| /* |
| * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2021, Azul Systems, Inc. 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_THREAD_HPP |
| #define SHARE_RUNTIME_THREAD_HPP |
| |
| #include "jni.h" |
| #include "gc/shared/gcThreadLocalData.hpp" |
| #include "gc/shared/threadLocalAllocBuffer.hpp" |
| #include "memory/allocation.hpp" |
| #include "oops/oop.hpp" |
| #include "oops/oopHandle.hpp" |
| #include "runtime/frame.hpp" |
| #include "runtime/globals.hpp" |
| #include "runtime/handshake.hpp" |
| #include "runtime/javaFrameAnchor.hpp" |
| #include "runtime/mutexLocker.hpp" |
| #include "runtime/os.hpp" |
| #include "runtime/park.hpp" |
| #include "runtime/safepointMechanism.hpp" |
| #include "runtime/stackWatermarkSet.hpp" |
| #include "runtime/stackOverflow.hpp" |
| #include "runtime/threadHeapSampler.hpp" |
| #include "runtime/threadLocalStorage.hpp" |
| #include "runtime/threadStatisticalInfo.hpp" |
| #include "runtime/unhandledOops.hpp" |
| #include "utilities/align.hpp" |
| #include "utilities/exceptions.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/macros.hpp" |
| #if INCLUDE_JFR |
| #include "jfr/support/jfrThreadExtension.hpp" |
| #endif |
| |
| |
| class SafeThreadsListPtr; |
| class ThreadSafepointState; |
| class ThreadsList; |
| class ThreadsSMRSupport; |
| |
| class JNIHandleBlock; |
| class JvmtiRawMonitor; |
| class JvmtiSampledObjectAllocEventCollector; |
| class JvmtiThreadState; |
| class JvmtiVMObjectAllocEventCollector; |
| class OSThread; |
| class ThreadStatistics; |
| class ConcurrentLocksDump; |
| class MonitorInfo; |
| |
| class vframeArray; |
| class vframe; |
| class javaVFrame; |
| |
| class DeoptResourceMark; |
| class JvmtiDeferredUpdates; |
| |
| class ThreadClosure; |
| class ICRefillVerifier; |
| |
| class Metadata; |
| class ResourceArea; |
| |
| class OopStorage; |
| |
| DEBUG_ONLY(class ResourceMark;) |
| |
| class WorkerThread; |
| |
| class JavaThread; |
| |
| // Class hierarchy |
| // - Thread |
| // - JavaThread |
| // - various subclasses eg CompilerThread, ServiceThread |
| // - NonJavaThread |
| // - NamedThread |
| // - VMThread |
| // - ConcurrentGCThread |
| // - WorkerThread |
| // - GangWorker |
| // - WatcherThread |
| // - JfrThreadSampler |
| // - LogAsyncWriter |
| // |
| // All Thread subclasses must be either JavaThread or NonJavaThread. |
| // This means !t->is_Java_thread() iff t is a NonJavaThread, or t is |
| // a partially constructed/destroyed Thread. |
| |
| // Thread execution sequence and actions: |
| // All threads: |
| // - thread_native_entry // per-OS native entry point |
| // - stack initialization |
| // - other OS-level initialization (signal masks etc) |
| // - handshake with creating thread (if not started suspended) |
| // - this->call_run() // common shared entry point |
| // - shared common initialization |
| // - this->pre_run() // virtual per-thread-type initialization |
| // - this->run() // virtual per-thread-type "main" logic |
| // - shared common tear-down |
| // - this->post_run() // virtual per-thread-type tear-down |
| // - // 'this' no longer referenceable |
| // - OS-level tear-down (minimal) |
| // - final logging |
| // |
| // For JavaThread: |
| // - this->run() // virtual but not normally overridden |
| // - this->thread_main_inner() // extra call level to ensure correct stack calculations |
| // - this->entry_point() // set differently for each kind of JavaThread |
| |
| class Thread: public ThreadShadow { |
| friend class VMStructs; |
| friend class JVMCIVMStructs; |
| private: |
| |
| #ifndef USE_LIBRARY_BASED_TLS_ONLY |
| // Current thread is maintained as a thread-local variable |
| static THREAD_LOCAL Thread* _thr_current; |
| #endif |
| |
| // Thread local data area available to the GC. The internal |
| // structure and contents of this data area is GC-specific. |
| // Only GC and GC barrier code should access this data area. |
| GCThreadLocalData _gc_data; |
| |
| public: |
| static ByteSize gc_data_offset() { |
| return byte_offset_of(Thread, _gc_data); |
| } |
| |
| template <typename T> T* gc_data() { |
| STATIC_ASSERT(sizeof(T) <= sizeof(_gc_data)); |
| return reinterpret_cast<T*>(&_gc_data); |
| } |
| |
| // Exception handling |
| // (Note: _pending_exception and friends are in ThreadShadow) |
| //oop _pending_exception; // pending exception for current thread |
| // const char* _exception_file; // file information for exception (debugging only) |
| // int _exception_line; // line information for exception (debugging only) |
| protected: |
| |
| DEBUG_ONLY(static Thread* _starting_thread;) |
| |
| // Support for forcing alignment of thread objects for biased locking |
| void* _real_malloc_address; |
| |
| // JavaThread lifecycle support: |
| friend class SafeThreadsListPtr; // for _threads_list_ptr, cmpxchg_threads_hazard_ptr(), {dec_,inc_,}nested_threads_hazard_ptr_cnt(), {g,s}et_threads_hazard_ptr(), inc_nested_handle_cnt(), tag_hazard_ptr() access |
| friend class ScanHazardPtrGatherProtectedThreadsClosure; // for cmpxchg_threads_hazard_ptr(), get_threads_hazard_ptr(), is_hazard_ptr_tagged() access |
| friend class ScanHazardPtrGatherThreadsListClosure; // for get_threads_hazard_ptr(), untag_hazard_ptr() access |
| friend class ScanHazardPtrPrintMatchingThreadsClosure; // for get_threads_hazard_ptr(), is_hazard_ptr_tagged() access |
| friend class ThreadsSMRSupport; // for _nested_threads_hazard_ptr_cnt, _threads_hazard_ptr, _threads_list_ptr access |
| friend class ThreadsListHandleTest; // for _nested_threads_hazard_ptr_cnt, _threads_hazard_ptr, _threads_list_ptr access |
| friend class ValidateHazardPtrsClosure; // for get_threads_hazard_ptr(), untag_hazard_ptr() access |
| |
| ThreadsList* volatile _threads_hazard_ptr; |
| SafeThreadsListPtr* _threads_list_ptr; |
| ThreadsList* cmpxchg_threads_hazard_ptr(ThreadsList* exchange_value, ThreadsList* compare_value); |
| ThreadsList* get_threads_hazard_ptr() const; |
| void set_threads_hazard_ptr(ThreadsList* new_list); |
| static bool is_hazard_ptr_tagged(ThreadsList* list) { |
| return (intptr_t(list) & intptr_t(1)) == intptr_t(1); |
| } |
| static ThreadsList* tag_hazard_ptr(ThreadsList* list) { |
| return (ThreadsList*)(intptr_t(list) | intptr_t(1)); |
| } |
| static ThreadsList* untag_hazard_ptr(ThreadsList* list) { |
| return (ThreadsList*)(intptr_t(list) & ~intptr_t(1)); |
| } |
| // This field is enabled via -XX:+EnableThreadSMRStatistics: |
| uint _nested_threads_hazard_ptr_cnt; |
| void dec_nested_threads_hazard_ptr_cnt() { |
| assert(_nested_threads_hazard_ptr_cnt != 0, "mismatched {dec,inc}_nested_threads_hazard_ptr_cnt()"); |
| _nested_threads_hazard_ptr_cnt--; |
| } |
| void inc_nested_threads_hazard_ptr_cnt() { |
| _nested_threads_hazard_ptr_cnt++; |
| } |
| uint nested_threads_hazard_ptr_cnt() { |
| return _nested_threads_hazard_ptr_cnt; |
| } |
| |
| public: |
| // Is the target JavaThread protected by the calling Thread |
| // or by some other mechanism: |
| static bool is_JavaThread_protected(const JavaThread* p); |
| |
| void* operator new(size_t size) throw() { return allocate(size, true); } |
| void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { |
| return allocate(size, false); } |
| void operator delete(void* p); |
| |
| protected: |
| static void* allocate(size_t size, bool throw_excpt, MEMFLAGS flags = mtThread); |
| |
| private: |
| DEBUG_ONLY(bool _suspendible_thread;) |
| |
| public: |
| // Determines if a heap allocation failure will be retried |
| // (e.g., by deoptimizing and re-executing in the interpreter). |
| // In this case, the failed allocation must raise |
| // Universe::out_of_memory_error_retry() and omit side effects |
| // such as JVMTI events and handling -XX:+HeapDumpOnOutOfMemoryError |
| // and -XX:OnOutOfMemoryError. |
| virtual bool in_retryable_allocation() const { return false; } |
| |
| #ifdef ASSERT |
| void set_suspendible_thread() { |
| _suspendible_thread = true; |
| } |
| |
| void clear_suspendible_thread() { |
| _suspendible_thread = false; |
| } |
| |
| bool is_suspendible_thread() { return _suspendible_thread; } |
| #endif |
| |
| private: |
| // Active_handles points to a block of handles |
| JNIHandleBlock* _active_handles; |
| |
| // One-element thread local free list |
| JNIHandleBlock* _free_handle_block; |
| |
| // Point to the last handle mark |
| HandleMark* _last_handle_mark; |
| |
| // Claim value for parallel iteration over threads. |
| uintx _threads_do_token; |
| |
| // Support for GlobalCounter |
| private: |
| volatile uintx _rcu_counter; |
| public: |
| volatile uintx* get_rcu_counter() { |
| return &_rcu_counter; |
| } |
| |
| public: |
| void set_last_handle_mark(HandleMark* mark) { _last_handle_mark = mark; } |
| HandleMark* last_handle_mark() const { return _last_handle_mark; } |
| private: |
| |
| #ifdef ASSERT |
| ICRefillVerifier* _missed_ic_stub_refill_verifier; |
| |
| public: |
| ICRefillVerifier* missed_ic_stub_refill_verifier() { |
