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8258837: Remove JVM option DisableStartThread

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Reviewed-by: kbarrett, dcubed
This commit is contained in:
Harold Seigel 2020-12-23 14:45:13 +00:00
parent a4e082e985
commit 244573509d
2 changed files with 10 additions and 18 deletions
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6
src/hotspot/share/runtime/globals.hpp
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@ -697,10 +697,6 @@ const intx ObjectAlignmentInBytes = 8;
product(bool, ClassUnloadingWithConcurrentMark, true, \ product(bool, ClassUnloadingWithConcurrentMark, true, \
"Do unloading of classes with a concurrent marking cycle") \ "Do unloading of classes with a concurrent marking cycle") \
\ \
develop(bool, DisableStartThread, false, \
"Disable starting of additional Java threads " \
"(for debugging only)") \
\
develop(bool, MemProfiling, false, \ develop(bool, MemProfiling, false, \
"Write memory usage profiling to log file") \ "Write memory usage profiling to log file") \
\ \
@ -2079,7 +2075,7 @@ const intx ObjectAlignmentInBytes = 8;
constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \ constraint(InitArrayShortSizeConstraintFunc, AfterErgo) \
\ \
product(ccstr, AllocateHeapAt, NULL, \ product(ccstr, AllocateHeapAt, NULL, \
"Path to the directoy where a temporary file will be created " \ "Path to the directory where a temporary file will be created " \
"to use as the backing store for Java Heap.") \ "to use as the backing store for Java Heap.") \
\ \
develop(int, VerifyMetaspaceInterval, DEBUG_ONLY(500) NOT_DEBUG(0), \ develop(int, VerifyMetaspaceInterval, DEBUG_ONLY(500) NOT_DEBUG(0), \

4
src/hotspot/share/runtime/thread.cpp
View file

@ -495,7 +495,6 @@ void Thread::set_priority(Thread* thread, ThreadPriority priority) {
void Thread::start(Thread* thread) { void Thread::start(Thread* thread) {
// Start is different from resume in that its safety is guaranteed by context or // Start is different from resume in that its safety is guaranteed by context or
// being called from a Java method synchronized on the Thread object. // being called from a Java method synchronized on the Thread object.
if (!DisableStartThread) {
if (thread->is_Java_thread()) { if (thread->is_Java_thread()) {
// Initialize the thread state to RUNNABLE before starting this thread. // Initialize the thread state to RUNNABLE before starting this thread.
// Can not set it after the thread started because we do not know the // Can not set it after the thread started because we do not know the
@ -506,7 +505,6 @@ void Thread::start(Thread* thread) {
} }
os::start_thread(thread); os::start_thread(thread);
} }
}
class InstallAsyncExceptionClosure : public HandshakeClosure { class InstallAsyncExceptionClosure : public HandshakeClosure {
Handle _throwable; // The Throwable thrown at the target Thread Handle _throwable; // The Throwable thrown at the target Thread
@ -1230,11 +1228,9 @@ WatcherThread::WatcherThread() : NonJavaThread() {
// If the VMThread's priority is not lower than the WatcherThread profiling // If the VMThread's priority is not lower than the WatcherThread profiling
// will be inaccurate. // will be inaccurate.
os::set_priority(this, MaxPriority); os::set_priority(this, MaxPriority);
if (!DisableStartThread) {
os::start_thread(this); os::start_thread(this);
} }
} }
}
int WatcherThread::sleep() const { int WatcherThread::sleep() const {
// The WatcherThread does not participate in the safepoint protocol // The WatcherThread does not participate in the safepoint protocol