Mercurial > hg > graal-compiler
annotate src/share/vm/c1/c1_ValueStack.cpp @ 1751:2528b5bd749c
6980262: Memory leak when exception is thrown in static initializer
Summary: Use resource memory instead of c-heap for the exception message
Reviewed-by: phh, jmasa
author | kamg |
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date | Fri, 27 Aug 2010 15:05:28 -0400 |
parents | b812ff5abc73 |
children | f02a8bbe6ed4 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2006, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_c1_ValueStack.cpp.incl" | |
27 | |
28 | |
29 // Implementation of ValueStack | |
30 | |
31 ValueStack::ValueStack(IRScope* scope, int locals_size, int max_stack_size) | |
32 : _scope(scope) | |
33 , _locals(locals_size, NULL) | |
34 , _stack(max_stack_size) | |
35 , _lock_stack(false) | |
36 , _locks(1) | |
37 { | |
38 assert(scope != NULL, "scope must exist"); | |
39 } | |
40 | |
41 ValueStack* ValueStack::copy() { | |
42 ValueStack* s = new ValueStack(scope(), locals_size(), max_stack_size()); | |
43 s->_stack.appendAll(&_stack); | |
44 s->_locks.appendAll(&_locks); | |
45 s->replace_locals(this); | |
46 return s; | |
47 } | |
48 | |
49 | |
50 ValueStack* ValueStack::copy_locks() { | |
51 int sz = scope()->lock_stack_size(); | |
52 if (stack_size() == 0) { | |
53 sz = 0; | |
54 } | |
55 ValueStack* s = new ValueStack(scope(), locals_size(), sz); | |
56 s->_lock_stack = true; | |
57 s->_locks.appendAll(&_locks); | |
58 s->replace_locals(this); | |
59 if (sz > 0) { | |
60 assert(sz <= stack_size(), "lock stack underflow"); | |
61 for (int i = 0; i < sz; i++) { | |
62 s->_stack.append(_stack[i]); | |
63 } | |
64 } | |
65 return s; | |
66 } | |
67 | |
68 bool ValueStack::is_same(ValueStack* s) { | |
69 assert(s != NULL, "state must exist"); | |
70 assert(scope () == s->scope (), "scopes must correspond"); | |
71 assert(locals_size() == s->locals_size(), "locals sizes must correspond"); | |
72 return is_same_across_scopes(s); | |
73 } | |
74 | |
75 | |
76 bool ValueStack::is_same_across_scopes(ValueStack* s) { | |
77 assert(s != NULL, "state must exist"); | |
78 assert(stack_size () == s->stack_size (), "stack sizes must correspond"); | |
79 assert(locks_size () == s->locks_size (), "locks sizes must correspond"); | |
80 // compare each stack element with the corresponding stack element of s | |
81 int index; | |
82 Value value; | |
83 for_each_stack_value(this, index, value) { | |
84 if (value->type()->tag() != s->stack_at(index)->type()->tag()) return false; | |
85 } | |
86 for_each_lock_value(this, index, value) { | |
87 if (value != s->lock_at(index)) return false; | |
88 } | |
89 return true; | |
90 } | |
91 | |
92 | |
93 ValueStack* ValueStack::caller_state() const { | |
94 return scope()->caller_state(); | |
95 } | |
96 | |
97 | |
98 void ValueStack::clear_locals() { | |
99 for (int i = _locals.length() - 1; i >= 0; i--) { | |
100 _locals.at_put(i, NULL); | |
101 } | |
102 } | |
103 | |
104 | |
105 void ValueStack::replace_locals(ValueStack* with) { | |
106 assert(locals_size() == with->locals_size(), "number of locals must match"); | |
107 for (int i = locals_size() - 1; i >= 0; i--) { | |
108 _locals.at_put(i, with->_locals.at(i)); | |
109 } | |
110 } | |
111 | |
112 void ValueStack::pin_stack_for_linear_scan() { | |
113 for_each_state_value(this, v, | |
114 if (v->as_Constant() == NULL && v->as_Local() == NULL) { | |
115 v->pin(Instruction::PinStackForStateSplit); | |
116 } | |
117 ); | |
118 } | |
119 | |
120 | |
121 // apply function to all values of a list; factored out from values_do(f) | |
1584 | 122 void ValueStack::apply(Values list, ValueVisitor* f) { |
0 | 123 for (int i = 0; i < list.length(); i++) { |
124 Value* va = list.adr_at(i); | |
125 Value v0 = *va; | |
126 if (v0 != NULL) { | |
127 if (!v0->type()->is_illegal()) { | |
128 assert(v0->as_HiWord() == NULL, "should never see HiWord during traversal"); | |
1584 | 129 f->visit(va); |
0 | 130 #ifdef ASSERT |
131 Value v1 = *va; | |
132 if (v0 != v1) { | |
133 assert(v1->type()->is_illegal() || v0->type()->tag() == v1->type()->tag(), "types must match"); | |
134 if (v0->type()->is_double_word()) { | |
135 list.at_put(i + 1, v0->hi_word()); | |
136 } | |
137 } | |
138 #endif | |
139 if (v0->type()->is_double_word()) i++; | |
140 } | |
141 } | |
142 } | |
143 } | |
144 | |
145 | |
1584 | 146 void ValueStack::values_do(ValueVisitor* f) { |
0 | 147 apply(_stack, f); |
148 apply(_locks, f); | |
