Wed, 02 Oct 2013 22:27:23 +0400
8025250: SA: Sync linux and bsd versions of ps_core file
Summary: linux/ps_core.c and bsd/ps_core.c share most of code, but it has different formatting, comments etc.
Reviewed-by: sla, minqi
never@3156 | 1 | /* |
minqi@4750 | 2 | * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
never@3156 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
never@3156 | 4 | * |
never@3156 | 5 | * This code is free software; you can redistribute it and/or modify it |
never@3156 | 6 | * under the terms of the GNU General Public License version 2 only, as |
never@3156 | 7 | * published by the Free Software Foundation. |
never@3156 | 8 | * |
never@3156 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
never@3156 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
never@3156 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
never@3156 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
never@3156 | 13 | * accompanied this code). |
never@3156 | 14 | * |
never@3156 | 15 | * You should have received a copy of the GNU General Public License version |
never@3156 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
never@3156 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
never@3156 | 18 | * |
never@3156 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
never@3156 | 20 | * or visit www.oracle.com if you need additional information or have any |
never@3156 | 21 | * questions. |
never@3156 | 22 | * |
never@3156 | 23 | */ |
never@3156 | 24 | |
never@3156 | 25 | #include <jni.h> |
never@3156 | 26 | #include <unistd.h> |
never@3156 | 27 | #include <fcntl.h> |
never@3156 | 28 | #include <string.h> |
never@3156 | 29 | #include <stdlib.h> |
never@3156 | 30 | #include <stddef.h> |
never@3156 | 31 | #include "libproc_impl.h" |
minqi@4750 | 32 | |
minqi@4750 | 33 | #ifdef __APPLE__ |
minqi@4750 | 34 | #include "sun_jvm_hotspot_debugger_amd64_AMD64ThreadContext.h" |
minqi@4750 | 35 | #endif |
never@3156 | 36 | |
never@3156 | 37 | // This file has the libproc implementation to read core files. |
never@3156 | 38 | // For live processes, refer to ps_proc.c. Portions of this is adapted |
never@3156 | 39 | // /modelled after Solaris libproc.so (in particular Pcore.c) |
never@3156 | 40 | |
never@3156 | 41 | //---------------------------------------------------------------------- |
never@3156 | 42 | // ps_prochandle cleanup helper functions |
never@3156 | 43 | |
never@3156 | 44 | // close all file descriptors |
minqi@4750 | 45 | static void close_files(struct ps_prochandle* ph) { |
minqi@4750 | 46 | lib_info* lib = NULL; |
dsamersoff@5832 | 47 | |
minqi@4750 | 48 | // close core file descriptor |
minqi@4750 | 49 | if (ph->core->core_fd >= 0) |
minqi@4750 | 50 | close(ph->core->core_fd); |
never@3156 | 51 | |
minqi@4750 | 52 | // close exec file descriptor |
minqi@4750 | 53 | if (ph->core->exec_fd >= 0) |
minqi@4750 | 54 | close(ph->core->exec_fd); |
never@3156 | 55 | |
minqi@4750 | 56 | // close interp file descriptor |
minqi@4750 | 57 | if (ph->core->interp_fd >= 0) |
minqi@4750 | 58 | close(ph->core->interp_fd); |
never@3156 | 59 | |
minqi@4750 | 60 | // close class share archive file |
minqi@4750 | 61 | if (ph->core->classes_jsa_fd >= 0) |
minqi@4750 | 62 | close(ph->core->classes_jsa_fd); |
never@3156 | 63 | |
minqi@4750 | 64 | // close all library file descriptors |
minqi@4750 | 65 | lib = ph->libs; |
minqi@4750 | 66 | while (lib) { |
minqi@4750 | 67 | int fd = lib->fd; |
minqi@4750 | 68 | if (fd >= 0 && fd != ph->core->exec_fd) { |
minqi@4750 | 69 | close(fd); |
minqi@4750 | 70 | } |
minqi@4750 | 71 | lib = lib->next; |
minqi@4750 | 72 | } |
never@3156 | 73 | } |
never@3156 | 74 | |
never@3156 | 75 | // clean all map_info stuff |
never@3156 | 76 | static void destroy_map_info(struct ps_prochandle* ph) { |
never@3156 | 77 | map_info* map = ph->core->maps; |
never@3156 | 78 | while (map) { |
minqi@4750 | 79 | map_info* next = map->next; |
minqi@4750 | 80 | free(map); |
minqi@4750 | 81 | map = next; |
never@3156 | 82 | } |
never@3156 | 83 | |
never@3156 | 84 | if (ph->core->map_array) { |
minqi@4750 | 85 | free(ph->core->map_array); |
never@3156 | 86 | } |
never@3156 | 87 | |
never@3156 | 88 | // Part of the class sharing workaround |
never@3156 | 89 | map = ph->core->class_share_maps; |
never@3156 | 90 | while (map) { |
minqi@4750 | 91 | map_info* next = map->next; |
minqi@4750 | 92 | free(map); |
minqi@4750 | 93 | map = next; |
never@3156 | 94 | } |
never@3156 | 95 | } |
never@3156 | 96 | |
never@3156 | 97 | // ps_prochandle operations |
never@3156 | 98 | static void core_release(struct ps_prochandle* ph) { |
minqi@4750 | 99 | if (ph->core) { |
minqi@4750 | 100 | close_files(ph); |
minqi@4750 | 101 | destroy_map_info(ph); |
minqi@4750 | 102 | free(ph->core); |
minqi@4750 | 103 | } |
never@3156 | 104 | } |
never@3156 | 105 | |
never@3156 | 106 | static map_info* allocate_init_map(int fd, off_t offset, uintptr_t vaddr, size_t memsz) { |
minqi@4750 | 107 | map_info* map; |
minqi@4750 | 108 | if ( (map = (map_info*) calloc(1, sizeof(map_info))) == NULL) { |
minqi@4750 | 109 | print_debug("can't allocate memory for map_info\n"); |
minqi@4750 | 110 | return NULL; |
minqi@4750 | 111 | } |
never@3156 | 112 | |
minqi@4750 | 113 | // initialize map |
minqi@4750 | 114 | map->fd = fd; |
minqi@4750 | 115 | map->offset = offset; |
minqi@4750 | 116 | map->vaddr = vaddr; |
minqi@4750 | 117 | map->memsz = memsz; |
minqi@4750 | 118 | return map; |
never@3156 | 119 | } |
never@3156 | 120 | |
never@3156 | 121 | // add map info with given fd, offset, vaddr and memsz |
never@3156 | 122 | static map_info* add_map_info(struct ps_prochandle* ph, int fd, off_t offset, |
never@3156 | 123 | uintptr_t vaddr, size_t memsz) { |
minqi@4750 | 124 | map_info* map; |
minqi@4750 | 125 | if ((map = allocate_init_map(fd, offset, vaddr, memsz)) == NULL) { |
minqi@4750 | 126 | return NULL; |
minqi@4750 | 127 | } |
never@3156 | 128 | |
minqi@4750 | 129 | // add this to map list |
minqi@4750 | 130 | map->next = ph->core->maps; |
minqi@4750 | 131 | ph->core->maps = map; |
minqi@4750 | 132 | ph->core->num_maps++; |
never@3156 | 133 | |
minqi@4750 | 134 | return map; |
never@3156 | 135 | } |
never@3156 | 136 | |
never@3156 | 137 | // Part of the class sharing workaround |
never@3156 | 138 | static map_info* add_class_share_map_info(struct ps_prochandle* ph, off_t offset, |
never@3156 | 139 | uintptr_t vaddr, size_t memsz) { |
minqi@4750 | 140 | map_info* map; |
minqi@4750 | 141 | if ((map = allocate_init_map(ph->core->classes_jsa_fd, |
minqi@4750 | 142 | offset, vaddr, memsz)) == NULL) { |
minqi@4750 | 143 | return NULL; |
minqi@4750 | 144 | } |
never@3156 | 145 | |
minqi@4750 | 146 | map->next = ph->core->class_share_maps; |
minqi@4750 | 147 | ph->core->class_share_maps = map; |
minqi@4750 | 148 | return map; |
never@3156 | 149 | } |
never@3156 | 150 | |
never@3156 | 151 | // Return the map_info for the given virtual address. We keep a sorted |
never@3156 | 152 | // array of pointers in ph->map_array, so we can binary search. |
dsamersoff@5832 | 153 | static map_info* core_lookup(struct ps_prochandle *ph, uintptr_t addr) { |
minqi@4750 | 154 | int mid, lo = 0, hi = ph->core->num_maps - 1; |
minqi@4750 | 155 | map_info *mp; |
never@3156 | 156 | |
minqi@4750 | 157 | while (hi - lo > 1) { |
minqi@4750 | 158 | mid = (lo + hi) / 2; |
minqi@4750 | 159 | if (addr >= ph->core->map_array[mid]->vaddr) { |
minqi@4750 | 160 | lo = mid; |
minqi@4750 | 161 | } else { |
minqi@4750 | 162 | hi = mid; |
minqi@4750 | 163 | } |
minqi@4750 | 164 | } |
never@3156 | 165 | |
minqi@4750 | 166 | if (addr < ph->core->map_array[hi]->vaddr) { |
minqi@4750 | 167 | mp = ph->core->map_array[lo]; |
minqi@4750 | 168 | } else { |
minqi@4750 | 169 | mp = ph->core->map_array[hi]; |
minqi@4750 | 170 | } |
never@3156 | 171 | |
minqi@4750 | 172 | if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz) { |
minqi@4750 | 173 | return (mp); |
minqi@4750 | 174 | } |
minqi@4750 | 175 | |
minqi@4750 | 176 | |
minqi@4750 | 177 | // Part of the class sharing workaround |
minqi@4750 | 178 | // Unfortunately, we have no way of detecting -Xshare state. |
minqi@4750 | 179 | // Check out the share maps atlast, if we don't find anywhere. |
minqi@4750 | 180 | // This is done this way so to avoid reading share pages |
minqi@4750 | 181 | // ahead of other normal maps. For eg. with -Xshare:off we don't |
minqi@4750 | 182 | // want to prefer class sharing data to data from core. |
minqi@4750 | 183 | mp = ph->core->class_share_maps; |
minqi@4750 | 184 | if (mp) { |
minqi@4750 | 185 | print_debug("can't locate map_info at 0x%lx, trying class share maps\n", addr); |
minqi@4750 | 186 | } |
minqi@4750 | 187 | while (mp) { |
minqi@4750 | 188 | if (addr >= mp->vaddr && addr < mp->vaddr + mp->memsz) { |
minqi@4750 | 189 | print_debug("located map_info at 0x%lx from class share maps\n", addr); |
never@3156 | 190 | return (mp); |
minqi@4750 | 191 | } |
minqi@4750 | 192 | mp = mp->next; |
minqi@4750 | 193 | } |
never@3156 | 194 | |
minqi@4750 | 195 | print_debug("can't locate map_info at 0x%lx\n", addr); |
minqi@4750 | 196 | return (NULL); |
never@3156 | 197 | } |
never@3156 | 198 | |
never@3156 | 199 | //--------------------------------------------------------------- |
never@3156 | 200 | // Part of the class sharing workaround: |
never@3156 | 201 | // |
sla@5061 | 202 | // With class sharing, pages are mapped from classes.jsa file. |
never@3156 | 203 | // The read-only class sharing pages are mapped as MAP_SHARED, |
never@3156 | 204 | // PROT_READ pages. These pages are not dumped into core dump. |
