr, uintptr_t* pvalue) { | |
| 8750 | 255 uintptr_t uip; |
| 256 if (ps_pread(ph, (psaddr_t) addr, (char *)&uip, sizeof(uip)) == PS_OK) { | |
| 257 *pvalue = uip; | |
| 258 return true; | |
| 259 } else { | |
| 260 return false; | |
| 261 } | |
| 3960 | 262 } |
| 263 | |
| 264 // used to read strings from debuggee | |
| 265 static bool read_string(struct ps_prochandle* ph, uintptr_t addr, char* buf, size_t size) { | |
| 8750 | 266 size_t i = 0; |
| 267 char c = ' '; | |
| 3960 | 268 |
| 8750 | 269 while (c != '\0') { |
| 270 if (ps_pread(ph, (psaddr_t) addr, &c, sizeof(char)) != PS_OK) { | |
| 271 return false; | |
| 272 } | |
| 273 if (i < size - 1) { | |
| 274 buf[i] = c; | |
| 275 } else { | |
| 276 // smaller buffer | |
| 277 return false; | |
| 278 } | |
| 279 i++; addr++; | |
| 280 } | |
| 281 buf[i] = '\0'; | |
| 282 return true; | |
| 3960 | 283 } |
| 284 | |
| 8750 | 285 #ifdef __APPLE__ |
| 286 #define USE_SHARED_SPACES_SYM "_UseSharedSpaces" | |
| 287 // mangled name of Arguments::SharedArchivePath | |
| 288 #define SHARED_ARCHIVE_PATH_SYM "_ZN9Arguments17SharedArchivePathE" | |
| 289 #else | |
| 3960 | 290 #define USE_SHARED_SPACES_SYM "UseSharedSpaces" |
| 291 // mangled name of Arguments::SharedArchivePath | |
| 8750 | 292 #define SHARED_ARCHIVE_PATH_SYM "__ZN9Arguments17SharedArchivePathE" |
| 293 #endif // __APPLE_ | |
| 3960 | 294 |
| 295 static bool init_classsharing_workaround(struct ps_prochandle* ph) { | |
| 8750 | 296 int m; |
| 297 size_t n; | |
| 298 lib_info* lib = ph->libs; | |
| 299 while (lib != NULL) { | |
| 300 // we are iterating over shared objects from the core dump. look for | |
| 301 // libjvm[_g].so. | |
| 302 const char *jvm_name = 0; | |
| 303 #ifdef __APPLE__ | |
| 304 if ((jvm_name = strstr(lib->name, "/libjvm.dylib")) != 0 || | |
| 305 (jvm_name = strstr(lib->name, "/libjvm_g.dylib")) != 0) | |
| 306 #else | |
| 307 if ((jvm_name = strstr(lib->name, "/libjvm.so")) != 0 || | |
| 308 (jvm_name = strstr(lib->name, "/libjvm_g.so")) != 0) | |
| 309 #endif // __APPLE__ | |
| 310 { | |
| 311 char classes_jsa[PATH_MAX]; | |
| 312 struct FileMapHeader header; | |
| 313 int fd = -1; | |
| 314 uintptr_t base = 0, useSharedSpacesAddr = 0; | |
| 315 uintptr_t sharedArchivePathAddrAddr = 0, sharedArchivePathAddr = 0; | |
| 316 jboolean useSharedSpaces = 0; | |
| 3960 | 317 |
| 8750 | 318 memset(classes_jsa, 0, sizeof(classes_jsa)); |
| 319 jvm_name = lib->name; | |
| 320 useSharedSpacesAddr = lookup_symbol(ph, jvm_name, USE_SHARED_SPACES_SYM); | |
| 321 if (useSharedSpacesAddr == 0) { | |
| 322 print_debug("can't lookup 'UseSharedSpaces' flag\n"); | |
| 323 return false; | |
| 324 } | |
| 3960 | 325 |
| 8750 | 326 // Hotspot vm types are not exported to build this library. So |
| 327 // using equivalent type jboolean to read the value of | |
| 328 // UseSharedSpaces which is same as hotspot type "bool". | |
| 329 if (read_jboolean(ph, useSharedSpacesAddr, &useSharedSpaces) != true) { | |
| 330 print_debug("can't read the value of 'UseSharedSpaces' flag\n"); | |
| 331 return false; | |
| 332 } | |
| 3960 | 333 |
| 8750 | 334 if ((int)useSharedSpaces == 0) { |
| 335 print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n"); | |
| 336 return true; | |
| 337 } | |
| 3960 | 338 |
| 8750 | 339 sharedArchivePathAddrAddr = lookup_symbol(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM); |
| 340 if (sharedArchivePathAddrAddr == 0) { | |
| 341 print_debug("can't lookup shared archive path symbol\n"); | |
| 342 return false; | |
| 343 } | |
| 3960 | 344 |
| 8750 | 345 if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) { |
| 346 print_debug("can't read shared archive path pointer\n"); | |
| 347 return false; | |
| 348 } | |
| 3960 | 349 |
| 8750 | 350 if (read_string(ph, sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) { |
| 351 print_debug("can't read shared archive path value\n"); | |
| 352 return false; | |
| 353 } | |
| 3960 | 354 |
| 8750 | 355 print_debug("looking for %s\n", classes_jsa); |
| 356 // open the class sharing archive file | |
| 357 fd = pathmap_open(classes_jsa); | |
| 358 if (fd < 0) { | |
| 359 print_debug("can't open %s!\n", classes_jsa); | |
| 360 ph->core->classes_jsa_fd = -1; | |
| 361 return false; | |
| 362 } else { | |
| 363 print_debug("opened %s\n", classes_jsa); | |
| 364 } | |
| 3960 | 365 |
| 8750 | 366 // read FileMapHeader from the file |
| 367 memset(&header, 0, sizeof(struct FileMapHeader)); | |
| 368 if ((n = read(fd, &header, sizeof(struct FileMapHeader))) | |
| 369 != sizeof(struct FileMapHeader)) { | |
| 370 print_debug("can't read shared archive file map header from %s\n", classes_jsa); | |
| 371 close(fd); | |
| 372 return false; | |
| 373 } | |
| 3960 | 374 |
| 8750 | 375 // check file magic |
| 376 if (header._magic != 0xf00baba2) { | |
| 377 print_debug("%s has bad shared archive file magic number 0x%x, expecing 0xf00baba2\n", | |
| 378 classes_jsa, header._magic); | |
| 379 close(fd); | |
| 380 return false; | |
| 381 } | |
| 382 | |
| 383 // check version | |
| 384 if (header._version != CURRENT_ARCHIVE_VERSION) { | |
| 385 print_debug("%s has wrong shared archive file version %d, expecting %d\n", | |
| 386 classes_jsa, header._version, CURRENT_ARCHIVE_VERSION); | |
| 387 close(fd); | |
| 388 return false; | |
| 389 } | |
| 3960 | 390 |
| 8750 | 391 ph->core->classes_jsa_fd = fd; |
| 392 // add read-only maps from classes[_g].jsa to the list of maps | |
| 393 for (m = 0; m < NUM_SHARED_MAPS; m++) { | |
| 394 if (header._space[m]._read_only) { | |
| 395 base = (uintptr_t) header._space[m]._base; | |
| 396 // no need to worry about the fractional pages at-the-end. | |
| 397 // possible fractional pages are handled by core_read_data. | |
| 398 add_class_share_map_info(ph, (off_t) header._space[m]._file_offset, | |
| 399 base, (size_t) header._space[m]._used); | |
| 400 print_debug("added a share archive map at 0x%lx\n", base); | |
| 401 } | |
| 3960 | 402 } |
| 8750 | 403 return true; |
| 404 } | |
| 405 lib = lib->next; | |
| 406 } | |
| 407 return true; | |
| 3960 | 408 } |
| 409 | |
| 410 //--------------------------------------------------------------------------- | |
