Fix possible crash in _dispatch_wait_for_enqueuer on Android armeabi-v7a

triplef · triplef · commit 6ffcc3a4b803 · 2021-12-10T11:28:22.000+01:00
https://bugs.swift.org/browse/SR-15166
diff --git a/src/shims/yield.c b/src/shims/yield.c
@@ -44,7 +44,7 @@ _dispatch_wait_for_enqueuer(void **ptr)
 			__builtin_arm_clrex();
 			return value;
 		}
-		__builtin_arm_wfe();
+		dispatch_hardware_pause();
 	}
 #else
 	int spins = DISPATCH_WAIT_SPINS;

Original file line number	Diff line number	Diff line change
`@@ -44,7 +44,7 @@ _dispatch_wait_for_enqueuer(void **ptr)`
`44`	`44`	`__builtin_arm_clrex();`
`45`	`45`	`return value;`
`46`	`46`	`}`
`47`		`- __builtin_arm_wfe();`
	`47`	`+ dispatch_hardware_pause();`
`48`	`48`	`}`
`49`	`49`	`#else`
`50`	`50`	`int spins = DISPATCH_WAIT_SPINS;`