debuggerd.c revision 02526d486803de153d03851f4d5f9be7c555e46c
1dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* system/debuggerd/debuggerd.c 2dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 3dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** Copyright 2006, The Android Open Source Project 4dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 509e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** Licensed under the Apache License, Version 2.0 (the "License"); 609e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** you may not use this file except in compliance with the License. 709e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** You may obtain a copy of the License at 8dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 909e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** http://www.apache.org/licenses/LICENSE-2.0 10dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** 1109e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** Unless required by applicable law or agreed to in writing, software 1209e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** distributed under the License is distributed on an "AS IS" BASIS, 1309e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1409e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng** See the License for the specific language governing permissions and 15dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project** limitations under the License. 16dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project*/ 17dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 18dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdio.h> 19dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <errno.h> 20dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <signal.h> 21dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <pthread.h> 22dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdarg.h> 23dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <fcntl.h> 24dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/types.h> 25dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <dirent.h> 26dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 27dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/ptrace.h> 28dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/wait.h> 29dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/exec_elf.h> 30dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/stat.h> 31dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 32dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <cutils/sockets.h> 33dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <cutils/logd.h> 34dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <cutils/properties.h> 35dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 36dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <linux/input.h> 37dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 38dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <private/android_filesystem_config.h> 39dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 40c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov#include <byteswap.h> 41849249064cae9c1bb23b0204b5d35b832567801eBruce Beare#include "debuggerd.h" 42dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "utility.h" 43dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 44dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define ANDROID_LOG_INFO 4 45dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 46dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* Log information onto the tombstone */ 47dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid _LOG(int tfd, bool in_tombstone_only, const char *fmt, ...) 48dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 49ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu char buf[512]; 5009e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 51dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project va_list ap; 52dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project va_start(ap, fmt); 53dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 54dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (tfd >= 0) { 55dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int len; 56dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project vsnprintf(buf, sizeof(buf), fmt, ap); 57dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len = strlen(buf); 58dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(tfd >= 0) write(tfd, buf, len); 59dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 60dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 61dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (!in_tombstone_only) 62dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __android_log_vprint(ANDROID_LOG_INFO, "DEBUG", fmt, ap); 63dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 64dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 65dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so 66dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project// 012345678901234567890123456789012345678901234567890123456789 67dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project// 0 1 2 3 4 5 68dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 69dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectmapinfo *parse_maps_line(char *line) 70dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 71dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mapinfo *mi; 72dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int len = strlen(line); 73dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 74dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(len < 1) return 0; 75dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project line[--len] = 0; 7609e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 77dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(len < 50) return 0; 78dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(line[20] != 'x') return 0; 79dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 80dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi = malloc(sizeof(mapinfo) + (len - 47)); 81dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(mi == 0) return 0; 8209e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 83dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi->start = strtoul(line, 0, 16); 84dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi->end = strtoul(line + 9, 0, 16); 85ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu /* To be filled in parse_elf_info if the mapped section starts with 86dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * elf_header 87dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 88dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi->exidx_start = mi->exidx_end = 0; 89ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu mi->symbols = 0; 90dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi->next = 0; 91dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project strcpy(mi->name, line + 49); 92dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 93dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return mi; 94dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 95dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 96dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid dump_build_info(int tfd) 97dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 98dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char fingerprint[PROPERTY_VALUE_MAX]; 99dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 100dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_get("ro.build.fingerprint", fingerprint, "unknown"); 101dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 102dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project _LOG(tfd, false, "Build fingerprint: '%s'\n", fingerprint); 103dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 104dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 105dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectconst char *get_signame(int sig) 106dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 107dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project switch(sig) { 108dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGILL: return "SIGILL"; 109dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGABRT: return "SIGABRT"; 110dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGBUS: return "SIGBUS"; 111dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGFPE: return "SIGFPE"; 112dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGSEGV: return "SIGSEGV"; 113dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGSTKFLT: return "SIGSTKFLT"; 114dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project default: return "?"; 115dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 116dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 117dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 11883c6b052918178033875e7ea54ca746cf7303f87Carl Shapiroconst char *get_sigcode(int signo, int code) 11983c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro{ 12083c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro switch (signo) { 12183c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case SIGILL: 12283c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro switch (code) { 12383c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_ILLOPC: return "ILL_ILLOPC"; 12483c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_ILLOPN: return "ILL_ILLOPN"; 12583c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_ILLADR: return "ILL_ILLADR"; 12683c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_ILLTRP: return "ILL_ILLTRP"; 12783c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_PRVOPC: return "ILL_PRVOPC"; 12883c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_PRVREG: return "ILL_PRVREG"; 12983c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_COPROC: return "ILL_COPROC"; 13083c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case ILL_BADSTK: return "ILL_BADSTK"; 13183c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro } 13283c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro break; 13383c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case SIGBUS: 13483c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro switch (code) { 13583c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case BUS_ADRALN: return "BUS_ADRALN"; 13683c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case BUS_ADRERR: return "BUS_ADRERR"; 13783c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case BUS_OBJERR: return "BUS_OBJERR"; 13883c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro } 13983c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro break; 14083c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case SIGFPE: 14183c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro switch (code) { 14283c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_INTDIV: return "FPE_INTDIV"; 14383c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_INTOVF: return "FPE_INTOVF"; 14483c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_FLTDIV: return "FPE_FLTDIV"; 14583c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_FLTOVF: return "FPE_FLTOVF"; 14683c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_FLTUND: return "FPE_FLTUND"; 14783c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_FLTRES: return "FPE_FLTRES"; 14883c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_FLTINV: return "FPE_FLTINV"; 14983c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case FPE_FLTSUB: return "FPE_FLTSUB"; 15083c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro } 15183c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro break; 15283c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case SIGSEGV: 15383c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro switch (code) { 15483c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case SEGV_MAPERR: return "SEGV_MAPERR"; 15583c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro case SEGV_ACCERR: return "SEGV_ACCERR"; 15683c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro } 15783c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro break; 15883c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro } 15983c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro return "?"; 16083c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro} 16183c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro 162dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid dump_fault_addr(int tfd, int pid, int sig) 163dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 164dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project siginfo_t si; 16509e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 166dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memset(&si, 0, sizeof(si)); 167dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(ptrace(PTRACE_GETSIGINFO, pid, 0, &si)){ 168dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project _LOG(tfd, false, "cannot get siginfo: %s\n", strerror(errno)); 169dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 17083c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro _LOG(tfd, false, "signal %d (%s), code %d (%s), fault addr %08x\n", 17183c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro sig, get_signame(sig), 17283c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro si.si_code, get_sigcode(sig, si.si_code), 17383c6b052918178033875e7ea54ca746cf7303f87Carl Shapiro si.si_addr); 174dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 175dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 176dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 177dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid dump_crash_banner(int tfd, unsigned pid, unsigned tid, int sig) 178dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 179dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char data[1024]; 180dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *x = 0; 181dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project FILE *fp; 18209e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 183dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sprintf(data, "/proc/%d/cmdline", pid); 184dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fp = fopen(data, "r"); 185dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(fp) { 186dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project x = fgets(data, 1024, fp); 187dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fclose(fp); 188dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 18909e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 190dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project _LOG(tfd, false, 191dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project "*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***\n"); 192dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dump_build_info(tfd); 193dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project _LOG(tfd, false, "pid: %d, tid: %d >>> %s <<<\n", 194dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pid, tid, x ? x : "UNKNOWN"); 19509e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 196dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(sig) dump_fault_addr(tfd, tid, sig); 197dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 198dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 199c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov/* After randomization (ASLR), stack contents that point to randomized 200c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov * code become uninterpretable (e.g. can't be resolved to line numbers). 201c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov * Here, we bundle enough information so that stack analysis on the 202c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov * server side can still be performed. This means we are leaking some 203c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov * information about the device (its randomization base). We have to make 204c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov * sure an attacker has no way of intercepting the tombstone. 205c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov */ 206c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 207c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinovtypedef struct { 208c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov int32_t mmap_addr; 209c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov char tag[4]; /* 'P', 'R', 'E', ' ' */ 210c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov} prelink_info_t __attribute__((packed)); 211c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 212c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinovstatic inline void set_prelink(long *prelink_addr, 213c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov prelink_info_t *info) 214c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov{ 215c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov // We will assume the binary is little-endian, and test the 216c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov // host endianness here. 217c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov unsigned long test_endianness = 0xFF; 218c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 219c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (sizeof(prelink_info_t) == 8 && prelink_addr) { 220c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (*(unsigned char *)&test_endianness) 221c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov *prelink_addr = info->mmap_addr; 222c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov else 223c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov *prelink_addr = bswap_32(info->mmap_addr); 224c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov } 225c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov} 226c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 227c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinovstatic int check_prelinked(const char *fname, 228c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov long *prelink_addr) 229c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov{ 230c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov *prelink_addr = 0; 231c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (sizeof(prelink_info_t) != 8) return 0; 232c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 233c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov int fd = open(fname, O_RDONLY); 234c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (fd < 0) return 0; 235c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov off_t end = lseek(fd, 0, SEEK_END); 236c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov int nr = sizeof(prelink_info_t); 237c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 238c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov off_t sz = lseek(fd, -nr, SEEK_CUR); 239c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if ((long)(end - sz) != (long)nr) return 0; 240c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (sz == (off_t)-1) return 0; 241c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 242c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov prelink_info_t info; 243c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov int num_read = read(fd, &info, nr); 244c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (num_read < 0) return 0; 245c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (num_read != sizeof(info)) return 0; 246c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 247c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov int prelinked = 0; 248c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (!strncmp(info.tag, "PRE ", 4)) { 249c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov set_prelink(prelink_addr, &info); 250c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov prelinked = 1; 251c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov } 252c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov if (close(fd) < 0) return 0; 253c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov return prelinked; 254c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov} 255c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 256c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinovvoid dump_randomization_base(int tfd, bool at_fault) { 257c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov bool only_in_tombstone = !at_fault; 258c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov long prelink_addr; 259c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov check_prelinked("/system/lib/libc.so", &prelink_addr); 260c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov _LOG(tfd, only_in_tombstone, 261c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov "\nlibc base address: %08x\n", prelink_addr); 262c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov} 263c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 264c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov/* End of ASLR-related logic. */ 265c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov 266ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hustatic void parse_elf_info(mapinfo *milist, pid_t pid) 267dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 268dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mapinfo *mi; 269dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (mi = milist; mi != NULL; mi = mi->next) { 270dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project Elf32_Ehdr ehdr; 271dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 272dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memset(&ehdr, 0, sizeof(Elf32_Ehdr)); 27309e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng /* Read in sizeof(Elf32_Ehdr) worth of data from the beginning of 274dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * mapped section. 275dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 27609e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng get_remote_struct(pid, (void *) (mi->start), &ehdr, 277dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sizeof(Elf32_Ehdr)); 278dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Check if it has the matching magic words */ 279dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (IS_ELF(ehdr)) { 280dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project Elf32_Phdr phdr; 281dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project Elf32_Phdr *ptr; 282dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int i; 283dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 284dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ptr = (Elf32_Phdr *) (mi->start + ehdr.e_phoff); 285dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 0; i < ehdr.e_phnum; i++) { 286dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Parse the program header */ 2876b657472331ddb2cf5286167ff2460047a321be7Mike Dodd get_remote_struct(pid, (char *) (ptr+i), &phdr, 288dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sizeof(Elf32_Phdr)); 289849249064cae9c1bb23b0204b5d35b832567801eBruce Beare#ifdef __arm__ 290dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Found a EXIDX segment? */ 291dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (phdr.p_type == PT_ARM_EXIDX) { 292dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi->exidx_start = mi->start + phdr.p_offset; 293dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi->exidx_end = mi->exidx_start + phdr.p_filesz; 294dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 295dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 296849249064cae9c1bb23b0204b5d35b832567801eBruce Beare#endif 297dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 298ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu 299ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu /* Try to load symbols from this file */ 300ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu mi->symbols = symbol_table_create(mi->name); 301dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 302dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 303dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 304dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 305dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid dump_crash_report(int tfd, unsigned pid, unsigned tid, bool at_fault) 306dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 307dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char data[1024]; 308dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project FILE *fp; 309dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mapinfo *milist = 0; 310dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned int sp_list[STACK_CONTENT_DEPTH]; 311dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int stack_depth; 312849249064cae9c1bb23b0204b5d35b832567801eBruce Beare#ifdef __arm__ 313dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int frame0_pc_sane = 1; 314849249064cae9c1bb23b0204b5d35b832567801eBruce Beare#endif 31509e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 316dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (!at_fault) { 317dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project _LOG(tfd, true, 318dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project "--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---\n"); 319dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project _LOG(tfd, true, "pid: %d, tid: %d\n", pid, tid); 320dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 321dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 322dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dump_registers(tfd, tid, at_fault); 32309e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 324dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Clear stack pointer records */ 325dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memset(sp_list, 0, sizeof(sp_list)); 326dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 327dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sprintf(data, "/proc/%d/maps", pid); 328dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fp = fopen(data, "r"); 329dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(fp) { 330dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while(fgets(data, 1024, fp)) { 331dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mapinfo *mi = parse_maps_line(data); 332dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(mi) { 333dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mi->next = milist; 334dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project milist = mi; 335dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 336dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 337dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fclose(fp); 338dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 339dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 340ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu parse_elf_info(milist, tid); 341dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 342849249064cae9c1bb23b0204b5d35b832567801eBruce Beare#if __arm__ 343dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* If stack unwinder fails, use the default solution to dump the stack 344dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * content. 345dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 346dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project stack_depth = unwind_backtrace_with_ptrace(tfd, tid, milist, sp_list, 347dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project &frame0_pc_sane, at_fault); 348dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 349dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* The stack unwinder should at least unwind two levels of stack. If less 350dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * level is seen we make sure at lease pc and lr are dumped. 351dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 352dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (stack_depth < 2) { 353dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dump_pc_and_lr(tfd, tid, milist, stack_depth, at_fault); 354dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 355dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 356c031a3b006129ca408eaade325a53a334daee3b2Hristo Bojinov dump_randomization_base(tfd, at_fault); 3572854db8969cd061d83a931769dfaf4e57108d9dfBen Cheng dump_stack_and_code(tfd, tid, milist, stack_depth, sp_list, at_fault); 3586cc492308712613cd23bee9240b1757428841a2fBruce Beare#elif __i386__ 3596cc492308712613cd23bee9240b1757428841a2fBruce Beare /* If stack unwinder fails, use the default solution to dump the stack 3606cc492308712613cd23bee9240b1757428841a2fBruce Beare * content. 3616cc492308712613cd23bee9240b1757428841a2fBruce Beare */ 3626cc492308712613cd23bee9240b1757428841a2fBruce Beare stack_depth = unwind_backtrace_with_ptrace_x86(tfd, tid, milist,at_fault); 3636cc492308712613cd23bee9240b1757428841a2fBruce Beare#else 3646cc492308712613cd23bee9240b1757428841a2fBruce Beare#error "Unsupported architecture" 365849249064cae9c1bb23b0204b5d35b832567801eBruce Beare#endif 366dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 367dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while(milist) { 368dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mapinfo *next = milist->next; 369ae7b91b68008ab09635a97a18e7d07a35e8404aaMeng Hu symbol_table_free(milist->symbols); 370dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project free(milist); 371dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project milist = next; 372dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 373dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 374dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 375dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define MAX_TOMBSTONES 10 376dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 377dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define typecheck(x,y) { \ 378dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project typeof(x) __dummy1; \ 379dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project typeof(y) __dummy2; \ 380dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (void)(&__dummy1 == &__dummy2); } 381dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 382dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define TOMBSTONE_DIR "/data/tombstones" 383dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 384dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 385dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * find_and_open_tombstone - find an available tombstone slot, if any, of the 386dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * form tombstone_XX where XX is 00 to MAX_TOMBSTONES-1, inclusive. If no 387dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * file is available, we reuse the least-recently-modified file. 388dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 389dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int find_and_open_tombstone(void) 390dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 391dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned long mtime = ULONG_MAX; 392dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct stat sb; 393dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char path[128]; 394dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd, i, oldest = 0; 395dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 396dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* 397dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * XXX: Our stat.st_mtime isn't time_t. If it changes, as it probably ought 398dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * to, our logic breaks. This check will generate a warning if that happens. 399dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 400dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project typecheck(mtime, sb.st_mtime); 401dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 402dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* 403dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * In a single wolf-like pass, find an available slot and, in case none 404dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * exist, find and record the least-recently-modified file. 405dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 406dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 0; i < MAX_TOMBSTONES; i++) { 407dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", i); 408dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 409dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (!stat(path, &sb)) { 410dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (sb.st_mtime < mtime) { 411dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project oldest = i; 412dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mtime = sb.st_mtime; 413dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 414dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 415dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 416dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (errno != ENOENT) 417dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 418dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 419dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0600); 420dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (fd < 0) 421dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; /* raced ? */ 422dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 423dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fchown(fd, AID_SYSTEM, AID_SYSTEM); 424dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return fd; 425dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 426dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 427dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* we didn't find an available file, so we clobber the oldest one */ 428dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project snprintf(path, sizeof(path), TOMBSTONE_DIR"/tombstone_%02d", oldest); 429dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600); 430dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fchown(fd, AID_SYSTEM, AID_SYSTEM); 431dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 432dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return fd; 433dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 434dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 435dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* Return true if some thread is not detached cleanly */ 436dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic bool dump_sibling_thread_report(int tfd, unsigned pid, unsigned tid) 437dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 438dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char task_path[1024]; 439dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 440dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sprintf(task_path, "/proc/%d/task", pid); 441dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project DIR *d; 442dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct dirent *de; 443dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int need_cleanup = 0; 444dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 445dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project d = opendir(task_path); 446dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Bail early if cannot open the task directory */ 447dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (d == NULL) { 448dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("Cannot open /proc/%d/task\n", pid); 449dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return false; 450dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 451dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while ((de = readdir(d)) != NULL) { 452dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned new_tid; 453dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Ignore "." and ".." */ 45409e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) 455dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 456dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project new_tid = atoi(de->d_name); 457dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* The main thread at fault has been handled individually */ 458dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (new_tid == tid) 459dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 460dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 461dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Skip this thread if cannot ptrace it */ 462dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (ptrace(PTRACE_ATTACH, new_tid, 0, 0) < 0) 463dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 464dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 465dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dump_crash_report(tfd, pid, new_tid, false); 466dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project need_cleanup |= ptrace(PTRACE_DETACH, new_tid, 0, 0); 467dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 468dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project closedir(d); 469dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return need_cleanup != 0; 470dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 471dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 472dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* Return true if some thread is not detached cleanly */ 47309e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Chengstatic bool engrave_tombstone(unsigned pid, unsigned tid, int debug_uid, 474dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int signal) 475dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 476dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 477dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project bool need_cleanup = false; 478dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 479dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project mkdir(TOMBSTONE_DIR, 0755); 480dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project chown(TOMBSTONE_DIR, AID_SYSTEM, AID_SYSTEM); 481dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 482dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = find_and_open_tombstone(); 483dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (fd < 0) 484dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return need_cleanup; 485dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 486dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dump_crash_banner(fd, pid, tid, signal); 487dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dump_crash_report(fd, pid, tid, true); 48809e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng /* 489dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * If the user has requested to attach gdb, don't collect the per-thread 490dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * information as it increases the chance to lose track of the process. 491dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 492dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if ((signed)pid > debug_uid) { 493dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project need_cleanup = dump_sibling_thread_report(fd, pid, tid); 494dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 495dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 496dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 497dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return need_cleanup; 498dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 499dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 500dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int 501dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectwrite_string(const char* file, const char* string) 502dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 503dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int len; 504dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 505dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ssize_t amt; 506dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = open(file, O_RDWR); 507dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len = strlen(string); 508dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (fd < 0) 509dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -errno; 510dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project amt = write(fd, string, len); 511dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 512dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return amt >= 0 ? 0 : -errno; 513dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 514dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 515dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic 516dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid init_debug_led(void) 517dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 518dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // trout leds 519dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/red/brightness", "0"); 520dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/green/brightness", "0"); 521dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/blue/brightness", "0"); 522dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/red/device/blink", "0"); 523dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // sardine leds 524dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/left/cadence", "0,0"); 525dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 526dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 527dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic 528dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid enable_debug_led(void) 529dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 530dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // trout leds 531dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/red/brightness", "255"); 532dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // sardine leds 533dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/left/cadence", "1,0"); 534dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 535dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 536dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic 537dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid disable_debug_led(void) 538dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 539dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // trout leds 540dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/red/brightness", "0"); 541dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project // sardine leds 542dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write_string("/sys/class/leds/left/cadence", "0,0"); 543dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 544dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 545dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern int init_getevent(); 546dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern void uninit_getevent(); 547dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern int get_event(struct input_event* event, int timeout); 548dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 549dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void wait_for_user_action(unsigned tid, struct ucred* cr) 550dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 551dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (void)tid; 552dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* First log a helpful message */ 553dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG( "********************************************************\n" 5543bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden "* Process %d has been suspended while crashing. To\n" 5553bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden "* attach gdbserver for a gdb connection on port 5039:\n" 5563bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden "*\n" 5573bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden "* adb shell gdbserver :5039 --attach %d &\n" 5583bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden "*\n" 5593bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden "* Press HOME key to let the process continue crashing.