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2024-04-03 10:00:00

Android致命信号11 (SIGSEGV)在0x636f7d89(代码=1)。怎样才能找到它呢?

我一直在阅读其他关于在Android应用程序中获得SIGSEGV的原因的帖子。我计划在我的应用程序中寻找可能与画布使用相关的空指针，但我的SIGSEGV每次都会抛出不同的内存地址。加上code=1和code=2。如果内存地址是0x00000000，我有一个线索，它是一个空指针。

我得到的最后一个是代码=2:

A/libc(4969): Fatal signal 11 (SIGSEGV) at 0x42a637d9 (code=2)

有什么建议吗?

I have a suspect, but I'm not keen on experimenting with it yet. My app uses the OSMDroid API for offline mapping. The OverlayItem class represents markers/nodes on the map. I have a Service that collects data via the network to populate the OverlayItem which are then displayed on the map. In an effort to simplify my design, I extended OverlayItem into my own NodeOverlayItem class, which includes some addition attributes I use in the UI Activity and in the Service. This gave me a single point of Item information for the UI and Service. I used Intents to broadcast to the Activity to refresh the UI map when something changed. The Activity binds to the Service and there's a Service method to get the list of NodeOverlayItem's. I think it might be the OSMDroid API's use of OverlayItem, and my Service updating node information at the same time. (a concurrency issue)

As I write this I think that's really the problem. The headache isn't splitting out the Node and OverlayItem from NodeOverlayItem, it's that the Activity will need some data from the Node, that the Service holds. Plus when the Activity is created (onResume, etc...) the OverlayItem objects will need to be re-created from the Node data that the Service has been maintaining while the Activity was away. e.g. You start the app, the Service collects data, the UI displays it, you go to Home, then back to the app, the Activity will need to pull and re-create the OverlayItem's from the latest Service node data.

我知道这不是一个很好的问题。就好像我所有的SO问题都是小众或模糊的。如果有人对如何解释这些SIGSEGV错误有建议，将不胜感激!

更新 下面是在调试会话期间捕获的最新崩溃。我有3个这样的设备用于测试，当我在开发和测试时，它们都不会可靠地崩溃。我额外添加了一些内容，以便能够注意到GC日志记录。您可以看到，这个问题可能与内存耗尽无关。

03-03 02:02:38.328: I/CommService(7477): Received packet from: 192.168.1.102
03-03 02:02:38.328: I/CommService(7477): Already processed this packet. It's a re-broadcast from another node, or from myself. It's not a repeat broadcast though.
03-03 02:02:38.406: D/CommService(7477): Checking OLSRd info...
03-03 02:02:38.460: D/CommService(7477): Monitoring nodes...
03-03 02:02:38.515: D/dalvikvm(7477): GC_CONCURRENT freed 2050K, 16% free 17151K/20359K, paused 3ms+6ms
03-03 02:02:38.515: I/CommService(7477): Received packet from: 192.168.1.102
03-03 02:02:38.515: D/CommService(7477): Forwarding packet (4f68802cf10684a83ac4936ebb3c934d) along to other nodes.
03-03 02:02:38.609: I/CommService(7477): Received packet from: 192.168.1.100
03-03 02:02:38.609: D/CommService(7477): Forwarding packet (e4bc81e91ec92d06f83e03068f52ab4) along to other nodes.
03-03 02:02:38.609: D/CommService(7477): Already processed this packet: 4204a5b27745ffe5e4f8458e227044bf
03-03 02:02:38.609: A/libc(7477): Fatal signal 11 (SIGSEGV) at 0x68f52abc (code=1)
03-03 02:02:38.914: I/DEBUG(4008): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
03-03 02:02:38.914: I/DEBUG(4008): Build fingerprint: 'Lenovo/IdeaTab_A1107/A1107:4.0.4/MR1/eng.user.20120719.150703:user/release-keys'
03-03 02:02:38.914: I/DEBUG(4008): pid: 7477, tid: 7712  >>> com.test.testm <<<
03-03 02:02:38.914: I/DEBUG(4008): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 68f52abc
03-03 02:02:38.914: I/DEBUG(4008):  r0 68f52ab4  r1 412ef268  r2 4d9c3bf4  r3 412ef268
03-03 02:02:38.914: I/DEBUG(4008):  r4 001ad8f8  r5 4d9c3bf4  r6 412ef268  r7 4c479df8
03-03 02:02:38.914: I/DEBUG(4008):  r8 4d9c3c0c  r9 4c479dec  10 46cf260a  fp 4d9c3c24
03-03 02:02:38.914: I/DEBUG(4008):  ip 40262a04  sp 4d9c3bc8  lr 402d01dd  pc 402d0182  cpsr 00000030
03-03 02:02:38.914: I/DEBUG(4008):  d0  00000001000c0102  d1  3a22364574614c7d
03-03 02:02:38.914: I/DEBUG(4008):  d2  403fc0000000007d  d3  363737343433350a
03-03 02:02:38.914: I/DEBUG(4008):  d4  49544341223a2273  d5  6f6567222c224556
03-03 02:02:38.914: I/DEBUG(4008):  d6  3a223645676e6f4c  d7  000000013835372d
03-03 02:02:38.914: I/DEBUG(4008):  d8  0000000000000000  d9  4040000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d10 0000000000000000  d11 4040000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d12 4040000000000000  d13 0000000000000021
03-03 02:02:38.914: I/DEBUG(4008):  d14 0000000000000000  d15 0000000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d16 3fe62e42fefa39ef  d17 3ff0000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d18 3fe62e42fee00000  d19 0000000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d20 0000000000000000  d21 3ff0000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d22 4028000000000000  d23 3ff0000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d24 0000000000000000  d25 3ff0000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d26 0000000000000000  d27 c028000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d28 0000000000000000  d29 3ff0000000000000
03-03 02:02:38.914: I/DEBUG(4008):  d30 3ff0000000000000  d31 3fecccccb5c28f6e
03-03 02:02:38.914: I/DEBUG(4008):  scr 60000013
03-03 02:02:39.046: I/DEBUG(4008):          #00  pc 0006b182  /system/lib/libcrypto.so (EVP_DigestFinal_ex)
03-03 02:02:39.046: I/DEBUG(4008):          #01  pc 0006b1d8  /system/lib/libcrypto.so (EVP_DigestFinal)
03-03 02:02:39.054: I/DEBUG(4008):          #02  pc 0001f814  /system/lib/libnativehelper.so
03-03 02:02:39.054: I/DEBUG(4008):          #03  pc 0001ec30  /system/lib/libdvm.so (dvmPlatformInvoke)
03-03 02:02:39.054: I/DEBUG(4008):          #04  pc 00058c70  /system/lib/libdvm.so (_Z16dvmCallJNIMethodPKjP6JValuePK6MethodP6Thread)
03-03 02:02:39.054: I/DEBUG(4008): code around pc:
03-03 02:02:39.054: I/DEBUG(4008): 402d0160 0003151e 4604b570 f7ff460d 4620ff81  ....p..F.F.... F
03-03 02:02:39.054: I/DEBUG(4008): 402d0170 f7ff4629 bd70ff93 4604b570 460e6800  )F....p.p..F.h.F
03-03 02:02:39.054: I/DEBUG(4008): 402d0180 68834615 dd062b40 21fa4810 44784a10  .F.h@+...H.!.JxD
03-03 02:02:39.054: I/DEBUG(4008): 402d0190 f7c8447a 6821f80f 698a4620 47904631  zD....!h F.i1F.G
03-03 02:02:39.054: I/DEBUG(4008): 402d01a0 b1154606 68836820 6822602b b12b6a13  .F.. h.h+`"h.j+.
03-03 02:02:39.054: I/DEBUG(4008): code around lr:
