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devtools: Create source actors from Debugger API notifications (#38334)

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currently our devtools impl creates source actors in script, when
executing scripts in HTMLScriptElement or DedicatedWorkerGlobalScope.
this approach is cumbersome, and it means that many pathways to running
scripts are missed, such as imported ES modules.

with the [SpiderMonkey Debugger
API](https://firefox-source-docs.mozilla.org/js/Debugger/), we can pick
up all of the scripts and all of their sources without any extra code,
as long as we tell it about every global we create (#38333, #38551).
this patch adds a [Debugger#onNewScript()
hook](https://firefox-source-docs.mozilla.org/js/Debugger/Debugger.html#onnewscript-script-global)
to the debugger script, which calls
DebuggerGlobalScope#notifyNewSource() to notify our script system when a
new script runs. if the source is relevant to the file tree in the
Sources tab, script tells devtools to create a source actor.

Testing: adds several new automated devtools tests
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 2025-08-11 14:04:51 +08:00 • committed by GitHub
parent de73d4a25c
commit 4784668fa9
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10 changed files with 522 additions and 118 deletions
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31
resources/debugger.js
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@ -6,24 +6,21 @@ const dbg = new Debugger;
const debuggeesToPipelineIds = new Map;
const debuggeesToWorkerIds = new Map;
dbg.onNewGlobalObject = function(global) {
dbg.uncaughtExceptionHook = function(error) {
console.error(`[debugger] Uncaught exception at ${error.fileName}:${error.lineNumber}:${error.columnNumber}: ${error.name}: ${error.message}`);
};
dbg.onNewScript = function(script, /* undefined; seems to be `script.global` now */ global) {
try {
// TODO: notify script system about new source
/* notifyNewSource */({
pipelineId: debuggeesToPipelineIds.get(script.global),
workerId: debuggeesToWorkerIds.get(script.global),
spidermonkeyId: script.source.id,
url: script.source.url,
urlOverride: script.source.displayURL,
text: script.source.text,
introductionType: script.source.introductionType ?? null,
});
} catch (error) {
logError(error);
}
// TODO: handle wasm (`script.source.introductionType == wasm`)
notifyNewSource({
pipelineId: debuggeesToPipelineIds.get(script.global),
workerId: debuggeesToWorkerIds.get(script.global),
spidermonkeyId: script.source.id,
url: script.source.url,
urlOverride: script.source.displayURL,
text: script.source.text,
introductionType: script.source.introductionType ?? null,
});
};
addEventListener("addDebuggee", event => {
@ -36,7 +33,3 @@ addEventListener("addDebuggee", event => {
});
debuggeesToWorkerIds.set(debuggerObject, workerId);
});
function logError(error) {
console.log(`[debugger] ERROR at ${error.fileName}:${error.lineNumber}:${error.columnNumber}: ${error.name}: ${error.message}`);
}