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 classes_array);
49 bool check_magic(objArrayHandle classes_array);
50 bool cleanup_magic_on_exit(objArrayHandle classes_array);
51
52 bool is_valid_in(Thread* thread, objArrayHandle classes_array) {
53 return (_thread == thread && check_magic(classes_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 classes_array,
68 objArrayHandle frames_array,
69 int& end_index, TRAPS);
70
71 static void fill_stackframe(Handle stackFrame, const methodHandle& method, int bci);
72
73 static void fill_live_stackframe(Handle stackFrame, const methodHandle& method, int bci,
74 javaVFrame* jvf, TRAPS);
75
76 static inline bool skip_hidden_frames(int mode) {
77 return (mode & JVM_STACKWALK_SHOW_HIDDEN_FRAMES) == 0;
78 }
79 static inline bool need_method_info(int mode) {
80 return (mode & JVM_STACKWALK_FILL_CLASS_REFS_ONLY) == 0;
81 }
82 static inline bool live_frame_info(int mode) {
83 return (mode & JVM_STACKWALK_FILL_LIVE_STACK_FRAMES) != 0;
84 }
85 static inline bool fill_in_stacktrace(int mode) {
86 return (mode & JVM_STACKWALK_FILTER_FILL_IN_STACK_TRACE) != 0;
87 }
88
89 public:
90 static oop walk(Handle stackStream, jlong mode,
91 int skip_frames, int frame_count, int start_index,
92 objArrayHandle classes_array,
93 objArrayHandle frames_array,
94 TRAPS);
95
96 static jint moreFrames(Handle stackStream, jlong mode, jlong magic,
97 int frame_count, int start_index,
98 objArrayHandle classes_array,
99 objArrayHandle frames_array,
100 TRAPS);
101 };
102 #endif // SHARE_VM_PRIMS_STACKWALK_HPP