|
1010
|
1 /*
|
|
|
2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
|
|
1379
|
3 * Copyright 2008, 2009, 2010 Red Hat, Inc.
|
|
1010
|
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
|
5 *
|
|
|
6 * This code is free software; you can redistribute it and/or modify it
|
|
|
7 * under the terms of the GNU General Public License version 2 only, as
|
|
|
8 * published by the Free Software Foundation.
|
|
|
9 *
|
|
|
10 * This code is distributed in the hope that it will be useful, but WITHOUT
|
|
|
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
13 * version 2 for more details (a copy is included in the LICENSE file that
|
|
|
14 * accompanied this code).
|
|
|
15 *
|
|
|
16 * You should have received a copy of the GNU General Public License version
|
|
|
17 * 2 along with this work; if not, write to the Free Software Foundation,
|
|
|
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
19 *
|
|
|
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
|
21 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
|
22 * have any questions.
|
|
|
23 *
|
|
|
24 */
|
|
|
25
|
|
|
26 class ZeroStack {
|
|
|
27 private:
|
|
|
28 intptr_t *_base; // the last available word
|
|
|
29 intptr_t *_top; // the word past the end of the stack
|
|
|
30 intptr_t *_sp; // the top word on the stack
|
|
|
31
|
|
1379
|
32 private:
|
|
|
33 int _shadow_pages_size; // how much ABI stack must we keep free?
|
|
|
34
|
|
1010
|
35 public:
|
|
|
36 ZeroStack()
|
|
1379
|
37 : _base(NULL), _top(NULL), _sp(NULL) {
|
|
|
38 _shadow_pages_size = StackShadowPages * os::vm_page_size();
|
|
|
39 }
|
|
1010
|
40
|
|
|
41 bool needs_setup() const {
|
|
|
42 return _base == NULL;
|
|
|
43 }
|
|
|
44
|
|
|
45 void setup(void *mem, size_t size) {
|
|
|
46 assert(needs_setup(), "already set up");
|
|
|
47 assert(!(size & WordAlignmentMask), "unaligned");
|
|
|
48
|
|
|
49 _base = (intptr_t *) mem;
|
|
|
50 _top = _base + (size >> LogBytesPerWord);
|
|
|
51 _sp = _top;
|
|
|
52 }
|
|
|
53 void teardown() {
|
|
|
54 assert(!needs_setup(), "not set up");
|
|
|
55 assert(_sp == _top, "stuff on stack at teardown");
|
|
|
56
|
|
|
57 _base = NULL;
|
|
|
58 _top = NULL;
|
|
|
59 _sp = NULL;
|
|
|
60 }
|
|
|
61
|
|
|
62 intptr_t *sp() const {
|
|
|
63 return _sp;
|
|
|
64 }
|
|
|
65 void set_sp(intptr_t *new_sp) {
|
|
|
66 assert(_top >= new_sp && new_sp >= _base, "bad stack pointer");
|
|
|
67 _sp = new_sp;
|
|
|
68 }
|
|
|
69
|
|
|
70 int available_words() const {
|
|
|
71 return _sp - _base;
|
|
|
72 }
|
|
|
73
|
|
|
74 void push(intptr_t value) {
|
|
|
75 assert(_sp > _base, "stack overflow");
|
|
|
76 *(--_sp) = value;
|
|
|
77 }
|
|
|
78 intptr_t pop() {
|
|
|
79 assert(_sp < _top, "stack underflow");
|
|
|
80 return *(_sp++);
|
|
|
81 }
|
|
|
82
|
|
|
83 void *alloc(size_t size) {
|
|
|
84 int count = align_size_up(size, wordSize) >> LogBytesPerWord;
|
|
|
85 assert(count <= available_words(), "stack overflow");
|
|
|
86 return _sp -= count;
|
|
|
87 }
|
|
|
88
|
|
1379
|
89 int shadow_pages_size() const {
|
|
|
90 return _shadow_pages_size;
|
|
|
91 }
|
|
|
92
|
|
|
93 public:
|
|
|
94 void overflow_check(int required_words, TRAPS);
|
|
|
95 static void handle_overflow(TRAPS);
|
|
|
96
|
|
1010
|
97 public:
|
|
1505
|
98 void zap(int c) PRODUCT_RETURN;
