Add a flag that makes Node.js print the stack trace at the
time of *throwing* uncaught exceptions, rather than at the
creation of the `Error` object, if there is any.
This is disabled by default because it affects GC behavior.
PR-URL: https://github.com/nodejs/node/pull/30025
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.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>
The C++ land `node::FatalException()` is not in fact fatal anymore.
It gives the user a chance to handle the uncaught exception
globally by listening to the `uncaughtException` event. This patch
renames it to `TriggerUncaughtException` in C++ to avoid the confusion.
In addition rename the JS land handler to `onGlobalUncaughtException`
to reflect its purpose - we have to keep the alias
`process._fatalException` and use that for now since it has been
monkey-patchable in the user land.
This patch also
- Adds more comments to the global uncaught exception handling routine
- Puts a few other C++ error handling functions into the `errors`
namespace
- Moves error-handling-related bindings to the `errors` binding.
Refs: 2b252acea4
PR-URL: https://github.com/nodejs/node/pull/28257
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Rename the per-isolate message listener to `PerIsolateMessageListener`
and move it to `node_errors.cc` since it's part of the error
handling process. It also creates an external reference so it needs
to be exposed in `node_errors.h` for a snapshot builder to know.
PR-URL: https://github.com/nodejs/node/pull/27304
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Previously when an uncaught JS error is thrown before Environment was
assigned to the context (e.g. a SyntaxError in a per-context script),
it triggered an infinite recursion:
1. The error message listener `node::OnMessage()` triggered
`node::FatalException()`
2. `node::FatalException()` attempted to get the Environment
assigned to the context entered using `Environment::GetCurrent()`
3. `Environment::GetCurrent()` previously incorrectly accepted
out-of-bound access with the length of the embedder data array
as index, and called `context->GetAlignedPointerFromEmbedderData()`
4. The out-of-bound access in `GetAlignedPointerFromEmbedderData()`
triggered a fatal error, which was handled by `node::FatalError()`
5. `node::FatalError()` called `Environment::GetCurrent()`, then
we went back to 3.
This patch fixes the incorrect guard in 3. When
`Environment::GetCurrent()` returns nullptr (when Environment is not
yet assigned to the context) in 2, it now prints the JS stack trace
and crashes directly.
PR-URL: https://github.com/nodejs/node/pull/27236
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
This adds a flag to define the default behavior for unhandled
rejections. Three modes exist: `none`, `warn` and `strict`. The first
is going to silence all unhandled rejection warnings. The second
behaves identical to the current default with the excetion that no
deprecation warning will be printed and the last is going to throw
an error for each unhandled rejection, just as regular exceptions do.
It is possible to intercept those with the `uncaughtException` hook
as with all other exceptions as well.
This PR has no influence on the existing `unhandledRejection` hook.
If that is used, it will continue to function as before.
PR-URL: https://github.com/nodejs/node/pull/26599
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Matheus Marchini <mat@mmarchini.me>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
- Lazy load `async_hooks` in the implementation
- Rename `process/next_tick.js` to `process/task_queues.js`
and move the implementation of `global.queueMicrotask()`
there since these methods are conceptually related to
each other.
- Move the bindings used by `global.queueMicrotask()` into
`node_task_queue.cc` instead of the generic `node_util.cc`
- Use `defineOperation` to define `global.queueMicrotask()`
PR-URL: https://github.com/nodejs/node/pull/26523
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
These checks were useful while investigating other issues;
using empty `Local<>`s can be very un-debuggable, because that
typically does not lead to assertions with debugging information
but rather crashes based on accessing invalid memory.
PR-URL: https://github.com/nodejs/node/pull/26125
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This patch moves most of the public C++ APIs into src/api/*.cc
so that it's easier to tell that we need to be careful about
the compatibility of these code.
Some APIs, like `node::LoadEnvironmet()`, `node::Start()` and
`node::Init()` still stay in `node.cc` because they are still
very specific to our use cases and do not work quite well yet
for embedders anyway - we could not even manage to write cctest for
them at the moment.
PR-URL: https://github.com/nodejs/node/pull/25541
Reviewed-By: Gus Caplan <me@gus.host>
For the report generation, we use `Environment::GetCurrent(isolate)`
which uses `isolate->GetCurrentContext()` under the hood, thus
allocates a handle. Without a `HandleScope`, this is invalid.
This might not strictly be allowed inside of `OnFatalError()`,
but it won’t make anything worse either.
PR-URL: https://github.com/nodejs/node/pull/25775
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Move `node::errno_string` into node_errors.h/cc and move it into
the `node:errors` namespace to reduce the size of the header.
It's not on any performance-critical code path so does not need
to be inlined.
PR-URL: https://github.com/nodejs/node/pull/25396
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
So that it's easier to tell whether we are manipulating per-process
global states that may need to be treated with care to avoid races.
Also added comments about these variables and moved some of them
to a more suitable compilation unit:
- Move `v8_initialized` to `util.h` since it's only used in
`util.cc` and `node.cc`
- Rename `process_mutex` to `tty_mutex` and move it into
`node_errors.cc` since that's the only place it's used
to guard the tty.
- Move `per_process_opts_mutex` and `per_process_opts`
into `node_options.h` and rename them to
`per_process::cli_options[_mutex]`
- Rename `node_isolate[_mutex]` to `per_process::main_isolate[_mutex]`
PR-URL: https://github.com/nodejs/node/pull/25302
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Move the following code into a new node_errors.cc file and
declare them in node_errors.h for clarity and make it possible
to include them with node_errors.h.
- AppendExceptionLine()
- DecorateErrorStack()
- FatalError()
- OnFatalError()
- PrintErrorString()
- FatalException()
- ReportException()
- FatalTryCatch
And move the following definitions (declared elsewhere than
node_errors.h) to node_errors.cc:
- Abort() (in util.h)
- Assert() (in util.h)
PR-URL: https://github.com/nodejs/node/pull/24058
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
