1.什么是tombstone
當一個動態庫（native 程序）開始執行時，系統會注冊一些連接到 debuggerd 的 signal handlers，當系統 crash 的時候，會保存一個 tombstone 文件到/data/tombstones目錄下（Logcat中也會有相應的信息），文件的確就像墓碑一樣記錄了死亡了的進程的基本信息（例如進程的進程號，線程號），死亡的地址（在哪個地址上發生了 Crash），死亡時的現場是什么樣的（記錄了一系列的堆棧調用信息）等等。
2.tombstone文件長什么樣
一個tombstone文件大概包含以下信息
--------- beginning of crash F/libc ( 244): invalid address or address of corrupt block 0xb82f54a0 passed to dlfree I/libc ( 244): debuggerd_signal_handler called: signal=11, fn=0xb6fbdaa1 F/libc ( 244): Fatal signal 11 (SIGSEGV), code 1, fault addr 0xdeadbaad in tid 244 (mediaserver) I/libc ( 244): exit from debuggerd_signal_handler W/NativeCrashListener( 916): Couldn't find ProcessRecord for pid 244 I/DEBUG ( 241): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** E/DEBUG ( 241): AM write failure (32 / Broken pipe) I/DEBUG ( 241): Build fingerprint: XXXXXXXXX I/DEBUG ( 241): Revision: '0' I/DEBUG ( 241): ABI: 'arm' I/DEBUG ( 241): pid: 244, tid: 244, name: mediaserver >>> /system/bin/mediaserver <<< I/DEBUG ( 241): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0xdeadbaad I/art ( 3078): now dumpable=1 I/DEBUG ( 241): Abort message: 'invalid address or address of corrupt block 0xb82f54a0 passed to dlfree' I/DEBUG ( 241): r0 00000000 r1 b6f20dec r2 deadbaad r3 00000000 I/DEBUG ( 241): r4 b82f54a0 r5 b6f220f8 r6 00000000 r7 42424242 I/DEBUG ( 241): r8 ffffffff r9 b82f5460 sl 00000030 fp 00000000 I/DEBUG ( 241): ip 00000000 sp beb2c020 lr b6ef1fa7 pc b6ef1fa8 cpsr 600e0030 I/DEBUG ( 241): d0 0000000000000000 d1 6f2073736572646c I/DEBUG ( 241): d2 707572726f632066 d3 206b636f6c622072 I/DEBUG ( 241): d4 4242424242424242 d5 4242424242424242 I/DEBUG ( 241): d6 4242424242424242 d7 3ecccccd42424242 I/DEBUG ( 241): d8 0000000000000000 d9 0000000000000000 I/DEBUG ( 241): d10 0000000000000000 d11 0000000000000000 I/DEBUG ( 241): d12 0000000000000000 d13 0000000000000000 I/DEBUG ( 241): d14 0000000000000000 d15 0000000000000000 I/DEBUG ( 241): d16 0000000000000000 d17 3ff0000000000000 I/DEBUG ( 241): d18 7e37e43c8800759c d19 bfd5f3f082400000 I/DEBUG ( 241): d20 3e66376972bea4d0 d21 bf66b12699b6468f I/DEBUG ( 241): d22 3fc54aa75950670f d23 bfd73498f0a5ef3a I/DEBUG ( 241): d24 3fe0000000000000 d25 bfaaf3ec933c988f I/DEBUG ( 241): d26 0000000000000000 d27 4000000000000000 I/DEBUG ( 241): d28 4002e6931e14bde7 d29 3faaf3ec9198f99c I/DEBUG ( 241): d30 3ff0000000000000 d31 3fd29572efd86cee I/DEBUG ( 241): scr 20000010 I/DEBUG ( 241): I/DEBUG ( 241): backtrace: I/DEBUG ( 241): #00 pc 00028fa8 /system/lib/libc.so (dlfree+1239) I/DEBUG ( 241): #01 pc 0000f2cb /system/lib/libc.so (free+10) I/DEBUG ( 241): #02 pc 0000a1cb /system/lib/libstagefright_foundation.so (_ZN7android7ABufferD2Ev+42) I/DEBUG ( 241): #03 pc 0000a211 /system/lib/libstagefright_foundation.so (_ZN7android7ABufferD0Ev+4) I/DEBUG ( 241): #04 pc 0000d68d /system/lib/libutils.so (_ZNK7android7RefBase9decStrongEPKv+40) I/DEBUG ( 241): #05 pc 0005adfd /system/lib/libstagefright.so (_ZN7android2spINS_13GraphicBufferEED2Ev+10) I/DEBUG ( 241): #06 pc 0007cd0f /system/lib/libstagefright.so (_ZN7android14MPEG4Extractor10parseChunkEPxi+634) I/DEBUG ( 241): #07 pc 0007d43d /system/lib/libstagefright.so (_ZN7android14MPEG4Extractor10parseChunkEPxi+2472) I/DEBUG ( 241): #08 pc 0007e873 /system/lib/libstagefright.so (_ZN7android14MPEG4Extractor12readMetaDataEv+58) I/DEBUG ( 241): #09 pc 0007eaa1 /system/lib/libstagefright.so (_ZN7android14MPEG4Extractor11countTracksEv+4) I/DEBUG ( 241): #10 pc 000acf9d /system/lib/libstagefright.so (_ZN7android13ExtendedUtils29MediaExtractor_CreateIfNeededENS_2spINS_14MediaExtractorEEERKNS1_INS_10DataSourceEEEPKc+60) I/DEBUG ( 241): #11 pc 0008e3f5 /system/lib/libstagefright.so (_ZN7android14MediaExtractor6CreateERKNS_2spINS_10DataSourceEEEPKc+624) I/DEBUG ( 241): #12 pc 0006ace9 /system/lib/libstagefright.so (_ZN7android13AwesomePlayer15setDataSource_lERKNS_2spINS_10DataSourceEEE+12) I/DEBUG ( 241): #13 pc 0006c0dd /system/lib/libstagefright.so (_ZN7android13AwesomePlayer13setDataSourceEixx+228) I/DEBUG ( 241): #14 pc 0003d647 /system/lib/libmediaplayerservice.so (_ZN7android18MediaPlayerService6Client13setDataSourceEixx+362) I/DEBUG ( 241): #15 pc 0005ea03 /system/lib/libmedia.so (_ZN7android13BnMediaPlayer10onTransactEjRKNS_6ParcelEPS1_j+478) I/DEBUG ( 241): #16 pc 00017fad /system/lib/libbinder.so (_ZN7android7BBinder8transactEjRKNS_6ParcelEPS1_j+60) I/DEBUG ( 241): #17 pc 0001cfdb /system/lib/libbinder.so (_ZN7android14IPCThreadState14executeCommandEi+562) I/DEBUG ( 241): #18 pc 0001d12f /system/lib/libbinder.so (_ZN7android14IPCThreadState20getAndExecuteCommandEv+38) I/DEBUG ( 241): #19 pc 0001d171 /system/lib/libbinder.so (_ZN7android14IPCThreadState14joinThreadPoolEb+48) I/DEBUG ( 241): #20 pc 00001721 /system/bin/mediaserver I/DEBUG ( 241): #21 pc 0000f411 /system/lib/libc.so (__libc_init+44) I/DEBUG ( 241): #22 pc 00001998 /system/bin/mediaserver I/DEBUG ( 241): I/DEBUG ( 241): stack: I/DEBUG ( 241): beb2bfe0 00000000 I/DEBUG ( 241): beb2bfe4 29ec038f I/DEBUG ( 241): beb2bfe8 0009eb34 I/DEBUG ( 241): beb2bfec b82f54a0 [heap] I/DEBUG ( 241): beb2bff0 b6f220f8 I/DEBUG ( 241): beb2bff4 00000000 I/DEBUG ( 241): beb2bff8 42424242 I/DEBUG ( 241): beb2bffc b6edb3d1 /system/lib/libc.so (__libc_fatal_no_abort+16) I/DEBUG ( 241): beb2c000 b6f12f97 /system/lib/libc.so I/DEBUG ( 241): beb2c004 beb2c014 [stack] I/DEBUG ( 241): beb2c008 b6f167be /system/lib/libc.so I/DEBUG ( 241): beb2c00c b6ef1fa7 /system/lib/libc.so (dlfree+1238) I/DEBUG ( 241): beb2c010 b6f12f97 /system/lib/libc.so I/DEBUG ( 241): beb2c014 b82f54a0 [heap] I/DEBUG ( 241): beb2c018 b6f167be /system/lib/libc.so I/DEBUG ( 241): beb2c01c b82f54b0 [heap] I/DEBUG ( 241): #00 beb2c020 b82f5460 [heap] ......