149 | |
150 ValueStack* state = this; | |
151 for_each_state(state) { | |
152 apply(state->_locals, f); | |
153 } | |
154 } | |
155 | |
156 | |
157 Values* ValueStack::pop_arguments(int argument_size) { | |
158 assert(stack_size() >= argument_size, "stack too small or too many arguments"); | |
159 int base = stack_size() - argument_size; | |
160 Values* args = new Values(argument_size); | |
161 for (int i = base; i < stack_size();) args->push(stack_at_inc(i)); | |
162 truncate_stack(base); | |
163 return args; | |
164 } | |
165 | |
166 | |
167 int ValueStack::lock(IRScope* scope, Value obj) { | |
168 _locks.push(obj); | |
169 scope->set_min_number_of_locks(locks_size()); | |
170 return locks_size() - 1; | |
171 } | |
172 | |
173 | |
174 int ValueStack::unlock() { | |
175 _locks.pop(); | |
176 return locks_size(); | |
177 } | |
178 | |
179 | |
180 ValueStack* ValueStack::push_scope(IRScope* scope) { | |
181 assert(scope->caller() == _scope, "scopes must have caller/callee relationship"); | |
182 ValueStack* res = new ValueStack(scope, | |
183 scope->method()->max_locals(), | |
184 max_stack_size() + scope->method()->max_stack()); | |
185 // Preserves stack and monitors. | |
186 res->_stack.appendAll(&_stack); | |
187 res->_locks.appendAll(&_locks); | |
188 assert(res->_stack.size() <= res->max_stack_size(), "stack overflow"); | |
189 return res; | |
190 } | |
191 | |
192 | |
193 ValueStack* ValueStack::pop_scope() { | |
194 assert(_scope->caller() != NULL, "scope must have caller"); | |
195 IRScope* scope = _scope->caller(); | |
196 int max_stack = max_stack_size() - _scope->method()->max_stack(); | |
197 assert(max_stack >= 0, "stack underflow"); | |
198 ValueStack* res = new ValueStack(scope, | |
199 scope->method()->max_locals(), | |
200 max_stack); | |
201 // Preserves stack and monitors. Restores local and store state from caller scope. | |
202 res->_stack.appendAll(&_stack); | |
203 res->_locks.appendAll(&_locks); | |
204 ValueStack* caller = caller_state(); | |
205 if (caller != NULL) { | |
206 for (int i = 0; i < caller->_locals.length(); i++) { | |
207 res->_locals.at_put(i, caller->_locals.at(i)); | |
208 } | |
209 assert(res->_locals.length() == res->scope()->method()->max_locals(), "just checking"); | |
210 } | |
211 assert(res->_stack.size() <= res->max_stack_size(), "stack overflow"); | |
212 return res; | |
213 } | |
214 | |
215 | |
216 void ValueStack::setup_phi_for_stack(BlockBegin* b, int index) { | |
217 assert(stack_at(index)->as_Phi() == NULL || stack_at(index)->as_Phi()->block() != b, "phi function already created"); | |
218 | |
219 ValueType* t = stack_at(index)->type(); | |
220 Value phi = new Phi(t, b, -index - 1); | |
221 _stack[index] = phi; | |
222 | |
223 #ifdef ASSERT | |
224 if (t->is_double_word()) { | |
225 _stack[index + 1] = phi->hi_word(); | |
226 } | |
227 #endif | |
228 } | |
229 | |
230 void ValueStack::setup_phi_for_local(BlockBegin* b, int index) { | |
231 assert(local_at(index)->as_Phi() == NULL || local_at(index)->as_Phi()->block() != b, "phi function already created"); | |
232 | |
233 ValueType* t = local_at(index)->type(); | |
234 Value phi = new Phi(t, b, index); | |
235 store_local(index, phi); | |
236 } | |
237 | |
238 #ifndef PRODUCT | |
239 void ValueStack::print() { | |
240 if (stack_is_empty()) { | |
241 tty->print_cr("empty stack"); | |
242 } else { | |
243 InstructionPrinter ip; | |
244 for (int i = 0; i < stack_size();) { | |
245 Value t = stack_at_inc(i); | |
246 tty->print("%2d ", i); | |
247 ip.print_instr(t); | |
248 tty->cr(); | |
249 } | |
250 } | |
251 if (!no_active_locks()) { | |
252 InstructionPrinter ip; | |
253 for (int i = 0; i < locks_size(); i--) { | |
254 Value t = lock_at(i); | |
255 tty->print("lock %2d ", i); | |
256 if (t == NULL) { | |
257 tty->print("this"); | |
258 } else { | |
259 ip.print_instr(t); | |
260 } | |
261 tty->cr(); | |
262 } | |
263 } | |
264 if (locals_size() > 0) { | |
265 InstructionPrinter ip; | |
266 for (int i = 0; i < locals_size();) { | |
267 Value l = _locals[i]; | |
268 tty->print("local %d ", i); | |
269 if (l == NULL) { | |
270 tty->print("null"); | |
271 i ++; | |
272 } else { | |
273 ip.print_instr(l); | |
274 if (l->type()->is_illegal() || l->type()->is_single_word()) i ++; else i += 2; | |
275 } | |
276 tty->cr(); | |
277 } | |
278 } | |
279 } | |
280 | |
281 | |
282 void ValueStack::verify() { | |
283 Unimplemented(); | |
284 } | |
285 #endif // PRODUCT |