| return _missed_ic_stub_refill_verifier; |
| } |
| |
| void set_missed_ic_stub_refill_verifier(ICRefillVerifier* verifier) { |
| _missed_ic_stub_refill_verifier = verifier; |
| } |
| #endif // ASSERT |
| |
| private: |
| // Used by SkipGCALot class. |
| NOT_PRODUCT(bool _skip_gcalot;) // Should we elide gc-a-lot? |
| |
| friend class GCLocker; |
| |
| private: |
| ThreadLocalAllocBuffer _tlab; // Thread-local eden |
| jlong _allocated_bytes; // Cumulative number of bytes allocated on |
| // the Java heap |
| ThreadHeapSampler _heap_sampler; // For use when sampling the memory. |
| |
| ThreadStatisticalInfo _statistical_info; // Statistics about the thread |
| |
| JFR_ONLY(DEFINE_THREAD_LOCAL_FIELD_JFR;) // Thread-local data for jfr |
| |
| JvmtiRawMonitor* _current_pending_raw_monitor; // JvmtiRawMonitor this thread |
| // is waiting to lock |
| public: |
| // Constructor |
| Thread(); |
| virtual ~Thread() = 0; // Thread is abstract. |
| |
| // Manage Thread::current() |
| void initialize_thread_current(); |
| static void clear_thread_current(); // TLS cleanup needed before threads terminate |
| |
| protected: |
| // To be implemented by children. |
| virtual void run() = 0; |
| virtual void pre_run() = 0; |
| virtual void post_run() = 0; // Note: Thread must not be deleted prior to calling this! |
| |
| #ifdef ASSERT |
| enum RunState { |
| PRE_CALL_RUN, |
| CALL_RUN, |
| PRE_RUN, |
| RUN, |
| POST_RUN |
| // POST_CALL_RUN - can't define this one as 'this' may be deleted when we want to set it |
| }; |
| RunState _run_state; // for lifecycle checks |
| #endif |
| |
| |
| public: |
| // invokes <ChildThreadClass>::run(), with common preparations and cleanups. |
| void call_run(); |
| |
| // Testers |
| virtual bool is_VM_thread() const { return false; } |
| virtual bool is_Java_thread() const { return false; } |
| virtual bool is_Compiler_thread() const { return false; } |
| virtual bool is_Code_cache_sweeper_thread() const { return false; } |
| virtual bool is_service_thread() const { return false; } |
| virtual bool is_monitor_deflation_thread() const { return false; } |
| virtual bool is_hidden_from_external_view() const { return false; } |
| virtual bool is_jvmti_agent_thread() const { return false; } |
| // True iff the thread can perform GC operations at a safepoint. |
| // Generally will be true only of VM thread and parallel GC WorkGang |
| // threads. |
| virtual bool is_GC_task_thread() const { return false; } |
| virtual bool is_Watcher_thread() const { return false; } |
| virtual bool is_ConcurrentGC_thread() const { return false; } |
| virtual bool is_Named_thread() const { return false; } |
| virtual bool is_Worker_thread() const { return false; } |
| virtual bool is_JfrSampler_thread() const { return false; } |
| |
| // Can this thread make Java upcalls |
| virtual bool can_call_java() const { return false; } |
| |
| // Is this a JavaThread that is on the VM's current ThreadsList? |
| // If so it must participate in the safepoint protocol. |
| virtual bool is_active_Java_thread() const { return false; } |
| |
| // Casts |
| inline JavaThread* as_Java_thread(); |
| inline const JavaThread* as_Java_thread() const; |
| |
| virtual char* name() const { return (char*)"Unknown thread"; } |
| |
| // Returns the current thread (ASSERTS if NULL) |
| static inline Thread* current(); |
| // Returns the current thread, or NULL if not attached |
| static inline Thread* current_or_null(); |
| // Returns the current thread, or NULL if not attached, and is |
| // safe for use from signal-handlers |
| static inline Thread* current_or_null_safe(); |
| |
| // Common thread operations |
| #ifdef ASSERT |
| static void check_for_dangling_thread_pointer(Thread *thread); |
| #endif |
| static void set_priority(Thread* thread, ThreadPriority priority); |
| static ThreadPriority get_priority(const Thread* const thread); |
| static void start(Thread* thread); |
| |
| void set_native_thread_name(const char *name) { |
| assert(Thread::current() == this, "set_native_thread_name can only be called on the current thread"); |
| os::set_native_thread_name(name); |
| } |
| |
| // Support for Unhandled Oop detection |
| // Add the field for both, fastdebug and debug, builds to keep |
| // Thread's fields layout the same. |
| // Note: CHECK_UNHANDLED_OOPS is defined only for fastdebug build. |
| #ifdef CHECK_UNHANDLED_OOPS |
| private: |
| UnhandledOops* _unhandled_oops; |
| #elif defined(ASSERT) |
| private: |
| void* _unhandled_oops; |
| #endif |
| #ifdef CHECK_UNHANDLED_OOPS |
| public: |
| UnhandledOops* unhandled_oops() { return _unhandled_oops; } |
| // Mark oop safe for gc. It may be stack allocated but won't move. |
| void allow_unhandled_oop(oop *op) { |
| if (CheckUnhandledOops) unhandled_oops()->allow_unhandled_oop(op); |
| } |
| // Clear oops at safepoint so crashes point to unhandled oop violator |
| void clear_unhandled_oops() { |
| if (CheckUnhandledOops) unhandled_oops()->clear_unhandled_oops(); |
| } |
| #endif // CHECK_UNHANDLED_OOPS |
| |
| public: |
| #ifndef PRODUCT |
| bool skip_gcalot() { return _skip_gcalot; } |
| void set_skip_gcalot(bool v) { _skip_gcalot = v; } |
| #endif |
| |
| // Resource area |
| ResourceArea* resource_area() const { return _resource_area; } |
| void set_resource_area(ResourceArea* area) { _resource_area = area; } |
| |
| OSThread* osthread() const { return _osthread; } |
| void set_osthread(OSThread* thread) { _osthread = thread; } |
| |
| // JNI handle support |
| JNIHandleBlock* active_handles() const { return _active_handles; } |
| void set_active_handles(JNIHandleBlock* block) { _active_handles = block; } |
| JNIHandleBlock* free_handle_block() const { return _free_handle_block; } |
| void set_free_handle_block(JNIHandleBlock* block) { _free_handle_block = block; } |
| |
| // Internal handle support |
| HandleArea* handle_area() const { return _handle_area; } |
| void set_handle_area(HandleArea* area) { _handle_area = area; } |
| |
| GrowableArray<Metadata*>* metadata_handles() const { return _metadata_handles; } |
| void set_metadata_handles(GrowableArray<Metadata*>* handles){ _metadata_handles = handles; } |
| |
| // Thread-Local Allocation Buffer (TLAB) support |
| ThreadLocalAllocBuffer& tlab() { return _tlab; } |
| void initialize_tlab(); |
| |
| jlong allocated_bytes() { return _allocated_bytes; } |
| void set_allocated_bytes(jlong value) { _allocated_bytes = value; } |
| void incr_allocated_bytes(jlong size) { _allocated_bytes += size; } |
| inline jlong cooked_allocated_bytes(); |
| |
| ThreadHeapSampler& heap_sampler() { return _heap_sampler; } |
| |
| ThreadStatisticalInfo& statistical_info() { return _statistical_info; } |
| |
| JFR_ONLY(DEFINE_THREAD_LOCAL_ACCESSOR_JFR;) |
| |
| // For tracking the Jvmti raw monitor the thread is pending on. |
| JvmtiRawMonitor* current_pending_raw_monitor() { |
| return _current_pending_raw_monitor; |
| } |
| void set_current_pending_raw_monitor(JvmtiRawMonitor* monitor) { |
| _current_pending_raw_monitor = monitor; |
| } |
| |
| // GC support |
| // Apply "f->do_oop" to all root oops in "this". |
| // Used by JavaThread::oops_do. |
| // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames |
| virtual void oops_do_no_frames(OopClosure* f, CodeBlobClosure* cf); |
| virtual void oops_do_frames(OopClosure* f, CodeBlobClosure* cf) {} |
| void oops_do(OopClosure* f, CodeBlobClosure* cf); |
| |
| // Handles the parallel case for claim_threads_do. |
| private: |
| bool claim_par_threads_do(uintx claim_token); |
| public: |
| // Requires that "claim_token" is that of the current iteration. |
| // If "is_par" is false, sets the token of "this" to |
| // "claim_token", and returns "true". If "is_par" is true, |
| // uses an atomic instruction to set the current thread's token to |
| // "claim_token", if it is not already. Returns "true" iff the |
| // calling thread does the update, this indicates that the calling thread |
| // has claimed the thread in the current iteration. |
| bool claim_threads_do(bool is_par, uintx claim_token) { |
| if (!is_par) { |
| _threads_do_token = claim_token; |
| return true; |
| } else { |
| return claim_par_threads_do(claim_token); |
| } |
| } |
| |
| uintx threads_do_token() const { return _threads_do_token; } |
| |
| // jvmtiRedefineClasses support |
| void metadata_handles_do(void f(Metadata*)); |
| |
| private: |
| // Check if address is within the given range of this thread's |
| // stack: stack_base() > adr >/>= limit |
| // The check is inclusive of limit if passed true, else exclusive. |
| bool is_in_stack_range(address adr, address limit, bool inclusive) const { |
| assert(stack_base() > limit && limit >= stack_end(), "limit is outside of stack"); |
| return stack_base() > adr && (inclusive ? adr >= limit : adr > limit); |
| } |
| |
| public: |
| // Used by fast lock support |
| virtual bool is_lock_owned(address adr) const; |
| |