它包含了發生問題的進程ID信息
I/DEBUG ( 241): pid: 244, tid: 244, name: mediaserver >>> /system/bin/mediaserver <<<
當 tid == pid 時，問題發生在父進程，反之問題發生在子進程，從上面的日志信息可以看出發生問題的進程是mediaserver的子進程。
Terminated signal 和 fault address 信息
F/libc ( 244): Fatal signal 11 (SIGSEGV), code 1, fault addr 0xdeadbaad in tid 244 (mediaserver)
這里的信息說明出現進程 Crash 的原因是因為程序產生了段錯誤的信號，訪問了非法的內存空間，而訪問的非法地址是 0xdeadbaad。
信號機制是 Linux 進程間通信的一種重要方式，Linux 信號一方面用於正常的進程間通信和同步，如任務控制(SIGINT, SIGTSTP,SIGKILL, SIGCONT，……)；另一方面，它還負責監控系統異常及中斷。 當應用程序運行異常時， Linux 內核將產生錯誤信號並通知當前進程。 當前進程在接收到該錯誤信號后，可以有三種不同的處理方式。
（1）忽略該信號。
（2）捕捉該信號並執行對應的信號處理函數(signal handler)。
（3）執行該信號的缺省操作(如 SIGSEGV， 其缺省操作是終止進程)。
當 Linux 應用程序在執行時發生嚴重錯誤，一般會導致程序 crash。其中，Linux 專門提供了一類 crash 信號，在程序接收到此類信號時，缺省操作是將 crash 的現場信息記錄到 core 文件，然后終止進程。
crash 信號列表：
| Signal | Description |
|---|---|
| SIGSEGV | Invalid memory reference. |
| SIGBUS | Access to an undefined portion of a memory object. |
| SIGFPE | Arithmetic operation error, like divide by zero. |
| SIGILL | Illegal instruction, like execute garbage or a privileged instruction |
| SIGSYS | Bad system call. |
| SIGXCPU | CPU time limit exceeded. |
| SIGXFSZ | File size limit exceeded. |
定義在prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.8/sysroot/usr/include/bits/signum.h
/* Signals. */ #define SIGHUP 1 /* Hangup (POSIX). */ #define SIGINT 2 /* Interrupt (ANSI). */ #define SIGQUIT 3 /* Quit (POSIX). */ #define SIGILL 4 /* Illegal instruction (ANSI). */ #define SIGTRAP 5 /* Trace trap (POSIX). */ #define SIGABRT 6 /* Abort (ANSI). */ #define SIGIOT 6 /* IOT trap (4.2 BSD). */ #define SIGBUS 7 /* BUS error (4.2 BSD). */ #define SIGFPE 8 /* Floating-point exception (ANSI). */ #define SIGKILL 9 /* Kill, unblockable (POSIX). */ #define SIGUSR1 10 /* User-defined signal 1 (POSIX). */ #define SIGSEGV 11 /* Segmentation violation (ANSI). */ #define SIGUSR2 12 /* User-defined signal 2 (POSIX). */ #define SIGPIPE 13 /* Broken pipe (POSIX). */ #define SIGALRM 14 /* Alarm clock (POSIX). */ #define SIGTERM 15 /* Termination (ANSI). */ #define SIGSTKFLT 16 /* Stack fault. */ #define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */ #define SIGCHLD 17 /* Child status has changed (POSIX). */ #define SIGCONT 18 /* Continue (POSIX). */ #define SIGSTOP 19 /* Stop, unblockable (POSIX). */ #define SIGTSTP 20 /* Keyboard stop (POSIX). */ #define SIGTTIN 21 /* Background read from tty (POSIX). */ #define SIGTTOU 22 /* Background write to tty (POSIX). */ #define SIGURG 23 /* Urgent condition on socket (4.2 BSD). */ #define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */ #define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */ #define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */ #define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */ #define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */ #define SIGPOLL SIGIO /* Pollable event occurred (System V). */ #define SIGIO 29 /* I/O now possible (4.2 BSD). */ #define SIGPWR 30 /* Power failure restart (System V). */ #define SIGSYS 31 /* Bad system call. */ #define SIGUNUSED 31 #define _NSIG 65 /* Biggest signal number + 1 (including real-time signals). */
3.怎么分析tombstone文件
