src: fix domains + --abort-on-uncaught-exception #922
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If run with --abort-on-uncaught-exception, V8 will abort the process whenever it does not see a JS-installed CatchClause in the stack. C++ TryCatch clauses are ignored. Domains work by setting a FatalException handler which is ignored when running in abort mode. This patch modifies MakeCallback to call its target function through a JS function that installs a CatchClause and manually calls _fatalException on error, if the process is both using domains and is in abort mode. Fixes: #836
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Closing this for a second while I work out some bugs. |
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Okay, I think this is in a better state now. |
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Looks great, no floating patch in v8 land and the code is straightforward. |
| if (has_abort_on_uncaught_and_domains) { | ||
| Local<Value> fn = process->Get(env()->domain_abort_uncaught_exc_string()); | ||
| if (fn->IsFunction()) { | ||
| Local<Array> specialContext = Array::New(env()->isolate(), 2); |
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Minor style nit: snake_case, not camelCase.
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LGTM with comments. V8 accepts mixed dashes and underscores in command line arguments while your patch accepts only one or the other but I don't think it matters much in practice. |
chrisdickinson
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Feb 25, 2015
If run with --abort-on-uncaught-exception, V8 will abort the process whenever it does not see a JS-installed CatchClause in the stack. C++ TryCatch clauses are ignored. Domains work by setting a FatalException handler which is ignored when running in abort mode. This patch modifies MakeCallback to call its target function through a JS function that installs a CatchClause and manually calls _fatalException on error, if the process is both using domains and is in abort mode. Semver: patch PR-URL: #922 Fixes: #836 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
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Merged in 0af4c9e. |
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@chrisdickinson could this be considered semver-minor? |
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Semver-patch. |
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@chrisdickinson You forgot to implement the same for |
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If run with --abort-on-uncaught-exception, V8 will abort the process whenever it does not see a JS-installed CatchClause in the stack. C++ TryCatch clauses are ignored. Domains work by setting a FatalException handler which is ignored when running in abort mode.
This patch modifies MakeCallback to call its target function through a JS function that installs a CatchClause and manually calls _fatalException on error, if the process is both using domains and is in abort mode.
Fixes: #836
Some notes on this:
I am not a fan of how I've got the
ParseArgsstuff working – specifically, theabort_on_uncaught_exc_hangs off of the Environment object (which seems correct) but is also stored globally in a static boolean in node.cc. This is mostly out of expedience, since the environment hasn't been created yet, but I want to preserve the initial value. This feels bad, I am open to suggestions on how to make that better.This does add the overhead of one branch to all
MakeCallbackcalls. I'm not sure if there's a way to get around this, though.Currently it does not respond to changes from
require('v8').setFlagsFromString. I wanted to get a read on the approach before complicating that code.R=@trevnorris + @bnoordhuis, /cc @geek