Linux调试之（六）strace命令查找进程卡死原因
strace命令查找进程卡死原因
转载：https://blog.csdn.net/jctian000/article/details/80695025
strace -i a.out
通过strace -i ./a.out定位出core dump的地址， 然后通过addr2line来定位出对应的代码行
https://linux.cn/article-3935-1.html
[taoge@localhost test]$ strace -i ./a.out
[00ff4424] execve("./a.out", ["./a.out"], [/* 22 vars */]) = 0
[0086e2fd] brk(0) = 0x818e000
[0086f6d3] mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb771c000
[0086f5d1] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
[0086f494] open("/etc/ld.so.cache", O_RDONLY) = 3
[0086f45e] fstat64(3, {st_mode=S_IFREG|0644, st_size=49072, ...}) = 0
[0086f6d3] mmap2(NULL, 49072, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7710000
[0086f4cd] close(3) = 0
[0086f494] open("/lib/libc.so.6", O_RDONLY) = 3
[0086f514] read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 N\211\0004\0\0\0"..., 512) = 512
[0086f45e] fstat64(3, {st_mode=S_IFREG|0755, st_size=1855584, ...}) = 0
[0086f6d3] mmap2(0x87e000, 1620360, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x87e000
[0086f754] mprotect(0xa03000, 4096, PROT_NONE) = 0
[0086f6d3] mmap2(0xa04000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x185) = 0xa04000
[0086f6d3] mmap2(0xa07000, 10632, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -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:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
[0086f754] mprotect(0xa04000, 8192, PROT_READ) = 0
[0086f754] mprotect(0x876000, 4096, PROT_READ) = 0
[0086f711] munmap(0xb7710000, 49072) = 0
[00ba1424] fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
[00ba1424] mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb771b000
[00ba1424] write(1, "1, 2, 3\n", 81, 2, 3
) = 8
[00ba1424] write(1, "2, 1, 3\n", 82, 1, 3
) = 8
[08048479] --- SIGSEGV (Segmentation fault) @ 0 (0) ---
[????????] +++ killed by SIGSEGV (core dumped) +++
Segmentation fault (core dumped)
[taoge@localhost test]$ a ddr2line -e a.out 080484
[taoge@localhost test]$ cat test.c -n