3

在我的应用程序中，当我尝试将我的日志打印到当时面临 Segmentation Error 的文件中时。

我正面临致命信号 11 。

我的日志功能在 Native 部分，我从 Java 中调用它。

日志猫：

01-01 00:09:38.968: A/libc(3905): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1)
01-01 00:09:38.976: D/Random(2185): Trip In List :false
01-01 00:09:38.976: D/Random(2185): Odometer :0
01-01 00:09:38.976: D/abc(3905): PreCheck conditions satisfied for WIFI Searching Timer
01-01 00:09:39.601: I/DEBUG(1285): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
01-01 00:09:39.601: I/DEBUG(1285): Build fingerprint: 'android:android:4.0.4/IMM76I/eng.example.20120608.074924:eng/test-keys'
01-01 00:09:39.601: I/DEBUG(1285): pid: 3905, tid: 3908  >>> com.demo.abc <<<
01-01 00:09:39.601: I/DEBUG(1285): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr deadbaad
01-01 00:09:39.601: I/DEBUG(1285):  r0 00000000  r1 00000027  r2 00000048  r3 00000000
01-01 00:09:39.601: I/DEBUG(1285):  r4 00000000  r5 100ffadc  r6 00000000  r7 00000000
01-01 00:09:39.601: I/DEBUG(1285):  r8 016b5760  r9 00000048  10 100ffc98  fp 00006b8b
01-01 00:09:39.601: I/DEBUG(1285):  ip fffc25c4  sp 100ffad8  lr deadbaad  pc 4008ffd8  cpsr 60000130
01-01 00:09:39.601: I/DEBUG(1285):  d0  0000000000000000  d1  0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d2  0000000000000000  d3  0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d4  0000000000000000  d5  0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d6  0000000000000000  d7  0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d8  0000000000000000  d9  0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d10 0000000000000000  d11 0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d12 0000000000000000  d13 0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d14 0000000000000000  d15 0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d16 0000000000000000  d17 0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d18 0000000000000000  d19 0000000421d12176
01-01 00:09:39.601: I/DEBUG(1285):  d20 0000008000000080  d21 0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d22 3fb0f4a31edab38b  d23 3fede16b9c24a98f
01-01 00:09:39.601: I/DEBUG(1285):  d24 3e66376972bea4d0  d25 00000000ffffffff
01-01 00:09:39.601: I/DEBUG(1285):  d26 0000000000000000  d27 3fc554e7eb0eb47c
01-01 00:09:39.601: I/DEBUG(1285):  d28 0000000000000000  d29 0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  d30 0000000000000000  d31 0000000000000000
01-01 00:09:39.601: I/DEBUG(1285):  scr 80000012
01-01 00:09:39.882: I/DEBUG(1285):          #00  pc 00017fd8  /system/lib/libc.so
01-01 00:09:39.882: I/DEBUG(1285):          #01  pc 000096c2  /system/lib/libcutils.so (mspace_merge_objects)
01-01 00:09:39.882: I/DEBUG(1285): code around pc:
01-01 00:09:39.882: I/DEBUG(1285): 4008ffb8 b13cb942 b1196821 6809460c d1fb2900  B.<.!h...F.h.)..
01-01 00:09:39.882: I/DEBUG(1285): 4008ffc8 b31b6963 2eadf64b f6cd2127 24006ead  ci..K...'!...n.$
01-01 00:09:39.882: I/DEBUG(1285): 4008ffd8 1000f88e e812f7f4 f7f52106 a902e8b0  .........!......
01-01 00:09:39.882: I/DEBUG(1285): 4008ffe8 5380f04f 2006460a 94029304 f7f49403  O..S.F. ........
01-01 00:09:39.882: I/DEBUG(1285): 4008fff8 4622ec6c 20024629 ec74f7f4 effef7f3  l."F)F. ..t.....
01-01 00:09:39.882: I/DEBUG(1285): code around lr:
01-01 00:09:39.882: I/DEBUG(1285): deadba8c ffffffff ffffffff ffffffff ffffffff  ................
01-01 00:09:39.882: I/DEBUG(1285): deadba9c ffffffff ffffffff ffffffff ffffffff  ................
01-01 00:09:39.882: I/DEBUG(1285): deadbaac ffffffff ffffffff ffffffff ffffffff  ................
01-01 00:09:39.882: I/DEBUG(1285): deadbabc ffffffff ffffffff ffffffff ffffffff  ................
