ACPR/android_system_core
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
android_system_core/debuggerd/debuggerd.c
Mike Dodd 7fdcc435b6 am 89118032: Merge "Fix bug in debuggerd so it can successfully find the exidx section in libraries. This should fix the bug where the exception stack wasn\'t being printed past the PC." into gingerbread 
Merge commit '891180320f0b08758d053a8562dfcd601ef846b0' into gingerbread-plus-aosp

* commit '891180320f0b08758d053a8562dfcd601ef846b0':
  Fix bug in debuggerd so it can successfully find the exidx section in
2010-07-16 16:47:37 -07:00

865 lines
23 KiB
C
Raw Blame History

/* system/debuggerd/debuggerd.c
**
** Copyright 2006, 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include <stdarg.h>
#include <fcntl.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/exec_elf.h>
#include <sys/stat.h>
#include <cutils/sockets.h>
#include <cutils/logd.h>
#include <cutils/sockets.h>
#include <cutils/properties.h>
#include <linux/input.h>
#include <private/android_filesystem_config.h>
#include "utility.h"
#ifdef WITH_VFP
#ifdef WITH_VFP_D32
#define NUM_VFP_REGS 32
#else
#define NUM_VFP_REGS 16
#endif
#endif
/* Main entry point to get the backtrace from the crashing process */
extern int unwind_backtrace_with_ptrace(int tfd, pid_t pid, mapinfo *map,
unsigned int sp_list[],
int *frame0_pc_sane,
bool at_fault);
static int logsocket = -1;
#define ANDROID_LOG_INFO 4
/* Log information onto the tombstone */
void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...)
{
char buf[512];
va_list ap;
va_start(ap, fmt);
if (tfd >= 0) {
int len;
vsnprintf(buf, sizeof(buf), fmt, ap);
len = strlen(buf);
if(tfd >= 0) write(tfd, buf, len);
}
if (!in_tombstone_only)
__android_log_vprint(ANDROID_LOG_INFO, "DEBUG", fmt, ap);
}
#define LOG(fmt...) _LOG(-1, 0, fmt)
#if 0
#define XLOG(fmt...) _LOG(-1, 0, fmt)
#else
#define XLOG(fmt...) do {} while(0)
#endif
// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so
// 012345678901234567890123456789012345678901234567890123456789
// 0 1 2 3 4 5
mapinfo *parse_maps_line(char *line)
{
mapinfo *mi;
int len = strlen(line);
if(len < 1) return 0;
line[--len] = 0;
if(len < 50) return 0;
if(line[20] != 'x') return 0;
mi = malloc(sizeof(mapinfo) + (len - 47));
if(mi == 0) return 0;
mi->start = strtoul(line, 0, 16);
mi->end = strtoul(line + 9, 0, 16);
/* To be filled in parse_elf_info if the mapped section starts with
* elf_header
*/
mi->exidx_start = mi->exidx_end = 0;
mi->symbols = 0;
mi->next = 0;
strcpy(mi->name, line + 49);
return mi;
}
void dump_build_info(int tfd)
{
char fingerprint[PROPERTY_VALUE_MAX];
property_get("ro.build.fingerprint", fingerprint, "unknown");
_LOG(tfd, false, "Build fingerprint: '%s'\n", fingerprint);
}
void dump_stack_and_code(int tfd, int pid, mapinfo *map,
int unwind_depth, unsigned int sp_list[],
bool at_fault)
{
unsigned int sp, pc, p, end, data;
struct pt_regs r;
int sp_depth;
bool only_in_tombstone = !at_fault;
char code_buffer[80];
if(ptrace(PTRACE_GETREGS, pid, 0, &r)) return;
sp = r.ARM_sp;
pc = r.ARM_pc;
_LOG(tfd, only_in_tombstone, "\ncode around pc:\n");
