The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* system/debuggerd/debuggerd.c |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 8 | ** |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 10 | ** |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <unistd.h> |
| 21 | #include <errno.h> |
| 22 | #include <signal.h> |
| 23 | #include <pthread.h> |
| 24 | #include <stdarg.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <dirent.h> |
| 28 | |
| 29 | #include <sys/ptrace.h> |
| 30 | #include <sys/wait.h> |
| 31 | #include <sys/exec_elf.h> |
| 32 | #include <sys/stat.h> |
| 33 | |
| 34 | #include <cutils/sockets.h> |
| 35 | #include <cutils/logd.h> |
| 36 | #include <cutils/sockets.h> |
| 37 | #include <cutils/properties.h> |
| 38 | |
| 39 | #include <linux/input.h> |
| 40 | |
| 41 | #include <private/android_filesystem_config.h> |
| 42 | |
| 43 | #include "utility.h" |
| 44 | |
| 45 | /* Main entry point to get the backtrace from the crashing process */ |
| 46 | extern int unwind_backtrace_with_ptrace(int tfd, pid_t pid, mapinfo *map, |
| 47 | unsigned int sp_list[], |
| 48 | int *frame0_pc_sane, |
| 49 | bool at_fault); |
| 50 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 51 | static int logsocket = -1; |
| 52 | |
| 53 | #define ANDROID_LOG_INFO 4 |
| 54 | |
| 55 | /* Log information onto the tombstone */ |
| 56 | void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...) |
| 57 | { |
Meng Hu | ae7b91b | 2009-11-05 16:10:50 -0600 | [diff] [blame^] | 58 | char buf[512]; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 59 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 60 | va_list ap; |
| 61 | va_start(ap, fmt); |
| 62 | |
| 63 | if (tfd >= 0) { |
| 64 | int len; |
| 65 | vsnprintf(buf, sizeof(buf), fmt, ap); |
| 66 | len = strlen(buf); |
| 67 | if(tfd >= 0) write(tfd, buf, len); |
| 68 | } |
| 69 | |
| 70 | if (!in_tombstone_only) |
| 71 | __android_log_vprint(ANDROID_LOG_INFO, "DEBUG", fmt, ap); |
| 72 | } |
| 73 | |
| 74 | #define LOG(fmt...) _LOG(-1, 0, fmt) |
| 75 | #if 0 |
| 76 | #define XLOG(fmt...) _LOG(-1, 0, fmt) |
| 77 | #else |
| 78 | #define XLOG(fmt...) do {} while(0) |
| 79 | #endif |
| 80 | |
| 81 | // 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so |
| 82 | // 012345678901234567890123456789012345678901234567890123456789 |
| 83 | // 0 1 2 3 4 5 |
| 84 | |
| 85 | mapinfo *parse_maps_line(char *line) |
| 86 | { |
| 87 | mapinfo *mi; |
| 88 | int len = strlen(line); |
| 89 | |
| 90 | if(len < 1) return 0; |
| 91 | line[--len] = 0; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 92 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 93 | if(len < 50) return 0; |
| 94 | if(line[20] != 'x') return 0; |
| 95 | |
| 96 | mi = malloc(sizeof(mapinfo) + (len - 47)); |
| 97 | if(mi == 0) return 0; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 98 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 99 | mi->start = strtoul(line, 0, 16); |
| 100 | mi->end = strtoul(line + 9, 0, 16); |
Meng Hu | ae7b91b | 2009-11-05 16:10:50 -0600 | [diff] [blame^] | 101 | /* To be filled in parse_elf_info if the mapped section starts with |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 102 | * elf_header |
| 103 | */ |
| 104 | mi->exidx_start = mi->exidx_end = 0; |
Meng Hu | ae7b91b | 2009-11-05 16:10:50 -0600 | [diff] [blame^] | 105 | mi->symbols = 0; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 106 | mi->next = 0; |
| 107 | strcpy(mi->name, line + 49); |
| 108 | |
| 109 | return mi; |
| 110 | } |
| 111 | |
| 112 | void dump_build_info(int tfd) |
| 113 | { |
| 114 | char fingerprint[PROPERTY_VALUE_MAX]; |
| 115 | |
| 116 | property_get("ro.build.fingerprint", fingerprint, "unknown"); |
| 117 | |
| 118 | _LOG(tfd, false, "Build fingerprint: '%s'\n", fingerprint); |
| 119 | } |
| 120 | |
| 121 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 122 | void dump_stack_and_code(int tfd, int pid, mapinfo *map, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 123 | int unwind_depth, unsigned int sp_list[], |
