lldb_debug_buserror

Last login: Wed Dec 18 12:10:55 on ttys006
mzyy94:~ mzyy94$ cd /Volumes/RamDisk/
mzyy94:RamDisk mzyy94$ gcc -g bus_error.c
mzyy94:RamDisk mzyy94$ lldb -- a.out
Current executable set to 'a.out' (x86_64).
(lldb) settings set target.run-args 0
(lldb) run
Process 67334 launched: '/Volumes/RamDisk/a.out' (x86_64)
Process 67334 stopped
* thread #1: tid = 0x50c5f, 0x0000000100000f43 a.out`main(argc=2, argv=0x00007fff5fbff838) + 115 at bus_error.c:9, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=2, address=0x100005000)
    frame #0: 0x0000000100000f43 a.out`main(argc=2, argv=0x00007fff5fbff838) + 115 at bus_error.c:9
   6   		for(int i = 0; ; i++){
   7   			switch(mode) {
   8   				case '0':
-> 9   					c[0] = s[i];
   10  					break;
   11  				case '1':
   12  					s[i] = '\0';
(lldb) disassemble --line
a.out`main + 111 at bus_error.c:9
   8   				case '0':
   9   					c[0] = s[i];
   10  					break;
   0x100000f3f:  movslq -24(%rbp), %rcx
-> 0x100000f43:  movb   (%rax,%rcx), %dl
   0x100000f46:  movb   %dl, -17(%rbp)
(lldb) settings set target.run-args 1
(lldb) run
There is a running process, kill it and restart?: [Y/n]
Process 87838 launched: '/Volumes/RamDisk/a.out' (x86_64)
Process 87838 stopped
* thread #1: tid = 0x56584, 0x0000000100000f59 a.out`main(argc=2, argv=0x00007fff5fbff838) + 137 at bus_error.c:12, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=2, address=0x100002000)
    frame #0: 0x0000000100000f59 a.out`main(argc=2, argv=0x00007fff5fbff838) + 137 at bus_error.c:12
   9   					c[0] = s[i];
   10  					break;
   11  				case '1':
-> 12  					s[i] = '\0';
   13  					break;
   14  				case '2':
   15  					s[0] = c[i];
(lldb) disassemble --line
a.out`main + 133 at bus_error.c:12
   11  				case '1':
   12  					s[i] = '\0';
   13  					break;
   0x100000f55:  movslq -24(%rbp), %rcx
-> 0x100000f59:  movb   $0, (%rax,%rcx)
(lldb) settings set target.run-args 2
(lldb) run
There is a running process, kill it and restart?: [Y/n]
Process 94596 launched: '/Volumes/RamDisk/a.out' (x86_64)
Process 94596 stopped
* thread #1: tid = 0x5820c, 0x0000000100000f66 a.out`main(argc=2, argv=0x00007fff5fbff838) + 150 at bus_error.c:15, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=1, address=0x7fff5fc87000)
    frame #0: 0x0000000100000f66 a.out`main(argc=2, argv=0x00007fff5fbff838) + 150 at bus_error.c:15
   12  					s[i] = '\0';
   13  					break;
   14  				case '2':
-> 15  					s[0] = c[i];
   16  					break;
   17  				default:
   18  					c[i] = '\0';
(lldb) disassemble --line
a.out`main + 146 at bus_error.c:15
   14  				case '2':
   15  					s[0] = c[i];
   16  					break;
   0x100000f62:  movslq -24(%rbp), %rax
-> 0x100000f66:  movb   -17(%rbp,%rax), %cl
   0x100000f6a:  movb   %cl, 144(%rip)
(lldb) settings set target.run-args 3
(lldb) run
There is a running process, kill it and restart?: [Y/n]
Process 95499 launched: '/Volumes/RamDisk/a.out' (x86_64)
Process 95499 stopped
* thread #1: tid = 0x585d2, 0x0000000100000f79 a.out`main(argc=0, argv=0x0000000000000000) + 169 at bus_error.c:18, queue = 'com.apple.main-thread, stop reason = EXC_BAD_ACCESS (code=2, address=0x7fff5fc00000)
    frame #0: 0x0000000100000f79 a.out`main(argc=0, argv=0x0000000000000000) + 169 at bus_error.c:18
   15  					s[0] = c[i];
   16  					break;
   17  				default:
-> 18  					c[i] = '\0';
   19  			}
   20  		}
   21  		return 0;
(lldb) disassemble --line
a.out`main + 165 at bus_error.c:18
   17  				default:
   18  					c[i] = '\0';
   19  			}
   0x100000f75:  movslq -24(%rbp), %rax
-> 0x100000f79:  movb   $0, -17(%rbp,%rax)
(lldb)