end = p = pc & ~3;
p -= 32;
end += 32;
/* Dump the code around PC as:
* addr contents
* 00008d34 fffffcd0 4c0eb530 b0934a0e 1c05447c
* 00008d44 f7ff18a0 490ced94 68035860 d0012b00
*/
while (p <= end) {
int i;
sprintf(code_buffer, "%08x ", p);
for (i = 0; i < 4; i++) {
data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL);
sprintf(code_buffer + strlen(code_buffer), "%08x ", data);
p += 4;
}
_LOG(tfd, only_in_tombstone, "%s\n", code_buffer);
}
if ((unsigned) r.ARM_lr != pc) {
_LOG(tfd, only_in_tombstone, "\ncode around lr:\n");
end = p = r.ARM_lr & ~3;
p -= 32;
end += 32;
/* Dump the code around LR as:
* addr contents
* 00008d34 fffffcd0 4c0eb530 b0934a0e 1c05447c
* 00008d44 f7ff18a0 490ced94 68035860 d0012b00
*/
while (p <= end) {
int i;
sprintf(code_buffer, "%08x ", p);
for (i = 0; i < 4; i++) {
data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL);
sprintf(code_buffer + strlen(code_buffer), "%08x ", data);
p += 4;
}
_LOG(tfd, only_in_tombstone, "%s\n", code_buffer);
}
}
p = sp - 64;
p &= ~3;
if (unwind_depth != 0) {
if (unwind_depth < STACK_CONTENT_DEPTH) {
end = sp_list[unwind_depth-1];
}
else {
end = sp_list[STACK_CONTENT_DEPTH-1];
}
}
else {
end = sp | 0x000000ff;
end += 0xff;
}
_LOG(tfd, only_in_tombstone, "\nstack:\n");
/* If the crash is due to PC == 0, there will be two frames that
* have identical SP value.
*/
if (sp_list[0] == sp_list[1]) {
sp_depth = 1;
}
else {
sp_depth = 0;
}
while (p <= end) {
char *prompt;
char level[16];
data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL);
if (p == sp_list[sp_depth]) {
sprintf(level, "#%02d", sp_depth++);
prompt = level;
}
else {
prompt = " ";
}
/* Print the stack content in the log for the first 3 frames. For the
* rest only print them in the tombstone file.
*/
_LOG(tfd, (sp_depth > 2) || only_in_tombstone,
"%s %08x %08x %s\n", prompt, p, data,
map_to_name(map, data, ""));
p += 4;
}
/* print another 64-byte of stack data after the last frame */
end = p+64;
while (p <= end) {
data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL);
_LOG(tfd, (sp_depth > 2) || only_in_tombstone,
" %08x %08x %s\n", p, data,
map_to_name(map, data, ""));
p += 4;
}
}
void dump_pc_and_lr(int tfd, int pid, mapinfo *map, int unwound_level,
bool at_fault)
{
struct pt_regs r;
if(ptrace(PTRACE_GETREGS, pid, 0, &r)) {
_LOG(tfd, !at_fault, "tid %d not responding!\n", pid);
return;
}
if (unwound_level == 0) {
_LOG(tfd, !at_fault, " #%02d pc %08x %s\n", 0, r.ARM_pc,
map_to_name(map, r.ARM_pc, "<unknown>"));
}
_LOG(tfd, !at_fault, " #%02d lr %08x %s\n", 1, r.ARM_lr,
map_to_name(map, r.ARM_lr, "<unknown>"));
}
void dump_registers(int tfd, int pid, bool at_fault)
{
struct pt_regs r;
bool only_in_tombstone = !at_fault;
if(ptrace(PTRACE_GETREGS, pid, 0, &r)) {
_LOG(tfd, only_in_tombstone,
"cannot get registers: %s\n", strerror(errno));
return;
}
_LOG(tfd, only_in_tombstone, " r0 %08x r1 %08x r2 %08x r3 %08x\n",
r.ARM_r0, r.ARM_r1, r.ARM_r2, r.ARM_r3);
_LOG(tfd, only_in_tombstone, " r4 %08x r5 %08x r6 %08x r7 %08x\n",
r.ARM_r4, r.ARM_r5, r.ARM_r6, r.ARM_r7);
_LOG(tfd, only_in_tombstone, " r8 %08x r9 %08x 10 %08x fp %08x\n",
