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/*
* Copyright (c) 1997, 2022, 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_RUNTIME_VMOPERATIONS_HPP
#define SHARE_RUNTIME_VMOPERATIONS_HPP
#include "oops/oop.hpp"
#include "runtime/javaThread.hpp"
#include "runtime/vmOperation.hpp"
#include "runtime/threadSMR.hpp"
class ObjectMonitorsHashtable;
// A hodge podge of commonly used VM Operations
class VM_EmptyOperation : public VM_Operation {
public:
virtual void doit() final {}
virtual bool skip_thread_oop_barriers() const final {
// Neither the doit function nor the safepoint
// cleanup tasks read oops in the Java threads.
return true;
}
};
class VM_Halt: public VM_EmptyOperation {
public:
VMOp_Type type() const { return VMOp_Halt; }
};
class VM_SafepointALot: public VM_EmptyOperation {
public:
VMOp_Type type() const { return VMOp_SafepointALot; }
};
class VM_Cleanup: public VM_EmptyOperation {
public:
VMOp_Type type() const { return VMOp_Cleanup; }
};
// empty vm op, evaluated just to force a safepoint
class VM_ForceSafepoint: public VM_EmptyOperation {
public:
VMOp_Type type() const { return VMOp_ForceSafepoint; }
};
// empty vm op, when forcing a safepoint due to inline cache buffers being full
class VM_ICBufferFull: public VM_EmptyOperation {
public:
VMOp_Type type() const { return VMOp_ICBufferFull; }
};
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; }
};
// 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_CleanClassLoaderDataMetaspaces : public VM_Operation {
public:
VM_CleanClassLoaderDataMetaspaces() {}
VMOp_Type type() const { return VMOp_CleanClassLoaderDataMetaspaces; }
void doit();
};
// 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 {
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_PrintThreads: public VM_Operation {
private:
outputStream* _out;
bool _print_concurrent_locks;
bool _print_extended_info;
bool _print_jni_handle_info;
public:
VM_PrintThreads()
: _out(tty), _print_concurrent_locks(PrintConcurrentLocks), _print_extended_info(false), _print_jni_handle_info(false)
{}
VM_PrintThreads(outputStream* out, bool print_concurrent_locks, bool print_extended_info, bool print_jni_handle_info)
: _out(out), _print_concurrent_locks(print_concurrent_locks), _print_extended_info(print_extended_info),
_print_jni_handle_info(print_jni_handle_info)
{}
VMOp_Type type() const {
return VMOp_PrintThreads;
}
void doit();
bool doit_prologue();
void doit_epilogue();
};
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;
void snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl,
ObjectMonitorsHashtable* table);
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; }
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_RUNTIME_VMOPERATIONS_HPP
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