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Bug 1959303 - Avoid calling MicroTaskRunnable::Suppressed if it can't return true, r=mccr8

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Differential Revision: https://phabricator.services.mozilla.com/D244848
This commit is contained in:
Olli Pettay
2025-04-10 01:08:37 +00:00
parent 4c0adc7d53
commit 4860c3877d
3 changed files with 13 additions and 1 deletions
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2
dom/base/Document.cpp
View File

@@ -17359,6 +17359,7 @@ nsAutoSyncOperation::nsAutoSyncOperation(Document* aDoc,
if (CycleCollectedJSContext* ccjs = CycleCollectedJSContext::Get()) {
mMicroTaskLevel = ccjs->MicroTaskLevel();
ccjs->SetMicroTaskLevel(0);
ccjs->EnterSyncOperation();
}
if (aDoc) {
mBrowsingContext = aDoc->GetBrowsingContext();
@@ -17398,6 +17399,7 @@ nsAutoSyncOperation::~nsAutoSyncOperation() {
CycleCollectedJSContext* ccjs = CycleCollectedJSContext::Get();
if (ccjs) {
ccjs->SetMicroTaskLevel(mMicroTaskLevel);
ccjs->LeaveSyncOperation();
}
if (mBrowsingContext &&
mSyncBehavior == SyncOperationBehavior::eSuspendInput &&

6
xpcom/base/CycleCollectedJSContext.cpp
View File

@@ -59,6 +59,7 @@ CycleCollectedJSContext::CycleCollectedJSContext()
mDoingStableStates(false),
mTargetedMicroTaskRecursionDepth(0),
mMicroTaskLevel(0),
mSyncOperations(0),
mSuppressionGeneration(0),
mDebuggerRecursionDepth(0),
mMicroTaskRecursionDepth(0),
@@ -783,7 +784,10 @@ bool CycleCollectedJSContext::PerformMicroTaskCheckPoint(bool aForce) {
break;
}
if (runnable->Suppressed()) {
// No need to check Suppressed if there aren't ongoing sync operations nor
// pending mSuppressedMicroTasks.
if ((IsInSyncOperation() || mSuppressedMicroTasks) &&
runnable->Suppressed()) {
// Microtasks in worker shall never be suppressed.
// Otherwise, mPendingMicroTaskRunnables will be replaced later with
// all suppressed tasks in mDebuggerMicroTaskQueue unexpectedly.

6
xpcom/base/CycleCollectedJSContext.h
View File

@@ -246,6 +246,10 @@ class CycleCollectedJSContext : dom::PerThreadAtomCache, private JS::JobQueue {
void SetMicroTaskLevel(uint32_t aLevel) { mMicroTaskLevel = aLevel; }
void EnterSyncOperation() { ++mSyncOperations; }
void LeaveSyncOperation() { --mSyncOperations; }
bool IsInSyncOperation() const { return mSyncOperations > 0; }
MOZ_CAN_RUN_SCRIPT
bool PerformMicroTaskCheckPoint(bool aForce = false);
@@ -339,6 +343,8 @@ class CycleCollectedJSContext : dom::PerThreadAtomCache, private JS::JobQueue {
uint32_t mMicroTaskLevel;
uint32_t mSyncOperations;
std::deque<RefPtr<MicroTaskRunnable>> mPendingMicroTaskRunnables;
std::deque<RefPtr<MicroTaskRunnable>> mDebuggerMicroTaskQueue;
RefPtr<SuppressedMicroTasks> mSuppressedMicroTasks;