From 9c82a1e7ba8d5ce7e743f99348cf992965594f0a Mon Sep 17 00:00:00 2001
From: James M Snell <jasnell@gmail.com>
Date: Tue, 16 Oct 2018 13:57:24 -0700
Subject: console: add trace-events for time and count

Add the `node.console` trace event category to capture
`console.count()`, `console.countReset()`, `console.time()`,
`console.timeLog()`, and `console.timeEnd()` to the trace
event log.

PR-URL: https://github.com/nodejs/node/pull/23703
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
---
 lib/console.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'lib/console.js')

diff --git a/lib/console.js b/lib/console.js
index c254a3889b..96bd185585 100644
--- a/lib/console.js
+++ b/lib/console.js
@@ -21,6 +21,7 @@
 
 'use strict';
 
+const { trace } = internalBinding('trace_events');
 const {
   isStackOverflowError,
   codes: {
@@ -37,6 +38,12 @@ const {
 } = util.types;
 const kCounts = Symbol('counts');
 
+const kTraceConsoleCategory = 'node,node.console';
+const kTraceCount = 'C'.charCodeAt(0);
+const kTraceBegin = 'b'.charCodeAt(0);
+const kTraceEnd = 'e'.charCodeAt(0);
+const kTraceInstant = 'n'.charCodeAt(0);
+
 const {
   keys: ObjectKeys,
   values: ObjectValues,
@@ -232,6 +239,7 @@ Console.prototype.time = function time(label = 'default') {
     process.emitWarning(`Label '${label}' already exists for console.time()`);
     return;
   }
+  trace(kTraceBegin, kTraceConsoleCategory, `time::${label}`, 0);
   this._times.set(label, process.hrtime());
 };
 
@@ -239,6 +247,7 @@ Console.prototype.timeEnd = function timeEnd(label = 'default') {
   // Coerces everything other than Symbol to a string
   label = `${label}`;
   const hasWarned = timeLogImpl(this, 'timeEnd', label);
+  trace(kTraceEnd, kTraceConsoleCategory, `time::${label}`, 0);
   if (!hasWarned) {
     this._times.delete(label);
   }
@@ -248,6 +257,7 @@ Console.prototype.timeLog = function timeLog(label, ...data) {
   // Coerces everything other than Symbol to a string
   label = `${label}`;
   timeLogImpl(this, 'timeLog', label, data);
+  trace(kTraceInstant, kTraceConsoleCategory, `time::${label}`, 0);
 };
 
 // Returns true if label was not found
@@ -308,6 +318,7 @@ Console.prototype.count = function count(label = 'default') {
   else
     count++;
   counts.set(label, count);
+  trace(kTraceCount, kTraceConsoleCategory, `count::${label}`, 0, count);
   this.log(`${label}: ${count}`);
 };
 
@@ -318,7 +329,7 @@ Console.prototype.countReset = function countReset(label = 'default') {
     process.emitWarning(`Count for '${label}' does not exist`);
     return;
   }
-
+  trace(kTraceCount, kTraceConsoleCategory, `count::${label}`, 0, 0);
   counts.delete(`${label}`);
 };
 
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