aoqi@0: /* dbuck@9289: * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. aoqi@0: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. aoqi@0: * aoqi@0: * This code is free software; you can redistribute it and/or modify it aoqi@0: * under the terms of the GNU General Public License version 2 only, as aoqi@0: * published by the Free Software Foundation. aoqi@0: * aoqi@0: * This code is distributed in the hope that it will be useful, but WITHOUT aoqi@0: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or aoqi@0: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License aoqi@0: * version 2 for more details (a copy is included in the LICENSE file that aoqi@0: * accompanied this code). aoqi@0: * aoqi@0: * You should have received a copy of the GNU General Public License version aoqi@0: * 2 along with this work; if not, write to the Free Software Foundation, aoqi@0: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. aoqi@0: * aoqi@0: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA aoqi@0: * or visit www.oracle.com if you need additional information or have any aoqi@0: * questions. aoqi@0: * aoqi@0: */ aoqi@0: aoqi@1: /* aoqi@1: * This file has been modified by Loongson Technology in 2015. These aoqi@1: * modifications are Copyright (c) 2015 Loongson Technology, and are made aoqi@1: * available on the same license terms set forth above. aoqi@1: */ aoqi@1: aoqi@0: #ifndef SHARE_VM_RUNTIME_THREAD_HPP aoqi@0: #define SHARE_VM_RUNTIME_THREAD_HPP aoqi@0: aoqi@0: #include "memory/allocation.hpp" aoqi@0: #include "memory/threadLocalAllocBuffer.hpp" aoqi@0: #include "oops/oop.hpp" aoqi@0: #include "prims/jni.h" aoqi@0: #include "prims/jvmtiExport.hpp" aoqi@0: #include "runtime/frame.hpp" aoqi@0: #include "runtime/javaFrameAnchor.hpp" aoqi@0: #include "runtime/jniHandles.hpp" aoqi@0: #include "runtime/mutexLocker.hpp" aoqi@0: #include "runtime/os.hpp" aoqi@0: #include "runtime/osThread.hpp" aoqi@0: #include "runtime/park.hpp" aoqi@0: #include "runtime/safepoint.hpp" aoqi@0: #include "runtime/stubRoutines.hpp" aoqi@0: #include "runtime/threadLocalStorage.hpp" sla@7107: #include "runtime/thread_ext.hpp" aoqi@0: #include "runtime/unhandledOops.hpp" aoqi@0: #include "trace/traceBackend.hpp" aoqi@0: #include "trace/traceMacros.hpp" aoqi@0: #include "utilities/exceptions.hpp" stefank@7333: #include "utilities/macros.hpp" aoqi@0: #include "utilities/top.hpp" aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: #include "gc_implementation/g1/dirtyCardQueue.hpp" aoqi@0: #include "gc_implementation/g1/satbQueue.hpp" aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: #ifdef TARGET_ARCH_zero aoqi@0: # include "stack_zero.hpp" aoqi@0: #endif aoqi@0: aoqi@0: class ThreadSafepointState; aoqi@0: class ThreadProfiler; aoqi@0: aoqi@0: class JvmtiThreadState; aoqi@0: class JvmtiGetLoadedClassesClosure; aoqi@0: class ThreadStatistics; aoqi@0: class ConcurrentLocksDump; aoqi@0: class ParkEvent; aoqi@0: class Parker; aoqi@0: aoqi@0: class ciEnv; aoqi@0: class CompileThread; aoqi@0: class CompileLog; aoqi@0: class CompileTask; aoqi@0: class CompileQueue; aoqi@0: class CompilerCounters; aoqi@0: class vframeArray; aoqi@0: aoqi@0: class DeoptResourceMark; aoqi@0: class jvmtiDeferredLocalVariableSet; aoqi@0: aoqi@0: class GCTaskQueue; aoqi@0: class ThreadClosure; aoqi@0: class IdealGraphPrinter; aoqi@0: stefank@7333: class Metadata; stefank@7333: template class ChunkedList; stefank@7333: typedef ChunkedList MetadataOnStackBuffer; stefank@7333: aoqi@0: DEBUG_ONLY(class ResourceMark;) aoqi@0: aoqi@0: class WorkerThread; aoqi@0: aoqi@0: // Class hierarchy aoqi@0: // - Thread aoqi@0: // - NamedThread aoqi@0: // - VMThread aoqi@0: // - ConcurrentGCThread aoqi@0: // - WorkerThread aoqi@0: // - GangWorker aoqi@0: // - GCTaskThread aoqi@0: // - JavaThread aoqi@0: // - WatcherThread aoqi@0: aoqi@0: class Thread: public ThreadShadow { aoqi@0: friend class VMStructs; aoqi@0: private: aoqi@0: // Exception handling aoqi@0: // (Note: _pending_exception and friends are in ThreadShadow) aoqi@0: //oop _pending_exception; // pending exception for current thread aoqi@0: // const char* _exception_file; // file information for exception (debugging only) aoqi@0: // int _exception_line; // line information for exception (debugging only) aoqi@0: protected: aoqi@0: // Support for forcing alignment of thread objects for biased locking aoqi@0: void* _real_malloc_address; aoqi@0: public: aoqi@0: void* operator new(size_t size) throw() { return allocate(size, true); } aoqi@0: void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { aoqi@0: return allocate(size, false); } aoqi@0: void operator delete(void* p); aoqi@0: aoqi@0: protected: aoqi@0: static void* allocate(size_t size, bool throw_excpt, MEMFLAGS flags = mtThread); aoqi@0: private: aoqi@0: aoqi@0: // *************************************************************** aoqi@0: // Suspend and resume support aoqi@0: // *************************************************************** aoqi@0: // aoqi@0: // VM suspend/resume no longer exists - it was once used for various aoqi@0: // things including safepoints but was deprecated and finally removed aoqi@0: // in Java 7. Because VM suspension was considered "internal" Java-level aoqi@0: // suspension was considered "external", and this legacy naming scheme aoqi@0: // remains. aoqi@0: // aoqi@0: // External suspend/resume requests come from JVM_SuspendThread, aoqi@0: // JVM_ResumeThread, JVMTI SuspendThread, and finally JVMTI aoqi@0: // ResumeThread. External aoqi@0: // suspend requests cause _external_suspend to be set and external aoqi@0: // resume requests cause _external_suspend to be cleared. aoqi@0: // External suspend requests do not nest on top of other external aoqi@0: // suspend requests. The higher level APIs reject suspend requests aoqi@0: // for already suspended threads. aoqi@0: // aoqi@0: // The external_suspend aoqi@0: // flag is checked by has_special_runtime_exit_condition() and java thread aoqi@0: // will self-suspend when handle_special_runtime_exit_condition() is aoqi@0: // called. Most uses of the _thread_blocked state in JavaThreads are aoqi@0: // considered the same as being externally suspended; if the blocking aoqi@0: // condition lifts, the JavaThread will self-suspend. Other places aoqi@0: // where VM checks for external_suspend include: aoqi@0: // + mutex granting (do not enter monitors when thread is suspended) aoqi@0: // + state transitions from _thread_in_native aoqi@0: // aoqi@0: // In general, java_suspend() does not wait for an external suspend aoqi@0: // request to complete. When it returns, the only guarantee is that aoqi@0: // the _external_suspend field is true. aoqi@0: // aoqi@0: // wait_for_ext_suspend_completion() is used to wait for an external aoqi@0: // suspend request to complete. External suspend requests are usually aoqi@0: // followed by some other interface call that requires the thread to aoqi@0: // be quiescent, e.g., GetCallTrace(). By moving the "wait time" into aoqi@0: // the interface that requires quiescence, we give the JavaThread a aoqi@0: // chance to self-suspend before we need it to be quiescent. This aoqi@0: // improves overall suspend/query performance. aoqi@0: // aoqi@0: // _suspend_flags controls the behavior of java_ suspend/resume. aoqi@0: // It must be set under the protection of SR_lock. Read from the flag is aoqi@0: // OK without SR_lock as long as the value is only used as a hint. aoqi@0: // (e.g., check _external_suspend first without lock and then recheck aoqi@0: // inside SR_lock and finish the suspension) aoqi@0: // aoqi@0: // _suspend_flags is also overloaded for other "special conditions" so aoqi@0: // that a single check indicates whether any special action is needed aoqi@0: // eg. for async exceptions. aoqi@0: // ------------------------------------------------------------------- aoqi@0: // Notes: aoqi@0: // 1. The suspend/resume logic no longer uses ThreadState in OSThread aoqi@0: // but we still update its value to keep other part of the system (mainly aoqi@0: // JVMTI) happy. ThreadState is legacy code (see notes in aoqi@0: // osThread.hpp). aoqi@0: // aoqi@0: // 2. It would be more natural if set_external_suspend() is private and aoqi@0: // part of java_suspend(), but that probably would affect the suspend/query aoqi@0: // performance. Need more investigation on this. aoqi@0: // aoqi@0: aoqi@0: // suspend/resume lock: used for self-suspend aoqi@0: Monitor* _SR_lock; aoqi@0: aoqi@0: protected: aoqi@0: enum SuspendFlags { aoqi@0: // NOTE: avoid using the sign-bit as cc generates different test code aoqi@0: // when the sign-bit is used, and sometimes incorrectly - see CR 6398077 aoqi@0: aoqi@0: _external_suspend = 0x20000000U, // thread is asked to self suspend aoqi@0: _ext_suspended = 0x40000000U, // thread has self-suspended aoqi@0: _deopt_suspend = 0x10000000U, // thread needs to self suspend for deopt aoqi@0: aoqi@0: _has_async_exception = 0x00000001U, // there is a pending async exception aoqi@0: _critical_native_unlock = 0x00000002U // Must call back to unlock JNI critical lock aoqi@0: }; aoqi@0: aoqi@0: // various suspension related flags - atomically updated aoqi@0: // overloaded for async exception checking in check_special_condition_for_native_trans. aoqi@0: volatile uint32_t _suspend_flags; aoqi@0: aoqi@0: private: aoqi@0: int _num_nested_signal; aoqi@0: aoqi@0: public: aoqi@0: void enter_signal_handler() { _num_nested_signal++; } aoqi@0: void leave_signal_handler() { _num_nested_signal--; } aoqi@0: bool is_inside_signal_handler() const { return _num_nested_signal > 0; } aoqi@0: aoqi@0: private: aoqi@0: // Debug tracing aoqi@0: static void trace(const char* msg, const Thread* const thread) PRODUCT_RETURN; aoqi@0: aoqi@0: // Active_handles points to a block of handles aoqi@0: JNIHandleBlock* _active_handles; aoqi@0: aoqi@0: // One-element thread local free list aoqi@0: JNIHandleBlock* _free_handle_block; aoqi@0: aoqi@0: // Point to the last handle mark aoqi@0: HandleMark* _last_handle_mark; aoqi@0: aoqi@0: // The parity of the last strong_roots iteration in which this thread was aoqi@0: // claimed as a task. aoqi@0: jint _oops_do_parity; aoqi@0: aoqi@0: public: aoqi@0: void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; } aoqi@0: HandleMark* last_handle_mark() const { return _last_handle_mark; } aoqi@0: private: aoqi@0: aoqi@0: // debug support for checking if code does allow safepoints or not aoqi@0: // GC points in the VM can happen because of allocation, invoking a VM operation, or blocking on aoqi@0: // mutex, or blocking on an object synchronizer (Java locking). aoqi@0: // If !allow_safepoint(), then an assertion failure will happen in any of the above cases aoqi@0: // If !allow_allocation(), then an assertion failure will happen during allocation aoqi@0: // (Hence, !allow_safepoint() => !allow_allocation()). aoqi@0: // aoqi@0: // The two classes No_Safepoint_Verifier and No_Allocation_Verifier are used to set these counters. aoqi@0: // aoqi@0: NOT_PRODUCT(int _allow_safepoint_count;) // If 0, thread allow a safepoint to happen aoqi@0: debug_only (int _allow_allocation_count;) // If 0, the thread is allowed to allocate oops. aoqi@0: aoqi@0: // Used by SkipGCALot class. aoqi@0: NOT_PRODUCT(bool _skip_gcalot;) // Should we elide gc-a-lot? aoqi@0: aoqi@0: friend class No_Alloc_Verifier; aoqi@0: friend class No_Safepoint_Verifier; aoqi@0: friend class Pause_No_Safepoint_Verifier; aoqi@0: friend class ThreadLocalStorage; aoqi@0: friend class GC_locker; aoqi@0: aoqi@0: ThreadLocalAllocBuffer _tlab; // Thread-local eden aoqi@0: jlong _allocated_bytes; // Cumulative number of bytes allocated on aoqi@0: // the Java heap aoqi@0: stefank@7333: // Thread-local buffer used by MetadataOnStackMark. stefank@7333: MetadataOnStackBuffer* _metadata_on_stack_buffer; stefank@7333: aoqi@0: TRACE_DATA _trace_data; // Thread-local data for tracing aoqi@0: sla@7107: ThreadExt _ext; sla@7107: aoqi@0: int _vm_operation_started_count; // VM_Operation support aoqi@0: int _vm_operation_completed_count; // VM_Operation support aoqi@0: aoqi@0: ObjectMonitor* _current_pending_monitor; // ObjectMonitor this thread aoqi@0: // is waiting to lock aoqi@0: bool _current_pending_monitor_is_from_java; // locking is from Java code aoqi@0: aoqi@0: // ObjectMonitor on which this thread called Object.wait() aoqi@0: ObjectMonitor* _current_waiting_monitor; aoqi@0: aoqi@0: // Private thread-local objectmonitor list - a simple cache organized as a SLL. aoqi@0: public: aoqi@0: ObjectMonitor* omFreeList; aoqi@0: int omFreeCount; // length of omFreeList aoqi@0: int omFreeProvision; // reload chunk size aoqi@0: ObjectMonitor* omInUseList; // SLL to track monitors in circulation aoqi@0: int omInUseCount; // length of omInUseList aoqi@0: aoqi@0: #ifdef ASSERT aoqi@0: private: aoqi@0: bool _visited_for_critical_count; aoqi@0: aoqi@0: public: aoqi@0: void set_visited_for_critical_count(bool z) { _visited_for_critical_count = z; } aoqi@0: bool was_visited_for_critical_count() const { return _visited_for_critical_count; } aoqi@0: #endif aoqi@0: aoqi@0: public: aoqi@0: enum { aoqi@0: is_definitely_current_thread = true aoqi@0: }; aoqi@0: aoqi@0: // Constructor aoqi@0: Thread(); aoqi@0: virtual ~Thread(); aoqi@0: aoqi@0: // initializtion aoqi@0: void initialize_thread_local_storage(); aoqi@0: aoqi@0: // thread entry point aoqi@0: virtual void run(); aoqi@0: aoqi@0: // Testers aoqi@0: virtual bool is_VM_thread() const { return false; } aoqi@0: virtual bool is_Java_thread() const { return false; } aoqi@0: virtual bool is_Compiler_thread() const { return false; } aoqi@0: virtual bool is_hidden_from_external_view() const { return false; } aoqi@0: virtual bool is_jvmti_agent_thread() const { return false; } aoqi@0: // True iff the thread can perform GC operations at a safepoint. aoqi@0: // Generally will be true only of VM thread and parallel GC WorkGang aoqi@0: // threads. aoqi@0: virtual bool is_GC_task_thread() const { return false; } aoqi@0: virtual bool is_Watcher_thread() const { return false; } aoqi@0: virtual bool is_ConcurrentGC_thread() const { return false; } aoqi@0: virtual bool is_Named_thread() const { return false; } aoqi@0: virtual bool is_Worker_thread() const { return false; } aoqi@0: aoqi@0: // Casts aoqi@0: virtual WorkerThread* as_Worker_thread() const { return NULL; } aoqi@0: aoqi@0: virtual char* name() const { return (char*)"Unknown thread"; } aoqi@0: aoqi@0: // Returns the current thread aoqi@0: static inline Thread* current(); aoqi@0: aoqi@0: // Common thread operations aoqi@0: static void set_priority(Thread* thread, ThreadPriority priority); aoqi@0: static ThreadPriority get_priority(const Thread* const thread); aoqi@0: static void start(Thread* thread); aoqi@0: static void interrupt(Thread* thr); aoqi@0: static bool is_interrupted(Thread* thr, bool clear_interrupted); aoqi@0: aoqi@0: void set_native_thread_name(const char *name) { aoqi@0: assert(Thread::current() == this, "set_native_thread_name can only be called on the current thread"); aoqi@0: os::set_native_thread_name(name); aoqi@0: } aoqi@0: aoqi@0: ObjectMonitor** omInUseList_addr() { return (ObjectMonitor **)&omInUseList; } aoqi@0: Monitor* SR_lock() const { return _SR_lock; } aoqi@0: aoqi@0: bool has_async_exception() const { return (_suspend_flags & _has_async_exception) != 0; } aoqi@0: aoqi@0: void set_suspend_flag(SuspendFlags f) { aoqi@0: assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); aoqi@0: uint32_t flags; aoqi@0: do { aoqi@0: flags = _suspend_flags; aoqi@0: } aoqi@0: while (Atomic::cmpxchg((jint)(flags | f), aoqi@0: (volatile jint*)&_suspend_flags, aoqi@0: (jint)flags) != (jint)flags); aoqi@0: } aoqi@0: void clear_suspend_flag(SuspendFlags f) { aoqi@0: assert(sizeof(jint) == sizeof(_suspend_flags), "size mismatch"); aoqi@0: uint32_t flags; aoqi@0: do { aoqi@0: flags = _suspend_flags; aoqi@0: } aoqi@0: while (Atomic::cmpxchg((jint)(flags & ~f), aoqi@0: (volatile jint*)&_suspend_flags, aoqi@0: (jint)flags) != (jint)flags); aoqi@0: } aoqi@0: aoqi@0: void set_has_async_exception() { aoqi@0: set_suspend_flag(_has_async_exception); aoqi@0: } aoqi@0: void clear_has_async_exception() { aoqi@0: clear_suspend_flag(_has_async_exception); aoqi@0: } aoqi@0: aoqi@0: bool do_critical_native_unlock() const { return (_suspend_flags & _critical_native_unlock) != 0; } aoqi@0: aoqi@0: void set_critical_native_unlock() { aoqi@0: set_suspend_flag(_critical_native_unlock); aoqi@0: } aoqi@0: void clear_critical_native_unlock() { aoqi@0: clear_suspend_flag(_critical_native_unlock); aoqi@0: } aoqi@0: aoqi@0: // Support for Unhandled Oop detection aoqi@0: #ifdef CHECK_UNHANDLED_OOPS aoqi@0: private: aoqi@0: UnhandledOops* _unhandled_oops; aoqi@0: public: aoqi@0: UnhandledOops* unhandled_oops() { return _unhandled_oops; } aoqi@0: // Mark oop safe for gc. It may be stack allocated but won't move. aoqi@0: void allow_unhandled_oop(oop *op) { aoqi@0: if (CheckUnhandledOops) unhandled_oops()->allow_unhandled_oop(op); aoqi@0: } aoqi@0: // Clear oops at safepoint so crashes point to unhandled oop violator aoqi@0: void clear_unhandled_oops() { aoqi@0: if (CheckUnhandledOops) unhandled_oops()->clear_unhandled_oops(); aoqi@0: } aoqi@0: #endif // CHECK_UNHANDLED_OOPS aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: bool skip_gcalot() { return _skip_gcalot; } aoqi@0: void set_skip_gcalot(bool v) { _skip_gcalot = v; } aoqi@0: #endif aoqi@0: aoqi@0: public: aoqi@0: // Installs a pending exception to be inserted later aoqi@0: static void send_async_exception(oop thread_oop, oop java_throwable); aoqi@0: aoqi@0: // Resource area aoqi@0: ResourceArea* resource_area() const { return _resource_area; } aoqi@0: void set_resource_area(ResourceArea* area) { _resource_area = area; } aoqi@0: aoqi@0: OSThread* osthread() const { return _osthread; } aoqi@0: void set_osthread(OSThread* thread) { _osthread = thread; } aoqi@0: aoqi@0: // JNI handle support aoqi@0: JNIHandleBlock* active_handles() const { return _active_handles; } aoqi@0: void set_active_handles(JNIHandleBlock* block) { _active_handles = block; } aoqi@0: JNIHandleBlock* free_handle_block() const { return _free_handle_block; } aoqi@0: void set_free_handle_block(JNIHandleBlock* block) { _free_handle_block = block; } aoqi@0: aoqi@0: // Internal handle support aoqi@0: HandleArea* handle_area() const { return _handle_area; } aoqi@0: void set_handle_area(HandleArea* area) { _handle_area = area; } aoqi@0: aoqi@0: GrowableArray* metadata_handles() const { return _metadata_handles; } aoqi@0: void set_metadata_handles(GrowableArray* handles){ _metadata_handles = handles; } aoqi@0: aoqi@0: // Thread-Local Allocation Buffer (TLAB) support aoqi@0: ThreadLocalAllocBuffer& tlab() { return _tlab; } aoqi@0: void initialize_tlab() { aoqi@0: if (UseTLAB) { aoqi@0: tlab().initialize(); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: jlong allocated_bytes() { return _allocated_bytes; } aoqi@0: void set_allocated_bytes(jlong value) { _allocated_bytes = value; } aoqi@0: void incr_allocated_bytes(jlong size) { _allocated_bytes += size; } goetz@6911: inline jlong cooked_allocated_bytes(); aoqi@0: aoqi@0: TRACE_DATA* trace_data() { return &_trace_data; } aoqi@0: sla@7107: const ThreadExt& ext() const { return _ext; } sla@7107: ThreadExt& ext() { return _ext; } sla@7107: aoqi@0: // VM operation support aoqi@0: int vm_operation_ticket() { return ++_vm_operation_started_count; } aoqi@0: int vm_operation_completed_count() { return _vm_operation_completed_count; } aoqi@0: void increment_vm_operation_completed_count() { _vm_operation_completed_count++; } aoqi@0: aoqi@0: // For tracking the heavyweight monitor the thread is pending on. aoqi@0: ObjectMonitor* current_pending_monitor() { aoqi@0: return _current_pending_monitor; aoqi@0: } aoqi@0: void set_current_pending_monitor(ObjectMonitor* monitor) { aoqi@0: _current_pending_monitor = monitor; aoqi@0: } aoqi@0: void set_current_pending_monitor_is_from_java(bool from_java) { aoqi@0: _current_pending_monitor_is_from_java = from_java; aoqi@0: } aoqi@0: bool current_pending_monitor_is_from_java() { aoqi@0: return _current_pending_monitor_is_from_java; aoqi@0: } aoqi@0: aoqi@0: // For tracking the ObjectMonitor on which this thread called Object.wait() aoqi@0: ObjectMonitor* current_waiting_monitor() { aoqi@0: return _current_waiting_monitor; aoqi@0: } aoqi@0: void set_current_waiting_monitor(ObjectMonitor* monitor) { aoqi@0: _current_waiting_monitor = monitor; aoqi@0: } aoqi@0: aoqi@0: // GC support aoqi@0: // Apply "f->do_oop" to all root oops in "this". aoqi@0: // Apply "cld_f->do_cld" to CLDs that are otherwise not kept alive. aoqi@0: // Used by JavaThread::oops_do. aoqi@0: // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames stefank@6973: virtual void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); aoqi@0: aoqi@0: // Handles the parallel case for the method below. aoqi@0: private: aoqi@0: bool claim_oops_do_par_case(int collection_parity); aoqi@0: public: stefank@6992: // Requires that "collection_parity" is that of the current roots aoqi@0: // iteration. If "is_par" is false, sets the parity of "this" to aoqi@0: // "collection_parity", and returns "true". If "is_par" is true, aoqi@0: // uses an atomic instruction to set the current threads parity to aoqi@0: // "collection_parity", if it is not already. Returns "true" iff the aoqi@0: // calling thread does the update, this indicates that the calling thread aoqi@0: // has claimed the thread's stack as a root groop in the current aoqi@0: // collection. aoqi@0: bool claim_oops_do(bool is_par, int collection_parity) { aoqi@0: if (!is_par) { aoqi@0: _oops_do_parity = collection_parity; aoqi@0: return true; aoqi@0: } else { aoqi@0: return claim_oops_do_par_case(collection_parity); aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // Sweeper support aoqi@0: void nmethods_do(CodeBlobClosure* cf); aoqi@0: aoqi@0: // jvmtiRedefineClasses support aoqi@0: void metadata_do(void f(Metadata*)); aoqi@0: aoqi@0: // Used by fast lock support aoqi@0: virtual bool is_lock_owned(address adr) const; aoqi@0: aoqi@0: // Check if address is in the stack of the thread (not just for locks). aoqi@0: // Warning: the method can only be used on the running thread aoqi@0: bool is_in_stack(address adr) const; aoqi@0: // Check if address is in the usable part of the stack (excludes protected aoqi@0: // guard pages) aoqi@0: bool is_in_usable_stack(address adr) const; aoqi@0: aoqi@0: // Sets this thread as starting thread. Returns failure if thread aoqi@0: // creation fails due to lack of memory, too many threads etc. aoqi@0: bool set_as_starting_thread(); aoqi@0: stefank@7333: void set_metadata_on_stack_buffer(MetadataOnStackBuffer* buffer) { _metadata_on_stack_buffer = buffer; } stefank@7333: MetadataOnStackBuffer* metadata_on_stack_buffer() const { return _metadata_on_stack_buffer; } stefank@7333: stefank@7333: protected: aoqi@0: // OS data associated with the thread aoqi@0: OSThread* _osthread; // Platform-specific thread information aoqi@0: aoqi@0: // Thread local resource area for temporary allocation within the VM aoqi@0: ResourceArea* _resource_area; aoqi@0: aoqi@0: DEBUG_ONLY(ResourceMark* _current_resource_mark;) aoqi@0: aoqi@0: // Thread local handle area for allocation of handles within the VM aoqi@0: HandleArea* _handle_area; aoqi@0: GrowableArray* _metadata_handles; aoqi@0: aoqi@0: // Support for stack overflow handling, get_thread, etc. aoqi@0: address _stack_base; aoqi@0: size_t _stack_size; aoqi@0: uintptr_t _self_raw_id; // used by get_thread (mutable) aoqi@0: int _lgrp_id; aoqi@0: aoqi@0: public: aoqi@0: // Stack overflow support aoqi@0: address stack_base() const { assert(_stack_base != NULL,"Sanity check"); return _stack_base; } aoqi@0: aoqi@0: void set_stack_base(address base) { _stack_base = base; } aoqi@0: size_t stack_size() const { return _stack_size; } aoqi@0: void set_stack_size(size_t size) { _stack_size = size; } aoqi@0: void record_stack_base_and_size(); aoqi@0: aoqi@0: bool on_local_stack(address adr) const { aoqi@0: /* QQQ this has knowledge of direction, ought to be a stack method */ aoqi@0: return (_stack_base >= adr && adr >= (_stack_base - _stack_size)); aoqi@0: } aoqi@0: aoqi@0: uintptr_t self_raw_id() { return _self_raw_id; } aoqi@0: void set_self_raw_id(uintptr_t value) { _self_raw_id = value; } aoqi@0: aoqi@0: int lgrp_id() const { return _lgrp_id; } aoqi@0: void set_lgrp_id(int value) { _lgrp_id = value; } aoqi@0: aoqi@0: // Printing aoqi@0: void print_on(outputStream* st) const; aoqi@0: void print() const { print_on(tty); } aoqi@0: virtual void print_on_error(outputStream* st, char* buf, int buflen) const; aoqi@0: aoqi@0: // Debug-only code aoqi@0: #ifdef ASSERT aoqi@0: private: aoqi@0: // Deadlock detection support for Mutex locks. List of locks own by thread. aoqi@0: Monitor* _owned_locks; aoqi@0: // Mutex::set_owner_implementation is the only place where _owned_locks is modified, aoqi@0: // thus the friendship aoqi@0: friend class Mutex; aoqi@0: friend class Monitor; aoqi@0: aoqi@0: public: aoqi@0: void print_owned_locks_on(outputStream* st) const; aoqi@0: void print_owned_locks() const { print_owned_locks_on(tty); } aoqi@0: Monitor* owned_locks() const { return _owned_locks; } aoqi@0: bool owns_locks() const { return owned_locks() != NULL; } aoqi@0: bool owns_locks_but_compiled_lock() const; aoqi@0: aoqi@0: // Deadlock detection aoqi@0: bool allow_allocation() { return _allow_allocation_count == 0; } aoqi@0: ResourceMark* current_resource_mark() { return _current_resource_mark; } aoqi@0: void set_current_resource_mark(ResourceMark* rm) { _current_resource_mark = rm; } aoqi@0: #endif aoqi@0: aoqi@0: void check_for_valid_safepoint_state(bool potential_vm_operation) PRODUCT_RETURN; aoqi@0: aoqi@0: private: aoqi@0: volatile int _jvmti_env_iteration_count; aoqi@0: aoqi@0: public: aoqi@0: void entering_jvmti_env_iteration() { ++_jvmti_env_iteration_count; } aoqi@0: void leaving_jvmti_env_iteration() { --_jvmti_env_iteration_count; } aoqi@0: bool is_inside_jvmti_env_iteration() { return _jvmti_env_iteration_count > 0; } aoqi@0: aoqi@0: // Code generation aoqi@0: static ByteSize exception_file_offset() { return byte_offset_of(Thread, _exception_file ); } aoqi@0: static ByteSize exception_line_offset() { return byte_offset_of(Thread, _exception_line ); } aoqi@0: static ByteSize active_handles_offset() { return byte_offset_of(Thread, _active_handles ); } aoqi@0: aoqi@0: static ByteSize stack_base_offset() { return byte_offset_of(Thread, _stack_base ); } aoqi@0: static ByteSize stack_size_offset() { return byte_offset_of(Thread, _stack_size ); } aoqi@0: aoqi@0: #define TLAB_FIELD_OFFSET(name) \ aoqi@0: static ByteSize tlab_##name##_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::name##_offset(); } aoqi@0: aoqi@0: TLAB_FIELD_OFFSET(start) aoqi@0: TLAB_FIELD_OFFSET(end) aoqi@0: TLAB_FIELD_OFFSET(top) aoqi@0: TLAB_FIELD_OFFSET(pf_top) aoqi@0: TLAB_FIELD_OFFSET(size) // desired_size aoqi@0: TLAB_FIELD_OFFSET(refill_waste_limit) aoqi@0: TLAB_FIELD_OFFSET(number_of_refills) aoqi@0: TLAB_FIELD_OFFSET(fast_refill_waste) aoqi@0: TLAB_FIELD_OFFSET(slow_allocations) aoqi@0: aoqi@0: #undef TLAB_FIELD_OFFSET aoqi@0: aoqi@0: static ByteSize allocated_bytes_offset() { return byte_offset_of(Thread, _allocated_bytes ); } aoqi@0: aoqi@0: public: aoqi@0: volatile intptr_t _Stalled ; aoqi@0: volatile int _TypeTag ; aoqi@0: ParkEvent * _ParkEvent ; // for synchronized() aoqi@0: ParkEvent * _SleepEvent ; // for Thread.sleep aoqi@0: ParkEvent * _MutexEvent ; // for native internal Mutex/Monitor aoqi@0: ParkEvent * _MuxEvent ; // for low-level muxAcquire-muxRelease aoqi@0: int NativeSyncRecursion ; // diagnostic aoqi@0: aoqi@0: volatile int _OnTrap ; // Resume-at IP delta aoqi@0: jint _hashStateW ; // Marsaglia Shift-XOR thread-local RNG aoqi@0: jint _hashStateX ; // thread-specific hashCode generator state aoqi@0: jint _hashStateY ; aoqi@0: jint _hashStateZ ; aoqi@0: void * _schedctl ; aoqi@0: aoqi@0: aoqi@0: volatile jint rng [4] ; // RNG for spin loop aoqi@0: aoqi@0: // Low-level leaf-lock primitives used to implement synchronization aoqi@0: // and native monitor-mutex infrastructure. aoqi@0: // Not for general synchronization use. aoqi@0: static void SpinAcquire (volatile int * Lock, const char * Name) ; aoqi@0: static void SpinRelease (volatile int * Lock) ; aoqi@0: static void muxAcquire (volatile intptr_t * Lock, const char * Name) ; aoqi@0: static void muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) ; aoqi@0: static void muxRelease (volatile intptr_t * Lock) ; aoqi@0: }; aoqi@0: aoqi@0: // Inline implementation of Thread::current() aoqi@0: // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of aoqi@0: // startup. aoqi@0: // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same aoqi@0: // period. This is inlined in thread_.inline.hpp. aoqi@0: aoqi@0: inline Thread* Thread::current() { aoqi@0: #ifdef ASSERT aoqi@0: // This function is very high traffic. Define PARANOID to enable expensive aoqi@0: // asserts. aoqi@0: #ifdef PARANOID aoqi@0: // Signal handler should call ThreadLocalStorage::get_thread_slow() aoqi@0: Thread* t = ThreadLocalStorage::get_thread_slow(); aoqi@0: assert(t != NULL && !t->is_inside_signal_handler(), aoqi@0: "Don't use Thread::current() inside signal handler"); aoqi@0: #endif aoqi@0: #endif aoqi@0: Thread* thread = ThreadLocalStorage::thread(); aoqi@0: assert(thread != NULL, "just checking"); aoqi@0: return thread; aoqi@0: } aoqi@0: aoqi@0: // Name support for threads. non-JavaThread subclasses with multiple aoqi@0: // uniquely named instances should derive from this. aoqi@0: class NamedThread: public Thread { aoqi@0: friend class VMStructs; aoqi@0: enum { aoqi@0: max_name_len = 64 aoqi@0: }; aoqi@0: private: aoqi@0: char* _name; aoqi@0: // log JavaThread being processed by oops_do aoqi@0: JavaThread* _processed_thread; aoqi@0: aoqi@0: public: aoqi@0: NamedThread(); aoqi@0: ~NamedThread(); aoqi@0: // May only be called once per thread. aoqi@0: void set_name(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); aoqi@0: virtual bool is_Named_thread() const { return true; } aoqi@0: virtual char* name() const { return _name == NULL ? (char*)"Unknown Thread" : _name; } aoqi@0: JavaThread *processed_thread() { return _processed_thread; } aoqi@0: void set_processed_thread(JavaThread *thread) { _processed_thread = thread; } aoqi@0: }; aoqi@0: aoqi@0: // Worker threads are named and have an id of an assigned work. aoqi@0: class WorkerThread: public NamedThread { aoqi@0: private: aoqi@0: uint _id; aoqi@0: public: aoqi@0: WorkerThread() : _id(0) { } aoqi@0: virtual bool is_Worker_thread() const { return true; } aoqi@0: aoqi@0: virtual WorkerThread* as_Worker_thread() const { aoqi@0: assert(is_Worker_thread(), "Dubious cast to WorkerThread*?"); aoqi@0: return (WorkerThread*) this; aoqi@0: } aoqi@0: aoqi@0: void set_id(uint work_id) { _id = work_id; } aoqi@0: uint id() const { return _id; } aoqi@0: }; aoqi@0: aoqi@0: // A single WatcherThread is used for simulating timer interrupts. aoqi@0: class WatcherThread: public Thread { aoqi@0: friend class VMStructs; aoqi@0: public: aoqi@0: virtual void run(); aoqi@0: aoqi@0: private: aoqi@0: static WatcherThread* _watcher_thread; aoqi@0: aoqi@0: static bool _startable; aoqi@0: volatile static bool _should_terminate; // updated without holding lock aoqi@0: aoqi@0: os::WatcherThreadCrashProtection* _crash_protection; aoqi@0: public: aoqi@0: enum SomeConstants { aoqi@0: delay_interval = 10 // interrupt delay in milliseconds aoqi@0: }; aoqi@0: aoqi@0: // Constructor aoqi@0: WatcherThread(); aoqi@0: aoqi@0: // Tester aoqi@0: bool is_Watcher_thread() const { return true; } aoqi@0: aoqi@0: // Printing aoqi@0: char* name() const { return (char*)"VM Periodic Task Thread"; } aoqi@0: void print_on(outputStream* st) const; aoqi@0: void print() const { print_on(tty); } aoqi@0: void unpark(); aoqi@0: aoqi@0: // Returns the single instance of WatcherThread aoqi@0: static WatcherThread* watcher_thread() { return _watcher_thread; } aoqi@0: aoqi@0: // Create and start the single instance of WatcherThread, or stop it on shutdown aoqi@0: static void start(); aoqi@0: static void stop(); aoqi@0: // Only allow start once the VM is sufficiently initialized aoqi@0: // Otherwise the first task to enroll will trigger the start aoqi@0: static void make_startable(); aoqi@0: aoqi@0: void set_crash_protection(os::WatcherThreadCrashProtection* crash_protection) { aoqi@0: assert(Thread::current()->is_Watcher_thread(), "Can only be set by WatcherThread"); aoqi@0: _crash_protection = crash_protection; aoqi@0: } aoqi@0: aoqi@0: bool has_crash_protection() const { return _crash_protection != NULL; } aoqi@0: os::WatcherThreadCrashProtection* crash_protection() const { return _crash_protection; } aoqi@0: aoqi@0: private: aoqi@0: int sleep() const; aoqi@0: }; aoqi@0: aoqi@0: aoqi@0: class CompilerThread; aoqi@0: aoqi@0: typedef void (*ThreadFunction)(JavaThread*, TRAPS); aoqi@0: aoqi@0: class JavaThread: public Thread { aoqi@0: friend class VMStructs; aoqi@0: private: aoqi@0: JavaThread* _next; // The next thread in the Threads list aoqi@0: oop _threadObj; // The Java level thread object aoqi@0: aoqi@0: #ifdef ASSERT aoqi@0: private: aoqi@0: int _java_call_counter; aoqi@0: aoqi@0: public: aoqi@0: int java_call_counter() { return _java_call_counter; } aoqi@0: void inc_java_call_counter() { _java_call_counter++; } aoqi@0: void dec_java_call_counter() { aoqi@0: assert(_java_call_counter > 0, "Invalid nesting of JavaCallWrapper"); aoqi@0: _java_call_counter--; aoqi@0: } aoqi@0: private: // restore original namespace restriction aoqi@0: #endif // ifdef ASSERT aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: public: aoqi@0: enum { aoqi@0: jump_ring_buffer_size = 16 aoqi@0: }; aoqi@0: private: // restore original namespace restriction aoqi@0: #endif aoqi@0: aoqi@0: JavaFrameAnchor _anchor; // Encapsulation of current java frame and it state aoqi@0: aoqi@0: ThreadFunction _entry_point; aoqi@0: aoqi@0: JNIEnv _jni_environment; aoqi@0: aoqi@0: // Deopt support aoqi@0: DeoptResourceMark* _deopt_mark; // Holds special ResourceMark for deoptimization aoqi@0: aoqi@0: intptr_t* _must_deopt_id; // id of frame that needs to be deopted once we aoqi@0: // transition out of native aoqi@0: nmethod* _deopt_nmethod; // nmethod that is currently being deoptimized aoqi@0: vframeArray* _vframe_array_head; // Holds the heap of the active vframeArrays aoqi@0: vframeArray* _vframe_array_last; // Holds last vFrameArray we popped aoqi@0: // Because deoptimization is lazy we must save jvmti requests to set locals aoqi@0: // in compiled frames until we deoptimize and we have an interpreter frame. aoqi@0: // This holds the pointer to array (yeah like there might be more than one) of aoqi@0: // description of compiled vframes that have locals that need to be updated. aoqi@0: GrowableArray* _deferred_locals_updates; aoqi@0: aoqi@0: // Handshake value for fixing 6243940. We need a place for the i2c aoqi@0: // adapter to store the callee Method*. This value is NEVER live aoqi@0: // across a gc point so it does NOT have to be gc'd aoqi@0: // The handshake is open ended since we can't be certain that it will aoqi@0: // be NULLed. This is because we rarely ever see the race and end up aoqi@0: // in handle_wrong_method which is the backend of the handshake. See aoqi@0: // code in i2c adapters and handle_wrong_method. aoqi@0: aoqi@0: Method* _callee_target; aoqi@0: aoqi@0: // Used to pass back results to the interpreter or generated code running Java code. aoqi@0: oop _vm_result; // oop result is GC-preserved aoqi@0: Metadata* _vm_result_2; // non-oop result aoqi@0: aoqi@0: // See ReduceInitialCardMarks: this holds the precise space interval of aoqi@0: // the most recent slow path allocation for which compiled code has aoqi@0: // elided card-marks for performance along the fast-path. aoqi@0: MemRegion _deferred_card_mark; aoqi@0: aoqi@0: MonitorChunk* _monitor_chunks; // Contains the off stack monitors aoqi@0: // allocated during deoptimization aoqi@0: // and by JNI_MonitorEnter/Exit aoqi@0: aoqi@0: // Async. requests support aoqi@0: enum AsyncRequests { aoqi@0: _no_async_condition = 0, aoqi@0: _async_exception, aoqi@0: _async_unsafe_access_error aoqi@0: }; aoqi@0: AsyncRequests _special_runtime_exit_condition; // Enum indicating pending async. request aoqi@0: oop _pending_async_exception; aoqi@0: aoqi@0: // Safepoint support aoqi@0: public: // Expose _thread_state for SafeFetchInt() aoqi@0: volatile JavaThreadState _thread_state; aoqi@0: private: aoqi@0: ThreadSafepointState *_safepoint_state; // Holds information about a thread during a safepoint aoqi@0: address _saved_exception_pc; // Saved pc of instruction where last implicit exception happened aoqi@0: aoqi@0: // JavaThread termination support aoqi@0: enum TerminatedTypes { aoqi@0: _not_terminated = 0xDEAD - 2, aoqi@0: _thread_exiting, // JavaThread::exit() has been called for this thread aoqi@0: _thread_terminated, // JavaThread is removed from thread list aoqi@0: _vm_exited // JavaThread is still executing native code, but VM is terminated aoqi@0: // only VM_Exit can set _vm_exited aoqi@0: }; aoqi@0: aoqi@0: // In general a JavaThread's _terminated field transitions as follows: aoqi@0: // aoqi@0: // _not_terminated => _thread_exiting => _thread_terminated aoqi@0: // aoqi@0: // _vm_exited is a special value to cover the case of a JavaThread aoqi@0: // executing native code after the VM itself is terminated. aoqi@0: volatile TerminatedTypes _terminated; aoqi@0: // suspend/resume support aoqi@0: volatile bool _suspend_equivalent; // Suspend equivalent condition aoqi@0: jint _in_deopt_handler; // count of deoptimization aoqi@0: // handlers thread is in aoqi@0: volatile bool _doing_unsafe_access; // Thread may fault due to unsafe access aoqi@0: bool _do_not_unlock_if_synchronized; // Do not unlock the receiver of a synchronized method (since it was aoqi@0: // never locked) when throwing an exception. Used by interpreter only. aoqi@0: aoqi@0: // JNI attach states: aoqi@0: enum JNIAttachStates { aoqi@0: _not_attaching_via_jni = 1, // thread is not attaching via JNI aoqi@0: _attaching_via_jni, // thread is attaching via JNI aoqi@0: _attached_via_jni // thread has attached via JNI aoqi@0: }; aoqi@0: aoqi@0: // A regular JavaThread's _jni_attach_state is _not_attaching_via_jni. aoqi@0: // A native thread that is attaching via JNI starts with a value aoqi@0: // of _attaching_via_jni and transitions to _attached_via_jni. aoqi@0: volatile JNIAttachStates _jni_attach_state; aoqi@0: aoqi@0: public: aoqi@0: // State of the stack guard pages for this thread. aoqi@0: enum StackGuardState { aoqi@0: stack_guard_unused, // not needed aoqi@0: stack_guard_yellow_disabled,// disabled (temporarily) after stack overflow aoqi@0: stack_guard_enabled // enabled aoqi@0: }; aoqi@0: aoqi@0: private: aoqi@0: aoqi@0: StackGuardState _stack_guard_state; aoqi@0: aoqi@0: // Precompute the limit of the stack as used in stack overflow checks. aoqi@0: // We load it from here to simplify the stack overflow check in assembly. aoqi@0: address _stack_overflow_limit; aoqi@0: aoqi@0: // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is aoqi@0: // used to temp. parsing values into and out of the runtime system during exception handling for compiled aoqi@0: // code) aoqi@0: volatile oop _exception_oop; // Exception thrown in compiled code aoqi@0: volatile address _exception_pc; // PC where exception happened aoqi@0: volatile address _exception_handler_pc; // PC for handler of exception aoqi@0: volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site. aoqi@0: aoqi@0: // support for JNI critical regions aoqi@0: jint _jni_active_critical; // count of entries into JNI critical region aoqi@0: poonam@7627: // Checked JNI: function name requires exception check poonam@7627: char* _pending_jni_exception_check_fn; poonam@7627: aoqi@0: // For deadlock detection. aoqi@0: int _depth_first_number; aoqi@0: aoqi@0: // JVMTI PopFrame support aoqi@0: // This is set to popframe_pending to signal that top Java frame should be popped immediately aoqi@0: int _popframe_condition; aoqi@0: roland@7419: // If reallocation of scalar replaced objects fails, we throw OOM roland@7419: // and during exception propagation, pop the top roland@7419: // _frames_to_pop_failed_realloc frames, the ones that reference roland@7419: // failed reallocations. roland@7419: int _frames_to_pop_failed_realloc; roland@7419: aoqi@0: #ifndef PRODUCT aoqi@0: int _jmp_ring_index; aoqi@0: struct { aoqi@0: // We use intptr_t instead of address so debugger doesn't try and display strings aoqi@0: intptr_t _target; aoqi@0: intptr_t _instruction; aoqi@0: const char* _file; aoqi@0: int _line; aoqi@0: } _jmp_ring[ jump_ring_buffer_size ]; aoqi@0: #endif /* PRODUCT */ aoqi@0: aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: // Support for G1 barriers aoqi@0: aoqi@0: ObjPtrQueue _satb_mark_queue; // Thread-local log for SATB barrier. aoqi@0: // Set of all such queues. aoqi@0: static SATBMarkQueueSet _satb_mark_queue_set; aoqi@0: aoqi@0: DirtyCardQueue _dirty_card_queue; // Thread-local log for dirty cards. aoqi@0: // Set of all such queues. aoqi@0: static DirtyCardQueueSet _dirty_card_queue_set; aoqi@0: aoqi@0: void flush_barrier_queues(); aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: friend class VMThread; aoqi@0: friend class ThreadWaitTransition; aoqi@0: friend class VM_Exit; aoqi@0: aoqi@0: void initialize(); // Initialized the instance variables aoqi@0: aoqi@0: public: aoqi@0: // Constructor aoqi@0: JavaThread(bool is_attaching_via_jni = false); // for main thread and JNI attached threads aoqi@0: JavaThread(ThreadFunction entry_point, size_t stack_size = 0); aoqi@0: ~JavaThread(); aoqi@0: aoqi@0: #ifdef ASSERT aoqi@0: // verify this JavaThread hasn't be published in the Threads::list yet aoqi@0: void verify_not_published(); aoqi@0: #endif aoqi@0: aoqi@0: //JNI functiontable getter/setter for JVMTI jni function table interception API. aoqi@0: void set_jni_functions(struct JNINativeInterface_* functionTable) { aoqi@0: _jni_environment.functions = functionTable; aoqi@0: } aoqi@0: struct JNINativeInterface_* get_jni_functions() { aoqi@0: return (struct JNINativeInterface_ *)_jni_environment.functions; aoqi@0: } aoqi@0: aoqi@0: // This function is called at thread creation to allow aoqi@0: // platform specific thread variables to be initialized. aoqi@0: void cache_global_variables(); aoqi@0: aoqi@0: // Executes Shutdown.shutdown() aoqi@0: void invoke_shutdown_hooks(); aoqi@0: aoqi@0: // Cleanup on thread exit aoqi@0: enum ExitType { aoqi@0: normal_exit, aoqi@0: jni_detach aoqi@0: }; aoqi@0: void exit(bool destroy_vm, ExitType exit_type = normal_exit); aoqi@0: aoqi@0: void cleanup_failed_attach_current_thread(); aoqi@0: aoqi@0: // Testers aoqi@0: virtual bool is_Java_thread() const { return true; } aoqi@0: aoqi@0: // Thread chain operations aoqi@0: JavaThread* next() const { return _next; } aoqi@0: void set_next(JavaThread* p) { _next = p; } aoqi@0: aoqi@0: // Thread oop. threadObj() can be NULL for initial JavaThread aoqi@0: // (or for threads attached via JNI) aoqi@0: oop threadObj() const { return _threadObj; } aoqi@0: void set_threadObj(oop p) { _threadObj = p; } aoqi@0: aoqi@0: ThreadPriority java_priority() const; // Read from threadObj() aoqi@0: aoqi@0: // Prepare thread and add to priority queue. If a priority is aoqi@0: // not specified, use the priority of the thread object. Threads_lock aoqi@0: // must be held while this function is called. aoqi@0: void prepare(jobject jni_thread, ThreadPriority prio=NoPriority); sla@7107: void prepare_ext(); aoqi@0: aoqi@0: void set_saved_exception_pc(address pc) { _saved_exception_pc = pc; } aoqi@0: address saved_exception_pc() { return _saved_exception_pc; } aoqi@0: aoqi@0: aoqi@0: ThreadFunction entry_point() const { return _entry_point; } aoqi@0: aoqi@0: // Allocates a new Java level thread object for this thread. thread_name may be NULL. aoqi@0: void allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS); aoqi@0: aoqi@0: // Last frame anchor routines aoqi@0: aoqi@0: JavaFrameAnchor* frame_anchor(void) { return &_anchor; } aoqi@0: aoqi@0: // last_Java_sp aoqi@0: bool has_last_Java_frame() const { return _anchor.has_last_Java_frame(); } aoqi@0: intptr_t* last_Java_sp() const { return _anchor.last_Java_sp(); } aoqi@0: aoqi@0: // last_Java_pc aoqi@0: aoqi@0: address last_Java_pc(void) { return _anchor.last_Java_pc(); } aoqi@0: aoqi@0: // Safepoint support