r.ARM_r8, r.ARM_r9, r.ARM_r10, r.ARM_fp);
_LOG(tfd, only_in_tombstone,
" ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
r.ARM_ip, r.ARM_sp, r.ARM_lr, r.ARM_pc, r.ARM_cpsr);
#ifdef WITH_VFP
struct user_vfp vfp_regs;
int i;
if(ptrace(PTRACE_GETVFPREGS, pid, 0, &vfp_regs)) {
_LOG(tfd, only_in_tombstone,
"cannot get registers: %s\n", strerror(errno));
return;
}
for (i = 0; i < NUM_VFP_REGS; i += 2) {
_LOG(tfd, only_in_tombstone,
" d%-2d %016llx d%-2d %016llx\n",
i, vfp_regs.fpregs[i], i+1, vfp_regs.fpregs[i+1]);
}
_LOG(tfd, only_in_tombstone, " scr %08lx\n\n", vfp_regs.fpscr);
#endif
}
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 SIGSTKFLT: return "SIGSTKFLT";
default: return "?";
}
}
void dump_fault_addr(int tfd, int pid, int sig)
{
siginfo_t si;
memset(&si, 0, sizeof(si));
if(ptrace(PTRACE_GETSIGINFO, pid, 0, &si)){
_LOG(tfd, false, "cannot get siginfo: %s\n", strerror(errno));
} else {
_LOG(tfd, false, "signal %d (%s), fault addr %08x\n",
sig, get_signame(sig), si.si_addr);
}
}
void dump_crash_banner(int tfd, unsigned pid, unsigned tid, int sig)
{
char data[1024];
char *x = 0;
FILE *fp;
sprintf(data, "/proc/%d/cmdline", pid);
fp = fopen(data, "r");
if(fp) {
x = fgets(data, 1024, fp);
fclose(fp);
}
_LOG(tfd, false,
"*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\n");
dump_build_info(tfd);
_LOG(tfd, false, "pid: %d, tid: %d >>> %s <<<\n",
pid, tid, x ? x : "UNKNOWN");
if(sig) dump_fault_addr(tfd, tid, sig);
}
static void parse_elf_info(mapinfo *milist, pid_t pid)
{
mapinfo *mi;
for (mi = milist; mi != NULL; mi = mi->next) {
Elf32_Ehdr ehdr;
memset(&ehdr, 0, sizeof(Elf32_Ehdr));
/* Read in sizeof(Elf32_Ehdr) worth of data from the beginning of
* mapped section.
*/
get_remote_struct(pid, (void *) (mi->start), &ehdr,
sizeof(Elf32_Ehdr));
/* Check if it has the matching magic words */
if (IS_ELF(ehdr)) {
Elf32_Phdr phdr;
Elf32_Phdr *ptr;
int i;
ptr = (Elf32_Phdr *) (mi->start + ehdr.e_phoff);
for (i = 0; i < ehdr.e_phnum; i++) {
/* Parse the program header */
get_remote_struct(pid, (char *) (ptr+i), &phdr,
sizeof(Elf32_Phdr));
/* Found a EXIDX segment? */
if (phdr.p_type == PT_ARM_EXIDX) {
mi->exidx_start = mi->start + phdr.p_offset;
mi->exidx_end = mi->exidx_start + phdr.p_filesz;
break;
}
}
/* Try to load symbols from this file */
mi->symbols = symbol_table_create(mi->name);
}
}
}
void dump_crash_report(int tfd, unsigned pid, unsigned tid, bool at_fault)
{
char data[1024];
FILE *fp;
mapinfo *milist = 0;
unsigned int sp_list[STACK_CONTENT_DEPTH];
int stack_depth;
int frame0_pc_sane = 1;
if (!at_fault) {
_LOG(tfd, true,
"--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n");
_LOG(tfd, true, "pid: %d, tid: %d\n", pid, tid);
}
dump_registers(tfd, tid, at_fault);
/* Clear stack pointer records */
memset(sp_list, 0, sizeof(sp_list));
sprintf(data, "/proc/%d/maps", pid);
fp = fopen(data, "r");
if(fp) {
while(fgets(data, 1024, fp)) {
mapinfo *mi = parse_maps_line(data);
if(mi) {
mi->next = milist;
milist = mi;
}
}
fclose(fp);
}
parse_elf_info(milist, tid);
/* If stack unwinder fails, use the default solution to dump the stack
* content.
*/
stack_depth = unwind_backtrace_with_ptrace(tfd, tid, milist, sp_list,
&frame0_pc_sane, at_fault);
/* The stack unwinder should at least unwind two levels of stack. If less
* level is seen we make sure at lease pc and lr are dumped.
*/
if (stack_depth < 2) {
dump_pc_and_lr(tfd, tid, milist, stack_depth, at_fault);
}
dump_stack_and_code(tfd, tid, milist, stack_depth, sp_list, at_fault);
while(milist) {
mapinfo *next = milist->next;
symbol_table_free(milist->symbols);
free(milist);
milist = next;
}
}
#define MAX_TOMBSTONES 10
#define typecheck(x,y) { \
typeof(x) __dummy1; \
typeof(y) __dummy2; \
(void)(&__dummy1 == &__dummy2); }
#define TOMBSTONE_DIR "/data/tombstones"
/*
* 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.
*/
static int find_and_open_tombstone(void)
{
unsigned long mtime = ULONG_MAX;
struct stat sb;
char path[128];
int fd, i, oldest = 0;
/*
* 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.
*/
for (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 fd;
}
/* 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);
fchown(fd, AID_SYSTEM, AID_SYSTEM);
return fd;
}
/* Return true if some thread is not detached cleanly */
static bool dump_sibling_thread_report(int tfd, unsigned pid, unsigned tid)
{
char task_path[1024];
sprintf(task_path, "/proc/%d/task", pid);
DIR *d;
struct dirent *de;
int need_cleanup = 0;
d = opendir(task_path);
/* Bail early if cannot open the task directory */
if (d == NULL) {
XLOG("Cannot open /proc/%d/task\n", pid);
return false;
}
while ((de = readdir(d)) != NULL) {
unsigned new_tid;
/* Ignore "." and ".." */
if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
continue;
new_tid = atoi(de->d_name);
/* The main thread at fault has been handled individually */
if (new_tid == tid)
continue;
/* Skip this thread if cannot ptrace it */
if (ptrace(PTRACE_ATTACH, new_tid, 0, 0) < 0)
continue;
dump_crash_report(tfd, pid, new_tid, false);
need_cleanup |= ptrace(PTRACE_DETACH, new_tid, 0, 0);
}
closedir(d);
return need_cleanup != 0;
}
/* Return true if some thread is not detached cleanly */
static bool engrave_tombstone(unsigned pid, unsigned tid, int debug_uid,
int signal)
{
int fd;
bool need_cleanup = false;
mkdir(TOMBSTONE_DIR, 0755);
chown(TOMBSTONE_DIR, AID_SYSTEM, AID_SYSTEM);
fd = find_and_open_tombstone();
if (fd < 0)
return need_cleanup;
dump_crash_banner(fd, pid, tid, signal);
dump_crash_report(fd, pid, tid, true);
/*
* If the user has requested to attach gdb, don't collect the per-thread
* information as it increases the chance to lose track of the process.