| // Check if address is within the given range of this thread's |
| // stack: stack_base() > adr >= limit |
| bool is_in_stack_range_incl(address adr, address limit) const { |
| return is_in_stack_range(adr, limit, true); |
| } |
| |
| // Check if address is within the given range of this thread's |
| // stack: stack_base() > adr > limit |
| bool is_in_stack_range_excl(address adr, address limit) const { |
| return is_in_stack_range(adr, limit, false); |
| } |
| |
| // Check if address is in the stack mapped to this thread. Used mainly in |
| // error reporting (so has to include guard zone) and frame printing. |
| // Expects _stack_base to be initialized - checked with assert. |
| bool is_in_full_stack_checked(address adr) const { |
| return is_in_stack_range_incl(adr, stack_end()); |
| } |
| |
| // Like is_in_full_stack_checked but without the assertions as this |
| // may be called in a thread before _stack_base is initialized. |
| bool is_in_full_stack(address adr) const { |
| address stack_end = _stack_base - _stack_size; |
| return _stack_base > adr && adr >= stack_end; |
| } |
| |
| // Check if address is in the live stack of this thread (not just for locks). |
| // Warning: can only be called by the current thread on itself. |
| bool is_in_live_stack(address adr) const { |
| assert(Thread::current() == this, "is_in_live_stack can only be called from current thread"); |
| return is_in_stack_range_incl(adr, os::current_stack_pointer()); |
| } |
| |
| // Sets this thread as starting thread. Returns failure if thread |
| // creation fails due to lack of memory, too many threads etc. |
| bool set_as_starting_thread(); |
| |
| protected: |
| // OS data associated with the thread |
| OSThread* _osthread; // Platform-specific thread information |
| |
| // Thread local resource area for temporary allocation within the VM |
| ResourceArea* _resource_area; |
| |
| DEBUG_ONLY(ResourceMark* _current_resource_mark;) |
| |
| // Thread local handle area for allocation of handles within the VM |
| HandleArea* _handle_area; |
| GrowableArray<Metadata*>* _metadata_handles; |
| |
| // Support for stack overflow handling, get_thread, etc. |
| address _stack_base; |
| size_t _stack_size; |
| int _lgrp_id; |
| |
| public: |
| // Stack overflow support |
| address stack_base() const { assert(_stack_base != NULL,"Sanity check"); return _stack_base; } |
| void set_stack_base(address base) { _stack_base = base; } |
| size_t stack_size() const { return _stack_size; } |
| void set_stack_size(size_t size) { _stack_size = size; } |
| address stack_end() const { return stack_base() - stack_size(); } |
| void record_stack_base_and_size(); |
| void register_thread_stack_with_NMT() NOT_NMT_RETURN; |
| void unregister_thread_stack_with_NMT() NOT_NMT_RETURN; |
| |
| int lgrp_id() const { return _lgrp_id; } |
| void set_lgrp_id(int value) { _lgrp_id = value; } |
| |
| // Printing |
| void print_on(outputStream* st, bool print_extended_info) const; |
| virtual void print_on(outputStream* st) const { print_on(st, false); } |
| void print() const; |
| virtual void print_on_error(outputStream* st, char* buf, int buflen) const; |
| void print_value_on(outputStream* st) const; |
| |
| // Debug-only code |
| #ifdef ASSERT |
| private: |
| // Deadlock detection support for Mutex locks. List of locks own by thread. |
| Mutex* _owned_locks; |
| // Mutex::set_owner_implementation is the only place where _owned_locks is modified, |
| // thus the friendship |
| friend class Mutex; |
| friend class Monitor; |
| |
| public: |
| void print_owned_locks_on(outputStream* st) const; |
| void print_owned_locks() const { print_owned_locks_on(tty); } |
| Mutex* owned_locks() const { return _owned_locks; } |
| bool owns_locks() const { return owned_locks() != NULL; } |
| |
| // Deadlock detection |
| ResourceMark* current_resource_mark() { return _current_resource_mark; } |
| void set_current_resource_mark(ResourceMark* rm) { _current_resource_mark = rm; } |
| #endif // ASSERT |
| |
| private: |
| volatile int _jvmti_env_iteration_count; |
| |
| public: |
| void entering_jvmti_env_iteration() { ++_jvmti_env_iteration_count; } |
| void leaving_jvmti_env_iteration() { --_jvmti_env_iteration_count; } |
| bool is_inside_jvmti_env_iteration() { return _jvmti_env_iteration_count > 0; } |
| |
| // Code generation |
| static ByteSize exception_file_offset() { return byte_offset_of(Thread, _exception_file); } |
| static ByteSize exception_line_offset() { return byte_offset_of(Thread, _exception_line); } |
| static ByteSize active_handles_offset() { return byte_offset_of(Thread, _active_handles); } |
| |
| static ByteSize stack_base_offset() { return byte_offset_of(Thread, _stack_base); } |
| static ByteSize stack_size_offset() { return byte_offset_of(Thread, _stack_size); } |
| |
| static ByteSize tlab_start_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::start_offset(); } |
| static ByteSize tlab_end_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::end_offset(); } |
| static ByteSize tlab_top_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::top_offset(); } |
| static ByteSize tlab_pf_top_offset() { return byte_offset_of(Thread, _tlab) + ThreadLocalAllocBuffer::pf_top_offset(); } |
| |
| static ByteSize allocated_bytes_offset() { return byte_offset_of(Thread, _allocated_bytes); } |
| |
| JFR_ONLY(DEFINE_THREAD_LOCAL_OFFSET_JFR;) |
| |
| public: |
| ParkEvent * volatile _ParkEvent; // for Object monitors, JVMTI raw monitors, |
| // and ObjectSynchronizer::read_stable_mark |
| |
| // Termination indicator used by the signal handler. |
| // _ParkEvent is just a convenient field we can NULL out after setting the JavaThread termination state |
| // (which can't itself be read from the signal handler if a signal hits during the Thread destructor). |
| bool has_terminated() { return Atomic::load(&_ParkEvent) == NULL; }; |
| |
| jint _hashStateW; // Marsaglia Shift-XOR thread-local RNG |
| jint _hashStateX; // thread-specific hashCode generator state |
| jint _hashStateY; |
| jint _hashStateZ; |
| |
| // Low-level leaf-lock primitives used to implement synchronization. |
| // Not for general synchronization use. |
| static void SpinAcquire(volatile int * Lock, const char * Name); |
| static void SpinRelease(volatile int * Lock); |
| |
| #if defined(__APPLE__) && defined(AARCH64) |
| private: |
| DEBUG_ONLY(bool _wx_init); |
| WXMode _wx_state; |
| public: |
| void init_wx(); |
| WXMode enable_wx(WXMode new_state); |
| |
| void assert_wx_state(WXMode expected) { |
| assert(_wx_state == expected, "wrong state"); |
| } |
| #endif // __APPLE__ && AARCH64 |
| }; |
| |
| // Inline implementation of Thread::current() |
| inline Thread* Thread::current() { |
| Thread* current = current_or_null(); |
| assert(current != NULL, "Thread::current() called on detached thread"); |
| return current; |
| } |
| |
| inline Thread* Thread::current_or_null() { |
| #ifndef USE_LIBRARY_BASED_TLS_ONLY |
| return _thr_current; |
| #else |
| if (ThreadLocalStorage::is_initialized()) { |
| return ThreadLocalStorage::thread(); |
| } |
| return NULL; |
| #endif |
| } |
| |
| inline Thread* Thread::current_or_null_safe() { |
| if (ThreadLocalStorage::is_initialized()) { |
| return ThreadLocalStorage::thread(); |
| } |
| return NULL; |
| } |
| |
| class CompilerThread; |
| |
| typedef void (*ThreadFunction)(JavaThread*, TRAPS); |
| |
| class JavaThread: public Thread { |
| friend class VMStructs; |
| friend class JVMCIVMStructs; |
| friend class WhiteBox; |
| friend class ThreadsSMRSupport; // to access _threadObj for exiting_threads_oops_do |
| friend class HandshakeState; |
| private: |
| bool _on_thread_list; // Is set when this JavaThread is added to the Threads list |
| OopHandle _threadObj; // The Java level thread object |
| |
| #ifdef ASSERT |
| private: |
| int _java_call_counter; |
| |
| public: |
| int java_call_counter() { return _java_call_counter; } |
| void inc_java_call_counter() { _java_call_counter++; } |
| void dec_java_call_counter() { |
| assert(_java_call_counter > 0, "Invalid nesting of JavaCallWrapper"); |
| _java_call_counter--; |
| } |
| private: // restore original namespace restriction |
| #endif // ifdef ASSERT |
| |
| JavaFrameAnchor _anchor; // Encapsulation of current java frame and it state |
| |
| ThreadFunction _entry_point; |
| |
| JNIEnv _jni_environment; |
| |
| // Deopt support |
| DeoptResourceMark* _deopt_mark; // Holds special ResourceMark for deoptimization |
| |
| CompiledMethod* _deopt_nmethod; // CompiledMethod that is currently being deoptimized |
| vframeArray* _vframe_array_head; // Holds the heap of the active vframeArrays |
| vframeArray* _vframe_array_last; // Holds last vFrameArray we popped |
| // Holds updates by JVMTI agents for compiled frames that cannot be performed immediately. They |
| // will be carried out as soon as possible which, in most cases, is just before deoptimization of |
| // the frame, when control returns to it. |
| JvmtiDeferredUpdates* _jvmti_deferred_updates; |
| |
| // Handshake value for fixing 6243940. We need a place for the i2c |
| // adapter to store the callee Method*. This value is NEVER live |
| // across a gc point so it does NOT have to be gc'd |
| // The handshake is open ended since we can't be certain that it will |
| // be NULLed. This is because we rarely ever see the race and end up |
| // in handle_wrong_method which is the backend of the handshake. See |
| // code in i2c adapters and handle_wrong_method. |
| |
| Method* _callee_target; |
| |
| // Used to pass back results to the interpreter or generated code running Java code. |
| oop _vm_result; // oop result is GC-preserved |
| Metadata* _vm_result_2; // non-oop result |
| |
| // See ReduceInitialCardMarks: this holds the precise space interval of |
| // the most recent slow path allocation for which compiled code has |
| // elided card-marks for performance along the fast-path. |
| MemRegion _deferred_card_mark; |
| |
| ObjectMonitor* volatile _current_pending_monitor; // ObjectMonitor this thread is waiting to lock |
| bool _current_pending_monitor_is_from_java; // locking is from Java code |
| ObjectMonitor* volatile _current_waiting_monitor; // ObjectMonitor on which this thread called Object.wait() |
| public: |
| volatile intptr_t _Stalled; |
| |
| // For tracking the heavyweight monitor the thread is pending on. |
| ObjectMonitor* current_pending_monitor() { |
| // Use Atomic::load() to prevent data race between concurrent modification and |
| // concurrent readers, e.g. ThreadService::get_current_contended_monitor(). |
| // Especially, reloading pointer from thread after NULL check must be prevented. |
| return Atomic::load(&_current_pending_monitor); |
| } |
| void set_current_pending_monitor(ObjectMonitor* monitor) { |
| Atomic::store(&_current_pending_monitor, monitor); |
| } |
| void set_current_pending_monitor_is_from_java(bool from_java) { |
| _current_pending_monitor_is_from_java = from_java; |
| } |
| bool current_pending_monitor_is_from_java() { |
| return _current_pending_monitor_is_from_java; |
| } |
| ObjectMonitor* current_waiting_monitor() { |
| // See the comment in current_pending_monitor() above. |
| return Atomic::load(&_current_waiting_monitor); |
| } |
| void set_current_waiting_monitor(ObjectMonitor* monitor) { |
| Atomic::store(&_current_waiting_monitor, monitor); |
| } |
| |
| private: |
| MonitorChunk* _monitor_chunks; // Contains the off stack monitors |
| // allocated during deoptimization |
| // and by JNI_MonitorEnter/Exit |
| |
| enum SuspendFlags { |
| // NOTE: avoid using the sign-bit as cc generates different test code |
| // when the sign-bit is used, and sometimes incorrectly - see CR 6398077 |
| _has_async_exception = 0x00000001U, // there is a pending async exception |
| _trace_flag = 0x00000004U, // call tracing backend |
| _obj_deopt = 0x00000008U // suspend for object reallocation and relocking for JVMTI agent |
| }; |
| |
| // various suspension related flags - atomically updated |
| // overloaded with async exceptions so that we do a single check when transitioning from native->Java |
| volatile uint32_t _suspend_flags; |
| |
| inline void set_suspend_flag(SuspendFlags f); |
| inline void clear_suspend_flag(SuspendFlags f); |
| |
| public: |
| inline void set_trace_flag(); |
| inline void clear_trace_flag(); |
| inline void set_obj_deopt_flag(); |
| inline void clear_obj_deopt_flag(); |
| bool is_trace_suspend() { return (_suspend_flags & _trace_flag) != 0; } |
| bool is_obj_deopt_suspend() { return (_suspend_flags & _obj_deopt) != 0; } |
| |
| // Asynchronous exceptions support |
| private: |
| enum AsyncExceptionCondition { |
| _no_async_condition = 0, |
| _async_exception, |
| _async_unsafe_access_error |
| }; |
| AsyncExceptionCondition _async_exception_condition; |
| oop _pending_async_exception; |
| |
| void set_async_exception_condition(AsyncExceptionCondition aec) { _async_exception_condition = aec; } |
| AsyncExceptionCondition clear_async_exception_condition() { |
| AsyncExceptionCondition x = _async_exception_condition; |
| _async_exception_condition = _no_async_condition; |
| return x; |
| } |
| |
| public: |
| bool has_async_exception_condition(bool check_unsafe_access_error = true) { |
| return check_unsafe_access_error ? _async_exception_condition != _no_async_condition |
| : _async_exception_condition == _async_exception; |
| } |
| inline void set_pending_async_exception(oop e); |
| void set_pending_unsafe_access_error() { |
| // Don't overwrite an asynchronous exception sent by another thread |
| if (_async_exception_condition == _no_async_condition) { |
| set_async_exception_condition(_async_unsafe_access_error); |
| } |
| } |
| void check_and_handle_async_exceptions(); |
| // Installs a pending exception to be inserted later |
| static void send_async_exception(oop thread_oop, oop java_throwable); |
| void send_thread_stop(oop throwable); |
| |
| // Safepoint support |
| public: // Expose _thread_state for SafeFetchInt() |
| volatile JavaThreadState _thread_state; |
| private: |
| SafepointMechanism::ThreadData _poll_data; |
| ThreadSafepointState* _safepoint_state; // Holds information about a thread during a safepoint |
| address _saved_exception_pc; // Saved pc of instruction where last implicit exception happened |
| NOT_PRODUCT(bool _requires_cross_modify_fence;) // State used by VerifyCrossModifyFence |
| #ifdef ASSERT |
| // Debug support for checking if code allows safepoints or not. |
| // Safepoints in the VM can happen because of allocation, invoking a VM operation, or blocking on |
| // mutex, or blocking on an object synchronizer (Java locking). |
| // If _no_safepoint_count is non-zero, then an assertion failure will happen in any of |
| // the above cases. The class NoSafepointVerifier is used to set this counter. |
| int _no_safepoint_count; // If 0, thread allow a safepoint to happen |
| |
| public: |
| void inc_no_safepoint_count() { _no_safepoint_count++; } |
| void dec_no_safepoint_count() { _no_safepoint_count--; } |
| #endif // ASSERT |
| public: |
| // These functions check conditions before possibly going to a safepoint. |
| // including NoSafepointVerifier. |
| void check_for_valid_safepoint_state() NOT_DEBUG_RETURN; |
| void check_possible_safepoint() NOT_DEBUG_RETURN; |
| |
| #ifdef ASSERT |
| private: |
| volatile uint64_t _visited_for_critical_count; |
| |
| public: |
| void set_visited_for_critical_count(uint64_t safepoint_id) { |
| assert(_visited_for_critical_count == 0, "Must be reset before set"); |
| assert((safepoint_id & 0x1) == 1, "Must be odd"); |
| _visited_for_critical_count = safepoint_id; |
| } |
| void reset_visited_for_critical_count(uint64_t safepoint_id) { |
| assert(_visited_for_critical_count == safepoint_id, "Was not visited"); |
| _visited_for_critical_count = 0; |
| } |
| bool was_visited_for_critical_count(uint64_t safepoint_id) const { |
| return _visited_for_critical_count == safepoint_id; |
| } |
| #endif // ASSERT |
| |
| // JavaThread termination support |
| public: |
| enum TerminatedTypes { |
| _not_terminated = 0xDEAD - 2, |
| _thread_exiting, // JavaThread::exit() has been called for this thread |
| _thread_terminated, // JavaThread is removed from thread list |
| _vm_exited // JavaThread is still executing native code, but VM is terminated |
| // only VM_Exit can set _vm_exited |
| }; |
| |
| private: |
| // In general a JavaThread's _terminated field transitions as follows: |
| // |
| // _not_terminated => _thread_exiting => _thread_terminated |
| // |
| // _vm_exited is a special value to cover the case of a JavaThread |
| // executing native code after the VM itself is terminated. |
| volatile TerminatedTypes _terminated; |
| |
| jint _in_deopt_handler; // count of deoptimization |
| // handlers thread is in |
| volatile bool _doing_unsafe_access; // Thread may fault due to unsafe access |
| bool _do_not_unlock_if_synchronized; // Do not unlock the receiver of a synchronized method (since it was |
| // never locked) when throwing an exception. Used by interpreter only. |
| |
| // JNI attach states: |
| enum JNIAttachStates { |
| _not_attaching_via_jni = 1, // thread is not attaching via JNI |
| _attaching_via_jni, // thread is attaching via JNI |
| _attached_via_jni // thread has attached via JNI |
| }; |
| |
| // A regular JavaThread's _jni_attach_state is _not_attaching_via_jni. |
| // A native thread that is attaching via JNI starts with a value |
| // of _attaching_via_jni and transitions to _attached_via_jni. |
| volatile JNIAttachStates _jni_attach_state; |
| |
| |
| #if INCLUDE_JVMCI |
| // The _pending_* fields below are used to communicate extra information |
| // from an uncommon trap in JVMCI compiled code to the uncommon trap handler. |
| |
| // Communicates the DeoptReason and DeoptAction of the uncommon trap |
| int _pending_deoptimization; |
| |