| 124 | int frame0_pc_sane, bool at_fault) |
| 125 | { |
| 126 | unsigned int sp, pc, p, end, data; |
| 127 | struct pt_regs r; |
| 128 | int sp_depth; |
| 129 | bool only_in_tombstone = !at_fault; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 130 | char code_buffer[80]; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 131 | |
| 132 | if(ptrace(PTRACE_GETREGS, pid, 0, &r)) return; |
| 133 | sp = r.ARM_sp; |
| 134 | pc = r.ARM_pc; |
| 135 | |
| 136 | /* Died because calling the weeds - dump |
| 137 | * the code around the PC in the next frame instead. |
| 138 | */ |
| 139 | if (frame0_pc_sane == 0) { |
| 140 | pc = r.ARM_lr; |
| 141 | } |
| 142 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 143 | _LOG(tfd, only_in_tombstone, |
| 144 | "\ncode around %s:\n", frame0_pc_sane ? "pc" : "lr"); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 145 | |
| 146 | end = p = pc & ~3; |
| 147 | p -= 16; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 148 | end += 16; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 149 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 150 | /* Dump the code around PC as: |
| 151 | * addr contents |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 152 | * 00008d34 fffffcd0 4c0eb530 b0934a0e 1c05447c |
| 153 | * 00008d44 f7ff18a0 490ced94 68035860 d0012b00 |
| 154 | */ |
| 155 | while (p <= end) { |
| 156 | int i; |
| 157 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 158 | sprintf(code_buffer, "%08x ", p); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 159 | for (i = 0; i < 4; i++) { |
| 160 | data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 161 | sprintf(code_buffer + strlen(code_buffer), "%08x ", data); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 162 | p += 4; |
| 163 | } |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 164 | _LOG(tfd, only_in_tombstone, "%s\n", code_buffer); |
| 165 | } |
| 166 | |
| 167 | if (frame0_pc_sane) { |
| 168 | _LOG(tfd, only_in_tombstone, "\ncode around lr:\n"); |
| 169 | |
| 170 | end = p = r.ARM_lr & ~3; |
| 171 | p -= 16; |
| 172 | end += 16; |
| 173 | |
| 174 | /* Dump the code around LR as: |
| 175 | * addr contents |
| 176 | * 00008d34 fffffcd0 4c0eb530 b0934a0e 1c05447c |
| 177 | * 00008d44 f7ff18a0 490ced94 68035860 d0012b00 |
| 178 | */ |
| 179 | while (p <= end) { |
| 180 | int i; |
| 181 | |
| 182 | sprintf(code_buffer, "%08x ", p); |
| 183 | for (i = 0; i < 4; i++) { |
| 184 | data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL); |
| 185 | sprintf(code_buffer + strlen(code_buffer), "%08x ", data); |
| 186 | p += 4; |
| 187 | } |
| 188 | _LOG(tfd, only_in_tombstone, "%s\n", code_buffer); |
| 189 | } |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | p = sp - 64; |
| 193 | p &= ~3; |
| 194 | if (unwind_depth != 0) { |
| 195 | if (unwind_depth < STACK_CONTENT_DEPTH) { |
| 196 | end = sp_list[unwind_depth-1]; |
| 197 | } |
| 198 | else { |
| 199 | end = sp_list[STACK_CONTENT_DEPTH-1]; |
| 200 | } |
| 201 | } |
| 202 | else { |
| 203 | end = sp | 0x000000ff; |
| 204 | end += 0xff; |
| 205 | } |
| 206 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 207 | _LOG(tfd, only_in_tombstone, "\nstack:\n"); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 208 | |
| 209 | /* If the crash is due to PC == 0, there will be two frames that |
| 210 | * have identical SP value. |
| 211 | */ |
| 212 | if (sp_list[0] == sp_list[1]) { |
| 213 | sp_depth = 1; |
| 214 | } |
| 215 | else { |
| 216 | sp_depth = 0; |
| 217 | } |
| 218 | |
| 219 | while (p <= end) { |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 220 | char *prompt; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 221 | char level[16]; |
| 222 | data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL); |
| 223 | if (p == sp_list[sp_depth]) { |
| 224 | sprintf(level, "#%02d", sp_depth++); |
| 225 | prompt = level; |
| 226 | } |
| 227 | else { |
| 228 | prompt = " "; |
| 229 | } |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 230 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 231 | /* Print the stack content in the log for the first 3 frames. For the |
