| /* |
| * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| |
| #ifndef SHARE_VM_PRIMS_STACKWALK_HPP |
| #define SHARE_VM_PRIMS_STACKWALK_HPP |
| |
| #include "oops/oop.hpp" |
| #include "runtime/vframe.hpp" |
| |
| // BaseFrameStream is an abstract base class for encapsulating the VM-side |
| // implementation of the StackWalker API. There are two concrete subclasses: |
| // - JavaFrameStream: |
| // -based on vframeStream; used in most instances |
| // - LiveFrameStream: |
| // -based on javaVFrame; used for retrieving locals/monitors/operands for |
| // LiveStackFrame |
| class BaseFrameStream : public StackObj { |
| private: |
| enum { |
| magic_pos = 0 |
| }; |
| |
| JavaThread* _thread; |
| jlong _anchor; |
| protected: |
| void fill_stackframe(Handle stackFrame, const methodHandle& method, TRAPS); |
| public: |
| BaseFrameStream(JavaThread* thread) : _thread(thread), _anchor(0L) {} |
| |
| virtual void next()=0; |
| virtual bool at_end()=0; |
| |
| virtual Method* method()=0; |
| virtual int bci()=0; |
| |
| virtual void fill_frame(int index, objArrayHandle frames_array, |
| const methodHandle& method, TRAPS)=0; |
| |
| void setup_magic_on_entry(objArrayHandle frames_array); |
| bool check_magic(objArrayHandle frames_array); |
| bool cleanup_magic_on_exit(objArrayHandle frames_array); |
| |
| bool is_valid_in(Thread* thread, objArrayHandle frames_array) { |
| return (_thread == thread && check_magic(frames_array)); |
| } |
| |
| jlong address_value() { |
| return (jlong) castable_address(this); |
| } |
| |
| static BaseFrameStream* from_current(JavaThread* thread, jlong magic, objArrayHandle frames_array); |
| }; |
| |
| class JavaFrameStream : public BaseFrameStream { |
| private: |
| vframeStream _vfst; |
| bool _need_method_info; |
| public: |
| JavaFrameStream(JavaThread* thread, int mode); |
| |
| void next() { _vfst.next();} |
| bool at_end() { return _vfst.at_end(); } |
| |
| Method* method() { return _vfst.method(); } |
| int bci() { return _vfst.bci(); } |
| |
| void fill_frame(int index, objArrayHandle frames_array, |
| const methodHandle& method, TRAPS); |
| }; |
| |
| class LiveFrameStream : public BaseFrameStream { |
| private: |
| enum { |
| MODE_INTERPRETED = 0x01, |
| MODE_COMPILED = 0x02 |
| }; |
| |
| javaVFrame* _jvf; |
| |
| void fill_live_stackframe(Handle stackFrame, const methodHandle& method, TRAPS); |
| static oop create_primitive_slot_instance(StackValueCollection* values, |
| int i, BasicType type, TRAPS); |
| static objArrayHandle monitors_to_object_array(GrowableArray<MonitorInfo*>* monitors, |
| TRAPS); |
| static objArrayHandle values_to_object_array(StackValueCollection* values, TRAPS); |
| public: |
| LiveFrameStream(JavaThread* thread, RegisterMap* rm) : BaseFrameStream(thread) { |
| _jvf = thread->last_java_vframe(rm); |
| } |
| |
| void next() { _jvf = _jvf->java_sender(); } |
| bool at_end() { return _jvf == NULL; } |
| |
| Method* method() { return _jvf->method(); } |
| int bci() { return _jvf->bci(); } |
| |
| void fill_frame(int index, objArrayHandle frames_array, |
| const methodHandle& method, TRAPS); |
| }; |
| |
| class StackWalk : public AllStatic { |
| private: |
| static int fill_in_frames(jlong mode, BaseFrameStream& stream, |
| int max_nframes, int start_index, |
| objArrayHandle frames_array, |
| int& end_index, TRAPS); |
| |
| static inline bool get_caller_class(int mode) { |
| return (mode & JVM_STACKWALK_GET_CALLER_CLASS) != 0; |
| } |
| static inline bool skip_hidden_frames(int mode) { |
| return (mode & JVM_STACKWALK_SHOW_HIDDEN_FRAMES) == 0; |
| } |
| static inline bool live_frame_info(int mode) { |
| return (mode & JVM_STACKWALK_FILL_LIVE_STACK_FRAMES) != 0; |
| } |
| |
| public: |
| static inline bool need_method_info(int mode) { |
| return (mode & JVM_STACKWALK_FILL_CLASS_REFS_ONLY) == 0; |
| } |
| static inline bool use_frames_array(int mode) { |
| return (mode & JVM_STACKWALK_FILL_CLASS_REFS_ONLY) == 0; |
| } |
| static oop walk(Handle stackStream, jlong mode, |
| int skip_frames, int frame_count, int start_index, |
| objArrayHandle frames_array, |
| TRAPS); |
| |
| static oop fetchFirstBatch(BaseFrameStream& stream, Handle stackStream, |
| jlong mode, int skip_frames, int frame_count, |
| int start_index, objArrayHandle frames_array, TRAPS); |
| |
| static jint fetchNextBatch(Handle stackStream, jlong mode, jlong magic, |
| int frame_count, int start_index, |
| objArrayHandle frames_array, TRAPS); |
| }; |
| #endif // SHARE_VM_PRIMS_STACKWALK_HPP |