Mercurial > hg > truffle
annotate src/share/vm/classfile/stackMapFrame.hpp @ 21936:49dad3e40b57
Convert addresses in ArrayCopyCallNode to word size
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Fri, 12 Jun 2015 14:52:08 +0200 |
parents | 8cb56c8cb30d |
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rev | line source |
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0 | 1 /* |
18052 | 2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_CLASSFILE_STACKMAPFRAME_HPP |
26 #define SHARE_VM_CLASSFILE_STACKMAPFRAME_HPP | |
27 | |
28 #include "classfile/verificationType.hpp" | |
29 #include "classfile/verifier.hpp" | |
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30 #include "oops/method.hpp" |
1972 | 31 #include "runtime/handles.hpp" |
32 #include "runtime/signature.hpp" | |
33 #include "utilities/exceptions.hpp" | |
34 | |
0 | 35 // A StackMapFrame represents one frame in the stack map attribute. |
36 | |
6605 | 37 class TypeContext; |
38 | |
0 | 39 enum { |
40 FLAG_THIS_UNINIT = 0x01 | |
41 }; | |
42 | |
43 class StackMapFrame : public ResourceObj { | |
44 private: | |
45 int32_t _offset; | |
46 | |
47 // See comment in StackMapTable about _frame_count about why these | |
48 // fields are int32_t instead of u2. | |
49 int32_t _locals_size; // number of valid type elements in _locals | |
50 int32_t _stack_size; // number of valid type elements in _stack | |
51 | |
6605 | 52 int32_t _stack_mark; // Records the size of the stack prior to an |
53 // instruction modification, to allow rewinding | |
54 // when/if an error occurs. | |
55 | |
0 | 56 int32_t _max_locals; |
57 int32_t _max_stack; | |
58 | |
59 u1 _flags; | |
60 VerificationType* _locals; // local variable type array | |
61 VerificationType* _stack; // operand stack type array | |
62 | |
63 ClassVerifier* _verifier; // the verifier verifying this method | |
64 | |
6605 | 65 StackMapFrame(const StackMapFrame& cp) : |
66 _offset(cp._offset), _locals_size(cp._locals_size), | |
67 _stack_size(cp._stack_size), _stack_mark(cp._stack_mark), | |
68 _max_locals(cp._max_locals), _max_stack(cp._max_stack), | |
69 _flags(cp._flags) { | |
70 _locals = NEW_RESOURCE_ARRAY(VerificationType, _max_locals); | |
71 for (int i = 0; i < _max_locals; ++i) { | |
72 if (i < _locals_size) { | |
73 _locals[i] = cp._locals[i]; | |
74 } else { | |
75 _locals[i] = VerificationType::bogus_type(); | |
76 } | |
77 } | |
78 int ss = MAX2(_stack_size, _stack_mark); | |
79 _stack = NEW_RESOURCE_ARRAY(VerificationType, _max_stack); | |
80 for (int i = 0; i < _max_stack; ++i) { | |
81 if (i < ss) { | |
82 _stack[i] = cp._stack[i]; | |
83 } else { | |
84 _stack[i] = VerificationType::bogus_type(); | |
85 } | |
86 } | |
87 _verifier = NULL; | |
88 } | |
89 | |
0 | 90 public: |
91 // constructors | |
92 | |
93 // This constructor is used by the type checker to allocate frames | |
94 // in type state, which have _max_locals and _max_stack array elements | |
95 // in _locals and _stack. | |
96 StackMapFrame(u2 max_locals, u2 max_stack, ClassVerifier* verifier); | |
97 | |
98 // This constructor is used to initialize stackmap frames in stackmap table, | |
99 // which have _locals_size and _stack_size array elements in _locals and _stack. | |
100 StackMapFrame(int32_t offset, | |
101 u1 flags, | |
102 u2 locals_size, | |
103 u2 stack_size, | |
104 u2 max_locals, | |
105 u2 max_stack, | |
106 VerificationType* locals, | |
107 VerificationType* stack, | |
108 ClassVerifier* v) : _offset(offset), _flags(flags), | |
109 _locals_size(locals_size), | |
110 _stack_size(stack_size), | |
6605 | 111 _stack_mark(-1), |
0 | 112 _max_locals(max_locals), |
113 _max_stack(max_stack), | |
114 _locals(locals), _stack(stack), | |
115 _verifier(v) { } | |
116 | |
6605 | 117 static StackMapFrame* copy(StackMapFrame* smf) { |
