Implement a special async_hooks listener that forwards information
about async tasks to V8Inspector asyncTask* API, thus enabling
DevTools feature "async stack traces".
The feature is enabled only on 64bit platforms due to a technical
limitation of V8 Inspector: inspector uses a pointer as a task id,
while async_hooks use 64bit numbers as ids.
To avoid performance penalty of async_hooks when not debugging,
the new listener is enabled only when the process enters a debug mode:
- When the process is started with `--inspect` or `--inspect-brk`,
the listener is enabled immediately and async stack traces
lead all the way to the first tick of the event loop.
- When the debug mode is enabled via SIGUSR1 or `_debugProcess()`,
the listener is enabled together with the debugger. As a result,
only async operations started after the signal was received
will be correctly observed and reported to V8 Inspector. For example,
a `setInterval()` called in the first tick of the event will not be
shown in the async stack trace when the callback is invoked. This
behaviour is consistent with Chrome DevTools.
Last but not least, this commit fixes handling of InspectorAgent's
internal property `enabled_` to ensure it's set back to `false`
after the debugger is deactivated (typically via `process._debugEnd()`).
Fixes: https://github.com/nodejs/node/issues/11370
PR-URL: https://github.com/nodejs/node/pull/13870
Reviewed-by: Timothy Gu <timothygu99@gmail.com>
Reviewed-by: Anna Henningsen <anna@addaleax.net>
Helper was rewritten to rely on promises instead of manually written
queue and callbacks. This simplifies the code and makes it easier to
maintain and extend.
PR-URL: https://github.com/nodejs/node/pull/14797
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Helper was rewritten to rely on promises instead of manually written
queue and callbacks. This simplifies the code and makes it easier to
maintain and extend.
PR-URL: https://github.com/nodejs/node/pull/14460
Reviewed-By: James M Snell <jasnell@gmail.com>
Fix a bug when messages bigger than 64kb where incorrectly parsed by
the inspector-helper.
PR-URL: https://github.com/nodejs/node/pull/14596
Fixes: https://github.com/nodejs/node/issues/14507
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
If JSON.parse() fails, print a message showing the JSON that failed to
parse. This is to help with debugging a current test failure on CI.
PR-URL: https://github.com/nodejs/node/pull/14508
Ref: https://github.com/nodejs/node/issues/14507
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
ESLint 4.x has stricter linting than previous versions. We are currently
using the legacy indentation rules in the test directory. This commit
changes the indentation of files to comply with the stricter 4.x linting
and enable stricter linting in the test directory.
PR-URL: https://github.com/nodejs/node/pull/14431
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
* Remove needless RegExp flag
In fixed case, `/g` flag is needless in the boolean context.
* Remove needless RegExp capturing
Use non-capturing grouping or remove capturing completely when:
* capturing is useless per se, e.g. in test() check;
* captured groups are not used afterward at all;
* some of the later captured groups are not used afterward.
* Use test, not match/exec in boolean context
match() and exec() return a complicated object,
unneeded in a boolean context.
* Do not needlessly repeat RegExp creation
This commit takes RegExp creation out of cycles and other repetitions.
As long as the RegExp does not use /g flag and match indices,
we are safe here.
In tests, this fix hardly gives a significant performance gain,
but it increases clarity and maintainability,
reassuring some RegExps to be identical.
RegExp in functions are not taken out of their functions:
while these functions are called many times
and their RegExps are recreated with each call,
the performance gain in test cases
does not seem to be worth decreasing function self-dependency.
PR-URL: https://github.com/nodejs/node/pull/13770
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
This change allows reentering the message dispatch loop when the Node is
paused. This is necessary when the pause happened as a result of the
message sent by a debug frontend, such as evaluating a function with a
breakpoint inside.
Fixes: https://github.com/nodejs/node/issues/13320
PR-URL: https://github.com/nodejs/node/pull/13350
Reviewed-By: James M Snell <jasnell@gmail.com>
* Removes "experimental" warning.
* Prints ws://_ip_:_port_:/_uuid_ for all IDs.
* Refers to nodejs.org guide for more details.
PR-URL: https://github.com/nodejs/node/pull/11207
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <mhdawson@ibm.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Replace function expressions with function declarations in preparation
for a lint rule requiring function declarations.
PR-URL: https://github.com/nodejs/node/pull/12711
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
common.fail() was added to paste over issues with assert.fail() function
signature. assert.fail() has been updated to accept a single argument so
common.fail() is no longer necessary.
PR-URL: https://github.com/nodejs/node/pull/12293
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
`node debug` is now an alias of `node inspect`. This is intended to be
a minimal change – it does not get rid of the the debugger code. That
can be done in a follow-on.
PR-URL: https://github.com/nodejs/node/pull/11441
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: joshgav - Josh Gavant <josh.gavant@outlook.com>
Reviewed-By: cjihrig - Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>
Currently Inspector posts a V8 "task" when a message is incoming. To
make sure messages are processed even when no JS is executed (e.g. while
waiting for I/O or timer), inspector will now post a libuv request.
Fixes: https://github.com/nodejs/node/issues/11589
PR-URL: https://github.com/nodejs/node/pull/11617
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
This commit adds a mustNotCall() helper for testing. This provides
an alternative to using common.fail() as a callback, or creating
a callback function for the sole purpose of calling common.fail().
PR-URL: https://github.com/nodejs/node/pull/11152
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Manually fix issues that eslint --fix couldn't do automatically.
PR-URL: https://github.com/nodejs/node/pull/10685
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
add an --inspect-brk option which breaks on
first line of user script. same behavior as old
--debug-brk flag.
PR-URL: https://github.com/nodejs/node/pull/8979
Reviewed-By: Eugene Ostroukhov <eostroukhov@chromium.org>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@keybase.io>
There are two instances of `setTimeout()` called without a duration in
`inspector-helper.js`. Change to `setImmediate()` for clarity that it
isn't a mistake.
PR-URL: https://github.com/nodejs/node/pull/9499
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Prince John Wesley <princejohnwesley@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Fix a nullptr dereference when an invalid path is requested.
Regression introduced in commit 69fc85d ("inspector: generate UUID for
debug targets"), caught by Coverity.
PR-URL: https://github.com/nodejs/node/pull/9184
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
By convention, inspector protocol targets do not advertise connection
URLs when the frontend is already connected as multiple inspector
protocol connections are not supported.
PR-URL: https://github.com/nodejs/node/pull/8919
Reviewed-By: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/8748
This test executes a simple debug session over the inspector protocol.
PR-URL: https://github.com/nodejs/node/pull/8429
Reviewed-By: ofrobots - Ali Ijaz Sheikh <ofrobots@google.com>
Miroslav Bajtoš
Timothy Gu
Eugene Ostroukhov
Anna Henningsen
Bartosz Sosnowski
Rich Trott
笑斌
Sebastiaan Deckers
Vse Mozhet Byt
Refael Ackermann
Josh Gavant
Ali Ijaz Sheikh
cjihrig
Gibson Fahnestock
Ben Noordhuis
Teddy Katz