script: Implement jsglue traps for saveJobQueue()#38232
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Signed-off-by: Delan Azabani <[email protected]> Co-authored-by: atbrakhi <[email protected]>
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hmm, clippy is busted in ci, but not locally? |
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I'd like to see the code with my suggestions addressed. My hope is that it will raise fewer eyebrows!
Co-authored-by: atbrakhi <[email protected]> Signed-off-by: Delan Azabani <[email protected]>
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@delan Clippy warnings are preventing merging. |
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in the [SpiderMonkey Debugger API](https://firefox-source-docs.mozilla.org/js/Debugger/), hooks like [onNewGlobalObject()](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.html#onnewglobalobject-global) use an AutoDebuggerJobQueueInterruption to [switch to a new microtask queue](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/mozjs/js/src/debugger/Debugger.cpp#L2834-L2841) and avoid clobbering the debuggee’s microtask queue. this in turn relies on JobQueue::saveJobQueue(), which is [not yet implemented in RustJobQueue](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/src/jsglue.cpp#L83-L86). this patch bumps mozjs to servo/mozjs#595, which implements [saveJobQueue() and SavedJobQueue](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/mozjs/js/public/Promise.h#L92-L114) for RustJobQueue by calling into Servo via two new JobQueueTraps that create and destroy extra “interrupt” queues for use by the debugger. SpiderMonkey [does not own external job queues](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/mozjs/js/public/Promise.h#L117-L123), so the lifetime of these queues is managed in Servo, where they are stored in a Vec-based stack. stack-like behaviour is adequate for SpiderMonkey’s save and restore patterns, as far as we can tell, but we’ve added an assertion just in case. Testing: manually tested working in devtools debugger patch (servo#37667), where it will undergo automated tests Fixes: servo#38311 --------- Signed-off-by: Delan Azabani <[email protected]> Co-authored-by: atbrakhi <[email protected]>
minghuaw
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in the [SpiderMonkey Debugger API](https://firefox-source-docs.mozilla.org/js/Debugger/), hooks like [onNewGlobalObject()](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.html#onnewglobalobject-global) use an AutoDebuggerJobQueueInterruption to [switch to a new microtask queue](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/mozjs/js/src/debugger/Debugger.cpp#L2834-L2841) and avoid clobbering the debuggee’s microtask queue. this in turn relies on JobQueue::saveJobQueue(), which is [not yet implemented in RustJobQueue](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/src/jsglue.cpp#L83-L86). this patch bumps mozjs to servo/mozjs#595, which implements [saveJobQueue() and SavedJobQueue](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/mozjs/js/public/Promise.h#L92-L114) for RustJobQueue by calling into Servo via two new JobQueueTraps that create and destroy extra “interrupt” queues for use by the debugger. SpiderMonkey [does not own external job queues](https://github.com/servo/mozjs/blob/b14aebff23ac4d5b0652060ef949334bda08b22f/mozjs-sys/mozjs/js/public/Promise.h#L117-L123), so the lifetime of these queues is managed in Servo, where they are stored in a Vec-based stack. stack-like behaviour is adequate for SpiderMonkey’s save and restore patterns, as far as we can tell, but we’ve added an assertion just in case. Testing: manually tested working in devtools debugger patch (servo#37667), where it will undergo automated tests Fixes: servo#38311 --------- Signed-off-by: Delan Azabani <[email protected]> Co-authored-by: atbrakhi <[email protected]>
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in the SpiderMonkey Debugger API, hooks like onNewGlobalObject() use an AutoDebuggerJobQueueInterruption to switch to a new microtask queue and avoid clobbering the debuggee’s microtask queue. this in turn relies on JobQueue::saveJobQueue(), which is not yet implemented in RustJobQueue.
this patch bumps mozjs to servo/mozjs#595, which implements saveJobQueue() and SavedJobQueue for RustJobQueue by calling into Servo via two new JobQueueTraps that create and destroy extra “interrupt” queues for use by the debugger.
SpiderMonkey does not own external job queues, so the lifetime of these queues is managed in Servo, where they are stored in a Vec-based stack. stack-like behaviour is adequate for SpiderMonkey’s save and restore patterns, as far as we can tell, but we’ve added an assertion just in case.
Testing: manually tested working in devtools debugger patch (#37667), where it will undergo automated tests
Fixes: #38311