我們主要關注 backtrace 下面的內容，它保存了發生 crash 時候的函數調用關系，但是需要注意的是它的調用順序是從下向上執行的（#XX pc -->#00 pc）,通過這些函數調用關系，我們就可以大概定位出問題發生的地方，在本次 tombstone 日志中，我們通過
I/DEBUG ( 241): #00 pc 00028fa8 /system/lib/libc.so (dlfree+1239) I/DEBUG ( 241): #01 pc 0000f2cb /system/lib/libc.so (free+10) I/DEBUG ( 241): #02 pc 0000a1cb /system/lib/libstagefright_foundation.so (_ZN7android7ABufferD2Ev+42) I/DEBUG ( 241): #03 pc 0000a211 /system/lib/libstagefright_foundation.so (_ZN7android7ABufferD0Ev+4) I/DEBUG ( 241): #04 pc 0000d68d /system/lib/libutils.so (_ZNK7android7RefBase9decStrongEPKv+40)
可以分析出問題是在調用free函數時發生了指針錯誤，還可以看出問題發生的原因是libstagefright_foundation.so中釋放了兩次ABuffer引用,接着就去分析是誰誰釋放的AUbffer強指針。
I/DEBUG ( 241): #05 pc 0005adfd /system/lib/libstagefright.so (_ZN7android2spINS_13GraphicBufferEED2Ev+10) I/DEBUG ( 241): #06 pc 0007cd0f /system/lib/libstagefright.so (_ZN7android14MPEG4Extractor10parseChunkEPxi+634) I/DEBUG ( 241): #07 pc 0007d43d /system/lib/libstagefright.so (_ZN7android14MPEG4Extractor10parseChunkEPxi+2472) I/DEBUG ( 241): #08 pc 0007e873 /system/lib/libstagefright.so (_ZN7android14MPEG4Extractor12readMetaDataEv+58)
可以看出來在 libstagefright 動態庫中的MPEG4Extractor.cpp 的 parseChunk函數出現的錯誤。
4.一些分析工具
雖然通過 tombstone 的日志文件我們就可以大致定位出引發 crash 的代碼的位置，但是通過借助一些分析工具，可以大大的提高工作效率和准確性，下面就來介紹以下這些工具。
（1）addr2line
addr2line 是 用來獲得指定動態鏈接庫文件或者可執行文件中指定地址對應的源代碼信息的工具
它的各種參數如下所示（這個是google aosp android M 中帶的）：
~/source/google_android/prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9/bin$ ./x86_64-linux-android-addr2line -h Usage: ./x86_64-linux-android-addr2line [option(s)] [addr(s)] Convert addresses into line number/file name pairs. If no addresses are specified on the command line, they will be read from stdin The options are: @<file> Read options from <file> -a --addresses Show addresses -b --target=<bfdname> Set the binary file format -e --exe=<executable> Set the input file name (default is a.out) -i --inlines Unwind inlined functions -j --section=<name> Read section-relative offsets instead of addresses -p --pretty-print Make the output easier to read for humans -s --basenames Strip directory names -f --functions Show function names -C --demangle[=style] Demangle function names -h --help Display this information -v --version Display the program's version ./x86_64-linux-android-addr2line: supported targets: elf64-x86-64 elf32-i386 elf32-x86-64 a.out-i386-linux pei-i386 pei-x86-64 elf64-l1om elf64-k1om elf64-little elf64-big elf32-little elf32-big plugin srec symbolsrec verilog tekhex binary ihex Report bugs to <http://source.android.com/source/report-bugs.html>
addr2line 的基本用法如下所示：
./prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.8/bin/arm-linux-androideabi-addr2line -f -e out/debug/target/product/XXXX/symbols/system/lib/libstagefright.so 0007cd0f _ZN7android14MPEG4Extractor10parseChunkEPxi /home/XXX/source/XXX/LINUX/android/frameworks/av/media/libstagefright/MPEG4Extractor.cpp:2180 (discriminator 1)
這里需要注意的是不能直接使用out/debug/target/product/XXX/system/lib/libstagefright.so，會出現運行上面命令之后顯示
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因為這個動態庫是最后要打包到最后生成的system.ing中的，所以它不包含調試符號信息。
（2）ndk-stack
Android NDK 自從版本 r6開始, 提供了一個工具 ndk-stack。這個工具能自動分析 tombstone 文件, 能將崩潰時的調用內存地址和 c++ 代碼一行一行對應起來.