| // Specifies whether the uncommon trap is to bci 0 of a synchronized method |
| // before the monitor has been acquired. |
| bool _pending_monitorenter; |
| |
| // Specifies if the DeoptReason for the last uncommon trap was Reason_transfer_to_interpreter |
| bool _pending_transfer_to_interpreter; |
| |
| // True if in a runtime call from compiled code that will deoptimize |
| // and re-execute a failed heap allocation in the interpreter. |
| bool _in_retryable_allocation; |
| |
| // An id of a speculation that JVMCI compiled code can use to further describe and |
| // uniquely identify the speculative optimization guarded by an uncommon trap. |
| // See JVMCINMethodData::SPECULATION_LENGTH_BITS for further details. |
| jlong _pending_failed_speculation; |
| |
| // These fields are mutually exclusive in terms of live ranges. |
| union { |
| // Communicates the pc at which the most recent implicit exception occurred |
| // from the signal handler to a deoptimization stub. |
| address _implicit_exception_pc; |
| |
| // Communicates an alternative call target to an i2c stub from a JavaCall . |
| address _alternate_call_target; |
| } _jvmci; |
| |
| // Support for high precision, thread sensitive counters in JVMCI compiled code. |
| jlong* _jvmci_counters; |
| |
| // Fast thread locals for use by JVMCI |
| intptr_t* _jvmci_reserved0; |
| intptr_t* _jvmci_reserved1; |
| oop _jvmci_reserved_oop0; |
| |
| public: |
| static jlong* _jvmci_old_thread_counters; |
| static void collect_counters(jlong* array, int length); |
| |
| bool resize_counters(int current_size, int new_size); |
| |
| static bool resize_all_jvmci_counters(int new_size); |
| |
| private: |
| #endif // INCLUDE_JVMCI |
| |
| StackOverflow _stack_overflow_state; |
| |
| // Compiler exception handling (NOTE: The _exception_oop is *NOT* the same as _pending_exception. It is |
| // used to temp. parsing values into and out of the runtime system during exception handling for compiled |
| // code) |
| volatile oop _exception_oop; // Exception thrown in compiled code |
| volatile address _exception_pc; // PC where exception happened |
| volatile address _exception_handler_pc; // PC for handler of exception |
| volatile int _is_method_handle_return; // true (== 1) if the current exception PC is a MethodHandle call site. |
| |
| private: |
| // support for JNI critical regions |
| jint _jni_active_critical; // count of entries into JNI critical region |
| |
| // Checked JNI: function name requires exception check |
| char* _pending_jni_exception_check_fn; |
| |
| // For deadlock detection. |
| int _depth_first_number; |
| |
| // JVMTI PopFrame support |
| // This is set to popframe_pending to signal that top Java frame should be popped immediately |
| int _popframe_condition; |
| |
| // If reallocation of scalar replaced objects fails, we throw OOM |
| // and during exception propagation, pop the top |
| // _frames_to_pop_failed_realloc frames, the ones that reference |
| // failed reallocations. |
| int _frames_to_pop_failed_realloc; |
| |
| friend class VMThread; |
| friend class ThreadWaitTransition; |
| friend class VM_Exit; |
| |
| // Stack watermark barriers. |
| StackWatermarks _stack_watermarks; |
| |
| public: |
| inline StackWatermarks* stack_watermarks() { return &_stack_watermarks; } |
| |
| public: |
| // Constructor |
| JavaThread(); // delegating constructor |
| JavaThread(bool is_attaching_via_jni); // for main thread and JNI attached threads |
| JavaThread(ThreadFunction entry_point, size_t stack_size = 0); |
| ~JavaThread(); |
| |
| #ifdef ASSERT |
| // verify this JavaThread hasn't be published in the Threads::list yet |
| void verify_not_published(); |
| #endif // ASSERT |
| |
| StackOverflow* stack_overflow_state() { return &_stack_overflow_state; } |
| |
| //JNI functiontable getter/setter for JVMTI jni function table interception API. |
| void set_jni_functions(struct JNINativeInterface_* functionTable) { |
| _jni_environment.functions = functionTable; |
| } |
| struct JNINativeInterface_* get_jni_functions() { |
| return (struct JNINativeInterface_ *)_jni_environment.functions; |
| } |
| |
| // This function is called at thread creation to allow |
| // platform specific thread variables to be initialized. |
| void cache_global_variables(); |
| |
| // Executes Shutdown.shutdown() |
| void invoke_shutdown_hooks(); |
| |
| // Cleanup on thread exit |
| enum ExitType { |
| normal_exit, |
| jni_detach |
| }; |
| void exit(bool destroy_vm, ExitType exit_type = normal_exit); |
| |
| void cleanup_failed_attach_current_thread(bool is_daemon); |
| |
| // Testers |
| virtual bool is_Java_thread() const { return true; } |
| virtual bool can_call_java() const { return true; } |
| |
| virtual bool is_active_Java_thread() const { |
| return on_thread_list() && !is_terminated(); |
| } |
| |
| // Thread oop. threadObj() can be NULL for initial JavaThread |
| // (or for threads attached via JNI) |
| oop threadObj() const; |
| void set_threadObj(oop p); |
| |
| // Prepare thread and add to priority queue. If a priority is |
| // not specified, use the priority of the thread object. Threads_lock |
| // must be held while this function is called. |
| void prepare(jobject jni_thread, ThreadPriority prio=NoPriority); |
| |
| void set_saved_exception_pc(address pc) { _saved_exception_pc = pc; } |
| address saved_exception_pc() { return _saved_exception_pc; } |
| |
| ThreadFunction entry_point() const { return _entry_point; } |
| |
| // Allocates a new Java level thread object for this thread. thread_name may be NULL. |
| void allocate_threadObj(Handle thread_group, const char* thread_name, bool daemon, TRAPS); |
| |
| // Last frame anchor routines |
| |
| JavaFrameAnchor* frame_anchor(void) { return &_anchor; } |
| |
| // last_Java_sp |
| bool has_last_Java_frame() const { return _anchor.has_last_Java_frame(); } |
| intptr_t* last_Java_sp() const { return _anchor.last_Java_sp(); } |
| |
| // last_Java_pc |
| |
| address last_Java_pc(void) { return _anchor.last_Java_pc(); } |
| |
| // Safepoint support |
| inline JavaThreadState thread_state() const; |
| inline void set_thread_state(JavaThreadState s); |
| inline void set_thread_state_fence(JavaThreadState s); // fence after setting thread state |
| inline ThreadSafepointState* safepoint_state() const; |
| inline void set_safepoint_state(ThreadSafepointState* state); |
| inline bool is_at_poll_safepoint(); |
| |
| // JavaThread termination and lifecycle support: |
| void smr_delete(); |
| bool on_thread_list() const { return _on_thread_list; } |
| void set_on_thread_list() { _on_thread_list = true; } |
| |
| // thread has called JavaThread::exit() or is terminated |
| bool is_exiting() const; |
| // thread is terminated (no longer on the threads list); we compare |
| // against the two non-terminated values so that a freed JavaThread |
| // will also be considered terminated. |
| bool check_is_terminated(TerminatedTypes l_terminated) const { |
| return l_terminated != _not_terminated && l_terminated != _thread_exiting; |
| } |
| bool is_terminated() const; |
| void set_terminated(TerminatedTypes t); |
| |
| void block_if_vm_exited(); |
| |
| bool doing_unsafe_access() { return _doing_unsafe_access; } |
| void set_doing_unsafe_access(bool val) { _doing_unsafe_access = val; } |
| |
| bool do_not_unlock_if_synchronized() { return _do_not_unlock_if_synchronized; } |
| void set_do_not_unlock_if_synchronized(bool val) { _do_not_unlock_if_synchronized = val; } |
| |
| SafepointMechanism::ThreadData* poll_data() { return &_poll_data; } |
| |
| void set_requires_cross_modify_fence(bool val) PRODUCT_RETURN NOT_PRODUCT({ _requires_cross_modify_fence = val; }) |
| |
| private: |
| DEBUG_ONLY(void verify_frame_info();) |
| |
| // Support for thread handshake operations |
| HandshakeState _handshake; |
| public: |
| HandshakeState* handshake_state() { return &_handshake; } |
| |
| // A JavaThread can always safely operate on it self and other threads |
| // can do it safely if they are the active handshaker. |
| bool is_handshake_safe_for(Thread* th) const { |
| return _handshake.active_handshaker() == th || this == th; |
| } |
| |
| // Suspend/resume support for JavaThread |
| bool java_suspend(); // higher-level suspension logic called by the public APIs |
| bool java_resume(); // higher-level resume logic called by the public APIs |
| bool is_suspended() { return _handshake.is_suspended(); } |
| |
| // Check for async exception in addition to safepoint. |
| static void check_special_condition_for_native_trans(JavaThread *thread); |
| |
| // Synchronize with another thread that is deoptimizing objects of the |
| // current thread, i.e. reverts optimizations based on escape analysis. |
| void wait_for_object_deoptimization(); |
| |
| // these next two are also used for self-suspension and async exception support |
| void handle_special_runtime_exit_condition(bool check_asyncs = true); |
| |
