diff options
Diffstat (limited to 'erts/preloaded/src/erl_tracer.erl')
| -rw-r--r-- | erts/preloaded/src/erl_tracer.erl | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/erts/preloaded/src/erl_tracer.erl b/erts/preloaded/src/erl_tracer.erl new file mode 100644 index 0000000000..2177e48f60 --- /dev/null +++ b/erts/preloaded/src/erl_tracer.erl @@ -0,0 +1,42 @@ +-module(erl_tracer). + +-export([enabled/3, trace/6, on_load/0]). + +-type tracee() :: port() | pid() | undefined. +-type trace_tag() :: send | send_to_non_existing_process | 'receive' | + call | return_to | return_from | exception_from | + spawn | spawned | exit | link | unlink | getting_linked | + getting_unlinked | register | unregister | in | out | + in_exiting | out_exiting | out_exited | + open | closed | gc_start | gc_end. +-type trace_opts() :: #{ match_spec_result => true | term(), + scheduler_id => undefined | non_neg_integer(), + timestamp => undefined | timestamp | cpu_timestamp | + monotonic | strict_monotonic }. +-type tracer_state() :: term(). + +on_load() -> + case erlang:load_nif(atom_to_list(?MODULE), 0) of + ok -> ok + end. + +%%% +%%% NIF placeholders +%%% + +-spec enabled(Tag :: trace_tag() | seq_trace | trace_status, + TracerState :: tracer_state(), + Tracee :: tracee()) -> + trace | discard | remove. +enabled(_, _, _) -> + erlang:nif_error(nif_not_loaded). + +-spec trace(Tag :: trace_tag() | seq_trace, + TracerState :: tracer_state(), + Tracee :: tracee(), + Msg :: term(), + Extra :: term(), + Opts :: trace_opts()) -> any(). + +trace(_, _, _, _, _, _) -> + erlang:nif_error(nif_not_loaded). |