sla@5061 | 205 | // With this workaround, these pages are read from classes.jsa. |
never@3156 | 206 | |
never@3156 | 207 | // FIXME: !HACK ALERT! |
never@3156 | 208 | // The format of sharing achive file header is needed to read shared heap |
never@3156 | 209 | // file mappings. For now, I am hard coding portion of FileMapHeader here. |
never@3156 | 210 | // Refer to filemap.hpp. |
never@3156 | 211 | |
never@3156 | 212 | // FileMapHeader describes the shared space data in the file to be |
never@3156 | 213 | // mapped. This structure gets written to a file. It is not a class, |
never@3156 | 214 | // so that the compilers don't add any compiler-private data to it. |
never@3156 | 215 | |
never@3156 | 216 | #define NUM_SHARED_MAPS 4 |
never@3156 | 217 | |
never@3156 | 218 | // Refer to FileMapInfo::_current_version in filemap.hpp |
never@3156 | 219 | #define CURRENT_ARCHIVE_VERSION 1 |
never@3156 | 220 | |
never@3156 | 221 | struct FileMapHeader { |
never@3156 | 222 | int _magic; // identify file type. |
never@3156 | 223 | int _version; // (from enum, above.) |
never@3156 | 224 | size_t _alignment; // how shared archive should be aligned |
never@3156 | 225 | |
never@3156 | 226 | struct space_info { |
never@3156 | 227 | int _file_offset; // sizeof(this) rounded to vm page size |
never@3156 | 228 | char* _base; // copy-on-write base address |
never@3156 | 229 | size_t _capacity; // for validity checking |
never@3156 | 230 | size_t _used; // for setting space top on read |
never@3156 | 231 | |
never@3156 | 232 | // 4991491 NOTICE These are C++ bool's in filemap.hpp and must match up with |
dsamersoff@5832 | 233 | // the C type matching the C++ bool type on any given platform. |
dsamersoff@5832 | 234 | // We assume the corresponding C type is char but licensees |
dsamersoff@5832 | 235 | // may need to adjust the type of these fields. |
never@3156 | 236 | char _read_only; // read only space? |
never@3156 | 237 | char _allow_exec; // executable code in space? |
never@3156 | 238 | |
coleenp@4037 | 239 | } _space[NUM_SHARED_MAPS]; |
never@3156 | 240 | |
never@3156 | 241 | // Ignore the rest of the FileMapHeader. We don't need those fields here. |
never@3156 | 242 | }; |
never@3156 | 243 | |
never@3156 | 244 | static bool read_jboolean(struct ps_prochandle* ph, uintptr_t addr, jboolean* pvalue) { |
minqi@4750 | 245 | jboolean i; |
minqi@4750 | 246 | if (ps_pread(ph, (psaddr_t) addr, &i, sizeof(i)) == PS_OK) { |
minqi@4750 | 247 | *pvalue = i; |
minqi@4750 | 248 | return true; |
minqi@4750 | 249 | } else { |
minqi@4750 | 250 | return false; |
minqi@4750 | 251 | } |
never@3156 | 252 | } |
never@3156 | 253 | |
never@3156 | 254 | static bool read_pointer(struct ps_prochandle* ph, uintptr_t addr, uintptr_t* pvalue) { |
minqi@4750 | 255 | uintptr_t uip; |
minqi@4750 | 256 | if (ps_pread(ph, (psaddr_t) addr, (char *)&uip, sizeof(uip)) == PS_OK) { |
minqi@4750 | 257 | *pvalue = uip; |
minqi@4750 | 258 | return true; |
minqi@4750 | 259 | } else { |
minqi@4750 | 260 | return false; |
minqi@4750 | 261 | } |
never@3156 | 262 | } |
never@3156 | 263 | |
never@3156 | 264 | // used to read strings from debuggee |
never@3156 | 265 | static bool read_string(struct ps_prochandle* ph, uintptr_t addr, char* buf, size_t size) { |
minqi@4750 | 266 | size_t i = 0; |
minqi@4750 | 267 | char c = ' '; |
never@3156 | 268 | |
minqi@4750 | 269 | while (c != '\0') { |
minqi@4750 | 270 | if (ps_pread(ph, (psaddr_t) addr, &c, sizeof(char)) != PS_OK) { |
minqi@4750 | 271 | return false; |
minqi@4750 | 272 | } |
minqi@4750 | 273 | if (i < size - 1) { |
minqi@4750 | 274 | buf[i] = c; |
minqi@4750 | 275 | } else { |
minqi@4750 | 276 | // smaller buffer |
minqi@4750 | 277 | return false; |
minqi@4750 | 278 | } |
minqi@4750 | 279 | i++; addr++; |
minqi@4750 | 280 | } |
minqi@4750 | 281 | buf[i] = '\0'; |
minqi@4750 | 282 | return true; |
never@3156 | 283 | } |
never@3156 | 284 | |
minqi@4750 | 285 | #ifdef __APPLE__ |
minqi@4750 | 286 | #define USE_SHARED_SPACES_SYM "_UseSharedSpaces" |
minqi@4750 | 287 | // mangled name of Arguments::SharedArchivePath |
minqi@4750 | 288 | #define SHARED_ARCHIVE_PATH_SYM "_ZN9Arguments17SharedArchivePathE" |
dsamersoff@5832 | 289 | #define LIBJVM_NAME "/libjvm.dylib" |
minqi@4750 | 290 | #else |
never@3156 | 291 | #define USE_SHARED_SPACES_SYM "UseSharedSpaces" |
never@3156 | 292 | // mangled name of Arguments::SharedArchivePath |
minqi@4750 | 293 | #define SHARED_ARCHIVE_PATH_SYM "__ZN9Arguments17SharedArchivePathE" |
dsamersoff@5832 | 294 | #define LIBJVM_NAME "/libjvm.so" |
minqi@4750 | 295 | #endif // __APPLE_ |
never@3156 | 296 | |
never@3156 | 297 | static bool init_classsharing_workaround(struct ps_prochandle* ph) { |
minqi@4750 | 298 | int m; |
minqi@4750 | 299 | size_t n; |
minqi@4750 | 300 | lib_info* lib = ph->libs; |
minqi@4750 | 301 | while (lib != NULL) { |
minqi@4750 | 302 | // we are iterating over shared objects from the core dump. look for |
sla@5061 | 303 | // libjvm.so. |
minqi@4750 | 304 | const char *jvm_name = 0; |
dsamersoff@5832 | 305 | if ((jvm_name = strstr(lib->name, LIBJVM_NAME)) != 0) { |
minqi@4750 | 306 | char classes_jsa[PATH_MAX]; |
minqi@4750 | 307 | struct FileMapHeader header; |
minqi@4750 | 308 | int fd = -1; |
minqi@4750 | 309 | uintptr_t base = 0, useSharedSpacesAddr = 0; |
minqi@4750 | 310 | uintptr_t sharedArchivePathAddrAddr = 0, sharedArchivePathAddr = 0; |
minqi@4750 | 311 | jboolean useSharedSpaces = 0; |
never@3156 | 312 | |
minqi@4750 | 313 | memset(classes_jsa, 0, sizeof(classes_jsa)); |
minqi@4750 | 314 | jvm_name = lib->name; |
minqi@4750 | 315 | useSharedSpacesAddr = lookup_symbol(ph, jvm_name, USE_SHARED_SPACES_SYM); |
minqi@4750 | 316 | if (useSharedSpacesAddr == 0) { |
minqi@4750 | 317 | print_debug("can't lookup 'UseSharedSpaces' flag\n"); |
minqi@4750 | 318 | return false; |
minqi@4750 | 319 | } |
never@3156 | 320 | |
minqi@4750 | 321 | // Hotspot vm types are not exported to build this library. So |
minqi@4750 | 322 | // using equivalent type jboolean to read the value of |
minqi@4750 | 323 | // UseSharedSpaces which is same as hotspot type "bool". |
minqi@4750 | 324 | if (read_jboolean(ph, useSharedSpacesAddr, &useSharedSpaces) != true) { |
minqi@4750 | 325 | print_debug("can't read the value of 'UseSharedSpaces' flag\n"); |
minqi@4750 | 326 | return false; |
minqi@4750 | 327 | } |
never@3156 | 328 | |
minqi@4750 | 329 | if ((int)useSharedSpaces == 0) { |
minqi@4750 | 330 | print_debug("UseSharedSpaces is false, assuming -Xshare:off!\n"); |
minqi@4750 | 331 | return true; |
minqi@4750 | 332 | } |
never@3156 | 333 | |
minqi@4750 | 334 | sharedArchivePathAddrAddr = lookup_symbol(ph, jvm_name, SHARED_ARCHIVE_PATH_SYM); |
minqi@4750 | 335 | if (sharedArchivePathAddrAddr == 0) { |
minqi@4750 | 336 | print_debug("can't lookup shared archive path symbol\n"); |
minqi@4750 | 337 | return false; |
minqi@4750 | 338 | } |
never@3156 | 339 | |
minqi@4750 | 340 | if (read_pointer(ph, sharedArchivePathAddrAddr, &sharedArchivePathAddr) != true) { |
minqi@4750 | 341 | print_debug("can't read shared archive path pointer\n"); |
minqi@4750 | 342 | return false; |
minqi@4750 | 343 | } |
never@3156 | 344 | |
minqi@4750 | 345 | if (read_string(ph, sharedArchivePathAddr, classes_jsa, sizeof(classes_jsa)) != true) { |
minqi@4750 | 346 | print_debug("can't read shared archive path value\n"); |
minqi@4750 | 347 | return false; |
minqi@4750 | 348 | } |
never@3156 | 349 | |
minqi@4750 | 350 | print_debug("looking for %s\n", classes_jsa); |
minqi@4750 | 351 | // open the class sharing archive file |
minqi@4750 | 352 | fd = pathmap_open(classes_jsa); |
minqi@4750 | 353 | if (fd < 0) { |
minqi@4750 | 354 | print_debug("can't open %s!\n", classes_jsa); |
minqi@4750 | 355 | ph->core->classes_jsa_fd = -1; |
minqi@4750 | 356 | return false; |
minqi@4750 | 357 | } else { |
minqi@4750 | 358 | print_debug("opened %s\n", classes_jsa); |
minqi@4750 | 359 | } |
never@3156 | 360 | |
minqi@4750 | 361 | // read FileMapHeader from the file |
minqi@4750 | 362 | memset(&header, 0, sizeof(struct FileMapHeader)); |
minqi@4750 | 363 | if ((n = read(fd, &header, sizeof(struct FileMapHeader))) |
minqi@4750 | 364 | != sizeof(struct FileMapHeader)) { |
minqi@4750 | 365 | print_debug("can't read shared archive file map header from %s\n", classes_jsa); |
minqi@4750 | 366 | close(fd); |
minqi@4750 | 367 | return false; |
minqi@4750 | 368 | } |
never@3156 | 369 | |
minqi@4750 | 370 | // check file magic |
minqi@4750 | 371 | if (header._magic != 0xf00baba2) { |
minqi@4750 | 372 | print_debug("%s has bad shared archive file magic number 0x%x, expecing 0xf00baba2\n", |
minqi@4750 | 373 | classes_jsa, header._magic); |
minqi@4750 | 374 | close(fd); |
minqi@4750 | 375 | return false; |
minqi@4750 | 376 | } |
never@3156 | 377 | |
minqi@4750 | 378 | // check version |
minqi@4750 | 379 | if (header._version != CURRENT_ARCHIVE_VERSION) { |
minqi@4750 | 380 | print_debug("%s has wrong shared archive file version %d, expecting %d\n", |
minqi@4750 | 381 | classes_jsa, header._version, CURRENT_ARCHIVE_VERSION); |
minqi@4750 | 382 | close(fd); |
minqi@4750 | 383 | return false; |
minqi@4750 | 384 | } |
never@3156 | 385 | |
minqi@4750 | 386 | ph->core->classes_jsa_fd = fd; |
sla@5061 | 387 | // add read-only maps from classes.jsa to the list of maps |
minqi@4750 | 388 | for (m = 0; m < NUM_SHARED_MAPS; m++) { |
minqi@4750 | 389 | if (header._space[m]._read_only) { |
minqi@4750 | 390 | base = (uintptr_t) header._space[m]._base; |
minqi@4750 | 391 | // no need to worry about the fractional pages at-the-end. |
