1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <dirent.h>
18 #include <errno.h>
19 #include <fcntl.h>
20 #include <limits.h>
21 #include <poll.h>
22 #include <signal.h>
23 #include <stdarg.h>
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <sys/inotify.h>
28 #include <sys/stat.h>
29 #include <sys/time.h>
30 #include <sys/wait.h>
31 #include <sys/klog.h>
32 #include <time.h>
33 #include <unistd.h>
34
35 #include <cutils/debugger.h>
36 #include <cutils/properties.h>
37 #include <cutils/sockets.h>
38 #include <private/android_filesystem_config.h>
39
40 #include "dumpstate.h"
41
42 /* list of native processes to include in the native dumps */
43 static const char* native_processes_to_dump[] = {
44 "/system/bin/drmserver",
45 "/system/bin/mediaserver",
46 "/system/bin/sdcard",
47 "/system/bin/surfaceflinger",
48 NULL,
49 };
50
for_each_pid(void (* func)(int,const char *),const char * header)51 void for_each_pid(void (*func)(int, const char *), const char *header) {
52 DIR *d;
53 struct dirent *de;
54
55 if (!(d = opendir("/proc"))) {
56 printf("Failed to open /proc (%s)\n", strerror(errno));
57 return;
58 }
59
60 printf("\n------ %s ------\n", header);
61 while ((de = readdir(d))) {
62 int pid;
63 int fd;
64 char cmdpath[255];
65 char cmdline[255];
66
67 if (!(pid = atoi(de->d_name))) {
68 continue;
69 }
70
71 sprintf(cmdpath,"/proc/%d/cmdline", pid);
72 memset(cmdline, 0, sizeof(cmdline));
73 if ((fd = open(cmdpath, O_RDONLY)) < 0) {
74 strcpy(cmdline, "N/A");
75 } else {
76 read(fd, cmdline, sizeof(cmdline));
77 close(fd);
78 }
79 func(pid, cmdline);
80 }
81
82 closedir(d);
83 }
84
show_wchan(int pid,const char * name)85 void show_wchan(int pid, const char *name) {
86 char path[255];
87 char buffer[255];
88 int fd;
89
90 memset(buffer, 0, sizeof(buffer));
91
92 sprintf(path, "/proc/%d/wchan", pid);
93 if ((fd = open(path, O_RDONLY)) < 0) {
94 printf("Failed to open '%s' (%s)\n", path, strerror(errno));
95 return;
96 }
97
98 if (read(fd, buffer, sizeof(buffer)) < 0) {
99 printf("Failed to read '%s' (%s)\n", path, strerror(errno));
100 goto out_close;
101 }
102
103 printf("%-7d %-32s %s\n", pid, name, buffer);
104
105 out_close:
106 close(fd);
107 return;
108 }
109
do_dmesg()110 void do_dmesg() {
111 printf("------ KERNEL LOG (dmesg) ------\n");
112 /* Get size of kernel buffer */
113 int size = klogctl(KLOG_SIZE_BUFFER, NULL, 0);
114 if (size <= 0) {
115 printf("Unexpected klogctl return value: %d\n\n", size);
116 return;
117 }
118 char *buf = (char *) malloc(size + 1);
119 if (buf == NULL) {
120 printf("memory allocation failed\n\n");
121 return;
122 }
123 int retval = klogctl(KLOG_READ_ALL, buf, size);
124 if (retval < 0) {
125 printf("klogctl failure\n\n");
126 free(buf);
127 return;
128 }
129 buf[retval] = '\0';
130 printf("%s\n\n", buf);
131 free(buf);
132 return;
133 }
134
do_showmap(int pid,const char * name)135 void do_showmap(int pid, const char *name) {
136 char title[255];
137 char arg[255];
138
139 sprintf(title, "SHOW MAP %d (%s)", pid, name);
140 sprintf(arg, "%d", pid);
141 run_command(title, 10, SU_PATH, "root", "showmap", arg, NULL);
142 }
143
144 /* prints the contents of a file */
dump_file(const char * title,const char * path)145 int dump_file(const char *title, const char* path) {
146 char buffer[32768];
147 int fd = open(path, O_RDONLY);
148 if (fd < 0) {
149 int err = errno;
150 if (title) printf("------ %s (%s) ------\n", title, path);
151 printf("*** %s: %s\n", path, strerror(err));
152 if (title) printf("\n");
153 return -1;
154 }
155
156 if (title) printf("------ %s (%s", title, path);