03-03 02:02:39.054: I/DEBUG(4008): 402d01bc 68e06821 21006c4a ea0af7c4 bd704630  !h.hJl.!....0Fp.
03-03 02:02:39.054: I/DEBUG(4008): 402d01cc 00031492 000314b5 4604b570 ffcef7ff  ........p..F....
03-03 02:02:39.054: I/DEBUG(4008): 402d01dc 46204605 ff12f7ff bd704628 4604b573  .F F....(Fp.s..F
03-03 02:02:39.054: I/DEBUG(4008): 402d01ec 2102460d fb36f002 42ab6823 b123d020  .F.!..6.#h.B .#.
03-03 02:02:39.054: I/DEBUG(4008): 402d01fc b1136c5b f7c868e0 68a0fccf 05c26025  [l...h.....h%`..
03-03 02:02:39.054: I/DEBUG(4008): memory map around addr 68f52abc:
03-03 02:02:39.054: I/DEBUG(4008): 4d8c5000-4d9c4000 
03-03 02:02:39.054: I/DEBUG(4008): (no map for address)
03-03 02:02:39.054: I/DEBUG(4008): b0001000-b0009000 /system/bin/linker
03-03 02:02:39.054: I/DEBUG(4008): stack:
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3b88  408d1f90  /system/lib/libdvm.so
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3b8c  412ef258  /dev/ashmem/dalvik-heap (deleted)
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3b90  00000001  
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3b94  408d6c58  /system/lib/libdvm.so
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3b98  408d6fa8  /system/lib/libdvm.so
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3b9c  4c479dec  
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3ba0  46cf260a  /system/framework/core.odex
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3ba4  408735e7  /system/lib/libdvm.so
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3ba8  412ef258  /dev/ashmem/dalvik-heap (deleted)
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bac  002bf070  [heap]
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bb0  412ef258  /dev/ashmem/dalvik-heap (deleted)
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bb4  00000000  
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bb8  412ef268  /dev/ashmem/dalvik-heap (deleted)
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bbc  00000000  
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bc0  df0027ad  
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bc4  00000000  
03-03 02:02:39.054: I/DEBUG(4008): #00 4d9c3bc8  001ad8f8  [heap]
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bcc  002ae0b8  [heap]
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bd0  00000004  
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bd4  402d01dd  /system/lib/libcrypto.so
03-03 02:02:39.054: I/DEBUG(4008): #01 4d9c3bd8  001ad8f8  [heap]
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3bdc  002ae0b8  [heap]
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3be0  00000004  
03-03 02:02:39.054: I/DEBUG(4008):     4d9c3be4  4024e817  /system/lib/libnativehelper.so
03-03 02:02:39.406: D/CommService(7477): Checking OLSRd info...
03-03 02:02:39.500: D/CommService(7477): Monitoring nodes...
03-03 02:02:39.500: D/dalvikvm(7477): GC_FOR_ALLOC freed 2073K, 16% free 17118K/20359K, paused 51ms
03-03 02:02:39.632: D/dalvikvm(7477): GC_CONCURRENT freed 1998K, 16% free 17162K/20359K, paused 2ms+4ms
03-03 02:02:40.406: D/CommService(7477): Checking OLSRd info...
03-03 02:02:40.445: D/CommService(7477): Monitoring nodes...
03-03 02:02:40.562: D/dalvikvm(7477): GC_CONCURRENT freed 2045K, 16% free 17158K/20359K, paused 3ms+4ms
03-03 02:02:41.406: D/CommService(7477): Checking OLSRd info...
03-03 02:02:41.445: D/CommService(7477): Monitoring nodes...
03-03 02:02:41.531: D/dalvikvm(7477): GC_CONCURRENT freed 2045K, 16% free 17154K/20359K, paused 3ms+12ms
03-03 02:02:42.406: D/CommService(7477): Checking OLSRd info...
03-03 02:02:42.445: D/CommService(7477): Monitoring nodes...
03-03 02:02:42.507: D/dalvikvm(7477): GC_CONCURRENT freed 2068K, 16% free 17128K/20359K, paused 3ms+4ms
03-03 02:02:42.679: D/dalvikvm(7477): GC_CONCURRENT freed 2006K, 16% free 17161K/20359K, paused 2ms+12ms
03-03 02:02:43.140: I/BootReceiver(1236): Copying /data/tombstones/tombstone_05 to DropBox (SYSTEM_TOMBSTONE)
03-03 02:02:43.210: D/dalvikvm(1236): GC_FOR_ALLOC freed 912K, 17% free 10207K/12295K, paused 62ms
03-03 02:02:43.265: D/dalvikvm(1236): GC_FOR_ALLOC freed 243K, 16% free 10374K/12295K, paused 49ms
03-03 02:02:43.265: I/dalvikvm-heap(1236): Grow heap (frag case) to 10.507MB for 196628-byte allocation

