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script: Create a debugger script for the SpiderMonkey Debugger API (#38331)

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to use the [SpiderMonkey Debugger
API](https://firefox-source-docs.mozilla.org/js/Debugger/), we need to
call it from an internal debugger script that we will supply. this
script must run in the same runtime as the debuggee(s), but in a
separate
[compartment](https://udn.realityripple.com/docs/Mozilla/Projects/SpiderMonkey/Compartments)
([more
details](https://hacks.mozilla.org/2020/03/future-proofing-firefoxs-javascript-debugger-implementation/)).

this patch defines a new DebuggerGlobalScope type and a new debugger
script resource. when creating each script thread, we create a debugger
global, load the debugger script from resources/debugger.js, and run
that script in the global to initialise the Debugger API.

subsequent patches will use the debugger script as an RPC mechanism for
the Debugger API.

Testing: no testable effects yet, but will be used in #37667
Fixes: part of #36027

---------

Signed-off-by: Delan Azabani <dazabani@igalia.com>
Co-authored-by: atbrakhi <atbrakhi@igalia.com>
This commit is contained in:
shuppy 2025-07-31 14:17:23 +08:00 • committed by GitHub
parent 8e27fd48cc
commit c09e117bfe
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11 changed files with 184 additions and 6 deletions
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8
components/script/dom/globalscope.rs
View file

@ -114,7 +114,7 @@ use crate::dom::reportingobserver::ReportingObserver;
use crate::dom::serviceworker::ServiceWorker;
use crate::dom::serviceworkerregistration::ServiceWorkerRegistration;
use crate::dom::trustedtypepolicyfactory::TrustedTypePolicyFactory;
use crate::dom::types::MessageEvent;
use crate::dom::types::{DebuggerGlobalScope, MessageEvent};
use crate::dom::underlyingsourcecontainer::UnderlyingSourceType;
#[cfg(feature = "webgpu")]
use crate::dom::webgpu::gpudevice::GPUDevice;
@ -2530,6 +2530,9 @@ impl GlobalScope {
// https://drafts.css-houdini.org/worklets/#script-settings-for-worklets
return worklet.base_url();
}
if let Some(_debugger_global) = self.downcast::<DebuggerGlobalScope>() {
return self.creation_url.clone();
}
unreachable!();
}
@ -2545,6 +2548,9 @@ impl GlobalScope {
// TODO: is this the right URL to return?
return worklet.base_url();
}
if let Some(_debugger_global) = self.downcast::<DebuggerGlobalScope>() {
return self.creation_url.clone();
}
unreachable!();
}