157
158 if (title) {
159 struct stat st;
160 if (memcmp(path, "/proc/", 6) && memcmp(path, "/sys/", 5) && !fstat(fd, &st)) {
161 char stamp[80];
162 time_t mtime = st.st_mtime;
163 strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime));
164 printf(": %s", stamp);
165 }
166 printf(") ------\n");
167 }
168
169 int newline = 0;
170 for (;;) {
171 int ret = read(fd, buffer, sizeof(buffer));
172 if (ret > 0) {
173 newline = (buffer[ret - 1] == '\n');
174 ret = fwrite(buffer, ret, 1, stdout);
175 }
176 if (ret <= 0) break;
177 }
178
179 close(fd);
180 if (!newline) printf("\n");
181 if (title) printf("\n");
182 return 0;
183 }
184
185 /* forks a command and waits for it to finish */
run_command(const char * title,int timeout_seconds,const char * command,...)186 int run_command(const char *title, int timeout_seconds, const char *command, ...) {
187 fflush(stdout);
188 clock_t start = clock();
189 pid_t pid = fork();
190
191 /* handle error case */
192 if (pid < 0) {
193 printf("*** fork: %s\n", strerror(errno));
194 return pid;
195 }
196
197 /* handle child case */
198 if (pid == 0) {
199 const char *args[1024] = {command};
200 size_t arg;
201
202 va_list ap;
203 va_start(ap, command);
204 if (title) printf("------ %s (%s", title, command);
205 for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) {
206 args[arg] = va_arg(ap, const char *);
207 if (args[arg] == NULL) break;
208 if (title) printf(" %s", args[arg]);
209 }
210 if (title) printf(") ------\n");
211 fflush(stdout);
212
213 execvp(command, (char**) args);
214 printf("*** exec(%s): %s\n", command, strerror(errno));
215 fflush(stdout);
216 _exit(-1);
217 }
218
219 /* handle parent case */
220 for (;;) {
221 int status;
222 pid_t p = waitpid(pid, &status, WNOHANG);
223 float elapsed = (float) (clock() - start) / CLOCKS_PER_SEC;
224 if (p == pid) {
225 if (WIFSIGNALED(status)) {
226 printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status));
227 } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) {
228 printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status));
229 }
230 if (title) printf("[%s: %.1fs elapsed]\n\n", command, elapsed);
231 return status;
232 }
233
234 if (timeout_seconds && elapsed > timeout_seconds) {
235 printf("*** %s: Timed out after %.1fs (killing pid %d)\n", command, elapsed, pid);
236 kill(pid, SIGTERM);
237 return -1;
238 }
239
240 usleep(100000); // poll every 0.1 sec
241 }
242 }
243
244 size_t num_props = 0;
245 static char* props[2000];
246
print_prop(const char * key,const char * name,void * user)247 static void print_prop(const char *key, const char *name, void *user) {
248 (void) user;
249 if (num_props < sizeof(props) / sizeof(props[0])) {
250 char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10];
251 snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name);
252 props[num_props++] = strdup(buf);
253 }
254 }
255
compare_prop(const void * a,const void * b)256 static int compare_prop(const void *a, const void *b) {
257 return strcmp(*(char * const *) a, *(char * const *) b);
258 }
259
260 /* prints all the system properties */
print_properties()261 void print_properties() {
262 size_t i;
263 num_props = 0;
264 property_list(print_prop, NULL);
265 qsort(&props, num_props, sizeof(props[0]), compare_prop);
266
267 printf("------ SYSTEM PROPERTIES ------\n");
268 for (i = 0; i < num_props; ++i) {
269 fputs(props[i], stdout);
270 free(props[i]);
271 }
272 printf("\n");
273 }
274
275 /* redirect output to a service control socket */
redirect_to_socket(FILE * redirect,const char * service)276 void redirect_to_socket(FILE *redirect, const char *service) {
