Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/verifier.cpp @ 6885:685df3c6f84b
7045397: NPG: Add freelists to class loader arenas.
Reviewed-by: coleenp, stefank, jprovino, ohair
author | jmasa |
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date | Tue, 18 Sep 2012 23:35:42 -0700 |
parents | da91efe96a93 |
children | 4735d2c84362 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2012, 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 |
0 | 66 // Access to external entry for VerifyClassCodes - old byte code verifier |
67 | |
68 extern "C" { | |
69 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
70 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
71 } | |
72 | |
73 static void* volatile _verify_byte_codes_fn = NULL; | |
74 | |
75 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
76 | |
77 static void* verify_byte_codes_fn() { | |
78 if (_verify_byte_codes_fn == NULL) { | |
79 void *lib_handle = os::native_java_library(); | |
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80 void *func = os::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); |
0 | 81 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
82 if (func == NULL) { | |
83 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
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84 func = os::dll_lookup(lib_handle, "VerifyClassCodes"); |
0 | 85 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
86 } | |
87 } | |
88 return (void*)_verify_byte_codes_fn; | |
89 } | |
90 | |
91 | |
92 // Methods in Verifier | |
93 | |
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94 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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95 return (class_loader == NULL || !should_verify_class) ? |
0 | 96 BytecodeVerificationLocal : BytecodeVerificationRemote; |
97 } | |
98 | |
99 bool Verifier::relax_verify_for(oop loader) { | |
100 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
101 bool need_verify = | |
102 // verifyAll | |
103 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
104 // verifyRemote | |
105 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
106 return !need_verify; | |
107 } | |
108 | |
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109 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
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110 HandleMark hm; |
0 | 111 ResourceMark rm(THREAD); |
112 | |
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113 Symbol* exception_name = NULL; |
0 | 114 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; |
115 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
6605 | 116 char* exception_message = message_buffer; |
0 | 117 |
118 const char* klassName = klass->external_name(); | |
6605 | 119 bool can_failover = FailOverToOldVerifier && |
120 klass->major_version() < NOFAILOVER_MAJOR_VERSION; | |
0 | 121 |
122 // If the class should be verified, first see if we can use the split | |
123 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
124 // is set, then call the inference verifier. | |
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125 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 126 if (TraceClassInitialization) { |
127 tty->print_cr("Start class verification for: %s", klassName); | |
128 } | |
129 if (UseSplitVerifier && | |
130 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
6605 | 131 ClassVerifier split_verifier(klass, THREAD); |
132 split_verifier.verify_class(THREAD); | |
133 exception_name = split_verifier.result(); | |
134 if (can_failover && !HAS_PENDING_EXCEPTION && | |
0 | 135 (exception_name == vmSymbols::java_lang_VerifyError() || |
136 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
6605 | 137 if (TraceClassInitialization || VerboseVerification) { |
0 | 138 tty->print_cr( |
139 "Fail over class verification to old verifier for: %s", klassName); | |
140 } | |
141 exception_name = inference_verify( | |
142 klass, message_buffer, message_buffer_len, THREAD); | |
143 } | |
6605 | 144 if (exception_name != NULL) { |
145 exception_message = split_verifier.exception_message(); | |
146 } | |
0 | 147 } else { |
148 exception_name = inference_verify( | |
149 klass, message_buffer, message_buffer_len, THREAD); | |
150 } | |
151 | |
6605 | 152 if (TraceClassInitialization || VerboseVerification) { |