| 411 // functions to handle map_info | |
| 412 | |
| 413 // Order mappings based on virtual address. We use this function as the | |
| 414 // callback for sorting the array of map_info pointers. | |
| 415 static int core_cmp_mapping(const void *lhsp, const void *rhsp) | |
| 416 { | |
| 8750 | 417 const map_info *lhs = *((const map_info **)lhsp); |
| 418 const map_info *rhs = *((const map_info **)rhsp); | |
| 3960 | 419 |
| 8750 | 420 if (lhs->vaddr == rhs->vaddr) { |
| 421 return (0); | |
| 422 } | |
| 3960 | 423 |
| 8750 | 424 return (lhs->vaddr < rhs->vaddr ? -1 : 1); |
| 3960 | 425 } |
| 426 | |
| 427 // we sort map_info by starting virtual address so that we can do | |
| 428 // binary search to read from an address. | |
| 429 static bool sort_map_array(struct ps_prochandle* ph) { | |
| 8750 | 430 size_t num_maps = ph->core->num_maps; |
| 431 map_info* map = ph->core->maps; | |
| 432 int i = 0; | |
| 3960 | 433 |
| 8750 | 434 // allocate map_array |
| 435 map_info** array; | |
| 436 if ( (array = (map_info**) malloc(sizeof(map_info*) * num_maps)) == NULL) { | |
| 437 print_debug("can't allocate memory for map array\n"); | |
| 438 return false; | |
| 439 } | |
| 3960 | 440 |
| 8750 | 441 // add maps to array |
| 442 while (map) { | |
| 443 array[i] = map; | |
| 444 i++; | |
| 445 map = map->next; | |
| 446 } | |
| 3960 | 447 |
| 8750 | 448 // sort is called twice. If this is second time, clear map array |
| 449 if (ph->core->map_array) { | |
| 450 free(ph->core->map_array); | |
| 451 } | |
| 452 ph->core->map_array = array; | |
| 453 // sort the map_info array by base virtual address. | |
| 454 qsort(ph->core->map_array, ph->core->num_maps, sizeof (map_info*), | |
| 455 core_cmp_mapping); | |
| 3960 | 456 |
| 8750 | 457 // print map |
| 458 if (is_debug()) { | |
| 459 int j = 0; | |
| 460 print_debug("---- sorted virtual address map ----\n"); | |
| 461 for (j = 0; j < ph->core->num_maps; j++) { | |
| 462 print_debug("base = 0x%lx\tsize = %d\n", ph->core->map_array[j]->vaddr, | |
| 463 ph->core->map_array[j]->memsz); | |
| 464 } | |
| 465 } | |
| 3960 | 466 |
| 8750 | 467 return true; |
| 3960 | 468 } |
| 469 | |
| 470 #ifndef MIN | |
| 471 #define MIN(x, y) (((x) < (y))? (x): (y)) | |
| 472 #endif | |
| 473 | |
| 474 static bool core_read_data(struct ps_prochandle* ph, uintptr_t addr, char *buf, size_t size) { | |
| 475 ssize_t resid = size; | |
| 476 int page_size=sysconf(_SC_PAGE_SIZE); | |
| 477 while (resid != 0) { | |
| 478 map_info *mp = core_lookup(ph, addr); | |
| 479 uintptr_t mapoff; | |
| 480 ssize_t len, rem; | |
| 481 off_t off; | |
| 482 int fd; | |
| 483 | |
| 8750 | 484 if (mp == NULL) { |
| 3960 | 485 break; /* No mapping for this address */ |
| 8750 | 486 } |
| 3960 | 487 |
| 488 fd = mp->fd; | |
| 489 mapoff = addr - mp->vaddr; | |
| 490 len = MIN(resid, mp->memsz - mapoff); | |
| 491 off = mp->offset + mapoff; | |
| 492 | |
| 8750 | 493 if ((len = pread(fd, buf, len, off)) <= 0) { |
| 3960 | 494 break; |
| 8750 | 495 } |
| 3960 | 496 |
| 497 resid -= len; | |
| 498 addr += len; | |
| 499 buf = (char *)buf + len; | |
| 500 | |
| 501 // mappings always start at page boundary. But, may end in fractional | |
| 502 // page. fill zeros for possible fractional page at the end of a mapping. | |
| 503 rem = mp->memsz % page_size; | |
| 504 if (rem > 0) { | |
| 505 rem = page_size - rem; | |
| 506 len = MIN(resid, rem); | |
| 507 resid -= len; | |
| 508 addr += len; | |
| 509 // we are not assuming 'buf' to be zero initialized. | |
| 510 memset(buf, 0, len); | |
| 511 buf += len; | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 if (resid) { | |
| 516 print_debug("core read failed for %d byte(s) @ 0x%lx (%d more bytes)\n", | |
| 517 size, addr, resid); | |
| 518 return false; | |
| 519 } else { | |
| 520 return true; | |
| 521 } | |
| 522 } | |
| 523 | |
| 524 // null implementation for write | |
| 525 static bool core_write_data(struct ps_prochandle* ph, | |
| 526 uintptr_t addr, const char *buf , size_t size) { | |
| 527 return false; | |
| 528 } | |
| 529 | |
| 530 static bool core_get_lwp_regs(struct ps_prochandle* ph, lwpid_t lwp_id, | |
| 531 struct reg* regs) { | |
| 8750 | 532 // for core we have cached the lwp regs after segment parsed |
| 533 sa_thread_info* thr = ph->threads; | |
| 3960 | 534 while (thr) { |
| 535 if (thr->lwp_id == lwp_id) { | |
| 536 memcpy(regs, &thr->regs, sizeof(struct reg)); | |
| 537 return true; | |
| 538 } | |
| 539 thr = thr->next; | |
| 540 } | |
| 541 return false; | |
| 542 } | |
| 543 | |
| 8750 | 544 static bool core_get_lwp_info(struct ps_prochandle *ph, lwpid_t id, void *info) { |
| 3960 | 545 print_debug("core_get_lwp_info not implemented\n"); |
| 546 return false; | |
| 547 } | |
| 548 | |
| 549 static ps_prochandle_ops core_ops = { | |
| 550 .release= core_release, | |
| 551 .p_pread= core_read_data, | |
| 552 .p_pwrite= core_write_data, | |
| 553 .get_lwp_regs= core_get_lwp_regs, | |
| 554 .get_lwp_info= core_get_lwp_info | |
| 555 }; | |
| 556 | |
| 8750 | 557 // from this point, mainly two blocks divided by def __APPLE__ |
| 558 // one for Macosx, the other for regular Bsd | |
| 559 | |
| 560 #ifdef __APPLE__ | |
| 561 | |
| 562 void print_thread(sa_thread_info *threadinfo) { | |
| 563 print_debug("thread added: %d\n", threadinfo->lwp_id); | |
| 564 print_debug("registers:\n"); | |
| 565 print_debug(" r_r15: 0x%" PRIx64 "\n", threadinfo->regs.r_r15); | |
| 566 print_debug(" r_r14: 0x%" PRIx64 "\n", threadinfo->regs.r_r14); | |
| 567 print_debug(" r_r13: 0x%" PRIx64 "\n", threadinfo->regs.r_r13); | |
| 568 print_debug(" r_r12: 0x%" PRIx64 "\n", threadinfo->regs.r_r12); | |
| 569 print_debug(" r_r11: 0x%" PRIx64 "\n", threadinfo->regs.r_r11); | |
| 570 print_debug(" r_r10: 0x%" PRIx64 "\n", threadinfo->regs.r_r10); | |
| 571 print_debug(" r_r9: 0x%" PRIx64 "\n", threadinfo->regs.r_r9); | |
| 572 print_debug(" r_r8: 0x%" PRIx64 "\n", threadinfo->regs.r_r8); | |
| 573 print_debug(" r_rdi: 0x%" PRIx64 "\n", threadinfo->regs.r_rdi); | |
| 574 print_debug(" r_rsi: 0x%" PRIx64 "\n", threadinfo->regs.r_rsi); | |
| 575 print_debug(" r_rbp: 0x%" PRIx64 "\n", threadinfo->regs.r_rbp); | |
| 576 print_debug(" r_rbx: 0x%" PRIx64 "\n", threadinfo->regs.r_rbx); | |
