blob: 5b8ed49e63a5dcad6edb64fb4629e849b07dc06d [file] [log] [blame]
Colin Crossf45fa6b2012-03-26 12:38:26 -07001/*
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>
John Michelaue7b6cf12013-03-07 15:35:35 -060034#include <sys/prctl.h>
Colin Crossf45fa6b2012-03-26 12:38:26 -070035
Jeff Brownbf7f4922012-06-07 16:40:01 -070036#include <cutils/debugger.h>
Colin Crossf45fa6b2012-03-26 12:38:26 -070037#include <cutils/properties.h>
38#include <cutils/sockets.h>
39#include <private/android_filesystem_config.h>
40
Robert Craig95798372013-04-04 06:33:10 -040041#include <selinux/android.h>
42
Colin Crossf45fa6b2012-03-26 12:38:26 -070043#include "dumpstate.h"
44
Jeff Brownbf7f4922012-06-07 16:40:01 -070045/* list of native processes to include in the native dumps */
46static const char* native_processes_to_dump[] = {
James Dong1fc4f802012-09-10 16:08:48 -070047 "/system/bin/drmserver",
Jeff Brownbf7f4922012-06-07 16:40:01 -070048 "/system/bin/mediaserver",
49 "/system/bin/sdcard",
50 "/system/bin/surfaceflinger",
51 NULL,
52};
53
Colin Crossf45fa6b2012-03-26 12:38:26 -070054void for_each_pid(void (*func)(int, const char *), const char *header) {
55 DIR *d;
56 struct dirent *de;
57
58 if (!(d = opendir("/proc"))) {
59 printf("Failed to open /proc (%s)\n", strerror(errno));
60 return;
61 }
62
63 printf("\n------ %s ------\n", header);
64 while ((de = readdir(d))) {
65 int pid;
66 int fd;
67 char cmdpath[255];
68 char cmdline[255];
69
70 if (!(pid = atoi(de->d_name))) {
71 continue;
72 }
73
74 sprintf(cmdpath,"/proc/%d/cmdline", pid);
75 memset(cmdline, 0, sizeof(cmdline));
76 if ((fd = open(cmdpath, O_RDONLY)) < 0) {
77 strcpy(cmdline, "N/A");
78 } else {
79 read(fd, cmdline, sizeof(cmdline));
80 close(fd);
81 }
82 func(pid, cmdline);
83 }
84
85 closedir(d);
86}
87
88void show_wchan(int pid, const char *name) {
89 char path[255];
90 char buffer[255];
91 int fd;
92
93 memset(buffer, 0, sizeof(buffer));
94
95 sprintf(path, "/proc/%d/wchan", pid);
96 if ((fd = open(path, O_RDONLY)) < 0) {
97 printf("Failed to open '%s' (%s)\n", path, strerror(errno));
98 return;
99 }
100
101 if (read(fd, buffer, sizeof(buffer)) < 0) {
102 printf("Failed to read '%s' (%s)\n", path, strerror(errno));
103 goto out_close;
104 }
105
106 printf("%-7d %-32s %s\n", pid, name, buffer);
107
108out_close:
109 close(fd);
110 return;
111}
112
113void do_dmesg() {
114 printf("------ KERNEL LOG (dmesg) ------\n");
Elliott Hughes5f87b312012-09-17 11:43:40 -0700115 /* Get size of kernel buffer */
116 int size = klogctl(KLOG_SIZE_BUFFER, NULL, 0);
Colin Crossf45fa6b2012-03-26 12:38:26 -0700117 if (size <= 0) {
118 printf("Unexpected klogctl return value: %d\n\n", size);
119 return;
120 }
121 char *buf = (char *) malloc(size + 1);
122 if (buf == NULL) {
123 printf("memory allocation failed\n\n");
124 return;
125 }
126 int retval = klogctl(KLOG_READ_ALL, buf, size);
127 if (retval < 0) {
128 printf("klogctl failure\n\n");
129 free(buf);
130 return;
131 }
132 buf[retval] = '\0';
133 printf("%s\n\n", buf);
134 free(buf);
135 return;
136}
137
138void do_showmap(int pid, const char *name) {
139 char title[255];
140 char arg[255];
141