| // Return true if JavaThread has an asynchronous condition or |
| // if external suspension is requested. |
| bool has_special_runtime_exit_condition() { |
| return (_async_exception_condition != _no_async_condition) || |
| (_suspend_flags & (_obj_deopt JFR_ONLY(| _trace_flag))) != 0; |
| } |
| |
| // Fast-locking support |
| bool is_lock_owned(address adr) const; |
| |
| // Accessors for vframe array top |
| // The linked list of vframe arrays are sorted on sp. This means when we |
| // unpack the head must contain the vframe array to unpack. |
| void set_vframe_array_head(vframeArray* value) { _vframe_array_head = value; } |
| vframeArray* vframe_array_head() const { return _vframe_array_head; } |
| |
| // Side structure for deferring update of java frame locals until deopt occurs |
| JvmtiDeferredUpdates* deferred_updates() const { return _jvmti_deferred_updates; } |
| void set_deferred_updates(JvmtiDeferredUpdates* du) { _jvmti_deferred_updates = du; } |
| |
| // These only really exist to make debugging deopt problems simpler |
| |
| void set_vframe_array_last(vframeArray* value) { _vframe_array_last = value; } |
| vframeArray* vframe_array_last() const { return _vframe_array_last; } |
| |
| // The special resourceMark used during deoptimization |
| |
| void set_deopt_mark(DeoptResourceMark* value) { _deopt_mark = value; } |
| DeoptResourceMark* deopt_mark(void) { return _deopt_mark; } |
| |
| void set_deopt_compiled_method(CompiledMethod* nm) { _deopt_nmethod = nm; } |
| CompiledMethod* deopt_compiled_method() { return _deopt_nmethod; } |
| |
| Method* callee_target() const { return _callee_target; } |
| void set_callee_target (Method* x) { _callee_target = x; } |
| |
| // Oop results of vm runtime calls |
| oop vm_result() const { return _vm_result; } |
| void set_vm_result (oop x) { _vm_result = x; } |
| |
| Metadata* vm_result_2() const { return _vm_result_2; } |
| void set_vm_result_2 (Metadata* x) { _vm_result_2 = x; } |
| |
| MemRegion deferred_card_mark() const { return _deferred_card_mark; } |
| void set_deferred_card_mark(MemRegion mr) { _deferred_card_mark = mr; } |
| |
| #if INCLUDE_JVMCI |
| int pending_deoptimization() const { return _pending_deoptimization; } |
| jlong pending_failed_speculation() const { return _pending_failed_speculation; } |
| bool has_pending_monitorenter() const { return _pending_monitorenter; } |
| void set_pending_monitorenter(bool b) { _pending_monitorenter = b; } |
| void set_pending_deoptimization(int reason) { _pending_deoptimization = reason; } |
| void set_pending_failed_speculation(jlong failed_speculation) { _pending_failed_speculation = failed_speculation; } |
| void set_pending_transfer_to_interpreter(bool b) { _pending_transfer_to_interpreter = b; } |
| void set_jvmci_alternate_call_target(address a) { assert(_jvmci._alternate_call_target == NULL, "must be"); _jvmci._alternate_call_target = a; } |
| void set_jvmci_implicit_exception_pc(address a) { assert(_jvmci._implicit_exception_pc == NULL, "must be"); _jvmci._implicit_exception_pc = a; } |
| |
| virtual bool in_retryable_allocation() const { return _in_retryable_allocation; } |
| void set_in_retryable_allocation(bool b) { _in_retryable_allocation = b; } |
| #endif // INCLUDE_JVMCI |
| |
| // Exception handling for compiled methods |
| oop exception_oop() const; |
| address exception_pc() const { return _exception_pc; } |
| address exception_handler_pc() const { return _exception_handler_pc; } |
| bool is_method_handle_return() const { return _is_method_handle_return == 1; } |
| |
| void set_exception_oop(oop o); |
| void set_exception_pc(address a) { _exception_pc = a; } |
| void set_exception_handler_pc(address a) { _exception_handler_pc = a; } |
| void set_is_method_handle_return(bool value) { _is_method_handle_return = value ? 1 : 0; } |
| |
| void clear_exception_oop_and_pc() { |
| set_exception_oop(NULL); |
| set_exception_pc(NULL); |
| } |
| |
| // Check if address is in the usable part of the stack (excludes protected |
| // guard pages). Can be applied to any thread and is an approximation for |
| // using is_in_live_stack when the query has to happen from another thread. |
| bool is_in_usable_stack(address adr) const { |
| return is_in_stack_range_incl(adr, _stack_overflow_state.stack_reserved_zone_base()); |
| } |
| |
| // Misc. accessors/mutators |
| void set_do_not_unlock(void) { _do_not_unlock_if_synchronized = true; } |
| void clr_do_not_unlock(void) { _do_not_unlock_if_synchronized = false; } |
| bool do_not_unlock(void) { return _do_not_unlock_if_synchronized; } |
| |
| // For assembly stub generation |
| static ByteSize threadObj_offset() { return byte_offset_of(JavaThread, _threadObj); } |
| static ByteSize jni_environment_offset() { return byte_offset_of(JavaThread, _jni_environment); } |
| static ByteSize pending_jni_exception_check_fn_offset() { |
| return byte_offset_of(JavaThread, _pending_jni_exception_check_fn); |
| } |
| static ByteSize last_Java_sp_offset() { |
| return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_sp_offset(); |
| } |
| static ByteSize last_Java_pc_offset() { |
| return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_pc_offset(); |
| } |
| static ByteSize frame_anchor_offset() { |
| return byte_offset_of(JavaThread, _anchor); |
| } |
| static ByteSize callee_target_offset() { return byte_offset_of(JavaThread, _callee_target); } |
| static ByteSize vm_result_offset() { return byte_offset_of(JavaThread, _vm_result); } |
| static ByteSize vm_result_2_offset() { return byte_offset_of(JavaThread, _vm_result_2); } |
| static ByteSize thread_state_offset() { return byte_offset_of(JavaThread, _thread_state); } |
| static ByteSize polling_word_offset() { return byte_offset_of(JavaThread, _poll_data) + byte_offset_of(SafepointMechanism::ThreadData, _polling_word);} |
| static ByteSize polling_page_offset() { return byte_offset_of(JavaThread, _poll_data) + byte_offset_of(SafepointMechanism::ThreadData, _polling_page);} |
| static ByteSize saved_exception_pc_offset() { return byte_offset_of(JavaThread, _saved_exception_pc); } |
| static ByteSize osthread_offset() { return byte_offset_of(JavaThread, _osthread); } |
| #if INCLUDE_JVMCI |
| static ByteSize pending_deoptimization_offset() { return byte_offset_of(JavaThread, _pending_deoptimization); } |
| static ByteSize pending_monitorenter_offset() { return byte_offset_of(JavaThread, _pending_monitorenter); } |
| static ByteSize pending_failed_speculation_offset() { return byte_offset_of(JavaThread, _pending_failed_speculation); } |
| static ByteSize jvmci_alternate_call_target_offset() { return byte_offset_of(JavaThread, _jvmci._alternate_call_target); } |
| static ByteSize jvmci_implicit_exception_pc_offset() { return byte_offset_of(JavaThread, _jvmci._implicit_exception_pc); } |
| static ByteSize jvmci_counters_offset() { return byte_offset_of(JavaThread, _jvmci_counters); } |
| #endif // INCLUDE_JVMCI |
| static ByteSize exception_oop_offset() { return byte_offset_of(JavaThread, _exception_oop); } |
| static ByteSize exception_pc_offset() { return byte_offset_of(JavaThread, _exception_pc); } |
| static ByteSize exception_handler_pc_offset() { return byte_offset_of(JavaThread, _exception_handler_pc); } |
| static ByteSize is_method_handle_return_offset() { return byte_offset_of(JavaThread, _is_method_handle_return); } |
| |
| // StackOverflow offsets |
| static ByteSize stack_overflow_limit_offset() { |
| return byte_offset_of(JavaThread, _stack_overflow_state._stack_overflow_limit); |
| } |
| static ByteSize stack_guard_state_offset() { |
| return byte_offset_of(JavaThread, _stack_overflow_state._stack_guard_state); |
| } |
| static ByteSize reserved_stack_activation_offset() { |
| return byte_offset_of(JavaThread, _stack_overflow_state._reserved_stack_activation); |
| } |
| |
| static ByteSize suspend_flags_offset() { return byte_offset_of(JavaThread, _suspend_flags); } |
| |
| static ByteSize do_not_unlock_if_synchronized_offset() { return byte_offset_of(JavaThread, _do_not_unlock_if_synchronized); } |
| static ByteSize should_post_on_exceptions_flag_offset() { |
| return byte_offset_of(JavaThread, _should_post_on_exceptions_flag); |
| } |
| static ByteSize doing_unsafe_access_offset() { return byte_offset_of(JavaThread, _doing_unsafe_access); } |
| NOT_PRODUCT(static ByteSize requires_cross_modify_fence_offset() { return byte_offset_of(JavaThread, _requires_cross_modify_fence); }) |
| |
| // Returns the jni environment for this thread |
| JNIEnv* jni_environment() { return &_jni_environment; } |
| |
| static JavaThread* thread_from_jni_environment(JNIEnv* env) { |
| JavaThread *thread_from_jni_env = (JavaThread*)((intptr_t)env - in_bytes(jni_environment_offset())); |
| // Only return NULL if thread is off the thread list; starting to |
| // exit should not return NULL. |
| if (thread_from_jni_env->is_terminated()) { |
| thread_from_jni_env->block_if_vm_exited(); |
| return NULL; |
| } else { |
