Screen Dumps

Consider simple program:

void bar(){ sleep(1); }
void foo(){ sleep(1); bar(); }

int main() { for (;;) foo(); }

• version 0.0.3, on FreeBSD 4.6-PRERELEASE. Dumping system calls with fuction stack dump

  yoda:p2:$ xtrace -S -p 76888
  SIGNAL 0
  SIGNAL 17
                                           = 0 
          280c6724 [_nanosleep + 8](1,2804bbf3,28063000,0)
          804855e  [foo + 16](3,4,0,28060100)
          80485a0  [main + 14](1,bfbff70c,bfbff714,293)
          80484a1  [_start + 7d](bfbff810,0,bfbff818,bfbff82b)
  nanosleep([1 s, 0 ms],0xbfbff648)                  = 0 
          280c6724 [_nanosleep + 8](1,bfbff812,80485f8,0)
          8048584  [bar + 10](804860b,2804bbf3,28063000,0)
          804856e  [foo + 26](3,4,0,28060100)
          80485a0  [main + 14](1,bfbff70c,bfbff714,293)
          80484a1  [_start + 7d](bfbff810,0,bfbff818,bfbff82b)
  

• version 0.0.3, on FreeBSD 4.6-PRERELEASE. Tracing calls for functions `foo' and `bar'

  yoda:p2:$ xtrace -f foo,bar -p 76888
  SIGNAL 0
  SIGNAL 17
                                           = 0 
  [bar](0x804860b,0x2804bbf3,0x28063000,0)
  nanosleep([1 s, 0 ms],0xbfbff648)                  = 0 
  [foo](0x3,0x4,0,0x28060100)
  nanosleep([1 s, 0 ms],0xbfbff668)                  = 0 
  [bar](0x804860b,0x2804bbf3,0x28063000,0)