| 232 | * rest only print them in the tombstone file. |
| 233 | */ |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 234 | _LOG(tfd, (sp_depth > 2) || only_in_tombstone, |
| 235 | "%s %08x %08x %s\n", prompt, p, data, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 236 | map_to_name(map, data, "")); |
| 237 | p += 4; |
| 238 | } |
| 239 | /* print another 64-byte of stack data after the last frame */ |
| 240 | |
| 241 | end = p+64; |
| 242 | while (p <= end) { |
| 243 | data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 244 | _LOG(tfd, (sp_depth > 2) || only_in_tombstone, |
| 245 | " %08x %08x %s\n", p, data, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 246 | map_to_name(map, data, "")); |
| 247 | p += 4; |
| 248 | } |
| 249 | } |
| 250 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 251 | void dump_pc_and_lr(int tfd, int pid, mapinfo *map, int unwound_level, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 252 | bool at_fault) |
| 253 | { |
| 254 | struct pt_regs r; |
| 255 | |
| 256 | if(ptrace(PTRACE_GETREGS, pid, 0, &r)) { |
| 257 | _LOG(tfd, !at_fault, "tid %d not responding!\n", pid); |
| 258 | return; |
| 259 | } |
| 260 | |
| 261 | if (unwound_level == 0) { |
| 262 | _LOG(tfd, !at_fault, " #%02d pc %08x %s\n", 0, r.ARM_pc, |
| 263 | map_to_name(map, r.ARM_pc, "<unknown>")); |
| 264 | } |
| 265 | _LOG(tfd, !at_fault, " #%02d lr %08x %s\n", 1, r.ARM_lr, |
| 266 | map_to_name(map, r.ARM_lr, "<unknown>")); |
| 267 | } |
| 268 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 269 | void dump_registers(int tfd, int pid, bool at_fault) |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 270 | { |
| 271 | struct pt_regs r; |
| 272 | bool only_in_tombstone = !at_fault; |
| 273 | |
| 274 | if(ptrace(PTRACE_GETREGS, pid, 0, &r)) { |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 275 | _LOG(tfd, only_in_tombstone, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 276 | "cannot get registers: %s\n", strerror(errno)); |
| 277 | return; |
| 278 | } |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 279 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 280 | _LOG(tfd, only_in_tombstone, " r0 %08x r1 %08x r2 %08x r3 %08x\n", |
| 281 | r.ARM_r0, r.ARM_r1, r.ARM_r2, r.ARM_r3); |
| 282 | _LOG(tfd, only_in_tombstone, " r4 %08x r5 %08x r6 %08x r7 %08x\n", |
| 283 | r.ARM_r4, r.ARM_r5, r.ARM_r6, r.ARM_r7); |
| 284 | _LOG(tfd, only_in_tombstone, " r8 %08x r9 %08x 10 %08x fp %08x\n", |
| 285 | r.ARM_r8, r.ARM_r9, r.ARM_r10, r.ARM_fp); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 286 | _LOG(tfd, only_in_tombstone, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 287 | " ip %08x sp %08x lr %08x pc %08x cpsr %08x\n", |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 288 | r.ARM_ip, r.ARM_sp, r.ARM_lr, r.ARM_pc, r.ARM_cpsr); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | const char *get_signame(int sig) |
| 292 | { |
| 293 | switch(sig) { |
| 294 | case SIGILL: return "SIGILL"; |
| 295 | case SIGABRT: return "SIGABRT"; |
| 296 | case SIGBUS: return "SIGBUS"; |
| 297 | case SIGFPE: return "SIGFPE"; |
| 298 | case SIGSEGV: return "SIGSEGV"; |
| 299 | case SIGSTKFLT: return "SIGSTKFLT"; |
| 300 | default: return "?"; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | void dump_fault_addr(int tfd, int pid, int sig) |
| 305 | { |
| 306 | siginfo_t si; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 307 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 308 | memset(&si, 0, sizeof(si)); |
| 309 | if(ptrace(PTRACE_GETSIGINFO, pid, 0, &si)){ |
| 310 | _LOG(tfd, false, "cannot get siginfo: %s\n", strerror(errno)); |
| 311 | } else { |
| 312 | _LOG(tfd, false, "signal %d (%s), fault addr %08x\n", |
| 313 | sig, get_signame(sig), si.si_addr); |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | void dump_crash_banner(int tfd, unsigned pid, unsigned tid, int sig) |
| 318 | { |
| 319 | char data[1024]; |
| 320 | char *x = 0; |
