Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/stackMapFrame.cpp @ 20527:8cb56c8cb30d
Merge
| author | jiangli |
|---|---|
| date | Mon, 15 Sep 2014 16:39:00 -0400 |
| parents | b2daaf70fab2 c77d5db18942 |
| children |
| rev | line source |
|---|---|
| 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 #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 } |