--- a/src/hotspot/share/runtime/vm_operations.hpp Thu Dec 06 15:44:13 2018 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,512 +0,0 @@
-/*
- * 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
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#ifndef SHARE_VM_RUNTIME_VM_OPERATIONS_HPP
-#define SHARE_VM_RUNTIME_VM_OPERATIONS_HPP
-
-#include "classfile/javaClasses.hpp"
-#include "memory/allocation.hpp"
-#include "oops/oop.hpp"
-#include "runtime/thread.hpp"
-#include "runtime/threadSMR.hpp"
-#include "code/codeCache.hpp"
-
-// The following classes are used for operations
-// initiated by a Java thread but that must
-// take place in the VMThread.
-
-#define VM_OP_ENUM(type) VMOp_##type,
-
-// Note: When new VM_XXX comes up, add 'XXX' to the template table.
-#define VM_OPS_DO(template) \
- template(None) \
- template(ThreadStop) \
- template(ThreadDump) \
- template(PrintThreads) \
- template(FindDeadlocks) \
- template(ClearICs) \
- template(ForceSafepoint) \
- template(ForceAsyncSafepoint) \
- template(Deoptimize) \
- template(DeoptimizeFrame) \
- template(DeoptimizeAll) \
- template(ZombieAll) \
- template(Verify) \
- template(PrintJNI) \
- template(HeapDumper) \
- template(DeoptimizeTheWorld) \
- template(CollectForMetadataAllocation) \
- template(GC_HeapInspection) \
- template(GenCollectFull) \
- template(GenCollectFullConcurrent) \
- template(GenCollectForAllocation) \
- template(ParallelGCFailedAllocation) \
- template(ParallelGCSystemGC) \
- template(CMS_Initial_Mark) \
- template(CMS_Final_Remark) \
- template(G1CollectForAllocation) \
- template(G1CollectFull) \
- template(G1Concurrent) \
- template(ZOperation) \
- template(HandshakeOneThread) \
- template(HandshakeAllThreads) \
- template(HandshakeFallback) \
- template(EnableBiasedLocking) \
- template(RevokeBias) \
- template(BulkRevokeBias) \
- template(PopulateDumpSharedSpace) \
- template(JNIFunctionTableCopier) \
- template(RedefineClasses) \
- template(UpdateForPopTopFrame) \
- template(SetFramePop) \
- template(GetOwnedMonitorInfo) \
- template(GetObjectMonitorUsage) \
- template(GetCurrentContendedMonitor) \
- template(GetStackTrace) \
- template(GetMultipleStackTraces) \
- template(GetAllStackTraces) \
- template(GetThreadListStackTraces) \
- template(GetFrameCount) \
- template(GetFrameLocation) \
- template(ChangeBreakpoints) \
- template(GetOrSetLocal) \
- template(GetCurrentLocation) \
- template(EnterInterpOnlyMode) \
- template(ChangeSingleStep) \
- template(HeapWalkOperation) \
- template(HeapIterateOperation) \
- template(ReportJavaOutOfMemory) \
- template(JFRCheckpoint) \
- template(Exit) \
- template(LinuxDllLoad) \
- template(RotateGCLog) \
- template(WhiteBoxOperation) \
- template(ClassLoaderStatsOperation) \
- template(ClassLoaderHierarchyOperation) \
- template(DumpHashtable) \
- template(DumpTouchedMethods) \
- template(MarkActiveNMethods) \
- template(PrintCompileQueue) \
- template(PrintClassHierarchy) \
- template(ThreadSuspend) \
- template(CTWThreshold) \
- template(ThreadsSuspendJVMTI) \
- template(ICBufferFull) \
- template(ScavengeMonitors) \
- template(PrintMetadata) \
- template(GTestExecuteAtSafepoint) \
-
-class VM_Operation: public CHeapObj<mtInternal> {
- public:
- enum Mode {
- _safepoint, // blocking, safepoint, vm_op C-heap allocated
- _no_safepoint, // blocking, no safepoint, vm_op C-Heap allocated
- _concurrent, // non-blocking, no safepoint, vm_op C-Heap allocated
- _async_safepoint // non-blocking, safepoint, vm_op C-Heap allocated
- };
-
- enum VMOp_Type {
- VM_OPS_DO(VM_OP_ENUM)
- VMOp_Terminating
- };
-
- private:
- Thread* _calling_thread;
- ThreadPriority _priority;
- long _timestamp;
- VM_Operation* _next;
- VM_Operation* _prev;
-
- // The VM operation name array
- static const char* _names[];
-
- public:
- VM_Operation() { _calling_thread = NULL; _next = NULL; _prev = NULL; }
- virtual ~VM_Operation() {}
-
- // VM operation support (used by VM thread)
- Thread* calling_thread() const { return _calling_thread; }
- ThreadPriority priority() { return _priority; }
- void set_calling_thread(Thread* thread, ThreadPriority priority);
-
- long timestamp() const { return _timestamp; }
- void set_timestamp(long timestamp) { _timestamp = timestamp; }
-
- // Called by VM thread - does in turn invoke doit(). Do not override this
- void evaluate();
-
- // evaluate() is called by the VMThread and in turn calls doit().
