Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.cpp @ 13257:4eacfd0767ed
get deoptimization constants in HotSpotMetaAccessProvider from HotSpotVMConfig
author | twisti |
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date | Thu, 05 Dec 2013 19:28:30 -0800 |
parents | 7114c4597ae3 |
children | cdf20166ec45 |
rev | line source |
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0 | 1 /* |
8060 | 2 * Copyright (c) 1998, 2013, 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/classFileStream.hpp" | |
27 #include "classfile/javaClasses.hpp" | |
28 #include "classfile/stackMapTable.hpp" | |
6605 | 29 #include "classfile/stackMapFrame.hpp" |
30 #include "classfile/stackMapTableFormat.hpp" | |
1972 | 31 #include "classfile/systemDictionary.hpp" |
32 #include "classfile/verifier.hpp" | |
33 #include "classfile/vmSymbols.hpp" | |
6605 | 34 #include "interpreter/bytecodes.hpp" |
1972 | 35 #include "interpreter/bytecodeStream.hpp" |
36 #include "memory/oopFactory.hpp" | |
37 #include "memory/resourceArea.hpp" | |
38 #include "oops/instanceKlass.hpp" | |
39 #include "oops/oop.inline.hpp" | |
40 #include "oops/typeArrayOop.hpp" | |
41 #include "prims/jvm.h" | |
42 #include "runtime/fieldDescriptor.hpp" | |
43 #include "runtime/handles.inline.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/javaCalls.hpp" | |
46 #include "runtime/orderAccess.hpp" | |
47 #include "runtime/os.hpp" | |
48 #ifdef TARGET_ARCH_x86 | |
49 # include "bytes_x86.hpp" | |
50 #endif | |
51 #ifdef TARGET_ARCH_sparc | |
52 # include "bytes_sparc.hpp" | |
53 #endif | |
54 #ifdef TARGET_ARCH_zero | |
55 # include "bytes_zero.hpp" | |
56 #endif | |
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57 #ifdef TARGET_ARCH_arm |
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58 # include "bytes_arm.hpp" |
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59 #endif |
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60 #ifdef TARGET_ARCH_ppc |
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61 # include "bytes_ppc.hpp" |
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62 #endif |
0 | 63 |
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64 #define NOFAILOVER_MAJOR_VERSION 51 |
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65 #define NONZERO_PADDING_BYTES_IN_SWITCH_MAJOR_VERSION 51 |
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66 #define STATIC_METHOD_IN_INTERFACE_MAJOR_VERSION 52 |
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67 |
0 | 68 // Access to external entry for VerifyClassCodes - old byte code verifier |
69 | |
70 extern "C" { | |
71 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
72 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
73 } | |
74 | |
75 static void* volatile _verify_byte_codes_fn = NULL; | |
76 | |
77 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
78 | |
79 static void* verify_byte_codes_fn() { | |
80 if (_verify_byte_codes_fn == NULL) { | |
81 void *lib_handle = os::native_java_library(); | |
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82 void *func = os::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); |
0 | 83 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
84 if (func == NULL) { | |
85 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
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86 func = os::dll_lookup(lib_handle, "VerifyClassCodes"); |
0 | 87 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
88 } | |
89 } | |
90 return (void*)_verify_byte_codes_fn; | |
91 } | |
92 | |
93 | |
94 // Methods in Verifier | |
95 | |
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96 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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97 return (class_loader == NULL || !should_verify_class) ? |
0 | 98 BytecodeVerificationLocal : BytecodeVerificationRemote; |
99 } | |
100 | |
101 bool Verifier::relax_verify_for(oop loader) { | |
102 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
103 bool need_verify = | |
104 // verifyAll | |
105 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
106 // verifyRemote | |
107 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
108 return !need_verify; | |
109 } | |
110 | |
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111 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
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112 HandleMark hm; |
0 | 113 ResourceMark rm(THREAD); |
114 | |
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115 Symbol* exception_name = NULL; |
0 | 116 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; |
117 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
6605 | 118 char* exception_message = message_buffer; |
0 | 119 |
120 const char* klassName = klass->external_name(); | |
6605 | 121 bool can_failover = FailOverToOldVerifier && |
122 klass->major_version() < NOFAILOVER_MAJOR_VERSION; | |
0 | 123 |
124 // If the class should be verified, first see if we can use the split | |
125 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
126 // is set, then call the inference verifier. | |
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127 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 128 if (TraceClassInitialization) { |
129 tty->print_cr("Start class verification for: %s", klassName); | |
130 } | |
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131 if (klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { |
6605 | 132 ClassVerifier split_verifier(klass, THREAD); |
133 split_verifier.verify_class(THREAD); | |
134 exception_name = split_verifier.result(); | |
135 if (can_failover && !HAS_PENDING_EXCEPTION && | |
0 | 136 (exception_name == vmSymbols::java_lang_VerifyError() || |
137 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
6605 | 138 if (TraceClassInitialization || VerboseVerification) { |
0 | 139 tty->print_cr( |
140 "Fail over class verification to old verifier for: %s", klassName); | |
141 } | |
142 exception_name = inference_verify( | |
143 klass, message_buffer, message_buffer_len, THREAD); | |
144 } | |
6605 | 145 if (exception_name != NULL) { |
146 exception_message = split_verifier.exception_message(); | |
147 } | |
0 | 148 } else { |
149 exception_name = inference_verify( | |
150 klass, message_buffer, message_buffer_len, THREAD); | |
151 } | |
152 | |
6605 | 153 if (TraceClassInitialization || VerboseVerification) { |
0 | 154 if (HAS_PENDING_EXCEPTION) { |
155 tty->print("Verification for %s has", klassName); | |
156 tty->print_cr(" exception pending %s ", | |
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157 InstanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); |
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158 } else if (exception_name != NULL) { |
0 | 159 tty->print_cr("Verification for %s failed", klassName); |
160 } | |
161 tty->print_cr("End class verification for: %s", klassName); | |
162 } | |
163 } | |
164 | |
165 if (HAS_PENDING_EXCEPTION) { | |
166 return false; // use the existing exception | |
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167 } else if (exception_name == NULL) { |
0 | 168 return true; // verifcation succeeded |
169 } else { // VerifyError or ClassFormatError to be created and thrown | |
170 ResourceMark rm(THREAD); | |
171 instanceKlassHandle kls = | |
172 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
173 while (!kls.is_null()) { | |
174 if (kls == klass) { | |
175 // If the class being verified is the exception we're creating | |
176 // or one of it's superclasses, we're in trouble and are going | |
177 // to infinitely recurse when we try to initialize the exception. | |
178 // So bail out here by throwing the preallocated VM error. | |
179 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
180 } | |
181 kls = kls->super(); | |
182 } | |
183 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
6605 | 184 THROW_MSG_(exception_name, exception_message, false); |
0 | 185 } |
186 } | |
187 | |
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188 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
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189 Symbol* name = klass->name(); |
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190 Klass* refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
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191 Klass* lambda_magic_klass = SystemDictionary::lambda_MagicLambdaImpl_klass(); |
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192 |
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193 bool is_reflect = refl_magic_klass != NULL && klass->is_subtype_of(refl_magic_klass); |
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194 bool is_lambda = lambda_magic_klass != NULL && klass->is_subtype_of(lambda_magic_klass); |
0 | 195 |
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196 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 197 // return if the class is a bootstrapping class |
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198 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 199 // We need to skip the following four for bootstraping |
200 name != vmSymbols::java_lang_Object() && | |
201 name != vmSymbols::java_lang_Class() && | |
202 name != vmSymbols::java_lang_String() && | |
203 name != vmSymbols::java_lang_Throwable() && | |
204 | |
205 // Can not verify the bytecodes for shared classes because they have | |
206 // already been rewritten to contain constant pool cache indices, | |
207 // which the verifier can't understand. | |
208 // Shared classes shouldn't have stackmaps either. | |
209 !klass()->is_shared() && | |
210 | |
211 // As of the fix for 4486457 we disable verification for all of the | |
212 // dynamically-generated bytecodes associated with the 1.4 | |
213 // reflection implementation, not just those associated with | |
214 // sun/reflect/SerializationConstructorAccessor. | |
215 // NOTE: this is called too early in the bootstrapping process to be | |
216 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
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217 // Also for lambda generated code, gte jdk8 |
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218 (!is_reflect || VerifyReflectionBytecodes) && |
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219 (!is_lambda || VerifyLambdaBytecodes) |
0 | 220 ); |
221 } | |
222 | |
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223 Symbol* Verifier::inference_verify( |
0 | 224 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { |
225 JavaThread* thread = (JavaThread*)THREAD; | |
226 JNIEnv *env = thread->jni_environment(); | |
227 | |
228 void* verify_func = verify_byte_codes_fn(); | |
229 | |
230 if (verify_func == NULL) { | |
231 jio_snprintf(message, message_len, "Could not link verifier"); | |
232 return vmSymbols::java_lang_VerifyError(); | |
233 } | |
234 | |
235 ResourceMark rm(THREAD); | |
6605 | 236 if (VerboseVerification) { |
0 | 237 tty->print_cr("Verifying class %s with old format", klass->external_name()); |
238 } | |
239 | |
240 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
241 jint result; | |
242 | |
243 { | |
244 HandleMark hm(thread); | |
245 ThreadToNativeFromVM ttn(thread); | |
246 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
247 // code knows that we have left the VM | |
248 | |
249 if (_is_new_verify_byte_codes_fn) { | |
250 verify_byte_codes_fn_new_t func = | |
251 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
252 result = (*func)(env, cls, message, (int)message_len, | |
253 klass->major_version()); | |
254 } else { | |
255 verify_byte_codes_fn_t func = | |
256 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
257 result = (*func)(env, cls, message, (int)message_len); | |
258 } | |
259 } | |
260 | |
261 JNIHandles::destroy_local(cls); | |
262 | |
263 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
264 // to be changed (still return jboolean (unsigned char)), and result is | |
265 // 1 when verification is passed. | |
266 if (result == 0) { | |
267 return vmSymbols::java_lang_VerifyError(); | |
268 } else if (result == 1) { | |
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269 return NULL; // verified. |
0 | 270 } else if (result == 2) { |
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271 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, NULL); |
0 | 272 } else if (result == 3) { |
273 return vmSymbols::java_lang_ClassFormatError(); | |
274 } else { | |
275 ShouldNotReachHere(); | |
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276 return NULL; |
0 | 277 } |
278 } | |
279 | |
6605 | 280 TypeOrigin TypeOrigin::null() { |
281 return TypeOrigin(); | |
282 } | |
283 TypeOrigin TypeOrigin::local(u2 index, StackMapFrame* frame) { | |
284 assert(frame != NULL, "Must have a frame"); | |
285 return TypeOrigin(CF_LOCALS, index, StackMapFrame::copy(frame), | |
286 frame->local_at(index)); | |
287 } | |
288 TypeOrigin TypeOrigin::stack(u2 index, StackMapFrame* frame) { | |
289 assert(frame != NULL, "Must have a frame"); | |
290 return TypeOrigin(CF_STACK, index, StackMapFrame::copy(frame), | |
291 frame->stack_at(index)); | |
292 } | |
293 TypeOrigin TypeOrigin::sm_local(u2 index, StackMapFrame* frame) { | |
294 assert(frame != NULL, "Must have a frame"); | |
295 return TypeOrigin(SM_LOCALS, index, StackMapFrame::copy(frame), | |
296 frame->local_at(index)); | |
297 } | |
298 TypeOrigin TypeOrigin::sm_stack(u2 index, StackMapFrame* frame) { | |
299 assert(frame != NULL, "Must have a frame"); | |
300 return TypeOrigin(SM_STACK, index, StackMapFrame::copy(frame), | |
301 frame->stack_at(index)); | |
302 } | |
303 TypeOrigin TypeOrigin::bad_index(u2 index) { | |
304 return TypeOrigin(BAD_INDEX, index, NULL, VerificationType::bogus_type()); | |
305 } | |
306 TypeOrigin TypeOrigin::cp(u2 index, VerificationType vt) { | |
307 return TypeOrigin(CONST_POOL, index, NULL, vt); | |
308 } | |
309 TypeOrigin TypeOrigin::signature(VerificationType vt) { | |
310 return TypeOrigin(SIG, 0, NULL, vt); | |
311 } | |
312 TypeOrigin TypeOrigin::implicit(VerificationType t) { | |
313 return TypeOrigin(IMPLICIT, 0, NULL, t); | |
314 } | |
315 TypeOrigin TypeOrigin::frame(StackMapFrame* frame) { | |
316 return TypeOrigin(FRAME_ONLY, 0, StackMapFrame::copy(frame), | |
317 VerificationType::bogus_type()); | |
318 } | |
319 | |
320 void TypeOrigin::reset_frame() { | |
321 if (_frame != NULL) { | |
322 _frame->restore(); | |
323 } | |
324 } | |
325 | |
326 void TypeOrigin::details(outputStream* ss) const { | |
327 _type.print_on(ss); | |
328 switch (_origin) { | |
329 case CF_LOCALS: | |
330 ss->print(" (current frame, locals[%d])", _index); | |
331 break; | |
332 case CF_STACK: | |
333 ss->print(" (current frame, stack[%d])", _index); | |
334 break; | |
335 case SM_LOCALS: | |
336 ss->print(" (stack map, locals[%d])", _index); | |
337 break; | |
338 case SM_STACK: | |
339 ss->print(" (stack map, stack[%d])", _index); | |
340 break; | |
341 case CONST_POOL: | |
342 ss->print(" (constant pool %d)", _index); | |
343 break; | |
344 case SIG: | |
345 ss->print(" (from method signature)"); | |
346 break; | |
347 case IMPLICIT: | |
348 case FRAME_ONLY: | |
349 case NONE: | |
350 default: | |
351 ; | |
352 } | |
353 } | |
354 | |
355 #ifdef ASSERT | |
356 void TypeOrigin::print_on(outputStream* str) const { | |
357 str->print("{%d,%d,%p:", _origin, _index, _frame); | |
358 if (_frame != NULL) { | |
359 _frame->print_on(str); | |
360 } else { | |
361 str->print("null"); | |
362 } | |
363 str->print(","); | |
364 _type.print_on(str); | |
365 str->print("}"); | |