| return thread_from_jni_env; |
| } |
| } |
| |
| // JNI critical regions. These can nest. |
| bool in_critical() { return _jni_active_critical > 0; } |
| bool in_last_critical() { return _jni_active_critical == 1; } |
| inline void enter_critical(); |
| void exit_critical() { |
| assert(Thread::current() == this, "this must be current thread"); |
| _jni_active_critical--; |
| assert(_jni_active_critical >= 0, "JNI critical nesting problem?"); |
| } |
| |
| // Checked JNI: is the programmer required to check for exceptions, if so specify |
| // which function name. Returning to a Java frame should implicitly clear the |
| // pending check, this is done for Native->Java transitions (i.e. user JNI code). |
| // VM->Java transistions are not cleared, it is expected that JNI code enclosed |
| // within ThreadToNativeFromVM makes proper exception checks (i.e. VM internal). |
| bool is_pending_jni_exception_check() const { return _pending_jni_exception_check_fn != NULL; } |
| void clear_pending_jni_exception_check() { _pending_jni_exception_check_fn = NULL; } |
| const char* get_pending_jni_exception_check() const { return _pending_jni_exception_check_fn; } |
| void set_pending_jni_exception_check(const char* fn_name) { _pending_jni_exception_check_fn = (char*) fn_name; } |
| |
| // For deadlock detection |
| int depth_first_number() { return _depth_first_number; } |
| void set_depth_first_number(int dfn) { _depth_first_number = dfn; } |
| |
| private: |
| void set_monitor_chunks(MonitorChunk* monitor_chunks) { _monitor_chunks = monitor_chunks; } |
| |
| public: |
| MonitorChunk* monitor_chunks() const { return _monitor_chunks; } |
| void add_monitor_chunk(MonitorChunk* chunk); |
| void remove_monitor_chunk(MonitorChunk* chunk); |
| bool in_deopt_handler() const { return _in_deopt_handler > 0; } |
| void inc_in_deopt_handler() { _in_deopt_handler++; } |
| void dec_in_deopt_handler() { |
| assert(_in_deopt_handler > 0, "mismatched deopt nesting"); |
| if (_in_deopt_handler > 0) { // robustness |
| _in_deopt_handler--; |
| } |
| } |
| |
| private: |
| void set_entry_point(ThreadFunction entry_point) { _entry_point = entry_point; } |
| |
| public: |
| |
| // Frame iteration; calls the function f for all frames on the stack |
| void frames_do(void f(frame*, const RegisterMap*)); |
| |
| // Memory operations |
| void oops_do_frames(OopClosure* f, CodeBlobClosure* cf); |
| void oops_do_no_frames(OopClosure* f, CodeBlobClosure* cf); |
| |
| // Sweeper operations |
| virtual void nmethods_do(CodeBlobClosure* cf); |
| |
| // RedefineClasses Support |
| void metadata_do(MetadataClosure* f); |
| |
| // Debug method asserting thread states are correct during a handshake operation. |
| DEBUG_ONLY(void verify_states_for_handshake();) |
| |
| // Misc. operations |
| char* name() const { return (char*)get_thread_name(); } |
| void print_on(outputStream* st, bool print_extended_info) const; |
| void print_on(outputStream* st) const { print_on(st, false); } |
| void print() const; |
| void print_thread_state_on(outputStream*) const PRODUCT_RETURN; |
| void print_on_error(outputStream* st, char* buf, int buflen) const; |
| void print_name_on_error(outputStream* st, char* buf, int buflen) const; |
| void verify(); |
| const char* get_thread_name() const; |
| protected: |
| // factor out low-level mechanics for use in both normal and error cases |
| virtual const char* get_thread_name_string(char* buf = NULL, int buflen = 0) const; |
| public: |
| // Accessing frames |
| frame last_frame() { |
| _anchor.make_walkable(this); |
| return pd_last_frame(); |
| } |
| javaVFrame* last_java_vframe(RegisterMap* reg_map); |
| |
| // Returns method at 'depth' java or native frames down the stack |
| // Used for security checks |
| Klass* security_get_caller_class(int depth); |
| |
| // Print stack trace in external format |
| void print_stack_on(outputStream* st); |
| void print_stack() { print_stack_on(tty); } |
| |
| // Print stack traces in various internal formats |
| void trace_stack() PRODUCT_RETURN; |
| void trace_stack_from(vframe* start_vf) PRODUCT_RETURN; |
| void trace_frames() PRODUCT_RETURN; |
| |
| // Print an annotated view of the stack frames |
| void print_frame_layout(int depth = 0, bool validate_only = false) NOT_DEBUG_RETURN; |
| void validate_frame_layout() { |
| print_frame_layout(0, true); |
| } |
| |
| // Function for testing deoptimization |
| void deoptimize(); |
| void make_zombies(); |
| |
| void deoptimize_marked_methods(); |
| |
| public: |
| // Returns the running thread as a JavaThread |
| static inline JavaThread* current(); |
| // Returns the current thread as a JavaThread, or NULL if not attached |
| static inline JavaThread* current_or_null(); |
| |
| // Returns the active Java thread. Do not use this if you know you are calling |
| // from a JavaThread, as it's slower than JavaThread::current. If called from |
| // the VMThread, it also returns the JavaThread that instigated the VMThread's |
| // operation. You may not want that either. |
| static JavaThread* active(); |
| |
| protected: |
| virtual void pre_run(); |
| virtual void run(); |
| void thread_main_inner(); |
| virtual void post_run(); |
| |
| public: |
| // Thread local information maintained by JVMTI. |
| void set_jvmti_thread_state(JvmtiThreadState *value) { _jvmti_thread_state = value; } |
| // A JvmtiThreadState is lazily allocated. This jvmti_thread_state() |
| // getter is used to get this JavaThread's JvmtiThreadState if it has |
| // one which means NULL can be returned. JvmtiThreadState::state_for() |
| // is used to get the specified JavaThread's JvmtiThreadState if it has |
| // one or it allocates a new JvmtiThreadState for the JavaThread and |
| // returns it. JvmtiThreadState::state_for() will return NULL only if |
| // the specified JavaThread is exiting. |
| JvmtiThreadState *jvmti_thread_state() const { return _jvmti_thread_state; } |
| static ByteSize jvmti_thread_state_offset() { return byte_offset_of(JavaThread, _jvmti_thread_state); } |
| |
| // JVMTI PopFrame support |
| // Setting and clearing popframe_condition |
| // All of these enumerated values are bits. popframe_pending |
| // indicates that a PopFrame() has been requested and not yet been |
| // completed. popframe_processing indicates that that PopFrame() is in |
| // the process of being completed. popframe_force_deopt_reexecution_bit |
| // indicates that special handling is required when returning to a |
| // deoptimized caller. |
| enum PopCondition { |
| popframe_inactive = 0x00, |
| popframe_pending_bit = 0x01, |
| popframe_processing_bit = 0x02, |
| popframe_force_deopt_reexecution_bit = 0x04 |
| }; |
| PopCondition popframe_condition() { return (PopCondition) _popframe_condition; } |
| void set_popframe_condition(PopCondition c) { _popframe_condition = c; } |
| void set_popframe_condition_bit(PopCondition c) { _popframe_condition |= c; } |
| void clear_popframe_condition() { _popframe_condition = popframe_inactive; } |
| static ByteSize popframe_condition_offset() { return byte_offset_of(JavaThread, _popframe_condition); } |
| bool has_pending_popframe() { return (popframe_condition() & popframe_pending_bit) != 0; } |
| bool popframe_forcing_deopt_reexecution() { return (popframe_condition() & popframe_force_deopt_reexecution_bit) != 0; } |
| void clear_popframe_forcing_deopt_reexecution() { _popframe_condition &= ~popframe_force_deopt_reexecution_bit; } |
| |
| bool pop_frame_in_process(void) { return ((_popframe_condition & popframe_processing_bit) != 0); } |
| void set_pop_frame_in_process(void) { _popframe_condition |= popframe_processing_bit; } |
| void clr_pop_frame_in_process(void) { _popframe_condition &= ~popframe_processing_bit; } |
| |
| int frames_to_pop_failed_realloc() const { return _frames_to_pop_failed_realloc; } |
| void set_frames_to_pop_failed_realloc(int nb) { _frames_to_pop_failed_realloc = nb; } |
| void dec_frames_to_pop_failed_realloc() { _frames_to_pop_failed_realloc--; } |
| |
| private: |
| // Saved incoming arguments to popped frame. |
| // Used only when popped interpreted frame returns to deoptimized frame. |
| void* _popframe_preserved_args; |
| int _popframe_preserved_args_size; |
| |
| public: |
| void popframe_preserve_args(ByteSize size_in_bytes, void* start); |
| void* popframe_preserved_args(); |
| ByteSize popframe_preserved_args_size(); |
| WordSize popframe_preserved_args_size_in_words(); |
| void popframe_free_preserved_args(); |
| |
| |
| private: |
| JvmtiThreadState *_jvmti_thread_state; |
| |
| // Used by the interpreter in fullspeed mode for frame pop, method |
| // entry, method exit and single stepping support. This field is |
| // only set to non-zero at a safepoint or using a direct handshake |
| // (see EnterInterpOnlyModeClosure). |
| // It can be set to zero asynchronously to this threads execution (i.e., without |
| // safepoint/handshake or a lock) so we have to be very careful. |