- // If the thread invoking VMThread::execute((VM_Operation*) is a JavaThread,
- // doit_prologue() is called in that thread before transferring control to
- // the VMThread.
- // If doit_prologue() returns true the VM operation will proceed, and
- // doit_epilogue() will be called by the JavaThread once the VM operation
- // completes. If doit_prologue() returns false the VM operation is cancelled.
- virtual void doit() = 0;
- virtual bool doit_prologue() { return true; };
- virtual void doit_epilogue() {}; // Note: Not called if mode is: _concurrent
-
- // Type test
- virtual bool is_methodCompiler() const { return false; }
-
- // Linking
- VM_Operation *next() const { return _next; }
- VM_Operation *prev() const { return _prev; }
- void set_next(VM_Operation *next) { _next = next; }
- void set_prev(VM_Operation *prev) { _prev = prev; }
-
- // Configuration. Override these appropriately in subclasses.
- virtual VMOp_Type type() const = 0;
- virtual Mode evaluation_mode() const { return _safepoint; }
- virtual bool allow_nested_vm_operations() const { return false; }
- virtual bool is_cheap_allocated() const { return false; }
- virtual void oops_do(OopClosure* f) { /* do nothing */ };
-
- // CAUTION: <don't hang yourself with following rope>
- // If you override these methods, make sure that the evaluation
- // of these methods is race-free and non-blocking, since these
- // methods may be evaluated either by the mutators or by the
- // vm thread, either concurrently with mutators or with the mutators
- // stopped. In other words, taking locks is verboten, and if there
- // are any races in evaluating the conditions, they'd better be benign.
- virtual bool evaluate_at_safepoint() const {
- return evaluation_mode() == _safepoint ||
- evaluation_mode() == _async_safepoint;
- }
- virtual bool evaluate_concurrently() const {
- return evaluation_mode() == _concurrent ||
- evaluation_mode() == _async_safepoint;
- }
-
- static const char* mode_to_string(Mode mode);
-
- // Debugging
- virtual void print_on_error(outputStream* st) const;
- const char* name() const { return _names[type()]; }
- static const char* name(int type) {
- assert(type >= 0 && type < VMOp_Terminating, "invalid VM operation type");
- return _names[type];
- }
-#ifndef PRODUCT
- void print_on(outputStream* st) const { print_on_error(st); }
-#endif
-};
-
-class VM_ThreadStop: public VM_Operation {
- private:
- oop _thread; // The Thread that the Throwable is thrown against
- oop _throwable; // The Throwable thrown at the target Thread
- public:
- // All oops are passed as JNI handles, since there is no guarantee that a GC might happen before the
- // VM operation is executed.