| 321 | FILE *fp; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 322 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 323 | sprintf(data, "/proc/%d/cmdline", pid); |
| 324 | fp = fopen(data, "r"); |
| 325 | if(fp) { |
| 326 | x = fgets(data, 1024, fp); |
| 327 | fclose(fp); |
| 328 | } |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 329 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 330 | _LOG(tfd, false, |
| 331 | "*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\n"); |
| 332 | dump_build_info(tfd); |
| 333 | _LOG(tfd, false, "pid: %d, tid: %d >>> %s <<<\n", |
| 334 | pid, tid, x ? x : "UNKNOWN"); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 335 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 336 | if(sig) dump_fault_addr(tfd, tid, sig); |
| 337 | } |
| 338 | |
Meng Hu | ae7b91b | 2009-11-05 16:10:50 -0600 | [diff] [blame^] | 339 | static void parse_elf_info(mapinfo *milist, pid_t pid) |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 340 | { |
| 341 | mapinfo *mi; |
| 342 | for (mi = milist; mi != NULL; mi = mi->next) { |
| 343 | Elf32_Ehdr ehdr; |
| 344 | |
| 345 | memset(&ehdr, 0, sizeof(Elf32_Ehdr)); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 346 | /* Read in sizeof(Elf32_Ehdr) worth of data from the beginning of |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 347 | * mapped section. |
| 348 | */ |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 349 | get_remote_struct(pid, (void *) (mi->start), &ehdr, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 350 | sizeof(Elf32_Ehdr)); |
| 351 | /* Check if it has the matching magic words */ |
| 352 | if (IS_ELF(ehdr)) { |
| 353 | Elf32_Phdr phdr; |
| 354 | Elf32_Phdr *ptr; |
| 355 | int i; |
| 356 | |
| 357 | ptr = (Elf32_Phdr *) (mi->start + ehdr.e_phoff); |
| 358 | for (i = 0; i < ehdr.e_phnum; i++) { |
| 359 | /* Parse the program header */ |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 360 | get_remote_struct(pid, (char *) ptr+i, &phdr, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 361 | sizeof(Elf32_Phdr)); |
| 362 | /* Found a EXIDX segment? */ |
| 363 | if (phdr.p_type == PT_ARM_EXIDX) { |
| 364 | mi->exidx_start = mi->start + phdr.p_offset; |
| 365 | mi->exidx_end = mi->exidx_start + phdr.p_filesz; |
| 366 | break; |
| 367 | } |
| 368 | } |
Meng Hu | ae7b91b | 2009-11-05 16:10:50 -0600 | [diff] [blame^] | 369 | |
| 370 | /* Try to load symbols from this file */ |
| 371 | mi->symbols = symbol_table_create(mi->name); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 372 | } |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | void dump_crash_report(int tfd, unsigned pid, unsigned tid, bool at_fault) |
| 377 | { |
| 378 | char data[1024]; |
| 379 | FILE *fp; |
| 380 | mapinfo *milist = 0; |
| 381 | unsigned int sp_list[STACK_CONTENT_DEPTH]; |
| 382 | int stack_depth; |
| 383 | int frame0_pc_sane = 1; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 384 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 385 | if (!at_fault) { |
| 386 | _LOG(tfd, true, |
| 387 | "--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n"); |
| 388 | _LOG(tfd, true, "pid: %d, tid: %d\n", pid, tid); |
| 389 | } |
| 390 | |
| 391 | dump_registers(tfd, tid, at_fault); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 392 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 393 | /* Clear stack pointer records */ |
| 394 | memset(sp_list, 0, sizeof(sp_list)); |
| 395 | |
| 396 | sprintf(data, "/proc/%d/maps", pid); |
| 397 | fp = fopen(data, "r"); |
| 398 | if(fp) { |
| 399 | while(fgets(data, 1024, fp)) { |
| 400 | mapinfo *mi = parse_maps_line(data); |
| 401 | if(mi) { |
| 402 | mi->next = milist; |
| 403 | milist = mi; |
| 404 | } |
| 405 | } |
| 406 | fclose(fp); |
| 407 | } |
| 408 | |
Meng Hu | ae7b91b | 2009-11-05 16:10:50 -0600 | [diff] [blame^] | 409 | parse_elf_info(milist, tid); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 410 | |
| 411 | /* If stack unwinder fails, use the default solution to dump the stack |
| 412 | * content. |
| 413 | */ |