| 577 print_debug(" r_rdx: 0x%" PRIx64 "\n", threadinfo->regs.r_rdx); | |
| 578 print_debug(" r_rcx: 0x%" PRIx64 "\n", threadinfo->regs.r_rcx); | |
| 579 print_debug(" r_rax: 0x%" PRIx64 "\n", threadinfo->regs.r_rax); | |
| 580 print_debug(" r_fs: 0x%" PRIx32 "\n", threadinfo->regs.r_fs); | |
| 581 print_debug(" r_gs: 0x%" PRIx32 "\n", threadinfo->regs.r_gs); | |
| 582 print_debug(" r_rip 0x%" PRIx64 "\n", threadinfo->regs.r_rip); | |
| 583 print_debug(" r_cs: 0x%" PRIx64 "\n", threadinfo->regs.r_cs); | |
| 584 print_debug(" r_rsp: 0x%" PRIx64 "\n", threadinfo->regs.r_rsp); | |
| 585 print_debug(" r_rflags: 0x%" PRIx64 "\n", threadinfo->regs.r_rflags); | |
| 586 } | |
| 587 | |
| 588 // read all segments64 commands from core file | |
| 589 // read all thread commands from core file | |
| 590 static bool read_core_segments(struct ps_prochandle* ph) { | |
| 591 int i = 0; | |
| 592 int num_threads = 0; | |
| 593 int fd = ph->core->core_fd; | |
| 594 off_t offset = 0; | |
| 595 mach_header_64 fhead; | |
| 596 load_command lcmd; | |
| 597 segment_command_64 segcmd; | |
| 598 // thread_command thrcmd; | |
| 599 | |
| 600 lseek(fd, offset, SEEK_SET); | |
| 601 if(read(fd, (void *)&fhead, sizeof(mach_header_64)) != sizeof(mach_header_64)) { | |
| 602 goto err; | |
| 603 } | |
| 604 print_debug("total commands: %d\n", fhead.ncmds); | |
| 605 offset += sizeof(mach_header_64); | |
| 606 for (i = 0; i < fhead.ncmds; i++) { | |
| 607 lseek(fd, offset, SEEK_SET); | |
| 608 if (read(fd, (void *)&lcmd, sizeof(load_command)) != sizeof(load_command)) { | |
| 609 goto err; | |
| 610 } | |
| 611 offset += lcmd.cmdsize; // next command position | |
| 612 if (lcmd.cmd == LC_SEGMENT_64) { | |
| 613 lseek(fd, -sizeof(load_command), SEEK_CUR); | |
| 614 if (read(fd, (void *)&segcmd, sizeof(segment_command_64)) != sizeof(segment_command_64)) { | |
| 615 print_debug("failed to read LC_SEGMENT_64 i = %d!\n", i); | |
| 616 goto err; | |
| 617 } | |
| 618 if (add_map_info(ph, fd, segcmd.fileoff, segcmd.vmaddr, segcmd.vmsize) == NULL) { | |
| 619 print_debug("Failed to add map_info at i = %d\n", i); | |
| 620 goto err; | |
| 621 } | |
| 622 print_debug("segment added: %" PRIu64 " 0x%" PRIx64 " %d\n", | |
| 623 segcmd.fileoff, segcmd.vmaddr, segcmd.vmsize); | |
| 624 } else if (lcmd.cmd == LC_THREAD || lcmd.cmd == LC_UNIXTHREAD) { | |
| 625 typedef struct thread_fc { | |
| 626 uint32_t flavor; | |
| 627 uint32_t count; | |
| 628 } thread_fc; | |
| 629 thread_fc fc; | |
| 630 uint32_t size = sizeof(load_command); | |
| 631 while (size < lcmd.cmdsize) { | |
| 632 if (read(fd, (void *)&fc, sizeof(thread_fc)) != sizeof(thread_fc)) { | |
| 633 printf("Reading flavor, count failed.\n"); | |
| 634 goto err; | |
| 635 } | |
| 636 size += sizeof(thread_fc); | |
| 637 if (fc.flavor == x86_THREAD_STATE) { | |
| 638 x86_thread_state_t thrstate; | |
| 639 if (read(fd, (void *)&thrstate, sizeof(x86_thread_state_t)) != sizeof(x86_thread_state_t)) { | |
| 640 printf("Reading flavor, count failed.\n"); | |
| 641 goto err; | |
| 642 } | |
| 643 size += sizeof(x86_thread_state_t); | |
| 644 // create thread info list, update lwp_id later | |
| 645 sa_thread_info* newthr = add_thread_info(ph, (pthread_t) -1, (lwpid_t) num_threads++); | |
| 646 if (newthr == NULL) { | |
| 647 printf("create thread_info failed\n"); | |
| 648 goto err; | |
| 649 } | |
| 650 | |
| 651 // note __DARWIN_UNIX03 depengs on other definitions | |
| 652 #if __DARWIN_UNIX03 | |
| 653 #define get_register_v(regst, regname) \ | |
| 654 regst.uts.ts64.__##regname | |
| 655 #else | |
| 656 #define get_register_v(regst, regname) \ | |
| 657 regst.uts.ts64.##regname | |
| 658 #endif // __DARWIN_UNIX03 | |
| 659 newthr->regs.r_rax = get_register_v(thrstate, rax); | |
| 660 newthr->regs.r_rbx = get_register_v(thrstate, rbx); | |
| 661 newthr->regs.r_rcx = get_register_v(thrstate, rcx); | |
| 662 newthr->regs.r_rdx = get_register_v(thrstate, rdx); | |
| 663 newthr->regs.r_rdi = get_register_v(thrstate, rdi); | |
| 664 newthr->regs.r_rsi = get_register_v(thrstate, rsi); | |
| 665 newthr->regs.r_rbp = get_register_v(thrstate, rbp); | |
| 666 newthr->regs.r_rsp = get_register_v(thrstate, rsp); | |
| 667 newthr->regs.r_r8 = get_register_v(thrstate, r8); | |
| 668 newthr->regs.r_r9 = get_register_v(thrstate, r9); | |
| 669 newthr->regs.r_r10 = get_register_v(thrstate, r10); | |
| 670 newthr->regs.r_r11 = get_register_v(thrstate, r11); | |
| 671 newthr->regs.r_r12 = get_register_v(thrstate, r12); | |
| 672 newthr->regs.r_r13 = get_register_v(thrstate, r13); | |
| 673 newthr->regs.r_r14 = get_register_v(thrstate, r14); | |
| 674 newthr->regs.r_r15 = get_register_v(thrstate, r15); | |
| 675 newthr->regs.r_rip = get_register_v(thrstate, rip); | |
| 676 newthr->regs.r_rflags = get_register_v(thrstate, rflags); | |
| 677 newthr->regs.r_cs = get_register_v(thrstate, cs); | |
| 678 newthr->regs.r_fs = get_register_v(thrstate, fs); | |
| 679 newthr->regs.r_gs = get_register_v(thrstate, gs); | |
| 680 print_thread(newthr); | |
| 681 } else if (fc.flavor == x86_FLOAT_STATE) { | |
| 682 x86_float_state_t flstate; | |
| 683 if (read(fd, (void *)&flstate, sizeof(x86_float_state_t)) != sizeof(x86_float_state_t)) { | |
| 684 print_debug("Reading flavor, count failed.\n"); | |
| 685 goto err; | |
| 686 } | |
| 687 size += sizeof(x86_float_state_t); | |
| 688 } else if (fc.flavor == x86_EXCEPTION_STATE) { | |
| 689 x86_exception_state_t excpstate; | |
| 690 if (read(fd, (void *)&excpstate, sizeof(x86_exception_state_t)) != sizeof(x86_exception_state_t)) { | |
| 691 printf("Reading flavor, count failed.\n"); | |
| 692 goto err; | |
| 693 } | |
| 694 size += sizeof(x86_exception_state_t); | |
| 695 } | |
| 696 } | |
| 697 } | |
| 698 } | |
| 699 return true; | |
| 700 err: | |
| 701 return false; | |
| 702 } | |
| 703 | |
| 704 /**local function **/ | |
| 705 bool exists(const char *fname) | |
| 706 { | |
| 707 int fd; | |
| 708 if ((fd = open(fname, O_RDONLY)) > 0) { | |
| 709 close(fd); | |
| 710 return true; | |
| 711 } | |
| 712 return false; | |
| 713 } | |
| 714 | |
| 715 // we check: 1. lib | |
| 716 // 2. lib/server | |
| 717 // 3. jre/lib | |
