Mercurial > hg > truffle
annotate src/share/vm/classfile/stackMapFrame.cpp @ 18134:6a2f814224b1
hotspot/graal: simplify CTW logic. now, the following configurations are supported:
(1) CTW with Graal, graal compiled by itself with bootstrap (--vm graal -XX:+BootstrapGraal -XX:-TieredCompilation -XX:+CompileTheWorld)
(2) CTW with Graal, graal compiled by C1/itself aka. tiered with bootstrap (--vm graal -XX:+BootstrapGraal -XX:+TieredCompilation +XX:+CompileTheWorld)
(3) CTW with Graal, graal compiled by itself without bootstrap (--vm graal -XX:-BootstrapGraal -XX:-TieredCompilation -XX:+CompileTheWorld)
(4) CTW with Graal, graal compiled by C1/itself aka. tiered without bootstrap (--vm graal -XX:-BootstrapGraal -XX:+TieredCompilation -XX:+CompileTheWorld)
(5) CTW with Graal, graal compiled by C1/C2 aka. hosted (--vm server -XX:+CompileTheWorld)
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Tue, 21 Oct 2014 10:17:06 +0200 |
parents | c77d5db18942 |
children | 8cb56c8cb30d |
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 * | |
1552
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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 #include "precompiled.hpp" |
26 #include "classfile/stackMapFrame.hpp" | |
27 #include "classfile/verifier.hpp" | |
28 #include "memory/resourceArea.hpp" | |
29 #include "oops/oop.inline.hpp" | |
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30 #include "oops/symbol.hpp" |
1972 | 31 #include "runtime/handles.inline.hpp" |
32 #include "utilities/globalDefinitions.hpp" | |
0 | 33 |
34 StackMapFrame::StackMapFrame(u2 max_locals, u2 max_stack, ClassVerifier* v) : | |
6605 | 35 _offset(0), _locals_size(0), _stack_size(0), |
36 _stack_mark(0), _flags(0), _max_locals(max_locals), | |
37 _max_stack(max_stack), _verifier(v) { | |
0 | 38 Thread* thr = v->thread(); |
39 _locals = NEW_RESOURCE_ARRAY_IN_THREAD(thr, VerificationType, max_locals); | |
40 _stack = NEW_RESOURCE_ARRAY_IN_THREAD(thr, VerificationType, max_stack); | |
41 int32_t i; | |
42 for(i = 0; i < max_locals; i++) { | |
43 _locals[i] = VerificationType::bogus_type(); | |
44 } | |
45 for(i = 0; i < max_stack; i++) { | |
46 _stack[i] = VerificationType::bogus_type(); | |
47 } | |
48 } | |
49 | |
50 StackMapFrame* StackMapFrame::frame_in_exception_handler(u1 flags) { | |
51 Thread* thr = _verifier->thread(); | |
52 VerificationType* stack = NEW_RESOURCE_ARRAY_IN_THREAD(thr, VerificationType, 1); | |
53 StackMapFrame* frame = new StackMapFrame(_offset, flags, _locals_size, 0, _max_locals, _max_stack, _locals, stack, _verifier); | |
54 return frame; | |
55 } | |
56 | |
57 void StackMapFrame::initialize_object( | |
58 VerificationType old_object, VerificationType new_object) { | |
59 int32_t i; | |
60 for (i = 0; i < _max_locals; i++) { | |
61 if (_locals[i].equals(old_object)) { | |
62 _locals[i] = new_object; | |
63 } | |
64 } | |
65 for (i = 0; i < _stack_size; i++) { | |
66 if (_stack[i].equals(old_object)) { | |
67 _stack[i] = new_object; | |
68 } | |
69 } | |
70 if (old_object == VerificationType::uninitialized_this_type()) { | |
71 // "this" has been initialized - reset flags | |
72 _flags = 0; | |
73 } | |
74 } | |
75 | |
76 VerificationType StackMapFrame::set_locals_from_arg( | |
77 const methodHandle m, VerificationType thisKlass, TRAPS) { | |
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78 SignatureStream ss(m->signature()); |
0 | 79 int init_local_num = 0; |
80 if (!m->is_static()) { | |
81 init_local_num++; | |
82 // add one extra argument for instance method | |
83 if (m->name() == vmSymbols::object_initializer_name() && | |
84 thisKlass.name() != vmSymbols::java_lang_Object()) { | |
85 _locals[0] = VerificationType::uninitialized_this_type(); | |
86 _flags |= FLAG_THIS_UNINIT; | |
87 } else { | |
88 _locals[0] = thisKlass; | |
89 } | |
90 } | |
91 | |
92 // local num may be greater than size of parameters because long/double occupies two slots | |
93 while(!ss.at_return_type()) { | |
94 init_local_num += _verifier->change_sig_to_verificationType( | |
95 &ss, &_locals[init_local_num], | |
96 CHECK_VERIFY_(verifier(), VerificationType::bogus_type())); | |
97 ss.next(); | |
98 } | |
99 _locals_size = init_local_num; | |
100 | |
101 switch (ss.type()) { | |
102 case T_OBJECT: | |
103 case T_ARRAY: | |
104 { | |
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105 Symbol* sig = ss.as_symbol(CHECK_(VerificationType::bogus_type())); |
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106 // Create another symbol to save as signature stream unreferences |
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107 // this symbol. |
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108 Symbol* sig_copy = |