366 } | |
367 #endif | |
368 | |
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369 void ErrorContext::details(outputStream* ss, const Method* method) const { |
6605 | 370 if (is_valid()) { |
371 ss->print_cr(""); | |
372 ss->print_cr("Exception Details:"); | |
373 location_details(ss, method); | |
374 reason_details(ss); | |
375 frame_details(ss); | |
376 bytecode_details(ss, method); | |
377 handler_details(ss, method); | |
378 stackmap_details(ss, method); | |
379 } | |
380 } | |
381 | |
382 void ErrorContext::reason_details(outputStream* ss) const { | |
383 streamIndentor si(ss); | |
384 ss->indent().print_cr("Reason:"); | |
385 streamIndentor si2(ss); | |
386 ss->indent().print(""); | |
387 switch (_fault) { | |
388 case INVALID_BYTECODE: | |
389 ss->print("Error exists in the bytecode"); | |
390 break; | |
391 case WRONG_TYPE: | |
392 if (_expected.is_valid()) { | |
393 ss->print("Type "); | |
394 _type.details(ss); | |
395 ss->print(" is not assignable to "); | |
396 _expected.details(ss); | |
397 } else { | |
398 ss->print("Invalid type: "); | |
399 _type.details(ss); | |
400 } | |
401 break; | |
402 case FLAGS_MISMATCH: | |
403 if (_expected.is_valid()) { | |
404 ss->print("Current frame's flags are not assignable " | |
405 "to stack map frame's."); | |
406 } else { | |
407 ss->print("Current frame's flags are invalid in this context."); | |
408 } | |
409 break; | |
410 case BAD_CP_INDEX: | |
411 ss->print("Constant pool index %d is invalid", _type.index()); | |
412 break; | |
413 case BAD_LOCAL_INDEX: | |
414 ss->print("Local index %d is invalid", _type.index()); | |
415 break; | |
416 case LOCALS_SIZE_MISMATCH: | |
417 ss->print("Current frame's local size doesn't match stackmap."); | |
418 break; | |
419 case STACK_SIZE_MISMATCH: | |
420 ss->print("Current frame's stack size doesn't match stackmap."); | |
421 break; | |
422 case STACK_OVERFLOW: | |
423 ss->print("Exceeded max stack size."); | |
424 break; | |
425 case STACK_UNDERFLOW: | |
426 ss->print("Attempt to pop empty stack."); | |
427 break; | |
428 case MISSING_STACKMAP: | |
429 ss->print("Expected stackmap frame at this location."); | |
430 break; | |
431 case BAD_STACKMAP: | |
432 ss->print("Invalid stackmap specification."); | |
433 break; | |
434 case UNKNOWN: | |
435 default: | |
436 ShouldNotReachHere(); | |
437 ss->print_cr("Unknown"); | |
438 } | |
439 ss->print_cr(""); | |
440 } | |
441 | |
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442 void ErrorContext::location_details(outputStream* ss, const Method* method) const { |
6605 | 443 if (_bci != -1 && method != NULL) { |
444 streamIndentor si(ss); | |
445 const char* bytecode_name = "<invalid>"; | |
446 if (method->validate_bci_from_bcx(_bci) != -1) { | |
447 Bytecodes::Code code = Bytecodes::code_or_bp_at(method->bcp_from(_bci)); | |
448 if (Bytecodes::is_defined(code)) { | |
449 bytecode_name = Bytecodes::name(code); | |
450 } else { | |
451 bytecode_name = "<illegal>"; | |
452 } | |
453 } | |
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454 InstanceKlass* ik = method->method_holder(); |
6605 | 455 ss->indent().print_cr("Location:"); |
456 streamIndentor si2(ss); | |
457 ss->indent().print_cr("%s.%s%s @%d: %s", | |
458 ik->name()->as_C_string(), method->name()->as_C_string(), | |
459 method->signature()->as_C_string(), _bci, bytecode_name); | |
460 } | |
461 } | |
462 | |
463 void ErrorContext::frame_details(outputStream* ss) const { | |
464 streamIndentor si(ss); | |
465 if (_type.is_valid() && _type.frame() != NULL) { | |
466 ss->indent().print_cr("Current Frame:"); | |
467 streamIndentor si2(ss); | |
468 _type.frame()->print_on(ss); | |
469 } | |
470 if (_expected.is_valid() && _expected.frame() != NULL) { | |
471 ss->indent().print_cr("Stackmap Frame:"); | |
472 streamIndentor si2(ss); | |
473 _expected.frame()->print_on(ss); | |
474 } | |
475 } | |
476 | |
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477 void ErrorContext::bytecode_details(outputStream* ss, const Method* method) const { |
6605 | 478 if (method != NULL) { |
479 streamIndentor si(ss); | |
480 ss->indent().print_cr("Bytecode:"); | |
481 streamIndentor si2(ss); | |
482 ss->print_data(method->code_base(), method->code_size(), false); | |
483 } | |
484 } | |
485 | |
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486 void ErrorContext::handler_details(outputStream* ss, const Method* method) const { |
6605 | 487 if (method != NULL) { |
488 streamIndentor si(ss); | |
489 ExceptionTable table(method); | |
490 if (table.length() > 0) { | |
491 ss->indent().print_cr("Exception Handler Table:"); | |
492 streamIndentor si2(ss); | |
493 for (int i = 0; i < table.length(); ++i) { | |
494 ss->indent().print_cr("bci [%d, %d] => handler: %d", table.start_pc(i), | |
495 table.end_pc(i), table.handler_pc(i)); | |
496 } | |
497 } | |
498 } | |
499 } | |
500 | |
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501 void ErrorContext::stackmap_details(outputStream* ss, const Method* method) const { |
6605 | 502 if (method != NULL && method->has_stackmap_table()) { |
503 streamIndentor si(ss); | |
504 ss->indent().print_cr("Stackmap Table:"); | |
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505 Array<u1>* data = method->stackmap_data(); |
6605 | 506 stack_map_table* sm_table = |
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507 stack_map_table::at((address)data->adr_at(0)); |
6605 | 508 stack_map_frame* sm_frame = sm_table->entries(); |
509 streamIndentor si2(ss); | |
510 int current_offset = -1; | |
511 for (u2 i = 0; i < sm_table->number_of_entries(); ++i) { | |
512 ss->indent(); | |
513 sm_frame->print_on(ss, current_offset); | |
514 ss->print_cr(""); | |
515 current_offset += sm_frame->offset_delta(); | |
516 sm_frame = sm_frame->next(); | |
517 } | |
518 } | |
519 } | |
520 | |
0 | 521 // Methods in ClassVerifier |
522 | |
523 ClassVerifier::ClassVerifier( | |
6605 | 524 instanceKlassHandle klass, TRAPS) |
525 : _thread(THREAD), _exception_type(NULL), _message(NULL), _klass(klass) { | |
0 | 526 _this_type = VerificationType::reference_type(klass->name()); |
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527 // Create list to hold symbols in reference area. |
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528 _symbols = new GrowableArray<Symbol*>(100, 0, NULL); |
0 | 529 } |
530 | |
531 ClassVerifier::~ClassVerifier() { | |
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532 // Decrement the reference count for any symbols created. |
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533 for (int i = 0; i < _symbols->length(); i++) { |
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534 Symbol* s = _symbols->at(i); |
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535 s->decrement_refcount(); |
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536 } |
0 | 537 } |
538 | |
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539 VerificationType ClassVerifier::object_type() const { |
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540 return VerificationType::reference_type(vmSymbols::java_lang_Object()); |
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541 } |
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542 |
6605 | 543 TypeOrigin ClassVerifier::ref_ctx(const char* sig, TRAPS) { |
544 VerificationType vt = VerificationType::reference_type( | |
545 create_temporary_symbol(sig, (int)strlen(sig), THREAD)); | |
546 return TypeOrigin::implicit(vt); | |
547 } | |
548 | |
0 | 549 void ClassVerifier::verify_class(TRAPS) { |
6605 | 550 if (VerboseVerification) { |
0 | 551 tty->print_cr("Verifying class %s with new format", |
552 _klass->external_name()); | |
553 } | |
554 | |
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555 Array<Method*>* methods = _klass->methods(); |
0 | 556 int num_methods = methods->length(); |
557 | |
558 for (int index = 0; index < num_methods; index++) { | |
1570 | 559 // Check for recursive re-verification before each method. |
560 if (was_recursively_verified()) return; | |
561 | |
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562 Method* m = methods->at(index); |
6934 | 563 if (m->is_native() || m->is_abstract() || m->is_overpass()) { |
0 | 564 // If m is native or abstract, skip it. It is checked in class file |
6934 | 565 // parser that methods do not override a final method. Overpass methods |
566 // are trusted since the VM generates them. | |
0 | 567 continue; |
568 } | |
569 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
570 } | |
1570 | 571 |
6605 | 572 if (VerboseVerification || TraceClassInitialization) { |
1570 | 573 if (was_recursively_verified()) |
574 tty->print_cr("Recursive verification detected for: %s", | |
575 _klass->external_name()); | |
576 } | |
0 | 577 } |
578 | |
579 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
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580 HandleMark hm(THREAD); |
0 | 581 _method = m; // initialize _method |
6605 | 582 if (VerboseVerification) { |
0 | 583 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); |
584 } | |
585 | |
586 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
587 | |
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588 int32_t max_stack = m->verifier_max_stack(); |
0 | 589 int32_t max_locals = m->max_locals(); |
590 constantPoolHandle cp(THREAD, m->constants()); | |
591 | |
592 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
593 class_format_error("Invalid method signature"); | |
594 return; | |
595 } | |
596 | |
597 // Initial stack map frame: offset is 0, stack is initially empty. | |
598 StackMapFrame current_frame(max_locals, max_stack, this); | |
599 // Set initial locals | |
600 VerificationType return_type = current_frame.set_locals_from_arg( | |
601 m, current_type(), CHECK_VERIFY(this)); | |
602 | |
603 int32_t stackmap_index = 0; // index to the stackmap array | |
604 | |
605 u4 code_length = m->code_size(); | |
606 | |
607 // Scan the bytecode and map each instruction's start offset to a number. | |
608 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
609 | |
610 int ex_min = code_length; | |
611 int ex_max = -1; | |
612 // Look through each item on the exception table. Each of the fields must refer | |
613 // to a legal instruction. | |
614 verify_exception_handler_table( | |
615 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
616 | |
617 // Look through each entry on the local variable table and make sure | |
618 // its range of code array offsets is valid. (4169817) | |
619 if (m->has_localvariable_table()) { | |
620 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
621 } | |
622 | |
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623 Array<u1>* stackmap_data = m->stackmap_data(); |
0 | 624 StackMapStream stream(stackmap_data); |
625 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
626 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
627 code_data, code_length, CHECK_VERIFY(this)); | |
628 | |
6605 | 629 if (VerboseVerification) { |
630 stackmap_table.print_on(tty); | |
0 | 631 } |
632 | |
633 RawBytecodeStream bcs(m); | |
634 | |
635 // Scan the byte code linearly from the start to the end | |
636 bool no_control_flow = false; // Set to true when there is no direct control | |
637 // flow from current instruction to the next | |
638 // instruction in sequence | |
639 Bytecodes::Code opcode; | |
640 while (!bcs.is_last_bytecode()) { | |
1570 | 641 // Check for recursive re-verification before each bytecode. |
642 if (was_recursively_verified()) return; | |
643 | |
0 | 644 opcode = bcs.raw_next(); |
645 u2 bci = bcs.bci(); | |
646 | |
647 // Set current frame's offset to bci | |
648 current_frame.set_offset(bci); | |
6605 | 649 current_frame.set_mark(); |
0 | 650 |
651 // Make sure every offset in stackmap table point to the beginning to | |
652 // an instruction. Match current_frame to stackmap_table entry with | |
653 // the same offset if exists. | |
654 stackmap_index = verify_stackmap_table( | |
655 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
656 no_control_flow, CHECK_VERIFY(this)); | |
657 | |
6605 | 658 |
0 | 659 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' |
660 | |
661 // Merge with the next instruction | |
662 { | |
663 u2 index; | |
664 int target; | |
665 VerificationType type, type2; | |
666 VerificationType atype; | |
667 | |
668 #ifndef PRODUCT | |
6605 | 669 if (VerboseVerification) { |
670 current_frame.print_on(tty); | |
0 | 671 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); |
672 } | |
673 #endif | |
674 | |
675 // Make sure wide instruction is in correct format | |
676 if (bcs.is_wide()) { | |
677 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
678 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
679 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
680 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
681 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
682 opcode != Bytecodes::_dstore) { | |
6605 | 683 /* Unreachable? RawBytecodeStream's raw_next() returns 'illegal' |
684 * if we encounter a wide instruction that modifies an invalid | |
685 * opcode (not one of the ones listed above) */ | |
686 verify_error(ErrorContext::bad_code(bci), "Bad wide instruction"); | |
0 | 687 return; |
688 } | |
689 } | |
690 | |
691 switch (opcode) { | |
692 case Bytecodes::_nop : | |
693 no_control_flow = false; break; | |
694 case Bytecodes::_aconst_null : | |
695 current_frame.push_stack( | |
696 VerificationType::null_type(), CHECK_VERIFY(this)); | |
697 no_control_flow = false; break; | |
698 case Bytecodes::_iconst_m1 : | |
699 case Bytecodes::_iconst_0 : | |
700 case Bytecodes::_iconst_1 : | |
701 case Bytecodes::_iconst_2 : | |
702 case Bytecodes::_iconst_3 : | |
703 case Bytecodes::_iconst_4 : | |
704 case Bytecodes::_iconst_5 : | |
705 current_frame.push_stack( | |
706 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
707 no_control_flow = false; break; | |
708 case Bytecodes::_lconst_0 : | |
709 case Bytecodes::_lconst_1 : | |
710 current_frame.push_stack_2( | |
711 VerificationType::long_type(), | |
712 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
713 no_control_flow = false; break; | |
714 case Bytecodes::_fconst_0 : | |
715 case Bytecodes::_fconst_1 : | |
716 case Bytecodes::_fconst_2 : | |
717 current_frame.push_stack( | |
718 VerificationType::float_type(), CHECK_VERIFY(this)); | |
719 no_control_flow = false; break; | |
720 case Bytecodes::_dconst_0 : | |
721 case Bytecodes::_dconst_1 : | |
722 current_frame.push_stack_2( | |
723 VerificationType::double_type(), | |
724 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
725 no_control_flow = false; break; | |
726 case Bytecodes::_sipush : | |
727 case Bytecodes::_bipush : | |
728 current_frame.push_stack( | |
729 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
730 no_control_flow = false; break; | |
731 case Bytecodes::_ldc : | |
732 verify_ldc( | |
1565 | 733 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 734 cp, bci, CHECK_VERIFY(this)); |
735 no_control_flow = false; break; | |
736 case Bytecodes::_ldc_w : | |
737 case Bytecodes::_ldc2_w : | |
738 verify_ldc( | |
1565 | 739 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 740 cp, bci, CHECK_VERIFY(this)); |
741 no_control_flow = false; break; | |
742 case Bytecodes::_iload : | |
743 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
744 no_control_flow = false; break; | |
745 case Bytecodes::_iload_0 : | |
746 case Bytecodes::_iload_1 : | |
747 case Bytecodes::_iload_2 : | |
748 case Bytecodes::_iload_3 : | |
