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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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4
components/shared/embedder/resources.rs
View file

@ -109,6 +109,8 @@ pub enum Resource {
DirectoryListingHTML,
/// A HTML page that is used for the about:memory url.
AboutMemoryHTML,
/// RPC script for the Debugger API on behalf of devtools.
DebuggerJS,
}
impl Resource {
@ -123,6 +125,7 @@ impl Resource {
Resource::CrashHTML => "crash.html",
Resource::DirectoryListingHTML => "directory-listing.html",
Resource::AboutMemoryHTML => "about-memory.html",
Resource::DebuggerJS => "debugger.js",
}
}
}
@ -167,6 +170,7 @@ fn resources_for_tests() -> Box<dyn ResourceReaderMethods + Sync + Send> {
Resource::AboutMemoryHTML => {
&include_bytes!("../../../resources/about-memory.html")[..]
},
Resource::DebuggerJS => &include_bytes!("../../../resources/debugger.js")[..],
}
.to_owned()
}