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109 verifier()->create_temporary_symbol(sig, 0, sig->utf8_length(), |
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110 CHECK_(VerificationType::bogus_type())); |
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111 assert(sig_copy == sig, "symbols don't match"); |
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112 return VerificationType::reference_type(sig_copy); |
0 | 113 } |
114 case T_INT: return VerificationType::integer_type(); | |
115 case T_BYTE: return VerificationType::byte_type(); | |
116 case T_CHAR: return VerificationType::char_type(); | |
117 case T_SHORT: return VerificationType::short_type(); | |
118 case T_BOOLEAN: return VerificationType::boolean_type(); | |
119 case T_FLOAT: return VerificationType::float_type(); | |
120 case T_DOUBLE: return VerificationType::double_type(); | |
121 case T_LONG: return VerificationType::long_type(); | |
122 case T_VOID: return VerificationType::bogus_type(); | |
123 default: | |
124 ShouldNotReachHere(); | |
125 } | |
126 return VerificationType::bogus_type(); | |
127 } | |
128 | |
129 void StackMapFrame::copy_locals(const StackMapFrame* src) { | |
130 int32_t len = src->locals_size() < _locals_size ? | |
131 src->locals_size() : _locals_size; | |
132 for (int32_t i = 0; i < len; i++) { | |
133 _locals[i] = src->locals()[i]; | |
134 } | |
135 } | |
136 | |
137 void StackMapFrame::copy_stack(const StackMapFrame* src) { | |
138 int32_t len = src->stack_size() < _stack_size ? | |
139 src->stack_size() : _stack_size; | |
140 for (int32_t i = 0; i < len; i++) { | |
141 _stack[i] = src->stack()[i]; | |
142 } | |
143 } | |
144 | |
6605 | 145 // Returns the location of the first mismatch, or 'len' if there are no |
146 // mismatches | |
147 int StackMapFrame::is_assignable_to( | |
0 | 148 VerificationType* from, VerificationType* to, int32_t len, TRAPS) const { |
6605 | 149 int32_t i = 0; |
150 for (i = 0; i < len; i++) { | |
18052 | 151 if (!to[i].is_assignable_from(from[i], verifier(), false, THREAD)) { |
6605 | 152 break; |
0 | 153 } |
154 } | |
6605 | 155 return i; |
0 | 156 } |
157 | |
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158 bool StackMapFrame::has_flag_match_exception( |
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159 const StackMapFrame* target) const { |
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160 // We allow flags of {UninitThis} to assign to {} if-and-only-if the |
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161 // target frame does not depend upon the current type. |
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162 // This is slightly too strict, as we need only enforce that the |
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163 // slots that were initialized by the <init> (the things that were |
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164 // UninitializedThis before initialize_object() converted them) are unused. |
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165 // However we didn't save that information so we'll enforce this upon |
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166 // anything that might have been initialized. This is a rare situation |
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167 // and javac never generates code that would end up here, but some profilers |
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168 // (such as NetBeans) might, when adding exception handlers in <init> |
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169 // methods to cover the invokespecial instruction. See 7020118. |
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170 |
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171 assert(max_locals() == target->max_locals() && |
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172 stack_size() == target->stack_size(), "StackMap sizes must match"); |
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173 |
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174 VerificationType top = VerificationType::top_type(); |
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175 VerificationType this_type = verifier()->current_type(); |
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176 |
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177 if (!flag_this_uninit() || target->flags() != 0) { |
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178 return false; |
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179 } |
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180 |
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181 for (int i = 0; i < target->locals_size(); ++i) { |
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182 if (locals()[i] == this_type && target->locals()[i] != top) { |
