osx - Weird lldb behavior (comparing to gdb) C -

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i come freebsd , i'm used debug gdb, unfortunately, gdb not natif on macbook, wanted debug using lldb.

unfortunately, don't understand weird behavior :

when launch c program , breakpoint on 1 function, , launch using "run", go breakpoint appears can read through in assembly code = hard debuging, not in gdb straight line line => easy debuging

look @ .c, (i know code awful it's not point, it's trying set lldb properly)

int ft_count_point(char *m, int i) {     int count;     int count_c;      count = 0;     count_c = 0;     while (m[i] != '\0' || (m[i] != '\n' && m[i + 1] != '\n'))     {         if (m[i] == '.')         {             count_c++;             count++;         }         if (m[i] == '\n' || m[i] == '#')             count++;         i++;     }     if (count != 20 && count_c != 16)         return (1);     exit (0); }

the main function contains call on fonction , return 0.

look @ using lldb breakpoint on ft_count_point:

(lldb) target create "./a.out" current executable set './a.out' (x86_64). (lldb) settings set -- target.run-args  "tests/error1" (lldb) b ft_count_point breakpoint 1: = a.out`ft_count_point + 35     @ ft_count_point.c:5, address = 0x00000001000073e3 (lldb) r process 17302 launched: './a.out' (x86_64) addresssanitizer debugger support active. memory error breakpoint has been installed , can use 'memory history' command. process 17302 stopped * thread #1: tid = 0x43c1e7, 0x00007fff5fc01000 dyld`_dyld_start,                    stop reason = exec     frame #0: 0x00007fff5fc01000 dyld`_dyld_start dyld`_dyld_start: ->  0x7fff5fc01000 <+0>: popq   %rdi     0x7fff5fc01001 <+1>: pushq  $0x0     0x7fff5fc01003 <+3>: movq   %rsp, %rbp     0x7fff5fc01006 <+6>: andq   $-0x10, %rsp

i can go step step seriously, it's waste of time.

looks program re-exec's - maybe asan doing you? can see in lldb output, says:

* thread #1: tid = 0x43c1e7, 0x00007fff5fc01000 dyld`_dyld_start,                    stop reason = exec

if had hit breakpoint, reason stop reason = breakpoint 1.1 or whatever breakpoint number appropriate.

in lldb, stop on re-exec, guess gdb auto-continues after exec, why didn't notice in gdb. should able continue, , hit real breakpoint in bit.

might idea have setting control whether continue past exec or not. feel free file bug lldb.llvm.org bug reporter.


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