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| author | Lukas Larsson <[email protected]> | 2015-12-10 11:10:46 +0100 |
|---|---|---|
| committer | Lukas Larsson <[email protected]> | 2016-04-15 15:06:27 +0200 |
| commit | 37092dab15448ef6a078800e3ff0cc41880ea765 (patch) | |
| tree | cb8a30fe427cec5f82d96b3e05258d4fd263e58f /erts/emulator/beam/atom.names | |
| parent | 13bd4ca2493d8a76f9d835c27163b56ba86c2aef (diff) | |
| download | otp-37092dab15448ef6a078800e3ff0cc41880ea765.tar.gz otp-37092dab15448ef6a078800e3ff0cc41880ea765.tar.bz2 otp-37092dab15448ef6a078800e3ff0cc41880ea765.zip | |
erts: Implement tracer modules
Add the possibility to use modules as trace data receivers. The functions
in the module have to be nifs as otherwise complex trace probes will be
very hard to handle (complex means trace probes for ports for example).
This commit changes the way that the ptab->tracer field works from always
being an immediate, to now be NIL if no tracer is present or else be
the tuple {TracerModule, TracerState} where TracerModule is an atom that
is later used to lookup the appropriate tracer callbacks to call and
TracerState is just passed to the tracer callback. The default process and
port tracers have been rewritten to use the new API.
This commit also changes the order which trace messages are delivered to the
potential tracer process. Any enif_send done in a tracer module may be delayed
indefinitely because of lock order issues. If a message is delayed any other
trace message send from that process is also delayed so that order is preserved
for each traced entity. This means that for some trace events (i.e. send/receive)
the events may come in an unintuitive order (receive before send) to the
trace receiver. Timestamps are taken when the trace message is generated so
trace messages from differented processes may arrive with the timestamp
out of order.
Both the erlang:trace and seq_trace:set_system_tracer accept the new tracer
module tracers and also the backwards compatible arguments.
OTP-10267
Diffstat (limited to 'erts/emulator/beam/atom.names')
| -rw-r--r-- | erts/emulator/beam/atom.names | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names index d466f00028..aeea6cc989 100644 --- a/erts/emulator/beam/atom.names +++ b/erts/emulator/beam/atom.names @@ -197,6 +197,7 @@ atom dirty_cpu_schedulers_online atom dirty_io atom disable_trace atom disabled +atom discard atom display_items atom dist atom dist_cmd @@ -231,6 +232,7 @@ atom exception_trace atom extended atom Eq='=:=' atom Eqeq='==' +atom erl_tracer atom erlang atom ERROR='ERROR' atom error_handler @@ -353,6 +355,7 @@ atom match atom match_limit atom match_limit_recursion atom match_spec +atom match_spec_result atom max atom maximum atom max_tables max_processes @@ -569,6 +572,7 @@ atom static atom stderr_to_stdout atom stop atom stream +atom strict_monotonic atom strict_monotonic_timestamp atom sunrm atom suspend @@ -596,8 +600,9 @@ atom total_active_tasks atom total_heap_size atom total_run_queue_lengths atom tpkt -atom trace trace_ts traced +atom trace trace_ts traced atom trace_control_word +atom trace_status atom tracer atom trap_exit atom trim |