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test/hotspot/jtreg/vmTestbase/nsk/jdi/ThreadReference/forceEarlyReturn/forceEarlyReturn004/libforceEarlyReturn004a.cpp
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -24,29 +24,22 @@
#include "jni.h"
extern "C" {
-int always_true = 1;
-
JNIEXPORT jint JNICALL
Java_nsk_jdi_ThreadReference_forceEarlyReturn_forceEarlyReturn004_forceEarlyReturn004a_nativeMethod(JNIEnv *env, jobject classObject, jobject object)
{
- int dummy_counter = 0;
+ static volatile int dummy_counter = 0;
// notify another thread that thread in native method
jclass klass = env->GetObjectClass(object);
jfieldID field = env->GetFieldID(klass, "threadInNative", "Z");
env->SetBooleanField(object, field, 1);
// execute infinite loop to be sure that thread in native method
- while (always_true)
- {
- // Need some dummy code so the optimizer does not remove this loop.
- dummy_counter = dummy_counter < 1000 ? 0 : dummy_counter + 1;
- }
- // The optimizer can be surprisingly clever.
- // Use dummy_counter so it can never be optimized out.
- // This statement will always return 0.
- return dummy_counter >= 0 ? 0 : 1;
+ while (dummy_counter == 0) {}
+
+ // Should not reach here
+ return 0;
}
}
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