749 index = opcode - Bytecodes::_iload_0; | |
750 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
751 no_control_flow = false; break; | |
752 case Bytecodes::_lload : | |
753 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
754 no_control_flow = false; break; | |
755 case Bytecodes::_lload_0 : | |
756 case Bytecodes::_lload_1 : | |
757 case Bytecodes::_lload_2 : | |
758 case Bytecodes::_lload_3 : | |
759 index = opcode - Bytecodes::_lload_0; | |
760 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
761 no_control_flow = false; break; | |
762 case Bytecodes::_fload : | |
763 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
764 no_control_flow = false; break; | |
765 case Bytecodes::_fload_0 : | |
766 case Bytecodes::_fload_1 : | |
767 case Bytecodes::_fload_2 : | |
768 case Bytecodes::_fload_3 : | |
769 index = opcode - Bytecodes::_fload_0; | |
770 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
771 no_control_flow = false; break; | |
772 case Bytecodes::_dload : | |
773 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
774 no_control_flow = false; break; | |
775 case Bytecodes::_dload_0 : | |
776 case Bytecodes::_dload_1 : | |
777 case Bytecodes::_dload_2 : | |
778 case Bytecodes::_dload_3 : | |
779 index = opcode - Bytecodes::_dload_0; | |
780 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
781 no_control_flow = false; break; | |
782 case Bytecodes::_aload : | |
783 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
784 no_control_flow = false; break; | |
785 case Bytecodes::_aload_0 : | |
786 case Bytecodes::_aload_1 : | |
787 case Bytecodes::_aload_2 : | |
788 case Bytecodes::_aload_3 : | |
789 index = opcode - Bytecodes::_aload_0; | |
790 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
791 no_control_flow = false; break; | |
792 case Bytecodes::_iaload : | |
793 type = current_frame.pop_stack( | |
794 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
795 atype = current_frame.pop_stack( | |
796 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
797 if (!atype.is_int_array()) { | |
6605 | 798 verify_error(ErrorContext::bad_type(bci, |
799 current_frame.stack_top_ctx(), ref_ctx("[I", THREAD)), | |
800 bad_type_msg, "iaload"); | |
0 | 801 return; |
802 } | |
803 current_frame.push_stack( | |
804 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
805 no_control_flow = false; break; | |
806 case Bytecodes::_baload : | |
807 type = current_frame.pop_stack( | |
808 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
809 atype = current_frame.pop_stack( | |
810 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
811 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
6605 | 812 verify_error( |
813 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
814 bad_type_msg, "baload"); | |
0 | 815 return; |
816 } | |
817 current_frame.push_stack( | |
818 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
819 no_control_flow = false; break; | |
820 case Bytecodes::_caload : | |
821 type = current_frame.pop_stack( | |
822 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
823 atype = current_frame.pop_stack( | |
824 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
825 if (!atype.is_char_array()) { | |
6605 | 826 verify_error(ErrorContext::bad_type(bci, |
827 current_frame.stack_top_ctx(), ref_ctx("[C", THREAD)), | |
828 bad_type_msg, "caload"); | |
0 | 829 return; |
830 } | |
831 current_frame.push_stack( | |
832 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
833 no_control_flow = false; break; | |
834 case Bytecodes::_saload : | |
835 type = current_frame.pop_stack( | |
836 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
837 atype = current_frame.pop_stack( | |
838 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
839 if (!atype.is_short_array()) { | |
6605 | 840 verify_error(ErrorContext::bad_type(bci, |
841 current_frame.stack_top_ctx(), ref_ctx("[S", THREAD)), | |
842 bad_type_msg, "saload"); | |
0 | 843 return; |
844 } | |
845 current_frame.push_stack( | |
846 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
847 no_control_flow = false; break; | |
848 case Bytecodes::_laload : | |
849 type = current_frame.pop_stack( | |
850 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
851 atype = current_frame.pop_stack( | |
852 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
853 if (!atype.is_long_array()) { | |
6605 | 854 verify_error(ErrorContext::bad_type(bci, |
855 current_frame.stack_top_ctx(), ref_ctx("[J", THREAD)), | |
856 bad_type_msg, "laload"); | |
0 | 857 return; |
858 } | |
859 current_frame.push_stack_2( | |
860 VerificationType::long_type(), | |
861 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
862 no_control_flow = false; break; | |
863 case Bytecodes::_faload : | |
864 type = current_frame.pop_stack( | |
865 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
866 atype = current_frame.pop_stack( | |
867 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
868 if (!atype.is_float_array()) { | |
6605 | 869 verify_error(ErrorContext::bad_type(bci, |
870 current_frame.stack_top_ctx(), ref_ctx("[F", THREAD)), | |
871 bad_type_msg, "faload"); | |
0 | 872 return; |
873 } | |
874 current_frame.push_stack( | |
875 VerificationType::float_type(), CHECK_VERIFY(this)); | |
876 no_control_flow = false; break; | |
877 case Bytecodes::_daload : | |
878 type = current_frame.pop_stack( | |
879 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
880 atype = current_frame.pop_stack( | |
881 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
882 if (!atype.is_double_array()) { | |
6605 | 883 verify_error(ErrorContext::bad_type(bci, |
884 current_frame.stack_top_ctx(), ref_ctx("[D", THREAD)), | |
885 bad_type_msg, "daload"); | |
0 | 886 return; |
887 } | |
888 current_frame.push_stack_2( | |
889 VerificationType::double_type(), | |
890 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
891 no_control_flow = false; break; | |
892 case Bytecodes::_aaload : { | |
893 type = current_frame.pop_stack( | |
894 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
895 atype = current_frame.pop_stack( | |
896 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
897 if (!atype.is_reference_array()) { | |
6605 | 898 verify_error(ErrorContext::bad_type(bci, |
899 current_frame.stack_top_ctx(), | |
900 TypeOrigin::implicit(VerificationType::reference_check())), | |
901 bad_type_msg, "aaload"); | |
0 | 902 return; |
903 } | |
904 if (atype.is_null()) { | |
905 current_frame.push_stack( | |
906 VerificationType::null_type(), CHECK_VERIFY(this)); | |
907 } else { | |
908 VerificationType component = | |
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909 atype.get_component(this, CHECK_VERIFY(this)); |
0 | 910 current_frame.push_stack(component, CHECK_VERIFY(this)); |
911 } | |
912 no_control_flow = false; break; | |
913 } | |
914 case Bytecodes::_istore : | |
915 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
916 no_control_flow = false; break; | |
917 case Bytecodes::_istore_0 : | |
918 case Bytecodes::_istore_1 : | |
919 case Bytecodes::_istore_2 : | |
920 case Bytecodes::_istore_3 : | |
921 index = opcode - Bytecodes::_istore_0; | |
922 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
923 no_control_flow = false; break; | |
924 case Bytecodes::_lstore : | |
925 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
926 no_control_flow = false; break; | |
927 case Bytecodes::_lstore_0 : | |
928 case Bytecodes::_lstore_1 : | |
929 case Bytecodes::_lstore_2 : | |
930 case Bytecodes::_lstore_3 : | |
931 index = opcode - Bytecodes::_lstore_0; | |
932 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
933 no_control_flow = false; break; | |
934 case Bytecodes::_fstore : | |
935 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
936 no_control_flow = false; break; | |
937 case Bytecodes::_fstore_0 : | |
938 case Bytecodes::_fstore_1 : | |
939 case Bytecodes::_fstore_2 : | |
940 case Bytecodes::_fstore_3 : | |
941 index = opcode - Bytecodes::_fstore_0; | |
942 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
943 no_control_flow = false; break; | |
944 case Bytecodes::_dstore : | |
945 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
946 no_control_flow = false; break; | |
947 case Bytecodes::_dstore_0 : | |
948 case Bytecodes::_dstore_1 : | |
949 case Bytecodes::_dstore_2 : | |
950 case Bytecodes::_dstore_3 : | |
951 index = opcode - Bytecodes::_dstore_0; | |
952 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
953 no_control_flow = false; break; | |
954 case Bytecodes::_astore : | |
955 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
956 no_control_flow = false; break; | |
957 case Bytecodes::_astore_0 : | |
958 case Bytecodes::_astore_1 : | |
959 case Bytecodes::_astore_2 : | |
960 case Bytecodes::_astore_3 : | |
961 index = opcode - Bytecodes::_astore_0; | |
962 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
963 no_control_flow = false; break; | |
964 case Bytecodes::_iastore : | |
965 type = current_frame.pop_stack( | |
966 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
967 type2 = current_frame.pop_stack( | |
968 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
969 atype = current_frame.pop_stack( | |
970 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
971 if (!atype.is_int_array()) { | |
6605 | 972 verify_error(ErrorContext::bad_type(bci, |
973 current_frame.stack_top_ctx(), ref_ctx("[I", THREAD)), | |
974 bad_type_msg, "iastore"); | |
0 | 975 return; |
976 } | |
977 no_control_flow = false; break; | |
978 case Bytecodes::_bastore : | |
979 type = current_frame.pop_stack( | |
980 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
981 type2 = current_frame.pop_stack( | |
982 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
983 atype = current_frame.pop_stack( | |
984 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
985 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
6605 | 986 verify_error( |
987 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
988 bad_type_msg, "bastore"); | |
0 | 989 return; |
990 } | |
991 no_control_flow = false; break; | |
992 case Bytecodes::_castore : | |
993 current_frame.pop_stack( | |
994 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
995 current_frame.pop_stack( | |
996 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
997 atype = current_frame.pop_stack( | |
998 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
999 if (!atype.is_char_array()) { | |
6605 | 1000 verify_error(ErrorContext::bad_type(bci, |
1001 current_frame.stack_top_ctx(), ref_ctx("[C", THREAD)), | |
1002 bad_type_msg, "castore"); | |
0 | 1003 return; |
1004 } | |
1005 no_control_flow = false; break; | |
1006 case Bytecodes::_sastore : | |
1007 current_frame.pop_stack( | |
1008 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1009 current_frame.pop_stack( | |
1010 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1011 atype = current_frame.pop_stack( | |
1012 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1013 if (!atype.is_short_array()) { | |
6605 | 1014 verify_error(ErrorContext::bad_type(bci, |
1015 current_frame.stack_top_ctx(), ref_ctx("[S", THREAD)), | |
1016 bad_type_msg, "sastore"); | |
0 | 1017 return; |
1018 } | |
1019 no_control_flow = false; break; | |
1020 case Bytecodes::_lastore : | |
1021 current_frame.pop_stack_2( | |
1022 VerificationType::long2_type(), | |
1023 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1024 current_frame.pop_stack( | |
1025 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1026 atype = current_frame.pop_stack( | |
1027 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1028 if (!atype.is_long_array()) { | |
6605 | 1029 verify_error(ErrorContext::bad_type(bci, |
1030 current_frame.stack_top_ctx(), ref_ctx("[J", THREAD)), | |
1031 bad_type_msg, "lastore"); | |
0 | 1032 return; |
1033 } | |
1034 no_control_flow = false; break; | |
1035 case Bytecodes::_fastore : | |
1036 current_frame.pop_stack( | |
1037 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1038 current_frame.pop_stack | |
1039 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1040 atype = current_frame.pop_stack( | |
1041 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1042 if (!atype.is_float_array()) { | |
6605 | 1043 verify_error(ErrorContext::bad_type(bci, |
1044 current_frame.stack_top_ctx(), ref_ctx("[F", THREAD)), | |
1045 bad_type_msg, "fastore"); | |
0 | 1046 return; |
1047 } | |
1048 no_control_flow = false; break; | |
1049 case Bytecodes::_dastore : | |
1050 current_frame.pop_stack_2( | |
1051 VerificationType::double2_type(), | |
1052 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1053 current_frame.pop_stack( | |
1054 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1055 atype = current_frame.pop_stack( | |
1056 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1057 if (!atype.is_double_array()) { | |
6605 | 1058 verify_error(ErrorContext::bad_type(bci, |
1059 current_frame.stack_top_ctx(), ref_ctx("[D", THREAD)), | |
1060 bad_type_msg, "dastore"); | |
0 | 1061 return; |
1062 } | |
1063 no_control_flow = false; break; | |
1064 case Bytecodes::_aastore : | |
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|
1065 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1066 type2 = current_frame.pop_stack( |
1067 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1068 atype = current_frame.pop_stack( | |
1069 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1070 // more type-checking is done at runtime | |
1071 if (!atype.is_reference_array()) { | |
6605 | 1072 verify_error(ErrorContext::bad_type(bci, |
1073 current_frame.stack_top_ctx(), | |
1074 TypeOrigin::implicit(VerificationType::reference_check())), | |
1075 bad_type_msg, "aastore"); | |
0 | 1076 return; |
1077 } | |
1078 // 4938384: relaxed constraint in JVMS 3nd edition. | |
1079 no_control_flow = false; break; | |
1080 case Bytecodes::_pop : | |
1081 current_frame.pop_stack( | |
1082 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1083 no_control_flow = false; break; | |
1084 case Bytecodes::_pop2 : | |
1085 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1086 if (type.is_category1()) { | |
1087 current_frame.pop_stack( | |
1088 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1089 } else if (type.is_category2_2nd()) { | |
1090 current_frame.pop_stack( | |
1091 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1092 } else { | |
6605 | 1093 /* Unreachable? Would need a category2_1st on TOS |
1094 * which does not appear possible. */ | |
1095 verify_error( | |
1096 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1097 bad_type_msg, "pop2"); | |
0 | 1098 return; |
1099 } | |
1100 no_control_flow = false; break; | |
1101 case Bytecodes::_dup : | |
1102 type = current_frame.pop_stack( | |
1103 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1104 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1105 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1106 no_control_flow = false; break; | |
1107 case Bytecodes::_dup_x1 : | |
1108 type = current_frame.pop_stack( | |
1109 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1110 type2 = current_frame.pop_stack( | |
1111 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1112 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1113 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1114 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1115 no_control_flow = false; break; | |
1116 case Bytecodes::_dup_x2 : | |
1117 { | |
1118 VerificationType type3; | |
1119 type = current_frame.pop_stack( | |
1120 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1121 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1122 if (type2.is_category1()) { | |
1123 type3 = current_frame.pop_stack( | |
1124 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1125 } else if (type2.is_category2_2nd()) { | |
1126 type3 = current_frame.pop_stack( | |
1127 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1128 } else { | |
6605 | 1129 /* Unreachable? Would need a category2_1st at stack depth 2 with |
1130 * a category1 on TOS which does not appear possible. */ | |
1131 verify_error(ErrorContext::bad_type( | |
1132 bci, current_frame.stack_top_ctx()), bad_type_msg, "dup_x2"); | |
0 | 1133 return; |
1134 } | |
1135 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1136 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1137 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1138 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1139 no_control_flow = false; break; | |
1140 } | |
1141 case Bytecodes::_dup2 : | |
1142 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1143 if (type.is_category1()) { | |
1144 type2 = current_frame.pop_stack( | |
1145 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1146 } else if (type.is_category2_2nd()) { | |
1147 type2 = current_frame.pop_stack( | |
1148 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1149 } else { | |
6605 | 1150 /* Unreachable? Would need a category2_1st on TOS which does not |
1151 * appear possible. */ | |
1152 verify_error( | |
1153 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1154 bad_type_msg, "dup2"); | |
0 | 1155 return; |
1156 } | |
1157 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1158 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1159 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1160 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1161 no_control_flow = false; break; | |
1162 case Bytecodes::_dup2_x1 : | |
1163 { | |
1164 VerificationType type3; | |
1165 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1166 if (type.is_category1()) { | |
1167 type2 = current_frame.pop_stack( | |
1168 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
6605 | 1169 } else if (type.is_category2_2nd()) { |
1170 type2 = current_frame.pop_stack( | |
1171 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
0 | 1172 } else { |
6605 | 1173 /* Unreachable? Would need a category2_1st on TOS which does |
1174 * not appear possible. */ | |
1175 verify_error( | |
1176 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1177 bad_type_msg, "dup2_x1"); | |
0 | 1178 return; |
1179 } | |
1180 type3 = current_frame.pop_stack( | |
1181 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1182 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1183 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1184 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1185 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1186 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1187 no_control_flow = false; break; | |
1188 } | |
1189 case Bytecodes::_dup2_x2 : | |
1190 { | |
1191 VerificationType type3, type4; | |
1192 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1193 if (type.is_category1()) { | |
1194 type2 = current_frame.pop_stack( | |
1195 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1196 } else if (type.is_category2_2nd()) { | |
1197 type2 = current_frame.pop_stack( | |
1198 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1199 } else { | |
6605 | 1200 /* Unreachable? Would need a category2_1st on TOS which does |
1201 * not appear possible. */ | |
1202 verify_error( | |
1203 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1204 bad_type_msg, "dup2_x2"); | |
0 | 1205 return; |
1206 } | |
1207 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1208 if (type3.is_category1()) { | |
1209 type4 = current_frame.pop_stack( | |
1210 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1211 } else if (type3.is_category2_2nd()) { | |
1212 type4 = current_frame.pop_stack( | |
1213 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1214 } else { | |
6605 | 1215 /* Unreachable? Would need a category2_1st on TOS after popping |
1216 * a long/double or two category 1's, which does not | |
1217 * appear possible. */ | |
1218 verify_error( | |
1219 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1220 bad_type_msg, "dup2_x2"); | |
0 | 1221 return; |
1222 } | |
1223 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1224 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1225 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
1226 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1227 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1228 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1229 no_control_flow = false; break; | |
1230 } | |
1231 case Bytecodes::_swap : | |
1232 type = current_frame.pop_stack( | |
1233 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1234 type2 = current_frame.pop_stack( | |
1235 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1236 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1237 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1238 no_control_flow = false; break; | |
1239 case Bytecodes::_iadd : | |
1240 case Bytecodes::_isub : | |
1241 case Bytecodes::_imul : | |
1242 case Bytecodes::_idiv : | |
1243 case Bytecodes::_irem : | |
1244 case Bytecodes::_ishl : | |
1245 case Bytecodes::_ishr : | |
1246 case Bytecodes::_iushr : | |
1247 case Bytecodes::_ior : | |
1248 case Bytecodes::_ixor : | |
1249 case Bytecodes::_iand : | |
1250 current_frame.pop_stack( | |
1251 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1252 // fall through | |
1253 case Bytecodes::_ineg : | |
1254 current_frame.pop_stack( | |
1255 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1256 current_frame.push_stack( | |
1257 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1258 no_control_flow = false; break; | |
1259 case Bytecodes::_ladd : | |
1260 case Bytecodes::_lsub : | |
1261 case Bytecodes::_lmul : | |
1262 case Bytecodes::_ldiv : | |
1263 case Bytecodes::_lrem : | |
1264 case Bytecodes::_land : | |
1265 case Bytecodes::_lor : | |
1266 case Bytecodes::_lxor : | |
1267 current_frame.pop_stack_2( | |
1268 VerificationType::long2_type(), | |
1269 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1270 // fall through | |
1271 case Bytecodes::_lneg : | |
1272 current_frame.pop_stack_2( | |
1273 VerificationType::long2_type(), | |
1274 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1275 current_frame.push_stack_2( | |
1276 VerificationType::long_type(), | |
1277 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1278 no_control_flow = false; break; | |
1279 case Bytecodes::_lshl : | |
1280 case Bytecodes::_lshr : | |
1281 case Bytecodes::_lushr : | |
1282 current_frame.pop_stack( | |
1283 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1284 current_frame.pop_stack_2( | |
1285 VerificationType::long2_type(), | |
1286 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1287 current_frame.push_stack_2( | |
1288 VerificationType::long_type(), | |
1289 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1290 no_control_flow = false; break; | |
1291 case Bytecodes::_fadd : | |
1292 case Bytecodes::_fsub : | |
1293 case Bytecodes::_fmul : | |
1294 case Bytecodes::_fdiv : | |
1295 case Bytecodes::_frem : | |
1296 current_frame.pop_stack( | |
1297 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1298 // fall through | |
1299 case Bytecodes::_fneg : | |
1300 current_frame.pop_stack( | |
1301 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1302 current_frame.push_stack( | |
1303 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1304 no_control_flow = false; break; | |
1305 case Bytecodes::_dadd : | |
1306 case Bytecodes::_dsub : | |
1307 case Bytecodes::_dmul : | |
1308 case Bytecodes::_ddiv : | |
1309 case Bytecodes::_drem : | |
1310 current_frame.pop_stack_2( | |
1311 VerificationType::double2_type(), | |
1312 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1313 // fall through | |
1314 case Bytecodes::_dneg : | |
1315 current_frame.pop_stack_2( | |
1316 VerificationType::double2_type(), | |
1317 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1318 current_frame.push_stack_2( | |
1319 VerificationType::double_type(), | |
1320 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1321 no_control_flow = false; break; | |
1322 case Bytecodes::_iinc : | |
1323 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
1324 no_control_flow = false; break; | |
1325 case Bytecodes::_i2l : | |
1326 type = current_frame.pop_stack( | |
1327 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1328 current_frame.push_stack_2( | |
1329 VerificationType::long_type(), | |
1330 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1331 no_control_flow = false; break; | |
1332 case Bytecodes::_l2i : | |
1333 current_frame.pop_stack_2( | |
1334 VerificationType::long2_type(), | |
1335 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1336 current_frame.push_stack( | |
1337 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1338 no_control_flow = false; break; | |
1339 case Bytecodes::_i2f : | |
1340 current_frame.pop_stack( | |
1341 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1342 current_frame.push_stack( | |
1343 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1344 no_control_flow = false; break; | |
1345 case Bytecodes::_i2d : | |
1346 current_frame.pop_stack( | |
1347 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1348 current_frame.push_stack_2( | |
1349 VerificationType::double_type(), | |
1350 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1351 no_control_flow = false; break; | |
1352 case Bytecodes::_l2f : | |
1353 current_frame.pop_stack_2( | |
1354 VerificationType::long2_type(), | |
1355 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1356 current_frame.push_stack( | |
1357 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1358 no_control_flow = false; break; | |
1359 case Bytecodes::_l2d : | |
1360 current_frame.pop_stack_2( | |
1361 VerificationType::long2_type(), | |
1362 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1363 current_frame.push_stack_2( | |
1364 VerificationType::double_type(), | |
1365 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1366 no_control_flow = false; break; | |
1367 case Bytecodes::_f2i : | |
1368 current_frame.pop_stack( | |
1369 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1370 current_frame.push_stack( | |
1371 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1372 no_control_flow = false; break; | |
1373 case Bytecodes::_f2l : | |
1374 current_frame.pop_stack( | |
1375 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1376 current_frame.push_stack_2( | |
1377 VerificationType::long_type(), | |
1378 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1379 no_control_flow = false; break; | |
1380 case Bytecodes::_f2d : | |
1381 current_frame.pop_stack( | |
1382 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1383 current_frame.push_stack_2( | |
1384 VerificationType::double_type(), | |
1385 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1386 no_control_flow = false; break; | |
1387 case Bytecodes::_d2i : | |
1388 current_frame.pop_stack_2( | |
1389 VerificationType::double2_type(), | |
1390 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1391 current_frame.push_stack( | |
1392 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1393 no_control_flow = false; break; | |
1394 case Bytecodes::_d2l : | |
1395 current_frame.pop_stack_2( | |
1396 VerificationType::double2_type(), | |
1397 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1398 current_frame.push_stack_2( | |
1399 VerificationType::long_type(), | |
1400 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1401 no_control_flow = false; break; | |
1402 case Bytecodes::_d2f : | |
1403 current_frame.pop_stack_2( | |
1404 VerificationType::double2_type(), | |
1405 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1406 current_frame.push_stack( | |
1407 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1408 no_control_flow = false; break; | |
1409 case Bytecodes::_i2b : | |
1410 case Bytecodes::_i2c : | |
1411 case Bytecodes::_i2s : | |
1412 current_frame.pop_stack( | |
1413 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1414 current_frame.push_stack( | |
1415 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1416 no_control_flow = false; break; | |
1417 case Bytecodes::_lcmp : | |
1418 current_frame.pop_stack_2( | |
1419 VerificationType::long2_type(), | |
1420 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1421 current_frame.pop_stack_2( | |
1422 VerificationType::long2_type(), | |
1423 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1424 current_frame.push_stack( | |
1425 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1426 no_control_flow = false; break; | |
1427 case Bytecodes::_fcmpl : | |
1428 case Bytecodes::_fcmpg : | |
1429 current_frame.pop_stack( | |
1430 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1431 current_frame.pop_stack( | |
1432 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1433 current_frame.push_stack( | |
1434 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1435 no_control_flow = false; break; | |
1436 case Bytecodes::_dcmpl : | |
1437 case Bytecodes::_dcmpg : | |
1438 current_frame.pop_stack_2( | |
1439 VerificationType::double2_type(), | |
1440 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1441 current_frame.pop_stack_2( | |
1442 VerificationType::double2_type(), | |
1443 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1444 current_frame.push_stack( | |
1445 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1446 no_control_flow = false; break; | |
1447 case Bytecodes::_if_icmpeq: | |
1448 case Bytecodes::_if_icmpne: | |
1449 case Bytecodes::_if_icmplt: | |
1450 case Bytecodes::_if_icmpge: | |
1451 case Bytecodes::_if_icmpgt: | |
1452 case Bytecodes::_if_icmple: | |
1453 current_frame.pop_stack( | |
1454 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1455 // fall through | |
1456 case Bytecodes::_ifeq: | |
1457 case Bytecodes::_ifne: | |
1458 case Bytecodes::_iflt: | |
1459 case Bytecodes::_ifge: | |
1460 case Bytecodes::_ifgt: | |
1461 case Bytecodes::_ifle: | |
1462 current_frame.pop_stack( | |
1463 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1464 target = bcs.dest(); | |
1465 stackmap_table.check_jump_target( | |
1466 ¤t_frame, target, CHECK_VERIFY(this)); | |
1467 no_control_flow = false; break; | |
1468 case Bytecodes::_if_acmpeq : | |
1469 case Bytecodes::_if_acmpne : | |
1470 current_frame.pop_stack( | |
1471 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1472 // fall through | |
1473 case Bytecodes::_ifnull : | |
1474 case Bytecodes::_ifnonnull : | |
1475 current_frame.pop_stack( | |
1476 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1477 target = bcs.dest(); | |
1478 stackmap_table.check_jump_target | |
1479 (¤t_frame, target, CHECK_VERIFY(this)); | |
1480 no_control_flow = false; break; | |
1481 case Bytecodes::_goto : | |
1482 target = bcs.dest(); | |
1483 stackmap_table.check_jump_target( | |
1484 ¤t_frame, target, CHECK_VERIFY(this)); | |
1485 no_control_flow = true; break; | |
1486 case Bytecodes::_goto_w : | |
1487 target = bcs.dest_w(); | |
1488 stackmap_table.check_jump_target( | |
1489 ¤t_frame, target, CHECK_VERIFY(this)); | |
1490 no_control_flow = true; break; | |
1491 case Bytecodes::_tableswitch : | |
1492 case Bytecodes::_lookupswitch : | |
1493 verify_switch( | |
1494 &bcs, code_length, code_data, ¤t_frame, | |
1495 &stackmap_table, CHECK_VERIFY(this)); | |
1496 no_control_flow = true; break; | |
1497 case Bytecodes::_ireturn : | |
1498 type = current_frame.pop_stack( | |
1499 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
6605 | 1500 verify_return_value(return_type, type, bci, |
1501 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1502 no_control_flow = true; break; |
1503 case Bytecodes::_lreturn : | |
1504 type2 = current_frame.pop_stack( | |
1505 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1506 type = current_frame.pop_stack( | |
1507 VerificationType::long_type(), CHECK_VERIFY(this)); | |
6605 | 1508 verify_return_value(return_type, type, bci, |
1509 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1510 no_control_flow = true; break; |
1511 case Bytecodes::_freturn : | |
1512 type = current_frame.pop_stack( | |
1513 VerificationType::float_type(), CHECK_VERIFY(this)); | |
6605 | 1514 verify_return_value(return_type, type, bci, |
1515 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1516 no_control_flow = true; break; |
1517 case Bytecodes::_dreturn : | |
1518 type2 = current_frame.pop_stack( | |
1519 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1520 type = current_frame.pop_stack( | |
1521 VerificationType::double_type(), CHECK_VERIFY(this)); | |
6605 | 1522 verify_return_value(return_type, type, bci, |
1523 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1524 no_control_flow = true; break; |
1525 case Bytecodes::_areturn : | |
1526 type = current_frame.pop_stack( | |
1527 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
6605 | 1528 verify_return_value(return_type, type, bci, |
1529 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1530 no_control_flow = true; break; |
1531 case Bytecodes::_return : | |
1532 if (return_type != VerificationType::bogus_type()) { | |
6605 | 1533 verify_error(ErrorContext::bad_code(bci), |
1534 "Method expects a return value"); | |
0 | 1535 return; |
1536 } | |
1537 // Make sure "this" has been initialized if current method is an | |
1538 // <init> | |
1539 if (_method->name() == vmSymbols::object_initializer_name() && | |
1540 current_frame.flag_this_uninit()) { | |
6605 | 1541 verify_error(ErrorContext::bad_code(bci), |
1542 "Constructor must call super() or this() " | |
1543 "before return"); | |
0 | 1544 return; |
1545 } | |
1546 no_control_flow = true; break; | |
1547 case Bytecodes::_getstatic : | |
1548 case Bytecodes::_putstatic : | |
1549 case Bytecodes::_getfield : | |
1550 case Bytecodes::_putfield : | |
1551 verify_field_instructions( | |
1552 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1553 no_control_flow = false; break; | |
1554 case Bytecodes::_invokevirtual : | |
1555 case Bytecodes::_invokespecial : | |
1556 case Bytecodes::_invokestatic : | |
1557 verify_invoke_instructions( | |
1558 &bcs, code_length, ¤t_frame, | |
1559 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1560 no_control_flow = false; break; | |
1561 case Bytecodes::_invokeinterface : | |
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1562 case Bytecodes::_invokedynamic : |
0 | 1563 verify_invoke_instructions( |
1564 &bcs, code_length, ¤t_frame, | |
1565 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1566 no_control_flow = false; break; | |
1567 case Bytecodes::_new : | |
1568 { | |
1565 | 1569 index = bcs.get_index_u2(); |
6605 | 1570 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
0 | 1571 VerificationType new_class_type = |
1572 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1573 if (!new_class_type.is_object()) { | |
6605 | 1574 verify_error(ErrorContext::bad_type(bci, |
1575 TypeOrigin::cp(index, new_class_type)), | |
1576 "Illegal new instruction"); | |
0 | 1577 return; |
1578 } | |
1579 type = VerificationType::uninitialized_type(bci); | |
1580 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1581 no_control_flow = false; break; | |
1582 } | |
1583 case Bytecodes::_newarray : | |
1584 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1585 current_frame.pop_stack( | |
1586 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1587 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1588 no_control_flow = false; break; | |
1589 case Bytecodes::_anewarray : | |
1590 verify_anewarray( | |
6605 | 1591 bci, bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1592 no_control_flow = false; break; |
1593 case Bytecodes::_arraylength : | |
1594 type = current_frame.pop_stack( | |
1595 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1596 if (!(type.is_null() || type.is_array())) { |
6605 | 1597 verify_error(ErrorContext::bad_type( |
1598 bci, current_frame.stack_top_ctx()), | |
1599 bad_type_msg, "arraylength"); | |
0 | 1600 } |
1601 current_frame.push_stack( | |
1602 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1603 no_control_flow = false; break; | |
1604 case Bytecodes::_checkcast : | |
1605 { | |
1565 | 1606 index = bcs.get_index_u2(); |
6605 | 1607 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
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1608 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1609 VerificationType klass_type = cp_index_to_type( |
1610 index, cp, CHECK_VERIFY(this)); | |
1611 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1612 no_control_flow = false; break; | |
1613 } | |
1614 case Bytecodes::_instanceof : { | |
1565 | 1615 index = bcs.get_index_u2(); |
6605 | 1616 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
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1617 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1618 current_frame.push_stack( |
1619 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1620 no_control_flow = false; break; | |
1621 } | |
1622 case Bytecodes::_monitorenter : | |
1623 case Bytecodes::_monitorexit : | |
1624 current_frame.pop_stack( | |
1625 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1626 no_control_flow = false; break; | |
1627 case Bytecodes::_multianewarray : | |
1628 { | |
1565 | 1629 index = bcs.get_index_u2(); |
0 | 1630 u2 dim = *(bcs.bcp()+3); |
6605 | 1631 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
0 | 1632 VerificationType new_array_type = |
1633 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1634 if (!new_array_type.is_array()) { | |
6605 | 1635 verify_error(ErrorContext::bad_type(bci, |
1636 TypeOrigin::cp(index, new_array_type)), | |
1637 "Illegal constant pool index in multianewarray instruction"); | |
0 | 1638 return; |
1639 } | |
1640 if (dim < 1 || new_array_type.dimensions() < dim) { | |
6605 | 1641 verify_error(ErrorContext::bad_code(bci), |
1642 "Illegal dimension in multianewarray instruction: %d", dim); | |
0 | 1643 return; |
1644 } | |
1645 for (int i = 0; i < dim; i++) { | |
1646 current_frame.pop_stack( | |
1647 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1648 } | |
1649 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1650 no_control_flow = false; break; | |
1651 } | |
1652 case Bytecodes::_athrow : | |
1653 type = VerificationType::reference_type( | |
1654 vmSymbols::java_lang_Throwable()); | |
1655 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1656 no_control_flow = true; break; | |
1657 default: | |
1658 // We only need to check the valid bytecodes in class file. | |
1659 // And jsr and ret are not in the new class file format in JDK1.5. | |
6605 | 1660 verify_error(ErrorContext::bad_code(bci), |
1661 "Bad instruction: %02x", opcode); | |
0 | 1662 no_control_flow = false; |
1663 return; | |
1664 } // end switch | |
1665 } // end Merge with the next instruction | |
1666 | |
1667 // Look for possible jump target in exception handlers and see if it | |
1668 // matches current_frame | |
1669 if (bci >= ex_min && bci < ex_max) { | |
1670 verify_exception_handler_targets( | |
1671 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1672 } | |
1673 } // end while | |
1674 | |
1675 // Make sure that control flow does not fall through end of the method | |
1676 if (!no_control_flow) { | |
6605 | 1677 verify_error(ErrorContext::bad_code(code_length), |
1678 "Control flow falls through code end"); | |
0 | 1679 return; |
1680 } | |
1681 } | |
1682 | |
1683 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1684 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1685 memset(code_data, 0, sizeof(char) * code_length); | |
1686 RawBytecodeStream bcs(m); | |
1687 | |
1688 while (!bcs.is_last_bytecode()) { | |
1689 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1690 int bci = bcs.bci(); | |
1565 | 1691 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1692 code_data[bci] = NEW_OFFSET; |
1693 } else { | |
1694 code_data[bci] = BYTECODE_OFFSET; | |
1695 } | |
1696 } else { | |
6605 | 1697 verify_error(ErrorContext::bad_code(bcs.bci()), "Bad instruction"); |
0 | 1698 return NULL; |
1699 } | |
1700 } | |
1701 | |
1702 return code_data; | |
1703 } | |
1704 | |
1705 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
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1706 ExceptionTable exhandlers(_method()); |
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1707 int exlength = exhandlers.length(); |
0 | 1708 constantPoolHandle cp (THREAD, _method->constants()); |
1709 | |
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1710 for(int i = 0; i < exlength; i++) { |
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1711 //reacquire the table in case a GC happened |
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1712 ExceptionTable exhandlers(_method()); |
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1713 u2 start_pc = exhandlers.start_pc(i); |
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1714 u2 end_pc = exhandlers.end_pc(i); |
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1715 u2 handler_pc = exhandlers.handler_pc(i); |
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1716 if (start_pc >= code_length || code_data[start_pc] == 0) { |
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1717 class_format_error("Illegal exception table start_pc %d", start_pc); |
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1718 return; |
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|
1719 } |
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1720 if (end_pc != code_length) { // special case: end_pc == code_length |
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1721 if (end_pc > code_length || code_data[end_pc] == 0) { |
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|
1722 class_format_error("Illegal exception table end_pc %d", end_pc); |
0 | 1723 return; |
1724 } | |
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|
1725 } |
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1726 if (handler_pc >= code_length || code_data[handler_pc] == 0) { |
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1727 class_format_error("Illegal exception table handler_pc %d", handler_pc); |
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|
1728 return; |
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|
1729 } |
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|
1730 int catch_type_index = exhandlers.catch_type_index(i); |
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1731 if (catch_type_index != 0) { |
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1732 VerificationType catch_type = cp_index_to_type( |
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1733 catch_type_index, cp, CHECK_VERIFY(this)); |
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1734 VerificationType throwable = |
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1735 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
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1736 bool is_subclass = throwable.is_assignable_from( |
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1737 catch_type, this, CHECK_VERIFY(this)); |
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1738 if (!is_subclass) { |
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1739 // 4286534: should throw VerifyError according to recent spec change |
6605 | 1740 verify_error(ErrorContext::bad_type(handler_pc, |
1741 TypeOrigin::cp(catch_type_index, catch_type), | |
1742 TypeOrigin::implicit(throwable)), | |
1743 "Catch type is not a subclass " | |
1744 "of Throwable in exception handler %d", handler_pc); | |
0 | 1745 return; |
1746 } | |
1747 } | |
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1748 if (start_pc < min) min = start_pc; |
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1749 if (end_pc > max) max = end_pc; |
0 | 1750 } |
1751 } | |
1752 | |
1753 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1754 int localvariable_table_length = _method()->localvariable_table_length(); | |
1755 if (localvariable_table_length > 0) { | |
1756 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1757 for (int i = 0; i < localvariable_table_length; i++) { | |
1758 u2 start_bci = table[i].start_bci; | |
1759 u2 length = table[i].length; | |
1760 | |
1761 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1762 class_format_error( | |
1763 "Illegal local variable table start_pc %d", start_bci); | |
1764 return; | |
1765 } | |
1766 u4 end_bci = (u4)(start_bci + length); | |
1767 if (end_bci != code_length) { | |
1768 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1769 class_format_error( "Illegal local variable table length %d", length); | |
1770 return; | |
1771 } | |
1772 } | |
1773 } | |
1774 } | |
1775 } | |
1776 | |
1777 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1778 StackMapFrame* current_frame, | |
1779 StackMapTable* stackmap_table, | |
1780 bool no_control_flow, TRAPS) { | |
1781 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1782 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1783 if (no_control_flow && this_offset > bci) { | |
6605 | 1784 verify_error(ErrorContext::missing_stackmap(bci), |
1785 "Expecting a stack map frame"); | |
0 | 1786 return 0; |
1787 } | |
1788 if (this_offset == bci) { | |
6605 | 1789 ErrorContext ctx; |
0 | 1790 // See if current stack map can be assigned to the frame in table. |
1791 // current_frame is the stackmap frame got from the last instruction. | |
1792 // If matched, current_frame will be updated by this method. | |
6605 | 1793 bool matches = stackmap_table->match_stackmap( |
0 | 1794 current_frame, this_offset, stackmap_index, |
6605 | 1795 !no_control_flow, true, &ctx, CHECK_VERIFY_(this, 0)); |
1796 if (!matches) { | |
0 | 1797 // report type error |
6605 | 1798 verify_error(ctx, "Instruction type does not match stack map"); |
0 | 1799 return 0; |
1800 } | |
1801 stackmap_index++; | |
1802 } else if (this_offset < bci) { | |
1803 // current_offset should have met this_offset. | |
1804 class_format_error("Bad stack map offset %d", this_offset); | |
1805 return 0; | |
1806 } | |
1807 } else if (no_control_flow) { | |
6605 | 1808 verify_error(ErrorContext::bad_code(bci), "Expecting a stack map frame"); |
0 | 1809 return 0; |
1810 } | |
1811 return stackmap_index; | |
1812 } | |
1813 | |
1814 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1815 StackMapTable* stackmap_table, TRAPS) { | |
1816 constantPoolHandle cp (THREAD, _method->constants()); | |
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1817 ExceptionTable exhandlers(_method()); |
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1818 int exlength = exhandlers.length(); |
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1819 for(int i = 0; i < exlength; i++) { |
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1820 //reacquire the table in case a GC happened |
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1821 ExceptionTable exhandlers(_method()); |
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1822 u2 start_pc = exhandlers.start_pc(i); |
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1823 u2 end_pc = exhandlers.end_pc(i); |
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1824 u2 handler_pc = exhandlers.handler_pc(i); |
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1825 int catch_type_index = exhandlers.catch_type_index(i); |
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1826 if(bci >= start_pc && bci < end_pc) { |
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1827 u1 flags = current_frame->flags(); |
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1828 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } |
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1829 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); |
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1830 if (catch_type_index != 0) { |
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1831 // We know that this index refers to a subclass of Throwable |
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1832 VerificationType catch_type = cp_index_to_type( |
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1833 catch_type_index, cp, CHECK_VERIFY(this)); |
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1834 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); |
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1835 } else { |
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1836 VerificationType throwable = |
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1837 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
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1838 new_frame->push_stack(throwable, CHECK_VERIFY(this)); |
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1839 } |
6605 | 1840 ErrorContext ctx; |
1841 bool matches = stackmap_table->match_stackmap( | |
1842 new_frame, handler_pc, true, false, &ctx, CHECK_VERIFY(this)); | |
1843 if (!matches) { | |
1844 verify_error(ctx, "Stack map does not match the one at " | |
1845 "exception handler %d", handler_pc); | |
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1846 return; |
0 | 1847 } |
1848 } | |
1849 } | |
1850 } | |
1851 | |
6605 | 1852 void ClassVerifier::verify_cp_index( |
1853 u2 bci, constantPoolHandle cp, int index, TRAPS) { | |
0 | 1854 int nconstants = cp->length(); |
1855 if ((index <= 0) || (index >= nconstants)) { | |
6605 | 1856 verify_error(ErrorContext::bad_cp_index(bci, index), |
1857 "Illegal constant pool index %d in class %s", | |
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1858 index, cp->pool_holder()->external_name()); |
0 | 1859 return; |
1860 } | |
1861 } | |
1862 | |
1863 void ClassVerifier::verify_cp_type( | |
6605 | 1864 u2 bci, int index, constantPoolHandle cp, unsigned int types, TRAPS) { |
0 | 1865 |
1866 // In some situations, bytecode rewriting may occur while we're verifying. | |
1867 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1868 // instead. Be sure we don't pick up such indices by accident. |
1869 // We must check was_recursively_verified() before we get here. | |
1870 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1871 |
6605 | 1872 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); |
0 | 1873 unsigned int tag = cp->tag_at(index).value(); |
1874 if ((types & (1 << tag)) == 0) { | |
6605 | 1875 verify_error(ErrorContext::bad_cp_index(bci, index), |
0 | 1876 "Illegal type at constant pool entry %d in class %s", |
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1877 index, cp->pool_holder()->external_name()); |
0 | 1878 return; |
1879 } | |
1880 } | |
1881 | |
1882 void ClassVerifier::verify_cp_class_type( | |
6605 | 1883 u2 bci, int index, constantPoolHandle cp, TRAPS) { |
1884 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); | |
0 | 1885 constantTag tag = cp->tag_at(index); |
1886 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
6605 | 1887 verify_error(ErrorContext::bad_cp_index(bci, index), |
1888 "Illegal type at constant pool entry %d in class %s", | |
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1889 index, cp->pool_holder()->external_name()); |
0 | 1890 return; |
1891 } | |
1892 } | |
1893 | |
6605 | 1894 void ClassVerifier::verify_error(ErrorContext ctx, const char* msg, ...) { |
1895 stringStream ss; | |
0 | 1896 |
6605 | 1897 ctx.reset_frames(); |
0 | 1898 _exception_type = vmSymbols::java_lang_VerifyError(); |
6605 | 1899 _error_context = ctx; |
0 | 1900 va_list va; |
6605 | 1901 va_start(va, msg); |
1902 ss.vprint(msg, va); | |
0 | 1903 va_end(va); |
6605 | 1904 _message = ss.as_string(); |
1905 #ifdef ASSERT | |
1906 ResourceMark rm; | |
1907 const char* exception_name = _exception_type->as_C_string(); | |
1908 Exceptions::debug_check_abort(exception_name, NULL); | |
1909 #endif // ndef ASSERT | |
0 | 1910 } |
1911 | |
1912 void ClassVerifier::class_format_error(const char* msg, ...) { | |
6605 | 1913 stringStream ss; |
0 | 1914 _exception_type = vmSymbols::java_lang_ClassFormatError(); |
1915 va_list va; | |
1916 va_start(va, msg); | |
6605 | 1917 ss.vprint(msg, va); |
0 | 1918 va_end(va); |
6605 | 1919 if (!_method.is_null()) { |
1920 ss.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1921 } | |
1922 _message = ss.as_string(); | |
0 | 1923 } |
1924 | |
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1925 Klass* ClassVerifier::load_class(Symbol* name, TRAPS) { |
0 | 1926 // Get current loader and protection domain first. |
1927 oop loader = current_class()->class_loader(); | |
1928 oop protection_domain = current_class()->protection_domain(); | |
1929 | |
1930 return SystemDictionary::resolve_or_fail( | |
1931 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1932 true, CHECK_NULL); | |
1933 } | |
1934 | |
1935 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
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1936 Klass* target_class, |
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1937 Symbol* field_name, |
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1938 Symbol* field_sig, |
0 | 1939 bool is_method) { |
1940 No_Safepoint_Verifier nosafepoint; | |
1941 | |
1942 // If target class isn't a super class of this class, we don't worry about this case | |
1943 if (!this_class->is_subclass_of(target_class)) { | |
1944 return false; | |
1945 } | |
1946 // Check if the specified method or field is protected | |
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1947 InstanceKlass* target_instance = InstanceKlass::cast(target_class); |
0 | 1948 fieldDescriptor fd; |
1949 if (is_method) { | |
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1950 Method* m = target_instance->uncached_lookup_method(field_name, field_sig); |
0 | 1951 if (m != NULL && m->is_protected()) { |
1952 if (!this_class->is_same_class_package(m->method_holder())) { | |
1953 return true; | |
1954 } | |
1955 } | |
1956 } else { | |
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1957 Klass* member_klass = target_instance->find_field(field_name, field_sig, &fd); |
6605 | 1958 if (member_klass != NULL && fd.is_protected()) { |
0 | 1959 if (!this_class->is_same_class_package(member_klass)) { |
1960 return true; | |
1961 } | |
1962 } | |
1963 } | |
1964 return false; | |
1965 } | |
1966 | |
1967 void ClassVerifier::verify_ldc( | |
6605 | 1968 int opcode, u2 index, StackMapFrame* current_frame, |
1969 constantPoolHandle cp, u2 bci, TRAPS) { | |
1970 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); | |
0 | 1971 constantTag tag = cp->tag_at(index); |
1972 unsigned int types; | |
1973 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
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1974 if (!tag.is_unresolved_klass()) { |
0 | 1975 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) |
1602 | 1976 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1977 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1978 // Note: The class file parser already verified the legality of | |
1979 // MethodHandle and MethodType constants. | |
6605 | 1980 verify_cp_type(bci, index, cp, types, CHECK_VERIFY(this)); |
0 | 1981 } |
1982 } else { | |
1983 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1984 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
6605 | 1985 verify_cp_type(bci, index, cp, types, CHECK_VERIFY(this)); |
0 | 1986 } |
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1987 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1988 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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1989 } else if (tag.is_string()) { |
0 | 1990 current_frame->push_stack( |
1991 VerificationType::reference_type( | |
1992 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1993 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1994 current_frame->push_stack( | |
1995 VerificationType::reference_type( | |
1996 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1997 } else if (tag.is_int()) { | |
1998 current_frame->push_stack( | |
1999 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2000 } else if (tag.is_float()) { | |
2001 current_frame->push_stack( | |
2002 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2003 } else if (tag.is_double()) { | |
2004 current_frame->push_stack_2( | |
2005 VerificationType::double_type(), | |
2006 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2007 } else if (tag.is_long()) { | |
2008 current_frame->push_stack_2( | |
2009 VerificationType::long_type(), | |
2010 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 2011 } else if (tag.is_method_handle()) { |
2012 current_frame->push_stack( | |
2013 VerificationType::reference_type( | |
2460 | 2014 vmSymbols::java_lang_invoke_MethodHandle()), CHECK_VERIFY(this)); |
1602 | 2015 } else if (tag.is_method_type()) { |
2016 current_frame->push_stack( | |
2017 VerificationType::reference_type( | |
2460 | 2018 vmSymbols::java_lang_invoke_MethodType()), CHECK_VERIFY(this)); |
0 | 2019 } else { |
6605 | 2020 /* Unreachable? verify_cp_type has already validated the cp type. */ |
2021 verify_error( | |
2022 ErrorContext::bad_cp_index(bci, index), "Invalid index in ldc"); | |
0 | 2023 return; |
2024 } | |
2025 } | |
2026 | |
2027 void ClassVerifier::verify_switch( | |
2028 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
2029 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
2030 int bci = bcs->bci(); | |
2031 address bcp = bcs->bcp(); | |
2032 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
2033 | |
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2034 if (_klass->major_version() < NONZERO_PADDING_BYTES_IN_SWITCH_MAJOR_VERSION) { |
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2035 // 4639449 & 4647081: padding bytes must be 0 |
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2036 u2 padding_offset = 1; |
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2037 while ((bcp + padding_offset) < aligned_bcp) { |
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2038 if(*(bcp + padding_offset) != 0) { |
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2039 verify_error(ErrorContext::bad_code(bci), |
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2040 "Nonzero padding byte in lookswitch or tableswitch"); |
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2041 return; |
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|
2042 } |
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|
2043 padding_offset++; |
0 | 2044 } |
2045 } | |
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2046 |
0 | 2047 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); |
2048 int keys, delta; | |
2049 current_frame->pop_stack( | |
2050 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 2051 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 2052 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
2053 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
2054 if (low > high) { | |
6605 | 2055 verify_error(ErrorContext::bad_code(bci), |
2056 "low must be less than or equal to high in tableswitch"); | |
0 | 2057 return; |
2058 } | |
2059 keys = high - low + 1; | |
2060 if (keys < 0) { | |
6605 | 2061 verify_error(ErrorContext::bad_code(bci), "too many keys in tableswitch"); |
0 | 2062 return; |
2063 } | |
2064 delta = 1; | |
2065 } else { | |
2066 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
2067 if (keys < 0) { | |
6605 | 2068 verify_error(ErrorContext::bad_code(bci), |
2069 "number of keys in lookupswitch less than 0"); | |
0 | 2070 return; |
2071 } | |
2072 delta = 2; | |
2073 // Make sure that the lookupswitch items are sorted | |
2074 for (int i = 0; i < (keys - 1); i++) { | |
2075 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
2076 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
2077 if (this_key >= next_key) { | |
6605 | 2078 verify_error(ErrorContext::bad_code(bci), |
2079 "Bad lookupswitch instruction"); | |
0 | 2080 return; |
2081 } | |
2082 } | |
2083 } | |
2084 int target = bci + default_offset; | |
2085 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
2086 for (int i = 0; i < keys; i++) { | |
6118 | 2087 // Because check_jump_target() may safepoint, the bytecode could have |
2088 // moved, which means 'aligned_bcp' is no good and needs to be recalculated. | |
2089 aligned_bcp = (address)round_to((intptr_t)(bcs->bcp() + 1), jintSize); | |
0 | 2090 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); |
2091 stackmap_table->check_jump_target( | |
2092 current_frame, target, CHECK_VERIFY(this)); | |
2093 } | |
6118 | 2094 NOT_PRODUCT(aligned_bcp = NULL); // no longer valid at this point |
0 | 2095 } |
2096 | |
2097 bool ClassVerifier::name_in_supers( | |
2177
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2098 Symbol* ref_name, instanceKlassHandle current) { |
6725
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|
2099 Klass* super = current->super(); |
0 | 2100 while (super != NULL) { |
6725
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2101 if (super->name() == ref_name) { |
0 | 2102 return true; |
2103 } | |
6725
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|
2104 super = super->super(); |
0 | 2105 } |
2106 return false; | |
2107 } | |
2108 | |
2109 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
2110 StackMapFrame* current_frame, | |
2111 constantPoolHandle cp, | |
2112 TRAPS) { | |
1565 | 2113 u2 index = bcs->get_index_u2(); |
6605 | 2114 verify_cp_type(bcs->bci(), index, cp, |
2115 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); | |
0 | 2116 |
2117 // Get field name and signature | |
2177
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2118 Symbol* field_name = cp->name_ref_at(index); |
3582bf76420e
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diff
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|
2119 Symbol* field_sig = cp->signature_ref_at(index); |
0 | 2120 |
2121 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
2122 class_format_error( | |
2123 "Invalid signature for field in class %s referenced " | |
2124 "from constant pool index %d", _klass->external_name(), index); | |
2125 return; | |
2126 } | |
2127 | |
2128 // Get referenced class type | |
2129 VerificationType ref_class_type = cp_ref_index_to_type( | |
2130 index, cp, CHECK_VERIFY(this)); | |
2131 if (!ref_class_type.is_object()) { | |
6605 | 2132 /* Unreachable? Class file parser verifies Fieldref contents */ |
