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8249627: Degrade Thread.suspend and Thread.resume

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Reviewed-by: cjplummer, sspitsyn, dholmes, jpai
This commit is contained in:
Alan Bateman 2022-09-27 11:43:59 +00:00
parent bc12e9553d
commit 1abf971b93
15 changed files with 113 additions and 232 deletions
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23
src/hotspot/share/prims/jvm.cpp
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@ -3026,29 +3026,6 @@ JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
JVM_END
JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
ThreadsListHandle tlh(thread);
JavaThread* receiver = NULL;
bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
if (is_alive) {
// jthread refers to a live JavaThread, but java_suspend() will
// detect a thread that has started to exit and will ignore it.
receiver->java_suspend();
}
JVM_END
JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
ThreadsListHandle tlh(thread);
JavaThread* receiver = NULL;
bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
if (is_alive) {
// jthread refers to a live JavaThread.
receiver->java_resume();
}
JVM_END
JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
ThreadsListHandle tlh(thread);
oop java_thread = NULL;