当前回答

我有这个分割错误错误，因为内存问题。 我的结构体有很多变量和数组，数组的大小是1024。

将大小减小到512，错误就消失了。

附注:这是一种变通方法，而不是解决方案。 有必要找到结构的大小和动态内存分配 是更好的选择。

2019-01-28 11:51:57

其他回答

我有这个分割错误错误，因为内存问题。 我的结构体有很多变量和数组，数组的大小是1024。

将大小减小到512，错误就消失了。

附注:这是一种变通方法，而不是解决方案。 有必要找到结构的大小和动态内存分配 是更好的选择。

2019-01-28 11:51:57

首先，获得你的墓碑堆栈跟踪，它将打印每次你的应用程序崩溃。就像这样:

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'XXXXXXXXX'
pid: 1658, tid: 13086  >>> system_server <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 64696f7e
 r0 00000000  r1 00000001  r2 ad12d1e8  r3 7373654d
 r4 64696f72  r5 00000406  r6 00974130  r7 40d14008
 r8 4b857b88  r9 4685adb4  10 00974130  fp 4b857ed8
 ip 00000000  sp 4b857b50  lr afd11108  pc ad115ebc  cpsr 20000030
 d0  4040000040000000  d1  0000004200000003
 d2  4e72cd924285e370  d3  00e81fe04b1b64d8
 d4  3fbc71c7009b64d8  d5  3fe999999999999a
 d6  4010000000000000  d7  4000000000000000
 d8  4000000000000000  d9  0000000000000000
 d10 0000000000000000  d11 0000000000000000
 d12 0000000000000000  d13 0000000000000000
 d14 0000000000000000  d15 0000000000000000
 scr 80000012

         #00  pc 000108d8  /system/lib/libc.so
         #01  pc 0003724c  /system/lib/libxvi020.so
         #02  pc 0000ce02  /system/lib/libxvi020.so
         #03  pc 0000d672  /system/lib/libxvi020.so
         #04  pc 00010cce  /system/lib/libxvi020.so
         #05  pc 00004432  /system/lib/libwimax_jni.so
         #06  pc 00011e74  /system/lib/libdvm.so
         #07  pc 0004354a  /system/lib/libdvm.so
         #08  pc 00017088  /system/lib/libdvm.so
         #09  pc 0001c210  /system/lib/libdvm.so
         #10  pc 0001b0f8  /system/lib/libdvm.so
         #11  pc 00059c24  /system/lib/libdvm.so
         #12  pc 00059e3c  /system/lib/libdvm.so
         #13  pc 0004e19e  /system/lib/libdvm.so
         #14  pc 00011b94  /system/lib/libc.so
         #15  pc 0001173c  /system/lib/libc.so

code around pc:
ad115e9c 4620eddc bf00bd70 0001736e 0001734e 
ad115eac 4605b570 447c4c0a f7f44620 e006edc8 
ad115ebc 42ab68e3 68a0d103 f7f42122 6864edd2 
ad115ecc d1f52c00 44784803 edbef7f4 bf00bd70 
ad115edc 00017332 00017312 2100b51f 46682210 

code around lr:
afd110e8 e2166903 1a000018 e5945000 e1a02004 
afd110f8 e2055a02 e1a00005 e3851001 ebffed92 
afd11108 e3500000 13856002 1a000001 ea000009 
afd11118 ebfffe50 e1a01004 e1a00006 ebffed92 
afd11128 e1a01005 e1550000 e1a02006 e3a03000 

stack:
    4b857b10  40e43be8  
    4b857b14  00857280  
    4b857b18  00000000  
    4b857b1c  034e8968  
    4b857b20  ad118ce9  /system/lib/libnativehelper.so
    4b857b24  00000002  
    4b857b28  00000406

然后，使用addr2line实用程序(在NDK工具链中找到它)来查找崩溃的函数。在本例中，您需要这样做

addr2line -e -f libc.so 0001173c

你会发现问题出在哪里。当然，这不会帮助你，因为它是在libc。

因此，您可以结合使用arm-eabi-objdump的实用程序来找到最终目标。

相信我，这是一项艰巨的任务。

只是为了了解最新情况。我想我从整个源代码树开始做Android原生构建已经有很长一段时间了，直到今天我自己仔细阅读了NDK文档。自发布NDK-r6以来，它提供了一个名为ndk-stack的实用程序。

以下是NDK官方文档中的NDK-r9焦油球内容。

概述:

Ndk-stack是一个简单的工具，允许您过滤堆栈跟踪，因为它们出现在'adb logcat'的输出中，并用相应的:值替换共享库中的任何地址。

简而言之，它将翻译为:

  I/DEBUG   (   31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
  I/DEBUG   (   31): Build fingerprint: 'generic/google_sdk/generic/:2.2/FRF91/43546:eng/test-keys'
  I/DEBUG   (   31): pid: 351, tid: 351  %gt;%gt;%gt; /data/local/ndk-tests/crasher <<<
  I/DEBUG   (   31): signal 11 (SIGSEGV), fault addr 0d9f00d8
  I/DEBUG   (   31):  r0 0000af88  r1 0000a008  r2 baadf00d  r3 0d9f00d8
  I/DEBUG   (   31):  r4 00000004  r5 0000a008  r6 0000af88  r7 00013c44
  I/DEBUG   (   31):  r8 00000000  r9 00000000  10 00000000  fp 00000000
  I/DEBUG   (   31):  ip 0000959c  sp be956cc8  lr 00008403  pc 0000841e  cpsr 60000030
  I/DEBUG   (   31):          #00  pc 0000841e  /data/local/ndk-tests/crasher
  I/DEBUG   (   31):          #01  pc 000083fe  /data/local/ndk-tests/crasher
  I/DEBUG   (   31):          #02  pc 000083f6  /data/local/ndk-tests/crasher
  I/DEBUG   (   31):          #03  pc 000191ac  /system/lib/libc.so
  I/DEBUG   (   31):          #04  pc 000083ea  /data/local/ndk-tests/crasher
  I/DEBUG   (   31):          #05  pc 00008458  /data/local/ndk-tests/crasher
  I/DEBUG   (   31):          #06  pc 0000d362  /system/lib/libc.so
  I/DEBUG   (   31):