minqi@4750 | 392 | // possible fractional pages are handled by core_read_data. |
minqi@4750 | 393 | add_class_share_map_info(ph, (off_t) header._space[m]._file_offset, |
minqi@4750 | 394 | base, (size_t) header._space[m]._used); |
minqi@4750 | 395 | print_debug("added a share archive map at 0x%lx\n", base); |
minqi@4750 | 396 | } |
never@3156 | 397 | } |
minqi@4750 | 398 | return true; |
dsamersoff@5832 | 399 | } |
dsamersoff@5832 | 400 | lib = lib->next; |
minqi@4750 | 401 | } |
minqi@4750 | 402 | return true; |
never@3156 | 403 | } |
never@3156 | 404 | |
never@3156 | 405 | //--------------------------------------------------------------------------- |
never@3156 | 406 | // functions to handle map_info |
never@3156 | 407 | |
never@3156 | 408 | // Order mappings based on virtual address. We use this function as the |
never@3156 | 409 | // callback for sorting the array of map_info pointers. |
never@3156 | 410 | static int core_cmp_mapping(const void *lhsp, const void *rhsp) |
never@3156 | 411 | { |
minqi@4750 | 412 | const map_info *lhs = *((const map_info **)lhsp); |
minqi@4750 | 413 | const map_info *rhs = *((const map_info **)rhsp); |
never@3156 | 414 | |
minqi@4750 | 415 | if (lhs->vaddr == rhs->vaddr) { |
minqi@4750 | 416 | return (0); |
minqi@4750 | 417 | } |
never@3156 | 418 | |
minqi@4750 | 419 | return (lhs->vaddr < rhs->vaddr ? -1 : 1); |
never@3156 | 420 | } |
never@3156 | 421 | |
never@3156 | 422 | // we sort map_info by starting virtual address so that we can do |
never@3156 | 423 | // binary search to read from an address. |
never@3156 | 424 | static bool sort_map_array(struct ps_prochandle* ph) { |
minqi@4750 | 425 | size_t num_maps = ph->core->num_maps; |
minqi@4750 | 426 | map_info* map = ph->core->maps; |
minqi@4750 | 427 | int i = 0; |
never@3156 | 428 | |
minqi@4750 | 429 | // allocate map_array |
minqi@4750 | 430 | map_info** array; |
minqi@4750 | 431 | if ( (array = (map_info**) malloc(sizeof(map_info*) * num_maps)) == NULL) { |
dsamersoff@5832 | 432 | print_debug("can't allocate memory for map array\n"); |
dsamersoff@5832 | 433 | return false; |
minqi@4750 | 434 | } |
never@3156 | 435 | |
minqi@4750 | 436 | // add maps to array |
minqi@4750 | 437 | while (map) { |
minqi@4750 | 438 | array[i] = map; |
minqi@4750 | 439 | i++; |
minqi@4750 | 440 | map = map->next; |
minqi@4750 | 441 | } |
never@3156 | 442 | |
minqi@4750 | 443 | // sort is called twice. If this is second time, clear map array |
minqi@4750 | 444 | if (ph->core->map_array) { |
minqi@4750 | 445 | free(ph->core->map_array); |
minqi@4750 | 446 | } |
minqi@4750 | 447 | ph->core->map_array = array; |
minqi@4750 | 448 | // sort the map_info array by base virtual address. |
minqi@4750 | 449 | qsort(ph->core->map_array, ph->core->num_maps, sizeof (map_info*), |
dsamersoff@5832 | 450 | core_cmp_mapping); |
never@3156 | 451 | |
minqi@4750 | 452 | // print map |
minqi@4750 | 453 | if (is_debug()) { |
minqi@4750 | 454 | int j = 0; |
minqi@4750 | 455 | print_debug("---- sorted virtual address map ----\n"); |
minqi@4750 | 456 | for (j = 0; j < ph->core->num_maps; j++) { |
minqi@4750 | 457 | print_debug("base = 0x%lx\tsize = %d\n", ph->core->map_array[j]->vaddr, |
dsamersoff@5832 | 458 | ph->core->map_array[j]->memsz); |
minqi@4750 | 459 | } |
minqi@4750 | 460 | } |
never@3156 | 461 | |
minqi@4750 | 462 | return true; |
never@3156 | 463 | } |
never@3156 | 464 | |
never@3156 | 465 | #ifndef MIN |
never@3156 | 466 | #define MIN(x, y) (((x) < (y))? (x): (y)) |
never@3156 | 467 | #endif |
never@3156 | 468 | |
never@3156 | 469 | static bool core_read_data(struct ps_prochandle* ph, uintptr_t addr, char *buf, size_t size) { |
never@3156 | 470 | ssize_t resid = size; |
never@3156 | 471 | int page_size=sysconf(_SC_PAGE_SIZE); |
never@3156 | 472 | while (resid != 0) { |
never@3156 | 473 | map_info *mp = core_lookup(ph, addr); |
never@3156 | 474 | uintptr_t mapoff; |
never@3156 | 475 | ssize_t len, rem; |
never@3156 | 476 | off_t off; |
never@3156 | 477 | int fd; |
never@3156 | 478 | |
minqi@4750 | 479 | if (mp == NULL) { |
never@3156 | 480 | break; /* No mapping for this address */ |
minqi@4750 | 481 | } |
never@3156 | 482 | |
never@3156 | 483 | fd = mp->fd; |
never@3156 | 484 | mapoff = addr - mp->vaddr; |
never@3156 | 485 | len = MIN(resid, mp->memsz - mapoff); |
never@3156 | 486 | off = mp->offset + mapoff; |
never@3156 | 487 | |
minqi@4750 | 488 | if ((len = pread(fd, buf, len, off)) <= 0) { |
never@3156 | 489 | break; |
minqi@4750 | 490 | } |
never@3156 | 491 | |
never@3156 | 492 | resid -= len; |
never@3156 | 493 | addr += len; |
never@3156 | 494 | buf = (char *)buf + len; |
never@3156 | 495 | |
never@3156 | 496 | // mappings always start at page boundary. But, may end in fractional |
never@3156 | 497 | // page. fill zeros for possible fractional page at the end of a mapping. |
never@3156 | 498 | rem = mp->memsz % page_size; |
never@3156 | 499 | if (rem > 0) { |
never@3156 | 500 | rem = page_size - rem; |
never@3156 | 501 | len = MIN(resid, rem); |
never@3156 | 502 | resid -= len; |
never@3156 | 503 | addr += len; |
never@3156 | 504 | // we are not assuming 'buf' to be zero initialized. |
never@3156 | 505 | memset(buf, 0, len); |
never@3156 | 506 | buf += len; |
never@3156 | 507 | } |
never@3156 | 508 | } |
never@3156 | 509 | |
never@3156 | 510 | if (resid) { |
never@3156 | 511 | print_debug("core read failed for %d byte(s) @ 0x%lx (%d more bytes)\n", |
never@3156 | 512 | size, addr, resid); |
never@3156 | 513 | return false; |
never@3156 | 514 | } else { |
never@3156 | 515 | return true; |
never@3156 | 516 | } |
never@3156 | 517 | } |
never@3156 | 518 | |
never@3156 | 519 | // null implementation for write |
never@3156 | 520 | static bool core_write_data(struct ps_prochandle* ph, |
never@3156 | 521 | uintptr_t addr, const char *buf , size_t size) { |
never@3156 | 522 | return false; |
never@3156 | 523 | } |
never@3156 | 524 | |
never@3156 | 525 | static bool core_get_lwp_regs(struct ps_prochandle* ph, lwpid_t lwp_id, |
never@3156 | 526 | struct reg* regs) { |
minqi@4750 | 527 | // for core we have cached the lwp regs after segment parsed |
minqi@4750 | 528 | sa_thread_info* thr = ph->threads; |
never@3156 | 529 | while (thr) { |
never@3156 | 530 | if (thr->lwp_id == lwp_id) { |
never@3156 | 531 | memcpy(regs, &thr->regs, sizeof(struct reg)); |
never@3156 | 532 | return true; |
never@3156 | 533 | } |
never@3156 | 534 | thr = thr->next; |
never@3156 | 535 | } |
never@3156 | 536 | return false; |
never@3156 | 537 | } |
never@3156 | 538 | |
minqi@4750 | 539 | static bool core_get_lwp_info(struct ps_prochandle *ph, lwpid_t id, void *info) { |
never@3156 | 540 | print_debug("core_get_lwp_info not implemented\n"); |
never@3156 | 541 | return false; |
never@3156 | 542 | } |
never@3156 | 543 | |
never@3156 | 544 | static ps_prochandle_ops core_ops = { |
never@3156 | 545 | .release= core_release, |
never@3156 | 546 | .p_pread= core_read_data, |
never@3156 | 547 | .p_pwrite= core_write_data, |
never@3156 | 548 | .get_lwp_regs= core_get_lwp_regs, |
never@3156 | 549 | .get_lwp_info= core_get_lwp_info |
never@3156 | 550 | }; |
never@3156 | 551 | |
minqi@4750 | 552 | // from this point, mainly two blocks divided by def __APPLE__ |
minqi@4750 | 553 | // one for Macosx, the other for regular Bsd |
minqi@4750 | 554 | |
minqi@4750 | 555 | #ifdef __APPLE__ |
minqi@4750 | 556 | |
minqi@4750 | 557 | void print_thread(sa_thread_info *threadinfo) { |
minqi@4750 | 558 | print_debug("thread added: %d\n", threadinfo->lwp_id); |
minqi@4750 | 559 | print_debug("registers:\n"); |
minqi@4750 | 560 | print_debug(" r_r15: 0x%" PRIx64 "\n", threadinfo->regs.r_r15); |
minqi@4750 | 561 | print_debug(" r_r14: 0x%" PRIx64 "\n", threadinfo->regs.r_r14); |
minqi@4750 | 562 | print_debug(" r_r13: 0x%" PRIx64 "\n", threadinfo->regs.r_r13); |
minqi@4750 | 563 | print_debug(" r_r12: 0x%" PRIx64 "\n", threadinfo->regs.r_r12); |
minqi@4750 | 564 | print_debug(" r_r11: 0x%" PRIx64 "\n", threadinfo->regs.r_r11); |
minqi@4750 | 565 | print_debug(" r_r10: 0x%" PRIx64 "\n", threadinfo->regs.r_r10); |
minqi@4750 | 566 | print_debug(" r_r9: 0x%" PRIx64 "\n", threadinfo->regs.r_r9); |
minqi@4750 | 567 | print_debug(" r_r8: 0x%" PRIx64 "\n", threadinfo->regs.r_r8); |
minqi@4750 | 568 | print_debug(" r_rdi: 0x%" PRIx64 "\n", threadinfo->regs.r_rdi); |
minqi@4750 | 569 | print_debug(" r_rsi: 0x%" PRIx64 "\n", threadinfo->regs.r_rsi); |
minqi@4750 | 570 | print_debug(" r_rbp: 0x%" PRIx64 "\n", threadinfo->regs.r_rbp); |
minqi@4750 | 571 | print_debug(" r_rbx: 0x%" PRIx64 "\n", threadinfo->regs.r_rbx); |
minqi@4750 | 572 | print_debug(" r_rdx: 0x%" PRIx64 "\n", threadinfo->regs.r_rdx); |
minqi@4750 | 573 | print_debug(" r_rcx: 0x%" PRIx64 "\n", threadinfo->regs.r_rcx); |
minqi@4750 | 574 | print_debug(" r_rax: 0x%" PRIx64 "\n", threadinfo->regs.r_rax); |
minqi@4750 | 575 | print_debug(" r_fs: 0x%" PRIx32 "\n", threadinfo->regs.r_fs); |
minqi@4750 | 576 | print_debug(" r_gs: 0x%" PRIx32 "\n", threadinfo->regs.r_gs); |
minqi@4750 | 577 | print_debug(" r_rip 0x%" PRIx64 "\n", threadinfo->regs.r_rip); |
minqi@4750 | 578 | print_debug(" r_cs: 0x%" PRIx64 "\n", threadinfo->regs.r_cs); |
minqi@4750 | 579 | print_debug(" r_rsp: 0x%" PRIx64 "\n", threadinfo->regs.r_rsp); |
minqi@4750 | 580 | print_debug(" r_rflags: 0x%" PRIx64 "\n", threadinfo->regs.r_rflags); |
minqi@4750 | 581 | } |
minqi@4750 | 582 | |
minqi@4750 | 583 | // read all segments64 commands from core file |
minqi@4750 | 584 | // read all thread commands from core file |
