[erlang-questions] erlang:exit/1 and erlang:exit/2

Tony Rogvall tony@REDACTED
Tue Jul 29 23:11:10 CEST 2014

On 29 jul 2014, at 21:19, Leo Liu <sdl.web@REDACTED> wrote:

> Hi there,

> Could someone help me understand the implementation of erlang:exit/1?
>  {
>      BIF_P->fvalue = BIF_ARG_1;  /* exit value */
>  }
> which is pretty simple and I am not sure how it propagates the exit
> signal. erlang:exit/2 on the contrary is full of details.

BIFs with one (and more) argument are called from emulator loop in beam_emu.c
(R17 source)
beam_emu.c line 2779 in opcode "call_bif_e"
and line 3571 in opcode "apply_bif"
and line 2610 in "i_gc_bif1_jIsId"

and the rest is just a matter of reading code.
Hint. The function handler_error may be a good start to look in.

Have fun :-)


> Thanks,
> Leo
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