0 | 153 if (HAS_PENDING_EXCEPTION) { |
154 tty->print("Verification for %s has", klassName); | |
155 tty->print_cr(" exception pending %s ", | |
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156 InstanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); |
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157 } else if (exception_name != NULL) { |
0 | 158 tty->print_cr("Verification for %s failed", klassName); |
159 } | |
160 tty->print_cr("End class verification for: %s", klassName); | |
161 } | |
162 } | |
163 | |
164 if (HAS_PENDING_EXCEPTION) { | |
165 return false; // use the existing exception | |
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166 } else if (exception_name == NULL) { |
0 | 167 return true; // verifcation succeeded |
168 } else { // VerifyError or ClassFormatError to be created and thrown | |
169 ResourceMark rm(THREAD); | |
170 instanceKlassHandle kls = | |
171 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
172 while (!kls.is_null()) { | |
173 if (kls == klass) { | |
174 // If the class being verified is the exception we're creating | |
175 // or one of it's superclasses, we're in trouble and are going | |
176 // to infinitely recurse when we try to initialize the exception. | |
177 // So bail out here by throwing the preallocated VM error. | |
178 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
179 } | |
180 kls = kls->super(); | |
181 } | |
182 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
6605 | 183 THROW_MSG_(exception_name, exception_message, false); |
0 | 184 } |
185 } | |
186 | |
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187 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
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188 Symbol* name = klass->name(); |
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189 Klass* refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 190 |
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191 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 192 // return if the class is a bootstrapping class |
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193 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 194 // We need to skip the following four for bootstraping |
195 name != vmSymbols::java_lang_Object() && | |
196 name != vmSymbols::java_lang_Class() && | |
197 name != vmSymbols::java_lang_String() && | |
198 name != vmSymbols::java_lang_Throwable() && | |
199 | |
200 // Can not verify the bytecodes for shared classes because they have | |
201 // already been rewritten to contain constant pool cache indices, | |
202 // which the verifier can't understand. | |
203 // Shared classes shouldn't have stackmaps either. | |
204 !klass()->is_shared() && | |
205 | |
206 // As of the fix for 4486457 we disable verification for all of the | |
207 // dynamically-generated bytecodes associated with the 1.4 | |
208 // reflection implementation, not just those associated with | |
209 // sun/reflect/SerializationConstructorAccessor. | |
210 // NOTE: this is called too early in the bootstrapping process to be | |
211 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
212 (refl_magic_klass == NULL || | |
213 !klass->is_subtype_of(refl_magic_klass) || | |
214 VerifyReflectionBytecodes) | |
215 ); | |
216 } | |
217 | |
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218 Symbol* Verifier::inference_verify( |
0 | 219 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { |
220 JavaThread* thread = (JavaThread*)THREAD; | |
221 JNIEnv *env = thread->jni_environment(); | |
222 | |
223 void* verify_func = verify_byte_codes_fn(); | |
224 | |
225 if (verify_func == NULL) { | |
226 jio_snprintf(message, message_len, "Could not link verifier"); | |
227 return vmSymbols::java_lang_VerifyError(); | |
228 } | |
229 | |
230 ResourceMark rm(THREAD); | |
6605 | 231 if (VerboseVerification) { |
0 | 232 tty->print_cr("Verifying class %s with old format", klass->external_name()); |
233 } | |
234 | |
235 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
236 jint result; | |
237 | |
238 { | |
239 HandleMark hm(thread); | |
240 ThreadToNativeFromVM ttn(thread); | |
241 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
242 // code knows that we have left the VM | |
243 | |
244 if (_is_new_verify_byte_codes_fn) { | |
245 verify_byte_codes_fn_new_t func = | |
246 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
247 result = (*func)(env, cls, message, (int)message_len, | |
248 klass->major_version()); | |
249 } else { | |
250 verify_byte_codes_fn_t func = | |
251 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
252 result = (*func)(env, cls, message, (int)message_len); | |
253 } | |
254 } | |
255 | |
256 JNIHandles::destroy_local(cls); | |
257 | |
258 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
259 // to be changed (still return jboolean (unsigned char)), and result is | |
260 // 1 when verification is passed. | |
261 if (result == 0) { | |
262 return vmSymbols::java_lang_VerifyError(); | |
263 } else if (result == 1) { | |
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264 return NULL; // verified. |
0 | 265 } else if (result == 2) { |
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266 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, NULL); |
0 | 267 } else if (result == 3) { |
268 return vmSymbols::java_lang_ClassFormatError(); | |
269 } else { | |
270 ShouldNotReachHere(); | |
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271 return NULL; |
0 | 272 } |
273 } | |
274 | |
6605 | 275 TypeOrigin TypeOrigin::null() { |
276 return TypeOrigin(); | |
277 } | |
278 TypeOrigin TypeOrigin::local(u2 index, StackMapFrame* frame) { | |
279 assert(frame != NULL, "Must have a frame"); | |
280 return TypeOrigin(CF_LOCALS, index, StackMapFrame::copy(frame), | |
281 frame->local_at(index)); | |
282 } | |
283 TypeOrigin TypeOrigin::stack(u2 index, StackMapFrame* frame) { | |
284 assert(frame != NULL, "Must have a frame"); | |
285 return TypeOrigin(CF_STACK, index, StackMapFrame::copy(frame), | |
286 frame->stack_at(index)); | |
287 } | |
288 TypeOrigin TypeOrigin::sm_local(u2 index, StackMapFrame* frame) { | |
289 assert(frame != NULL, "Must have a frame"); | |
290 return TypeOrigin(SM_LOCALS, index, StackMapFrame::copy(frame), | |
291 frame->local_at(index)); | |
292 } | |
293 TypeOrigin TypeOrigin::sm_stack(u2 index, StackMapFrame* frame) { | |
294 assert(frame != NULL, "Must have a frame"); | |
295 return TypeOrigin(SM_STACK, index, StackMapFrame::copy(frame), | |
296 frame->stack_at(index)); | |
297 } | |
298 TypeOrigin TypeOrigin::bad_index(u2 index) { | |
299 return TypeOrigin(BAD_INDEX, index, NULL, VerificationType::bogus_type()); | |
300 } | |
301 TypeOrigin TypeOrigin::cp(u2 index, VerificationType vt) { | |
302 return TypeOrigin(CONST_POOL, index, NULL, vt); | |
303 } | |
304 TypeOrigin TypeOrigin::signature(VerificationType vt) { | |
305 return TypeOrigin(SIG, 0, NULL, vt); | |
306 } | |
307 TypeOrigin TypeOrigin::implicit(VerificationType t) { | |
308 return TypeOrigin(IMPLICIT, 0, NULL, t); | |
309 } | |
310 TypeOrigin TypeOrigin::frame(StackMapFrame* frame) { | |
311 return TypeOrigin(FRAME_ONLY, 0, StackMapFrame::copy(frame), | |
312 VerificationType::bogus_type()); | |
313 } | |
314 | |
315 void TypeOrigin::reset_frame() { | |
316 if (_frame != NULL) { | |
317 _frame->restore(); | |
318 } | |
319 } | |
320 | |
321 void TypeOrigin::details(outputStream* ss) const { | |
322 _type.print_on(ss); | |
323 switch (_origin) { | |
324 case CF_LOCALS: | |
325 ss->print(" (current frame, locals[%d])", _index); | |
326 break; | |
327 case CF_STACK: | |
328 ss->print(" (current frame, stack[%d])", _index); | |
329 break; | |
330 case SM_LOCALS: | |
331 ss->print(" (stack map, locals[%d])", _index); | |
332 break; | |
333 case SM_STACK: | |
334 ss->print(" (stack map, stack[%d])", _index); | |
335 break; | |
336 case CONST_POOL: | |
337 ss->print(" (constant pool %d)", _index); | |
338 break; | |
339 case SIG: | |
340 ss->print(" (from method signature)"); | |
341 break; | |
342 case IMPLICIT: | |
343 case FRAME_ONLY: | |
344 case NONE: | |
345 default: | |
346 ; | |
347 } | |
348 } | |
349 | |
350 #ifdef ASSERT | |
351 void TypeOrigin::print_on(outputStream* str) const { | |
352 str->print("{%d,%d,%p:", _origin, _index, _frame); | |
353 if (_frame != NULL) { | |
354 _frame->print_on(str); | |
355 } else { | |
356 str->print("null"); | |
357 } | |
358 str->print(","); | |
359 _type.print_on(str); | |
360 str->print("}"); | |
361 } | |
362 #endif | |
363 | |
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364 void ErrorContext::details(outputStream* ss, Method* method) const { |
6605 | 365 if (is_valid()) { |
366 ss->print_cr(""); | |
367 ss->print_cr("Exception Details:"); | |
368 location_details(ss, method); | |
369 reason_details(ss); | |
370 frame_details(ss); | |
371 bytecode_details(ss, method); | |
372 handler_details(ss, method); | |
373 stackmap_details(ss, method); | |
374 } | |
375 } | |
376 | |
377 void ErrorContext::reason_details(outputStream* ss) const { | |
378 streamIndentor si(ss); | |
379 ss->indent().print_cr("Reason:"); | |
380 streamIndentor si2(ss); | |
381 ss->indent().print(""); | |
382 switch (_fault) { | |
383 case INVALID_BYTECODE: | |
384 ss->print("Error exists in the bytecode"); | |
385 break; | |
386 case WRONG_TYPE: | |
387 if (_expected.is_valid()) { | |
388 ss->print("Type "); | |
389 _type.details(ss); | |
390 ss->print(" is not assignable to "); | |
391 _expected.details(ss); | |
392 } else { | |
393 ss->print("Invalid type: "); | |
394 _type.details(ss); | |
395 } | |
396 break; | |
397 case FLAGS_MISMATCH: | |
398 if (_expected.is_valid()) { | |
399 ss->print("Current frame's flags are not assignable " | |
400 "to stack map frame's."); | |
401 } else { | |
402 ss->print("Current frame's flags are invalid in this context."); | |
403 } | |
404 break; | |
405 case BAD_CP_INDEX: | |
406 ss->print("Constant pool index %d is invalid", _type.index()); | |
407 break; | |
408 case BAD_LOCAL_INDEX: | |
409 ss->print("Local index %d is invalid", _type.index()); | |
410 break; | |
411 case LOCALS_SIZE_MISMATCH: | |
412 ss->print("Current frame's local size doesn't match stackmap."); | |
413 break; | |
414 case STACK_SIZE_MISMATCH: | |
415 ss->print("Current frame's stack size doesn't match stackmap."); | |
416 break; | |
417 case STACK_OVERFLOW: | |
418 ss->print("Exceeded max stack size."); | |
419 break; | |
420 case STACK_UNDERFLOW: | |
421 ss->print("Attempt to pop empty stack."); | |
422 break; | |
423 case MISSING_STACKMAP: | |
424 ss->print("Expected stackmap frame at this location."); | |
425 break; | |
426 case BAD_STACKMAP: | |
427 ss->print("Invalid stackmap specification."); | |
428 break; | |
429 case UNKNOWN: | |
430 default: | |
431 ShouldNotReachHere(); | |
432 ss->print_cr("Unknown"); | |
433 } | |
434 ss->print_cr(""); | |
435 } | |
436 | |
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437 void ErrorContext::location_details(outputStream* ss, Method* method) const { |
6605 | 438 if (_bci != -1 && method != NULL) { |
439 streamIndentor si(ss); | |
440 const char* bytecode_name = "<invalid>"; | |
441 if (method->validate_bci_from_bcx(_bci) != -1) { | |
442 Bytecodes::Code code = Bytecodes::code_or_bp_at(method->bcp_from(_bci)); | |
443 if (Bytecodes::is_defined(code)) { | |
444 bytecode_name = Bytecodes::name(code); | |
445 } else { | |
446 bytecode_name = "<illegal>"; | |
447 } | |
448 } | |
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449 InstanceKlass* ik = InstanceKlass::cast(method->method_holder()); |
6605 | 450 ss->indent().print_cr("Location:"); |
451 streamIndentor si2(ss); | |
452 ss->indent().print_cr("%s.%s%s @%d: %s", | |
453 ik->name()->as_C_string(), method->name()->as_C_string(), | |
454 method->signature()->as_C_string(), _bci, bytecode_name); | |
455 } | |
456 } | |
457 | |
458 void ErrorContext::frame_details(outputStream* ss) const { | |
459 streamIndentor si(ss); | |
460 if (_type.is_valid() && _type.frame() != NULL) { | |
461 ss->indent().print_cr("Current Frame:"); | |
462 streamIndentor si2(ss); | |
463 _type.frame()->print_on(ss); | |
464 } | |
465 if (_expected.is_valid() && _expected.frame() != NULL) { | |
466 ss->indent().print_cr("Stackmap Frame:"); | |
467 streamIndentor si2(ss); | |
468 _expected.frame()->print_on(ss); | |
469 } | |
470 } | |
471 | |
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472 void ErrorContext::bytecode_details(outputStream* ss, Method* method) const { |
6605 | 473 if (method != NULL) { |
474 streamIndentor si(ss); | |
475 ss->indent().print_cr("Bytecode:"); | |
476 streamIndentor si2(ss); | |
477 ss->print_data(method->code_base(), method->code_size(), false); | |
478 } | |
479 } | |
480 | |
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481 void ErrorContext::handler_details(outputStream* ss, Method* method) const { |
6605 | 482 if (method != NULL) { |
