src: add tracing category macros
Adds TRACING_CATEGORY_NODE
, TRACING_CATEGORY_NODE1
and
TRACING_CATEGORY_NODE2
helper macros for consistently building
trace event category strings. For instance,
TRACING_CATEGORY_NODE2(foo, bar)
would generate the category
string node,node.foo,node.foo.bar
, such that...
TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(
TRACING_CATEGORY_NODE2(foo, bar),
"baz", 1);
Would emit if trace events are enabled for categories: node
,
node.foo
, or node.foo.bar
.
This allows a natural scoping down of what trace events a user
may want to receive. Enabling the node
category would receive
everything Node.js produces.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines