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8068592: Remove unused code in objectMonitor.hpp

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Reviewed-by: dholmes, redestad, gthornbr
This commit is contained in:
Daniel D. Daugherty 2016-07-07 14:58:17 -07:00
parent 4d5d6cabdd
commit 8f7e6e317c
3 changed files with 4 additions and 34 deletions
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14
hotspot/src/share/vm/runtime/objectMonitor.cpp
View file

@ -131,8 +131,6 @@ static int Knob_MoveNotifyee = 2; // notify() - disposition of noti
static int Knob_QMode = 0; // EntryList-cxq policy - queue discipline
static volatile int InitDone = 0;
#define TrySpin TrySpin_VaryDuration
// -----------------------------------------------------------------------------
// Theory of operations -- Monitors lists, thread residency, etc:
//
@ -1848,13 +1846,8 @@ void ObjectMonitor::notifyAll(TRAPS) {
// hysteresis control to damp the transition rate between spinning and
// not spinning.
intptr_t ObjectMonitor::SpinCallbackArgument = 0;
int (*ObjectMonitor::SpinCallbackFunction)(intptr_t, int) = NULL;
// Spinning: Fixed frequency (100%), vary duration
int ObjectMonitor::TrySpin_VaryDuration(Thread * Self) {
int ObjectMonitor::TrySpin(Thread * Self) {
// Dumb, brutal spin. Good for comparative measurements against adaptive spinning.
int ctr = Knob_FixedSpin;
if (ctr != 0) {
@ -1948,11 +1941,6 @@ int ObjectMonitor::TrySpin_VaryDuration(Thread * Self) {
goto Abort; // abrupt spin egress
}
if (Knob_UsePause & 1) SpinPause();
int (*scb)(intptr_t,int) = SpinCallbackFunction;
if (hits > 50 && scb != NULL) {
int abend = (*scb)(SpinCallbackArgument, 0);
}
}
if (Knob_UsePause & 2) SpinPause();

20
hotspot/src/share/vm/runtime/objectMonitor.hpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1998, 2016, 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
@ -161,9 +161,6 @@ class ObjectMonitor {
Thread * volatile _Responsible;
volatile int _Spinner; // for exit->spinner handoff optimization
volatile int _SpinFreq; // Spin 1-out-of-N attempts: success rate
volatile int _SpinClock;
volatile intptr_t _SpinState; // MCS/CLH list of spinners
volatile int _SpinDuration;
volatile jint _count; // reference count to prevent reclamation/deflation
@ -238,10 +235,6 @@ class ObjectMonitor {
static int cxq_offset_in_bytes() { return offset_of(ObjectMonitor, _cxq); }
static int succ_offset_in_bytes() { return offset_of(ObjectMonitor, _succ); }
static int EntryList_offset_in_bytes() { return offset_of(ObjectMonitor, _EntryList); }
static int FreeNext_offset_in_bytes() { return offset_of(ObjectMonitor, FreeNext); }
static int WaitSet_offset_in_bytes() { return offset_of(ObjectMonitor, _WaitSet); }
static int Responsible_offset_in_bytes() { return offset_of(ObjectMonitor, _Responsible); }
static int Spinner_offset_in_bytes() { return offset_of(ObjectMonitor, _Spinner); }
// ObjectMonitor references can be ORed with markOopDesc::monitor_value
// as part of the ObjectMonitor tagging mechanism. When we combine an
@ -257,11 +250,6 @@ class ObjectMonitor {
#define OM_OFFSET_NO_MONITOR_VALUE_TAG(f) \
((ObjectMonitor::f ## _offset_in_bytes()) - markOopDesc::monitor_value)
// Eventually we'll make provisions for multiple callbacks, but
// now one will suffice.
static int (*SpinCallbackFunction)(intptr_t, int);
static intptr_t SpinCallbackArgument;
markOop header() const;
void set_header(markOop hdr);
@ -312,8 +300,6 @@ class ObjectMonitor {
_cxq = NULL;
_WaitSet = NULL;
_recursions = 0;
_SpinFreq = 0;
_SpinClock = 0;
}
public:
@ -353,9 +339,7 @@ class ObjectMonitor {
void UnlinkAfterAcquire(Thread * Self, ObjectWaiter * SelfNode);
int TryLock(Thread * Self);
int NotRunnable(Thread * Self, Thread * Owner);
int TrySpin_Fixed(Thread * Self);
int TrySpin_VaryFrequency(Thread * Self);
int TrySpin_VaryDuration(Thread * Self);
int TrySpin(Thread * Self);
void ExitEpilog(Thread * Self, ObjectWaiter * Wakee);
bool ExitSuspendEquivalent(JavaThread * Self);
void post_monitor_wait_event(EventJavaMonitorWait * event,

4
hotspot/src/share/vm/runtime/synchronizer.hpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1998, 2016, 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
@ -144,8 +144,6 @@ class ObjectSynchronizer : AllStatic {
static void verify() PRODUCT_RETURN;
static int verify_objmon_isinpool(ObjectMonitor *addr) PRODUCT_RETURN0;
static void RegisterSpinCallback(int(*)(intptr_t, int), intptr_t);
private:
enum { _BLOCKSIZE = 128 };
// global list of blocks of monitors