142 sprintf(title, "SHOW MAP %d (%s)", pid, name);
143 sprintf(arg, "%d", pid);
144 run_command(title, 10, SU_PATH, "root", "showmap", arg, NULL);
145}
146
147/* prints the contents of a file */
148int dump_file(const char *title, const char* path) {
149 char buffer[32768];
150 int fd = open(path, O_RDONLY);
151 if (fd < 0) {
152 int err = errno;
153 if (title) printf("------ %s (%s) ------\n", title, path);
154 printf("*** %s: %s\n", path, strerror(err));
155 if (title) printf("\n");
156 return -1;
157 }
158
159 if (title) printf("------ %s (%s", title, path);
160
161 if (title) {
162 struct stat st;
163 if (memcmp(path, "/proc/", 6) && memcmp(path, "/sys/", 5) && !fstat(fd, &st)) {
164 char stamp[80];
165 time_t mtime = st.st_mtime;
166 strftime(stamp, sizeof(stamp), "%Y-%m-%d %H:%M:%S", localtime(&mtime));
167 printf(": %s", stamp);
168 }
169 printf(") ------\n");
170 }
171
172 int newline = 0;
173 for (;;) {
174 int ret = read(fd, buffer, sizeof(buffer));
175 if (ret > 0) {
176 newline = (buffer[ret - 1] == '\n');
177 ret = fwrite(buffer, ret, 1, stdout);
178 }
179 if (ret <= 0) break;
180 }
181
182 close(fd);
183 if (!newline) printf("\n");
184 if (title) printf("\n");
185 return 0;
186}
187
188/* forks a command and waits for it to finish */
189int run_command(const char *title, int timeout_seconds, const char *command, ...) {
190 fflush(stdout);
191 clock_t start = clock();
192 pid_t pid = fork();
193
194 /* handle error case */
195 if (pid < 0) {
196 printf("*** fork: %s\n", strerror(errno));
197 return pid;
198 }
199
200 /* handle child case */
201 if (pid == 0) {
202 const char *args[1024] = {command};
203 size_t arg;
204
John Michelaue7b6cf12013-03-07 15:35:35 -0600205 /* make sure the child dies when dumpstate dies */
206 prctl(PR_SET_PDEATHSIG, SIGKILL);
207
Colin Crossf45fa6b2012-03-26 12:38:26 -0700208 va_list ap;
209 va_start(ap, command);
210 if (title) printf("------ %s (%s", title, command);
211 for (arg = 1; arg < sizeof(args) / sizeof(args[0]); ++arg) {
212 args[arg] = va_arg(ap, const char *);
213 if (args[arg] == NULL) break;
214 if (title) printf(" %s", args[arg]);
215 }
216 if (title) printf(") ------\n");
217 fflush(stdout);
218
219 execvp(command, (char**) args);
220 printf("*** exec(%s): %s\n", command, strerror(errno));
221 fflush(stdout);
222 _exit(-1);
223 }
224
225 /* handle parent case */
226 for (;;) {
227 int status;
228 pid_t p = waitpid(pid, &status, WNOHANG);
229 float elapsed = (float) (clock() - start) / CLOCKS_PER_SEC;
230 if (p == pid) {
231 if (WIFSIGNALED(status)) {
232 printf("*** %s: Killed by signal %d\n", command, WTERMSIG(status));
233 } else if (WIFEXITED(status) && WEXITSTATUS(status) > 0) {
234 printf("*** %s: Exit code %d\n", command, WEXITSTATUS(status));
235 }
236 if (title) printf("[%s: %.1fs elapsed]\n\n", command, elapsed);
237 return status;
238 }
239
240 if (timeout_seconds && elapsed > timeout_seconds) {
241 printf("*** %s: Timed out after %.1fs (killing pid %d)\n", command, elapsed, pid);
242 kill(pid, SIGTERM);
243 return -1;
244 }
245
246 usleep(100000); // poll every 0.1 sec
247 }
248}
249
250size_t num_props = 0;