minqi@4750 | 585 | static bool read_core_segments(struct ps_prochandle* ph) { |
minqi@4750 | 586 | int i = 0; |
minqi@4750 | 587 | int num_threads = 0; |
minqi@4750 | 588 | int fd = ph->core->core_fd; |
minqi@4750 | 589 | off_t offset = 0; |
minqi@4750 | 590 | mach_header_64 fhead; |
minqi@4750 | 591 | load_command lcmd; |
minqi@4750 | 592 | segment_command_64 segcmd; |
minqi@4750 | 593 | // thread_command thrcmd; |
minqi@4750 | 594 | |
minqi@4750 | 595 | lseek(fd, offset, SEEK_SET); |
minqi@4750 | 596 | if(read(fd, (void *)&fhead, sizeof(mach_header_64)) != sizeof(mach_header_64)) { |
minqi@4750 | 597 | goto err; |
minqi@4750 | 598 | } |
minqi@4750 | 599 | print_debug("total commands: %d\n", fhead.ncmds); |
minqi@4750 | 600 | offset += sizeof(mach_header_64); |
minqi@4750 | 601 | for (i = 0; i < fhead.ncmds; i++) { |
minqi@4750 | 602 | lseek(fd, offset, SEEK_SET); |
minqi@4750 | 603 | if (read(fd, (void *)&lcmd, sizeof(load_command)) != sizeof(load_command)) { |
minqi@4750 | 604 | goto err; |
minqi@4750 | 605 | } |
minqi@4750 | 606 | offset += lcmd.cmdsize; // next command position |
minqi@4750 | 607 | if (lcmd.cmd == LC_SEGMENT_64) { |
minqi@4750 | 608 | lseek(fd, -sizeof(load_command), SEEK_CUR); |
minqi@4750 | 609 | if (read(fd, (void *)&segcmd, sizeof(segment_command_64)) != sizeof(segment_command_64)) { |
minqi@4750 | 610 | print_debug("failed to read LC_SEGMENT_64 i = %d!\n", i); |
minqi@4750 | 611 | goto err; |
minqi@4750 | 612 | } |
minqi@4750 | 613 | if (add_map_info(ph, fd, segcmd.fileoff, segcmd.vmaddr, segcmd.vmsize) == NULL) { |
minqi@4750 | 614 | print_debug("Failed to add map_info at i = %d\n", i); |
minqi@4750 | 615 | goto err; |
minqi@4750 | 616 | } |
minqi@4750 | 617 | print_debug("segment added: %" PRIu64 " 0x%" PRIx64 " %d\n", |
minqi@4750 | 618 | segcmd.fileoff, segcmd.vmaddr, segcmd.vmsize); |
minqi@4750 | 619 | } else if (lcmd.cmd == LC_THREAD || lcmd.cmd == LC_UNIXTHREAD) { |
minqi@4750 | 620 | typedef struct thread_fc { |
minqi@4750 | 621 | uint32_t flavor; |
minqi@4750 | 622 | uint32_t count; |
minqi@4750 | 623 | } thread_fc; |
minqi@4750 | 624 | thread_fc fc; |
minqi@4750 | 625 | uint32_t size = sizeof(load_command); |
minqi@4750 | 626 | while (size < lcmd.cmdsize) { |
minqi@4750 | 627 | if (read(fd, (void *)&fc, sizeof(thread_fc)) != sizeof(thread_fc)) { |
minqi@4750 | 628 | printf("Reading flavor, count failed.\n"); |
minqi@4750 | 629 | goto err; |
minqi@4750 | 630 | } |
minqi@4750 | 631 | size += sizeof(thread_fc); |
minqi@4750 | 632 | if (fc.flavor == x86_THREAD_STATE) { |
minqi@4750 | 633 | x86_thread_state_t thrstate; |
minqi@4750 | 634 | if (read(fd, (void *)&thrstate, sizeof(x86_thread_state_t)) != sizeof(x86_thread_state_t)) { |
minqi@4750 | 635 | printf("Reading flavor, count failed.\n"); |
minqi@4750 | 636 | goto err; |
minqi@4750 | 637 | } |
minqi@4750 | 638 | size += sizeof(x86_thread_state_t); |
minqi@4750 | 639 | // create thread info list, update lwp_id later |
minqi@4750 | 640 | sa_thread_info* newthr = add_thread_info(ph, (pthread_t) -1, (lwpid_t) num_threads++); |
minqi@4750 | 641 | if (newthr == NULL) { |
minqi@4750 | 642 | printf("create thread_info failed\n"); |
minqi@4750 | 643 | goto err; |
minqi@4750 | 644 | } |
minqi@4750 | 645 | |
minqi@4750 | 646 | // note __DARWIN_UNIX03 depengs on other definitions |
minqi@4750 | 647 | #if __DARWIN_UNIX03 |
minqi@4750 | 648 | #define get_register_v(regst, regname) \ |
minqi@4750 | 649 | regst.uts.ts64.__##regname |
minqi@4750 | 650 | #else |
minqi@4750 | 651 | #define get_register_v(regst, regname) \ |
minqi@4750 | 652 | regst.uts.ts64.##regname |
minqi@4750 | 653 | #endif // __DARWIN_UNIX03 |
minqi@4750 | 654 | newthr->regs.r_rax = get_register_v(thrstate, rax); |
minqi@4750 | 655 | newthr->regs.r_rbx = get_register_v(thrstate, rbx); |
minqi@4750 | 656 | newthr->regs.r_rcx = get_register_v(thrstate, rcx); |
minqi@4750 | 657 | newthr->regs.r_rdx = get_register_v(thrstate, rdx); |
minqi@4750 | 658 | newthr->regs.r_rdi = get_register_v(thrstate, rdi); |
minqi@4750 | 659 | newthr->regs.r_rsi = get_register_v(thrstate, rsi); |
minqi@4750 | 660 | newthr->regs.r_rbp = get_register_v(thrstate, rbp); |
minqi@4750 | 661 | newthr->regs.r_rsp = get_register_v(thrstate, rsp); |
minqi@4750 | 662 | newthr->regs.r_r8 = get_register_v(thrstate, r8); |
minqi@4750 | 663 | newthr->regs.r_r9 = get_register_v(thrstate, r9); |
minqi@4750 | 664 | newthr->regs.r_r10 = get_register_v(thrstate, r10); |
minqi@4750 | 665 | newthr->regs.r_r11 = get_register_v(thrstate, r11); |
minqi@4750 | 666 | newthr->regs.r_r12 = get_register_v(thrstate, r12); |
minqi@4750 | 667 | newthr->regs.r_r13 = get_register_v(thrstate, r13); |
minqi@4750 | 668 | newthr->regs.r_r14 = get_register_v(thrstate, r14); |
minqi@4750 | 669 | newthr->regs.r_r15 = get_register_v(thrstate, r15); |
minqi@4750 | 670 | newthr->regs.r_rip = get_register_v(thrstate, rip); |
minqi@4750 | 671 | newthr->regs.r_rflags = get_register_v(thrstate, rflags); |
minqi@4750 | 672 | newthr->regs.r_cs = get_register_v(thrstate, cs); |
minqi@4750 | 673 | newthr->regs.r_fs = get_register_v(thrstate, fs); |
minqi@4750 | 674 | newthr->regs.r_gs = get_register_v(thrstate, gs); |
minqi@4750 | 675 | print_thread(newthr); |
minqi@4750 | 676 | } else if (fc.flavor == x86_FLOAT_STATE) { |
minqi@4750 | 677 | x86_float_state_t flstate; |
minqi@4750 | 678 | if (read(fd, (void *)&flstate, sizeof(x86_float_state_t)) != sizeof(x86_float_state_t)) { |
minqi@4750 | 679 | print_debug("Reading flavor, count failed.\n"); |
minqi@4750 | 680 | goto err; |
minqi@4750 | 681 | } |
minqi@4750 | 682 | size += sizeof(x86_float_state_t); |
minqi@4750 | 683 | } else if (fc.flavor == x86_EXCEPTION_STATE) { |
minqi@4750 | 684 | x86_exception_state_t excpstate; |
minqi@4750 | 685 | if (read(fd, (void *)&excpstate, sizeof(x86_exception_state_t)) != sizeof(x86_exception_state_t)) { |
minqi@4750 | 686 | printf("Reading flavor, count failed.\n"); |
minqi@4750 | 687 | goto err; |
minqi@4750 | 688 | } |
minqi@4750 | 689 | size += sizeof(x86_exception_state_t); |
minqi@4750 | 690 | } |
minqi@4750 | 691 | } |
minqi@4750 | 692 | } |
minqi@4750 | 693 | } |
minqi@4750 | 694 | return true; |
minqi@4750 | 695 | err: |
minqi@4750 | 696 | return false; |
minqi@4750 | 697 | } |
minqi@4750 | 698 | |
minqi@4750 | 699 | /**local function **/ |
minqi@4750 | 700 | bool exists(const char *fname) |
minqi@4750 | 701 | { |
minqi@4750 | 702 | int fd; |
minqi@4750 | 703 | if ((fd = open(fname, O_RDONLY)) > 0) { |
minqi@4750 | 704 | close(fd); |
minqi@4750 | 705 | return true; |
minqi@4750 | 706 | } |
minqi@4750 | 707 | return false; |
minqi@4750 | 708 | } |
minqi@4750 | 709 | |
minqi@4750 | 710 | // we check: 1. lib |
minqi@4750 | 711 | // 2. lib/server |
minqi@4750 | 712 | // 3. jre/lib |
minqi@4750 | 713 | // 4. jre/lib/server |
minqi@4750 | 714 | // from: 1. exe path |
minqi@4750 | 715 | // 2. JAVA_HOME |
minqi@4750 | 716 | // 3. DYLD_LIBRARY_PATH |
minqi@4750 | 717 | static bool get_real_path(struct ps_prochandle* ph, char *rpath) { |
minqi@4750 | 718 | /** check if they exist in JAVA ***/ |
minqi@4750 | 719 | char* execname = ph->core->exec_path; |
minqi@4750 | 720 | char filepath[4096]; |
minqi@4750 | 721 | char* filename = strrchr(rpath, '/'); // like /libjvm.dylib |
minqi@4750 | 722 | if (filename == NULL) { |
minqi@4750 | 723 | return false; |
minqi@4750 | 724 | } |
minqi@4750 | 725 | |
minqi@4750 | 726 | char* posbin = strstr(execname, "/bin/java"); |
minqi@4750 | 727 | if (posbin != NULL) { |
minqi@4750 | 728 | memcpy(filepath, execname, posbin - execname); // not include trailing '/' |
minqi@4750 | 729 | filepath[posbin - execname] = '\0'; |
minqi@4750 | 730 | } else { |
minqi@4750 | 731 | char* java_home = getenv("JAVA_HOME"); |
minqi@4750 | 732 | if (java_home != NULL) { |
minqi@4750 | 733 | strcpy(filepath, java_home); |
minqi@4750 | 734 | } else { |
minqi@4750 | 735 | char* dyldpath = getenv("DYLD_LIBRARY_PATH"); |
minqi@4750 | 736 | char* dypath = strtok(dyldpath, ":"); |
minqi@4750 | 737 | while (dypath != NULL) { |
minqi@4750 | 738 | strcpy(filepath, dypath); |
minqi@4750 | 739 | strcat(filepath, filename); |
minqi@4750 | 740 | if (exists(filepath)) { |
minqi@4750 | 741 | strcpy(rpath, filepath); |
minqi@4750 | 742 | return true; |
minqi@4750 | 743 | } |
minqi@4750 | 744 | dypath = strtok(dyldpath, ":"); |
minqi@4750 | 745 | } |
minqi@4750 | 746 | // not found |
minqi@4750 | 747 | return false; |
minqi@4750 | 748 | } |
minqi@4750 | 749 | } |
minqi@4750 | 750 | // for exec and java_home, jdkpath now is filepath |
minqi@4750 | 751 | size_t filepath_base_size = strlen(filepath); |
minqi@4750 | 752 | |
minqi@4750 | 753 | // first try /lib/ and /lib/server |
minqi@4750 | 754 | strcat(filepath, "/lib"); |
minqi@4750 | 755 | strcat(filepath, filename); |
minqi@4750 | 756 | if (exists(filepath)) { |
minqi@4750 | 757 | strcpy(rpath, filepath); |
minqi@4750 | 758 | return true; |
minqi@4750 | 759 | } |
minqi@4750 | 760 | char* pos = strstr(filepath, filename); // like /libjvm.dylib |
minqi@4750 | 761 | *pos = '\0'; |
minqi@4750 | 762 | strcat(filepath, "/server"); |
minqi@4750 | 763 | strcat(filepath, filename); |
minqi@4750 | 764 | if (exists(filepath)) { |
minqi@4750 | 765 | strcpy(rpath, filepath); |
minqi@4750 | 766 | return true; |
minqi@4750 | 767 | } |
minqi@4750 | 768 | |
minqi@4750 | 769 | // then try /jre/lib/ and /jre/lib/server |
minqi@4750 | 770 | filepath[filepath_base_size] = '\0'; |
minqi@4750 | 771 | strcat(filepath, "/jre/lib"); |
minqi@4750 | 772 | strcat(filepath, filename); |
minqi@4750 | 773 | if (exists(filepath)) { |
minqi@4750 | 774 | strcpy(rpath, filepath); |