|
|
|
99
|
|
|
100 public:
|
|
1010
|
101 static ByteSize base_offset() {
|
|
|
102 return byte_offset_of(ZeroStack, _base);
|
|
|
103 }
|
|
|
104 static ByteSize top_offset() {
|
|
|
105 return byte_offset_of(ZeroStack, _top);
|
|
|
106 }
|
|
|
107 static ByteSize sp_offset() {
|
|
|
108 return byte_offset_of(ZeroStack, _sp);
|
|
|
109 }
|
|
|
110 };
|
|
|
111
|
|
|
112
|
|
|
113 class EntryFrame;
|
|
|
114 class InterpreterFrame;
|
|
|
115 class SharkFrame;
|
|
|
116 class FakeStubFrame;
|
|
|
117
|
|
|
118 //
|
|
|
119 // | ... |
|
|
|
120 // +--------------------+ ------------------
|
|
|
121 // | ... | low addresses
|
|
|
122 // | frame_type |
|
|
|
123 // | next_frame | high addresses
|
|
|
124 // +--------------------+ ------------------
|
|
|
125 // | ... |
|
|
|
126
|
|
|
127 class ZeroFrame {
|
|
|
128 friend class frame;
|
|
|
129 friend class ZeroStackPrinter;
|
|
|
130
|
|
|
131 protected:
|
|
|
132 ZeroFrame() {
|
|
|
133 ShouldNotCallThis();
|
|
|
134 }
|
|
|
135
|
|
|
136 enum Layout {
|
|
|
137 next_frame_off,
|
|
|
138 frame_type_off,
|
|
|
139 jf_header_words
|
|
|
140 };
|
|
|
141
|
|
|
142 enum FrameType {
|
|
|
143 ENTRY_FRAME = 1,
|
|
|
144 INTERPRETER_FRAME,
|
|
|
145 SHARK_FRAME,
|
|
|
146 FAKE_STUB_FRAME
|
|
|
147 };
|
|
|
148
|
|
|
149 protected:
|
|
|
150 intptr_t *addr_of_word(int offset) const {
|
|
|
151 return (intptr_t *) this - offset;
|
|
|
152 }
|
|
|
153 intptr_t value_of_word(int offset) const {
|
|
|
154 return *addr_of_word(offset);
|
|
|
155 }
|
|
|
156
|
|
|
157 public:
|
|
|
158 ZeroFrame *next() const {
|
|
|
159 return (ZeroFrame *) value_of_word(next_frame_off);
|
|
|
160 }
|
|
|
161
|
|
|
162 protected:
|
|
|
163 FrameType type() const {
|
|
|
164 return (FrameType) value_of_word(frame_type_off);
|
|
|
165 }
|
|
|
166
|
|
|
167 public:
|
|
|
168 bool is_entry_frame() const {
|
|
|
169 return type() == ENTRY_FRAME;
|
|
|
170 }
|
|
|
171 bool is_interpreter_frame() const {
|
|
|
172 return type() == INTERPRETER_FRAME;
|
|
|
173 }
|
|
|
174 bool is_shark_frame() const {
|
|
|
175 return type() == SHARK_FRAME;
|
|
|
176 }
|
|
|
177 bool is_fake_stub_frame() const {
|
|
|
178 return type() == FAKE_STUB_FRAME;
|
|
|
179 }
|
|
|
180
|
|
|
181 public:
|
|
|
182 EntryFrame *as_entry_frame() const {
|
|
|
183 assert(is_entry_frame(), "should be");
|
|
|
184 return (EntryFrame *) this;
|
|
|
185 }
|
|
|
186 InterpreterFrame *as_interpreter_frame() const {
|
|
|
187 assert(is_interpreter_frame(), "should be");
|
|
|
188 return (InterpreterFrame *) this;
|
|
|
189 }
|
|
|
190 SharkFrame *as_shark_frame() const {
|
|
|
191 assert(is_shark_frame(), "should be");
|
|
|
192 return (SharkFrame *) this;
|
|
|
193 }
|
|
|
194 FakeStubFrame *as_fake_stub_frame() const {
|
|
|
195 assert(is_fake_stub_frame(), "should be");
|
|
|
196 return (FakeStubFrame *) this;
|
|
|
197 }
|
|
|
198
|
|
|
199 public:
|
|
|
200 void identify_word(int frame_index,
|
|
|
201 int offset,
|
|
|
202 char* fieldbuf,
|
|
|
203 char* valuebuf,
|
|
|
204 int buflen) const;
|
|
|
205
|
|
|
206 protected:
|
|
|
207 void identify_vp_word(int frame_index,
|
|
|
208 intptr_t* addr,
|
|
|
209 intptr_t* monitor_base,
|
|
|
210 intptr_t* stack_base,
|
|
|
211 char* fieldbuf,
|
|
|
212 int buflen) const;
|
|
|
213 };
|