| 414 | stack_depth = unwind_backtrace_with_ptrace(tfd, tid, milist, sp_list, |
| 415 | &frame0_pc_sane, at_fault); |
| 416 | |
| 417 | /* The stack unwinder should at least unwind two levels of stack. If less |
| 418 | * level is seen we make sure at lease pc and lr are dumped. |
| 419 | */ |
| 420 | if (stack_depth < 2) { |
| 421 | dump_pc_and_lr(tfd, tid, milist, stack_depth, at_fault); |
| 422 | } |
| 423 | |
| 424 | dump_stack_and_code(tfd, tid, milist, stack_depth, sp_list, frame0_pc_sane, |
| 425 | at_fault); |
| 426 | |
| 427 | while(milist) { |
| 428 | mapinfo *next = milist->next; |
Meng Hu | ae7b91b | 2009-11-05 16:10:50 -0600 | [diff] [blame^] | 429 | symbol_table_free(milist->symbols); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 430 | free(milist); |
| 431 | milist = next; |
| 432 | } |
| 433 | } |
| 434 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 435 | #define MAX_TOMBSTONES 10 |
| 436 | |
| 437 | #define typecheck(x,y) { \ |
| 438 | typeof(x) __dummy1; \ |
| 439 | typeof(y) __dummy2; \ |
| 440 | (void)(&__dummy1 == &__dummy2); } |
| 441 | |
| 442 | #define TOMBSTONE_DIR "/data/tombstones" |
| 443 | |
| 444 | /* |
| 445 | * find_and_open_tombstone - find an available tombstone slot, if any, of the |
| 446 | * form tombstone_XX where XX is 00 to MAX_TOMBSTONES-1, inclusive. If no |
| 447 | * file is available, we reuse the least-recently-modified file. |
| 448 | */ |
| 449 | static int find_and_open_tombstone(void) |
| 450 | { |
| 451 | unsigned long mtime = ULONG_MAX; |
| 452 | struct stat sb; |
| 453 | char path[128]; |
| 454 | int fd, i, oldest = 0; |
| 455 | |
| 456 | /* |
| 457 | * XXX: Our stat.st_mtime isn't time_t. If it changes, as it probably ought |
| 458 | * to, our logic breaks. This check will generate a warning if that happens. |
| 459 | */ |
| 460 | typecheck(mtime, sb.st_mtime); |
| 461 | |
| 462 | /* |
| 463 | * In a single wolf-like pass, find an available slot and, in case none |
| 464 | * exist, find and record the least-recently-modified file. |
| 465 | */ |
| 466 | for (i = 0; i < MAX_TOMBSTONES; i++) { |
| 467 | snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", i); |
| 468 | |
| 469 | if (!stat(path, &sb)) { |
| 470 | if (sb.st_mtime < mtime) { |
| 471 | oldest = i; |
| 472 | mtime = sb.st_mtime; |
| 473 | } |
| 474 | continue; |
| 475 | } |
| 476 | if (errno != ENOENT) |
| 477 | continue; |
| 478 | |
| 479 | fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0600); |
| 480 | if (fd < 0) |
| 481 | continue; /* raced ? */ |
| 482 | |
| 483 | fchown(fd, AID_SYSTEM, AID_SYSTEM); |
| 484 | return fd; |
| 485 | } |
| 486 | |
| 487 | /* we didn't find an available file, so we clobber the oldest one */ |
| 488 | snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", oldest); |
| 489 | fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600); |
| 490 | fchown(fd, AID_SYSTEM, AID_SYSTEM); |
| 491 | |
| 492 | return fd; |
| 493 | } |
| 494 | |
| 495 | /* Return true if some thread is not detached cleanly */ |
| 496 | static bool dump_sibling_thread_report(int tfd, unsigned pid, unsigned tid) |
| 497 | { |
| 498 | char task_path[1024]; |
| 499 | |
| 500 | sprintf(task_path, "/proc/%d/task", pid); |
| 501 | DIR *d; |
| 502 | struct dirent *de; |
| 503 | int need_cleanup = 0; |
| 504 | |
| 505 | d = opendir(task_path); |
| 506 | /* Bail early if cannot open the task directory */ |
| 507 | if (d == NULL) { |
| 508 | XLOG("Cannot open /proc/%d/task\n", pid); |
| 509 | return false; |
| 510 | } |
| 511 | while ((de = readdir(d)) != NULL) { |
| 512 | unsigned new_tid; |
| 513 | /* Ignore "." and ".." */ |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 514 | if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 515 | continue; |
| 516 | new_tid = atoi(de->d_name); |
| 517 | /* The main thread at fault has been handled individually */ |
| 518 | if (new_tid == tid) |
| 519 | continue; |
| 520 | |
| 521 | /* Skip this thread if cannot ptrace it */ |
| 522 | if (ptrace(PTRACE_ATTACH, new_tid, 0, 0) < 0) |
| 523 | continue; |
| 524 | |
