tor-browser

commit bfc41c41a0ff386707354dc6cc467b9699373349
parent 42620de69c1c68282f9dd5cdb7c08fe11e41a7f9
Author: Florian Quèze <florian@queze.net>
Date:   Thu,  2 Oct 2025 19:28:47 +0000

Bug 1991018 - use exponential backoff for sleeps in OpenDatabaseAndHandleBusy, r=dom-storage-reviewers,janv,asuth,hsingh.

Differential Revision: https://phabricator.services.mozilla.com/D266296

Diffstat:
M
dom/indexedDB/ActorsParent.cpp
 | 
9
++++++++-

1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/dom/indexedDB/ActorsParent.cpp b/dom/indexedDB/ActorsParent.cpp
@@ -785,8 +785,15 @@ OpenDatabaseAndHandleBusy(mozIStorageService& aStorageService,
     // that to complete.
     const TimeStamp start = TimeStamp::NowLoRes();
 
+    // Use exponential backoff: start at 1ms, double up to 100ms max
+    uint32_t sleepMs = 1;
+    constexpr uint32_t kMaxSleepMs = 100;
+
     do {
-      PR_Sleep(PR_MillisecondsToInterval(100));
+      PR_Sleep(PR_MillisecondsToInterval(sleepMs));
+
+      // Exponential backoff with cap
+      sleepMs = std::min(sleepMs * 2, kMaxSleepMs);
 
       QM_TRY_UNWRAP(connection,
                     QM_OR_ELSE_WARN_IF(