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platform_system_core/debuggerd/tombstone.c
Christopher Ferris a74ead0fd6 resolved conflicts for merge of 72f204de to master 
Change-Id: I7345014d00c669aea5e27ea50b2ac658145b068b
2014-01-08 16:20:50 -08:00

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/*
* Copyright (C) 2012-2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stddef.h>
#include <stdbool.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <time.h>
#include <sys/ptrace.h>
#include <sys/stat.h>
#include <private/android_filesystem_config.h>
#include <log/log.h>
#include <log/logger.h>
#include <cutils/properties.h>
#include <backtrace/backtrace.h>
#include <sys/socket.h>
#include <linux/un.h>
#include <selinux/android.h>
#include "machine.h"
#include "tombstone.h"
#include "backtrace.h"
#define STACK_WORDS 16
#define MAX_TOMBSTONES 10
#define TOMBSTONE_DIR "/data/tombstones"
/* Must match the path defined in NativeCrashListener.java */
#define NCRASH_SOCKET_PATH "/data/system/ndebugsocket"
#define typecheck(x,y) { \
typeof(x) __dummy1; \
typeof(y) __dummy2; \
(void)(&__dummy1 == &__dummy2); }
static bool signal_has_address(int sig) {
switch (sig) {
case SIGILL:
case SIGFPE:
case SIGSEGV:
case SIGBUS:
return true;
default:
return false;
}
}
static const char *get_signame(int sig)
{
switch(sig) {
case SIGILL: return "SIGILL";
case SIGABRT: return "SIGABRT";
case SIGBUS: return "SIGBUS";
case SIGFPE: return "SIGFPE";
case SIGSEGV: return "SIGSEGV";
case SIGPIPE: return "SIGPIPE";
#ifdef SIGSTKFLT
case SIGSTKFLT: return "SIGSTKFLT";
#endif
case SIGSTOP: return "SIGSTOP";
default: return "?";
}
}
static const char *get_sigcode(int signo, int code)
{
// Try the signal-specific codes...
switch (signo) {
case SIGILL:
switch (code) {
case ILL_ILLOPC: return "ILL_ILLOPC";
case ILL_ILLOPN: return "ILL_ILLOPN";
case ILL_ILLADR: return "ILL_ILLADR";
case ILL_ILLTRP: return "ILL_ILLTRP";
case ILL_PRVOPC: return "ILL_PRVOPC";
case ILL_PRVREG: return "ILL_PRVREG";
case ILL_COPROC: return "ILL_COPROC";
case ILL_BADSTK: return "ILL_BADSTK";
}
break;
case SIGBUS:
switch (code) {
case BUS_ADRALN: return "BUS_ADRALN";
case BUS_ADRERR: return "BUS_ADRERR";
case BUS_OBJERR: return "BUS_OBJERR";
}
break;
case SIGFPE:
switch (code) {
case FPE_INTDIV: return "FPE_INTDIV";
case FPE_INTOVF: return "FPE_INTOVF";
case FPE_FLTDIV: return "FPE_FLTDIV";
case FPE_FLTOVF: return "FPE_FLTOVF";
case FPE_FLTUND: return "FPE_FLTUND";
case FPE_FLTRES: return "FPE_FLTRES";
case FPE_FLTINV: return "FPE_FLTINV";
case FPE_FLTSUB: return "FPE_FLTSUB";
}
break;
case SIGSEGV:
switch (code) {
case SEGV_MAPERR: return "SEGV_MAPERR";
case SEGV_ACCERR: return "SEGV_ACCERR";
}
break;
case SIGTRAP:
switch (code) {
case TRAP_BRKPT: return "TRAP_BRKPT";
case TRAP_TRACE: return "TRAP_TRACE";
}
break;
}
// Then the other codes...
switch (code) {
case SI_USER: return "SI_USER";
#if defined(SI_KERNEL)
case SI_KERNEL: return "SI_KERNEL";
#endif
case SI_QUEUE: return "SI_QUEUE";
case SI_TIMER: return "SI_TIMER";
case SI_MESGQ: return "SI_MESGQ";
case SI_ASYNCIO: return "SI_ASYNCIO";
#if defined(SI_SIGIO)
case SI_SIGIO: return "SI_SIGIO";
#endif
#if defined(SI_TKILL)
case SI_TKILL: return "SI_TKILL";
#endif
}
// Then give up...
return "?";
}
static void dump_revision_info(log_t* log)
{
char revision[PROPERTY_VALUE_MAX];
property_get("ro.revision", revision, "unknown");
_LOG(log, SCOPE_AT_FAULT, "Revision: '%s'\n", revision);
}
static void dump_build_info(log_t* log)
{
char fingerprint[PROPERTY_VALUE_MAX];
property_get("ro.build.fingerprint", fingerprint, "unknown");
_LOG(log, SCOPE_AT_FAULT, "Build fingerprint: '%s'\n", fingerprint);
}
static void dump_fault_addr(log_t* log, pid_t tid, int sig)
{
siginfo_t si;
memset(&si, 0, sizeof(si));
if(ptrace(PTRACE_GETSIGINFO, tid, 0, &si)){
_LOG(log, SCOPE_AT_FAULT, "cannot get siginfo: %s\n", strerror(errno));
} else if (signal_has_address(sig)) {
_LOG(log, SCOPE_AT_FAULT, "signal %d (%s), code %d (%s), fault addr %08x\n",
sig, get_signame(sig),
si.si_code, get_sigcode(sig, si.si_code),
(uintptr_t) si.si_addr);
} else {
_LOG(log, SCOPE_AT_FAULT, "signal %d (%s), code %d (%s), fault addr --------\n",
sig, get_signame(sig), si.si_code, get_sigcode(sig, si.si_code));
}
}
static void dump_thread_info(log_t* log, pid_t pid, pid_t tid, int scope_flags) {
char path[64];
char threadnamebuf[1024];
char* threadname = NULL;
FILE *fp;
snprintf(path, sizeof(path), "/proc/%d/comm", tid);
if ((fp = fopen(path, "r"))) {
threadname = fgets(threadnamebuf, sizeof(threadnamebuf), fp);
fclose(fp);
if (threadname) {
size_t len = strlen(threadname);
if (len && threadname[len - 1] == '\n') {
threadname[len - 1] = '\0';
}
}
}
if (IS_AT_FAULT(scope_flags)) {
char procnamebuf[1024];
char* procname = NULL;
snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
if ((fp = fopen(path, "r"))) {
procname = fgets(procnamebuf, sizeof(procnamebuf), fp);
fclose(fp);
}
_LOG(log, SCOPE_AT_FAULT, "pid: %d, tid: %d, name: %s >>> %s <<<\n", pid, tid,
threadname ? threadname : "UNKNOWN",
procname ? procname : "UNKNOWN");
} else {
_LOG(log, 0, "pid: %d, tid: %d, name: %s\n",
pid, tid, threadname ? threadname : "UNKNOWN");
}
}
static void dump_stack_segment(const backtrace_context_t* context, log_t* log,
int scope_flags, uintptr_t *sp, size_t words, int label) {
for (size_t i = 0; i < words; i++) {
uint32_t stack_content;
if (!backtrace_read_word(context, *sp, &stack_content)) {
break;
}
const char* map_name = backtrace_get_map_name(context, stack_content, NULL);
if (!map_name) {
map_name = "";
}
uintptr_t offset = 0;
char* func_name = backtrace_get_func_name(context, stack_content, &offset);
if (func_name) {
if (!i && label >= 0) {
if (offset) {
_LOG(log, scope_flags, " #%02d %08x %08x %s (%s+%u)\n",
label, *sp, stack_content, map_name, func_name, offset);
} else {
_LOG(log, scope_flags, " #%02d %08x %08x %s (%s)\n",
label, *sp, stack_content, map_name, func_name);
}
} else {
if (offset) {
_LOG(log, scope_flags, " %08x %08x %s (%s+%u)\n",
*sp, stack_content, map_name, func_name, offset);
} else {
_LOG(log, scope_flags, " %08x %08x %s (%s)\n",
*sp, stack_content, map_name, func_name);
}
}
free(func_name);
} else {
if (!i && label >= 0) {
_LOG(log, scope_flags, " #%02d %08x %08x %s\n",
label, *sp, stack_content, map_name);
} else {
_LOG(log, scope_flags, " %08x %08x %s\n",
*sp, stack_content, map_name);
}
}
*sp += sizeof(uint32_t);
}
}
static void dump_stack(const backtrace_context_t* context, log_t* log, int scope_flags) {
const backtrace_t* backtrace = context->backtrace;
size_t first = 0, last;
for (size_t i = 0; i < backtrace->num_frames; i++) {
if (backtrace->frames[i].sp) {
if (!first) {
first = i+1;
}
last = i;
}
}
if (!first) {
return;
}
first--;
scope_flags |= SCOPE_SENSITIVE;
// Dump a few words before the first frame.
uintptr_t sp = backtrace->frames[first].sp - STACK_WORDS * sizeof(uint32_t);
dump_stack_segment(context, log, scope_flags, &sp, STACK_WORDS, -1);
// Dump a few words from all successive frames.
// Only log the first 3 frames, put the rest in the tombstone.
for (size_t i = first; i <= last; i++) {
const backtrace_frame_data_t* frame = &backtrace->frames[i];
if (sp != frame->sp) {
_LOG(log, scope_flags, " ........ ........\n");
sp = frame->sp;
}
if (i - first == 3) {
scope_flags &= (~SCOPE_AT_FAULT);
}
if (i == last) {
dump_stack_segment(context, log, scope_flags, &sp, STACK_WORDS, i);
if (sp < frame->sp + frame->stack_size) {
_LOG(log, scope_flags, " ........ ........\n");
}
} else {
size_t words = frame->stack_size / sizeof(uint32_t);
if (words == 0) {
words = 1;
} else if (words > STACK_WORDS) {
words = STACK_WORDS;
}
dump_stack_segment(context, log, scope_flags, &sp, words, i);
}
}
}
static void dump_backtrace_and_stack(const backtrace_context_t* context,
log_t* log, int scope_flags) {
if (context->backtrace->num_frames) {
_LOG(log, scope_flags, "\nbacktrace:\n");
dump_backtrace_to_log(context, log, scope_flags, " ");
_LOG(log, scope_flags, "\nstack:\n");
dump_stack(context, log, scope_flags);
}
}
static void dump_map(log_t* log, const backtrace_map_info_t* m, const char* what, int scope_flags) {
if (m != NULL) {
_LOG(log, scope_flags, " %08x-%08x %c%c%c %s\n", m->start, m->end,
m->is_readable ? 'r' : '-',
m->is_writable ? 'w' : '-',
m->is_executable ? 'x' : '-',
m->name);
} else {
_LOG(log, scope_flags, " (no %s)\n", what);
}
}
static void dump_nearby_maps(const backtrace_map_info_t* map_info_list, log_t* log, pid_t tid, int scope_flags) {
scope_flags |= SCOPE_SENSITIVE;
siginfo_t si;
memset(&si, 0, sizeof(si));
if (ptrace(PTRACE_GETSIGINFO, tid, 0, &si)) {
_LOG(log, scope_flags, "cannot get siginfo for %d: %s\n",
tid, strerror(errno));
return;
}
if (!signal_has_address(si.si_signo)) {
return;
}
uintptr_t addr = (uintptr_t) si.si_addr;
addr &= ~0xfff; /* round to 4K page boundary */
if (addr == 0) { /* null-pointer deref */
return;
}
_LOG(log, scope_flags, "\nmemory map around fault addr %08x:\n", (int)si.si_addr);
/*
* Search for a match, or for a hole where the match would be. The list
* is backward from the file content, so it starts at high addresses.
*/
const backtrace_map_info_t* map = map_info_list;
const backtrace_map_info_t* next = NULL;
const backtrace_map_info_t* prev = NULL;
while (map != NULL) {
if (addr >= map->start && addr < map->end) {
next = map->next;
break;
} else if (addr >= map->end) {
/* map would be between "prev" and this entry */
next = map;
map = NULL;
break;
}
prev = map;
map = map->next;
}
/*
* Show "next" then "match" then "prev" so that the addresses appear in
* ascending order (like /proc/pid/maps).
