Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

lib,src: exit process on unhandled promise rejection cleanup #12010

Closed
wants to merge 7 commits into from
+462 −274
Closed

lib,src: exit process on unhandled promise rejection cleanup #12010

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
1f9635d
lib,src: throw on unhanded promise rejections
Fishrock123 Apr 25, 2016
7bc6369
src: use std::map for the promise reject map
Fishrock123 Feb 10, 2017
96967cd
wip move to unordered_map
Fishrock123 Feb 21, 2017
b4b2441
WIP
addaleax Feb 28, 2017
5d149bd
add promise rejection index so as to always reject the oldest one
addaleax Mar 1, 2017
f43c397
[Squash] fix lint, remove debug, cleanup
Fishrock123 Mar 23, 2017
2ed6fcc
[Squash] fix rebase issues
Fishrock123 Apr 28, 2017
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
217 changes: 0 additions & 217 deletions deps/npm/node_modules/request/node_modules/form-data/Readme.md
View file
Open in desktop

This file was deleted.

4 changes: 2 additions & 2 deletions lib/internal/bootstrap_node.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -304,13 +304,13 @@

function setupProcessFatal() {

process._fatalException = function(er) {
process._fatalException = function(er, fromPromise) {
var caught;

if (process.domain && process.domain._errorHandler)
caught = process.domain._errorHandler(er) || caught;

if (!caught)
if (!caught && !fromPromise)
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

What’s the reasoning for this? That it’s already made visible by process.on('unhandledRejection')?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@addaleax Yes. That and to make sure we don't emit an event from GC that is able to be recovered from.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@Fishrock123 oooh, that’s a good point – we should not be calling into the runtime from the GC at all

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@addaleax Mmmm, not quite though. This still calls process.on('exit'), which seems to be ok and makes logical sense.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@Fishrock123 We have definitely received bug reports of real-world V8 crashes because we tried to run JS code during GC, see b49b496 and its Fixes: tags

caught = process.emit('uncaughtException', er);

// If someone handled it, then great. otherwise, die in C++ land
Expand Down
52 changes: 8 additions & 44 deletions lib/internal/process/promises.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,88 +2,52 @@

const promiseRejectEvent = process._promiseRejectEvent;
const hasBeenNotifiedProperty = new WeakMap();
const promiseToGuidProperty = new WeakMap();
const pendingUnhandledRejections = [];
let lastPromiseId = 1;

exports.setup = setupPromises;

function getAsynchronousRejectionWarningObject(uid) {
return new Error('Promise rejection was handled ' +
`asynchronously (rejection id: ${uid})`);
}

function setupPromises(scheduleMicrotasks) {
const promiseInternals = {};

process._setupPromises(function(event, promise, reason) {
if (event === promiseRejectEvent.unhandled)
unhandledRejection(promise, reason);
else if (event === promiseRejectEvent.handled)
rejectionHandled(promise);
else
require('assert').fail(null, null, 'unexpected PromiseRejectEvent');
});
}, function getPromiseReason(data) {
return data[data.indexOf('[[PromiseValue]]') + 1];
}, promiseInternals);

function unhandledRejection(promise, reason) {
hasBeenNotifiedProperty.set(promise, false);
promiseToGuidProperty.set(promise, lastPromiseId++);
addPendingUnhandledRejection(promise, reason);
}

function rejectionHandled(promise) {
const hasBeenNotified = hasBeenNotifiedProperty.get(promise);
if (hasBeenNotified !== undefined) {
hasBeenNotifiedProperty.delete(promise);
const uid = promiseToGuidProperty.get(promise);
promiseToGuidProperty.delete(promise);
if (hasBeenNotified === true) {
let warning = null;
if (!process.listenerCount('rejectionHandled')) {
// Generate the warning object early to get a good stack trace.
warning = getAsynchronousRejectionWarningObject(uid);
}
promiseInternals.untrackPromise(promise);
process.nextTick(function() {
if (!process.emit('rejectionHandled', promise)) {
if (warning === null)
warning = getAsynchronousRejectionWarningObject(uid);
warning.name = 'PromiseRejectionHandledWarning';
warning.id = uid;
process.emitWarning(warning);
}
process.emit('rejectionHandled', promise);
});
}

}
}

function emitWarning(uid, reason) {
const warning = new Error('Unhandled promise rejection ' +
`(rejection id: ${uid}): ${reason}`);
warning.name = 'UnhandledPromiseRejectionWarning';
warning.id = uid;
if (reason instanceof Error) {
warning.stack = reason.stack;
}
process.emitWarning(warning);
if (!deprecationWarned) {
deprecationWarned = true;
process.emitWarning(
'Unhandled promise rejections are deprecated. In the future, ' +
'promise rejections that are not handled will terminate the ' +
'Node.js process with a non-zero exit code.',
'DeprecationWarning', 'DEP0018');
}
}
var deprecationWarned = false;
function emitPendingUnhandledRejections() {
let hadListeners = false;
while (pendingUnhandledRejections.length > 0) {
const promise = pendingUnhandledRejections.shift();
const reason = pendingUnhandledRejections.shift();
if (hasBeenNotifiedProperty.get(promise) === false) {
hasBeenNotifiedProperty.set(promise, true);
const uid = promiseToGuidProperty.get(promise);
if (!process.emit('unhandledRejection', reason, promise)) {
emitWarning(uid, reason);
promiseInternals.trackPromise(promise);
} else {
hadListeners = true;
}
Expand Down
4 changes: 4 additions & 0 deletions node.gyp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -196,6 +196,7 @@
'src/stream_wrap.cc',
'src/tcp_wrap.cc',
'src/timer_wrap.cc',
'src/track-promise.cc',
'src/tracing/agent.cc',
'src/tracing/node_trace_buffer.cc',
'src/tracing/node_trace_writer.cc',
Expand Down Expand Up @@ -230,6 +231,8 @@
'src/node_revert.h',
'src/node_i18n.h',
'src/pipe_wrap.h',
'src/track-promise.h',
'src/track-promise-inl.h',
'src/tty_wrap.h',
'src/tcp_wrap.h',
'src/udp_wrap.h',
Expand Down Expand Up @@ -623,6 +626,7 @@
'<(OBJ_TRACING_PATH)/node_trace_buffer.<(OBJ_SUFFIX)',
'<(OBJ_TRACING_PATH)/node_trace_writer.<(OBJ_SUFFIX)',
'<(OBJ_TRACING_PATH)/trace_event.<(OBJ_SUFFIX)',
'<(OBJ_PATH)/track-promise.<(OBJ_SUFFIX)',
],

'defines': [
Expand Down
3 changes: 2 additions & 1 deletion src/env-inl.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -185,7 +185,8 @@ inline Environment* Environment::GetCurrent(

inline Environment::Environment(IsolateData* isolate_data,
v8::Local<v8::Context> context)
: isolate_(context->GetIsolate()),
: promise_tracker_(this),
isolate_(context->GetIsolate()),
isolate_data_(isolate_data),
timer_base_(uv_now(isolate_data->event_loop())),
using_domains_(false),
Expand Down
Loading