251static char* props[2000];
252
253static void print_prop(const char *key, const char *name, void *user) {
254 (void) user;
255 if (num_props < sizeof(props) / sizeof(props[0])) {
256 char buf[PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 10];
257 snprintf(buf, sizeof(buf), "[%s]: [%s]\n", key, name);
258 props[num_props++] = strdup(buf);
259 }
260}
261
262static int compare_prop(const void *a, const void *b) {
263 return strcmp(*(char * const *) a, *(char * const *) b);
264}
265
266/* prints all the system properties */
267void print_properties() {
268 size_t i;
269 num_props = 0;
270 property_list(print_prop, NULL);
271 qsort(&props, num_props, sizeof(props[0]), compare_prop);
272
273 printf("------ SYSTEM PROPERTIES ------\n");
274 for (i = 0; i < num_props; ++i) {
275 fputs(props[i], stdout);
276 free(props[i]);
277 }
278 printf("\n");
279}
280
281/* redirect output to a service control socket */
282void redirect_to_socket(FILE *redirect, const char *service) {
283 int s = android_get_control_socket(service);
284 if (s < 0) {
285 fprintf(stderr, "android_get_control_socket(%s): %s\n", service, strerror(errno));
286 exit(1);
287 }
288 if (listen(s, 4) < 0) {
289 fprintf(stderr, "listen(control socket): %s\n", strerror(errno));
290 exit(1);
291 }
292
293 struct sockaddr addr;
294 socklen_t alen = sizeof(addr);
295 int fd = accept(s, &addr, &alen);
296 if (fd < 0) {
297 fprintf(stderr, "accept(control socket): %s\n", strerror(errno));
298 exit(1);
299 }
300
301 fflush(redirect);
302 dup2(fd, fileno(redirect));
303 close(fd);
304}
305
306/* redirect output to a file, optionally gzipping; returns gzip pid (or -1) */
307pid_t redirect_to_file(FILE *redirect, char *path, int gzip_level) {
308 char *chp = path;
309
310 /* skip initial slash */
311 if (chp[0] == '/')
312 chp++;
313
314 /* create leading directories, if necessary */
315 while (chp && chp[0]) {
316 chp = strchr(chp, '/');
317 if (chp) {
318 *chp = 0;
319 mkdir(path, 0775); /* drwxrwxr-x */
320 *chp++ = '/';
321 }
322 }
323
324 int fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
325 if (fd < 0) {
326 fprintf(stderr, "%s: %s\n", path, strerror(errno));
327 exit(1);
328 }
329
330 pid_t gzip_pid = -1;
331 if (gzip_level > 0) {
332 int fds[2];
333 if (pipe(fds)) {
334 fprintf(stderr, "pipe: %s\n", strerror(errno));
335 exit(1);
336 }
337
338 fflush(redirect);
339 fflush(stdout);
340
341 gzip_pid = fork();
342 if (gzip_pid < 0) {
343 fprintf(stderr, "fork: %s\n", strerror(errno));
344 exit(1);
345 }
346
347 if (gzip_pid == 0) {
348 dup2(fds[0], STDIN_FILENO);
349 dup2(fd, STDOUT_FILENO);
350
351 close(fd);
352 close(fds[0]);
353 close(fds[1]);
354
355 char level[10];
356 snprintf(level, sizeof(level), "-%d", gzip_level);
357 execlp("gzip", "gzip", level, NULL);
358 fprintf(stderr, "exec(gzip): %s\n", strerror(errno));
359 _exit(-1);
360 }
361
362 close(fd);
363 close(fds[0]);
364 fd = fds[1];
365 }
366
367 dup2(fd, fileno(redirect));
368 close(fd);
369 return gzip_pid;
370}
371
Jeff Brownbf7f4922012-06-07 16:40:01 -0700372static bool should_dump_native_traces(const char* path) {
373 for (const char** p = native_processes_to_dump; *p; p++) {