| 525 | dump_crash_report(tfd, pid, new_tid, false); |
| 526 | need_cleanup |= ptrace(PTRACE_DETACH, new_tid, 0, 0); |
| 527 | } |
| 528 | closedir(d); |
| 529 | return need_cleanup != 0; |
| 530 | } |
| 531 | |
| 532 | /* Return true if some thread is not detached cleanly */ |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 533 | static bool engrave_tombstone(unsigned pid, unsigned tid, int debug_uid, |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 534 | int signal) |
| 535 | { |
| 536 | int fd; |
| 537 | bool need_cleanup = false; |
| 538 | |
| 539 | mkdir(TOMBSTONE_DIR, 0755); |
| 540 | chown(TOMBSTONE_DIR, AID_SYSTEM, AID_SYSTEM); |
| 541 | |
| 542 | fd = find_and_open_tombstone(); |
| 543 | if (fd < 0) |
| 544 | return need_cleanup; |
| 545 | |
| 546 | dump_crash_banner(fd, pid, tid, signal); |
| 547 | dump_crash_report(fd, pid, tid, true); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 548 | /* |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 549 | * If the user has requested to attach gdb, don't collect the per-thread |
| 550 | * information as it increases the chance to lose track of the process. |
| 551 | */ |
| 552 | if ((signed)pid > debug_uid) { |
| 553 | need_cleanup = dump_sibling_thread_report(fd, pid, tid); |
| 554 | } |
| 555 | |
| 556 | close(fd); |
| 557 | return need_cleanup; |
| 558 | } |
| 559 | |
| 560 | static int |
| 561 | write_string(const char* file, const char* string) |
| 562 | { |
| 563 | int len; |
| 564 | int fd; |
| 565 | ssize_t amt; |
| 566 | fd = open(file, O_RDWR); |
| 567 | len = strlen(string); |
| 568 | if (fd < 0) |
| 569 | return -errno; |
| 570 | amt = write(fd, string, len); |
| 571 | close(fd); |
| 572 | return amt >= 0 ? 0 : -errno; |
| 573 | } |
| 574 | |
| 575 | static |
| 576 | void init_debug_led(void) |
| 577 | { |
| 578 | // trout leds |
| 579 | write_string("/sys/class/leds/red/brightness", "0"); |
| 580 | write_string("/sys/class/leds/green/brightness", "0"); |
| 581 | write_string("/sys/class/leds/blue/brightness", "0"); |
| 582 | write_string("/sys/class/leds/red/device/blink", "0"); |
| 583 | // sardine leds |
| 584 | write_string("/sys/class/leds/left/cadence", "0,0"); |
| 585 | } |
| 586 | |
| 587 | static |
| 588 | void enable_debug_led(void) |
| 589 | { |
| 590 | // trout leds |
| 591 | write_string("/sys/class/leds/red/brightness", "255"); |
| 592 | // sardine leds |
| 593 | write_string("/sys/class/leds/left/cadence", "1,0"); |
| 594 | } |
| 595 | |
| 596 | static |
| 597 | void disable_debug_led(void) |
| 598 | { |
| 599 | // trout leds |
| 600 | write_string("/sys/class/leds/red/brightness", "0"); |
| 601 | // sardine leds |
| 602 | write_string("/sys/class/leds/left/cadence", "0,0"); |
| 603 | } |
| 604 | |
| 605 | extern int init_getevent(); |
| 606 | extern void uninit_getevent(); |
| 607 | extern int get_event(struct input_event* event, int timeout); |
| 608 | |
| 609 | static void wait_for_user_action(unsigned tid, struct ucred* cr) |
| 610 | { |
| 611 | (void)tid; |
| 612 | /* First log a helpful message */ |
| 613 | LOG( "********************************************************\n" |
| 614 | "* process %d crashed. debuggerd waiting for gdbserver \n" |
| 615 | "* \n" |
| 616 | "* adb shell gdbserver :port --attach %d & \n" |
| 617 | "* \n" |
| 618 | "* and press the HOME key. \n" |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 619 | "********************************************************\n", |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 620 | cr->pid, cr->pid); |
| 621 | |
| 622 | /* wait for HOME key */ |
| 623 | if (init_getevent() == 0) { |
| 624 | int ms = 1200 / 10; |
| 625 | int dit = 1; |
| 626 | int dah = 3*dit; |
| 627 | int _ = -dit; |
| 628 | int ___ = 3*_; |
| 629 | int _______ = 7*_; |
| 630 | const signed char codes[] = { |
| 631 | dit,_,dit,_,dit,___,dah,_,dah,_,dah,___,dit,_,dit,_,dit,_______ |
| 632 | }; |
| 633 | size_t s = 0; |
| 634 | struct input_event e; |
| 635 | int home = 0; |
| 636 | init_debug_led(); |
| 637 | enable_debug_led(); |
| 638 | do { |