118 return new StackMapFrame(*smf); | |
119 } | |
120 | |
0 | 121 inline void set_offset(int32_t offset) { _offset = offset; } |
122 inline void set_verifier(ClassVerifier* v) { _verifier = v; } | |
123 inline void set_flags(u1 flags) { _flags = flags; } | |
124 inline void set_locals_size(u2 locals_size) { _locals_size = locals_size; } | |
6605 | 125 inline void set_stack_size(u2 stack_size) { _stack_size = _stack_mark = stack_size; } |
0 | 126 inline void clear_stack() { _stack_size = 0; } |
127 inline int32_t offset() const { return _offset; } | |
128 inline ClassVerifier* verifier() const { return _verifier; } | |
129 inline u1 flags() const { return _flags; } | |
130 inline int32_t locals_size() const { return _locals_size; } | |
131 inline VerificationType* locals() const { return _locals; } | |
132 inline int32_t stack_size() const { return _stack_size; } | |
133 inline VerificationType* stack() const { return _stack; } | |
134 inline int32_t max_locals() const { return _max_locals; } | |
135 inline int32_t max_stack() const { return _max_stack; } | |
136 inline bool flag_this_uninit() const { return _flags & FLAG_THIS_UNINIT; } | |
137 | |
138 // Set locals and stack types to bogus | |
139 inline void reset() { | |
140 int32_t i; | |
141 for (i = 0; i < _max_locals; i++) { | |
142 _locals[i] = VerificationType::bogus_type(); | |
143 } | |
144 for (i = 0; i < _max_stack; i++) { | |
145 _stack[i] = VerificationType::bogus_type(); | |
146 } | |
147 } | |
148 | |
149 // Return a StackMapFrame with the same local variable array and empty stack. | |
150 // Stack array is allocate with unused one element. | |
151 StackMapFrame* frame_in_exception_handler(u1 flags); | |
152 | |
153 // Set local variable type array based on m's signature. | |
154 VerificationType set_locals_from_arg( | |
155 const methodHandle m, VerificationType thisKlass, TRAPS); | |
156 | |
157 // Search local variable type array and stack type array. | |
158 // Set every element with type of old_object to new_object. | |
159 void initialize_object( | |
160 VerificationType old_object, VerificationType new_object); | |
161 | |
162 // Copy local variable type array in src into this local variable type array. | |
163 void copy_locals(const StackMapFrame* src); | |
164 | |
165 // Copy stack type array in src into this stack type array. | |
166 void copy_stack(const StackMapFrame* src); | |
167 | |
168 // Return true if this stack map frame is assignable to target. | |
6605 | 169 bool is_assignable_to( |
170 const StackMapFrame* target, bool is_exception_handler, | |
171 ErrorContext* ctx, TRAPS) const; | |
172 | |
173 inline void set_mark() { | |
9152 | 174 #ifdef ASSERT |
6605 | 175 // Put bogus type to indicate it's no longer valid. |
176 if (_stack_mark != -1) { | |
7985 | 177 for (int i = _stack_mark - 1; i >= _stack_size; --i) { |
6605 | 178 _stack[i] = VerificationType::bogus_type(); |
179 } | |
180 } | |
9152 | 181 #endif // def ASSERT |
6605 | 182 _stack_mark = _stack_size; |
183 } | |
184 | |
185 // Used when an error occurs and we want to reset the stack to the state | |
186 // it was before operands were popped off. | |
187 void restore() { | |
188 if (_stack_mark != -1) { | |
189 _stack_size = _stack_mark; | |
190 } | |
191 } | |
0 | 192 |
193 // Push type into stack type array. | |
194 inline void push_stack(VerificationType type, TRAPS) { | |
195 assert(!type.is_check(), "Must be a real type"); | |
196 if (_stack_size >= _max_stack) { | |
6605 | 197 verifier()->verify_error( |
198 ErrorContext::stack_overflow(_offset, this), | |
199 "Operand stack overflow"); | |
0 | 200 return; |
201 } | |
202 _stack[_stack_size++] = type; | |
203 } | |
204 | |
205 inline void push_stack_2( | |
206 VerificationType type1, VerificationType type2, TRAPS) { | |