277 int s = android_get_control_socket(service);
278 if (s < 0) {
279 fprintf(stderr, "android_get_control_socket(%s): %s\n", service, strerror(errno));
280 exit(1);
281 }
282 if (listen(s, 4) < 0) {
283 fprintf(stderr, "listen(control socket): %s\n", strerror(errno));
284 exit(1);
285 }
286
287 struct sockaddr addr;
288 socklen_t alen = sizeof(addr);
289 int fd = accept(s, &addr, &alen);
290 if (fd < 0) {
291 fprintf(stderr, "accept(control socket): %s\n", strerror(errno));
292 exit(1);
293 }
294
295 fflush(redirect);
296 dup2(fd, fileno(redirect));
297 close(fd);
298 }
299
300 /* redirect output to a file, optionally gzipping; returns gzip pid (or -1) */
redirect_to_file(FILE * redirect,char * path,int gzip_level)301 pid_t redirect_to_file(FILE *redirect, char *path, int gzip_level) {
302 char *chp = path;
303
304 /* skip initial slash */
305 if (chp[0] == '/')
306 chp++;
307
308 /* create leading directories, if necessary */
309 while (chp && chp[0]) {
310 chp = strchr(chp, '/');
311 if (chp) {
312 *chp = 0;
313 mkdir(path, 0775); /* drwxrwxr-x */
314 *chp++ = '/';
315 }
316 }
317
318 int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
319 if (fd < 0) {
320 fprintf(stderr, "%s: %s\n", path, strerror(errno));
321 exit(1);
322 }
323
324 pid_t gzip_pid = -1;
325 if (gzip_level > 0) {
326 int fds[2];
327 if (pipe(fds)) {
328 fprintf(stderr, "pipe: %s\n", strerror(errno));
329 exit(1);
330 }
331
332 fflush(redirect);
333 fflush(stdout);
334
335 gzip_pid = fork();
336 if (gzip_pid < 0) {
337 fprintf(stderr, "fork: %s\n", strerror(errno));
338 exit(1);
339 }
340
341 if (gzip_pid == 0) {
342 dup2(fds[0], STDIN_FILENO);
343 dup2(fd, STDOUT_FILENO);
344
345 close(fd);
346 close(fds[0]);
347 close(fds[1]);
348
349 char level[10];
350 snprintf(level, sizeof(level), "-%d", gzip_level);
351 execlp("gzip", "gzip", level, NULL);
352 fprintf(stderr, "exec(gzip): %s\n", strerror(errno));
353 _exit(-1);
354 }
355
356 close(fd);
357 close(fds[0]);
358 fd = fds[1];
359 }
360
361 dup2(fd, fileno(redirect));
362 close(fd);
363 return gzip_pid;
364 }
365
should_dump_native_traces(const char * path)366 static bool should_dump_native_traces(const char* path) {
367 for (const char** p = native_processes_to_dump; *p; p++) {
368 if (!strcmp(*p, path)) {
369 return true;
370 }
371 }
372 return false;
373 }
374
375 /* dump Dalvik and native stack traces, return the trace file location (NULL if none) */
dump_traces()376 const char *dump_traces() {
377 const char* result = NULL;
378
379 char traces_path[PROPERTY_VALUE_MAX] = "";
380 property_get("dalvik.vm.stack-trace-file", traces_path, "");
381 if (!traces_path[0]) return NULL;
382
383 /* move the old traces.txt (if any) out of the way temporarily */
384 char anr_traces_path[PATH_MAX];
385 strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path));
386 strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path));
387 if (rename(traces_path, anr_traces_path) && errno != ENOENT) {
388 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno));
389 return NULL; // Can't rename old traces.txt -- no permission? -- leave it alone instead
390 }
391
392 /* make the directory if necessary */
393 char anr_traces_dir[PATH_MAX];
394 strlcpy(anr_traces_dir, traces_path, sizeof(anr_traces_dir));
395 char *slash = strrchr(anr_traces_dir, '/');
396 if (slash != NULL) {
397 *slash = '\0';
398 if (!mkdir(anr_traces_dir, 0775)) {
399 chown(anr_traces_dir, AID_SYSTEM, AID_SYSTEM);
400 chmod(anr_traces_dir, 0775);
401 } else if (errno != EEXIST) {
402 fprintf(stderr, "mkdir(%s): %s\n", anr_traces_dir, strerror(errno));
403 return NULL;
404 }
405 }
406
407 /* create a new, empty traces.txt file to receive stack dumps */
408 int fd = open(traces_path, O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW, 0666); /* -rw-rw-rw- */
409 if (fd < 0) {
410 fprintf(stderr, "%s: %s\n", traces_path, strerror(errno));
411 return NULL;
412 }
413 int chmod_ret = fchmod(fd, 0666);
414 if (chmod_ret < 0) {
415 fprintf(stderr, "fchmod on %s failed: %s\n", traces_path, strerror(errno));
416 close(fd);
417 return NULL;
418 }
419
420 /* walk /proc and kill -QUIT all Dalvik processes */
421 DIR *proc = opendir("/proc");
422 if (proc == NULL) {
423 fprintf(stderr, "/proc: %s\n", strerror(errno));
424 goto error_close_fd;
425 }
426
427 /* use inotify to find when processes are done dumping */
428 int ifd = inotify_init();
429 if (ifd < 0) {
430 fprintf(stderr, "inotify_init: %s\n", strerror(errno));
431 goto error_close_fd;
432 }
433
434 int wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE);
435 if (wfd < 0) {
436 fprintf(stderr, "inotify_add_watch(%s): %s\n", traces_path, strerror(errno));
437 goto error_close_ifd;
438 }
439
440 struct dirent *d;
441 int dalvik_found = 0;
442 while ((d = readdir(proc))) {
443 int pid = atoi(d->d_name);
444 if (pid <= 0) continue;
445
446 char path[PATH_MAX];
447 char data[PATH_MAX];
448 snprintf(path, sizeof(path), "/proc/%d/exe", pid);
449 ssize_t len = readlink(path, data, sizeof(data) - 1);
450 if (len <= 0) {
451 continue;
452 }
453 data[len] = '\0';
454
455 if (!strcmp(data, "/system/bin/app_process")) {
456 /* skip zygote -- it won't dump its stack anyway */
457 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
458 int fd = open(path, O_RDONLY);
459 len = read(fd, data, sizeof(data) - 1);
460 close(fd);
461 if (len <= 0) {
462 continue;
463 }
464 data[len] = '\0';
465 if (!strcmp(data, "zygote")) {
466 continue;
467 }
468
469 ++dalvik_found;
470 if (kill(pid, SIGQUIT)) {
471 fprintf(stderr, "kill(%d, SIGQUIT): %s\n", pid, strerror(errno));
472 continue;
473 }
474
475 /* wait for the writable-close notification from inotify */
476 struct pollfd pfd = { ifd, POLLIN, 0 };
477 int ret = poll(&pfd, 1, 200); /* 200 msec timeout */
478 if (ret < 0) {
479 fprintf(stderr, "poll: %s\n", strerror(errno));
480 } else if (ret == 0) {
481 fprintf(stderr, "warning: timed out dumping pid %d\n", pid);
482 } else {
483 struct inotify_event ie;
484 read(ifd, &ie, sizeof(ie));
485 }
486 } else if (should_dump_native_traces(data)) {
487 /* dump native process if appropriate */
488 if (lseek(fd, 0, SEEK_END) < 0) {
489 fprintf(stderr, "lseek: %s\n", strerror(errno));
490 } else {
491 dump_backtrace_to_file(pid, fd);
492 }
493 }
494 }
495
496 if (dalvik_found == 0) {
497 fprintf(stderr, "Warning: no Dalvik processes found to dump stacks\n");
498 }
499
500 static char dump_traces_path[PATH_MAX];
501 strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path));
502 strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path));
503 if (rename(traces_path, dump_traces_path)) {
504 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno));
505 goto error_close_ifd;
506 }
507 result = dump_traces_path;
508
509 /* replace the saved [ANR] traces.txt file */
510 rename(anr_traces_path, traces_path);
511
512 error_close_ifd:
513 close(ifd);
514 error_close_fd:
515 close(fd);
516 return result;
517 }
518
play_sound(const char * path)519 void play_sound(const char* path) {
520 run_command(NULL, 5, "/system/bin/stagefright", "-o", "-a", path, NULL);
521 }
522