*/
dump_map(log, next, "map below", scope_flags);
dump_map(log, map, "map for address", scope_flags);
dump_map(log, prev, "map above", scope_flags);
}
static void dump_thread(const backtrace_context_t* context, log_t* log,
int scope_flags, int* total_sleep_time_usec) {
const backtrace_t* backtrace = context->backtrace;
wait_for_stop(backtrace->tid, total_sleep_time_usec);
dump_registers(log, backtrace->tid, scope_flags);
dump_backtrace_and_stack(context, log, scope_flags);
if (IS_AT_FAULT(scope_flags)) {
dump_memory_and_code(log, backtrace->tid, scope_flags);
dump_nearby_maps(backtrace->map_info_list, log, backtrace->tid, scope_flags);
}
}
/* Return true if some thread is not detached cleanly */
static bool dump_sibling_thread_report(
log_t* log, pid_t pid, pid_t tid, int* total_sleep_time_usec, backtrace_map_info_t* map_info) {
char task_path[64];
snprintf(task_path, sizeof(task_path), "/proc/%d/task", pid);
DIR* d = opendir(task_path);
/* Bail early if the task directory cannot be opened */
if (d == NULL) {
XLOG("Cannot open /proc/%d/task\n", pid);
return false;
}
bool detach_failed = false;
struct dirent* de;
while ((de = readdir(d)) != NULL) {
/* Ignore "." and ".." */
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) {
continue;
}
/* The main thread at fault has been handled individually */
char* end;
pid_t new_tid = strtoul(de->d_name, &end, 10);
if (*end || new_tid == tid) {
continue;
}
/* Skip this thread if cannot ptrace it */
if (ptrace(PTRACE_ATTACH, new_tid, 0, 0) < 0) {
continue;
}
_LOG(log, 0, "--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n");
dump_thread_info(log, pid, new_tid, 0);
backtrace_context_t new_context;
if (backtrace_create_context_with_map(&new_context, pid, new_tid, 0, map_info)) {
dump_thread(&new_context, log, 0, total_sleep_time_usec);
backtrace_destroy_context(&new_context);
}
if (ptrace(PTRACE_DETACH, new_tid, 0, 0) != 0) {
LOG("ptrace detach from %d failed: %s\n", new_tid, strerror(errno));
detach_failed = true;
}
}
closedir(d);
return detach_failed;
}
/*
* Reads the contents of the specified log device, filters out the entries
* that don't match the specified pid, and writes them to the tombstone file.
*
* If "tail" is set, we only print the last few lines.
*/
static void dump_log_file(log_t* log, pid_t pid, const char* filename,
unsigned int tail)
{
bool first = true;
struct logger_list *logger_list;
logger_list = android_logger_list_open(
android_name_to_log_id(filename), O_RDONLY | O_NONBLOCK, tail, pid);
if (!logger_list) {
XLOG("Unable to open %s: %s\n", filename, strerror(errno));
return;
}
struct log_msg log_entry;
while (true) {
ssize_t actual = android_logger_list_read(logger_list, &log_entry);
struct logger_entry* entry;
if (actual < 0) {
if (actual == -EINTR) {
/* interrupted by signal, retry */
continue;
} else if (actual == -EAGAIN) {
/* non-blocking EOF; we're done */
break;
} else {
_LOG(log, 0, "Error while reading log: %s\n",
strerror(-actual));
break;
}
} else if (actual == 0) {
_LOG(log, 0, "Got zero bytes while reading log: %s\n",
strerror(errno));
break;
}
/*
* NOTE: if you XLOG something here, this will spin forever,
* because you will be writing as fast as you're reading. Any
* high-frequency debug diagnostics should just be written to
* the tombstone file.
*/
entry = &log_entry.entry_v1;
if (first) {
_LOG(log, 0, "--------- %slog %s\n",
tail ? "tail end of " : "", filename);
first = false;
}
/*
* Msg format is: <priority:1><tag:N>\0<message:N>\0
*
* We want to display it in the same format as "logcat -v threadtime"
* (although in this case the pid is redundant).
*
* TODO: scan for line breaks ('\n') and display each text line
* on a separate line, prefixed with the header, like logcat does.