207 assert(type1.is_long() || type1.is_double(), "must be long/double"); | |
208 assert(type2.is_long2() || type2.is_double2(), "must be long/double_2"); | |
209 if (_stack_size >= _max_stack - 1) { | |
6605 | 210 verifier()->verify_error( |
211 ErrorContext::stack_overflow(_offset, this), | |
212 "Operand stack overflow"); | |
0 | 213 return; |
214 } | |
215 _stack[_stack_size++] = type1; | |
216 _stack[_stack_size++] = type2; | |
217 } | |
218 | |
219 // Pop and return the top type on stack without verifying. | |
220 inline VerificationType pop_stack(TRAPS) { | |
221 if (_stack_size <= 0) { | |
6605 | 222 verifier()->verify_error( |
223 ErrorContext::stack_underflow(_offset, this), | |
224 "Operand stack underflow"); | |
0 | 225 return VerificationType::bogus_type(); |
226 } | |
227 VerificationType top = _stack[--_stack_size]; | |
228 return top; | |
229 } | |
230 | |
231 // Pop and return the top type on stack type array after verifying it | |
232 // is assignable to type. | |
233 inline VerificationType pop_stack(VerificationType type, TRAPS) { | |
234 if (_stack_size != 0) { | |
235 VerificationType top = _stack[_stack_size - 1]; | |
236 bool subtype = type.is_assignable_from( | |
18052 | 237 top, verifier(), false, CHECK_(VerificationType::bogus_type())); |
0 | 238 if (subtype) { |
6605 | 239 --_stack_size; |
0 | 240 return top; |
241 } | |
242 } | |
243 return pop_stack_ex(type, THREAD); | |
244 } | |
245 | |
246 inline void pop_stack_2( | |
247 VerificationType type1, VerificationType type2, TRAPS) { | |
248 assert(type1.is_long2() || type1.is_double2(), "must be long/double"); | |
249 assert(type2.is_long() || type2.is_double(), "must be long/double_2"); | |
250 if (_stack_size >= 2) { | |
251 VerificationType top1 = _stack[_stack_size - 1]; | |
18052 | 252 bool subtype1 = type1.is_assignable_from(top1, verifier(), false, CHECK); |
0 | 253 VerificationType top2 = _stack[_stack_size - 2]; |
18052 | 254 bool subtype2 = type2.is_assignable_from(top2, verifier(), false, CHECK); |
0 | 255 if (subtype1 && subtype2) { |
256 _stack_size -= 2; | |
257 return; | |
258 } | |
259 } | |
260 pop_stack_ex(type1, THREAD); | |
261 pop_stack_ex(type2, THREAD); | |
262 } | |
263 | |
6605 | 264 VerificationType local_at(int index) { |
265 return _locals[index]; | |
266 } | |
267 | |
268 VerificationType stack_at(int index) { | |
269 return _stack[index]; | |
270 } | |
271 | |
0 | 272 // Uncommon case that throws exceptions. |
273 VerificationType pop_stack_ex(VerificationType type, TRAPS); | |
274 | |
275 // Return the type at index in local variable array after verifying | |
276 // it is assignable to type. | |
277 VerificationType get_local(int32_t index, VerificationType type, TRAPS); | |
278 // For long/double. | |
279 void get_local_2( | |
280 int32_t index, VerificationType type1, VerificationType type2, TRAPS); | |
281 | |
282 // Set element at index in local variable array to type. | |
283 void set_local(int32_t index, VerificationType type, TRAPS); | |
284 // For long/double. | |
285 void set_local_2( | |
286 int32_t index, VerificationType type1, VerificationType type2, TRAPS); | |
287 | |
288 // Private auxiliary method used only in is_assignable_to(StackMapFrame). | |
289 // Returns true if src is assignable to target. | |
6605 | 290 int is_assignable_to( |
0 | 291 VerificationType* src, VerificationType* target, int32_t len, TRAPS) const; |
292 | |
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293 bool has_flag_match_exception(const StackMapFrame* target) const; |
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294 |
6605 | 295 TypeOrigin stack_top_ctx(); |
296 | |
297 void print_on(outputStream* str) const; | |
0 | 298 }; |
1972 | 299 |
300 #endif // SHARE_VM_CLASSFILE_STACKMAPFRAME_HPP |