| 718 // 4. jre/lib/server | |
| 719 // from: 1. exe path | |
| 720 // 2. JAVA_HOME | |
| 721 // 3. DYLD_LIBRARY_PATH | |
| 722 static bool get_real_path(struct ps_prochandle* ph, char *rpath) { | |
| 723 /** check if they exist in JAVA ***/ | |
| 724 char* execname = ph->core->exec_path; | |
| 725 char filepath[4096]; | |
| 726 char* filename = strrchr(rpath, '/'); // like /libjvm.dylib | |
| 727 if (filename == NULL) { | |
| 728 return false; | |
| 729 } | |
| 730 | |
| 731 char* posbin = strstr(execname, "/bin/java"); | |
| 732 if (posbin != NULL) { | |
| 733 memcpy(filepath, execname, posbin - execname); // not include trailing '/' | |
| 734 filepath[posbin - execname] = '\0'; | |
| 735 } else { | |
| 736 char* java_home = getenv("JAVA_HOME"); | |
| 737 if (java_home != NULL) { | |
| 738 strcpy(filepath, java_home); | |
| 739 } else { | |
| 740 char* dyldpath = getenv("DYLD_LIBRARY_PATH"); | |
| 741 char* dypath = strtok(dyldpath, ":"); | |
| 742 while (dypath != NULL) { | |
| 743 strcpy(filepath, dypath); | |
| 744 strcat(filepath, filename); | |
| 745 if (exists(filepath)) { | |
| 746 strcpy(rpath, filepath); | |
| 747 return true; | |
| 748 } | |
| 749 dypath = strtok(dyldpath, ":"); | |
| 750 } | |
| 751 // not found | |
| 752 return false; | |
| 753 } | |
| 754 } | |
| 755 // for exec and java_home, jdkpath now is filepath | |
| 756 size_t filepath_base_size = strlen(filepath); | |
| 757 | |
| 758 // first try /lib/ and /lib/server | |
| 759 strcat(filepath, "/lib"); | |
| 760 strcat(filepath, filename); | |
| 761 if (exists(filepath)) { | |
| 762 strcpy(rpath, filepath); | |
| 763 return true; | |
| 764 } | |
| 765 char* pos = strstr(filepath, filename); // like /libjvm.dylib | |
| 766 *pos = '\0'; | |
| 767 strcat(filepath, "/server"); | |
| 768 strcat(filepath, filename); | |
| 769 if (exists(filepath)) { | |
| 770 strcpy(rpath, filepath); | |
| 771 return true; | |
| 772 } | |
| 773 | |
| 774 // then try /jre/lib/ and /jre/lib/server | |
| 775 filepath[filepath_base_size] = '\0'; | |
| 776 strcat(filepath, "/jre/lib"); | |
| 777 strcat(filepath, filename); | |
| 778 if (exists(filepath)) { | |
| 779 strcpy(rpath, filepath); | |
| 780 return true; | |
| 781 } | |
| 782 pos = strstr(filepath, filename); | |
| 783 *pos = '\0'; | |
| 784 strcat(filepath, "/server"); | |
| 785 strcat(filepath, filename); | |
| 786 if (exists(filepath)) { | |
| 787 strcpy(rpath, filepath); | |
| 788 return true; | |
| 789 } | |
| 790 | |
| 791 return false; | |
| 792 } | |
| 793 | |
| 794 static bool read_shared_lib_info(struct ps_prochandle* ph) { | |
| 795 static int pagesize = 0; | |
| 796 int fd = ph->core->core_fd; | |
| 797 int i = 0, j; | |
| 798 uint32_t v; | |
| 799 mach_header_64 header; // used to check if a file header in segment | |
| 800 load_command lcmd; | |
| 801 dylib_command dylibcmd; | |
| 802 | |
| 803 char name[BUF_SIZE]; // use to store name | |
| 804 | |
| 805 if (pagesize == 0) { | |
| 806 pagesize = getpagesize(); | |
| 807 print_debug("page size is %d\n", pagesize); | |
| 808 } | |
| 809 for (j = 0; j < ph->core->num_maps; j++) { | |
| 810 map_info *iter = ph->core->map_array[j]; // head | |
| 811 off_t fpos = iter->offset; | |
| 812 if (iter->fd != fd) { | |
| 813 // only search core file! | |
| 814 continue; | |
| 815 } | |
| 816 print_debug("map_info %d: vmaddr = 0x%016" PRIx64 " fileoff = %" PRIu64 " vmsize = %" PRIu64 "\n", | |
| 817 j, iter->vaddr, iter->offset, iter->memsz); | |
| 818 lseek(fd, fpos, SEEK_SET); | |
| 819 // we assume .dylib loaded at segment address --- which is true for JVM libraries | |
| 820 // multiple files may be loaded in one segment. | |
| 821 // if first word is not a magic word, means this segment does not contain lib file. | |
| 822 if (read(fd, (void *)&v, sizeof(uint32_t)) == sizeof(uint32_t)) { | |
| 823 if (v != MH_MAGIC_64) { | |
| 824 continue; | |
| 825 } | |
| 826 } else { | |
| 827 // may be encountered last map, which is not readable | |
| 828 continue; | |
| 829 } | |
| 830 while (ltell(fd) - iter->offset < iter->memsz) { | |
| 831 lseek(fd, fpos, SEEK_SET); | |
| 832 if (read(fd, (void *)&v, sizeof(uint32_t)) != sizeof(uint32_t)) { | |
| 833 break; | |
| 834 } | |
| 835 if (v != MH_MAGIC_64) { | |
| 836 fpos = (ltell(fd) + pagesize -1)/pagesize * pagesize; | |
| 837 continue; | |
| 838 } | |
| 839 lseek(fd, -sizeof(uint32_t), SEEK_CUR); | |
| 840 // this is the file begining to core file. | |
| 841 if (read(fd, (void *)&header, sizeof(mach_header_64)) != sizeof(mach_header_64)) { | |
| 842 goto err; | |
| 843 } | |
| 844 fpos = ltell(fd); | |
| 845 | |
| 846 // found a mach-o file in this segment | |
| 847 for (i = 0; i < header.ncmds; i++) { | |
| 848 // read commands in this "file" | |
| 849 // LC_ID_DYLIB is the file itself for a .dylib | |
| 850 lseek(fd, fpos, SEEK_SET); | |
| 851 if (read(fd, (void *)&lcmd, sizeof(load_command)) != sizeof(load_command)) { | |
| 852 return false; // error | |
| 853 } | |
| 854 fpos += lcmd.cmdsize; // next command position | |
| 855 // make sure still within seg size. | |
| 856 if (fpos - lcmd.cmdsize - iter->offset > iter->memsz) { | |
| 857 print_debug("Warning: out of segement limit: %ld \n", fpos - lcmd.cmdsize - iter->offset); | |
| 858 break; // no need to iterate all commands | |
| 859 } | |
| 860 if (lcmd.cmd == LC_ID_DYLIB) { | |
| 861 lseek(fd, -sizeof(load_command), SEEK_CUR); | |
| 862 if (read(fd, (void *)&dylibcmd, sizeof(dylib_command)) != sizeof(dylib_command)) { | |
| 863 return false; | |
| 864 } | |
| 865 /**** name stored at dylib_command.dylib.name.offset, is a C string */ | |
| 866 lseek(fd, dylibcmd.dylib.name.offset - sizeof(dylib_command), SEEK_CUR); | |
| 867 int j = 0; | |
| 868 while (j < BUF_SIZE) { | |
| 869 read(fd, (void *)(name + j), sizeof(char)); | |
| 870 if (name[j] == '\0') break; | |
| 871 j++; | |
| 872 } | |
| 873 print_debug("%s\n", name); | |
| 874 // changed name from @rpath/xxxx.dylib to real path | |
| 875 if (strrchr(name, '@')) { | |
| 876 get_real_path(ph, name); | |
| 877 print_debug("get_real_path returned: %s\n", name); | |
| 878 } | |
| 879 add_lib_info(ph, name, iter->vaddr); | |
| 880 break; | |
| 881 } | |
| 882 } | |
