Disenroll fix

parttimenerd · jbachorik · commit c8d598839a8b · 2025-02-02T11:58:26.000+01:00
diff --git a/src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp b/src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp
@@ -480,7 +480,7 @@ void JfrCPUTimeThreadSampler::enroll() {
 }
 
 void JfrCPUTimeThreadSampler::disenroll() {
-  if (Atomic::cmpxchg(&_disenrolled, false, true)) {
+  if (!Atomic::cmpxchg(&_disenrolled, false, true)) {
     log_info(jfr)("Disenrolling CPU thread sampler");
     stop_timer();
     Atomic::store(&_stop_signals, true);

Original file line number	Diff line number	Diff line change
`@@ -480,7 +480,7 @@ void JfrCPUTimeThreadSampler::enroll() {`
`480`	`480`	`}`
`481`	`481`
`482`	`482`	`void JfrCPUTimeThreadSampler::disenroll() {`
`483`		`- if (Atomic::cmpxchg(&_disenrolled, false, true)) {`
	`483`	`+ if (!Atomic::cmpxchg(&_disenrolled, false, true)) {`
`484`	`484`	`log_info(jfr)("Disenrolling CPU thread sampler");`
`485`	`485`	`stop_timer();`
`486`	`486`	`Atomic::store(&_stop_signals, true);`