Installing an error listener has a side effect that emitted errors are
considered as handled. This is quite bad for monitoring/logging tools
which tend to be interested in errors but don't want to cause side
effects like swallow an exception.
There are some workarounds in the wild like monkey patching emit or
remit the error if monitoring tool detects that it is the only listener
but this is error prone and risky.
This PR allows to install a listener to monitor errors with the side
effect to consume the error. To avoid conflicts with other events it
exports a symbol on EventEmitter which owns this special meaning.
Refs: https://github.com/open-telemetry/opentelemetry-js/issues/225
PR-URL: https://github.com/nodejs/node/pull/30932
Refs: https://github.com/open-telemetry/opentelemetry-js/issues/225
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/30635
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Store all primordials as properties of the primordials object.
Static functions are prefixed by the constructor's name and prototype
methods are prefixed by the constructor's name followed by "Prototype".
For example: primordials.Object.keys becomes primordials.ObjectKeys.
PR-URL: https://github.com/nodejs/node/pull/30610
Refs: https://github.com/nodejs/node/issues/29766
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
This restore some performance we lost when we introduced primordialias.
Improvements are up to +100%.
PR-URL: https://github.com/nodejs/node/pull/29633
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
For unhandled `'error'` events, include the constructor name for
subclasses of EventEmitter, if possible. This makes tracing errors
easier when both creation of the `Error` object and emitting it
happen in code that does not refer back to the event emitter.
PR-URL: https://github.com/nodejs/node/pull/28952
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Previously the enhancement were done right after emitting
`'uncaughtException'`, which meant by the time we knew the
exception was fatal in C++, the error.stack had already been
patched.
This patch moves those routines to be called later during the
fatal exception handling, and split them into two stages:
before and after the inspector is notified by the invocation of
`V8Inspector::exceptionThrown`. We now expand the stack to include
additional informations about unhandled 'error' events before
the inspector is notified, but delay the highlighting of the
frames until after the inspector is notified, so that the
ANSI escape sequences won't show up in the inspector console.
PR-URL: https://github.com/nodejs/node/pull/28308
Fixes: https://github.com/nodejs/node/issues/28287
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
This adds the constructor name of the event target to the emitted
warning. Right now it's difficult to identify where the leak is
actually coming from and having some further information about the
source will likely help to identify the source.
PR-URL: https://github.com/nodejs/node/pull/27694
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Use the "no-restricted-globals" ESLint rule to lint for it.
PR-URL: https://github.com/nodejs/node/pull/27027
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
This adds a custom eslint rule to verify that
`Error.captureStackTrace()` is only called if necessary. In most
cases the helper function should be used instead.
PR-URL: https://github.com/nodejs/node/pull/26738
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Since `internal/errors` is loaded by many builtin modules and is
currently the first module loaded during bootstrap, it is
fine to load it eagerly. We just need to make sure
that `internal/errors` itself load other modules lazily.
PR-URL: https://github.com/nodejs/node/pull/26771
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
This change adds a EventEmitter.once() method that wraps ee.once in a
promise.
Co-authored-by: David Mark Clements <david.mark.clements@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/26078
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
This updates a lot of comments.
PR-URL: https://github.com/nodejs/node/pull/26223
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Just remove '$' because this isn't a programming language like Python.
PR-URL: https://github.com/nodejs/node/pull/25590
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
If there is no handler for `.emit('error', value)` and `value`
is not an `Error` object, we currently just call `.toString()`
on it.
Almost always, using `util.inspect()` provides better information
for diagnostic purposes, so prefer to use that instead.
Refs: https://github.com/nodejs/help/issues/1729
PR-URL: https://github.com/nodejs/node/pull/25621
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matheus Marchini <mat@mmarchini.me>
This simplifies the `longestSeqContainedIn()` logic by checking for
the first identical occurance of at least three frames instead of
the longest one.
It also removes an unused argument.
PR-URL: https://github.com/nodejs/node/pull/24744
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Instead of always checking whether we've already warned about a
possible EventEmitter memory leak, first run the rest of the
code as accessing random properties on an Array is expensive.
In addition, remove an unnecessary truthy check.
PR-URL: https://github.com/nodejs/node/pull/20452
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
This makes a effort to make sure all of these errors will actually
also show the received input.
On top of that it refactors a few tests for better maintainability.
It will also change the returned type to always be a simple typeof
instead of special handling null.
PR-URL: https://github.com/nodejs/node/pull/19445
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
This adds a rule that forbids the use of native Error constructors in
the `lib` directory. This is to encourage use of the `internal/errors`
mechanism. The rule is disabled for errors that are not created with
the `internal/errors` module but are still assigned an error code.
PR-URL: https://github.com/nodejs/node/pull/19373
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
This is a first batch of updates that touches non-underscored modules in
lib.
PR-URL: https://github.com/nodejs/node/pull/19034
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Show the stack trace for the `eventemitter.emit('error')` call
in the case of an uncaught exception.
Previously, there would be no clue in Node’s output about where
the actual `throw` comes from.
PR-URL: https://github.com/nodejs/node/pull/19003
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Number.isNaN is now as fast as `val !== val`. Switch to the more
readable version. Also switch all `isNaN` to `Number.isNaN`.
PR-URL: https://github.com/nodejs/node/pull/18744
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
There two similar error codes in lib: "ERR_VALUE_OUT_OF_RANGE"
and "ERR_OUT_OF_RANGE". This change is to reduce them into
"ERR_VALUE_OUT_OF_RANGE"
Fixes: https://github.com/nodejs/node/issues/17603
PR-URL: https://github.com/nodejs/node/pull/17648
Fixes: https://github.com/nodejs/node/issues/17603
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Refactor lib & src code to eliminate all deep reaches into the
internal _events dictionary object, instead use available APIs
and add an extra method to EventEmitter: rawListeners.
PR-URL: https://github.com/nodejs/node/pull/17440
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Instead of callback bound apply, instead use the standard
Reflect.apply. This is both safer and appears to offer
a slight performance benefit.
PR-URL: https://github.com/nodejs/node/pull/17456
Refs: https://github.com/nodejs/node/issues/12956
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
With improvements in V8, using separate emit functions is no longer
necessary and can instead be replaced by the spread operator.
improvement confidence p.value
events/ee-emit.js n=2000000 2.98 % 0.09852489
events/ee-emit-2-args.js n=2000000 4.19 % *** 0.0001914216
events/ee-emit-6-args.js n=2000000 61.69 % *** 6.611964e-35
events/ee-emit-diff-args.js n=2000000 -0.36 % 0.305069
events/ee-once.js n=20000000 6.42 % *** 1.27831e-06
PR-URL: https://github.com/nodejs/node/pull/16869
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Bryan English <bryan@bryanenglish.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Benedikt Meurer <benedikt.meurer@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
The initials of expected in TypeError[ERR_INVALID_ARG_TYPE]
are inconsistent. This change is to unify them.
PR-URL: https://github.com/nodejs/node/pull/16401
Fixes: https://github.com/nodejs/node/issues/16383
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