2133 verify_error(ErrorContext::bad_type(bcs->bci(), | |
2134 TypeOrigin::cp(index, ref_class_type)), | |
2135 "Expecting reference to class in class %s at constant pool index %d", | |
2136 _klass->external_name(), index); | |
0 | 2137 return; |
2138 } | |
2139 VerificationType target_class_type = ref_class_type; | |
2140 | |
2141 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
2142 "buffer type must match VerificationType size"); | |
2143 uintptr_t field_type_buffer[2]; | |
2144 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
2145 // If we make a VerificationType[2] array directly, the compiler calls | |
2146 // to the c-runtime library to do the allocation instead of just | |
2147 // stack allocating it. Plus it would run constructors. This shows up | |
2148 // in performance profiles. | |
2149 | |
2150 SignatureStream sig_stream(field_sig, false); | |
2151 VerificationType stack_object_type; | |
2152 int n = change_sig_to_verificationType( | |
2153 &sig_stream, field_type, CHECK_VERIFY(this)); | |
2154 u2 bci = bcs->bci(); | |
2155 bool is_assignable; | |
1565 | 2156 switch (bcs->raw_code()) { |
0 | 2157 case Bytecodes::_getstatic: { |
2158 for (int i = 0; i < n; i++) { | |
2159 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
2160 } | |
2161 break; | |
2162 } | |
2163 case Bytecodes::_putstatic: { | |
2164 for (int i = n - 1; i >= 0; i--) { | |
2165 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
2166 } | |
2167 break; | |
2168 } | |
2169 case Bytecodes::_getfield: { | |
2170 stack_object_type = current_frame->pop_stack( | |
2171 target_class_type, CHECK_VERIFY(this)); | |
2172 for (int i = 0; i < n; i++) { | |
2173 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
2174 } | |
2175 goto check_protected; | |
2176 } | |
2177 case Bytecodes::_putfield: { | |
2178 for (int i = n - 1; i >= 0; i--) { | |
2179 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
2180 } | |
2181 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
2182 | |
2183 // The JVMS 2nd edition allows field initialization before the superclass | |
2184 // initializer, if the field is defined within the current class. | |
2185 fieldDescriptor fd; | |
2186 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
2187 target_class_type.equals(current_type()) && | |
2177
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diff
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|
2188 _klass->find_local_field(field_name, field_sig, &fd)) { |
0 | 2189 stack_object_type = current_type(); |
2190 } | |
2191 is_assignable = target_class_type.is_assignable_from( | |
2177
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diff
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|
2192 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2193 if (!is_assignable) { |
6605 | 2194 verify_error(ErrorContext::bad_type(bci, |
2195 current_frame->stack_top_ctx(), | |
2196 TypeOrigin::cp(index, target_class_type)), | |
2197 "Bad type on operand stack in putfield"); | |
0 | 2198 return; |
2199 } | |
2200 } | |
2201 check_protected: { | |
2202 if (_this_type == stack_object_type) | |
2203 break; // stack_object_type must be assignable to _current_class_type | |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2204 Symbol* ref_class_name = |
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2205 cp->klass_name_at(cp->klass_ref_index_at(index)); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2206 if (!name_in_supers(ref_class_name, current_class())) |
0 | 2207 // stack_object_type must be assignable to _current_class_type since: |
2208 // 1. stack_object_type must be assignable to ref_class. | |
2209 // 2. ref_class must be _current_class or a subclass of it. It can't | |
2210 // be a superclass of it. See revised JVMS 5.4.4. | |
2211 break; | |
2212 | |
6725
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6608
diff
changeset
|
2213 Klass* ref_class_oop = load_class(ref_class_name, CHECK); |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2214 if (is_protected_access(current_class(), ref_class_oop, field_name, |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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diff
changeset
|
2215 field_sig, false)) { |
0 | 2216 // It's protected access, check if stack object is assignable to |
2217 // current class. | |
2218 is_assignable = current_type().is_assignable_from( | |
2177
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diff
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|
2219 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2220 if (!is_assignable) { |
6605 | 2221 verify_error(ErrorContext::bad_type(bci, |
2222 current_frame->stack_top_ctx(), | |
2223 TypeOrigin::implicit(current_type())), | |
2224 "Bad access to protected data in getfield"); | |
0 | 2225 return; |
2226 } | |
2227 } | |
2228 break; | |
2229 } | |
2230 default: ShouldNotReachHere(); | |
2231 } | |
2232 } | |
2233 | |
2234 void ClassVerifier::verify_invoke_init( | |
6605 | 2235 RawBytecodeStream* bcs, u2 ref_class_index, VerificationType ref_class_type, |
0 | 2236 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, |
2237 constantPoolHandle cp, TRAPS) { | |
2238 u2 bci = bcs->bci(); | |
2239 VerificationType type = current_frame->pop_stack( | |
2240 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2241 if (type == VerificationType::uninitialized_this_type()) { | |
6155 | 2242 // The method must be an <init> method of this class or its superclass |
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6608
diff
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|
2243 Klass* superk = current_class()->super(); |
1677 | 2244 if (ref_class_type.name() != current_class()->name() && |
6725
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2245 ref_class_type.name() != superk->name()) { |
6605 | 2246 verify_error(ErrorContext::bad_type(bci, |
2247 TypeOrigin::implicit(ref_class_type), | |
2248 TypeOrigin::implicit(current_type())), | |
2249 "Bad <init> method call"); | |
0 | 2250 return; |
2251 } | |
2252 current_frame->initialize_object(type, current_type()); | |
2253 *this_uninit = true; | |
2254 } else if (type.is_uninitialized()) { | |
2255 u2 new_offset = type.bci(); | |
2256 address new_bcp = bcs->bcp() - bci + new_offset; | |
2257 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
6605 | 2258 /* Unreachable? Stack map parsing ensures valid type and new |
2259 * instructions have a valid BCI. */ | |
2260 verify_error(ErrorContext::bad_code(new_offset), | |
2261 "Expecting new instruction"); | |
0 | 2262 return; |
2263 } | |
2264 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
6605 | 2265 verify_cp_class_type(bci, new_class_index, cp, CHECK_VERIFY(this)); |
0 | 2266 |
2267 // The method must be an <init> method of the indicated class | |
2268 VerificationType new_class_type = cp_index_to_type( | |
2269 new_class_index, cp, CHECK_VERIFY(this)); | |
2270 if (!new_class_type.equals(ref_class_type)) { | |
6605 | 2271 verify_error(ErrorContext::bad_type(bci, |
2272 TypeOrigin::cp(new_class_index, new_class_type), | |
2273 TypeOrigin::cp(ref_class_index, ref_class_type)), | |
2274 "Call to wrong <init> method"); | |
0 | 2275 return; |
2276 } | |
2277 // According to the VM spec, if the referent class is a superclass of the | |
2278 // current class, and is in a different runtime package, and the method is | |
2279 // protected, then the objectref must be the current class or a subclass | |
2280 // of the current class. | |
2281 VerificationType objectref_type = new_class_type; | |
2282 if (name_in_supers(ref_class_type.name(), current_class())) { | |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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6608
diff
changeset
|
2283 Klass* ref_klass = load_class( |
0 | 2284 ref_class_type.name(), CHECK_VERIFY(this)); |
6725
da91efe96a93
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6608
diff
changeset
|
2285 Method* m = InstanceKlass::cast(ref_klass)->uncached_lookup_method( |
0 | 2286 vmSymbols::object_initializer_name(), |
1565 | 2287 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 2288 instanceKlassHandle mh(THREAD, m->method_holder()); |
2289 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
2290 bool assignable = current_type().is_assignable_from( | |
2177
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diff
changeset
|
2291 objectref_type, this, CHECK_VERIFY(this)); |
0 | 2292 if (!assignable) { |
6605 | 2293 verify_error(ErrorContext::bad_type(bci, |
2294 TypeOrigin::cp(new_class_index, objectref_type), | |
2295 TypeOrigin::implicit(current_type())), | |
2296 "Bad access to protected <init> method"); | |
0 | 2297 return; |
2298 } | |
2299 } | |
2300 } | |
2301 current_frame->initialize_object(type, new_class_type); | |
2302 } else { | |
6605 | 2303 verify_error(ErrorContext::bad_type(bci, current_frame->stack_top_ctx()), |
2304 "Bad operand type when invoking <init>"); | |
0 | 2305 return; |
2306 } | |
2307 } | |
2308 | |
2309 void ClassVerifier::verify_invoke_instructions( | |
2310 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
2311 bool *this_uninit, VerificationType return_type, | |
2312 constantPoolHandle cp, TRAPS) { | |
2313 // Make sure the constant pool item is the right type | |
1565 | 2314 u2 index = bcs->get_index_u2(); |
2315 Bytecodes::Code opcode = bcs->raw_code(); | |
6934 | 2316 unsigned int types; |
2317 switch (opcode) { | |
2318 case Bytecodes::_invokeinterface: | |
2319 types = 1 << JVM_CONSTANT_InterfaceMethodref; | |
2320 break; | |
2321 case Bytecodes::_invokedynamic: | |
2322 types = 1 << JVM_CONSTANT_InvokeDynamic; | |
2323 break; | |
2324 case Bytecodes::_invokespecial: | |
9066
09b0d3e9ba6c
8011671: JCK tests on static interface methods fail under b84: Illegal type at constant pool entry 5
bharadwaj
parents:
8819
diff
changeset
|
2325 case Bytecodes::_invokestatic: |
09b0d3e9ba6c
8011671: JCK tests on static interface methods fail under b84: Illegal type at constant pool entry 5
bharadwaj
parents:
8819
diff
changeset
|
2326 types = (_klass->major_version() < STATIC_METHOD_IN_INTERFACE_MAJOR_VERSION) ? |
09b0d3e9ba6c
8011671: JCK tests on static interface methods fail under b84: Illegal type at constant pool entry 5
bharadwaj
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8819
diff
changeset
|
2327 (1 << JVM_CONSTANT_Methodref) : |
09b0d3e9ba6c
8011671: JCK tests on static interface methods fail under b84: Illegal type at constant pool entry 5
bharadwaj
parents:
8819
diff
changeset
|
2328 ((1 << JVM_CONSTANT_InterfaceMethodref) | (1 << JVM_CONSTANT_Methodref)); |
09b0d3e9ba6c
8011671: JCK tests on static interface methods fail under b84: Illegal type at constant pool entry 5
bharadwaj
parents:
8819
diff
changeset
|
2329 break; |
6934 | 2330 default: |
2331 types = 1 << JVM_CONSTANT_Methodref; | |
2332 } | |
6605 | 2333 verify_cp_type(bcs->bci(), index, cp, types, CHECK_VERIFY(this)); |
0 | 2334 |
2335 // Get method name and signature | |
2177
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diff
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|
2336 Symbol* method_name = cp->name_ref_at(index); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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diff
changeset
|
2337 Symbol* method_sig = cp->signature_ref_at(index); |
0 | 2338 |
2339 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
2340 class_format_error( | |
2341 "Invalid method signature in class %s referenced " | |
2342 "from constant pool index %d", _klass->external_name(), index); | |
2343 return; | |
2344 } | |
2345 | |
2346 // Get referenced class type | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2347 VerificationType ref_class_type; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2348 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 2349 if (!EnableInvokeDynamic || |
2350 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2351 class_format_error( |
1602 | 2352 (!EnableInvokeDynamic ? |
2353 "invokedynamic instructions not enabled in this JVM" : | |
2354 "invokedynamic instructions not supported by this class file version"), | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2355 _klass->external_name()); |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2356 return; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2357 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2358 } else { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2359 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2360 } |
0 | 2361 |
2362 // For a small signature length, we just allocate 128 bytes instead | |
2363 // of parsing the signature once to find its size. | |
2364 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
2365 // longs/doubles to be consertive. | |
2366 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
2367 "buffer type must match VerificationType size"); | |
2368 uintptr_t on_stack_sig_types_buffer[128]; | |
2369 // If we make a VerificationType[128] array directly, the compiler calls | |
2370 // to the c-runtime library to do the allocation instead of just | |
2371 // stack allocating it. Plus it would run constructors. This shows up | |
2372 // in performance profiles. | |
2373 | |
2374 VerificationType* sig_types; | |
2375 int size = (method_sig->utf8_length() - 3) * 2; | |
2376 if (size > 128) { | |
2377 // Long and double occupies two slots here. | |
2378 ArgumentSizeComputer size_it(method_sig); | |
2379 size = size_it.size(); | |
2380 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
2381 } else{ | |
2382 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
2383 } | |
2384 SignatureStream sig_stream(method_sig); | |
2385 int sig_i = 0; | |
2386 while (!sig_stream.at_return_type()) { | |
2387 sig_i += change_sig_to_verificationType( | |
2388 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
2389 sig_stream.next(); | |
2390 } | |
2391 int nargs = sig_i; | |
2392 | |
2393 #ifdef ASSERT | |
2394 { | |
2395 ArgumentSizeComputer size_it(method_sig); | |
2396 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
2397 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
2398 } | |
2399 #endif | |
2400 | |
2401 // Check instruction operands | |
2402 u2 bci = bcs->bci(); | |
2403 if (opcode == Bytecodes::_invokeinterface) { | |
2404 address bcp = bcs->bcp(); | |
2405 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
2406 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
2407 // the difference between the size of the operand stack before and after the instruction | |
2408 // executes. | |
2409 if (*(bcp+3) != (nargs+1)) { | |
6605 | 2410 verify_error(ErrorContext::bad_code(bci), |
2411 "Inconsistent args count operand in invokeinterface"); | |
0 | 2412 return; |
2413 } | |
2414 if (*(bcp+4) != 0) { | |
6605 | 2415 verify_error(ErrorContext::bad_code(bci), |
2416 "Fourth operand byte of invokeinterface must be zero"); | |
0 | 2417 return; |
2418 } | |
2419 } | |
2420 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2421 if (opcode == Bytecodes::_invokedynamic) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2422 address bcp = bcs->bcp(); |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2423 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
6605 | 2424 verify_error(ErrorContext::bad_code(bci), |
2425 "Third and fourth operand bytes of invokedynamic must be zero"); | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2426 return; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2427 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2428 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2429 |
