How to trace JavaScript function enter/exit event?

[Cong Zuo]

Hey guys, I want to trace JavaScript function enter and exit events to generate function calling graphs just like DTrace/SystemTap could do.

e.g.

  0  <- rl_getc
  0  <- rl_read_key
  0  -> _rl_dispatch
  0    -> _rl_dispatch_subseq
  0      -> rl_insert
  0        -> _rl_insert_char
  0          -> _rl_any_typein
  0          <- _rl_any_typein
  0          -> rl_insert_text
  0          <- rl_insert_text
  0        <- _rl_insert_char
  0      <- rl_insert
  0    <- _rl_dispatch_subseq
  0  <- _rl_dispatch
  0  -> rl_redisplay
  0    -> _rl_move_cursor_relative
  0    <- _rl_move_cursor_relative
  0    -> _rl_output_some_chars
  0    <- _rl_output_some_chars
  0  <- rl_redisplay
  0  <- readline_internal_char
  0  -> readline_internal_char
  0    -> _rl_init_argument
  0    <- _rl_init_argument
  0    -> rl_read_key
  0      -> _rl_next_macro_key
  0      <- _rl_next_macro_key
  0      -> rl_getc

And I found that it's kind of easy to probe function enter, but I couldn't find a place appropriate place to probe function exit.

What I'm considering are: 1) frame destructor;  2) `Return` ignition handler.

Any advises would be appreciated! Thanks!

[Jakob Kummerow]

V8 already has a --trace flag that does precisely this.

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[Cong Zuo]

Haha, pardon me for this silly question! Just forget about this option...

Thank you Jakob!

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