*/
static const char* kPrioChars = "!.VDIWEFS";
unsigned hdr_size = log_entry.entry.hdr_size;
if (!hdr_size) {
hdr_size = sizeof(log_entry.entry_v1);
}
char* msg = (char *)log_entry.buf + hdr_size;
unsigned char prio = msg[0];
char* tag = msg + 1;
msg = tag + strlen(tag) + 1;
/* consume any trailing newlines */
char* eatnl = msg + strlen(msg) - 1;
while (eatnl >= msg && *eatnl == '\n') {
*eatnl-- = '\0';
}
char prioChar = (prio < strlen(kPrioChars) ? kPrioChars[prio] : '?');
char timeBuf[32];
time_t sec = (time_t) entry->sec;
struct tm tmBuf;
struct tm* ptm;
ptm = localtime_r(&sec, &tmBuf);
strftime(timeBuf, sizeof(timeBuf), "%m-%d %H:%M:%S", ptm);
_LOG(log, 0, "%s.%03d %5d %5d %c %-8s: %s\n",
timeBuf, entry->nsec / 1000000, entry->pid, entry->tid,
prioChar, tag, msg);
}
android_logger_list_free(logger_list);
}
/*
* Dumps the logs generated by the specified pid to the tombstone, from both
* "system" and "main" log devices. Ideally we'd interleave the output.
*/
static void dump_logs(log_t* log, pid_t pid, unsigned tail)
{
dump_log_file(log, pid, "system", tail);
dump_log_file(log, pid, "main", tail);
}
static void dump_abort_message(const backtrace_context_t* context, log_t* log, uintptr_t address) {
if (address == 0) {
return;
}
address += sizeof(size_t); // Skip the buffer length.
char msg[512];
memset(msg, 0, sizeof(msg));
char* p = &msg[0];
while (p < &msg[sizeof(msg)]) {
uint32_t data;
if (!backtrace_read_word(context, address, &data)) {
break;
}
address += sizeof(uint32_t);
if ((*p++ = (data >> 0) & 0xff) == 0) {
break;
}
if ((*p++ = (data >> 8) & 0xff) == 0) {
break;
}
if ((*p++ = (data >> 16) & 0xff) == 0) {
break;
}
if ((*p++ = (data >> 24) & 0xff) == 0) {
break;
}
}
msg[sizeof(msg) - 1] = '\0';
_LOG(log, SCOPE_AT_FAULT, "Abort message: '%s'\n", msg);
}
/*
* Dumps all information about the specified pid to the tombstone.
*/
static bool dump_crash(log_t* log, pid_t pid, pid_t tid, int signal, uintptr_t abort_msg_address,
bool dump_sibling_threads, int* total_sleep_time_usec)
{
/* don't copy log messages to tombstone unless this is a dev device */
char value[PROPERTY_VALUE_MAX];
property_get("ro.debuggable", value, "0");
bool want_logs = (value[0] == '1');
if (log->amfd >= 0) {
/*
* Activity Manager protocol: binary 32-bit network-byte-order ints for the
* pid and signal number, followed by the raw text of the dump, culminating
* in a zero byte that marks end-of-data.