minqi@4750 | 775 | return true; |
minqi@4750 | 776 | } |
minqi@4750 | 777 | pos = strstr(filepath, filename); |
minqi@4750 | 778 | *pos = '\0'; |
minqi@4750 | 779 | strcat(filepath, "/server"); |
minqi@4750 | 780 | strcat(filepath, filename); |
minqi@4750 | 781 | if (exists(filepath)) { |
minqi@4750 | 782 | strcpy(rpath, filepath); |
minqi@4750 | 783 | return true; |
minqi@4750 | 784 | } |
minqi@4750 | 785 | |
minqi@4750 | 786 | return false; |
minqi@4750 | 787 | } |
minqi@4750 | 788 | |
minqi@4750 | 789 | static bool read_shared_lib_info(struct ps_prochandle* ph) { |
minqi@4750 | 790 | static int pagesize = 0; |
minqi@4750 | 791 | int fd = ph->core->core_fd; |
minqi@4750 | 792 | int i = 0, j; |
minqi@4750 | 793 | uint32_t v; |
minqi@4750 | 794 | mach_header_64 header; // used to check if a file header in segment |
minqi@4750 | 795 | load_command lcmd; |
minqi@4750 | 796 | dylib_command dylibcmd; |
minqi@4750 | 797 | |
minqi@4750 | 798 | char name[BUF_SIZE]; // use to store name |
minqi@4750 | 799 | |
minqi@4750 | 800 | if (pagesize == 0) { |
minqi@4750 | 801 | pagesize = getpagesize(); |
minqi@4750 | 802 | print_debug("page size is %d\n", pagesize); |
minqi@4750 | 803 | } |
minqi@4750 | 804 | for (j = 0; j < ph->core->num_maps; j++) { |
minqi@4750 | 805 | map_info *iter = ph->core->map_array[j]; // head |
minqi@4750 | 806 | off_t fpos = iter->offset; |
minqi@4750 | 807 | if (iter->fd != fd) { |
minqi@4750 | 808 | // only search core file! |
minqi@4750 | 809 | continue; |
minqi@4750 | 810 | } |
minqi@4750 | 811 | print_debug("map_info %d: vmaddr = 0x%016" PRIx64 " fileoff = %" PRIu64 " vmsize = %" PRIu64 "\n", |
minqi@4750 | 812 | j, iter->vaddr, iter->offset, iter->memsz); |
minqi@4750 | 813 | lseek(fd, fpos, SEEK_SET); |
minqi@4750 | 814 | // we assume .dylib loaded at segment address --- which is true for JVM libraries |
minqi@4750 | 815 | // multiple files may be loaded in one segment. |
minqi@4750 | 816 | // if first word is not a magic word, means this segment does not contain lib file. |
minqi@4750 | 817 | if (read(fd, (void *)&v, sizeof(uint32_t)) == sizeof(uint32_t)) { |
minqi@4750 | 818 | if (v != MH_MAGIC_64) { |
minqi@4750 | 819 | continue; |
minqi@4750 | 820 | } |
minqi@4750 | 821 | } else { |
minqi@4750 | 822 | // may be encountered last map, which is not readable |
minqi@4750 | 823 | continue; |
minqi@4750 | 824 | } |
minqi@4750 | 825 | while (ltell(fd) - iter->offset < iter->memsz) { |
minqi@4750 | 826 | lseek(fd, fpos, SEEK_SET); |
minqi@4750 | 827 | if (read(fd, (void *)&v, sizeof(uint32_t)) != sizeof(uint32_t)) { |
minqi@4750 | 828 | break; |
minqi@4750 | 829 | } |
minqi@4750 | 830 | if (v != MH_MAGIC_64) { |
minqi@4750 | 831 | fpos = (ltell(fd) + pagesize -1)/pagesize * pagesize; |
minqi@4750 | 832 | continue; |
minqi@4750 | 833 | } |
minqi@4750 | 834 | lseek(fd, -sizeof(uint32_t), SEEK_CUR); |
minqi@4750 | 835 | // this is the file begining to core file. |
minqi@4750 | 836 | if (read(fd, (void *)&header, sizeof(mach_header_64)) != sizeof(mach_header_64)) { |
minqi@4750 | 837 | goto err; |
minqi@4750 | 838 | } |
minqi@4750 | 839 | fpos = ltell(fd); |
minqi@4750 | 840 | |
minqi@4750 | 841 | // found a mach-o file in this segment |
minqi@4750 | 842 | for (i = 0; i < header.ncmds; i++) { |
minqi@4750 | 843 | // read commands in this "file" |
minqi@4750 | 844 | // LC_ID_DYLIB is the file itself for a .dylib |
minqi@4750 | 845 | lseek(fd, fpos, SEEK_SET); |
minqi@4750 | 846 | if (read(fd, (void *)&lcmd, sizeof(load_command)) != sizeof(load_command)) { |
minqi@4750 | 847 | return false; // error |
minqi@4750 | 848 | } |
minqi@4750 | 849 | fpos += lcmd.cmdsize; // next command position |
minqi@4750 | 850 | // make sure still within seg size. |
minqi@4750 | 851 | if (fpos - lcmd.cmdsize - iter->offset > iter->memsz) { |
minqi@4750 | 852 | print_debug("Warning: out of segement limit: %ld \n", fpos - lcmd.cmdsize - iter->offset); |
minqi@4750 | 853 | break; // no need to iterate all commands |
minqi@4750 | 854 | } |
minqi@4750 | 855 | if (lcmd.cmd == LC_ID_DYLIB) { |
minqi@4750 | 856 | lseek(fd, -sizeof(load_command), SEEK_CUR); |
minqi@4750 | 857 | if (read(fd, (void *)&dylibcmd, sizeof(dylib_command)) != sizeof(dylib_command)) { |
minqi@4750 | 858 | return false; |
minqi@4750 | 859 | } |
minqi@4750 | 860 | /**** name stored at dylib_command.dylib.name.offset, is a C string */ |
minqi@4750 | 861 | lseek(fd, dylibcmd.dylib.name.offset - sizeof(dylib_command), SEEK_CUR); |
minqi@4750 | 862 | int j = 0; |
minqi@4750 | 863 | while (j < BUF_SIZE) { |
minqi@4750 | 864 | read(fd, (void *)(name + j), sizeof(char)); |
minqi@4750 | 865 | if (name[j] == '\0') break; |
minqi@4750 | 866 | j++; |
minqi@4750 | 867 | } |
minqi@4750 | 868 | print_debug("%s\n", name); |
minqi@4750 | 869 | // changed name from @rpath/xxxx.dylib to real path |
minqi@4750 | 870 | if (strrchr(name, '@')) { |
minqi@4750 | 871 | get_real_path(ph, name); |
minqi@4750 | 872 | print_debug("get_real_path returned: %s\n", name); |
minqi@4750 | 873 | } |
minqi@4750 | 874 | add_lib_info(ph, name, iter->vaddr); |
minqi@4750 | 875 | break; |
minqi@4750 | 876 | } |
minqi@4750 | 877 | } |
minqi@4750 | 878 | // done with the file, advanced to next page to search more files |
minqi@4750 | 879 | fpos = (ltell(fd) + pagesize - 1) / pagesize * pagesize; |
minqi@4750 | 880 | } |
minqi@4750 | 881 | } |
minqi@4750 | 882 | return true; |
minqi@4750 | 883 | err: |
minqi@4750 | 884 | return false; |
minqi@4750 | 885 | } |
minqi@4750 | 886 | |
minqi@4750 | 887 | bool read_macho64_header(int fd, mach_header_64* core_header) { |
minqi@4750 | 888 | bool is_macho = false; |
minqi@4750 | 889 | if (fd < 0) return false; |
minqi@4750 | 890 | off_t pos = ltell(fd); |
minqi@4750 | 891 | lseek(fd, 0, SEEK_SET); |
minqi@4750 | 892 | if (read(fd, (void *)core_header, sizeof(mach_header_64)) != sizeof(mach_header_64)) { |
minqi@4750 | 893 | is_macho = false; |
minqi@4750 | 894 | } else { |
minqi@4750 | 895 | is_macho = (core_header->magic == MH_MAGIC_64 || core_header->magic == MH_CIGAM_64); |
minqi@4750 | 896 | } |
minqi@4750 | 897 | lseek(fd, pos, SEEK_SET); |
minqi@4750 | 898 | return is_macho; |
minqi@4750 | 899 | } |
minqi@4750 | 900 | |
minqi@4750 | 901 | // the one and only one exposed stuff from this file |
minqi@4750 | 902 | struct ps_prochandle* Pgrab_core(const char* exec_file, const char* core_file) { |
minqi@4750 | 903 | mach_header_64 core_header; |
minqi@4750 | 904 | mach_header_64 exec_header; |
minqi@4750 | 905 | |
minqi@4750 | 906 | struct ps_prochandle* ph = (struct ps_prochandle*) calloc(1, sizeof(struct ps_prochandle)); |
minqi@4750 | 907 | if (ph == NULL) { |
minqi@4750 | 908 | print_debug("cant allocate ps_prochandle\n"); |
minqi@4750 | 909 | return NULL; |
minqi@4750 | 910 | } |
minqi@4750 | 911 | |
minqi@4750 | 912 | if ((ph->core = (struct core_data*) calloc(1, sizeof(struct core_data))) == NULL) { |
minqi@4750 | 913 | free(ph); |
minqi@4750 | 914 | print_debug("can't allocate ps_prochandle\n"); |
minqi@4750 | 915 | return NULL; |
minqi@4750 | 916 | } |
minqi@4750 | 917 | |
minqi@4750 | 918 | // initialize ph |
minqi@4750 | 919 | ph->ops = &core_ops; |
minqi@4750 | 920 | ph->core->core_fd = -1; |
minqi@4750 | 921 | ph->core->exec_fd = -1; |
minqi@4750 | 922 | ph->core->interp_fd = -1; |
minqi@4750 | 923 | |
minqi@4750 | 924 | print_debug("exec: %s core: %s", exec_file, core_file); |
minqi@4750 | 925 | |
minqi@4750 | 926 | strncpy(ph->core->exec_path, exec_file, sizeof(ph->core->exec_path)); |
minqi@4750 | 927 | |
minqi@4750 | 928 | // open the core file |
minqi@4750 | 929 | if ((ph->core->core_fd = open(core_file, O_RDONLY)) < 0) { |
minqi@4750 | 930 | print_error("can't open core file\n"); |
minqi@4750 | 931 | goto err; |
minqi@4750 | 932 | } |
minqi@4750 | 933 | |
minqi@4750 | 934 | // read core file header |
minqi@4750 | 935 | if (read_macho64_header(ph->core->core_fd, &core_header) != true || core_header.filetype != MH_CORE) { |
minqi@4750 | 936 | print_debug("core file is not a valid Mach-O file\n"); |
minqi@4750 | 937 | goto err; |
minqi@4750 | 938 | } |
minqi@4750 | 939 | |
minqi@4750 | 940 | if ((ph->core->exec_fd = open(exec_file, O_RDONLY)) < 0) { |
minqi@4750 | 941 | print_error("can't open executable file\n"); |
minqi@4750 | 942 | goto err; |
minqi@4750 | 943 | } |
minqi@4750 | 944 | |
minqi@4750 | 945 | if (read_macho64_header(ph->core->exec_fd, &exec_header) != true || |
minqi@4750 | 946 | exec_header.filetype != MH_EXECUTE) { |
minqi@4750 | 947 | print_error("executable file is not a valid Mach-O file\n"); |
minqi@4750 | 948 | goto err; |
minqi@4750 | 949 | } |
minqi@4750 | 950 | |
minqi@4750 | 951 | // process core file segments |
minqi@4750 | 952 | if (read_core_segments(ph) != true) { |
minqi@4750 | 953 | print_error("failed to read core segments\n"); |
minqi@4750 | 954 | goto err; |
minqi@4750 | 955 | } |
minqi@4750 | 956 | |
minqi@4750 | 957 | // allocate and sort maps into map_array, we need to do this |
minqi@4750 | 958 | // here because read_shared_lib_info needs to read from debuggee |
minqi@4750 | 959 | // address space |
minqi@4750 | 960 | if (sort_map_array(ph) != true) { |
minqi@4750 | 961 | print_error("failed to sort segment map array\n"); |
minqi@4750 | 962 | goto err; |
minqi@4750 | 963 | } |
minqi@4750 | 964 | |
minqi@4750 | 965 | if (read_shared_lib_info(ph) != true) { |
minqi@4750 | 966 | print_error("failed to read libraries\n"); |
minqi@4750 | 967 | goto err; |
minqi@4750 | 968 | } |
minqi@4750 | 969 | |
minqi@4750 | 970 | // sort again because we have added more mappings from shared objects |
minqi@4750 | 971 | if (sort_map_array(ph) != true) { |
minqi@4750 | 972 | print_error("failed to sort segment map array\n"); |
minqi@4750 | 973 | goto err; |
minqi@4750 | 974 | } |
minqi@4750 | 975 | |
minqi@4750 | 976 | if (init_classsharing_workaround(ph) != true) { |
minqi@4750 | 977 | print_error("failed to workaround classshareing\n"); |
minqi@4750 | 978 | goto err; |
minqi@4750 | 979 | } |
minqi@4750 | 980 | |
minqi@4750 | 981 | print_debug("Leave Pgrab_core\n"); |
minqi@4750 | 982 | return ph; |
minqi@4750 | 983 | |
minqi@4750 | 984 | err: |
minqi@4750 | 985 | Prelease(ph); |
minqi@4750 | 986 | return NULL; |
minqi@4750 | 987 | } |
minqi@4750 | 988 | |
minqi@4750 | 989 | #else // __APPLE__ (none macosx) |
minqi@4750 | 990 | |
minqi@4750 | 991 | // read regs and create thread from core file |
never@3156 | 992 | static bool core_handle_prstatus(struct ps_prochandle* ph, const char* buf, size_t nbytes) { |
never@3156 | 993 | // we have to read prstatus_t from buf |
never@3156 | 994 | // assert(nbytes == sizeof(prstaus_t), "size mismatch on prstatus_t"); |
never@3156 | 995 | prstatus_t* prstat = (prstatus_t*) buf; |
minqi@4750 | 996 | sa_thread_info* newthr; |
never@3156 | 997 | print_debug("got integer regset for lwp %d\n", prstat->pr_pid); |
never@3156 | 998 | // we set pthread_t to -1 for core dump |
never@3156 | 999 | if((newthr = add_thread_info(ph, (pthread_t) -1, prstat->pr_pid)) == NULL) |
never@3156 | 1000 | return false; |
never@3156 | 1001 | |
never@3156 | 1002 | // copy regs |
never@3156 | 1003 | memcpy(&newthr->regs, &prstat->pr_reg, sizeof(struct reg)); |
never@3156 | 1004 | |
never@3156 | 1005 | if (is_debug()) { |
never@3156 | 1006 | print_debug("integer regset\n"); |
never@3156 | 1007 | #ifdef i386 |
never@3156 | 1008 | // print the regset |
never@3156 | 1009 | print_debug("\teax = 0x%x\n", newthr->regs.r_eax); |
never@3156 | 1010 | print_debug("\tebx = 0x%x\n", newthr->regs.r_ebx); |
never@3156 | 1011 | print_debug("\tecx = 0x%x\n", newthr->regs.r_ecx); |
never@3156 | 1012 | print_debug("\tedx = 0x%x\n", newthr->regs.r_edx); |
never@3156 | 1013 | print_debug("\tesp = 0x%x\n", newthr->regs.r_esp); |
never@3156 | 1014 | print_debug("\tebp = 0x%x\n", newthr->regs.r_ebp); |
never@3156 | 1015 | print_debug("\tesi = 0x%x\n", newthr->regs.r_esi); |
never@3156 | 1016 | print_debug("\tedi = 0x%x\n", newthr->regs.r_edi); |
never@3156 | 1017 | print_debug("\teip = 0x%x\n", newthr->regs.r_eip); |
never@3156 | 1018 | #endif |
never@3156 | 1019 | |
never@3156 | 1020 | #if defined(amd64) || defined(x86_64) |
never@3156 | 1021 | // print the regset |
never@3156 | 1022 | print_debug("\tr15 = 0x%lx\n", newthr->regs.r_r15); |
never@3156 | 1023 | print_debug("\tr14 = 0x%lx\n", newthr->regs.r_r14); |
never@3156 | 1024 | print_debug("\tr13 = 0x%lx\n", newthr->regs.r_r13); |
never@3156 | 1025 | print_debug("\tr12 = 0x%lx\n", newthr->regs.r_r12); |
never@3156 | 1026 | print_debug("\trbp = 0x%lx\n", newthr->regs.r_rbp); |
never@3156 | 1027 | print_debug("\trbx = 0x%lx\n", newthr->regs.r_rbx); |
never@3156 | 1028 | print_debug("\tr11 = 0x%lx\n", newthr->regs.r_r11); |
never@3156 | 1029 | print_debug("\tr10 = 0x%lx\n", newthr->regs.r_r10); |
never@3156 | 1030 | print_debug("\tr9 = 0x%lx\n", newthr->regs.r_r9); |
never@3156 | 1031 | print_debug("\tr8 = 0x%lx\n", newthr->regs.r_r8); |
never@3156 | 1032 | print_debug("\trax = 0x%lx\n", newthr->regs.r_rax); |
never@3156 | 1033 | print_debug("\trcx = 0x%lx\n", newthr->regs.r_rcx); |
never@3156 | 1034 | print_debug("\trdx = 0x%lx\n", newthr->regs.r_rdx); |
never@3156 | 1035 | print_debug("\trsi = 0x%lx\n", newthr->regs.r_rsi); |
never@3156 | 1036 | print_debug("\trdi = 0x%lx\n", newthr->regs.r_rdi); |
never@3156 | 1037 | //print_debug("\torig_rax = 0x%lx\n", newthr->regs.orig_rax); |
never@3156 | 1038 | print_debug("\trip = 0x%lx\n", newthr->regs.r_rip); |
never@3156 | 1039 | print_debug("\tcs = 0x%lx\n", newthr->regs.r_cs); |
never@3156 | 1040 | //print_debug("\teflags = 0x%lx\n", newthr->regs.eflags); |
never@3156 | 1041 | print_debug("\trsp = 0x%lx\n", newthr->regs.r_rsp); |
never@3156 | 1042 | print_debug("\tss = 0x%lx\n", newthr->regs.r_ss); |
never@3156 | 1043 | //print_debug("\tfs_base = 0x%lx\n", newthr->regs.fs_base); |
never@3156 | 1044 | //print_debug("\tgs_base = 0x%lx\n", newthr->regs.gs_base); |
never@3156 | 1045 | //print_debug("\tds = 0x%lx\n", newthr->regs.ds); |
never@3156 | 1046 | //print_debug("\tes = 0x%lx\n", newthr->regs.es); |
never@3156 | 1047 | //print_debug("\tfs = 0x%lx\n", newthr->regs.fs); |
never@3156 | 1048 | //print_debug("\tgs = 0x%lx\n", newthr->regs.gs); |
never@3156 | 1049 | #endif |
never@3156 | 1050 | } |
never@3156 | 1051 | |
never@3156 | 1052 | return true; |
never@3156 | 1053 | } |
never@3156 | 1054 | |
never@3156 | 1055 | #define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y)) |
never@3156 | 1056 | |
never@3156 | 1057 | // read NT_PRSTATUS entries from core NOTE segment |
never@3156 | 1058 | static bool core_handle_note(struct ps_prochandle* ph, ELF_PHDR* note_phdr) { |
never@3156 | 1059 | char* buf = NULL; |
never@3156 | 1060 | char* p = NULL; |
never@3156 | 1061 | size_t size = note_phdr->p_filesz; |
never@3156 | 1062 | |
never@3156 | 1063 | // we are interested in just prstatus entries. we will ignore the rest. |
never@3156 | 1064 | // Advance the seek pointer to the start of the PT_NOTE data |
never@3156 | 1065 | if (lseek(ph->core->core_fd, note_phdr->p_offset, SEEK_SET) == (off_t)-1) { |
never@3156 | 1066 | print_debug("failed to lseek to PT_NOTE data\n"); |
never@3156 | 1067 | return false; |
never@3156 | 1068 | } |
never@3156 | 1069 | |
never@3156 | 1070 | // Now process the PT_NOTE structures. Each one is preceded by |
never@3156 | 1071 | // an Elf{32/64}_Nhdr structure describing its type and size. |
never@3156 | 1072 | if ( (buf = (char*) malloc(size)) == NULL) { |
never@3156 | 1073 | print_debug("can't allocate memory for reading core notes\n"); |
never@3156 | 1074 | goto err; |
never@3156 | 1075 | } |
never@3156 | 1076 | |
never@3156 | 1077 | // read notes into buffer |
never@3156 | 1078 | if (read(ph->core->core_fd, buf, size) != size) { |
never@3156 | 1079 | print_debug("failed to read notes, core file must have been truncated\n"); |
never@3156 | 1080 | goto err; |
never@3156 | 1081 | } |
never@3156 | 1082 | |
never@3156 | 1083 | p = buf; |
never@3156 | 1084 | while (p < buf + size) { |
never@3156 | 1085 | ELF_NHDR* notep = (ELF_NHDR*) p; |
never@3156 | 1086 | char* descdata = p + sizeof(ELF_NHDR) + ROUNDUP(notep->n_namesz, 4); |
never@3156 | 1087 | print_debug("Note header with n_type = %d and n_descsz = %u\n", |
never@3156 | 1088 | notep->n_type, notep->n_descsz); |
never@3156 | 1089 | |
never@3156 | 1090 | if (notep->n_type == NT_PRSTATUS) { |
dsamersoff@5832 | 1091 | if (core_handle_prstatus(ph, descdata, notep->n_descsz) != true) { |
dsamersoff@5832 | 1092 | return false; |
dsamersoff@5832 | 1093 | } |
never@3156 | 1094 | } |
never@3156 | 1095 | p = descdata + ROUNDUP(notep->n_descsz, 4); |
never@3156 | 1096 | } |
never@3156 | 1097 | |
never@3156 | 1098 | free(buf); |
never@3156 | 1099 | return true; |
never@3156 | 1100 | |
never@3156 | 1101 | err: |
never@3156 | 1102 | if (buf) free(buf); |
never@3156 | 1103 | return false; |
never@3156 | 1104 | } |
never@3156 | 1105 | |
never@3156 | 1106 | // read all segments from core file |
never@3156 | 1107 | static bool read_core_segments(struct ps_prochandle* ph, ELF_EHDR* core_ehdr) { |
never@3156 | 1108 | int i = 0; |
never@3156 | 1109 | ELF_PHDR* phbuf = NULL; |
never@3156 | 1110 | ELF_PHDR* core_php = NULL; |
never@3156 | 1111 | |
never@3156 | 1112 | if ((phbuf = read_program_header_table(ph->core->core_fd, core_ehdr)) == NULL) |
never@3156 | 1113 | return false; |
never@3156 | 1114 | |
never@3156 | 1115 | /* |
never@3156 | 1116 | * Now iterate through the program headers in the core file. |
never@3156 | 1117 | * We're interested in two types of Phdrs: PT_NOTE (which |
never@3156 | 1118 | * contains a set of saved /proc structures), and PT_LOAD (which |
never@3156 | 1119 | * represents a memory mapping from the process's address space). |
never@3156 | 1120 | * |
dsamersoff@5832 | 1121 | * Difference b/w Solaris PT_NOTE and Linux/BSD PT_NOTE: |
never@3156 | 1122 | * |
never@3156 | 1123 | * In Solaris there are two PT_NOTE segments the first PT_NOTE (if present) |
never@3156 | 1124 | * contains /proc structs in the pre-2.6 unstructured /proc format. the last |
never@3156 | 1125 | * PT_NOTE has data in new /proc format. |
never@3156 | 1126 | * |
never@3156 | 1127 | * In Solaris, there is only one pstatus (process status). pstatus contains |
never@3156 | 1128 | * integer register set among other stuff. For each LWP, we have one lwpstatus |
never@3156 | 1129 | * entry that has integer regset for that LWP. |
never@3156 | 1130 | * |
never@3156 | 1131 | * Linux threads are actually 'clone'd processes. To support core analysis |
never@3156 | 1132 | * of "multithreaded" process, Linux creates more than one pstatus (called |
never@3156 | 1133 | * "prstatus") entry in PT_NOTE. Each prstatus entry has integer regset for one |
never@3156 | 1134 | * "thread". Please refer to Linux kernel src file 'fs/binfmt_elf.c', in particular |
never@3156 | 1135 | * function "elf_core_dump". |
never@3156 | 1136 | */ |
never@3156 | 1137 | |
never@3156 | 1138 | for (core_php = phbuf, i = 0; i < core_ehdr->e_phnum; i++) { |
never@3156 | 1139 | switch (core_php->p_type) { |
never@3156 | 1140 | case PT_NOTE: |