*/
if ((signed)pid > debug_uid) {
need_cleanup = dump_sibling_thread_report(fd, pid, tid);
}
close(fd);
return need_cleanup;
}
static int
write_string(const char* file, const char* string)
{
int len;
int fd;
ssize_t amt;
fd = open(file, O_RDWR);
len = strlen(string);
if (fd < 0)
return -errno;
amt = write(fd, string, len);
close(fd);
return amt >= 0 ? 0 : -errno;
}
static
void init_debug_led(void)
{
// trout leds
write_string("/sys/class/leds/red/brightness", "0");
write_string("/sys/class/leds/green/brightness", "0");
write_string("/sys/class/leds/blue/brightness", "0");
write_string("/sys/class/leds/red/device/blink", "0");
// sardine leds
write_string("/sys/class/leds/left/cadence", "0,0");
}
static
void enable_debug_led(void)
{
// trout leds
write_string("/sys/class/leds/red/brightness", "255");
// sardine leds
write_string("/sys/class/leds/left/cadence", "1,0");
}
static
void disable_debug_led(void)
{
// trout leds
write_string("/sys/class/leds/red/brightness", "0");
// sardine leds
write_string("/sys/class/leds/left/cadence", "0,0");
}
extern int init_getevent();
extern void uninit_getevent();
extern int get_event(struct input_event* event, int timeout);
static void wait_for_user_action(unsigned tid, struct ucred* cr)
{
(void)tid;
/* First log a helpful message */
LOG( "********************************************************\n"
"* Process %d has been suspended while crashing. To\n"
"* attach gdbserver for a gdb connection on port 5039:\n"
"*\n"
"* adb shell gdbserver :5039 --attach %d &\n"
"*\n"
"* Press HOME key to let the process continue crashing.\n"
"********************************************************\n",
cr->pid, cr->pid);
/* wait for HOME key (TODO: something useful for devices w/o HOME key) */
if (init_getevent() == 0) {
int ms = 1200 / 10;
int dit = 1;
int dah = 3*dit;
int _ = -dit;
int ___ = 3*_;
int _______ = 7*_;
const signed char codes[] = {
dit,_,dit,_,dit,___,dah,_,dah,_,dah,___,dit,_,dit,_,dit,_______
};
size_t s = 0;
struct input_event e;
int home = 0;
init_debug_led();
enable_debug_led();
do {
int timeout = abs((int)(codes[s])) * ms;
int res = get_event(&e, timeout);
if (res == 0) {
if (e.type==EV_KEY && e.code==KEY_HOME && e.value==0)
home = 1;
} else if (res == 1) {
if (++s >= sizeof(codes)/sizeof(*codes))
s = 0;
if (codes[s] > 0) {
enable_debug_led();
} else {
disable_debug_led();
}
}
} while (!home);
uninit_getevent();
}
/* don't forget to turn debug led off */
disable_debug_led();
/* close filedescriptor */
LOG("debuggerd resuming process %d", cr->pid);
}
static void handle_crashing_process(int fd)
{
char buf[64];
struct stat s;
unsigned tid;
struct ucred cr;
int n, len, status;
int tid_attach_status = -1;
unsigned retry = 30;
bool need_cleanup = false;
char value[PROPERTY_VALUE_MAX];
property_get("debug.db.uid", value, "-1");
int debug_uid = atoi(value);
XLOG("handle_crashing_process(%d)\n", fd);
len = sizeof(cr);
n = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &len);
if(n != 0) {
LOG("cannot get credentials\n");
goto done;
}
XLOG("reading tid\n");
fcntl(fd, F_SETFL, O_NONBLOCK);
while((n = read(fd, &tid, sizeof(unsigned))) != sizeof(unsigned)) {