aoqi@0: #ifndef PPC64 aoqi@0: JavaThreadState thread_state() const { return _thread_state; } aoqi@0: void set_thread_state(JavaThreadState s) { _thread_state = s; } aoqi@0: #else aoqi@0: // Use membars when accessing volatile _thread_state. See aoqi@0: // Threads::create_vm() for size checks. goetz@6911: inline JavaThreadState thread_state() const; goetz@6911: inline void set_thread_state(JavaThreadState s); aoqi@0: #endif aoqi@0: ThreadSafepointState *safepoint_state() const { return _safepoint_state; } aoqi@0: void set_safepoint_state(ThreadSafepointState *state) { _safepoint_state = state; } aoqi@0: bool is_at_poll_safepoint() { return _safepoint_state->is_at_poll_safepoint(); } aoqi@0: aoqi@0: // thread has called JavaThread::exit() or is terminated aoqi@0: bool is_exiting() { return _terminated == _thread_exiting || is_terminated(); } aoqi@0: // thread is terminated (no longer on the threads list); we compare aoqi@0: // against the two non-terminated values so that a freed JavaThread aoqi@0: // will also be considered terminated. aoqi@0: bool is_terminated() { return _terminated != _not_terminated && _terminated != _thread_exiting; } aoqi@0: void set_terminated(TerminatedTypes t) { _terminated = t; } aoqi@0: // special for Threads::remove() which is static: aoqi@0: void set_terminated_value() { _terminated = _thread_terminated; } aoqi@0: void block_if_vm_exited(); aoqi@0: aoqi@0: bool doing_unsafe_access() { return _doing_unsafe_access; } aoqi@0: void set_doing_unsafe_access(bool val) { _doing_unsafe_access = val; } aoqi@0: aoqi@0: bool do_not_unlock_if_synchronized() { return _do_not_unlock_if_synchronized; } aoqi@0: void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; } aoqi@0: aoqi@0: // Suspend/resume support for JavaThread aoqi@0: private: aoqi@0: void set_ext_suspended() { set_suspend_flag (_ext_suspended); } aoqi@0: void clear_ext_suspended() { clear_suspend_flag(_ext_suspended); } aoqi@0: aoqi@0: public: aoqi@0: void java_suspend(); aoqi@0: void java_resume(); aoqi@0: int java_suspend_self(); aoqi@0: aoqi@0: void check_and_wait_while_suspended() { aoqi@0: assert(JavaThread::current() == this, "sanity check"); aoqi@0: aoqi@0: bool do_self_suspend; aoqi@0: do { aoqi@0: // were we externally suspended while we were waiting? aoqi@0: do_self_suspend = handle_special_suspend_equivalent_condition(); aoqi@0: if (do_self_suspend) { aoqi@0: // don't surprise the thread that suspended us by returning aoqi@0: java_suspend_self(); aoqi@0: set_suspend_equivalent(); aoqi@0: } aoqi@0: } while (do_self_suspend); aoqi@0: } aoqi@0: static void check_safepoint_and_suspend_for_native_trans(JavaThread *thread); aoqi@0: // Check for async exception in addition to safepoint and suspend request. aoqi@0: static void check_special_condition_for_native_trans(JavaThread *thread); aoqi@0: aoqi@0: // Same as check_special_condition_for_native_trans but finishes the aoqi@0: // transition into thread_in_Java mode so that it can potentially aoqi@0: // block. aoqi@0: static void check_special_condition_for_native_trans_and_transition(JavaThread *thread); aoqi@0: aoqi@0: bool is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits); aoqi@0: bool is_ext_suspend_completed_with_lock(uint32_t *bits) { aoqi@0: MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); aoqi@0: // Warning: is_ext_suspend_completed() may temporarily drop the aoqi@0: // SR_lock to allow the thread to reach a stable thread state if aoqi@0: // it is currently in a transient thread state. aoqi@0: return is_ext_suspend_completed(false /*!called_by_wait */, aoqi@0: SuspendRetryDelay, bits); aoqi@0: } aoqi@0: aoqi@0: // We cannot allow wait_for_ext_suspend_completion() to run forever or aoqi@0: // we could hang. SuspendRetryCount and SuspendRetryDelay are normally aoqi@0: // passed as the count and delay parameters. Experiments with specific aoqi@0: // calls to wait_for_ext_suspend_completion() can be done by passing aoqi@0: // other values in the code. Experiments with all calls can be done aoqi@0: // via the appropriate -XX options. aoqi@0: bool wait_for_ext_suspend_completion(int count, int delay, uint32_t *bits); aoqi@0: aoqi@0: void set_external_suspend() { set_suspend_flag (_external_suspend); } aoqi@0: void clear_external_suspend() { clear_suspend_flag(_external_suspend); } aoqi@0: aoqi@0: void set_deopt_suspend() { set_suspend_flag (_deopt_suspend); } aoqi@0: void clear_deopt_suspend() { clear_suspend_flag(_deopt_suspend); } aoqi@0: bool is_deopt_suspend() { return (_suspend_flags & _deopt_suspend) != 0; } aoqi@0: aoqi@0: bool is_external_suspend() const { aoqi@0: return (_suspend_flags & _external_suspend) != 0; aoqi@0: } aoqi@0: // Whenever a thread transitions from native to vm/java it must suspend aoqi@0: // if external|deopt suspend is present. aoqi@0: bool is_suspend_after_native() const { aoqi@0: return (_suspend_flags & (_external_suspend | _deopt_suspend) ) != 0; aoqi@0: } aoqi@0: aoqi@0: // external suspend request is completed aoqi@0: bool is_ext_suspended() const { aoqi@0: return (_suspend_flags & _ext_suspended) != 0; aoqi@0: } aoqi@0: aoqi@0: bool is_external_suspend_with_lock() const { aoqi@0: MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); aoqi@0: return is_external_suspend(); aoqi@0: } aoqi@0: aoqi@0: // Special method to handle a pending external suspend request aoqi@0: // when a suspend equivalent condition lifts. aoqi@0: bool handle_special_suspend_equivalent_condition() { aoqi@0: assert(is_suspend_equivalent(), aoqi@0: "should only be called in a suspend equivalence condition"); aoqi@0: MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); aoqi@0: bool ret = is_external_suspend(); aoqi@0: if (!ret) { aoqi@0: // not about to self-suspend so clear suspend equivalence aoqi@0: clear_suspend_equivalent(); aoqi@0: } aoqi@0: // implied else: aoqi@0: // We have a pending external suspend request so we leave the aoqi@0: // suspend_equivalent flag set until java_suspend_self() sets aoqi@0: // the ext_suspended flag and clears the suspend_equivalent aoqi@0: // flag. This insures that wait_for_ext_suspend_completion() aoqi@0: // will return consistent values. aoqi@0: return ret; aoqi@0: } aoqi@0: aoqi@0: // utility methods to see if we are doing some kind of suspension aoqi@0: bool is_being_ext_suspended() const { aoqi@0: MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); aoqi@0: return is_ext_suspended() || is_external_suspend(); aoqi@0: } aoqi@0: aoqi@0: bool is_suspend_equivalent() const { return _suspend_equivalent; } aoqi@0: aoqi@0: void set_suspend_equivalent() { _suspend_equivalent = true; }; aoqi@0: void clear_suspend_equivalent() { _suspend_equivalent = false; }; aoqi@0: aoqi@0: // Thread.stop support aoqi@0: void send_thread_stop(oop throwable); aoqi@0: AsyncRequests clear_special_runtime_exit_condition() { aoqi@0: AsyncRequests x = _special_runtime_exit_condition; aoqi@0: _special_runtime_exit_condition = _no_async_condition; aoqi@0: return x; aoqi@0: } aoqi@0: aoqi@0: // Are any async conditions present? aoqi@0: bool has_async_condition() { return (_special_runtime_exit_condition != _no_async_condition); } aoqi@0: aoqi@0: void check_and_handle_async_exceptions(bool check_unsafe_error = true); aoqi@0: aoqi@0: // these next two are also used for self-suspension and async exception support aoqi@0: void handle_special_runtime_exit_condition(bool check_asyncs = true); aoqi@0: aoqi@0: // Return true if JavaThread has an asynchronous condition or aoqi@0: // if external suspension is requested. aoqi@0: bool has_special_runtime_exit_condition() { aoqi@0: // We call is_external_suspend() last since external suspend should aoqi@0: // be less common. Because we don't use is_external_suspend_with_lock aoqi@0: // it is possible that we won't see an asynchronous external suspend aoqi@0: // request that has just gotten started, i.e., SR_lock grabbed but aoqi@0: // _external_suspend field change either not made yet or not visible aoqi@0: // yet. However, this is okay because the request is asynchronous and aoqi@0: // we will see the new flag value the next time through. It's also aoqi@0: // possible that the external suspend request is dropped after aoqi@0: // we have checked is_external_suspend(), we will recheck its value aoqi@0: // under SR_lock in java_suspend_self(). aoqi@0: return (_special_runtime_exit_condition != _no_async_condition) || aoqi@0: is_external_suspend() || is_deopt_suspend(); aoqi@0: } aoqi@0: aoqi@0: void set_pending_unsafe_access_error() { _special_runtime_exit_condition = _async_unsafe_access_error; } aoqi@0: aoqi@0: void set_pending_async_exception(oop e) { aoqi@0: _pending_async_exception = e; aoqi@0: _special_runtime_exit_condition = _async_exception; aoqi@0: set_has_async_exception(); aoqi@0: } aoqi@0: aoqi@0: // Fast-locking support aoqi@0: bool is_lock_owned(address adr) const; aoqi@0: aoqi@0: // Accessors for vframe array top aoqi@0: // The linked list of vframe arrays are sorted on sp. This means when we aoqi@0: // unpack the head must contain the vframe array to unpack. aoqi@0: void set_vframe_array_head(vframeArray* value) { _vframe_array_head = value; } aoqi@0: vframeArray* vframe_array_head() const { return _vframe_array_head; } aoqi@0: aoqi@0: // Side structure for defering update of java frame locals until deopt occurs aoqi@0: GrowableArray* deferred_locals() const { return _deferred_locals_updates; } aoqi@0: void set_deferred_locals(GrowableArray* vf) { _deferred_locals_updates = vf; } aoqi@0: aoqi@0: // These only really exist to make debugging deopt problems simpler aoqi@0: aoqi@0: void set_vframe_array_last(vframeArray* value) { _vframe_array_last = value; } aoqi@0: vframeArray* vframe_array_last() const { return _vframe_array_last; } aoqi@0: aoqi@0: // The special resourceMark used during deoptimization aoqi@0: aoqi@0: void set_deopt_mark(DeoptResourceMark* value) { _deopt_mark = value; } aoqi@0: DeoptResourceMark* deopt_mark(void) { return _deopt_mark; } aoqi@0: aoqi@0: intptr_t* must_deopt_id() { return _must_deopt_id; } aoqi@0: void set_must_deopt_id(intptr_t* id) { _must_deopt_id = id; } aoqi@0: void clear_must_deopt_id() { _must_deopt_id = NULL; } aoqi@0: aoqi@0: void set_deopt_nmethod(nmethod* nm) { _deopt_nmethod = nm; } aoqi@0: nmethod* deopt_nmethod() { return _deopt_nmethod; } aoqi@0: aoqi@0: Method* callee_target() const { return _callee_target; } aoqi@0: void set_callee_target (Method* x) { _callee_target = x; } aoqi@0: aoqi@0: // Oop results of vm runtime calls aoqi@0: oop vm_result() const { return _vm_result; } aoqi@0: void set_vm_result (oop x) { _vm_result = x; } aoqi@0: aoqi@0: Metadata* vm_result_2() const { return _vm_result_2; } aoqi@0: void set_vm_result_2 (Metadata* x) { _vm_result_2 = x; } aoqi@0: aoqi@0: MemRegion deferred_card_mark() const { return _deferred_card_mark; } aoqi@0: void set_deferred_card_mark(MemRegion mr) { _deferred_card_mark = mr; } aoqi@0: aoqi@0: // Exception handling for compiled methods aoqi@0: oop exception_oop() const { return _exception_oop; } aoqi@0: address exception_pc() const { return _exception_pc; } aoqi@0: address exception_handler_pc() const { return _exception_handler_pc; } aoqi@0: bool is_method_handle_return() const { return _is_method_handle_return == 1; } aoqi@0: aoqi@0: void set_exception_oop(oop o) { (void)const_cast(_exception_oop = o); } aoqi@0: void set_exception_pc(address a) { _exception_pc = a; } aoqi@0: void set_exception_handler_pc(address a) { _exception_handler_pc = a; } aoqi@0: void set_is_method_handle_return(bool value) { _is_method_handle_return = value ? 