483 streamIndentor si(ss); | |
484 ExceptionTable table(method); | |
485 if (table.length() > 0) { | |
486 ss->indent().print_cr("Exception Handler Table:"); | |
487 streamIndentor si2(ss); | |
488 for (int i = 0; i < table.length(); ++i) { | |
489 ss->indent().print_cr("bci [%d, %d] => handler: %d", table.start_pc(i), | |
490 table.end_pc(i), table.handler_pc(i)); | |
491 } | |
492 } | |
493 } | |
494 } | |
495 | |
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496 void ErrorContext::stackmap_details(outputStream* ss, Method* method) const { |
6605 | 497 if (method != NULL && method->has_stackmap_table()) { |
498 streamIndentor si(ss); | |
499 ss->indent().print_cr("Stackmap Table:"); | |
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500 Array<u1>* data = method->stackmap_data(); |
6605 | 501 stack_map_table* sm_table = |
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502 stack_map_table::at((address)data->adr_at(0)); |
6605 | 503 stack_map_frame* sm_frame = sm_table->entries(); |
504 streamIndentor si2(ss); | |
505 int current_offset = -1; | |
506 for (u2 i = 0; i < sm_table->number_of_entries(); ++i) { | |
507 ss->indent(); | |
508 sm_frame->print_on(ss, current_offset); | |
509 ss->print_cr(""); | |
510 current_offset += sm_frame->offset_delta(); | |
511 sm_frame = sm_frame->next(); | |
512 } | |
513 } | |
514 } | |
515 | |
0 | 516 // Methods in ClassVerifier |
517 | |
518 ClassVerifier::ClassVerifier( | |
6605 | 519 instanceKlassHandle klass, TRAPS) |
520 : _thread(THREAD), _exception_type(NULL), _message(NULL), _klass(klass) { | |
0 | 521 _this_type = VerificationType::reference_type(klass->name()); |
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522 // Create list to hold symbols in reference area. |
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523 _symbols = new GrowableArray<Symbol*>(100, 0, NULL); |
0 | 524 } |
525 | |
526 ClassVerifier::~ClassVerifier() { | |
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527 // Decrement the reference count for any symbols created. |
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528 for (int i = 0; i < _symbols->length(); i++) { |
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529 Symbol* s = _symbols->at(i); |
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530 s->decrement_refcount(); |
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531 } |
0 | 532 } |
533 | |
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534 VerificationType ClassVerifier::object_type() const { |
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535 return VerificationType::reference_type(vmSymbols::java_lang_Object()); |
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536 } |
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537 |
6605 | 538 TypeOrigin ClassVerifier::ref_ctx(const char* sig, TRAPS) { |
539 VerificationType vt = VerificationType::reference_type( | |
540 create_temporary_symbol(sig, (int)strlen(sig), THREAD)); | |
541 return TypeOrigin::implicit(vt); | |
542 } | |
543 | |
0 | 544 void ClassVerifier::verify_class(TRAPS) { |
6605 | 545 if (VerboseVerification) { |
0 | 546 tty->print_cr("Verifying class %s with new format", |
547 _klass->external_name()); | |
548 } | |
549 | |
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550 Array<Method*>* methods = _klass->methods(); |
0 | 551 int num_methods = methods->length(); |
552 | |
553 for (int index = 0; index < num_methods; index++) { | |
1570 | 554 // Check for recursive re-verification before each method. |
555 if (was_recursively_verified()) return; | |
556 | |
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557 Method* m = methods->at(index); |
0 | 558 if (m->is_native() || m->is_abstract()) { |
559 // If m is native or abstract, skip it. It is checked in class file | |
560 // parser that methods do not override a final method. | |
561 continue; | |
562 } | |
563 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
564 } | |
1570 | 565 |
6605 | 566 if (VerboseVerification || TraceClassInitialization) { |
1570 | 567 if (was_recursively_verified()) |
568 tty->print_cr("Recursive verification detected for: %s", | |
569 _klass->external_name()); | |
570 } | |
0 | 571 } |
572 | |
573 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