*/
uint32_t datum = htonl(pid);
TEMP_FAILURE_RETRY( write(log->amfd, &datum, 4) );
datum = htonl(signal);
TEMP_FAILURE_RETRY( write(log->amfd, &datum, 4) );
}
_LOG(log, SCOPE_AT_FAULT,
"*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\n");
dump_build_info(log);
dump_revision_info(log);
dump_thread_info(log, pid, tid, SCOPE_AT_FAULT);
if (signal) {
dump_fault_addr(log, tid, signal);
}
backtrace_context_t context;
/* Gather the map info once for all this process' threads. */
backtrace_map_info_t* map_info = backtrace_create_map_info_list(pid);
if (backtrace_create_context_with_map(&context, pid, tid, 0, map_info)) {
dump_abort_message(&context, log, abort_msg_address);
dump_thread(&context, log, SCOPE_AT_FAULT, total_sleep_time_usec);
backtrace_destroy_context(&context);
}
if (want_logs) {
dump_logs(log, pid, 5);
}
bool detach_failed = false;
if (dump_sibling_threads) {
detach_failed = dump_sibling_thread_report(log, pid, tid, total_sleep_time_usec, map_info);
}
/* Destroy the previously created map info. */
backtrace_destroy_map_info_list(map_info);
if (want_logs) {
dump_logs(log, pid, 0);
}
/* send EOD to the Activity Manager, then wait for its ack to avoid racing ahead
* and killing the target out from under it */
if (log->amfd >= 0) {
uint8_t eodMarker = 0;
TEMP_FAILURE_RETRY( write(log->amfd, &eodMarker, 1) );
/* 3 sec timeout reading the ack; we're fine if that happens */
TEMP_FAILURE_RETRY( read(log->amfd, &eodMarker, 1) );
}
return detach_failed;
}
/*
* find_and_open_tombstone - find an available tombstone slot, if any, of the
* form tombstone_XX where XX is 00 to MAX_TOMBSTONES-1, inclusive. If no
* file is available, we reuse the least-recently-modified file.
*
* Returns the path of the tombstone file, allocated using malloc(). Caller must free() it.
*/
static char* find_and_open_tombstone(int* fd)
{
unsigned long mtime = ULONG_MAX;
struct stat sb;
/*
* XXX: Our stat.st_mtime isn't time_t. If it changes, as it probably ought
* to, our logic breaks. This check will generate a warning if that happens.
*/
typecheck(mtime, sb.st_mtime);
/*
* In a single wolf-like pass, find an available slot and, in case none
* exist, find and record the least-recently-modified file.
*/
char path[128];
int oldest = 0;
for (int i = 0; i < MAX_TOMBSTONES; i++) {
snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", i);
if (!stat(path, &sb)) {
if (sb.st_mtime < mtime) {
oldest = i;
mtime = sb.st_mtime;
}
continue;
}
if (errno != ENOENT)
continue;
*fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0600);
if (*fd < 0)
continue; /* raced ? */
fchown(*fd, AID_SYSTEM, AID_SYSTEM);
return strdup(path);
}
/* we didn't find an available file, so we clobber the oldest one */
snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", oldest);
*fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
if (*fd < 0) {
LOG("failed to open tombstone file '%s': %s\n", path, strerror(errno));
return NULL;
}
fchown(*fd, AID_SYSTEM, AID_SYSTEM);
return strdup(path);
}
static int activity_manager_connect() {
int amfd = socket(PF_UNIX, SOCK_STREAM, 0);
if (amfd >= 0) {
struct sockaddr_un address;
int err;
memset(&address, 0, sizeof(address));
address.sun_family = AF_UNIX;
strncpy(address.sun_path, NCRASH_SOCKET_PATH, sizeof(address.sun_path));
err = TEMP_FAILURE_RETRY( connect(amfd, (struct sockaddr*) &address, sizeof(address)) );
if (!err) {
struct timeval tv;
memset(&tv, 0, sizeof(tv));
tv.tv_sec = 1; // tight leash
err = setsockopt(amfd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
if (!err) {
tv.tv_sec = 3; // 3 seconds on handshake read
err = setsockopt(amfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
}
}
if (err) {
close(amfd);
amfd = -1;
}
}
return amfd;
}
char* engrave_tombstone(pid_t pid, pid_t tid, int signal, uintptr_t abort_msg_address,
bool dump_sibling_threads, bool quiet, bool* detach_failed,
int* total_sleep_time_usec) {
mkdir(TOMBSTONE_DIR, 0755);
chown(TOMBSTONE_DIR, AID_SYSTEM, AID_SYSTEM);
if (selinux_android_restorecon(TOMBSTONE_DIR) == -1) {
*detach_failed = false;
return NULL;
}
int fd;
char* path = find_and_open_tombstone(&fd);
if (!path) {
*detach_failed = false;
return NULL;
}
log_t log;
log.tfd = fd;
log.amfd = activity_manager_connect();
log.quiet = quiet;
*detach_failed = dump_crash(&log, pid, tid, signal, abort_msg_address, dump_sibling_threads,
total_sleep_time_usec);
close(log.amfd);
close(fd);
return path;
}
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