374 if (!strcmp(*p, path)) {
375 return true;
376 }
377 }
378 return false;
379}
380
381/* dump Dalvik and native stack traces, return the trace file location (NULL if none) */
382const char *dump_traces() {
383 const char* result = NULL;
384
Colin Crossf45fa6b2012-03-26 12:38:26 -0700385 char traces_path[PROPERTY_VALUE_MAX] = "";
386 property_get("dalvik.vm.stack-trace-file", traces_path, "");
387 if (!traces_path[0]) return NULL;
388
389 /* move the old traces.txt (if any) out of the way temporarily */
390 char anr_traces_path[PATH_MAX];
391 strlcpy(anr_traces_path, traces_path, sizeof(anr_traces_path));
392 strlcat(anr_traces_path, ".anr", sizeof(anr_traces_path));
393 if (rename(traces_path, anr_traces_path) && errno != ENOENT) {
394 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, anr_traces_path, strerror(errno));
395 return NULL; // Can't rename old traces.txt -- no permission? -- leave it alone instead
396 }
397
398 /* make the directory if necessary */
399 char anr_traces_dir[PATH_MAX];
400 strlcpy(anr_traces_dir, traces_path, sizeof(anr_traces_dir));
401 char *slash = strrchr(anr_traces_dir, '/');
402 if (slash != NULL) {
403 *slash = '\0';
404 if (!mkdir(anr_traces_dir, 0775)) {
405 chown(anr_traces_dir, AID_SYSTEM, AID_SYSTEM);
Nick Kralevichc7f1fe22012-04-06 09:31:28 -0700406 chmod(anr_traces_dir, 0775);
Robert Craig95798372013-04-04 06:33:10 -0400407 if (selinux_android_restorecon(anr_traces_dir) == -1) {
408 fprintf(stderr, "restorecon failed for %s: %s\n", anr_traces_dir, strerror(errno));
409 }
Colin Crossf45fa6b2012-03-26 12:38:26 -0700410 } else if (errno != EEXIST) {
411 fprintf(stderr, "mkdir(%s): %s\n", anr_traces_dir, strerror(errno));
412 return NULL;
413 }
414 }
415
416 /* create a new, empty traces.txt file to receive stack dumps */
Nick Kralevichd51820e2012-04-06 09:53:45 -0700417 int fd = open(traces_path, O_CREAT | O_WRONLY | O_TRUNC | O_NOFOLLOW, 0666); /* -rw-rw-rw- */
Colin Crossf45fa6b2012-03-26 12:38:26 -0700418 if (fd < 0) {
419 fprintf(stderr, "%s: %s\n", traces_path, strerror(errno));
420 return NULL;
421 }
Nick Kralevichc7f1fe22012-04-06 09:31:28 -0700422 int chmod_ret = fchmod(fd, 0666);
423 if (chmod_ret < 0) {
424 fprintf(stderr, "fchmod on %s failed: %s\n", traces_path, strerror(errno));
425 close(fd);
426 return NULL;
427 }
Colin Crossf45fa6b2012-03-26 12:38:26 -0700428
429 /* walk /proc and kill -QUIT all Dalvik processes */
430 DIR *proc = opendir("/proc");
431 if (proc == NULL) {
432 fprintf(stderr, "/proc: %s\n", strerror(errno));
Jeff Brownbf7f4922012-06-07 16:40:01 -0700433 goto error_close_fd;
Colin Crossf45fa6b2012-03-26 12:38:26 -0700434 }
435
436 /* use inotify to find when processes are done dumping */
437 int ifd = inotify_init();
438 if (ifd < 0) {
439 fprintf(stderr, "inotify_init: %s\n", strerror(errno));
Jeff Brownbf7f4922012-06-07 16:40:01 -0700440 goto error_close_fd;
Colin Crossf45fa6b2012-03-26 12:38:26 -0700441 }
442
443 int wfd = inotify_add_watch(ifd, traces_path, IN_CLOSE_WRITE);
444 if (wfd < 0) {
445 fprintf(stderr, "inotify_add_watch(%s): %s\n", traces_path, strerror(errno));