| 639 | int timeout = abs((int)(codes[s])) * ms; |
| 640 | int res = get_event(&e, timeout); |
| 641 | if (res == 0) { |
| 642 | if (e.type==EV_KEY && e.code==KEY_HOME && e.value==0) |
| 643 | home = 1; |
| 644 | } else if (res == 1) { |
| 645 | if (++s >= sizeof(codes)/sizeof(*codes)) |
| 646 | s = 0; |
| 647 | if (codes[s] > 0) { |
| 648 | enable_debug_led(); |
| 649 | } else { |
| 650 | disable_debug_led(); |
| 651 | } |
| 652 | } |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 653 | } while (!home); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 654 | uninit_getevent(); |
| 655 | } |
| 656 | |
| 657 | /* don't forget to turn debug led off */ |
| 658 | disable_debug_led(); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 659 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 660 | /* close filedescriptor */ |
| 661 | LOG("debuggerd resuming process %d", cr->pid); |
| 662 | } |
| 663 | |
| 664 | static void handle_crashing_process(int fd) |
| 665 | { |
| 666 | char buf[64]; |
| 667 | struct stat s; |
| 668 | unsigned tid; |
| 669 | struct ucred cr; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 670 | int n, len, status; |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 671 | int tid_attach_status = -1; |
| 672 | unsigned retry = 30; |
| 673 | bool need_cleanup = false; |
| 674 | |
| 675 | char value[PROPERTY_VALUE_MAX]; |
| 676 | property_get("debug.db.uid", value, "-1"); |
| 677 | int debug_uid = atoi(value); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 678 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 679 | XLOG("handle_crashing_process(%d)\n", fd); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 680 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 681 | len = sizeof(cr); |
| 682 | n = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &len); |
| 683 | if(n != 0) { |
| 684 | LOG("cannot get credentials\n"); |
| 685 | goto done; |
| 686 | } |
| 687 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 688 | XLOG("reading tid\n"); |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 689 | fcntl(fd, F_SETFL, O_NONBLOCK); |
| 690 | while((n = read(fd, &tid, sizeof(unsigned))) != sizeof(unsigned)) { |
| 691 | if(errno == EINTR) continue; |
| 692 | if(errno == EWOULDBLOCK) { |
| 693 | if(retry-- > 0) { |
| 694 | usleep(100 * 1000); |
| 695 | continue; |
| 696 | } |
| 697 | LOG("timed out reading tid\n"); |
| 698 | goto done; |
| 699 | } |
| 700 | LOG("read failure? %s\n", strerror(errno)); |
| 701 | goto done; |
| 702 | } |
| 703 | |
| 704 | sprintf(buf,"/proc/%d/task/%d", cr.pid, tid); |
| 705 | if(stat(buf, &s)) { |
| 706 | LOG("tid %d does not exist in pid %d. ignorning debug request\n", |
| 707 | tid, cr.pid); |
| 708 | close(fd); |
| 709 | return; |
| 710 | } |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 711 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 712 | XLOG("BOOM: pid=%d uid=%d gid=%d tid=%d\n", cr.pid, cr.uid, cr.gid, tid); |
| 713 | |
| 714 | tid_attach_status = ptrace(PTRACE_ATTACH, tid, 0, 0); |
| 715 | if(tid_attach_status < 0) { |
| 716 | LOG("ptrace attach failed: %s\n", strerror(errno)); |
| 717 | goto done; |
| 718 | } |
| 719 | |
| 720 | close(fd); |
| 721 | fd = -1; |
| 722 | |
| 723 | for(;;) { |
| 724 | n = waitpid(tid, &status, __WALL); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 725 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 726 | if(n < 0) { |
| 727 | if(errno == EAGAIN) continue; |
| 728 | LOG("waitpid failed: %s\n", strerror(errno)); |
| 729 | goto done; |
| 730 | } |
| 731 | |
| 732 | XLOG("waitpid: n=%d status=%08x\n", n, status); |
| 733 | |
| 734 | if(WIFSTOPPED(status)){ |
| 735 | n = WSTOPSIG(status); |
| 736 | switch(n) { |
| 737 | case SIGSTOP: |
| 738 | XLOG("stopped -- continuing\n"); |
| 739 | n = ptrace(PTRACE_CONT, tid, 0, 0); |
| 740 | if(n) { |
| 741 | LOG("ptrace failed: %s\n", strerror(errno)); |
| 742 | goto done; |
| 743 | } |
| 744 | continue; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 745 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 746 | case SIGILL: |