- VM_ThreadStop(oop thread, oop throwable) {
- _thread = thread;
- _throwable = throwable;
- }
- VMOp_Type type() const { return VMOp_ThreadStop; }
- oop target_thread() const { return _thread; }
- oop throwable() const { return _throwable;}
- void doit();
- // We deoptimize if top-most frame is compiled - this might require a C2I adapter to be generated
- bool allow_nested_vm_operations() const { return true; }
- Mode evaluation_mode() const { return _async_safepoint; }
- bool is_cheap_allocated() const { return true; }
-
- // GC support
- void oops_do(OopClosure* f) {
- f->do_oop(&_thread); f->do_oop(&_throwable);
- }
-};
-
-class VM_ClearICs: public VM_Operation {
- private:
- bool _preserve_static_stubs;
- public:
- VM_ClearICs(bool preserve_static_stubs) { _preserve_static_stubs = preserve_static_stubs; }
- void doit();
- VMOp_Type type() const { return VMOp_ClearICs; }
-};
-
-// empty vm op, evaluated just to force a safepoint
-class VM_ForceSafepoint: public VM_Operation {
- public:
- void doit() {}
- VMOp_Type type() const { return VMOp_ForceSafepoint; }
-};
-
-// empty vm op, when forcing a safepoint to suspend a thread
-class VM_ThreadSuspend: public VM_ForceSafepoint {
- public:
- VMOp_Type type() const { return VMOp_ThreadSuspend; }
-};
-
-// empty vm op, when forcing a safepoint due to ctw threshold is reached for the sweeper
-class VM_CTWThreshold: public VM_ForceSafepoint {
- public:
- VMOp_Type type() const { return VMOp_CTWThreshold; }
-};
-
-// empty vm op, when forcing a safepoint to suspend threads from jvmti
-class VM_ThreadsSuspendJVMTI: public VM_ForceSafepoint {
- public:
- VMOp_Type type() const { return VMOp_ThreadsSuspendJVMTI; }
-};
-
-// empty vm op, when forcing a safepoint due to inline cache buffers being full
-class VM_ICBufferFull: public VM_ForceSafepoint {
- public:
- VMOp_Type type() const { return VMOp_ICBufferFull; }
-};
-
-// empty asynchronous vm op, when forcing a safepoint to scavenge monitors
-class VM_ScavengeMonitors: public VM_ForceSafepoint {
- public:
- VMOp_Type type() const { return VMOp_ScavengeMonitors; }
- Mode evaluation_mode() const { return _async_safepoint; }
- bool is_cheap_allocated() const { return true; }
-};
-
-// Base class for invoking parts of a gtest in a safepoint.
-// Derived classes provide the doit method.
-// Typically also need to transition the gtest thread from native to VM.
-class VM_GTestExecuteAtSafepoint: public VM_Operation {
- public:
- VMOp_Type type() const { return VMOp_GTestExecuteAtSafepoint; }
-
- protected:
- VM_GTestExecuteAtSafepoint() {}
-};
-
-class VM_Deoptimize: public VM_Operation {
- public:
- VM_Deoptimize() {}
- VMOp_Type type() const { return VMOp_Deoptimize; }
- void doit();
- bool allow_nested_vm_operations() const { return true; }
-};
-
-class VM_MarkActiveNMethods: public VM_Operation {
- public:
- VM_MarkActiveNMethods() {}
- VMOp_Type type() const { return VMOp_MarkActiveNMethods; }
- void doit();
- bool allow_nested_vm_operations() const { return true; }
-};
-
-// Deopt helper that can deoptimize frames in threads other than the
-// current thread. Only used through Deoptimization::deoptimize_frame.
-class VM_DeoptimizeFrame: public VM_Operation {
- friend class Deoptimization;
-
- private:
- JavaThread* _thread;
- intptr_t* _id;
- int _reason;
- VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id, int reason);
-
- public:
- VMOp_Type type() const { return VMOp_DeoptimizeFrame; }
- void doit();
- bool allow_nested_vm_operations() const { return true; }
-};
-
-#ifndef PRODUCT
-class VM_DeoptimizeAll: public VM_Operation {
- private:
- Klass* _dependee;
- public:
- VM_DeoptimizeAll() {}
- VMOp_Type type() const { return VMOp_DeoptimizeAll; }
- void doit();
- bool allow_nested_vm_operations() const { return true; }
-};
-
-
-class VM_ZombieAll: public VM_Operation {
- public:
- VM_ZombieAll() {}
- VMOp_Type type() const { return VMOp_ZombieAll; }
- void doit();
- bool allow_nested_vm_operations() const { return true; }
-};
-#endif // PRODUCT
-
-class VM_Verify: public VM_Operation {
- public:
- VMOp_Type type() const { return VMOp_Verify; }
- void doit();
-};
-
-
-class VM_PrintThreads: public VM_Operation {
- private:
- outputStream* _out;
- bool _print_concurrent_locks;
- bool _print_extended_info;
- public:
- VM_PrintThreads()
- : _out(tty), _print_concurrent_locks(PrintConcurrentLocks), _print_extended_info(false)
- {}
- VM_PrintThreads(outputStream* out, bool print_concurrent_locks, bool print_extended_info)
- : _out(out), _print_concurrent_locks(print_concurrent_locks), _print_extended_info(print_extended_info)
- {}
- VMOp_Type type() const {
- return VMOp_PrintThreads;
- }
- void doit();
- bool doit_prologue();
- void doit_epilogue();
-};
-
-class VM_PrintJNI: public VM_Operation {
- private:
- outputStream* _out;
- public:
- VM_PrintJNI() { _out = tty; }
- VM_PrintJNI(outputStream* out) { _out = out; }
- VMOp_Type type() const { return VMOp_PrintJNI; }
- void doit();
-};
-
-class VM_PrintMetadata : public VM_Operation {
- private:
- outputStream* const _out;
- const size_t _scale;
- const int _flags;
-
- public:
- VM_PrintMetadata(outputStream* out, size_t scale, int flags)
- : _out(out), _scale(scale), _flags(flags)
- {};
-
- VMOp_Type type() const { return VMOp_PrintMetadata; }
- void doit();
-};
-
-class DeadlockCycle;
-class VM_FindDeadlocks: public VM_Operation {
- private:
- bool _concurrent_locks;
- DeadlockCycle* _deadlocks;
- outputStream* _out;
- ThreadsListSetter _setter; // Helper to set hazard ptr in the originating thread
- // which protects the JavaThreads in _deadlocks.
