diff options
| -rw-r--r-- | debuggerd/debuggerd.c | 200 |
1 files changed, 95 insertions, 105 deletions
diff --git a/debuggerd/debuggerd.c b/debuggerd/debuggerd.c index 9394e1ca..996e6c20 100644 --- a/debuggerd/debuggerd.c +++ b/debuggerd/debuggerd.c @@ -2,16 +2,16 @@ ** ** 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 +** 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 +** 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 +** 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. */ @@ -48,8 +48,6 @@ extern int unwind_backtrace_with_ptrace(int tfd, pid_t pid, mapinfo *map, int *frame0_pc_sane, bool at_fault); -static char **process_name_ptr; - static int logsocket = -1; #define ANDROID_LOG_INFO 4 @@ -58,7 +56,7 @@ static int logsocket = -1; void _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...) { char buf[128]; - + va_list ap; va_start(ap, fmt); @@ -91,16 +89,16 @@ mapinfo *parse_maps_line(char *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_exidx_info if the mapped section starts with + /* To be filled in parse_exidx_info if the mapped section starts with * elf_header */ mi->exidx_start = mi->exidx_end = 0; @@ -120,7 +118,7 @@ void dump_build_info(int tfd) } -void dump_stack_and_code(int tfd, int pid, mapinfo *map, +void dump_stack_and_code(int tfd, int pid, mapinfo *map, int unwind_depth, unsigned int sp_list[], int frame0_pc_sane, bool at_fault) { @@ -128,6 +126,7 @@ void dump_stack_and_code(int tfd, int pid, mapinfo *map, 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; @@ -140,26 +139,53 @@ void dump_stack_and_code(int tfd, int pid, mapinfo *map, pc = r.ARM_lr; } - _LOG(tfd, true, "code%s:\n", frame0_pc_sane ? "" : " (around frame #01)"); + _LOG(tfd, only_in_tombstone, + "\ncode around %s:\n", frame0_pc_sane ? "pc" : "lr"); end = p = pc & ~3; p -= 16; + end += 16; - /* Dump the code as: - * PC contents + /* Dump the code around PC as: + * addr contents * 00008d34 fffffcd0 4c0eb530 b0934a0e 1c05447c * 00008d44 f7ff18a0 490ced94 68035860 d0012b00 */ while (p <= end) { int i; - _LOG(tfd, true, " %08x ", p); + sprintf(code_buffer, "%08x ", p); for (i = 0; i < 4; i++) { data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL); - _LOG(tfd, true, " %08x", data); + sprintf(code_buffer + strlen(code_buffer), "%08x ", data); p += 4; } - _LOG(tfd, true, "\n", p); + _LOG(tfd, only_in_tombstone, "%s\n", code_buffer); + } + + if (frame0_pc_sane) { + _LOG(tfd, only_in_tombstone, "\ncode around lr:\n"); + + end = p = r.ARM_lr & ~3; + p -= 16; + end += 16; + + /* 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; @@ -177,7 +203,7 @@ void dump_stack_and_code(int tfd, int pid, mapinfo *map, end += 0xff; } - _LOG(tfd, only_in_tombstone, "stack:\n"); + _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. @@ -190,7 +216,7 @@ void dump_stack_and_code(int tfd, int pid, mapinfo *map, } while (p <= end) { - char *prompt; + char *prompt; char level[16]; data = ptrace(PTRACE_PEEKTEXT, pid, (void*)p, NULL); if (p == sp_list[sp_depth]) { @@ -200,12 +226,12 @@ void dump_stack_and_code(int tfd, int pid, mapinfo *map, 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, + _LOG(tfd, (sp_depth > 2) || only_in_tombstone, + "%s %08x %08x %s\n", prompt, p, data, map_to_name(map, data, "")); p += 4; } @@ -214,14 +240,14 @@ void dump_stack_and_code(int tfd, int pid, mapinfo *map, 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, + _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, +void dump_pc_and_lr(int tfd, int pid, mapinfo *map, int unwound_level, bool at_fault) { struct pt_regs r; @@ -239,26 +265,26 @@ void dump_pc_and_lr(int tfd, int pid, mapinfo *map, int unwound_level, map_to_name(map, r.ARM_lr, "<unknown>")); } -void dump_registers(int tfd, int pid, bool at_fault) +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, + _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, + _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); + r.ARM_ip, r.ARM_sp, r.ARM_lr, r.ARM_pc, r.ARM_cpsr); } const char *get_signame(int sig) @@ -277,7 +303,7 @@ const char *get_signame(int sig) 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)); @@ -292,20 +318,20 @@ 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); } @@ -316,10 +342,10 @@ static void parse_exidx_info(mapinfo *milist, pid_t pid) Elf32_Ehdr ehdr; memset(&ehdr, 0, sizeof(Elf32_Ehdr)); - /* Read in sizeof(Elf32_Ehdr) worth of data from the beginning of + /* Read in sizeof(Elf32_Ehdr) worth of data from the beginning of * mapped section. */ - get_remote_struct(pid, (void *) (mi->start), &ehdr, + get_remote_struct(pid, (void *) (mi->start), &ehdr, sizeof(Elf32_Ehdr)); /* Check if it has the matching magic words */ if (IS_ELF(ehdr)) { @@ -330,7 +356,7 @@ static void parse_exidx_info(mapinfo *milist, pid_t pid) ptr = (Elf32_Phdr *) (mi->start + ehdr.e_phoff); for (i = 0; i < ehdr.e_phnum; i++) { /* Parse the program header */ - get_remote_struct(pid, (void *) ptr+i, &phdr, + get_remote_struct(pid, (char *) ptr+i, &phdr, sizeof(Elf32_Phdr)); /* Found a EXIDX segment? */ if (phdr.p_type == PT_ARM_EXIDX) { @@ -351,7 +377,7 @@ void dump_crash_report(int tfd, unsigned pid, unsigned tid, bool at_fault) unsigned int sp_list[STACK_CONTENT_DEPTH]; int stack_depth; int frame0_pc_sane = 1; - + if (!at_fault) { _LOG(tfd, true, "--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n"); @@ -359,7 +385,7 @@ void dump_crash_report(int tfd, unsigned pid, unsigned tid, bool at_fault) } dump_registers(tfd, tid, at_fault); - + /* Clear stack pointer records */ memset(sp_list, 0, sizeof(sp_list)); @@ -401,40 +427,6 @@ void dump_crash_report(int tfd, unsigned pid, unsigned tid, bool at_fault) } } -/* FIXME: unused: use it or lose it*/ -#if 0 -static -void start_gdbserver_vs(int pid, int port) -{ - pid_t p; - char *args[5]; - char commspec[16]; - char pidspec[16]; - - p = fork(); - if(p < 0) { - LOG("could not fork()\n"); - return; - } - - if(p == 0) { - sprintf(commspec, ":%d", port); - sprintf(pidspec, "%d", pid); - args[0] = "/system/bin/gdbserver"; - args[1] = commspec; - args[2] = "--attach"; - args[3] = pidspec; - args[4] = 0; - exit(execv(args[0], args)); - } else { - LOG("gdbserver pid=%d port=%d targetpid=%d\n", - p, port, pid); - - sleep(5); - } -} -#endif - #define MAX_TOMBSTONES 10 #define typecheck(x,y) { \ @@ -514,7 +506,7 @@ static bool dump_sibling_thread_report(int tfd, unsigned pid, unsigned tid) while ((de = readdir(d)) != NULL) { unsigned new_tid; /* Ignore "." and ".." */ - if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) + 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 */ @@ -533,7 +525,7 @@ static bool dump_sibling_thread_report(int tfd, unsigned pid, unsigned tid) } /* Return true if some thread is not detached cleanly */ -static bool engrave_tombstone(unsigned pid, unsigned tid, int debug_uid, +static bool engrave_tombstone(unsigned pid, unsigned tid, int debug_uid, int signal) { int fd; @@ -548,7 +540,7 @@ static bool engrave_tombstone(unsigned pid, unsigned tid, int debug_uid, 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. */ @@ -619,7 +611,7 @@ static void wait_for_user_action(unsigned tid, struct ucred* cr) "* adb shell gdbserver :port --attach %d & \n" "* \n" "* and press the HOME key. \n" - "********************************************************\n", + "********************************************************\n", cr->pid, cr->pid); /* wait for HOME key */ @@ -653,13 +645,13 @@ static void wait_for_user_action(unsigned tid, struct ucred* cr) disable_debug_led(); } } - } while (!home); + } while (!home); uninit_getevent(); } /* don't forget to turn debug led off */ disable_debug_led(); - + /* close filedescriptor */ LOG("debuggerd resuming process %d", cr->pid); } @@ -670,7 +662,7 @@ static void handle_crashing_process(int fd) struct stat s; unsigned tid; struct ucred cr; - int n, len, status; + int n, len, status; int tid_attach_status = -1; unsigned retry = 30; bool need_cleanup = false; @@ -678,9 +670,9 @@ static void handle_crashing_process(int fd) 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) { @@ -688,7 +680,7 @@ static void handle_crashing_process(int fd) goto done; } - XLOG("reading tid\n"); + XLOG("reading tid\n"); fcntl(fd, F_SETFL, O_NONBLOCK); while((n = read(fd, &tid, sizeof(unsigned))) != sizeof(unsigned)) { if(errno == EINTR) continue; @@ -711,7 +703,7 @@ static void handle_crashing_process(int fd) 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); @@ -725,7 +717,7 @@ static void handle_crashing_process(int fd) for(;;) { n = waitpid(tid, &status, __WALL); - + if(n < 0) { if(errno == EAGAIN) continue; LOG("waitpid failed: %s\n", strerror(errno)); @@ -745,7 +737,7 @@ static void handle_crashing_process(int fd) goto done; } continue; - + case SIGILL: case SIGABRT: case SIGBUS: @@ -767,17 +759,17 @@ static void handle_crashing_process(int fd) 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 + /* + * 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 */ @@ -807,14 +799,12 @@ done: if(fd != -1) close(fd); } -int main(int argc, char **argv) +int main() { int s; struct sigaction act; - - process_name_ptr = argv; - - logsocket = socket_local_client("logd", + + logsocket = socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_DGRAM); if(logsocket < 0) { logsocket = -1; @@ -827,23 +817,23 @@ int main(int argc, char **argv) sigaddset(&act.sa_mask,SIGCHLD); act.sa_flags = SA_NOCLDWAIT; sigaction(SIGCHLD, &act, 0); - - s = socket_local_server("android:debuggerd", + + 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); |