分析 crash 報告的方法

最近上傳的一個app，被蘋果打回來了，原因是在下載完成之前會掛掉。 還帶有4個crash報告。Incident Identifier: 926328CE-927A-4D1B-940C-B17A0CD1A5DB CrashReporter Key: 3af694acc56eb48927bd9022990ac1238a192d06 Hardware Model: iPad2,2 Process: LiBai [6180] Path: /var/mobile/Applications/321E7CC8-5D97-4739-B388-1E49E6A7E2BD/LiBai.app/LiBai Identifier: LiBai Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2011-12-30 10:37:35.221 -0800 OS Version: iPhone OS 5.0.1 (9A405) Report Version: 104 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000000 Crashed Thread: 0 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libsystem_c.dylib 0x32ed2c28 0x32e5d000 + 482344 1 libsystem_c.dylib 0x32ea9bac 0x32e5d000 + 314284 2 libsystem_c.dylib 0x32e73844 0x32e5d000 + 92228 3 LiBai 0x00119028 0x100000 + 102440 4 LiBai 0x00119f04 0x100000 + 106244 5 LiBai 0x0011bd02 0x100000 + 113922 6 LiBai 0x00117de6 0x100000 + 97766 7 LiBai 0x0011818a 0x100000 + 98698 8 CoreFoundation 0x34229224 0x34211000 + 98852 9 LiBai 0x00118c82 0x100000 + 101506 10 Foundation 0x32d51c32 0x32c8b000 + 814130 11 Foundation 0x32ca96e2 0x32c8b000 + 124642 12 Foundation 0x32ca96ac 0x32c8b000 + 124588 13 Foundation 0x32ca95ce 0x32c8b000 + 124366 14 CFNetwork 0x3795989e 0x3794a000 + 63646 15 CFNetwork 0x3794e53e 0x3794a000 + 17726 16 CFNetwork 0x3794e23c 0x3794a000 + 16956 17 CFNetwork 0x3794e172 0x3794a000 + 16754 18 CoreFoundation 0x3429eafc 0x34211000 + 580348 19 CoreFoundation 0x3429e2c8 0x34211000 + 578248 20 CoreFoundation 0x3429d06e 0x34211000 + 573550 21 CoreFoundation 0x342204d6 0x34211000 + 62678 22 CoreFoundation 0x3422039e 0x34211000 + 62366 23 GraphicsServices 0x30b0bfc6 0x30b08000 + 16326 24 UIKit 0x327e873c 0x327b7000 + 202556 25 LiBai 0x00101820 0x100000 + 6176 26 LiBai 0x001017d8 0x100000 + 6104

從這里只能初步判斷是因為訪問了空的內存。但是具體的就不知道了。因為下面的進程調用都是堆棧信息，在網上找了很久終於找到了解決的辦法。

分析crash報告：

1、首先我們需要一個XXXXX.app.dSYM  這個在 Archive 中的 release 版本的 應用程序.xcarchive可以找到，只要在對應的文件上面 右鍵 顯示包內榮，可以看到有一個 dSYMs的文件夾，里面就有我們要的  XXXXX.app.dSYM 文件。

2、下面我們需要 找到  symbolicatecrash

/Developer/Platforms/iPhoneOS.platform/Developer/Library/PrivateFrameworks/DTDeviceKit.framework/Versions/A/Resources/symbolicatecrash)

    3、用終端進入 這個目錄 然后 用   symbolicatecrash  crash 文件   dSYM 文件 > 輸出的文件 這樣的命令就可以導出。Incident Identifier: 9B4E1CA2-CEB5-4777-BD93-FFFD3AC10E0F CrashReporter Key: 3af694acc56eb48927bd9022990ac1238a192d06 Hardware Model: iPad2,2 Process: LiBai [6166] Path: /var/mobile/Applications/321E7CC8-5D97-4739-B388-1E49E6A7E2BD/LiBai.app/LiBai Identifier: LiBai Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2011-12-30 10:36:22.049 -0800 OS Version: iPhone OS 5.0.1 (9A405) Report Version: 104 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000000 Crashed Thread: 0 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libsystem_c.dylib 0x32ed2c28 0x32e5d000 + 482344 1 libsystem_c.dylib 0x32ea9bac 0x32e5d000 + 314284 2 libsystem_c.dylib 0x32e73844 0x32e5d000 + 92228 3 LiBai 0x000a6028 fread_file_func (ioapi.c:97) 4 LiBai 0x000a6f04 unzReadCurrentFile (unzip.c:1279) 5 LiBai 0x000a8d02 -[ZipArchive UnzipFileTo:overWrite:] (ZipArchive.mm:238) 6 LiBai 0x000a4de6 -[booklistViewController OnUnZip] (booklistViewController.m:68) 7 LiBai 0x000a518a -[booklistViewController downloadManagerDataDownloadFinished:] (booklistViewController.m:146) 8 CoreFoundation 0x34229224 0x34211000 + 98852 9 LiBai 0x000a5c82 -[DownloadManager connectionDidFinishLoading:] (DownloadManager.m:138) 10 Foundation 0x32d51c32 0x32c8b000 + 814130 11 Foundation 0x32ca96e2 0x32c8b000 + 124642 12 Foundation 0x32ca96ac 0x32c8b000 + 124588 13 Foundation 0x32ca95ce 0x32c8b000 + 124366 14 CFNetwork 0x3795989e 0x3794a000 + 63646 15 CFNetwork 0x3794e53e 0x3794a000 + 17726 16 CFNetwork 0x3794e23c 0x3794a000 + 16956 17 CFNetwork 0x3794e172 0x3794a000 + 16754 18 CoreFoundation 0x3429eafc 0x34211000 + 580348 19 CoreFoundation 0x3429e2c8 0x34211000 + 578248 20 CoreFoundation 0x3429d06e 0x34211000 + 573550 21 CoreFoundation 0x342204d6 0x34211000 + 62678 22 CoreFoundation 0x3422039e 0x34211000 + 62366 23 GraphicsServices 0x30b0bfc6 0x30b08000 + 16326 24 UIKit 0x327e873c 0x327b7000 + 202556 25 LiBai 0x0008e820 main (main.m:14) 26 LiBai 0x0008e7d8 0x8d000 + 6104