| 883 // done with the file, advanced to next page to search more files | |
| 884 fpos = (ltell(fd) + pagesize - 1) / pagesize * pagesize; | |
| 885 } | |
| 886 } | |
| 887 return true; | |
| 888 err: | |
| 889 return false; | |
| 890 } | |
| 891 | |
| 892 bool read_macho64_header(int fd, mach_header_64* core_header) { | |
| 893 bool is_macho = false; | |
| 894 if (fd < 0) return false; | |
| 895 off_t pos = ltell(fd); | |
| 896 lseek(fd, 0, SEEK_SET); | |
| 897 if (read(fd, (void *)core_header, sizeof(mach_header_64)) != sizeof(mach_header_64)) { | |
| 898 is_macho = false; | |
| 899 } else { | |
| 900 is_macho = (core_header->magic == MH_MAGIC_64 || core_header->magic == MH_CIGAM_64); | |
| 901 } | |
| 902 lseek(fd, pos, SEEK_SET); | |
| 903 return is_macho; | |
| 904 } | |
| 905 | |
| 906 // the one and only one exposed stuff from this file | |
| 907 struct ps_prochandle* Pgrab_core(const char* exec_file, const char* core_file) { | |
| 908 mach_header_64 core_header; | |
| 909 mach_header_64 exec_header; | |
| 910 | |
| 911 struct ps_prochandle* ph = (struct ps_prochandle*) calloc(1, sizeof(struct ps_prochandle)); | |
| 912 if (ph == NULL) { | |
| 913 print_debug("cant allocate ps_prochandle\n"); | |
| 914 return NULL; | |
| 915 } | |
| 916 | |
| 917 if ((ph->core = (struct core_data*) calloc(1, sizeof(struct core_data))) == NULL) { | |
| 918 free(ph); | |
| 919 print_debug("can't allocate ps_prochandle\n"); | |
| 920 return NULL; | |
| 921 } | |
| 922 | |
| 923 // initialize ph | |
| 924 ph->ops = &core_ops; | |
| 925 ph->core->core_fd = -1; | |
| 926 ph->core->exec_fd = -1; | |
| 927 ph->core->interp_fd = -1; | |
| 928 | |
| 929 print_debug("exec: %s core: %s", exec_file, core_file); | |
| 930 | |
| 931 strncpy(ph->core->exec_path, exec_file, sizeof(ph->core->exec_path)); | |
| 932 | |
| 933 // open the core file | |
| 934 if ((ph->core->core_fd = open(core_file, O_RDONLY)) < 0) { | |
| 935 print_error("can't open core file\n"); | |
| 936 goto err; | |
| 937 } | |
| 938 | |
| 939 // read core file header | |
| 940 if (read_macho64_header(ph->core->core_fd, &core_header) != true || core_header.filetype != MH_CORE) { | |
| 941 print_debug("core file is not a valid Mach-O file\n"); | |
| 942 goto err; | |
| 943 } | |
| 944 | |
| 945 if ((ph->core->exec_fd = open(exec_file, O_RDONLY)) < 0) { | |
| 946 print_error("can't open executable file\n"); | |
| 947 goto err; | |
| 948 } | |
| 949 | |
| 950 if (read_macho64_header(ph->core->exec_fd, &exec_header) != true || | |
| 951 exec_header.filetype != MH_EXECUTE) { | |
| 952 print_error("executable file is not a valid Mach-O file\n"); | |
| 953 goto err; | |
| 954 } | |
| 955 | |
| 956 // process core file segments | |
| 957 if (read_core_segments(ph) != true) { | |
| 958 print_error("failed to read core segments\n"); | |
| 959 goto err; | |
| 960 } | |
| 961 | |
| 962 // allocate and sort maps into map_array, we need to do this | |
| 963 // here because read_shared_lib_info needs to read from debuggee | |
| 964 // address space | |
| 965 if (sort_map_array(ph) != true) { | |
| 966 print_error("failed to sort segment map array\n"); | |
| 967 goto err; | |
| 968 } | |
| 969 | |
| 970 if (read_shared_lib_info(ph) != true) { | |
| 971 print_error("failed to read libraries\n"); | |
| 972 goto err; | |
| 973 } | |
| 974 | |
| 975 // sort again because we have added more mappings from shared objects | |
| 976 if (sort_map_array(ph) != true) { | |
| 977 print_error("failed to sort segment map array\n"); | |
| 978 goto err; | |
| 979 } | |
| 980 | |
| 981 if (init_classsharing_workaround(ph) != true) { | |
| 982 print_error("failed to workaround classshareing\n"); | |
| 983 goto err; | |
| 984 } | |
| 985 | |
| 986 print_debug("Leave Pgrab_core\n"); | |
| 987 return ph; | |
| 988 | |
| 989 err: | |
| 990 Prelease(ph); | |
| 991 return NULL; | |
| 992 } | |
| 993 | |
| 994 #else // __APPLE__ (none macosx) | |
| 995 | |
| 996 // read regs and create thread from core file | |
| 3960 | 997 static bool core_handle_prstatus(struct ps_prochandle* ph, const char* buf, size_t nbytes) { |
| 998 // we have to read prstatus_t from buf | |
| 999 // assert(nbytes == sizeof(prstaus_t), "size mismatch on prstatus_t"); | |
| 1000 prstatus_t* prstat = (prstatus_t*) buf; | |
| 8750 | 1001 sa_thread_info* newthr; |
| 3960 | 1002 print_debug("got integer regset for lwp %d\n", prstat->pr_pid); |
| 1003 // we set pthread_t to -1 for core dump | |
| 1004 if((newthr = add_thread_info(ph, (pthread_t) -1, prstat->pr_pid)) == NULL) | |
| 1005 return false; | |
| 1006 | |
| 1007 // copy regs | |
| 1008 memcpy(&newthr->regs, &prstat->pr_reg, sizeof(struct reg)); | |
| 1009 | |
| 1010 if (is_debug()) { | |
| 1011 print_debug("integer regset\n"); | |
| 1012 #ifdef i386 | |
| 1013 // print the regset | |
| 1014 print_debug("\teax = 0x%x\n", newthr->regs.r_eax); | |
| 1015 print_debug("\tebx = 0x%x\n", newthr->regs.r_ebx); | |
| 1016 print_debug("\tecx = 0x%x\n", newthr->regs.r_ecx); | |
| 1017 print_debug("\tedx = 0x%x\n", newthr->regs.r_edx); | |
| 1018 print_debug("\tesp = 0x%x\n", newthr->regs.r_esp); | |
| 1019 print_debug("\tebp = 0x%x\n", newthr->regs.r_ebp); | |
| 1020 print_debug("\tesi = 0x%x\n", newthr->regs.r_esi); | |
| 1021 print_debug("\tedi = 0x%x\n", newthr->regs.r_edi); | |
| 1022 print_debug("\teip = 0x%x\n", newthr->regs.r_eip); | |
| 1023 #endif | |
| 1024 | |
| 1025 #if defined(amd64) || defined(x86_64) | |
| 1026 // print the regset | |
| 1027 print_debug("\tr15 = 0x%lx\n", newthr->regs.r_r15); | |
| 1028 print_debug("\tr14 = 0x%lx\n", newthr->regs.r_r14); | |
| 1029 print_debug("\tr13 = 0x%lx\n", newthr->regs.r_r13); | |
| 1030 print_debug("\tr12 = 0x%lx\n", newthr->regs.r_r12); | |
| 1031 print_debug("\trbp = 0x%lx\n", newthr->regs.r_rbp); | |
| 1032 print_debug("\trbx = 0x%lx\n", newthr->regs.r_rbx); | |
| 1033 print_debug("\tr11 = 0x%lx\n", newthr->regs.r_r11); | |
| 1034 print_debug("\tr10 = 0x%lx\n", newthr->regs.r_r10); | |
| 1035 print_debug("\tr9 = 0x%lx\n", newthr->regs.r_r9); | |
| 1036 print_debug("\tr8 = 0x%lx\n", newthr->regs.r_r8); | |
| 1037 print_debug("\trax = 0x%lx\n", newthr->regs.r_rax); | |