01-01 00:09:39.882: I/DEBUG(1285): deadbacc ffffffff ffffffff ffffffff ffffffff  ................
01-01 00:09:39.882: I/DEBUG(1285): memory map around addr deadbaad:
01-01 00:09:39.882: I/DEBUG(1285): be9ba000-be9db000 [stack]
01-01 00:09:39.882: I/DEBUG(1285): (no map for address)
01-01 00:09:39.882: I/DEBUG(1285): ffff0000-ffff1000 [vectors]
01-01 00:09:39.882: I/DEBUG(1285): stack:
01-01 00:09:39.882: I/DEBUG(1285):     100ffa98  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffa9c  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffaa0  00000048  
01-01 00:09:39.882: I/DEBUG(1285):     100ffaa4  018b1d10  [heap]
01-01 00:09:39.882: I/DEBUG(1285):     100ffaa8  00000048  
01-01 00:09:39.882: I/DEBUG(1285):     100ffaac  40092bcd  /system/lib/libc.so
01-01 00:09:39.882: I/DEBUG(1285):     100ffab0  400d18b4  
01-01 00:09:39.882: I/DEBUG(1285):     100ffab4  0000000d  
01-01 00:09:39.882: I/DEBUG(1285):     100ffab8  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffabc  40094167  /system/lib/libc.so
01-01 00:09:39.882: I/DEBUG(1285):     100ffac0  40131000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffac4  100ffadc  
01-01 00:09:39.882: I/DEBUG(1285):     100ffac8  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffacc  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffad0  df0027ad  
01-01 00:09:39.882: I/DEBUG(1285):     100ffad4  00000000  
01-01 00:09:39.882: I/DEBUG(1285): #00 100ffad8  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffadc  fffffbdf  
01-01 00:09:39.882: I/DEBUG(1285):     100ffae0  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffae4  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffae8  00000000  
01-01 00:09:39.882: I/DEBUG(1285):     100ffaec  00000000  
01-01 00:09:39.890: I/DEBUG(1285):     100ffaf0  00000000  
01-01 00:09:39.890: I/DEBUG(1285):     100ffaf4  411d0010  /dev/ashmem/dalvik-heap (deleted)
01-01 00:09:39.890: I/DEBUG(1285):     100ffaf8  41227b88  /dev/ashmem/dalvik-heap (deleted)
01-01 00:09:39.890: I/DEBUG(1285):     100ffafc  400e46c5  /system/lib/libcutils.so
01-01 00:09:39.890: I/DEBUG(1285): #01 100ffb00  00000000  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb04  400e46c5  /system/lib/libcutils.so
01-01 00:09:39.890: I/DEBUG(1285):     100ffb08  40000110  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb0c  00000b4c  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb10  411d0018  /dev/ashmem/dalvik-heap (deleted)
01-01 00:09:39.890: I/DEBUG(1285):     100ffb14  00000001  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb18  409cec68  /system/lib/libdvm.so
01-01 00:09:39.890: I/DEBUG(1285):     100ffb1c  40986c37  /system/lib/libdvm.so
01-01 00:09:39.890: I/DEBUG(1285):     100ffb20  00000061  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb24  41226d08  /dev/ashmem/dalvik-heap (deleted)
01-01 00:09:39.890: I/DEBUG(1285):     100ffb28  016b5748  [heap]
01-01 00:09:39.890: I/DEBUG(1285):     100ffb2c  41227a08  /dev/ashmem/dalvik-heap (deleted)
01-01 00:09:39.890: I/DEBUG(1285):     100ffb30  00000000  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb34  100ffdd4  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb38  00000061  
01-01 00:09:39.890: I/DEBUG(1285):     100ffb3c  5109be98  /dev/ashmem/dalvik-bitmap-2 (deleted)
01-01 00:09:39.890: I/DEBUG(1285):     100ffb40  50c4fe98  /dev/ashmem/dalvik-bitmap-1 (deleted)
01-01 00:09:39.890: I/DEBUG(1285):     100ffb44  000074f6  
01-01 00:09:42.085: I/BootReceiver(1427): Copying /data/tombstones/tombstone_01 to DropBox (SYSTEM_TOMBSTONE)

本机零件代码：

void printDebugLog(char *moduleName, char *log, ...)
{
    char logMessage[PATHLENGTH];
    char tempString[PATHLENGTH];

    printf("\nprintDebugLog : 1");
    //fp is null, file is not open.
    va_list arglist;
    printf("\nprintDebugLog : 2");
    va_start(arglist, log);
    printf("\nprintDebugLog : 3");
    vsnprintf(tempString, 1048, log, arglist);
    printf("\nprintDebugLog : 4");
    strcpy(logMessage, APPNAME);
    printf("\nprintDebugLog : 5");
    strcat(logMessage, DEBUG);
    printf("\nprintDebugLog : 6");
    strcat(logMessage, "[");
    printf("\nprintDebugLog : 7");
    strcat(logMessage, timestamp());
    printf("\nprintDebugLog : 8");
    strcat(logMessage, "][");
    printf("\nprintDebugLog : 9");
    strcat(logMessage, moduleName);
    printf("\nprintDebugLog : 10");
    strcat(logMessage, "] ");
    printf("\nprintDebugLog : 11");
    strcat(logMessage, tempString);

    va_end(arglist);


#if defined(CONSOLE_LOG)

    printf("\t%s\n", logMessage);
#endif

    if (g_logFileDesc != NULL)
    {

        if (g_debug)
        {

            //Check File Size.
            /*if (getFileSize(g_logFileDesc) >= MAX_LOG_FILE_SIZE)
            {

                closeLogFile();
                openLogFile();

            }
            if (fprintf(g_logFileDesc, "%s\n", logMessage) != (strlen(logMessage) + 1))
            {

                printf("\nFile Delete start from Queue \n");
                removeUploadQueue();

            }*/

        }

    }
}

如果您想要更多关于此的代码，请告诉我。

等待你的答复....

4

3 回答 3

2

分段错误信号指向某种类型的内存问题，并且考虑到您将 logMessage 和 tmpString 设置为相同的长度，并且您正在使用多个参数以及 tmpString 中的内容填充 logMessage，正如 Peter 所说，您很可能'遇到缓冲区溢出。

最初，logMessage 的长度应该是：MAX_APPNAME_LEN + MAX_DEBUG_LEN + 4 + MAX_TIMESTAMP_LEN + MAX_MODULENAME_LEN + PATHLENGTH。

于 2012-10-07T20:33:40.597 回答
1 
char logMessage[5];
char tempString[5];

strcpy(logMessage, "1234");
strcpy(tempString, "1234");

strcat(logMessage, tempString);

可能（！）造成麻烦？

于 2012-06-28T13:14:28.643 回答
0

附带说明一下，如果您使用的是库，则很难找出库中的哪个位置导致从 Logcat 中查看日志的异常。

  1. 获取最新版本的 Android-NDK。
  2. 将您的 logcat 日志保存在驱动器上的某个位置或直接馈送到 ndk-stack，例如假设您将其保存在 C:\Error.txt
  3. 如果您使用的是 Windows，请打开命令提示符导航到您下载最新 Android-NDK 的目录，然后运行以下命令

ndk-stack -sym C:\Project\libs -dump C:\Error.txt

您可以在 android_ndk_path/docs/NDK-STACK.html 中找到文档

于 2013-01-23T15:56:59.743 回答