它的使用方法為
./ndk-stack Usage: ndk-stack -sym <path> [-dump <path>] -sym Contains full path to the root directory for symbols. -dump Contains full path to the file containing the crash dump. This is an optional parameter. If ommited, ndk-stack will read input data from stdin See docs/NDK-STACK.html in your NDK installation tree for more details.
①dump 參數很容易理解, 即 dump 下來的 log 文本文件. ndk-stack會分析此文件。
②sym 參數就是你android項目下，編譯成功之后，obj目錄下的文件（android系統源碼o 中帶有符號信息的文件）。
我們可以使用它來分析我們的log文件
ndk-stack -sym xxx.so -dump logfile
所以我們在調試android系統源碼的時候也可以直接分析log中的crash信息。
adb shell logcat | ndk-stack -sym out/debug/target/product/XXXX/symbols/system/lib/xxx.so
（3）stack.py
stack.py工具就是要把backtrace通過addr2line工具一次性把addr對應到代碼
#!/usr/bin/python2.4 -E import getopt import os import re import string import sys import getpass import urllib import subprocess def PrintUsage(): print print " usage: " + sys.argv[0] + " [options] [FILE]" print print " --symbols-dir=path" print " the path to a symbols dir, such as =/tmp/out/target/product/dream/symbols" print print " --symbols-zip=path" print " the path to a symbols zip file, such as =dream-symbols-12345.zip" print print " --auto" print " attempt to:" print " 1) automatically find the build number in the crash" print " 2) if it's an official build, download the symbols " print " from the build server, and use them" print print " FILE should contain a stack trace in it somewhere" print " the tool will find that and re-print it with" print " source files and line numbers. If you don't" print " pass FILE, or if file is -, it reads from" print " stdin." print sys.exit(1) def FindSymbolsDir(): cmd = "CALLED_FROM_SETUP=true make -f build/core/envsetup.mk " \ + "dumpvar-abs-TARGET_OUT_UNSTRIPPED" stream = os.popen(cmd) str = stream.read() stream.close() return str.strip() # returns a list containing the function name and the file/lineno def CallAddr2Line(lib, addr): uname = os.uname()[0] if uname == "Darwin": proc = os.uname()[-1] if proc == "i386": uname = "darwin-x86" else: uname = "darwin-ppc" if lib != "": #cmd = "./prebuilt/" + uname + "/toolchain-eabi-4.2.1/bin/arm-eabi-addr2line" \ #cmd = "./prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.7/bin/arm-linux-androideabi-addr2line" \ cmd = " arm-eabi-addr2line" \ + " -f -e " + SYMBOLS_DIR + lib \ + " 0x" + addr stream = os.popen(cmd) lines = stream.readlines() list = map(string.strip, lines) else: list = [] if list != []: # Name like "move_forward_type<JavaVMOption>" causes troubles mangled_name = re.sub('<', '\<', list[0]); mangled_name = re.sub('>', '\>', mangled_name); #cmd = "./prebuilt/" + uname + "/toolchain-eabi-4.2.1/bin/arm-eabi-c++filt "\ cmd = "./prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.7/bin/arm-linux-androideabi-c++filt "\ + mangled_name stream = os.popen(cmd) list[0] = stream.readline() stream.close() list = map(string.strip, list) else: list = [ "(unknown)", "(unknown)" ] return list class SSOCookie(object): """ creates a cookie file so we can download files from the build server """ def __init__(self, cookiename=".sso.cookie", keep=False): self.sso_server = "login.corp.google.com" self.name = cookiename self.keeper = keep self.tmp_opts = ".curl.options" if not os.path.exists(self.name): user = os.environ['USER'] print "\n%s, to access the symbols, please enter your LDAP " % user, password = getpass.getpass() params = urllib.urlencode({"u": user, "pw": password}) fd = os.open(self.tmp_opts, os.O_RDWR | os.O_CREAT, 0600) os.write(fd, '-b "%s"\n' % self.name) os.write(fd, '-c "%s"\n' % self.name) os.write(fd, '-s"\n-L\n-d "%s"\n' % params) os.write(fd, 'url = "https://%s/login?ssoformat=CORP_SSO"\n' % self.sso_server) # login to SSO response = os.popen("/usr/bin/curl -K %s" % self.tmp_opts) response.close() if os.path.exists(self.tmp_opts): os.remove(self.tmp_opts) if os.path.exists(self.name): os.chmod(self.name, 0600) else: print "Could not log in to SSO" sys.exit(1) def __del__(self): """clean up""" if not self.keeper: os.remove(self.name) class NoBuildIDException(Exception): pass def FindBuildFingerprint(lines): """ Searches the given file (array of lines) for the build fingerprint information """ fingerprint_regex = re.compile("^.*Build fingerprint:\s'(?P<fingerprint>.*)'") for line in lines: fingerprint_search = fingerprint_regex.match(line.strip()) if fingerprint_search: return fingerprint_search.group('fingerprint') return None # didn't find the fingerprint string, so return none class SymbolDownloadException(Exception): pass DEFAULT_SYMROOT = "/tmp/symbols" def DownloadSymbols(fingerprint, cookie): """ Attempts to download the symbols from the build server, extracts them, and returns the path. Takes the fingerprint from the pasted stack trace and the SSOCookie """ if fingerprint is None: return (None, None) symdir = "%s/%s" % (DEFAULT_SYMROOT, hash(fingerprint)) if not os.path.exists(symdir): os.makedirs(symdir) # build server figures out the branch based on the CL params = { 'op': "GET-SYMBOLS-LINK", 'fingerprint': fingerprint, } url = urllib.urlopen("http://android-build/buildbot-update?", urllib.urlencode(params)).readlines()[0] if url == "": raise SymbolDownloadException, "Build server down? Failed to find syms..." regex_str = (r'(?P<baseURL>http\:\/\/android-build\/builds\/.*\/[0-9]+' + r'\/)(?P<img>.*)') url_regex = re.compile(regex_str) url_match = url_regex.match(url) if url_match is None: raise SymbolDownloadException, "Unexpected results from build server URL..." baseURL = url_match.group('baseURL') img = url_match.group('img') symbolfile = img.replace("-img-", "-symbols-") symurl = baseURL + symbolfile localsyms = symdir + symbolfile if not os.path.exists(localsyms): print "downloading %s ..." % symurl curlcmd = ("""/usr/bin/curl -b %s -sL -w %%{http_code} -o %s %s""" % (cookie.name, localsyms, symurl)) (fi,fo,fe) = os.popen3(curlcmd) fi.close() code = fo.read() err = fe.read() if err != "": raise SymbolDownloadException, "stderr from curl download: %s" % err if code != "200": raise SymbolDownloadException, "Faied to download %s" % symurl else: print "using existing cache for symbols" print "extracting %s..." % symbolfile saveddir = os.getcwd() os.chdir(symdir) unzipcode = subprocess.call(["unzip", "-qq", "-o", localsyms]) if unzipcode > 0: raise SymbolDownloadException, ("failed to extract symbol files (%s)." % localsyms) os.chdir(saveddir) return (symdir, "%s/out/target/product/dream/symbols" % symdir) def UnzipSymbols(symbolfile): """Unzips a file to DEFAULT_SYMROOT and returns the unzipped location. Args: symbolfile: The .zip file to unzip Returns: A tuple containing (the directory into which the zip file was unzipped, the path to the "symbols" directory in the unzipped file). To clean up, the caller can delete the first element of the tuple. Raises: SymbolDownloadException: When the unzip fails. """ symdir = "%s/%s" % (DEFAULT_SYMROOT, hash(symbolfile)) if not os.path.exists(symdir): os.makedirs(symdir) print "extracting %s..." % symbolfile saveddir = os.getcwd() os.chdir(symdir) unzipcode = subprocess.call(["unzip", "-qq", "-o", symbolfile]) if unzipcode > 0: raise SymbolDownloadException, ("failed to extract symbol files (%s)." % symbolfile) os.chdir(saveddir) return (symdir, "%s/out/target/product/dream/symbols" % symdir) def