| // Accesses by other threads are synchronized using JvmtiThreadState_lock though. |
| int _interp_only_mode; |
| |
| public: |
| // used by the interpreter for fullspeed debugging support (see above) |
| static ByteSize interp_only_mode_offset() { return byte_offset_of(JavaThread, _interp_only_mode); } |
| bool is_interp_only_mode() { return (_interp_only_mode != 0); } |
| int get_interp_only_mode() { return _interp_only_mode; } |
| void increment_interp_only_mode() { ++_interp_only_mode; } |
| void decrement_interp_only_mode() { --_interp_only_mode; } |
| |
| // support for cached flag that indicates whether exceptions need to be posted for this thread |
| // if this is false, we can avoid deoptimizing when events are thrown |
| // this gets set to reflect whether jvmtiExport::post_exception_throw would actually do anything |
| private: |
| int _should_post_on_exceptions_flag; |
| |
| public: |
| int should_post_on_exceptions_flag() { return _should_post_on_exceptions_flag; } |
| void set_should_post_on_exceptions_flag(int val) { _should_post_on_exceptions_flag = val; } |
| |
| private: |
| ThreadStatistics *_thread_stat; |
| |
| public: |
| ThreadStatistics* get_thread_stat() const { return _thread_stat; } |
| |
| // Return a blocker object for which this thread is blocked parking. |
| oop current_park_blocker(); |
| |
| private: |
| static size_t _stack_size_at_create; |
| |
| public: |
| static inline size_t stack_size_at_create(void) { |
| return _stack_size_at_create; |
| } |
| static inline void set_stack_size_at_create(size_t value) { |
| _stack_size_at_create = value; |
| } |
| |
| // Machine dependent stuff |
| #include OS_CPU_HEADER(thread) |
| |
| // JSR166 per-thread parker |
| private: |
| Parker _parker; |
| public: |
| Parker* parker() { return &_parker; } |
| |
| // Biased locking support |
| private: |
| GrowableArray<MonitorInfo*>* _cached_monitor_info; |
| public: |
| GrowableArray<MonitorInfo*>* cached_monitor_info() { return _cached_monitor_info; } |
| void set_cached_monitor_info(GrowableArray<MonitorInfo*>* info) { _cached_monitor_info = info; } |
| |
| // clearing/querying jni attach status |
| bool is_attaching_via_jni() const { return _jni_attach_state == _attaching_via_jni; } |
| bool has_attached_via_jni() const { return is_attaching_via_jni() || _jni_attach_state == _attached_via_jni; } |
| inline void set_done_attaching_via_jni(); |
| |
| // Stack dump assistance: |
| // Track the class we want to initialize but for which we have to wait |
| // on its init_lock() because it is already being initialized. |
| void set_class_to_be_initialized(InstanceKlass* k); |
| InstanceKlass* class_to_be_initialized() const; |
| |
| private: |
| InstanceKlass* _class_to_be_initialized; |
| |
| // java.lang.Thread.sleep support |
| ParkEvent * _SleepEvent; |
| public: |
| bool sleep(jlong millis); |
| |
| // java.lang.Thread interruption support |
| void interrupt(); |
| bool is_interrupted(bool clear_interrupted); |
| |
| static OopStorage* thread_oop_storage(); |
| |
| static void verify_cross_modify_fence_failure(JavaThread *thread) PRODUCT_RETURN; |
| }; |
| |
| // Inline implementation of JavaThread::current |
| inline JavaThread* JavaThread::current() { |
| return Thread::current()->as_Java_thread(); |
| } |
| |
| inline JavaThread* JavaThread::current_or_null() { |
| Thread* current = Thread::current_or_null(); |
| return current != nullptr ? current->as_Java_thread() : nullptr; |
| } |
| |
| inline JavaThread* Thread::as_Java_thread() { |
| assert(is_Java_thread(), "incorrect cast to JavaThread"); |
| return static_cast<JavaThread*>(this); |
| } |
| |
| inline const JavaThread* Thread::as_Java_thread() const { |
| assert(is_Java_thread(), "incorrect cast to const JavaThread"); |
| return static_cast<const JavaThread*>(this); |
| } |
| |
| // The active thread queue. It also keeps track of the current used |
| // thread priorities. |
| class Threads: AllStatic { |
| friend class VMStructs; |
| private: |
| static int _number_of_threads; |
| static int _number_of_non_daemon_threads; |
| static int _return_code; |
| static uintx _thread_claim_token; |
| #ifdef ASSERT |
| static bool _vm_complete; |
| #endif |
| |
| static void initialize_java_lang_classes(JavaThread* main_thread, TRAPS); |
| static void initialize_jsr292_core_classes(TRAPS); |
| |
| public: |
| // Thread management |
| // force_daemon is a concession to JNI, where we may need to add a |
| // thread to the thread list before allocating its thread object |
| static void add(JavaThread* p, bool force_daemon = false); |
| static void remove(JavaThread* p, bool is_daemon); |
| static void non_java_threads_do(ThreadClosure* tc); |
| static void java_threads_do(ThreadClosure* tc); |
| static void java_threads_and_vm_thread_do(ThreadClosure* tc); |
| static void threads_do(ThreadClosure* tc); |
| static void possibly_parallel_threads_do(bool is_par, ThreadClosure* tc); |
| |
| // Initializes the vm and creates the vm thread |
| static jint create_vm(JavaVMInitArgs* args, bool* canTryAgain); |
| static void convert_vm_init_libraries_to_agents(); |
| static void create_vm_init_libraries(); |
| static void create_vm_init_agents(); |
| static void shutdown_vm_agents(); |
| static void destroy_vm(); |
| // Supported VM versions via JNI |
| // Includes JNI_VERSION_1_1 |
| static jboolean is_supported_jni_version_including_1_1(jint version); |
| // Does not include JNI_VERSION_1_1 |
| static jboolean is_supported_jni_version(jint version); |
| |
| // The "thread claim token" provides a way for threads to be claimed |
| // by parallel worker tasks. |
| // |
| // Each thread contains a "token" field. A task will claim the |
| // thread only if its token is different from the global token, |
| // which is updated by calling change_thread_claim_token(). When |
| // a thread is claimed, it's token is set to the global token value |
| // so other threads in the same iteration pass won't claim it. |
| // |
| // For this to work change_thread_claim_token() needs to be called |
| // exactly once in sequential code before starting parallel tasks |
| // that should claim threads. |
| // |
| // New threads get their token set to 0 and change_thread_claim_token() |
| // never sets the global token to 0. |
| static uintx thread_claim_token() { return _thread_claim_token; } |
| static void change_thread_claim_token(); |
| static void assert_all_threads_claimed() NOT_DEBUG_RETURN; |
| |
| // Apply "f->do_oop" to all root oops in all threads. |
| // This version may only be called by sequential code. |
| static void oops_do(OopClosure* f, CodeBlobClosure* cf); |
| // This version may be called by sequential or parallel code. |
| static void possibly_parallel_oops_do(bool is_par, OopClosure* f, CodeBlobClosure* cf); |
| |
| // RedefineClasses support |
| static void metadata_do(MetadataClosure* f); |
| static void metadata_handles_do(void f(Metadata*)); |
| |
| #ifdef ASSERT |
| static bool is_vm_complete() { return _vm_complete; } |
| #endif // ASSERT |
| |
| // Verification |
| static void verify(); |
| static void print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks, bool print_extended_info); |
| static void print(bool print_stacks, bool internal_format) { |
| // this function is only used by debug.cpp |
| print_on(tty, print_stacks, internal_format, false /* no concurrent lock printed */, false /* simple format */); |
| } |
| static void print_on_error(outputStream* st, Thread* current, char* buf, int buflen); |
| static void print_on_error(Thread* this_thread, outputStream* st, Thread* current, char* buf, |
| int buflen, bool* found_current); |
| static void print_threads_compiling(outputStream* st, char* buf, int buflen, bool short_form = false); |
| |
| // Get Java threads that are waiting to enter a monitor. |
| static GrowableArray<JavaThread*>* get_pending_threads(ThreadsList * t_list, |
| int count, address monitor); |
| |
| // Get owning Java thread from the monitor's owner field. |
| static JavaThread *owning_thread_from_monitor_owner(ThreadsList * t_list, |
| address owner); |
| |
| // Number of threads on the active threads list |
| static int number_of_threads() { return _number_of_threads; } |
| // Number of non-daemon threads on the active threads list |
| static int number_of_non_daemon_threads() { return _number_of_non_daemon_threads; } |
| |
| // Deoptimizes all frames tied to marked nmethods |
| static void deoptimized_wrt_marked_nmethods(); |
| |
| struct Test; // For private gtest access. |
| }; |
| |
| class UnlockFlagSaver { |
| private: |
| JavaThread* _thread; |
| bool _do_not_unlock; |
| public: |
| UnlockFlagSaver(JavaThread* t) { |
| _thread = t; |
| _do_not_unlock = t->do_not_unlock_if_synchronized(); |
| t->set_do_not_unlock_if_synchronized(false); |
| } |
| ~UnlockFlagSaver() { |
| _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); |
| } |
| }; |
| |
| #endif // SHARE_RUNTIME_THREAD_HPP |