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-rw-r--r--erts/doc/src/erl_tracer.xml358
1 files changed, 351 insertions, 7 deletions
diff --git a/erts/doc/src/erl_tracer.xml b/erts/doc/src/erl_tracer.xml
index 1e8e78b25f..2075b962d8 100644
--- a/erts/doc/src/erl_tracer.xml
+++ b/erts/doc/src/erl_tracer.xml
@@ -54,6 +54,14 @@
</description>
<datatypes>
+ <datatype> <name name="trace_tag_send" /> </datatype>
+ <datatype> <name name="trace_tag_receive" /> </datatype>
+ <datatype> <name name="trace_tag_call" /> </datatype>
+ <datatype> <name name="trace_tag_procs" /> </datatype>
+ <datatype> <name name="trace_tag_ports" /> </datatype>
+ <datatype> <name name="trace_tag_running_procs" /> </datatype>
+ <datatype> <name name="trace_tag_running_ports" /> </datatype>
+ <datatype> <name name="trace_tag_gc" /> </datatype>
<datatype>
<name name="trace_tag" />
<desc>
@@ -105,6 +113,29 @@
<title>CALLBACK FUNCTIONS</title>
<p>The following functions
should be exported from a <c>erl_tracer</c> callback module.</p>
+ <taglist>
+ <tag><seealso marker="#enabled"><c>Module:enabled/3</c></seealso></tag>
+ <item>Mandatory</item>
+ <tag><seealso marker="#trace"><c>Module:trace/6</c></seealso></tag>
+ <item>Mandatory</item>
+ <tag><seealso marker="#enabled_procs"><c>Module:enabled_procs/3</c></seealso></tag>
+ <item>Optional</item>
+ <tag><seealso marker="#trace_procs"><c>Module:trace_procs/6</c></seealso></tag>
+ <item>Optional</item>
+ <tag><seealso marker="#enabled_ports"><c>Module:enabled_ports/3</c></seealso></tag>
+ <item>Optional</item>
+ <tag><seealso marker="#trace_ports"><c>Module:trace_ports/6</c></seealso></tag>
+ <item>Optional</item>
+ <tag><seealso marker="#enabled_running_ports"><c>Module:enabled_running_ports/3</c></seealso></tag>
+ <item>Optional</item>
+ <tag><seealso marker="#trace_running_ports"><c>Module:trace_running_ports/6</c></seealso></tag>
+ <item>Optional</item>
+ <tag><seealso marker="#enabled_running_procs"><c>Module:enabled_running_procs/3</c></seealso></tag>
+ <item>Optional</item>
+ <tag><seealso marker="#trace_running_procs"><c>Module:trace_running_procs/6</c></seealso></tag>
+ <item>Optional</item>
+ </taglist>
+
</section>
<marker id="enabled"></marker>
<funcs>
@@ -114,11 +145,11 @@
<type>
<v>TraceTag = <seealso marker="#type-trace_tag">trace_tag()</seealso> | trace_status</v>
<v>TracerState = term()</v>
- <v>Tracee = <seealso marker="#type-trace_tag">tracee()</seealso></v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
<v>Result = trace | discard | remove</v>
</type>
<desc>
- <p>This callback will be called whenever a trace point is triggered. It
+ <p>This callback will be called whenever a tracepoint is triggered. It
allows the tracer to decide whether a trace should be generated or not.
This check is made as early as possible in order to limit the amount of
overhead associated with tracing. If <c>trace</c> is returned the
@@ -132,7 +163,7 @@
to check if the tracer should still be active. It is called in multiple
scenarios, but most significantly it is used when tracing is started
using this tracer.</p>
- <p>This function may be called multiple times per trace point, so it
+ <p>This function may be called multiple times per tracepoint, so it
is important that it is both fast and side effect free.</p>
</desc>
</func>
@@ -143,17 +174,17 @@
<type>
<v>TraceTag = <seealso marker="#type-trace_tag">trace_tag()</seealso></v>
<v>TracerState = term()</v>
- <v>Tracee = <seealso marker="#type-trace_tag">tracee()</seealso></v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
<v>FirstTraceTerm = term()</v>
<v>SecondTraceTerm = term() | undefined</v>
<v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
<v>Result = ok</v>
</type>
<desc>
- <p>This callback will be called when a trace point is triggered and
+ <p>This callback will be called when a tracepoint is triggered and
the <seealso marker="#enabled">Module:enabled/3</seealso>
callback returned <c>trace</c>. In it any side effects needed by
- the tracer should be done. The trace point payload is located in
+ the tracer should be done. The tracepoint payload is located in
the <c>FirstTraceTerm</c> and <c>SecondTraceTerm</c>. The content
of the TraceTerms depends on which <c>TraceTag</c> has been triggered.
