Merge pull request #5182 from dswarbrick/fix-unaligned-atomic

Fix misaligned struct member used in atomic operation
aws · May 24, 2024 · 4861f8f · 4861f8f
2 parents b3e1d80 + a49c26d
commit 4861f8f
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diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
@@ -3,3 +3,5 @@
 ### SDK Enhancements
 
 ### SDK Bugs
+* Fix misaligned struct member used in atomic operation.
+  * This change fixes panics on 32-bit systems in services that use endpoint discovery.
diff --git a/aws/crr/cache.go b/aws/crr/cache.go
@@ -8,12 +8,12 @@ import (
 // based on some key. The datastructure makes use of a read write
 // mutex to enable asynchronous use.
 type EndpointCache struct {
-	endpoints     syncMap
-	endpointLimit int64
 	// size is used to count the number elements in the cache.
 	// The atomic package is used to ensure this size is accurate when
 	// using multiple goroutines.
-	size int64
+	size          int64
+	endpoints     syncMap
+	endpointLimit int64
 }
 
 // NewEndpointCache will return a newly initialized cache with a limit