进入更具可读性的输出:

  ********** Crash dump: **********
  Build fingerprint: 'generic/google_sdk/generic/:2.2/FRF91/43546:eng/test-keys'
  pid: 351, tid: 351  >>> /data/local/ndk-tests/crasher <<<
  signal 11 (SIGSEGV), fault addr 0d9f00d8
  Stack frame #00  pc 0000841e  /data/local/ndk-tests/crasher : Routine zoo in /tmp/foo/crasher/jni/zoo.c:13
  Stack frame #01  pc 000083fe  /data/local/ndk-tests/crasher : Routine bar in /tmp/foo/crasher/jni/bar.c:5
  Stack frame #02  pc 000083f6  /data/local/ndk-tests/crasher : Routine my_comparison in /tmp/foo/crasher/jni/foo.c:9
  Stack frame #03  pc 000191ac  /system/lib/libc.so
  Stack frame #04  pc 000083ea  /data/local/ndk-tests/crasher : Routine foo in /tmp/foo/crasher/jni/foo.c:14
  Stack frame #05  pc 00008458  /data/local/ndk-tests/crasher : Routine main in /tmp/foo/crasher/jni/main.c:19
  Stack frame #06  pc 0000d362  /system/lib/libc.so

用法:

为此，首先需要一个目录，其中包含应用程序共享库的符号版本。如果你使用NDK构建系统(即NDK -build)，那么这些总是位于$PROJECT_PATH/obj/local/下，其中代表你设备的ABI(即默认情况下的armeabi)。

你可以将logcat文本作为程序的直接输入，例如:

adb logcat | $NDK/ndk-stack -sym $PROJECT_PATH/obj/local/armeabi

或者你可以使用-dump选项指定logcat作为输入文件，例如:

adb logcat > /tmp/foo.txt
$NDK/ndk-stack -sym $PROJECT_PATH/obj/local/armeabi -dump foo.txt

重要的是:

该工具在logcat输出中寻找包含开始的初始行，即看起来像这样:

 *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

当复制/粘贴跟踪时，不要忘记跟踪中的这一行，否则ndk-stack将无法正常工作。

快乐吗?

未来版本的ndk-stack将尝试启动adb logcat并自动选择库路径。现在，您必须手动执行这些步骤。

到目前为止，ndk-stack不处理没有调试信息的库。尝试检测到给定PC地址的最近函数入口点可能是有用的(例如在libc中)。上面的例子)。

2013-08-29 09:36:41

我有SharedPreferences引起的这个问题，我有两个保存数据的方法。一个使用editor.apply()，另一个使用editor.commit()。我把它们都改成了editor.commit()，一切都很顺利。 方法1

    private void saveId(int id) {
    SharedPreferences preferences = getSharedPreferences("saved_id", Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = preferences.edit();
    editor.putInt("bId", id);
    editor.commit();
}

方法2

private void saveUserData(String saveName, String data){
    SharedPreferences preferences = getPreferences(MODE_PRIVATE);
    SharedPreferences.Editor editor = preferences.edit();
    editor.putString(saveName,data);
    editor.commit();
}
2022-05-02 13:59:02

对于在Xamarin项目中遇到此类错误的任何人，都有必要尝试确定导致该问题所需的交互(例如点击按钮)，并放置一个try-catch块以从中获取托管异常。在我的案例中，Android致命信号11 (SIGSEGV)错误最初是由一个托管的c#异常引起的，这个异常可以很容易地修复。我不明白为什么Xamarin不向调试输出报告托管异常。

2022-06-15 18:24:23

我在Android Studio上的Java代码上出现了这个错误

我研究了数百万页，包括这一页中所有先前的答案。但我没有找到任何有用的答案。

最后我检查了所有可能产生误差的位置。

这是我修改前的代码

surfaceView.draw(r1, r2, r3, r4, r5, r8);

这是我的代码，经过修正，错误消失了。

synchronized (this) {
surfaceView.draw(r1, r2, r3, r4, r5, r8);

}

2022-04-18 10:04:14

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