0 | 2430 if (method_name->byte_at(0) == '<') { |
2431 // Make sure <init> can only be invoked by invokespecial | |
2432 if (opcode != Bytecodes::_invokespecial || | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2433 method_name != vmSymbols::object_initializer_name()) { |
6605 | 2434 verify_error(ErrorContext::bad_code(bci), |
2435 "Illegal call to internal method"); | |
0 | 2436 return; |
2437 } | |
2438 } else if (opcode == Bytecodes::_invokespecial | |
2439 && !ref_class_type.equals(current_type()) | |
2440 && !ref_class_type.equals(VerificationType::reference_type( | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6608
diff
changeset
|
2441 current_class()->super()->name()))) { |
12891
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2442 bool subtype = false; |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2443 if (!current_class()->is_anonymous()) { |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2444 subtype = ref_class_type.is_assignable_from( |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2445 current_type(), this, CHECK_VERIFY(this)); |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2446 } else { |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2447 subtype = ref_class_type.is_assignable_from(VerificationType::reference_type( |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2448 current_class()->host_klass()->name()), this, CHECK_VERIFY(this)); |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2449 } |
0 | 2450 if (!subtype) { |
12891
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2451 verify_error(ErrorContext::bad_code(bci), |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2452 "Bad invokespecial instruction: " |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2453 "current class isn't assignable to reference class."); |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2454 return; |
0 | 2455 } |
2456 } | |
2457 // Match method descriptor with operand stack | |
2458 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2459 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2460 } | |
2461 // Check objectref on operand stack | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2462 if (opcode != Bytecodes::_invokestatic && |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2463 opcode != Bytecodes::_invokedynamic) { |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2464 if (method_name == vmSymbols::object_initializer_name()) { // <init> method |
6605 | 2465 verify_invoke_init(bcs, index, ref_class_type, current_frame, |
0 | 2466 code_length, this_uninit, cp, CHECK_VERIFY(this)); |
2467 } else { // other methods | |
2468 // Ensures that target class is assignable to method class. | |
2469 if (opcode == Bytecodes::_invokespecial) { | |
12827
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2470 if (!current_class()->is_anonymous()) { |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2471 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2472 } else { |
12891
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2473 // anonymous class invokespecial calls: check if the |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2474 // objectref is a subtype of the host_klass of the current class |
12827
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2475 // to allow an anonymous class to reference methods in the host_klass |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2476 VerificationType top = current_frame->pop_stack(CHECK_VERIFY(this)); |
12891
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2477 VerificationType hosttype = |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2478 VerificationType::reference_type(current_class()->host_klass()->name()); |
7114c4597ae3
8026365: NoClassDefinitionFound for anonymous class invokespecial.
acorn
parents:
12827
diff
changeset
|
2479 bool subtype = hosttype.is_assignable_from(top, this, CHECK_VERIFY(this)); |
12827
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2480 if (!subtype) { |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2481 verify_error( ErrorContext::bad_type(current_frame->offset(), |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2482 current_frame->stack_top_ctx(), |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2483 TypeOrigin::implicit(top)), |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2484 "Bad type on operand stack"); |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2485 return; |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2486 } |
c72075c2883e
8026022: Verifier: allow anon classes to invokespecial host class/intf methods.
acorn
parents:
12154
diff
changeset
|
2487 } |
0 | 2488 } else if (opcode == Bytecodes::_invokevirtual) { |
2489 VerificationType stack_object_type = | |
2490 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2491 if (current_type() != stack_object_type) { | |
2492 assert(cp->cache() == NULL, "not rewritten yet"); | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2493 Symbol* ref_class_name = |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2494 cp->klass_name_at(cp->klass_ref_index_at(index)); |
0 | 2495 // See the comments in verify_field_instructions() for |
2496 // the rationale behind this. | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2497 if (name_in_supers(ref_class_name, current_class())) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6608
diff
changeset
|
2498 Klass* ref_class = load_class(ref_class_name, CHECK); |
0 | 2499 if (is_protected_access( |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2500 _klass, ref_class, method_name, method_sig, true)) { |
0 | 2501 // It's protected access, check if stack object is |
2502 // assignable to current class. | |
2503 bool is_assignable = current_type().is_assignable_from( | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2504 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2505 if (!is_assignable) { |
2506 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2507 && stack_object_type.is_array() | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2508 && method_name == vmSymbols::clone_name()) { |
0 | 2509 // Special case: arrays pretend to implement public Object |
2510 // clone(). | |
2511 } else { | |
6605 | 2512 verify_error(ErrorContext::bad_type(bci, |
2513 current_frame->stack_top_ctx(), | |
2514 TypeOrigin::implicit(current_type())), | |
2515 "Bad access to protected data in invokevirtual"); | |
0 | 2516 return; |
2517 } | |
2518 } | |
2519 } | |
2520 } | |
2521 } | |
2522 } else { | |
2523 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2524 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2525 } | |
2526 } | |
2527 } | |
2528 // Push the result type. | |
2529 if (sig_stream.type() != T_VOID) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2530 if (method_name == vmSymbols::object_initializer_name()) { |
0 | 2531 // <init> method must have a void return type |
6605 | 2532 /* Unreachable? Class file parser verifies that methods with '<' have |
2533 * void return */ | |
2534 verify_error(ErrorContext::bad_code(bci), | |
2535 "Return type must be void in <init> method"); | |
0 | 2536 return; |
2537 } | |
2538 VerificationType return_type[2]; | |
2539 int n = change_sig_to_verificationType( | |
2540 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2541 for (int i = 0; i < n; i++) { | |
2542 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2543 } | |
2544 } | |
2545 } | |
2546 | |
2547 VerificationType ClassVerifier::get_newarray_type( | |
2548 u2 index, u2 bci, TRAPS) { | |
2549 const char* from_bt[] = { | |
2550 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2551 }; | |
2552 if (index < T_BOOLEAN || index > T_LONG) { | |
6605 | 2553 verify_error(ErrorContext::bad_code(bci), "Illegal newarray instruction"); |
0 | 2554 return VerificationType::bogus_type(); |
2555 } | |
2556 | |
2557 // from_bt[index] contains the array signature which has a length of 2 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2558 Symbol* sig = create_temporary_symbol( |
0 | 2559 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); |
2560 return VerificationType::reference_type(sig); | |
2561 } | |
2562 | |
2563 void ClassVerifier::verify_anewarray( | |
6605 | 2564 u2 bci, u2 index, constantPoolHandle cp, |
2565 StackMapFrame* current_frame, TRAPS) { | |
2566 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); | |
0 | 2567 current_frame->pop_stack( |
2568 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2569 | |
2570 VerificationType component_type = | |
2571 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2572 int length; | |
2573 char* arr_sig_str; | |
2574 if (component_type.is_array()) { // it's an array | |
2575 const char* component_name = component_type.name()->as_utf8(); | |
2576 // add one dimension to component | |
2577 length = (int)strlen(component_name) + 1; | |
2578 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2579 arr_sig_str[0] = '['; | |
2580 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2581 } else { // it's an object or interface | |
2582 const char* component_name = component_type.name()->as_utf8(); | |
2583 // add one dimension to component with 'L' prepended and ';' postpended. | |
2584 length = (int)strlen(component_name) + 3; | |
2585 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2586 arr_sig_str[0] = '['; | |
2587 arr_sig_str[1] = 'L'; | |
2588 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2589 arr_sig_str[length - 1] = ';'; | |
2590 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2591 Symbol* arr_sig = create_temporary_symbol( |
0 | 2592 arr_sig_str, length, CHECK_VERIFY(this)); |
2593 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2594 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2595 } | |
2596 | |
2597 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2598 current_frame->get_local( | |
2599 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2600 current_frame->push_stack( | |
2601 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2602 } | |
2603 | |
2604 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2605 current_frame->get_local_2( | |
2606 index, VerificationType::long_type(), | |
2607 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2608 current_frame->push_stack_2( | |
2609 VerificationType::long_type(), | |
2610 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2611 } | |
2612 | |
2613 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2614 current_frame->get_local( | |
2615 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2616 current_frame->push_stack( | |
2617 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2618 } | |
2619 | |
2620 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2621 current_frame->get_local_2( | |
2622 index, VerificationType::double_type(), | |
2623 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2624 current_frame->push_stack_2( | |
2625 VerificationType::double_type(), | |
2626 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2627 } | |
2628 | |
2629 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2630 VerificationType type = current_frame->get_local( | |
2631 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2632 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2633 } | |
2634 | |
2635 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2636 current_frame->pop_stack( | |
2637 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2638 current_frame->set_local( | |
2639 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2640 } | |
2641 | |
2642 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2643 current_frame->pop_stack_2( | |
2644 VerificationType::long2_type(), | |
2645 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2646 current_frame->set_local_2( | |
2647 index, VerificationType::long_type(), | |
2648 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2649 } | |
2650 | |
2651 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2652 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2653 current_frame->set_local( | |
2654 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2655 } | |
2656 | |
2657 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2658 current_frame->pop_stack_2( | |
2659 VerificationType::double2_type(), | |
2660 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2661 current_frame->set_local_2( | |
2662 index, VerificationType::double_type(), | |
2663 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2664 } | |
2665 | |
2666 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2667 VerificationType type = current_frame->pop_stack( | |
2668 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2669 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2670 } | |
2671 | |
2672 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2673 VerificationType type = current_frame->get_local( | |
2674 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2675 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2676 } | |
2677 | |
2678 void ClassVerifier::verify_return_value( | |
6605 | 2679 VerificationType return_type, VerificationType type, u2 bci, |
2680 StackMapFrame* current_frame, TRAPS) { | |
0 | 2681 if (return_type == VerificationType::bogus_type()) { |
6605 | 2682 verify_error(ErrorContext::bad_type(bci, |
2683 current_frame->stack_top_ctx(), TypeOrigin::signature(return_type)), | |
2684 "Method expects a return value"); | |
0 | 2685 return; |
2686 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2687 bool match = return_type.is_assignable_from(type, this, CHECK_VERIFY(this)); |
0 | 2688 if (!match) { |
6605 | 2689 verify_error(ErrorContext::bad_type(bci, |
2690 current_frame->stack_top_ctx(), TypeOrigin::signature(return_type)), | |
2691 "Bad return type"); | |
0 | 2692 return; |
2693 } | |
2694 } | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2695 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2696 // The verifier creates symbols which are substrings of Symbols. |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2697 // These are stored in the verifier until the end of verification so that |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2698 // they can be reference counted. |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2699 Symbol* ClassVerifier::create_temporary_symbol(const Symbol *s, int begin, |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2700 int end, TRAPS) { |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2701 Symbol* sym = SymbolTable::new_symbol(s, begin, end, CHECK_NULL); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2702 _symbols->push(sym); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2703 return sym; |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2704 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
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2705 |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
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2706 Symbol* ClassVerifier::create_temporary_symbol(const char *s, int length, TRAPS) { |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
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2707 Symbol* sym = SymbolTable::new_symbol(s, length, CHECK_NULL); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
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2708 _symbols->push(sym); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2709 return sym; |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1980
diff
changeset
|
2710 } |