| 1038 print_debug("\trcx = 0x%lx\n", newthr->regs.r_rcx); | |
| 1039 print_debug("\trdx = 0x%lx\n", newthr->regs.r_rdx); | |
| 1040 print_debug("\trsi = 0x%lx\n", newthr->regs.r_rsi); | |
| 1041 print_debug("\trdi = 0x%lx\n", newthr->regs.r_rdi); | |
| 1042 //print_debug("\torig_rax = 0x%lx\n", newthr->regs.orig_rax); | |
| 1043 print_debug("\trip = 0x%lx\n", newthr->regs.r_rip); | |
| 1044 print_debug("\tcs = 0x%lx\n", newthr->regs.r_cs); | |
| 1045 //print_debug("\teflags = 0x%lx\n", newthr->regs.eflags); | |
| 1046 print_debug("\trsp = 0x%lx\n", newthr->regs.r_rsp); | |
| 1047 print_debug("\tss = 0x%lx\n", newthr->regs.r_ss); | |
| 1048 //print_debug("\tfs_base = 0x%lx\n", newthr->regs.fs_base); | |
| 1049 //print_debug("\tgs_base = 0x%lx\n", newthr->regs.gs_base); | |
| 1050 //print_debug("\tds = 0x%lx\n", newthr->regs.ds); | |
| 1051 //print_debug("\tes = 0x%lx\n", newthr->regs.es); | |
| 1052 //print_debug("\tfs = 0x%lx\n", newthr->regs.fs); | |
| 1053 //print_debug("\tgs = 0x%lx\n", newthr->regs.gs); | |
| 1054 #endif | |
| 1055 } | |
| 1056 | |
| 1057 return true; | |
| 1058 } | |
| 1059 | |
| 1060 #define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y)) | |
| 1061 | |
| 1062 // read NT_PRSTATUS entries from core NOTE segment | |
| 1063 static bool core_handle_note(struct ps_prochandle* ph, ELF_PHDR* note_phdr) { | |
| 1064 char* buf = NULL; | |
| 1065 char* p = NULL; | |
| 1066 size_t size = note_phdr->p_filesz; | |
| 1067 | |
| 1068 // we are interested in just prstatus entries. we will ignore the rest. | |
| 1069 // Advance the seek pointer to the start of the PT_NOTE data | |
| 1070 if (lseek(ph->core->core_fd, note_phdr->p_offset, SEEK_SET) == (off_t)-1) { | |
| 1071 print_debug("failed to lseek to PT_NOTE data\n"); | |
| 1072 return false; | |
| 1073 } | |
| 1074 | |
| 1075 // Now process the PT_NOTE structures. Each one is preceded by | |
| 1076 // an Elf{32/64}_Nhdr structure describing its type and size. | |
| 1077 if ( (buf = (char*) malloc(size)) == NULL) { | |
| 1078 print_debug("can't allocate memory for reading core notes\n"); | |
| 1079 goto err; | |
| 1080 } | |
| 1081 | |
| 1082 // read notes into buffer | |
| 1083 if (read(ph->core->core_fd, buf, size) != size) { | |
| 1084 print_debug("failed to read notes, core file must have been truncated\n"); | |
| 1085 goto err; | |
| 1086 } | |
| 1087 | |
| 1088 p = buf; | |
| 1089 while (p < buf + size) { | |
| 1090 ELF_NHDR* notep = (ELF_NHDR*) p; | |
| 1091 char* descdata = p + sizeof(ELF_NHDR) + ROUNDUP(notep->n_namesz, 4); | |
| 1092 print_debug("Note header with n_type = %d and n_descsz = %u\n", | |
| 1093 notep->n_type, notep->n_descsz); | |
| 1094 | |
| 1095 if (notep->n_type == NT_PRSTATUS) { | |
| 8750 | 1096 if (core_handle_prstatus(ph, descdata, notep->n_descsz) != true) { |
| 3960 | 1097 return false; |
| 8750 | 1098 } |
| 3960 | 1099 } |
| 1100 p = descdata + ROUNDUP(notep->n_descsz, 4); | |
| 1101 } | |
| 1102 | |
| 1103 free(buf); | |
| 1104 return true; | |
| 1105 | |
| 1106 err: | |
| 1107 if (buf) free(buf); | |
| 1108 return false; | |
| 1109 } | |
| 1110 | |
| 1111 // read all segments from core file | |
| 1112 static bool read_core_segments(struct ps_prochandle* ph, ELF_EHDR* core_ehdr) { | |
| 1113 int i = 0; | |
| 1114 ELF_PHDR* phbuf = NULL; | |
| 1115 ELF_PHDR* core_php = NULL; | |
| 1116 | |
| 1117 if ((phbuf = read_program_header_table(ph->core->core_fd, core_ehdr)) == NULL) | |
| 1118 return false; | |
| 1119 | |
| 1120 /* | |
| 1121 * Now iterate through the program headers in the core file. | |
| 1122 * We're interested in two types of Phdrs: PT_NOTE (which | |
| 1123 * contains a set of saved /proc structures), and PT_LOAD (which | |
| 1124 * represents a memory mapping from the process's address space). | |
| 1125 * | |
| 1126 * Difference b/w Solaris PT_NOTE and BSD PT_NOTE: | |
| 1127 * | |
| 1128 * In Solaris there are two PT_NOTE segments the first PT_NOTE (if present) | |
| 1129 * contains /proc structs in the pre-2.6 unstructured /proc format. the last | |
| 1130 * PT_NOTE has data in new /proc format. | |
| 1131 * | |
| 1132 * In Solaris, there is only one pstatus (process status). pstatus contains | |
| 1133 * integer register set among other stuff. For each LWP, we have one lwpstatus | |
| 1134 * entry that has integer regset for that LWP. | |
| 1135 * | |
| 1136 * Linux threads are actually 'clone'd processes. To support core analysis | |
| 1137 * of "multithreaded" process, Linux creates more than one pstatus (called | |
| 1138 * "prstatus") entry in PT_NOTE. Each prstatus entry has integer regset for one | |
| 1139 * "thread". Please refer to Linux kernel src file 'fs/binfmt_elf.c', in particular | |
| 1140 * function "elf_core_dump". | |
| 1141 */ | |
| 1142 | |
| 1143 for (core_php = phbuf, i = 0; i < core_ehdr->e_phnum; i++) { | |
| 1144 switch (core_php->p_type) { | |
| 1145 case PT_NOTE: | |
| 8750 | 1146 if (core_handle_note(ph, core_php) != true) { |
| 1147 goto err; | |
| 1148 } | |
| 3960 | 1149 break; |
| 1150 | |
| 1151 case PT_LOAD: { | |
| 1152 if (core_php->p_filesz != 0) { | |
| 1153 if (add_map_info(ph, ph->core->core_fd, core_php->p_offset, | |
| 1154 core_php->p_vaddr, core_php->p_filesz) == NULL) goto err; | |
| 1155 } | |
| 1156 break; | |
| 1157 } | |
| 1158 } | |
| 1159 | |
| 1160 core_php++; | |
| 1161 } | |
| 1162 | |
| 1163 free(phbuf); | |
| 1164 return true; | |
| 1165 err: | |
| 1166 free(phbuf); | |
| 1167 return false; | |
| 1168 } | |
| 1169 | |
| 1170 // read segments of a shared object | |
| 1171 static bool read_lib_segments(struct ps_prochandle* ph, int lib_fd, ELF_EHDR* lib_ehdr, uintptr_t lib_base) { | |
| 1172 int i = 0; | |
| 1173 ELF_PHDR* phbuf; | |
| 1174 ELF_PHDR* lib_php = NULL; | |
| 1175 | |
| 1176 if ((phbuf = read_program_header_table(lib_fd, lib_ehdr)) == NULL) | |
| 1177 return false; | |
| 1178 | |
| 1179 // we want to process only PT_LOAD segments that are not writable. | |
| 1180 // i.e., text segments. The read/write/exec (data) segments would | |
| 1181 // have been already added from core file segments. | |
| 1182 for (lib_php = phbuf, i = 0; i < lib_ehdr->e_phnum; i++) { | |