The <c>FirstTraceTerm</c> and <c>SecondTraceTerm</c> correspond to the
@@ -181,6 +212,319 @@
see the <seealso marker="kernel:seq_trace">seq_trace</seealso> manual.</p>
</desc>
</func>
+
+ <marker id="enabled_procs"></marker>
+ <func>
+ <name>Module:enabled_procs(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_procs">trace_tag_procs()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>procs</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_procs/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_procs"></marker>
+ <func>
+ <name>Module:trace_procs(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_procs">trace_tag()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_procs">Module:enabled_procs/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_procs/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="enabled_ports"></marker>
+ <func>
+ <name>Module:enabled_ports(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_ports">trace_tag_ports()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>ports</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_ports/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_ports"></marker>
+ <func>
+ <name>Module:trace_ports(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_ports">trace_tag()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_ports">Module:enabled_ports/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_ports/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="enabled_running_procs"></marker>
+ <func>
+ <name>Module:enabled_running_procs(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_running_procs">trace_tag_running_procs()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>running_procs | running</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_running_procs/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_running_procs"></marker>
+ <func>
+ <name>Module:trace_running_procs(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_running_procs">trace_tag_running_procs()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_running_procs">Module:enabled_running_procs/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_running_procs/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="enabled_running_ports"></marker>
+ <func>
+ <name>Module:enabled_running_ports(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_running_ports">trace_tag_running_ports()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>running_ports</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_running_ports/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_running_ports"></marker>
+ <func>
+ <name>Module:trace_running_ports(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_running_ports">trace_tag_running_ports()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_running_ports">Module:enabled_running_ports/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_running_ports/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="enabled_call"></marker>
+ <func>
+ <name>Module:enabled_call(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_call">trace_tag_call()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>call | return_to</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_call/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_call"></marker>
+ <func>
+ <name>Module:trace_call(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_call">trace_tag_call()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_call">Module:enabled_call/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_call/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="enabled_send"></marker>
+ <func>
+ <name>Module:enabled_send(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_send">trace_tag_send()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>send</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_send/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_send"></marker>
+ <func>
+ <name>Module:trace_send(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_send">trace_tag_send()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_send">Module:enabled_send/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_send/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="enabled_receive"></marker>
+ <func>
+ <name>Module:enabled_receive(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_receive">trace_tag_receive()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>'receive'</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_receive/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_receive"></marker>
+ <func>
+ <name>Module:trace_receive(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_receive">trace_tag_receive()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_receive">Module:enabled_receive/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_receive/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="enabled_garbage_collection"></marker>
+ <func>
+ <name>Module:enabled_garbage_collection(TraceTag, TracerState, Tracee) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_gc">trace_tag_gc()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>Result = trace | discard | remove</v>
+ </type>
+ <desc>
+ <p>This callback will be called whenever a tracepoint with trace flag
+ <seealso marker="erlang#trace-3"><c>garbage_collection</c></seealso>
+ is triggered.</p>
+ <p>If <c>enabled_garbage_collection/3</c> is not defined <c>enabled/3</c> will be called instead.</p>
+ </desc>
+ </func>
+
+ <marker id="trace_garbage_collection"></marker>
+ <func>
+ <name>Module:trace_garbage_collection(TraceTag, TracerState, Tracee, FirstTraceTerm, SecondTraceTerm, Opts) -> Result</name>
+ <fsummary>Check if a trace event should be generated.</fsummary>
+ <type>
+ <v>TraceTag = <seealso marker="#type-trace_tag_gc">trace_tag_gc()</seealso></v>
+ <v>TracerState = term()</v>
+ <v>Tracee = <seealso marker="#type-tracee">tracee()</seealso></v>
+ <v>FirstTraceTerm = term()</v>
+ <v>SecondTraceTerm = term() | undefined</v>
+ <v>Opts = <seealso marker="#type-trace_opts">trace_opts()</seealso></v>
+ <v>Result = ok</v>
+ </type>
+ <desc>
+ <p>This callback will be called when a tracepoint is triggered and
+ the <seealso marker="#enabled_garbage_collection">Module:enabled_garbage_collection/3</seealso>
+ callback returned <c>trace</c>.</p>
+ <p>If <c>trace_garbage_collection/6</c> is not defined <c>trace/6</c> will be called instead.</p>
+ </desc>
+ </func>
+
</funcs>
<section>
<marker id="example"></marker>
@@ -282,7 +626,7 @@ static ERL_NIF_TERM enabled(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
ErlNifPid to_pid;
if (enif_get_local_pid(env, argv[1], &amp;to_pid))
if (!enif_is_process_alive(env, &amp;to_pid))
- /* tracer is dead so we should remove this trace point */
+ /* tracer is dead so we should remove this tracepoint */
return enif_make_atom(env, "remove");
/* Only generate trace for when tracer != tracee */