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trace_events: add file pattern cli option
Allow the user to specify the filepath for the trace_events log file using a template string. Backport-PR-URL: #19145 PR-URL: #18480 Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,30 @@ | ||
'use strict'; | ||
const common = require('../common'); | ||
const tmpdir = require('../common/tmpdir'); | ||
const assert = require('assert'); | ||
const cp = require('child_process'); | ||
const fs = require('fs'); | ||
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tmpdir.refresh(); | ||
process.chdir(tmpdir.path); | ||
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const CODE = | ||
'setTimeout(() => { for (var i = 0; i < 100000; i++) { "test" + i } }, 1)'; | ||
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const proc = cp.spawn(process.execPath, [ | ||
'--trace-events-enabled', | ||
'--trace-event-file-pattern', | ||
// eslint-disable-next-line no-template-curly-in-string | ||
'${pid}-${rotation}-${pid}-${rotation}.tracing.log', | ||
'-e', CODE | ||
]); | ||
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proc.once('exit', common.mustCall(() => { | ||
const expectedFilename = `${proc.pid}-1-${proc.pid}-1.tracing.log`; | ||
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assert(common.fileExists(expectedFilename)); | ||
fs.readFile(expectedFilename, common.mustCall((err, data) => { | ||
const traces = JSON.parse(data.toString()).traceEvents; | ||
assert(traces.length > 0); | ||
})); | ||
})); |