接下来,我们以一个简单的core dump程序为例,来说说调试core dump的六种经验和方法,希望能对大家的开发实战有所帮助,顺便地,横扫那些简单的面试题。 本文示例的core dump程序如下: #include <stdio.h> void swap(int *px, int *py) { int tmp = *px; *px = *py; *py = tmp; } int main() { in...
用gdb进行查看core文件的内容, 以定位文件中引发core dump的行. gdb [exec file] [core file] 如: gdb ./test test.core 在进入gdb后, 用bt命令查看backtrace以检查发生程序运行到哪里, 来定位core dump的文件->行.
-1, 0) = 0xa07000[0086f4cd] close(3) = 0[0086f6d3] mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb770f000[0085a552] set_thread_area({entry_number:-1 -> 6, base_addr:0xb770f6c0, limit:1048575, seg_32bit:1, contents...
static int LogType = SOCK_DGRAM; /* type of socket connection / static int LogFile = -1; / fd for log / static int connected; / have done connect / static int LogStat; / status bits, set by openlog() */ static const char LogTag; / string to tag the entry with / static int ...
* The directory in which the core dump file is to be created does not exist. * The RLIMIT_CORE (core file size) or RLIMIT_FSIZE (file size) resource limits for the process are set to zero; see getrlimit(2) and the documentation of the shell’s ulimit command (limit in csh(1)). ...
return -1; } printf("Before set rlimit CORE dump current is:%d, max is:%d\n", (int)corelimit.rlim_cur, (int)corelimit.rlim_max); /* set core size to unlimited, RLIM_INFINITY:unlimted,1024*1024:1M*/ corelimit.rlim_cur = RLIM_INFINITY; /*1M*/ ...
* The directory in which the core dump file is to be created does not exist. * The RLIMIT_CORE (core file size) or RLIMIT_FSIZE (file size) resource limits for the process are set to zero; see getrlimit(2) and the documentation of the shell’s ulimit command (limit in csh(1)). ...
1 I have no idea, and the answer lies probably inside the kernel source code (because there is no specification related to that). Why do you ask? With current disks, a 64Mb core dump limit is still small, and would very probably contain enough information. Why do you need to set the...
You can use setrlimit to set a lower limit on core dump size, at the risk of ending up with a core dump that you can't decode (because it's incomplete).Share Improve this answer Follow answered May 4, 2010 at 5:02 David Gelhar 27.9k33 gold badges6868 silver badges8585 bronze ...
首先能想到的是在Linux环境下最常见的程序崩溃/出错的场景就是访问非法内存导致的Segmentation Fault,得到进程的core dump,用GDB进行core文件的分析,从而找到程序故障点。 上述过程是非常显而易见的,在服务器,台式机,笔记本电脑这些平台上屡试不爽。 但是,在嵌入式系统上会有surprise!