1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 26 #ifndef SHARE_VM_PRIMS_STACKWALK_HPP 27 #define SHARE_VM_PRIMS_STACKWALK_HPP 28 29 #include "oops/oop.hpp" 30 #include "runtime/vframe.hpp" 31 32 class StackWalkAnchor : public StackObj { 33 private: 34 enum { 35 magic_pos = 0 36 }; 37 38 JavaThread* _thread; 39 vframeStream _vfst; 40 jlong _anchor; 41 public: 42 StackWalkAnchor(JavaThread* thread) 43 : _thread(thread), _vfst(thread), _anchor(0L) {} 44 45 vframeStream& vframe_stream() { return _vfst; } 46 JavaThread* thread() { return _thread; } 47 48 void setup_magic_on_entry(objArrayHandle frames_array); 49 bool check_magic(objArrayHandle frames_array); 50 bool cleanup_magic_on_exit(objArrayHandle frames_array); 51 52 bool is_valid_in(Thread* thread, objArrayHandle frames_array) { 53 return (_thread == thread && check_magic(frames_array)); 54 } 55 56 jlong address_value() { 57 return (jlong) castable_address(this); 58 } 59 60 static StackWalkAnchor* from_current(JavaThread* thread, jlong anchor, objArrayHandle frames_array); 61 }; 62 63 class StackWalk : public AllStatic { 64 private: 65 static int fill_in_frames(jlong mode, vframeStream& vfst, 66 int max_nframes, int start_index, 67 objArrayHandle frames_array, 68 int& end_index, TRAPS); 69 70 static void fill_stackframe(Handle stackFrame, const methodHandle& method, int bci); 71 72 static void fill_live_stackframe(Handle stackFrame, const methodHandle& method, int bci, 73 javaVFrame* jvf, TRAPS); 74 75 static inline bool skip_hidden_frames(int mode) { 76 return (mode & JVM_STACKWALK_SHOW_HIDDEN_FRAMES) == 0; 77 } 78 static inline bool need_method_info(int mode) { 79 return (mode & JVM_STACKWALK_FILL_CLASS_REFS_ONLY) == 0; 80 } 81 static inline bool live_frame_info(int mode) { 82 return (mode & JVM_STACKWALK_FILL_LIVE_STACK_FRAMES) != 0; 83 } 84 85 public: 86 static inline bool use_frames_array(int mode) { 87 return (mode & JVM_STACKWALK_FILL_CLASS_REFS_ONLY) == 0; 88 } 89 static oop walk(Handle stackStream, jlong mode, 90 int skip_frames, int frame_count, int start_index, 91 objArrayHandle frames_array, 92 TRAPS); 93 94 static jint moreFrames(Handle stackStream, jlong mode, jlong magic, 95 int frame_count, int start_index, 96 objArrayHandle frames_array, 97 TRAPS); 98 }; 99 #endif // SHARE_VM_PRIMS_STACKWALK_HPP