PrintTraceLines(traceLines): maxlen = max(map(lambda tl: len(tl[1]), traceLines)) print print "Stack Trace:" print " ADDR " + "FUNCTION".ljust(maxlen) + " FILE:LINE" for tl in traceLines: print " " + tl[0] + " " + tl[1].ljust(maxlen) + " " + tl[2] return def PrintValueLines(valueLines): print print "Stack Data:" print " ADDR VALUE " + "FILE:LINE/FUNCTION" for vl in valueLines: print " " + vl[1] + " " + vl[2] + " " + vl[4] if vl[4] != "": print " " + vl[3] return def ConvertTrace(lines): PROCESS_INFO_LINE = re.compile("(pid: [0-9]+, tid: [0-9]+.*)") SIGNAL_LINE = re.compile("(signal [0-9]+ \(.*\).*)") REGISTER_LINE = re.compile("(([ ]*[0-9a-z]{2} [0-9a-f]{8}){4})") TRACE_LINE = re.compile("(.*)\#([0-9]+) (..) ([0-9a-f]{3})([0-9a-f]{5}) ([^\r\n \t]*)") VALUE_LINE = re.compile("(.*)([0-9a-f]{2})([0-9a-f]{6}) ([0-9a-f]{3})([0-9a-f]{5}) ([^\r\n \t]*)") THREAD_LINE = re.compile("(.*)(\-\-\- ){15}\-\-\-") traceLines = [] valueLines = [] for line in lines: header = PROCESS_INFO_LINE.search(line) if header: print header.group(1) continue header = SIGNAL_LINE.search(line) if header: print header.group(1) continue header = REGISTER_LINE.search(line) if header: print header.group(1) continue if TRACE_LINE.match(line): match = TRACE_LINE.match(line) groups = match.groups() if groups[5] == "<unknown>" or groups[5] == "[heap]" or groups[5] == "[stack]": traceLines.append((groups[3]+groups[4], groups[5], groups[5])) else: info = CallAddr2Line(groups[5], groups[4]) traceLines.append((groups[3]+groups[4], info[0], info[1])) if VALUE_LINE.match(line): match = VALUE_LINE.match(line) groups = match.groups() if groups[5] == "<unknown>" or groups[5] == "[heap]" or groups[5] == "[stack]" or groups[5] == "": valueLines.append((groups[0], groups[1]+groups[2], groups[3]+groups[4], groups[5], "")) else: info = CallAddr2Line(groups[5], groups[4]) valueLines.append((groups[0], groups[1]+groups[2], groups[3]+groups[4], info[0], info[1])) header = THREAD_LINE.search(line) if header: if len(traceLines) > 0: PrintTraceLines(traceLines) if len(valueLines) > 0: PrintValueLines(valueLines) traceLines = [] valueLines = [] print print "-----------------------------------------------------\n" if len(traceLines) > 0: PrintTraceLines(traceLines) if len(valueLines) > 0: PrintValueLines(valueLines) SYMBOLS_DIR = FindSymbolsDir() if __name__ == '__main__': try: options, arguments = getopt.getopt(sys.argv[1:], "", ["auto", "symbols-dir=", "symbols-zip=", "help"]) except getopt.GetoptError, error: PrintUsage() AUTO = False zipArg = None for option, value in options: if option == "--help": PrintUsage() elif option == "--symbols-dir": SYMBOLS_DIR = value elif option == "--symbols-zip": zipArg = value elif option == "--auto": AUTO = True if len(arguments) > 1: PrintUsage() if AUTO: cookie = SSOCookie(".symbols.cookie") if len(arguments) == 0 or arguments[0] == "-": print "Reading native crash info from stdin" f = sys.stdin else: print "Searching for native crashes in %s" % arguments[0] f = open(arguments[0], "r") lines = f.readlines() rootdir = None if AUTO: fingerprint = FindBuildFingerprint(lines) print "fingerprint:", fingerprint rootdir, SYMBOLS_DIR = DownloadSymbols(fingerprint, cookie) elif zipArg is not None: rootdir, SYMBOLS_DIR = UnzipSymbols(zipArg) print "Reading symbols from", SYMBOLS_DIR lines = ConvertTrace(lines) if rootdir is not None: # be a good citizen and clean up...os.rmdir and os.removedirs() don't work cmd = "rm -rf \"%s\"" % rootdir print "\ncleaning up (%s)" % cmd os.system(cmd) # vi: ts=2 sw=2
使用方法：
python stack.py --symbols-dir=out/target/profuct/XXX/sysbols/ tombstone-00(tombstone文件)