Jeff Brownbf7f4922012-06-07 16:40:01 -0700446 goto error_close_ifd;
Colin Crossf45fa6b2012-03-26 12:38:26 -0700447 }
448
449 struct dirent *d;
450 int dalvik_found = 0;
451 while ((d = readdir(proc))) {
452 int pid = atoi(d->d_name);
453 if (pid <= 0) continue;
454
Jeff Brownbf7f4922012-06-07 16:40:01 -0700455 char path[PATH_MAX];
456 char data[PATH_MAX];
Colin Crossf45fa6b2012-03-26 12:38:26 -0700457 snprintf(path, sizeof(path), "/proc/%d/exe", pid);
Jeff Brownbf7f4922012-06-07 16:40:01 -0700458 ssize_t len = readlink(path, data, sizeof(data) - 1);
459 if (len <= 0) {
Colin Crossf45fa6b2012-03-26 12:38:26 -0700460 continue;
461 }
Jeff Brownbf7f4922012-06-07 16:40:01 -0700462 data[len] = '\0';
Colin Crossf45fa6b2012-03-26 12:38:26 -0700463
Jeff Brownbf7f4922012-06-07 16:40:01 -0700464 if (!strcmp(data, "/system/bin/app_process")) {
465 /* skip zygote -- it won't dump its stack anyway */
466 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
467 int fd = open(path, O_RDONLY);
468 len = read(fd, data, sizeof(data) - 1);
469 close(fd);
470 if (len <= 0) {
471 continue;
472 }
473 data[len] = '\0';
474 if (!strcmp(data, "zygote")) {
475 continue;
476 }
477
478 ++dalvik_found;
479 if (kill(pid, SIGQUIT)) {
480 fprintf(stderr, "kill(%d, SIGQUIT): %s\n", pid, strerror(errno));
481 continue;
482 }
483
484 /* wait for the writable-close notification from inotify */
485 struct pollfd pfd = { ifd, POLLIN, 0 };
486 int ret = poll(&pfd, 1, 200); /* 200 msec timeout */
487 if (ret < 0) {
488 fprintf(stderr, "poll: %s\n", strerror(errno));
489 } else if (ret == 0) {
490 fprintf(stderr, "warning: timed out dumping pid %d\n", pid);
491 } else {
492 struct inotify_event ie;
493 read(ifd, &ie, sizeof(ie));
494 }
495 } else if (should_dump_native_traces(data)) {
496 /* dump native process if appropriate */
497 if (lseek(fd, 0, SEEK_END) < 0) {
498 fprintf(stderr, "lseek: %s\n", strerror(errno));
499 } else {
500 dump_backtrace_to_file(pid, fd);
501 }
Colin Crossf45fa6b2012-03-26 12:38:26 -0700502 }
503 }
504
Colin Crossf45fa6b2012-03-26 12:38:26 -0700505 if (dalvik_found == 0) {
506 fprintf(stderr, "Warning: no Dalvik processes found to dump stacks\n");
507 }
508
509 static char dump_traces_path[PATH_MAX];
510 strlcpy(dump_traces_path, traces_path, sizeof(dump_traces_path));
511 strlcat(dump_traces_path, ".bugreport", sizeof(dump_traces_path));
512 if (rename(traces_path, dump_traces_path)) {
513 fprintf(stderr, "rename(%s, %s): %s\n", traces_path, dump_traces_path, strerror(errno));
Jeff Brownbf7f4922012-06-07 16:40:01 -0700514 goto error_close_ifd;
Colin Crossf45fa6b2012-03-26 12:38:26 -0700515 }
Jeff Brownbf7f4922012-06-07 16:40:01 -0700516 result = dump_traces_path;
Colin Crossf45fa6b2012-03-26 12:38:26 -0700517
518 /* replace the saved [ANR] traces.txt file */
519 rename(anr_traces_path, traces_path);
Jeff Brownbf7f4922012-06-07 16:40:01 -0700520
521error_close_ifd:
522 close(ifd);
523error_close_fd:
524 close(fd);
525 return result;
Colin Crossf45fa6b2012-03-26 12:38:26 -0700526}
527
528void play_sound(const char* path) {
529 run_command(NULL, 5, "/system/bin/stagefright", "-o", "-a", path, NULL);
530}