| 1183 if ((lib_php->p_type == PT_LOAD) && !(lib_php->p_flags & PF_W) && (lib_php->p_filesz != 0)) { | |
| 1184 if (add_map_info(ph, lib_fd, lib_php->p_offset, lib_php->p_vaddr + lib_base, lib_php->p_filesz) == NULL) | |
| 1185 goto err; | |
| 1186 } | |
| 1187 lib_php++; | |
| 1188 } | |
| 1189 | |
| 1190 free(phbuf); | |
| 1191 return true; | |
| 1192 err: | |
| 1193 free(phbuf); | |
| 1194 return false; | |
| 1195 } | |
| 1196 | |
| 1197 // process segments from interpreter (ld-elf.so.1) | |
| 1198 static bool read_interp_segments(struct ps_prochandle* ph) { | |
| 1199 ELF_EHDR interp_ehdr; | |
| 1200 | |
| 1201 if (read_elf_header(ph->core->interp_fd, &interp_ehdr) != true) { | |
| 1202 print_debug("interpreter is not a valid ELF file\n"); | |
| 1203 return false; | |
| 1204 } | |
| 1205 | |
| 1206 if (read_lib_segments(ph, ph->core->interp_fd, &interp_ehdr, ph->core->ld_base_addr) != true) { | |
| 1207 print_debug("can't read segments of interpreter\n"); | |
| 1208 return false; | |
| 1209 } | |
| 1210 | |
| 1211 return true; | |
| 1212 } | |
| 1213 | |
| 1214 // process segments of a a.out | |
| 1215 static bool read_exec_segments(struct ps_prochandle* ph, ELF_EHDR* exec_ehdr) { | |
| 1216 int i = 0; | |
| 1217 ELF_PHDR* phbuf = NULL; | |
| 1218 ELF_PHDR* exec_php = NULL; | |
| 1219 | |
| 1220 if ((phbuf = read_program_header_table(ph->core->exec_fd, exec_ehdr)) == NULL) | |
| 1221 return false; | |
| 1222 | |
| 1223 for (exec_php = phbuf, i = 0; i < exec_ehdr->e_phnum; i++) { | |
| 1224 switch (exec_php->p_type) { | |
| 1225 | |
| 1226 // add mappings for PT_LOAD segments | |
| 1227 case PT_LOAD: { | |
| 1228 // add only non-writable segments of non-zero filesz | |
| 1229 if (!(exec_php->p_flags & PF_W) && exec_php->p_filesz != 0) { | |
| 1230 if (add_map_info(ph, ph->core->exec_fd, exec_php->p_offset, exec_php->p_vaddr, exec_php->p_filesz) == NULL) goto err; | |
| 1231 } | |
| 1232 break; | |
| 1233 } | |
| 1234 | |
| 1235 // read the interpreter and it's segments | |
| 1236 case PT_INTERP: { | |
| 1237 char interp_name[BUF_SIZE]; | |
| 1238 | |
| 1239 pread(ph->core->exec_fd, interp_name, MIN(exec_php->p_filesz, BUF_SIZE), exec_php->p_offset); | |
| 1240 print_debug("ELF interpreter %s\n", interp_name); | |
| 1241 // read interpreter segments as well | |
| 1242 if ((ph->core->interp_fd = pathmap_open(interp_name)) < 0) { | |
| 1243 print_debug("can't open runtime loader\n"); | |
| 1244 goto err; | |
| 1245 } | |
| 1246 break; | |
| 1247 } | |
| 1248 | |
| 1249 // from PT_DYNAMIC we want to read address of first link_map addr | |
| 1250 case PT_DYNAMIC: { | |
| 1251 ph->core->dynamic_addr = exec_php->p_vaddr; | |
| 1252 print_debug("address of _DYNAMIC is 0x%lx\n", ph->core->dynamic_addr); | |
| 1253 break; | |
| 1254 } | |
| 1255 | |
| 1256 } // switch | |
| 1257 exec_php++; | |
| 1258 } // for | |
| 1259 | |
| 1260 free(phbuf); | |
| 1261 return true; | |
| 1262 err: | |
| 1263 free(phbuf); | |
| 1264 return false; | |
| 1265 } | |
| 1266 | |
| 1267 #define FIRST_LINK_MAP_OFFSET offsetof(struct r_debug, r_map) | |
| 1268 #define LD_BASE_OFFSET offsetof(struct r_debug, r_ldbase) | |
| 1269 #define LINK_MAP_ADDR_OFFSET offsetof(struct link_map, l_addr) | |
| 1270 #define LINK_MAP_NAME_OFFSET offsetof(struct link_map, l_name) | |
| 1271 #define LINK_MAP_NEXT_OFFSET offsetof(struct link_map, l_next) | |
| 1272 | |
| 1273 // read shared library info from runtime linker's data structures. | |
| 1274 // This work is done by librtlb_db in Solaris | |
| 1275 static bool read_shared_lib_info(struct ps_prochandle* ph) { | |
| 8750 | 1276 uintptr_t addr = ph->core->dynamic_addr; |
| 1277 uintptr_t debug_base; | |
| 1278 uintptr_t first_link_map_addr; | |
| 1279 uintptr_t ld_base_addr; | |
| 1280 uintptr_t link_map_addr; | |
| 1281 uintptr_t lib_base_diff; | |
| 1282 uintptr_t lib_base; | |
| 1283 uintptr_t lib_name_addr; | |
| 1284 char lib_name[BUF_SIZE]; | |
| 1285 ELF_DYN dyn; | |
| 1286 ELF_EHDR elf_ehdr; | |
| 1287 int lib_fd; | |
| 3960 | 1288 |
| 8750 | 1289 // _DYNAMIC has information of the form |
| 1290 // [tag] [data] [tag] [data] ..... | |
| 1291 // Both tag and data are pointer sized. | |
| 1292 // We look for dynamic info with DT_DEBUG. This has shared object info. | |
| 1293 // refer to struct r_debug in link.h | |
| 3960 | 1294 |
| 8750 | 1295 dyn.d_tag = DT_NULL; |
| 1296 while (dyn.d_tag != DT_DEBUG) { | |
| 1297 if (ps_pread(ph, (psaddr_t) addr, &dyn, sizeof(ELF_DYN)) != PS_OK) { | |
| 1298 print_debug("can't read debug info from _DYNAMIC\n"); | |
| 1299 return false; | |
| 1300 } | |
| 1301 addr += sizeof(ELF_DYN); | |
| 1302 } | |
| 3960 | 1303 |
| 8750 | 1304 // we have got Dyn entry with DT_DEBUG |
| 1305 debug_base = dyn.d_un.d_ptr; | |
| 1306 // at debug_base we have struct r_debug. This has first link map in r_map field | |
| 1307 if (ps_pread(ph, (psaddr_t) debug_base + FIRST_LINK_MAP_OFFSET, | |
| 1308 &first_link_map_addr, sizeof(uintptr_t)) != PS_OK) { | |
| 1309 print_debug("can't read first link map address\n"); | |
| 1310 return false; | |
| 1311 } | |
| 3960 | 1312 |
| 8750 | 1313 // read ld_base address from struct r_debug |
| 1314 // XXX: There is no r_ldbase member on BSD | |
| 1315 /* | |
| 1316 if (ps_pread(ph, (psaddr_t) debug_base + LD_BASE_OFFSET, &ld_base_addr, | |
| 1317 sizeof(uintptr_t)) != PS_OK) { | |
| 1318 print_debug("can't read ld base address\n"); | |
| 1319 return false; | |
| 1320 } | |
| 1321 ph->core->ld_base_addr = ld_base_addr; | |
| 1322 */ | |
| 1323 ph->core->ld_base_addr = 0; | |
| 3960 | 1324 |
| 8750 | 1325 print_debug("interpreter base address is 0x%lx\n", ld_base_addr); |
| 3960 | 1326 |
| 8750 | 1327 // now read segments from interp (i.e ld-elf.so.1) |
| 1328 if (read_interp_segments(ph) != true) | |
| 1329 return false; | |
| 3960 | 1330 |
| 8750 | 1331 // after adding interpreter (ld.so) mappings sort again |
| 1332 if (sort_map_array(ph) != true) | |
| 1333 return false; | |
| 3960 | 1334 |
| 8750 | 1335 print_debug("first link map is at 0x%lx\n", first_link_map_addr); |
| 3960 | 1336 |
| 8750 | 1337 link_map_addr = first_link_map_addr; |
| 1338 while (link_map_addr != 0) { | |
| 1339 // read library base address of the .so. Note that even though <sys/link.h> calls | |