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183 return false; |
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184 } |
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185 } |
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186 |
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187 for (int i = 0; i < target->stack_size(); ++i) { |
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188 if (stack()[i] == this_type && target->stack()[i] != top) { |
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189 return false; |
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190 } |
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191 } |
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192 |
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193 return true; |
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194 } |
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195 |
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196 bool StackMapFrame::is_assignable_to( |
6605 | 197 const StackMapFrame* target, bool is_exception_handler, |
198 ErrorContext* ctx, TRAPS) const { | |
199 if (_max_locals != target->max_locals()) { | |
200 *ctx = ErrorContext::locals_size_mismatch( | |
201 _offset, (StackMapFrame*)this, (StackMapFrame*)target); | |
202 return false; | |
203 } | |
204 if (_stack_size != target->stack_size()) { | |
205 *ctx = ErrorContext::stack_size_mismatch( | |
206 _offset, (StackMapFrame*)this, (StackMapFrame*)target); | |
0 | 207 return false; |
208 } | |
209 // Only need to compare type elements up to target->locals() or target->stack(). | |
210 // The remaining type elements in this state can be ignored because they are | |
211 // assignable to bogus type. | |
6605 | 212 int mismatch_loc; |
213 mismatch_loc = is_assignable_to( | |
214 _locals, target->locals(), target->locals_size(), THREAD); | |
215 if (mismatch_loc != target->locals_size()) { | |
216 *ctx = ErrorContext::bad_type(target->offset(), | |
217 TypeOrigin::local(mismatch_loc, (StackMapFrame*)this), | |
218 TypeOrigin::sm_local(mismatch_loc, (StackMapFrame*)target)); | |
219 return false; | |
220 } | |
221 mismatch_loc = is_assignable_to(_stack, target->stack(), _stack_size, THREAD); | |
222 if (mismatch_loc != _stack_size) { | |
223 *ctx = ErrorContext::bad_type(target->offset(), | |
224 TypeOrigin::stack(mismatch_loc, (StackMapFrame*)this), | |
225 TypeOrigin::sm_stack(mismatch_loc, (StackMapFrame*)target)); | |
226 return false; | |
227 } | |
228 | |
0 | 229 bool match_flags = (_flags | target->flags()) == target->flags(); |
6605 | 230 if (match_flags || is_exception_handler && has_flag_match_exception(target)) { |
231 return true; | |
232 } else { | |
233 *ctx = ErrorContext::bad_flags(target->offset(), | |
234 (StackMapFrame*)this, (StackMapFrame*)target); | |
235 return false; | |
236 } | |
0 | 237 } |
238 | |
239 VerificationType StackMapFrame::pop_stack_ex(VerificationType type, TRAPS) { | |
240 if (_stack_size <= 0) { | |
6605 | 241 verifier()->verify_error( |
242 ErrorContext::stack_underflow(_offset, this), | |
243 "Operand stack underflow"); | |
0 | 244 return VerificationType::bogus_type(); |
245 } | |
246 VerificationType top = _stack[--_stack_size]; | |
247 bool subtype = type.is_assignable_from( | |
18052 | 248 top, verifier(), false, CHECK_(VerificationType::bogus_type())); |
0 | 249 if (!subtype) { |
6605 | 250 verifier()->verify_error( |
251 ErrorContext::bad_type(_offset, stack_top_ctx(), | |
252 TypeOrigin::implicit(type)), | |
253 "Bad type on operand stack"); | |
0 | 254 return VerificationType::bogus_type(); |
255 } | |
256 return top; | |
257 } | |
258 | |
259 VerificationType StackMapFrame::get_local( | |
260 int32_t index, VerificationType type, TRAPS) { | |
261 if (index >= _max_locals) { | |
6605 | 262 verifier()->verify_error( |
263 ErrorContext::bad_local_index(_offset, index), | |
264 "Local variable table overflow"); | |
0 | 265 return VerificationType::bogus_type(); |
266 } | |
267 bool subtype = type.is_assignable_from(_locals[index], | |
18052 | 268 verifier(), false, CHECK_(VerificationType::bogus_type())); |
0 | 269 if (!subtype) { |
6605 | 270 verifier()->verify_error( |
271 ErrorContext::bad_type(_offset, | |
272 TypeOrigin::local(index, this), | |
273 TypeOrigin::implicit(type)), | |
274 "Bad local variable type"); | |
0 | 275 return VerificationType::bogus_type(); |
276 } | |
277 if(index >= _locals_size) { _locals_size = index + 1; } | |
278 return _locals[index]; | |
279 } | |
280 | |
281 void StackMapFrame::get_local_2( | |
282 int32_t index, VerificationType type1, VerificationType type2, TRAPS) { | |
283 assert(type1.is_long() || type1.is_double(), "must be long/double"); | |