minqi@4750 | 1141 | if (core_handle_note(ph, core_php) != true) { |
minqi@4750 | 1142 | goto err; |
minqi@4750 | 1143 | } |
never@3156 | 1144 | break; |
never@3156 | 1145 | |
never@3156 | 1146 | case PT_LOAD: { |
never@3156 | 1147 | if (core_php->p_filesz != 0) { |
never@3156 | 1148 | if (add_map_info(ph, ph->core->core_fd, core_php->p_offset, |
never@3156 | 1149 | core_php->p_vaddr, core_php->p_filesz) == NULL) goto err; |
never@3156 | 1150 | } |
never@3156 | 1151 | break; |
never@3156 | 1152 | } |
never@3156 | 1153 | } |
never@3156 | 1154 | |
never@3156 | 1155 | core_php++; |
never@3156 | 1156 | } |
never@3156 | 1157 | |
never@3156 | 1158 | free(phbuf); |
never@3156 | 1159 | return true; |
never@3156 | 1160 | err: |
never@3156 | 1161 | free(phbuf); |
never@3156 | 1162 | return false; |
never@3156 | 1163 | } |
never@3156 | 1164 | |
never@3156 | 1165 | // read segments of a shared object |
never@3156 | 1166 | static bool read_lib_segments(struct ps_prochandle* ph, int lib_fd, ELF_EHDR* lib_ehdr, uintptr_t lib_base) { |
dsamersoff@5832 | 1167 | int i = 0; |
dsamersoff@5832 | 1168 | ELF_PHDR* phbuf; |
dsamersoff@5832 | 1169 | ELF_PHDR* lib_php = NULL; |
never@3156 | 1170 | |
dsamersoff@5832 | 1171 | int page_size=sysconf(_SC_PAGE_SIZE); |
never@3156 | 1172 | |
dsamersoff@5832 | 1173 | if ((phbuf = read_program_header_table(lib_fd, lib_ehdr)) == NULL) { |
dsamersoff@5832 | 1174 | return false; |
dsamersoff@5832 | 1175 | } |
dsamersoff@5832 | 1176 | |
dsamersoff@5832 | 1177 | // we want to process only PT_LOAD segments that are not writable. |
dsamersoff@5832 | 1178 | // i.e., text segments. The read/write/exec (data) segments would |
dsamersoff@5832 | 1179 | // have been already added from core file segments. |
dsamersoff@5832 | 1180 | for (lib_php = phbuf, i = 0; i < lib_ehdr->e_phnum; i++) { |
dsamersoff@5832 | 1181 | if ((lib_php->p_type == PT_LOAD) && !(lib_php->p_flags & PF_W) && (lib_php->p_filesz != 0)) { |
dsamersoff@5832 | 1182 | |
dsamersoff@5832 | 1183 | uintptr_t target_vaddr = lib_php->p_vaddr + lib_base; |
dsamersoff@5832 | 1184 | map_info *existing_map = core_lookup(ph, target_vaddr); |
dsamersoff@5832 | 1185 | |
dsamersoff@5832 | 1186 | if (existing_map == NULL){ |
dsamersoff@5832 | 1187 | if (add_map_info(ph, lib_fd, lib_php->p_offset, |
dsamersoff@5832 | 1188 | target_vaddr, lib_php->p_filesz) == NULL) { |
dsamersoff@5832 | 1189 | goto err; |
dsamersoff@5832 | 1190 | } |
dsamersoff@5832 | 1191 | } else { |
dsamersoff@5832 | 1192 | if ((existing_map->memsz != page_size) && |
dsamersoff@5832 | 1193 | (existing_map->fd != lib_fd) && |
dsamersoff@5832 | 1194 | (existing_map->memsz != lib_php->p_filesz)){ |
dsamersoff@5832 | 1195 | |
dsamersoff@5832 | 1196 | print_debug("address conflict @ 0x%lx (size = %ld, flags = %d\n)", |
dsamersoff@5832 | 1197 | target_vaddr, lib_php->p_filesz, lib_php->p_flags); |
dsamersoff@5832 | 1198 | goto err; |
dsamersoff@5832 | 1199 | } |
dsamersoff@5832 | 1200 | |
dsamersoff@5832 | 1201 | /* replace PT_LOAD segment with library segment */ |
dsamersoff@5832 | 1202 | print_debug("overwrote with new address mapping (memsz %ld -> %ld)\n", |
dsamersoff@5832 | 1203 | existing_map->memsz, lib_php->p_filesz); |
dsamersoff@5832 | 1204 | |
dsamersoff@5832 | 1205 | existing_map->fd = lib_fd; |
dsamersoff@5832 | 1206 | existing_map->offset = lib_php->p_offset; |
dsamersoff@5832 | 1207 | existing_map->memsz = lib_php->p_filesz; |
never@3156 | 1208 | } |
dsamersoff@5832 | 1209 | } |
never@3156 | 1210 | |
dsamersoff@5832 | 1211 | lib_php++; |
dsamersoff@5832 | 1212 | } |
dsamersoff@5832 | 1213 | |
dsamersoff@5832 | 1214 | free(phbuf); |
dsamersoff@5832 | 1215 | return true; |
never@3156 | 1216 | err: |
dsamersoff@5832 | 1217 | free(phbuf); |
dsamersoff@5832 | 1218 | return false; |
never@3156 | 1219 | } |
never@3156 | 1220 | |
dsamersoff@5832 | 1221 | // process segments from interpreter (ld.so or ld-linux.so or ld-elf.so) |
never@3156 | 1222 | static bool read_interp_segments(struct ps_prochandle* ph) { |
never@3156 | 1223 | ELF_EHDR interp_ehdr; |
never@3156 | 1224 | |
never@3156 | 1225 | if (read_elf_header(ph->core->interp_fd, &interp_ehdr) != true) { |
never@3156 | 1226 | print_debug("interpreter is not a valid ELF file\n"); |
never@3156 | 1227 | return false; |
never@3156 | 1228 | } |
never@3156 | 1229 | |
never@3156 | 1230 | if (read_lib_segments(ph, ph->core->interp_fd, &interp_ehdr, ph->core->ld_base_addr) != true) { |
never@3156 | 1231 | print_debug("can't read segments of interpreter\n"); |
never@3156 | 1232 | return false; |
never@3156 | 1233 | } |
never@3156 | 1234 | |
never@3156 | 1235 | return true; |
never@3156 | 1236 | } |
never@3156 | 1237 | |
never@3156 | 1238 | // process segments of a a.out |
never@3156 | 1239 | static bool read_exec_segments(struct ps_prochandle* ph, ELF_EHDR* exec_ehdr) { |
never@3156 | 1240 | int i = 0; |
never@3156 | 1241 | ELF_PHDR* phbuf = NULL; |
never@3156 | 1242 | ELF_PHDR* exec_php = NULL; |
never@3156 | 1243 | |
never@3156 | 1244 | if ((phbuf = read_program_header_table(ph->core->exec_fd, exec_ehdr)) == NULL) |
never@3156 | 1245 | return false; |
never@3156 | 1246 | |
never@3156 | 1247 | for (exec_php = phbuf, i = 0; i < exec_ehdr->e_phnum; i++) { |
never@3156 | 1248 | switch (exec_php->p_type) { |
never@3156 | 1249 | |
never@3156 | 1250 | // add mappings for PT_LOAD segments |
never@3156 | 1251 | case PT_LOAD: { |
never@3156 | 1252 | // add only non-writable segments of non-zero filesz |
never@3156 | 1253 | if (!(exec_php->p_flags & PF_W) && exec_php->p_filesz != 0) { |
never@3156 | 1254 | if (add_map_info(ph, ph->core->exec_fd, exec_php->p_offset, exec_php->p_vaddr, exec_php->p_filesz) == NULL) goto err; |
never@3156 | 1255 | } |
never@3156 | 1256 | break; |
never@3156 | 1257 | } |
never@3156 | 1258 | |
never@3156 | 1259 | // read the interpreter and it's segments |
never@3156 | 1260 | case PT_INTERP: { |
never@3156 | 1261 | char interp_name[BUF_SIZE]; |
never@3156 | 1262 | |
never@3156 | 1263 | pread(ph->core->exec_fd, interp_name, MIN(exec_php->p_filesz, BUF_SIZE), exec_php->p_offset); |
never@3156 | 1264 | print_debug("ELF interpreter %s\n", interp_name); |
never@3156 | 1265 | // read interpreter segments as well |
never@3156 | 1266 | if ((ph->core->interp_fd = pathmap_open(interp_name)) < 0) { |
never@3156 | 1267 | print_debug("can't open runtime loader\n"); |
never@3156 | 1268 | goto err; |
never@3156 | 1269 | } |
never@3156 | 1270 | break; |
never@3156 | 1271 | } |
never@3156 | 1272 | |
never@3156 | 1273 | // from PT_DYNAMIC we want to read address of first link_map addr |
never@3156 | 1274 | case PT_DYNAMIC: { |
never@3156 | 1275 | ph->core->dynamic_addr = exec_php->p_vaddr; |
never@3156 | 1276 | print_debug("address of _DYNAMIC is 0x%lx\n", ph->core->dynamic_addr); |
never@3156 | 1277 | break; |
never@3156 | 1278 | } |
never@3156 | 1279 | |
never@3156 | 1280 | } // switch |
never@3156 | 1281 | exec_php++; |
never@3156 | 1282 | } // for |
never@3156 | 1283 | |
never@3156 | 1284 | free(phbuf); |
never@3156 | 1285 | return true; |
never@3156 | 1286 | err: |
never@3156 | 1287 | free(phbuf); |
never@3156 | 1288 | return false; |
never@3156 | 1289 | } |
never@3156 | 1290 | |
never@3156 | 1291 | #define FIRST_LINK_MAP_OFFSET offsetof(struct r_debug, r_map) |
never@3156 | 1292 | #define LD_BASE_OFFSET offsetof(struct r_debug, r_ldbase) |
never@3156 | 1293 | #define LINK_MAP_ADDR_OFFSET offsetof(struct link_map, l_addr) |
never@3156 | 1294 | #define LINK_MAP_NAME_OFFSET offsetof(struct link_map, l_name) |
never@3156 | 1295 | #define LINK_MAP_NEXT_OFFSET offsetof(struct link_map, l_next) |
never@3156 | 1296 | |
never@3156 | 1297 | // read shared library info from runtime linker's data structures. |
never@3156 | 1298 | // This work is done by librtlb_db in Solaris |
never@3156 | 1299 | static bool read_shared_lib_info(struct ps_prochandle* ph) { |
minqi@4750 | 1300 | uintptr_t addr = ph->core->dynamic_addr; |
minqi@4750 | 1301 | uintptr_t debug_base; |
minqi@4750 | 1302 | uintptr_t first_link_map_addr; |
minqi@4750 | 1303 | uintptr_t ld_base_addr; |
minqi@4750 | 1304 | uintptr_t link_map_addr; |
minqi@4750 | 1305 | uintptr_t lib_base_diff; |
minqi@4750 | 1306 | uintptr_t lib_base; |
minqi@4750 | 1307 | uintptr_t lib_name_addr; |
minqi@4750 | 1308 | char lib_name[BUF_SIZE]; |
minqi@4750 | 1309 | ELF_DYN dyn; |
minqi@4750 | 1310 | ELF_EHDR elf_ehdr; |
minqi@4750 | 1311 | int lib_fd; |
never@3156 | 1312 | |
minqi@4750 | 1313 | // _DYNAMIC has information of the form |
minqi@4750 | 1314 | // [tag] [data] [tag] [data] ..... |
minqi@4750 | 1315 | // Both tag and data are pointer sized. |
minqi@4750 | 1316 | // We look for dynamic info with DT_DEBUG. This has shared object info. |
minqi@4750 | 1317 | // refer to struct r_debug in link.h |
never@3156 | 1318 | |
minqi@4750 | 1319 | dyn.d_tag = DT_NULL; |
minqi@4750 | 1320 | while (dyn.d_tag != DT_DEBUG) { |
minqi@4750 | 1321 | if (ps_pread(ph, (psaddr_t) addr, &dyn, sizeof(ELF_DYN)) != PS_OK) { |
minqi@4750 | 1322 | print_debug("can't read debug info from _DYNAMIC\n"); |
minqi@4750 | 1323 | return false; |
minqi@4750 | 1324 | } |
minqi@4750 | 1325 | addr += sizeof(ELF_DYN); |
minqi@4750 | 1326 | } |
minqi@4750 | 1327 | |
minqi@4750 | 1328 | // we have got Dyn entry with DT_DEBUG |
minqi@4750 | 1329 | debug_base = dyn.d_un.d_ptr; |
minqi@4750 | 1330 | // at debug_base we have struct r_debug. This has first link map in r_map field |
minqi@4750 | 1331 | if (ps_pread(ph, (psaddr_t) debug_base + FIRST_LINK_MAP_OFFSET, |
dsamersoff@5832 | 1332 | &first_link_map_addr, sizeof(uintptr_t)) != PS_OK) { |