| 1340 // link_map->l_addr as "base address", this is * not * really base virtual | |
| 1341 // address of the shared object. This is actually the difference b/w the virtual | |
| 1342 // address mentioned in shared object and the actual virtual base where runtime | |
| 1343 // linker loaded it. We use "base diff" in read_lib_segments call below. | |
| 3960 | 1344 |
| 8750 | 1345 if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_ADDR_OFFSET, |
| 1346 &lib_base_diff, sizeof(uintptr_t)) != PS_OK) { | |
| 1347 print_debug("can't read shared object base address diff\n"); | |
| 1348 return false; | |
| 1349 } | |
| 3960 | 1350 |
| 8750 | 1351 // read address of the name |
| 1352 if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NAME_OFFSET, | |
| 1353 &lib_name_addr, sizeof(uintptr_t)) != PS_OK) { | |
| 1354 print_debug("can't read address of shared object name\n"); | |
| 1355 return false; | |
| 1356 } | |
| 3960 | 1357 |
| 8750 | 1358 // read name of the shared object |
| 1359 if (read_string(ph, (uintptr_t) lib_name_addr, lib_name, sizeof(lib_name)) != true) { | |
| 1360 print_debug("can't read shared object name\n"); | |
| 1361 return false; | |
| 1362 } | |
| 3960 | 1363 |
| 8750 | 1364 if (lib_name[0] != '\0') { |
| 1365 // ignore empty lib names | |
| 1366 lib_fd = pathmap_open(lib_name); | |
| 3960 | 1367 |
| 8750 | 1368 if (lib_fd < 0) { |
| 1369 print_debug("can't open shared object %s\n", lib_name); | |
| 1370 // continue with other libraries... | |
| 1371 } else { | |
| 1372 if (read_elf_header(lib_fd, &elf_ehdr)) { | |
| 1373 lib_base = lib_base_diff + find_base_address(lib_fd, &elf_ehdr); | |
| 1374 print_debug("reading library %s @ 0x%lx [ 0x%lx ]\n", | |
| 1375 lib_name, lib_base, lib_base_diff); | |
| 1376 // while adding library mappings we need to use "base difference". | |
| 1377 if (! read_lib_segments(ph, lib_fd, &elf_ehdr, lib_base_diff)) { | |
| 1378 print_debug("can't read shared object's segments\n"); | |
| 1379 close(lib_fd); | |
| 1380 return false; | |
| 1381 } | |
| 1382 add_lib_info_fd(ph, lib_name, lib_fd, lib_base); | |
| 1383 // Map info is added for the library (lib_name) so | |
| 1384 // we need to re-sort it before calling the p_pdread. | |
| 1385 if (sort_map_array(ph) != true) | |
| 1386 return false; | |
| 1387 } else { | |
| 1388 print_debug("can't read ELF header for shared object %s\n", lib_name); | |
| 1389 close(lib_fd); | |
| 1390 // continue with other libraries... | |
| 1391 } | |
| 3960 | 1392 } |
| 8750 | 1393 } |
| 3960 | 1394 |
| 8750 | 1395 // read next link_map address |
| 1396 if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NEXT_OFFSET, | |
| 1397 &link_map_addr, sizeof(uintptr_t)) != PS_OK) { | |
| 1398 print_debug("can't read next link in link_map\n"); | |
| 1399 return false; | |
| 1400 } | |
| 1401 } | |
| 3960 | 1402 |
| 8750 | 1403 return true; |
| 3960 | 1404 } |
| 1405 | |
| 1406 // the one and only one exposed stuff from this file | |
| 1407 struct ps_prochandle* Pgrab_core(const char* exec_file, const char* core_file) { | |
| 8750 | 1408 ELF_EHDR core_ehdr; |
| 1409 ELF_EHDR exec_ehdr; | |
| 3960 | 1410 |
| 8750 | 1411 struct ps_prochandle* ph = (struct ps_prochandle*) calloc(1, sizeof(struct ps_prochandle)); |
| 1412 if (ph == NULL) { | |
| 1413 print_debug("cant allocate ps_prochandle\n"); | |
| 1414 return NULL; | |
| 1415 } | |
| 3960 | 1416 |
| 8750 | 1417 if ((ph->core = (struct core_data*) calloc(1, sizeof(struct core_data))) == NULL) { |
| 1418 free(ph); | |
| 1419 print_debug("can't allocate ps_prochandle\n"); | |
| 1420 return NULL; | |
| 1421 } | |
| 3960 | 1422 |
| 8750 | 1423 // initialize ph |
| 1424 ph->ops = &core_ops; | |
| 1425 ph->core->core_fd = -1; | |
| 1426 ph->core->exec_fd = -1; | |
| 1427 ph->core->interp_fd = -1; | |
| 1428 | |
| 1429 print_debug("exec: %s core: %s", exec_file, core_file); | |
| 3960 | 1430 |
| 8750 | 1431 // open the core file |
| 1432 if ((ph->core->core_fd = open(core_file, O_RDONLY)) < 0) { | |
| 1433 print_debug("can't open core file\n"); | |
| 1434 goto err; | |
| 1435 } | |
| 3960 | 1436 |
| 8750 | 1437 // read core file ELF header |
| 1438 if (read_elf_header(ph->core->core_fd, &core_ehdr) != true || core_ehdr.e_type != ET_CORE) { | |
| 1439 print_debug("core file is not a valid ELF ET_CORE file\n"); | |
| 1440 goto err; | |
| 1441 } | |
| 3960 | 1442 |
| 8750 | 1443 if ((ph->core->exec_fd = open(exec_file, O_RDONLY)) < 0) { |
| 1444 print_debug("can't open executable file\n"); | |
| 1445 goto err; | |
| 1446 } | |
| 3960 | 1447 |
| 8750 | 1448 if (read_elf_header(ph->core->exec_fd, &exec_ehdr) != true || exec_ehdr.e_type != ET_EXEC) { |
| 1449 print_debug("executable file is not a valid ELF ET_EXEC file\n"); | |
| 1450 goto err; | |
| 1451 } | |
| 3960 | 1452 |
| 8750 | 1453 // process core file segments |
| 1454 if (read_core_segments(ph, &core_ehdr) != true) | |
| 1455 goto err; | |
| 3960 | 1456 |
| 8750 | 1457 // process exec file segments |
| 1458 if (read_exec_segments(ph, &exec_ehdr) != true) | |
| 1459 goto err; | |
| 3960 | 1460 |
| 8750 | 1461 // exec file is also treated like a shared object for symbol search |
| 1462 if (add_lib_info_fd(ph, exec_file, ph->core->exec_fd, | |
| 1463 (uintptr_t)0 + find_base_address(ph->core->exec_fd, &exec_ehdr)) == NULL) | |
| 1464 goto err; | |
| 3960 | 1465 |
| 8750 | 1466 // allocate and sort maps into map_array, we need to do this |
| 1467 // here because read_shared_lib_info needs to read from debuggee | |
| 1468 // address space | |
| 1469 if (sort_map_array(ph) != true) | |
| 1470 goto err; | |
| 3960 | 1471 |
| 8750 | 1472 if (read_shared_lib_info(ph) != true) |
| 1473 goto err; | |
| 3960 | 1474 |
| 8750 | 1475 // sort again because we have added more mappings from shared objects |
| 1476 if (sort_map_array(ph) != true) | |
| 1477 goto err; | |
| 3960 | 1478 |
| 8750 | 1479 if (init_classsharing_workaround(ph) != true) |
| 1480 goto err; | |
| 3960 | 1481 |
| 8750 | 1482 print_debug("Leave Pgrab_core\n"); |
| 1483 return ph; | |
| 3960 | 1484 |
| 1485 err: | |
| 8750 | 1486 Prelease(ph); |
| 1487 return NULL; | |
| 3960 | 1488 } |
| 8750 | 1489 |
| 1490 #endif // __APPLE__ |