284 assert(type2.is_long2() || type2.is_double2(), "must be long/double_2"); | |
285 if (index >= _locals_size - 1) { | |
6605 | 286 verifier()->verify_error( |
287 ErrorContext::bad_local_index(_offset, index), | |
288 "get long/double overflows locals"); | |
0 | 289 return; |
290 } | |
18052 | 291 bool subtype = type1.is_assignable_from(_locals[index], verifier(), false, CHECK); |
6605 | 292 if (!subtype) { |
293 verifier()->verify_error( | |
294 ErrorContext::bad_type(_offset, | |
295 TypeOrigin::local(index, this), TypeOrigin::implicit(type1)), | |
296 "Bad local variable type"); | |
297 } else { | |
18052 | 298 subtype = type2.is_assignable_from(_locals[index + 1], verifier(), false, CHECK); |
6605 | 299 if (!subtype) { |
300 /* Unreachable? All local store routines convert a split long or double | |
301 * into a TOP during the store. So we should never end up seeing an | |
302 * orphaned half. */ | |
303 verifier()->verify_error( | |
304 ErrorContext::bad_type(_offset, | |
305 TypeOrigin::local(index + 1, this), TypeOrigin::implicit(type2)), | |
306 "Bad local variable type"); | |
307 } | |
0 | 308 } |
309 } | |
310 | |
311 void StackMapFrame::set_local(int32_t index, VerificationType type, TRAPS) { | |
312 assert(!type.is_check(), "Must be a real type"); | |
313 if (index >= _max_locals) { | |
6605 | 314 verifier()->verify_error( |
315 ErrorContext::bad_local_index(_offset, index), | |
316 "Local variable table overflow"); | |
0 | 317 return; |
318 } | |
319 // If type at index is double or long, set the next location to be unusable | |
320 if (_locals[index].is_double() || _locals[index].is_long()) { | |
321 assert((index + 1) < _locals_size, "Local variable table overflow"); | |
322 _locals[index + 1] = VerificationType::bogus_type(); | |
323 } | |
324 // If type at index is double_2 or long_2, set the previous location to be unusable | |
325 if (_locals[index].is_double2() || _locals[index].is_long2()) { | |
326 assert(index >= 1, "Local variable table underflow"); | |
327 _locals[index - 1] = VerificationType::bogus_type(); | |
328 } | |
329 _locals[index] = type; | |
330 if (index >= _locals_size) { | |
331 #ifdef ASSERT | |
332 for (int i=_locals_size; i<index; i++) { | |
333 assert(_locals[i] == VerificationType::bogus_type(), | |
334 "holes must be bogus type"); | |
335 } | |
336 #endif | |
337 _locals_size = index + 1; | |
338 } | |
339 } | |
340 | |
341 void StackMapFrame::set_local_2( | |
342 int32_t index, VerificationType type1, VerificationType type2, TRAPS) { | |
343 assert(type1.is_long() || type1.is_double(), "must be long/double"); | |
344 assert(type2.is_long2() || type2.is_double2(), "must be long/double_2"); | |
345 if (index >= _max_locals - 1) { | |
6605 | 346 verifier()->verify_error( |
347 ErrorContext::bad_local_index(_offset, index), | |
348 "Local variable table overflow"); | |
0 | 349 return; |
350 } | |
351 // If type at index+1 is double or long, set the next location to be unusable | |
352 if (_locals[index+1].is_double() || _locals[index+1].is_long()) { | |
353 assert((index + 2) < _locals_size, "Local variable table overflow"); | |
354 _locals[index + 2] = VerificationType::bogus_type(); | |
355 } | |
356 // If type at index is double_2 or long_2, set the previous location to be unusable | |
357 if (_locals[index].is_double2() || _locals[index].is_long2()) { | |
358 assert(index >= 1, "Local variable table underflow"); | |
359 _locals[index - 1] = VerificationType::bogus_type(); | |
360 } | |
361 _locals[index] = type1; | |
362 _locals[index+1] = type2; | |
363 if (index >= _locals_size - 1) { | |
364 #ifdef ASSERT | |
365 for (int i=_locals_size; i<index; i++) { | |
366 assert(_locals[i] == VerificationType::bogus_type(), | |
367 "holes must be bogus type"); | |
368 } | |
369 #endif | |
370 _locals_size = index + 2; | |
371 } | |
372 } | |
373 | |
6605 | 374 TypeOrigin StackMapFrame::stack_top_ctx() { |
375 return TypeOrigin::stack(_stack_size, this); | |
0 | 376 } |
377 | |
6605 | 378 void StackMapFrame::print_on(outputStream* str) const { |
379 str->indent().print_cr("bci: @%d", _offset); | |
380 str->indent().print_cr("flags: {%s }", | |
381 flag_this_uninit() ? " flagThisUninit" : ""); | |
382 str->indent().print("locals: {"); | |
383 for (int32_t i = 0; i < _locals_size; ++i) { | |
384 str->print(" "); | |
385 _locals[i].print_on(str); | |
386 if (i != _locals_size - 1) { | |
387 str->print(","); | |
388 } | |
389 } | |
390 str->print_cr(" }"); | |
391 str->indent().print("stack: {"); | |
392 for (int32_t j = 0; j < _stack_size; ++j) { | |
393 str->print(" "); | |
394 _stack[j].print_on(str); | |
395 if (j != _stack_size - 1) { | |
396 str->print(","); | |
397 } | |
398 } | |
399 str->print_cr(" }"); | |
400 } |