if(errno == EINTR) continue;
if(errno == EWOULDBLOCK) {
if(retry-- > 0) {
usleep(100 * 1000);
continue;
}
LOG("timed out reading tid\n");
goto done;
}
LOG("read failure? %s\n", strerror(errno));
goto done;
}
sprintf(buf,"/proc/%d/task/%d", cr.pid, tid);
if(stat(buf, &s)) {
LOG("tid %d does not exist in pid %d. ignoring debug request\n",
tid, cr.pid);
close(fd);
return;
}
XLOG("BOOM: pid=%d uid=%d gid=%d tid=%d\n", cr.pid, cr.uid, cr.gid, tid);
tid_attach_status = ptrace(PTRACE_ATTACH, tid, 0, 0);
if(tid_attach_status < 0) {
LOG("ptrace attach failed: %s\n", strerror(errno));
goto done;
}
close(fd);
fd = -1;
for(;;) {
n = waitpid(tid, &status, __WALL);
if(n < 0) {
if(errno == EAGAIN) continue;
LOG("waitpid failed: %s\n", strerror(errno));
goto done;
}
XLOG("waitpid: n=%d status=%08x\n", n, status);
if(WIFSTOPPED(status)){
n = WSTOPSIG(status);
switch(n) {
case SIGSTOP:
XLOG("stopped -- continuing\n");
n = ptrace(PTRACE_CONT, tid, 0, 0);
if(n) {
LOG("ptrace failed: %s\n", strerror(errno));
goto done;
}
continue;
case SIGILL:
case SIGABRT:
case SIGBUS:
case SIGFPE:
case SIGSEGV:
case SIGSTKFLT: {
XLOG("stopped -- fatal signal\n");
need_cleanup = engrave_tombstone(cr.pid, tid, debug_uid, n);
kill(tid, SIGSTOP);
goto done;
}
default:
XLOG("stopped -- unexpected signal\n");
goto done;
}
} else {
XLOG("unexpected waitpid response\n");
goto done;
}
}
done:
XLOG("detaching\n");
/* stop the process so we can debug */
kill(cr.pid, SIGSTOP);
/*
* If a thread has been attached by ptrace, make sure it is detached
* successfully otherwise we will get a zombie.
*/
if (tid_attach_status == 0) {
int detach_status;
/* detach so we can attach gdbserver */
detach_status = ptrace(PTRACE_DETACH, tid, 0, 0);
need_cleanup |= (detach_status != 0);
}
/*
* if debug.db.uid is set, its value indicates if we should wait
* for user action for the crashing process.
* in this case, we log a message and turn the debug LED on
* waiting for a gdb connection (for instance)
*/
if ((signed)cr.uid <= debug_uid) {
wait_for_user_action(tid, &cr);
}
/* resume stopped process (so it can crash in peace) */
kill(cr.pid, SIGCONT);
if (need_cleanup) {
LOG("debuggerd committing suicide to free the zombie!\n");
kill(getpid(), SIGKILL);
}
if(fd != -1) close(fd);
}
int main()
{
int s;
struct sigaction act;
logsocket = socket_local_client("logd",
ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_DGRAM);
if(logsocket < 0) {
logsocket = -1;
} else {
fcntl(logsocket, F_SETFD, FD_CLOEXEC);
}
act.sa_handler = SIG_DFL;
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask,SIGCHLD);
act.sa_flags = SA_NOCLDWAIT;
sigaction(SIGCHLD, &act, 0);
s = socket_local_server("android:debuggerd",
ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
if(s < 0) return -1;
fcntl(s, F_SETFD, FD_CLOEXEC);
LOG("debuggerd: " __DATE__ " " __TIME__ "\n");
for(;;) {
struct sockaddr addr;
socklen_t alen;
int fd;
alen = sizeof(addr);
fd = accept(s, &addr, &alen);
if(fd < 0) continue;
fcntl(fd, F_SETFD, FD_CLOEXEC);
handle_crashing_process(fd);
}
return 0;
}
Reference in a new issue View git blame Copy permalink