-
- public:
- VM_FindDeadlocks(bool concurrent_locks) : _concurrent_locks(concurrent_locks), _deadlocks(NULL), _out(NULL), _setter() {};
- VM_FindDeadlocks(outputStream* st) : _concurrent_locks(true), _deadlocks(NULL), _out(st) {};
- ~VM_FindDeadlocks();
-
- DeadlockCycle* result() { return _deadlocks; };
- VMOp_Type type() const { return VMOp_FindDeadlocks; }
- void doit();
-};
-
-class ThreadDumpResult;
-class ThreadSnapshot;
-class ThreadConcurrentLocks;
-
-class VM_ThreadDump : public VM_Operation {
- private:
- ThreadDumpResult* _result;
- int _num_threads;
- GrowableArray<instanceHandle>* _threads;
- int _max_depth;
- bool _with_locked_monitors;
- bool _with_locked_synchronizers;
-
- ThreadSnapshot* snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl);
-
- public:
- VM_ThreadDump(ThreadDumpResult* result,
- int max_depth, // -1 indicates entire stack
- bool with_locked_monitors,
- bool with_locked_synchronizers);
-
- VM_ThreadDump(ThreadDumpResult* result,
- GrowableArray<instanceHandle>* threads,
- int num_threads, // -1 indicates entire stack
- int max_depth,
- bool with_locked_monitors,
- bool with_locked_synchronizers);
-
- VMOp_Type type() const { return VMOp_ThreadDump; }
- void doit();
- bool doit_prologue();
- void doit_epilogue();
-};
-
-
-class VM_Exit: public VM_Operation {
- private:
- int _exit_code;
- static volatile bool _vm_exited;
- static Thread * volatile _shutdown_thread;
- static void wait_if_vm_exited();
- public:
- VM_Exit(int exit_code) {
- _exit_code = exit_code;
- }
- static int wait_for_threads_in_native_to_block();
- static int set_vm_exited();
- static bool vm_exited() { return _vm_exited; }
- static Thread * shutdown_thread() { return _shutdown_thread; }
- static void block_if_vm_exited() {
- if (_vm_exited) {
- wait_if_vm_exited();
- }
- }
- VMOp_Type type() const { return VMOp_Exit; }
- void doit();
-};
-
-class VM_PrintCompileQueue: public VM_Operation {
- private:
- outputStream* _out;
-
- public:
- VM_PrintCompileQueue(outputStream* st) : _out(st) {}
- VMOp_Type type() const { return VMOp_PrintCompileQueue; }
- Mode evaluation_mode() const { return _safepoint; }
- void doit();
-};
-
-#if INCLUDE_SERVICES
-class VM_PrintClassHierarchy: public VM_Operation {
- private:
- outputStream* _out;
- bool _print_interfaces;
- bool _print_subclasses;
- char* _classname;
-
- public:
- VM_PrintClassHierarchy(outputStream* st, bool print_interfaces, bool print_subclasses, char* classname) :
- _out(st), _print_interfaces(print_interfaces), _print_subclasses(print_subclasses),
- _classname(classname) {}
- VMOp_Type type() const { return VMOp_PrintClassHierarchy; }
- void doit();
-};
-#endif // INCLUDE_SERVICES
-
-#endif // SHARE_VM_RUNTIME_VM_OPERATIONS_HPP