1 : 0; } aoqi@0: aoqi@0: void clear_exception_oop_and_pc() { aoqi@0: set_exception_oop(NULL); aoqi@0: set_exception_pc(NULL); aoqi@0: } aoqi@0: aoqi@0: // Stack overflow support aoqi@0: inline size_t stack_available(address cur_sp); aoqi@0: address stack_yellow_zone_base() aoqi@0: { return (address)(stack_base() - (stack_size() - (stack_red_zone_size() + stack_yellow_zone_size()))); } aoqi@0: size_t stack_yellow_zone_size() aoqi@0: { return StackYellowPages * os::vm_page_size(); } aoqi@0: address stack_red_zone_base() aoqi@0: { return (address)(stack_base() - (stack_size() - stack_red_zone_size())); } aoqi@0: size_t stack_red_zone_size() aoqi@0: { return StackRedPages * os::vm_page_size(); } aoqi@0: bool in_stack_yellow_zone(address a) aoqi@0: { return (a <= stack_yellow_zone_base()) && (a >= stack_red_zone_base()); } aoqi@0: bool in_stack_red_zone(address a) aoqi@0: { return (a <= stack_red_zone_base()) && (a >= (address)((intptr_t)stack_base() - stack_size())); } aoqi@0: aoqi@0: void create_stack_guard_pages(); aoqi@0: void remove_stack_guard_pages(); aoqi@0: aoqi@0: void enable_stack_yellow_zone(); aoqi@0: void disable_stack_yellow_zone(); aoqi@0: void enable_stack_red_zone(); aoqi@0: void disable_stack_red_zone(); aoqi@0: aoqi@0: inline bool stack_guard_zone_unused(); aoqi@0: inline bool stack_yellow_zone_disabled(); aoqi@0: inline bool stack_yellow_zone_enabled(); aoqi@0: aoqi@0: // Attempt to reguard the stack after a stack overflow may have occurred. aoqi@0: // Returns true if (a) guard pages are not needed on this thread, (b) the aoqi@0: // pages are already guarded, or (c) the pages were successfully reguarded. aoqi@0: // Returns false if there is not enough stack space to reguard the pages, in aoqi@0: // which case the caller should unwind a frame and try again. The argument aoqi@0: // should be the caller's (approximate) sp. aoqi@0: bool reguard_stack(address cur_sp); aoqi@0: // Similar to above but see if current stackpoint is out of the guard area aoqi@0: // and reguard if possible. aoqi@0: bool reguard_stack(void); aoqi@0: aoqi@0: address stack_overflow_limit() { return _stack_overflow_limit; } aoqi@0: void set_stack_overflow_limit() { aoqi@0: _stack_overflow_limit = _stack_base - _stack_size + aoqi@0: ((StackShadowPages + aoqi@0: StackYellowPages + aoqi@0: StackRedPages) * os::vm_page_size()); aoqi@0: } aoqi@0: aoqi@0: // Misc. accessors/mutators aoqi@0: void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; } aoqi@0: void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; } aoqi@0: bool do_not_unlock(void) { return _do_not_unlock_if_synchronized; } aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: void record_jump(address target, address instr, const char* file, int line); aoqi@0: #endif /* PRODUCT */ aoqi@0: aoqi@0: // For assembly stub generation aoqi@0: static ByteSize threadObj_offset() { return byte_offset_of(JavaThread, _threadObj ); } aoqi@0: #ifndef PRODUCT aoqi@0: static ByteSize jmp_ring_index_offset() { return byte_offset_of(JavaThread, _jmp_ring_index ); } aoqi@0: static ByteSize jmp_ring_offset() { return byte_offset_of(JavaThread, _jmp_ring ); } aoqi@0: #endif /* PRODUCT */ aoqi@0: static ByteSize jni_environment_offset() { return byte_offset_of(JavaThread, _jni_environment ); } aoqi@0: static ByteSize last_Java_sp_offset() { aoqi@0: return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_sp_offset(); aoqi@0: } aoqi@0: static ByteSize last_Java_pc_offset() { aoqi@0: return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_pc_offset(); aoqi@0: } aoqi@0: static ByteSize frame_anchor_offset() { aoqi@0: return byte_offset_of(JavaThread, _anchor); aoqi@0: } aoqi@0: static ByteSize callee_target_offset() { return byte_offset_of(JavaThread, _callee_target ); } aoqi@0: static ByteSize vm_result_offset() { return byte_offset_of(JavaThread, _vm_result ); } aoqi@0: static ByteSize vm_result_2_offset() { return byte_offset_of(JavaThread, _vm_result_2 ); } aoqi@0: static ByteSize thread_state_offset() { return byte_offset_of(JavaThread, _thread_state ); } aoqi@0: static ByteSize saved_exception_pc_offset() { return byte_offset_of(JavaThread, _saved_exception_pc ); } aoqi@0: static ByteSize osthread_offset() { return byte_offset_of(JavaThread, _osthread ); } aoqi@0: static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop ); } aoqi@0: static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc ); } aoqi@0: static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); } aoqi@0: static ByteSize stack_overflow_limit_offset() { return byte_offset_of(JavaThread, _stack_overflow_limit); } aoqi@0: static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); } aoqi@0: static ByteSize stack_guard_state_offset() { return byte_offset_of(JavaThread, _stack_guard_state ); } aoqi@0: static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags ); } aoqi@0: aoqi@0: static ByteSize do_not_unlock_if_synchronized_offset() { return byte_offset_of(JavaThread, _do_not_unlock_if_synchronized); } aoqi@0: static ByteSize should_post_on_exceptions_flag_offset() { aoqi@0: return byte_offset_of(JavaThread, _should_post_on_exceptions_flag); aoqi@0: } aoqi@0: aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: static ByteSize satb_mark_queue_offset() { return byte_offset_of(JavaThread, _satb_mark_queue); } aoqi@0: static ByteSize dirty_card_queue_offset() { return byte_offset_of(JavaThread, _dirty_card_queue); } aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: // Returns the jni environment for this thread aoqi@0: JNIEnv* jni_environment() { return &_jni_environment; } aoqi@0: aoqi@0: static JavaThread* thread_from_jni_environment(JNIEnv* env) { aoqi@0: JavaThread *thread_from_jni_env = (JavaThread*)((intptr_t)env - in_bytes(jni_environment_offset())); aoqi@0: // Only return NULL if thread is off the thread list; starting to aoqi@0: // exit should not return NULL. aoqi@0: if (thread_from_jni_env->is_terminated()) { aoqi@0: thread_from_jni_env->block_if_vm_exited(); aoqi@0: return NULL; aoqi@0: } else { aoqi@0: return thread_from_jni_env; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: // JNI critical regions. These can nest. aoqi@0: bool in_critical() { return _jni_active_critical > 0; } aoqi@0: bool in_last_critical() { return _jni_active_critical == 1; } aoqi@0: void enter_critical() { assert(Thread::current() == this || aoqi@0: Thread::current()->is_VM_thread() && SafepointSynchronize::is_synchronizing(), aoqi@0: "this must be current thread or synchronizing"); aoqi@0: _jni_active_critical++; } aoqi@0: void exit_critical() { assert(Thread::current() == this, aoqi@0: "this must be current thread"); aoqi@0: _jni_active_critical--; aoqi@0: assert(_jni_active_critical >= 0, aoqi@0: "JNI critical nesting problem?"); } aoqi@0: poonam@7627: // Checked JNI, is the programmer required to check for exceptions, specify which function name poonam@7627: bool is_pending_jni_exception_check() const { return _pending_jni_exception_check_fn != NULL; } poonam@7627: void clear_pending_jni_exception_check() { _pending_jni_exception_check_fn = NULL; } poonam@7627: const char* get_pending_jni_exception_check() const { return _pending_jni_exception_check_fn; } poonam@7627: void set_pending_jni_exception_check(const char* fn_name) { _pending_jni_exception_check_fn = (char*) fn_name; } poonam@7627: aoqi@0: // For deadlock detection aoqi@0: int depth_first_number() { return _depth_first_number; } aoqi@0: void set_depth_first_number(int dfn) { _depth_first_number = dfn; } aoqi@0: aoqi@0: private: aoqi@0: void set_monitor_chunks(MonitorChunk* monitor_chunks) { _monitor_chunks = monitor_chunks; } aoqi@0: aoqi@0: public: aoqi@0: MonitorChunk* monitor_chunks() const { return _monitor_chunks; } aoqi@0: void add_monitor_chunk(MonitorChunk* chunk); aoqi@0: void remove_monitor_chunk(MonitorChunk* chunk); aoqi@0: bool in_deopt_handler() const { return _in_deopt_handler > 0; } aoqi@0: void inc_in_deopt_handler() { _in_deopt_handler++; } aoqi@0: void dec_in_deopt_handler() { aoqi@0: assert(_in_deopt_handler > 0, "mismatched deopt nesting"); aoqi@0: if (_in_deopt_handler > 0) { // robustness aoqi@0: _in_deopt_handler--; aoqi@0: } aoqi@0: } aoqi@0: aoqi@0: private: aoqi@0: void set_entry_point(ThreadFunction entry_point) { _entry_point = entry_point; } aoqi@0: aoqi@0: public: aoqi@0: aoqi@0: // Frame iteration; calls the function f for all frames on the stack aoqi@0: void frames_do(void f(frame*, const RegisterMap*)); aoqi@0: aoqi@0: // Memory operations stefank@6973: void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); aoqi@0: aoqi@0: // Sweeper operations aoqi@0: void nmethods_do(CodeBlobClosure* cf); aoqi@0: aoqi@0: // RedefineClasses Support aoqi@0: void metadata_do(void f(Metadata*)); aoqi@0: aoqi@0: // Memory management operations aoqi@0: void gc_epilogue(); aoqi@0: void gc_prologue(); aoqi@0: aoqi@0: // Misc. operations aoqi@0: char* name() const { return (char*)get_thread_name(); } aoqi@0: void print_on(outputStream* st) const; aoqi@0: void print() const { print_on(tty); } aoqi@0: void print_value(); aoqi@0: void print_thread_state_on(outputStream* ) const PRODUCT_RETURN; aoqi@0: void print_thread_state() const PRODUCT_RETURN; aoqi@0: void print_on_error(outputStream* st, char* buf, int buflen) const; aoqi@0: void verify(); aoqi@0: const char* get_thread_name() const; aoqi@0: private: aoqi@0: // factor out low-level mechanics for use in both normal and error cases aoqi@0: const char* get_thread_name_string(char* buf = NULL, int buflen = 0) const; aoqi@0: public: aoqi@0: const char* get_threadgroup_name() const; aoqi@0: const char* get_parent_name() const; aoqi@0: aoqi@0: // Accessing frames aoqi@0: frame last_frame() { aoqi@0: _anchor.make_walkable(this); aoqi@0: return pd_last_frame(); aoqi@0: } aoqi@0: javaVFrame* last_java_vframe(RegisterMap* reg_map); aoqi@0: aoqi@0: // Returns method at 'depth' java or native frames down the stack aoqi@0: // Used for security checks aoqi@0: Klass* security_get_caller_class(int depth); aoqi@0: aoqi@0: // Print stack trace in external format aoqi@0: void print_stack_on(outputStream* st); aoqi@0: void print_stack() { print_stack_on(tty); } aoqi@0: aoqi@0: // Print stack traces in various internal formats aoqi@0: void trace_stack() PRODUCT_RETURN; aoqi@0: void trace_stack_from(vframe* start_vf) PRODUCT_RETURN; aoqi@0: void trace_frames() PRODUCT_RETURN; aoqi@0: void trace_oops() PRODUCT_RETURN; aoqi@0: aoqi@0: // Print an annotated view of the stack frames aoqi@0: void print_frame_layout(int depth = 0, bool validate_only = false) NOT_DEBUG_RETURN; aoqi@0: void validate_frame_layout() { aoqi@0: print_frame_layout(0, true); aoqi@0: } aoqi@0: aoqi@0: // Returns the number of stack frames on the stack aoqi@0: int depth() const; aoqi@0: aoqi@0: // Function for testing deoptimization aoqi@0: void deoptimize(); aoqi@0: void make_zombies(); aoqi@0: aoqi@0: void deoptimized_wrt_marked_nmethods(); aoqi@0: aoqi@0: // Profiling operation (see fprofile.cpp) aoqi@0: public: aoqi@0: bool profile_last_Java_frame(frame* fr); aoqi@0: aoqi@0: private: aoqi@0: ThreadProfiler* _thread_profiler; aoqi@0: private: aoqi@0: friend class FlatProfiler; // uses both [gs]et_thread_profiler. aoqi@0: friend class FlatProfilerTask; // uses get_thread_profiler. aoqi@0: friend class ThreadProfilerMark; // uses get_thread_profiler. aoqi@0: ThreadProfiler* get_thread_profiler() { return _thread_profiler; } aoqi@0: ThreadProfiler* set_thread_profiler(ThreadProfiler* tp) { aoqi@0: ThreadProfiler* result = _thread_profiler; aoqi@0: _thread_profiler = tp; aoqi@0: return result; aoqi@0: } aoqi@0: aoqi@0: public: aoqi@0: // Returns the running thread as a JavaThread aoqi@0: static inline JavaThread* current(); aoqi@0: aoqi@0: // Returns the active Java thread. Do not use this if you know you are calling aoqi@0: // from a JavaThread, as it's slower than JavaThread::current. If called from aoqi@0: // the VMThread, it also returns the JavaThread that instigated the VMThread's aoqi@0: // operation. You may not want that either. aoqi@0: static JavaThread* active(); aoqi@0: aoqi@0: inline CompilerThread* as_CompilerThread(); aoqi@0: aoqi@0: public: aoqi@0: virtual void run(); aoqi@0: void thread_main_inner(); aoqi@0: aoqi@0: private: aoqi@0: // PRIVILEGED STACK aoqi@0: PrivilegedElement* _privileged_stack_top; aoqi@0: GrowableArray* _array_for_gc; aoqi@0: public: aoqi@0: aoqi@0: // Returns the privileged_stack information. aoqi@0: PrivilegedElement* privileged_stack_top() const { return _privileged_stack_top; } aoqi@0: void set_privileged_stack_top(PrivilegedElement *e) { _privileged_stack_top = e; } aoqi@0: void register_array_for_gc(GrowableArray* array) { _array_for_gc = array; } aoqi@0: aoqi@0: public: aoqi@0: // Thread local information maintained by JVMTI. aoqi@0: void set_jvmti_thread_state(JvmtiThreadState *value) { _jvmti_thread_state = value; } aoqi@0: // A JvmtiThreadState is lazily allocated. This jvmti_thread_state() aoqi@0: // getter is used to get this JavaThread's JvmtiThreadState if it has aoqi@0: // one which means NULL can be returned. JvmtiThreadState::state_for() aoqi@0: // is used to get the specified JavaThread's JvmtiThreadState if it has aoqi@0: // one or it allocates a new JvmtiThreadState for the JavaThread and aoqi@0: // returns it. JvmtiThreadState::state_for() will return NULL only if aoqi@0: // the specified JavaThread is exiting. aoqi@0: JvmtiThreadState *jvmti_thread_state() const { return _jvmti_thread_state; } aoqi@0: static ByteSize jvmti_thread_state_offset() { return byte_offset_of(JavaThread, _jvmti_thread_state); } aoqi@0: void set_jvmti_get_loaded_classes_closure(JvmtiGetLoadedClassesClosure* value) { _jvmti_get_loaded_classes_closure = value; } aoqi@0: JvmtiGetLoadedClassesClosure* get_jvmti_get_loaded_classes_closure() const { return _jvmti_get_loaded_classes_closure; } aoqi@0: aoqi@0: // JVMTI PopFrame support aoqi@0: // Setting and clearing popframe_condition aoqi@0: // All of these enumerated values are bits. popframe_pending aoqi@0: // indicates that a PopFrame() has been requested and not yet been aoqi@0: // completed. popframe_processing indicates that that PopFrame() is in aoqi@0: // the process of being completed. popframe_force_deopt_reexecution_bit aoqi@0: // indicates that special handling is required when returning to a aoqi@0: // deoptimized caller. aoqi@0: enum PopCondition { aoqi@0: popframe_inactive = 0x00, aoqi@0: popframe_pending_bit = 0x01, aoqi@0: popframe_processing_bit = 0x02, aoqi@0: popframe_force_deopt_reexecution_bit = 0x04 aoqi@0: }; aoqi@0: PopCondition popframe_condition() { return (PopCondition) _popframe_condition; } aoqi@0: void set_popframe_condition(PopCondition c) { _popframe_condition = c; } aoqi@0: void set_popframe_condition_bit(PopCondition c) { _popframe_condition |= c; } aoqi@0: void clear_popframe_condition() { _popframe_condition = popframe_inactive; } aoqi@0: static ByteSize popframe_condition_offset() { return byte_offset_of(JavaThread, _popframe_condition); } aoqi@0: bool has_pending_popframe() { return (popframe_condition() & popframe_pending_bit) != 0; } aoqi@0: bool popframe_forcing_deopt_reexecution() { return (popframe_condition() & popframe_force_deopt_reexecution_bit) != 0; } aoqi@0: void clear_popframe_forcing_deopt_reexecution() { _popframe_condition &= ~popframe_force_deopt_reexecution_bit; } aoqi@0: #ifdef CC_INTERP aoqi@0: bool pop_frame_pending(void) { return ((_popframe_condition & popframe_pending_bit) != 0); } aoqi@0: void clr_pop_frame_pending(void) { _popframe_condition = popframe_inactive; } aoqi@0: bool pop_frame_in_process(void) { return ((_popframe_condition & popframe_processing_bit) != 0); } aoqi@0: void set_pop_frame_in_process(void) { _popframe_condition |= popframe_processing_bit; } aoqi@0: void clr_pop_frame_in_process(void) { _popframe_condition &= ~popframe_processing_bit; } aoqi@0: #endif aoqi@0: roland@7419: int frames_to_pop_failed_realloc() const { return _frames_to_pop_failed_realloc; } roland@7419: void set_frames_to_pop_failed_realloc(int nb) { _frames_to_pop_failed_realloc = nb; } roland@7419: void dec_frames_to_pop_failed_realloc() { _frames_to_pop_failed_realloc--; } roland@7419: aoqi@0: private: aoqi@0: // Saved incoming arguments to popped frame. aoqi@0: // Used only when popped interpreted frame returns to deoptimized frame. aoqi@0: void* _popframe_preserved_args; aoqi@0: int _popframe_preserved_args_size; aoqi@0: aoqi@0: public: aoqi@0: void popframe_preserve_args(ByteSize size_in_bytes, void* start); aoqi@0: void* popframe_preserved_args(); aoqi@0: ByteSize popframe_preserved_args_size(); aoqi@0: WordSize popframe_preserved_args_size_in_words(); aoqi@0: void popframe_free_preserved_args(); aoqi@0: aoqi@0: aoqi@0: private: aoqi@0: JvmtiThreadState *_jvmti_thread_state; aoqi@0: JvmtiGetLoadedClassesClosure* _jvmti_get_loaded_classes_closure; aoqi@0: aoqi@0: // Used by the interpreter in fullspeed mode for frame pop, method aoqi@0: // entry, method exit and single stepping support. This field is aoqi@0: // only set to non-zero by the VM_EnterInterpOnlyMode VM operation. aoqi@0: // It can be set to zero asynchronously (i.e., without a VM operation aoqi@0: // or a lock) so we have to be very careful. aoqi@0: int _interp_only_mode; aoqi@0: aoqi@0: public: aoqi@0: // used by the interpreter for fullspeed debugging support (see above) aoqi@0: static ByteSize interp_only_mode_offset() { return byte_offset_of(JavaThread, _interp_only_mode); } aoqi@0: bool is_interp_only_mode() { return (_interp_only_mode != 0); } aoqi@0: int get_interp_only_mode() { return _interp_only_mode; } aoqi@0: void increment_interp_only_mode() { ++_interp_only_mode; } aoqi@0: void decrement_interp_only_mode() { --_interp_only_mode; } aoqi@0: aoqi@0: // support for cached flag that indicates whether exceptions need to be posted for this thread aoqi@0: // if this is false, we can avoid deoptimizing when events are thrown aoqi@0: // this gets set to reflect whether jvmtiExport::post_exception_throw would actually do anything aoqi@0: private: aoqi@0: int _should_post_on_exceptions_flag; aoqi@0: aoqi@0: public: aoqi@0: int should_post_on_exceptions_flag() { return _should_post_on_exceptions_flag; } aoqi@0: void set_should_post_on_exceptions_flag(int val) { _should_post_on_exceptions_flag = val; } aoqi@0: aoqi@0: private: aoqi@0: ThreadStatistics *_thread_stat; aoqi@0: aoqi@0: public: aoqi@0: ThreadStatistics* get_thread_stat() const { return _thread_stat; } aoqi@0: aoqi@0: // Return a blocker object for which this thread is blocked parking. aoqi@0: oop current_park_blocker(); aoqi@0: aoqi@0: private: aoqi@0: static size_t _stack_size_at_create; aoqi@0: aoqi@0: public: aoqi@0: static inline size_t stack_size_at_create(void) { aoqi@0: return _stack_size_at_create; aoqi@0: } aoqi@0: static inline void set_stack_size_at_create(size_t value) { aoqi@0: _stack_size_at_create = value; aoqi@0: } aoqi@0: aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: // SATB marking queue support aoqi@0: ObjPtrQueue& satb_mark_queue() { return _satb_mark_queue; } aoqi@0: static SATBMarkQueueSet& satb_mark_queue_set() { aoqi@0: return _satb_mark_queue_set; aoqi@0: } aoqi@0: aoqi@0: // Dirty card queue support aoqi@0: DirtyCardQueue& dirty_card_queue() { return _dirty_card_queue; } aoqi@0: static DirtyCardQueueSet& dirty_card_queue_set() { aoqi@0: return _dirty_card_queue_set; aoqi@0: } aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: // This method initializes the SATB and dirty card queues before a aoqi@0: // JavaThread is added to the Java thread list. Right now, we don't aoqi@0: // have to do anything to the dirty card queue (it should have been aoqi@0: // activated when the thread was created), but we have to activate aoqi@0: // the SATB queue if the thread is created while a marking cycle is aoqi@0: // in progress. The activation / de-activation of the SATB queues at aoqi@0: // the beginning / end of a marking cycle is done during safepoints aoqi@0: // so we have to make sure this method is called outside one to be aoqi@0: // able to safely read the active field of the SATB queue set. Right aoqi@0: // now, it is called just before the thread is added to the Java aoqi@0: // thread list in the Threads::add() method. That method is holding aoqi@0: // the Threads_lock which ensures we are outside a safepoint. We aoqi@0: // cannot do the obvious and set the active field of the SATB queue aoqi@0: // when the thread is created given that, in some cases, safepoints aoqi@0: // might happen between the JavaThread constructor being called and the aoqi@0: // thread being added to the Java thread list (an example of this is aoqi@0: // when the structure for the DestroyJavaVM thread is created). aoqi@0: #if INCLUDE_ALL_GCS aoqi@0: void initialize_queues(); aoqi@0: #else // INCLUDE_ALL_GCS aoqi@0: void initialize_queues() { } aoqi@0: #endif // INCLUDE_ALL_GCS aoqi@0: aoqi@0: // Machine dependent stuff aoqi@0: #ifdef TARGET_OS_ARCH_linux_x86 aoqi@0: # include "thread_linux_x86.hpp" aoqi@0: #endif aoqi@1: #ifdef TARGET_OS_ARCH_linux_mips aoqi@1: # include "thread_linux_mips.hpp" aoqi@1: #endif aoqi@0: #ifdef TARGET_OS_ARCH_linux_sparc aoqi@0: # include "thread_linux_sparc.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_linux_zero aoqi@0: # include "thread_linux_zero.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_solaris_x86 aoqi@0: # include "thread_solaris_x86.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_solaris_sparc aoqi@0: # include "thread_solaris_sparc.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_windows_x86 aoqi@0: # include "thread_windows_x86.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_linux_arm aoqi@0: # include "thread_linux_arm.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_linux_ppc aoqi@0: # include "thread_linux_ppc.