\n" 56009e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng "********************************************************\n", 561dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project cr->pid, cr->pid); 562dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 5633bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden /* wait for HOME key (TODO: something useful for devices w/o HOME key) */ 564dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (init_getevent() == 0) { 565dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int ms = 1200 / 10; 566dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int dit = 1; 567dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int dah = 3*dit; 568dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int _ = -dit; 569dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int ___ = 3*_; 570dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int _______ = 7*_; 571dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const signed char codes[] = { 572dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project dit,_,dit,_,dit,___,dah,_,dah,_,dah,___,dit,_,dit,_,dit,_______ 573dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project }; 574dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t s = 0; 575dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct input_event e; 576dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int home = 0; 577dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project init_debug_led(); 578dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project enable_debug_led(); 579dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project do { 580dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int timeout = abs((int)(codes[s])) * ms; 581dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int res = get_event(&e, timeout); 582dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (res == 0) { 583dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (e.type==EV_KEY && e.code==KEY_HOME && e.value==0) 584dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project home = 1; 585dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else if (res == 1) { 586dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (++s >= sizeof(codes)/sizeof(*codes)) 587dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project s = 0; 588dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (codes[s] > 0) { 589dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project enable_debug_led(); 590dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 591dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project disable_debug_led(); 592dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 593dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 59409e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng } while (!home); 595dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project uninit_getevent(); 596dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 597dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 598dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* don't forget to turn debug led off */ 599dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project disable_debug_led(); 60009e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 601dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* close filedescriptor */ 602dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("debuggerd resuming process %d", cr->pid); 603dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 604dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 605dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void handle_crashing_process(int fd) 606dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 607dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char buf[64]; 608dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct stat s; 609dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned tid; 610dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct ucred cr; 61109e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng int n, len, status; 612dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int tid_attach_status = -1; 613dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned retry = 30; 614dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project bool need_cleanup = false; 615dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 616dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char value[PROPERTY_VALUE_MAX]; 617dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_get("debug.db.uid", value, "-1"); 618dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int debug_uid = atoi(value); 61909e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 620dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("handle_crashing_process(%d)\n", fd); 62109e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 622dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project len = sizeof(cr); 623dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project n = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &len); 624dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(n != 0) { 625dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("cannot get credentials\n"); 626dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 627dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 628dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 62909e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng XLOG("reading tid\n"); 630dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(fd, F_SETFL, O_NONBLOCK); 631dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while((n = read(fd, &tid, sizeof(unsigned))) != sizeof(unsigned)) { 632dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(errno == EINTR) continue; 633dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(errno == EWOULDBLOCK) { 634dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(retry-- > 0) { 635dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project usleep(100 * 1000); 636dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 637dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 638dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("timed out reading tid\n"); 639dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 640dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 641dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("read failure? %s\n", strerror(errno)); 642dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 643dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 644dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 64502526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner snprintf(buf, sizeof buf, "/proc/%d/task/%d", cr.pid, tid); 646dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(stat(buf, &s)) { 6473bfdcc979da0f857b014318f3df5d95a0f93eb27Andy McFadden LOG("tid %d does not exist in pid %d. ignoring debug request\n", 648dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project tid, cr.pid); 649dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 650dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 651dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 65209e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 653dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("BOOM: pid=%d uid=%d gid=%d tid=%d\n", cr.pid, cr.uid, cr.gid, tid); 654dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 65502526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner /* Note that at this point, the target thread's signal handler 65602526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner * is blocked in a read() call. This gives us the time to PTRACE_ATTACH 65702526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner * to it before it has a chance to really fault. 65802526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner * 65902526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner * After the attach, the thread is stopped, and we write to the file 66002526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner * descriptor to ensure that it will run as soon as we call PTRACE_CONT 66102526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner * below. See details in bionic/libc/linker/debugger.c, in function 66202526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner * debugger_signal_handler(). 66302526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner */ 664dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project tid_attach_status = ptrace(PTRACE_ATTACH, tid, 0, 0); 66502526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner 66602526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner TEMP_FAILURE_RETRY(write(fd, &tid, 1)); 66702526d486803de153d03851f4d5f9be7c555e46cDavid 'Digit' Turner 668dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(tid_attach_status < 0) { 669dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("ptrace attach failed: %s\n", strerror(errno)); 670dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 671dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 672dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 673dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 674dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = -1; 675dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 676dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for(;;) { 677dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project n = waitpid(tid, &status, __WALL); 67809e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 679dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(n < 0) { 680dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(errno == EAGAIN) continue; 681dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("waitpid failed: %s\n", strerror(errno)); 682dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 683dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 684dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 685dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("waitpid: n=%d status=%08x\n", n, status); 686dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 687dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(WIFSTOPPED(status)){ 688dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project n = WSTOPSIG(status); 689dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project switch(n) { 690dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGSTOP: 691dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("stopped -- continuing\n"); 692dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project n = ptrace(PTRACE_CONT, tid, 0, 0); 693dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(n) { 694dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("ptrace failed: %s\n", strerror(errno)); 695dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 696dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 697dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 69809e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 699dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGILL: 700dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGABRT: 701dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGBUS: 702dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGFPE: 703dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGSEGV: 704dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case SIGSTKFLT: { 705dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("stopped -- fatal signal\n"); 706dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project need_cleanup = engrave_tombstone(cr.pid, tid, debug_uid, n); 707dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project kill(tid, SIGSTOP); 708dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 709dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 710dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 711dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project default: 712dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("stopped -- unexpected signal\n"); 713dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 714dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 715dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 716dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("unexpected waitpid response\n"); 717dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto done; 718dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 719dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 72009e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 721dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectdone: 722dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project XLOG("detaching\n"); 72309e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 724dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* stop the process so we can debug */ 725dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project kill(cr.pid, SIGSTOP); 726dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 72709e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng /* 72809e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng * If a thread has been attached by ptrace, make sure it is detached 729dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * successfully otherwise we will get a zombie. 73009e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng */ 731dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (tid_attach_status == 0) { 732dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int detach_status; 733dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* detach so we can attach gdbserver */ 734dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project detach_status = ptrace(PTRACE_DETACH, tid, 0, 0); 735dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project need_cleanup |= (detach_status != 0); 736dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 737dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 738dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* 739dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * if debug.db.uid is set, its value indicates if we should wait 740dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * for user action for the crashing process. 741dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * in this case, we log a message and turn the debug LED on 742dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * waiting for a gdb connection (for instance) 743dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 744dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 745dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if ((signed)cr.uid <= debug_uid) { 746dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project wait_for_user_action(tid, &cr); 747dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 748dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 749dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* resume stopped process (so it can crash in peace) */ 750dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project kill(cr.pid, SIGCONT); 751dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 752dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (need_cleanup) { 753dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("debuggerd committing suicide to free the zombie!\n"); 754dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project kill(getpid(), SIGKILL); 755dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 756dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 757dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(fd != -1) close(fd); 758dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 759dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 760849249064cae9c1bb23b0204b5d35b832567801eBruce Beare 76109e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Chengint main() 762dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 763dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int s; 764dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct sigaction act; 765849249064cae9c1bb23b0204b5d35b832567801eBruce Beare int logsocket = -1; 76609e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 76709e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng logsocket = socket_local_client("logd", 768dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_DGRAM); 769dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(logsocket < 0) { 770dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project logsocket = -1; 771dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 772dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(logsocket, F_SETFD, FD_CLOEXEC); 773dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 774dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 775dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project act.sa_handler = SIG_DFL; 776dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sigemptyset(&act.sa_mask); 777dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sigaddset(&act.sa_mask,SIGCHLD); 778dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project act.sa_flags = SA_NOCLDWAIT; 779dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sigaction(SIGCHLD, &act, 0); 78009e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 78109e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng s = socket_local_server("android:debuggerd", 782dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM); 783dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(s < 0) return -1; 784dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(s, F_SETFD, FD_CLOEXEC); 785dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 786dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project LOG("debuggerd: " __DATE__ " " __TIME__ "\n"); 78709e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 788dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for(;;) { 789dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct sockaddr addr; 790dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project socklen_t alen; 791dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 79209e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 793dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project alen = sizeof(addr); 794dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = accept(s, &addr, &alen); 795dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(fd < 0) continue; 79609e713789e31f640a80af1cddb2fc40cbeb02ad5Ben Cheng 797dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(fd, F_SETFD, FD_CLOEXEC); 798dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 799dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project handle_crashing_process(fd); 800dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 801dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 802dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 803