minqi@4750 | 1333 | print_debug("can't read first link map address\n"); |
minqi@4750 | 1334 | return false; |
minqi@4750 | 1335 | } |
minqi@4750 | 1336 | |
minqi@4750 | 1337 | // read ld_base address from struct r_debug |
dsamersoff@5832 | 1338 | #if 0 // There is no r_ldbase member on BSD |
minqi@4750 | 1339 | if (ps_pread(ph, (psaddr_t) debug_base + LD_BASE_OFFSET, &ld_base_addr, |
minqi@4750 | 1340 | sizeof(uintptr_t)) != PS_OK) { |
minqi@4750 | 1341 | print_debug("can't read ld base address\n"); |
minqi@4750 | 1342 | return false; |
minqi@4750 | 1343 | } |
minqi@4750 | 1344 | ph->core->ld_base_addr = ld_base_addr; |
dsamersoff@5832 | 1345 | #else |
minqi@4750 | 1346 | ph->core->ld_base_addr = 0; |
dsamersoff@5832 | 1347 | #endif |
minqi@4750 | 1348 | |
minqi@4750 | 1349 | print_debug("interpreter base address is 0x%lx\n", ld_base_addr); |
minqi@4750 | 1350 | |
dsamersoff@5832 | 1351 | // now read segments from interp (i.e ld.so or ld-linux.so or ld-elf.so) |
dsamersoff@5832 | 1352 | if (read_interp_segments(ph) != true) { |
minqi@4750 | 1353 | return false; |
dsamersoff@5832 | 1354 | } |
minqi@4750 | 1355 | |
minqi@4750 | 1356 | // after adding interpreter (ld.so) mappings sort again |
dsamersoff@5832 | 1357 | if (sort_map_array(ph) != true) { |
minqi@4750 | 1358 | return false; |
dsamersoff@5832 | 1359 | } |
minqi@4750 | 1360 | |
minqi@4750 | 1361 | print_debug("first link map is at 0x%lx\n", first_link_map_addr); |
minqi@4750 | 1362 | |
minqi@4750 | 1363 | link_map_addr = first_link_map_addr; |
minqi@4750 | 1364 | while (link_map_addr != 0) { |
minqi@4750 | 1365 | // read library base address of the .so. Note that even though <sys/link.h> calls |
minqi@4750 | 1366 | // link_map->l_addr as "base address", this is * not * really base virtual |
minqi@4750 | 1367 | // address of the shared object. This is actually the difference b/w the virtual |
minqi@4750 | 1368 | // address mentioned in shared object and the actual virtual base where runtime |
minqi@4750 | 1369 | // linker loaded it. We use "base diff" in read_lib_segments call below. |
minqi@4750 | 1370 | |
minqi@4750 | 1371 | if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_ADDR_OFFSET, |
minqi@4750 | 1372 | &lib_base_diff, sizeof(uintptr_t)) != PS_OK) { |
minqi@4750 | 1373 | print_debug("can't read shared object base address diff\n"); |
minqi@4750 | 1374 | return false; |
minqi@4750 | 1375 | } |
minqi@4750 | 1376 | |
minqi@4750 | 1377 | // read address of the name |
minqi@4750 | 1378 | if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NAME_OFFSET, |
minqi@4750 | 1379 | &lib_name_addr, sizeof(uintptr_t)) != PS_OK) { |
minqi@4750 | 1380 | print_debug("can't read address of shared object name\n"); |
minqi@4750 | 1381 | return false; |
minqi@4750 | 1382 | } |
minqi@4750 | 1383 | |
minqi@4750 | 1384 | // read name of the shared object |
minqi@4750 | 1385 | if (read_string(ph, (uintptr_t) lib_name_addr, lib_name, sizeof(lib_name)) != true) { |
minqi@4750 | 1386 | print_debug("can't read shared object name\n"); |
minqi@4750 | 1387 | return false; |
minqi@4750 | 1388 | } |
minqi@4750 | 1389 | |
minqi@4750 | 1390 | if (lib_name[0] != '\0') { |
minqi@4750 | 1391 | // ignore empty lib names |
minqi@4750 | 1392 | lib_fd = pathmap_open(lib_name); |
minqi@4750 | 1393 | |
minqi@4750 | 1394 | if (lib_fd < 0) { |
minqi@4750 | 1395 | print_debug("can't open shared object %s\n", lib_name); |
minqi@4750 | 1396 | // continue with other libraries... |
minqi@4750 | 1397 | } else { |
minqi@4750 | 1398 | if (read_elf_header(lib_fd, &elf_ehdr)) { |
minqi@4750 | 1399 | lib_base = lib_base_diff + find_base_address(lib_fd, &elf_ehdr); |
minqi@4750 | 1400 | print_debug("reading library %s @ 0x%lx [ 0x%lx ]\n", |
minqi@4750 | 1401 | lib_name, lib_base, lib_base_diff); |
minqi@4750 | 1402 | // while adding library mappings we need to use "base difference". |
minqi@4750 | 1403 | if (! read_lib_segments(ph, lib_fd, &elf_ehdr, lib_base_diff)) { |
minqi@4750 | 1404 | print_debug("can't read shared object's segments\n"); |
minqi@4750 | 1405 | close(lib_fd); |
minqi@4750 | 1406 | return false; |
minqi@4750 | 1407 | } |
minqi@4750 | 1408 | add_lib_info_fd(ph, lib_name, lib_fd, lib_base); |
minqi@4750 | 1409 | // Map info is added for the library (lib_name) so |
minqi@4750 | 1410 | // we need to re-sort it before calling the p_pdread. |
dsamersoff@5832 | 1411 | if (sort_map_array(ph) != true) { |
minqi@4750 | 1412 | return false; |
dsamersoff@5832 | 1413 | } |
minqi@4750 | 1414 | } else { |
minqi@4750 | 1415 | print_debug("can't read ELF header for shared object %s\n", lib_name); |
minqi@4750 | 1416 | close(lib_fd); |
minqi@4750 | 1417 | // continue with other libraries... |
minqi@4750 | 1418 | } |
never@3156 | 1419 | } |
minqi@4750 | 1420 | } |
never@3156 | 1421 | |
minqi@4750 | 1422 | // read next link_map address |
minqi@4750 | 1423 | if (ps_pread(ph, (psaddr_t) link_map_addr + LINK_MAP_NEXT_OFFSET, |
dsamersoff@5832 | 1424 | &link_map_addr, sizeof(uintptr_t)) != PS_OK) { |
minqi@4750 | 1425 | print_debug("can't read next link in link_map\n"); |
never@3156 | 1426 | return false; |
minqi@4750 | 1427 | } |
minqi@4750 | 1428 | } |
never@3156 | 1429 | |
minqi@4750 | 1430 | return true; |
never@3156 | 1431 | } |
never@3156 | 1432 | |
never@3156 | 1433 | // the one and only one exposed stuff from this file |
never@3156 | 1434 | struct ps_prochandle* Pgrab_core(const char* exec_file, const char* core_file) { |
minqi@4750 | 1435 | ELF_EHDR core_ehdr; |
minqi@4750 | 1436 | ELF_EHDR exec_ehdr; |
never@3156 | 1437 | |
minqi@4750 | 1438 | struct ps_prochandle* ph = (struct ps_prochandle*) calloc(1, sizeof(struct ps_prochandle)); |
minqi@4750 | 1439 | if (ph == NULL) { |
dsamersoff@5832 | 1440 | print_debug("can't allocate ps_prochandle\n"); |
minqi@4750 | 1441 | return NULL; |
minqi@4750 | 1442 | } |
never@3156 | 1443 | |
minqi@4750 | 1444 | if ((ph->core = (struct core_data*) calloc(1, sizeof(struct core_data))) == NULL) { |
minqi@4750 | 1445 | free(ph); |
minqi@4750 | 1446 | print_debug("can't allocate ps_prochandle\n"); |
minqi@4750 | 1447 | return NULL; |
minqi@4750 | 1448 | } |
never@3156 | 1449 | |
minqi@4750 | 1450 | // initialize ph |
minqi@4750 | 1451 | ph->ops = &core_ops; |
minqi@4750 | 1452 | ph->core->core_fd = -1; |
minqi@4750 | 1453 | ph->core->exec_fd = -1; |
minqi@4750 | 1454 | ph->core->interp_fd = -1; |
never@3156 | 1455 | |
minqi@4750 | 1456 | print_debug("exec: %s core: %s", exec_file, core_file); |
never@3156 | 1457 | |
minqi@4750 | 1458 | // open the core file |
minqi@4750 | 1459 | if ((ph->core->core_fd = open(core_file, O_RDONLY)) < 0) { |
minqi@4750 | 1460 | print_debug("can't open core file\n"); |
minqi@4750 | 1461 | goto err; |
minqi@4750 | 1462 | } |
never@3156 | 1463 | |
minqi@4750 | 1464 | // read core file ELF header |
minqi@4750 | 1465 | if (read_elf_header(ph->core->core_fd, &core_ehdr) != true || core_ehdr.e_type != ET_CORE) { |
minqi@4750 | 1466 | print_debug("core file is not a valid ELF ET_CORE file\n"); |
minqi@4750 | 1467 | goto err; |
minqi@4750 | 1468 | } |
never@3156 | 1469 | |
minqi@4750 | 1470 | if ((ph->core->exec_fd = open(exec_file, O_RDONLY)) < 0) { |
minqi@4750 | 1471 | print_debug("can't open executable file\n"); |
minqi@4750 | 1472 | goto err; |
minqi@4750 | 1473 | } |
never@3156 | 1474 | |
minqi@4750 | 1475 | if (read_elf_header(ph->core->exec_fd, &exec_ehdr) != true || exec_ehdr.e_type != ET_EXEC) { |
dsamersoff@5832 | 1476 | print_debug("executable file is not a valid ELF ET_EXEC file\n"); |
dsamersoff@5832 | 1477 | goto err; |
minqi@4750 | 1478 | } |
never@3156 | 1479 | |
minqi@4750 | 1480 | // process core file segments |
dsamersoff@5832 | 1481 | if (read_core_segments(ph, &core_ehdr) != true) { |
dsamersoff@5832 | 1482 | goto err; |
dsamersoff@5832 | 1483 | } |
never@3156 | 1484 | |
minqi@4750 | 1485 | // process exec file segments |
dsamersoff@5832 | 1486 | if (read_exec_segments(ph, &exec_ehdr) != true) { |
dsamersoff@5832 | 1487 | goto err; |
dsamersoff@5832 | 1488 | } |
never@3156 | 1489 | |
minqi@4750 | 1490 | // exec file is also treated like a shared object for symbol search |
minqi@4750 | 1491 | if (add_lib_info_fd(ph, exec_file, ph->core->exec_fd, |
dsamersoff@5832 | 1492 | (uintptr_t)0 + find_base_address(ph->core->exec_fd, &exec_ehdr)) == NULL) { |
dsamersoff@5832 | 1493 | goto err; |
dsamersoff@5832 | 1494 | } |
never@3156 | 1495 | |
minqi@4750 | 1496 | // allocate and sort maps into map_array, we need to do this |
minqi@4750 | 1497 | // here because read_shared_lib_info needs to read from debuggee |
minqi@4750 | 1498 | // address space |
dsamersoff@5832 | 1499 | if (sort_map_array(ph) != true) { |
minqi@4750 | 1500 | goto err; |
dsamersoff@5832 | 1501 | } |
never@3156 | 1502 | |
dsamersoff@5832 | 1503 | if (read_shared_lib_info(ph) != true) { |
minqi@4750 | 1504 | goto err; |
dsamersoff@5832 | 1505 | } |
never@3156 | 1506 | |
minqi@4750 | 1507 | // sort again because we have added more mappings from shared objects |
dsamersoff@5832 | 1508 | if (sort_map_array(ph) != true) { |
minqi@4750 | 1509 | goto err; |
dsamersoff@5832 | 1510 | } |
never@3156 | 1511 | |
dsamersoff@5832 | 1512 | if (init_classsharing_workaround(ph) != true) { |
minqi@4750 | 1513 | goto err; |
dsamersoff@5832 | 1514 | } |
minqi@4750 | 1515 | |
minqi@4750 | 1516 | print_debug("Leave Pgrab_core\n"); |
minqi@4750 | 1517 | return ph; |
never@3156 | 1518 | |
never@3156 | 1519 | err: |
minqi@4750 | 1520 | Prelease(ph); |
minqi@4750 | 1521 | return NULL; |
never@3156 | 1522 | } |
minqi@4750 | 1523 | |
minqi@4750 | 1524 | #endif // __APPLE__ |