| 747 | case SIGABRT: |
| 748 | case SIGBUS: |
| 749 | case SIGFPE: |
| 750 | case SIGSEGV: |
| 751 | case SIGSTKFLT: { |
| 752 | XLOG("stopped -- fatal signal\n"); |
| 753 | need_cleanup = engrave_tombstone(cr.pid, tid, debug_uid, n); |
| 754 | kill(tid, SIGSTOP); |
| 755 | goto done; |
| 756 | } |
| 757 | |
| 758 | default: |
| 759 | XLOG("stopped -- unexpected signal\n"); |
| 760 | goto done; |
| 761 | } |
| 762 | } else { |
| 763 | XLOG("unexpected waitpid response\n"); |
| 764 | goto done; |
| 765 | } |
| 766 | } |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 767 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 768 | done: |
| 769 | XLOG("detaching\n"); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 770 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 771 | /* stop the process so we can debug */ |
| 772 | kill(cr.pid, SIGSTOP); |
| 773 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 774 | /* |
| 775 | * If a thread has been attached by ptrace, make sure it is detached |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 776 | * successfully otherwise we will get a zombie. |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 777 | */ |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 778 | if (tid_attach_status == 0) { |
| 779 | int detach_status; |
| 780 | /* detach so we can attach gdbserver */ |
| 781 | detach_status = ptrace(PTRACE_DETACH, tid, 0, 0); |
| 782 | need_cleanup |= (detach_status != 0); |
| 783 | } |
| 784 | |
| 785 | /* |
| 786 | * if debug.db.uid is set, its value indicates if we should wait |
| 787 | * for user action for the crashing process. |
| 788 | * in this case, we log a message and turn the debug LED on |
| 789 | * waiting for a gdb connection (for instance) |
| 790 | */ |
| 791 | |
| 792 | if ((signed)cr.uid <= debug_uid) { |
| 793 | wait_for_user_action(tid, &cr); |
| 794 | } |
| 795 | |
| 796 | /* resume stopped process (so it can crash in peace) */ |
| 797 | kill(cr.pid, SIGCONT); |
| 798 | |
| 799 | if (need_cleanup) { |
| 800 | LOG("debuggerd committing suicide to free the zombie!\n"); |
| 801 | kill(getpid(), SIGKILL); |
| 802 | } |
| 803 | |
| 804 | if(fd != -1) close(fd); |
| 805 | } |
| 806 | |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 807 | int main() |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 808 | { |
| 809 | int s; |
| 810 | struct sigaction act; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 811 | |
| 812 | logsocket = socket_local_client("logd", |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 813 | ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_DGRAM); |
| 814 | if(logsocket < 0) { |
| 815 | logsocket = -1; |
| 816 | } else { |
| 817 | fcntl(logsocket, F_SETFD, FD_CLOEXEC); |
| 818 | } |
| 819 | |
| 820 | act.sa_handler = SIG_DFL; |
| 821 | sigemptyset(&act.sa_mask); |
| 822 | sigaddset(&act.sa_mask,SIGCHLD); |
| 823 | act.sa_flags = SA_NOCLDWAIT; |
| 824 | sigaction(SIGCHLD, &act, 0); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 825 | |
| 826 | s = socket_local_server("android:debuggerd", |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 827 | ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM); |
| 828 | if(s < 0) return -1; |
| 829 | fcntl(s, F_SETFD, FD_CLOEXEC); |
| 830 | |
| 831 | LOG("debuggerd: " __DATE__ " " __TIME__ "\n"); |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 832 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 833 | for(;;) { |
| 834 | struct sockaddr addr; |
| 835 | socklen_t alen; |
| 836 | int fd; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 837 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 838 | alen = sizeof(addr); |
| 839 | fd = accept(s, &addr, &alen); |
| 840 | if(fd < 0) continue; |
Ben Cheng | 09e7137 | 2009-09-28 11:06:09 -0700 | [diff] [blame] | 841 | |
The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 842 | fcntl(fd, F_SETFD, FD_CLOEXEC); |
| 843 | |
| 844 | handle_crashing_process(fd); |
| 845 | } |
| 846 | return 0; |
| 847 | } |