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8205417: Obsolete UnlinkSymbolsALot debugging option

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Obsolete and remove support for UnlinkSymbolsALot

Reviewed-by: hseigel, dholmes
This commit is contained in:
Coleen Phillimore 2018-07-06 09:10:07 -04:00
parent 5ff2b5fe98
commit 61d4faee90
6 changed files with 2 additions and 29 deletions
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2
src/hotspot/share/runtime/arguments.cpp
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@ -539,7 +539,6 @@ static SpecialFlag const special_jvm_flags[] = {
{ "PrintSafepointStatisticsTimeout", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
{ "PrintSafepointStatisticsCount",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
{ "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
{ "UnlinkSymbolsALot", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
// --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
{ "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
@ -572,6 +571,7 @@ static SpecialFlag const special_jvm_flags[] = {
{ "NativeMonitorTimeout", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
{ "NativeMonitorSpinLimit", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
{ "NativeMonitorFlags", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
{ "UnlinkSymbolsALot", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
{ "AllowNonVirtualCalls", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
#ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS

3
src/hotspot/share/runtime/globals.hpp
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@ -486,9 +486,6 @@ define_pd_global(uint64_t,MaxRAM, 1ULL*G);
notproduct(bool, ZombieALot, false, \
"Create zombies (non-entrant) at exit from the runtime system") \
\
product(bool, UnlinkSymbolsALot, false, \
"Unlink unreferenced symbols from the symbol table at safepoints")\
\
notproduct(bool, WalkStackALot, false, \
"Trace stack (no print) at every exit from the runtime system") \
\

8
src/hotspot/share/runtime/interfaceSupport.cpp
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@ -66,9 +66,6 @@ VMEntryWrapper::~VMEntryWrapper() {
if (ZombieALot) {
InterfaceSupport::zombieAll();
}
if (UnlinkSymbolsALot) {
InterfaceSupport::unlinkSymbols();
}
// do verification AFTER potential deoptimization
if (VerifyStack) {
InterfaceSupport::verify_stack();
@ -208,11 +205,6 @@ void InterfaceSupport::zombieAll() {
zombieAllCounter++;
}
void InterfaceSupport::unlinkSymbols() {
VM_UnlinkSymbols op;
VMThread::execute(&op);
}
void InterfaceSupport::deoptimizeAll() {
// This method is called by all threads when a thread make
// transition to VM state (for example, runtime calls).

3
src/hotspot/share/runtime/interfaceSupport.inline.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2018, 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
@ -60,7 +60,6 @@ class InterfaceSupport: AllStatic {
static void walk_stack();
static void zombieAll();
static void unlinkSymbols();
static void deoptimizeAll();
static void stress_derived_pointers();
static void verify_stack();

6
src/hotspot/share/runtime/vm_operations.cpp
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@ -192,12 +192,6 @@ void VM_ZombieAll::doit() {
#endif // !PRODUCT
void VM_UnlinkSymbols::doit() {
JavaThread *thread = (JavaThread *)calling_thread();
assert(thread->is_Java_thread(), "must be a Java thread");
SymbolTable::unlink();
}
void VM_Verify::doit() {
Universe::heap()->prepare_for_verify();
Universe::verify();

9
src/hotspot/share/runtime/vm_operations.hpp
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@ -52,7 +52,6 @@
template(DeoptimizeFrame) \
template(DeoptimizeAll) \
template(ZombieAll) \
template(UnlinkSymbols) \
template(Verify) \
template(PrintJNI) \
template(HeapDumper) \
@ -353,14 +352,6 @@ class VM_ZombieAll: public VM_Operation {
};
#endif // PRODUCT
class VM_UnlinkSymbols: public VM_Operation {
public:
VM_UnlinkSymbols() {}
VMOp_Type type() const { return VMOp_UnlinkSymbols; }
void doit();
bool allow_nested_vm_operations() const { return true; }
};
class VM_Verify: public VM_Operation {
public:
VMOp_Type type() const { return VMOp_Verify; }