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_aix_ppc aoqi@0: # include "thread_aix_ppc.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_bsd_x86 aoqi@0: # include "thread_bsd_x86.hpp" aoqi@0: #endif aoqi@0: #ifdef TARGET_OS_ARCH_bsd_zero aoqi@0: # include "thread_bsd_zero.hpp" aoqi@0: #endif aoqi@0: aoqi@0: aoqi@0: public: aoqi@0: void set_blocked_on_compilation(bool value) { aoqi@0: _blocked_on_compilation = value; aoqi@0: } aoqi@0: aoqi@0: bool blocked_on_compilation() { aoqi@0: return _blocked_on_compilation; aoqi@0: } aoqi@0: protected: aoqi@0: bool _blocked_on_compilation; aoqi@0: aoqi@0: aoqi@0: // JSR166 per-thread parker aoqi@0: private: aoqi@0: Parker* _parker; aoqi@0: public: aoqi@0: Parker* parker() { return _parker; } aoqi@0: aoqi@0: // Biased locking support aoqi@0: private: aoqi@0: GrowableArray* _cached_monitor_info; aoqi@0: public: aoqi@0: GrowableArray* cached_monitor_info() { return _cached_monitor_info; } aoqi@0: void set_cached_monitor_info(GrowableArray* info) { _cached_monitor_info = info; } aoqi@0: aoqi@0: // clearing/querying jni attach status aoqi@0: bool is_attaching_via_jni() const { return _jni_attach_state == _attaching_via_jni; } aoqi@0: bool has_attached_via_jni() const { return is_attaching_via_jni() || _jni_attach_state == _attached_via_jni; } goetz@6911: inline void set_done_attaching_via_jni(); aoqi@0: private: aoqi@0: // This field is used to determine if a thread has claimed aoqi@0: // a par_id: it is UINT_MAX if the thread has not claimed a par_id; aoqi@0: // otherwise its value is the par_id that has been claimed. aoqi@0: uint _claimed_par_id; aoqi@0: public: aoqi@0: uint get_claimed_par_id() { return _claimed_par_id; } aoqi@0: void set_claimed_par_id(uint id) { _claimed_par_id = id;} aoqi@0: }; aoqi@0: aoqi@0: // Inline implementation of JavaThread::current aoqi@0: inline JavaThread* JavaThread::current() { aoqi@0: Thread* thread = ThreadLocalStorage::thread(); aoqi@0: assert(thread != NULL && thread->is_Java_thread(), "just checking"); aoqi@0: return (JavaThread*)thread; aoqi@0: } aoqi@0: aoqi@0: inline CompilerThread* JavaThread::as_CompilerThread() { aoqi@0: assert(is_Compiler_thread(), "just checking"); aoqi@0: return (CompilerThread*)this; aoqi@0: } aoqi@0: aoqi@0: inline bool JavaThread::stack_guard_zone_unused() { aoqi@0: return _stack_guard_state == stack_guard_unused; aoqi@0: } aoqi@0: aoqi@0: inline bool JavaThread::stack_yellow_zone_disabled() { aoqi@0: return _stack_guard_state == stack_guard_yellow_disabled; aoqi@0: } aoqi@0: aoqi@0: inline bool JavaThread::stack_yellow_zone_enabled() { aoqi@0: #ifdef ASSERT dbuck@9289: if (os::uses_stack_guard_pages() && dbuck@9289: !(DisablePrimordialThreadGuardPages && os::is_primordial_thread())) { aoqi@0: assert(_stack_guard_state != stack_guard_unused, "guard pages must be in use"); aoqi@0: } aoqi@0: #endif aoqi@0: return _stack_guard_state == stack_guard_enabled; aoqi@0: } aoqi@0: aoqi@0: inline size_t JavaThread::stack_available(address cur_sp) { aoqi@0: // This code assumes java stacks grow down aoqi@0: address low_addr; // Limit on the address for deepest stack depth aoqi@0: if ( _stack_guard_state == stack_guard_unused) { aoqi@0: low_addr = stack_base() - stack_size(); aoqi@0: } else { aoqi@0: low_addr = stack_yellow_zone_base(); aoqi@0: } aoqi@0: return cur_sp > low_addr ? cur_sp - low_addr : 0; aoqi@0: } aoqi@0: aoqi@0: // A thread used for Compilation. aoqi@0: class CompilerThread : public JavaThread { aoqi@0: friend class VMStructs; aoqi@0: private: aoqi@0: CompilerCounters* _counters; aoqi@0: aoqi@0: ciEnv* _env; aoqi@0: CompileLog* _log; aoqi@0: CompileTask* _task; aoqi@0: CompileQueue* _queue; aoqi@0: BufferBlob* _buffer_blob; aoqi@0: aoqi@0: nmethod* _scanned_nmethod; // nmethod being scanned by the sweeper aoqi@0: AbstractCompiler* _compiler; aoqi@0: aoqi@0: public: aoqi@0: aoqi@0: static CompilerThread* current(); aoqi@0: aoqi@0: CompilerThread(CompileQueue* queue, CompilerCounters* counters); aoqi@0: aoqi@0: bool is_Compiler_thread() const { return true; } aoqi@0: // Hide this compiler thread from external view. aoqi@0: bool is_hidden_from_external_view() const { return true; } aoqi@0: aoqi@0: void set_compiler(AbstractCompiler* c) { _compiler = c; } aoqi@0: AbstractCompiler* compiler() const { return _compiler; } aoqi@0: aoqi@0: CompileQueue* queue() const { return _queue; } aoqi@0: CompilerCounters* counters() const { return _counters; } aoqi@0: aoqi@0: // Get/set the thread's compilation environment. aoqi@0: ciEnv* env() { return _env; } aoqi@0: void set_env(ciEnv* env) { _env = env; } aoqi@0: aoqi@0: BufferBlob* get_buffer_blob() const { return _buffer_blob; } aoqi@0: void set_buffer_blob(BufferBlob* b) { _buffer_blob = b; }; aoqi@0: aoqi@0: // Get/set the thread's logging information aoqi@0: CompileLog* log() { return _log; } aoqi@0: void init_log(CompileLog* log) { aoqi@0: // Set once, for good. aoqi@0: assert(_log == NULL, "set only once"); aoqi@0: _log = log; aoqi@0: } aoqi@0: aoqi@0: // GC support aoqi@0: // Apply "f->do_oop" to all root oops in "this". aoqi@0: // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames stefank@6973: void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); aoqi@0: aoqi@0: #ifndef PRODUCT aoqi@0: private: aoqi@0: IdealGraphPrinter *_ideal_graph_printer; aoqi@0: public: aoqi@0: IdealGraphPrinter *ideal_graph_printer() { return _ideal_graph_printer; } aoqi@0: void set_ideal_graph_printer(IdealGraphPrinter *n) { _ideal_graph_printer = n; } aoqi@0: #endif aoqi@0: aoqi@0: // Get/set the thread's current task aoqi@0: CompileTask* task() { return _task; } aoqi@0: void set_task(CompileTask* task) { _task = task; } aoqi@0: aoqi@0: // Track the nmethod currently being scanned by the sweeper aoqi@0: void set_scanned_nmethod(nmethod* nm) { aoqi@0: assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value"); aoqi@0: _scanned_nmethod = nm; aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: inline CompilerThread* CompilerThread::current() { aoqi@0: return JavaThread::current()->as_CompilerThread(); aoqi@0: } aoqi@0: aoqi@0: aoqi@0: // The active thread queue. It also keeps track of the current used aoqi@0: // thread priorities. aoqi@0: class Threads: AllStatic { aoqi@0: friend class VMStructs; aoqi@0: private: aoqi@0: static JavaThread* _thread_list; aoqi@0: static int _number_of_threads; aoqi@0: static int _number_of_non_daemon_threads; aoqi@0: static int _return_code; aoqi@0: #ifdef ASSERT aoqi@0: static bool _vm_complete; aoqi@0: #endif aoqi@0: aoqi@0: public: aoqi@0: // Thread management aoqi@0: // force_daemon is a concession to JNI, where we may need to add a aoqi@0: // thread to the thread list before allocating its thread object aoqi@0: static void add(JavaThread* p, bool force_daemon = false); aoqi@0: static void remove(JavaThread* p); aoqi@0: static bool includes(JavaThread* p); aoqi@0: static JavaThread* first() { return _thread_list; } aoqi@0: static void threads_do(ThreadClosure* tc); aoqi@0: aoqi@0: // Initializes the vm and creates the vm thread aoqi@0: static jint create_vm(JavaVMInitArgs* args, bool* canTryAgain); aoqi@0: static void convert_vm_init_libraries_to_agents(); aoqi@0: static void create_vm_init_libraries(); aoqi@0: static void create_vm_init_agents(); aoqi@0: static void shutdown_vm_agents(); aoqi@0: static bool destroy_vm(); aoqi@0: // Supported VM versions via JNI aoqi@0: // Includes JNI_VERSION_1_1 aoqi@0: static jboolean is_supported_jni_version_including_1_1(jint version); aoqi@0: // Does not include JNI_VERSION_1_1 aoqi@0: static jboolean is_supported_jni_version(jint version); aoqi@0: aoqi@0: // Garbage collection aoqi@0: static void follow_other_roots(void f(oop*)); aoqi@0: aoqi@0: // Apply "f->do_oop" to all root oops in all threads. aoqi@0: // This version may only be called by sequential code. stefank@6973: static void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); aoqi@0: // This version may be called by sequential or parallel code. stefank@6973: static void possibly_parallel_oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf); aoqi@0: // This creates a list of GCTasks, one per thread. aoqi@0: static void create_thread_roots_tasks(GCTaskQueue* q); aoqi@0: // This creates a list of GCTasks, one per thread, for marking objects. aoqi@0: static void create_thread_roots_marking_tasks(GCTaskQueue* q); aoqi@0: aoqi@0: // Apply "f->do_oop" to roots in all threads that aoqi@0: // are part of compiled frames aoqi@0: static void compiled_frame_oops_do(OopClosure* f, CodeBlobClosure* cf); aoqi@0: aoqi@0: static void convert_hcode_pointers(); aoqi@0: static void restore_hcode_pointers(); aoqi@0: aoqi@0: // Sweeper aoqi@0: static void nmethods_do(CodeBlobClosure* cf); aoqi@0: aoqi@0: // RedefineClasses support aoqi@0: static void metadata_do(void f(Metadata*)); aoqi@0: aoqi@0: static void gc_epilogue(); aoqi@0: static void gc_prologue(); aoqi@0: #ifdef ASSERT aoqi@0: static bool is_vm_complete() { return _vm_complete; } aoqi@0: #endif aoqi@0: aoqi@0: // Verification aoqi@0: static void verify(); aoqi@0: static void print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks); aoqi@0: static void print(bool print_stacks, bool internal_format) { aoqi@0: // this function is only used by debug.cpp aoqi@0: print_on(tty, print_stacks, internal_format, false /* no concurrent lock printed */); aoqi@0: } aoqi@0: static void print_on_error(outputStream* st, Thread* current, char* buf, int buflen); aoqi@0: aoqi@0: // Get Java threads that are waiting to enter a monitor. If doLock aoqi@0: // is true, then Threads_lock is grabbed as needed. Otherwise, the aoqi@0: // VM needs to be at a safepoint. aoqi@0: static GrowableArray* get_pending_threads(int count, aoqi@0: address monitor, bool doLock); aoqi@0: aoqi@0: // Get owning Java thread from the monitor's owner field. If doLock aoqi@0: // is true, then Threads_lock is grabbed as needed. Otherwise, the aoqi@0: // VM needs to be at a safepoint. aoqi@0: static JavaThread *owning_thread_from_monitor_owner(address owner, aoqi@0: bool doLock); aoqi@0: aoqi@0: // Number of threads on the active threads list aoqi@0: static int number_of_threads() { return _number_of_threads; } aoqi@0: // Number of non-daemon threads on the active threads list aoqi@0: static int number_of_non_daemon_threads() { return _number_of_non_daemon_threads; } aoqi@0: aoqi@0: // Deoptimizes all frames tied to marked nmethods aoqi@0: static void deoptimized_wrt_marked_nmethods(); aoqi@0: sla@7107: static JavaThread* find_java_thread_from_java_tid(jlong java_tid); sla@7107: aoqi@0: }; aoqi@0: aoqi@0: aoqi@0: // Thread iterator aoqi@0: class ThreadClosure: public StackObj { aoqi@0: public: aoqi@0: virtual void do_thread(Thread* thread) = 0; aoqi@0: }; aoqi@0: aoqi@0: class SignalHandlerMark: public StackObj { aoqi@0: private: aoqi@0: Thread* _thread; aoqi@0: public: aoqi@0: SignalHandlerMark(Thread* t) { aoqi@0: _thread = t; aoqi@0: if (_thread) _thread->enter_signal_handler(); aoqi@0: } aoqi@0: ~SignalHandlerMark() { aoqi@0: if (_thread) _thread->leave_signal_handler(); aoqi@0: _thread = NULL; aoqi@0: } aoqi@0: }; aoqi@0: aoqi@0: aoqi@0: #endif // SHARE_VM_RUNTIME_THREAD_HPP