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574 HandleMark hm(THREAD); |
0 | 575 _method = m; // initialize _method |
6605 | 576 if (VerboseVerification) { |
0 | 577 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); |
578 } | |
579 | |
580 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
581 | |
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582 int32_t max_stack = m->verifier_max_stack(); |
0 | 583 int32_t max_locals = m->max_locals(); |
584 constantPoolHandle cp(THREAD, m->constants()); | |
585 | |
586 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
587 class_format_error("Invalid method signature"); | |
588 return; | |
589 } | |
590 | |
591 // Initial stack map frame: offset is 0, stack is initially empty. | |
592 StackMapFrame current_frame(max_locals, max_stack, this); | |
593 // Set initial locals | |
594 VerificationType return_type = current_frame.set_locals_from_arg( | |
595 m, current_type(), CHECK_VERIFY(this)); | |
596 | |
597 int32_t stackmap_index = 0; // index to the stackmap array | |
598 | |
599 u4 code_length = m->code_size(); | |
600 | |
601 // Scan the bytecode and map each instruction's start offset to a number. | |
602 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
603 | |
604 int ex_min = code_length; | |
605 int ex_max = -1; | |
606 // Look through each item on the exception table. Each of the fields must refer | |
607 // to a legal instruction. | |
608 verify_exception_handler_table( | |
609 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
610 | |
611 // Look through each entry on the local variable table and make sure | |
612 // its range of code array offsets is valid. (4169817) | |
613 if (m->has_localvariable_table()) { | |
614 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
615 } | |
616 | |
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617 Array<u1>* stackmap_data = m->stackmap_data(); |
0 | 618 StackMapStream stream(stackmap_data); |
619 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
620 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
621 code_data, code_length, CHECK_VERIFY(this)); | |
622 | |
6605 | 623 if (VerboseVerification) { |
624 stackmap_table.print_on(tty); | |
0 | 625 } |
626 | |
627 RawBytecodeStream bcs(m); | |
628 | |
629 // Scan the byte code linearly from the start to the end | |
630 bool no_control_flow = false; // Set to true when there is no direct control | |
631 // flow from current instruction to the next | |
632 // instruction in sequence | |
633 Bytecodes::Code opcode; | |
634 while (!bcs.is_last_bytecode()) { | |
1570 | 635 // Check for recursive re-verification before each bytecode. |
636 if (was_recursively_verified()) return; | |
637 | |
0 | 638 opcode = bcs.raw_next(); |
639 u2 bci = bcs.bci(); | |
640 | |
641 // Set current frame's offset to bci | |
642 current_frame.set_offset(bci); | |
6605 | 643 current_frame.set_mark(); |
0 | 644 |
645 // Make sure every offset in stackmap table point to the beginning to | |
646 // an instruction. Match current_frame to stackmap_table entry with | |
647 // the same offset if exists. | |
648 stackmap_index = verify_stackmap_table( | |
649 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
650 no_control_flow, CHECK_VERIFY(this)); | |
651 | |
6605 | 652 |
0 | 653 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' |
654 | |
655 // Merge with the next instruction | |
656 { | |
657 u2 index; | |
658 int target; | |
659 VerificationType type, type2; | |
660 VerificationType atype; | |
661 | |
662 #ifndef PRODUCT | |
6605 | 663 if (VerboseVerification) { |
664 current_frame.print_on(tty); | |
0 | 665 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); |
666 } | |
667 #endif | |
668 | |
669 // Make sure wide instruction is in correct format | |
670 if (bcs.is_wide()) { | |
671 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
672 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
673 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
674 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
675 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
676 opcode != Bytecodes::_dstore) { | |
6605 | 677 /* Unreachable? RawBytecodeStream's raw_next() returns 'illegal' |
678 * if we encounter a wide instruction that modifies an invalid | |
679 * opcode (not one of the ones listed above) */ | |
680 verify_error(ErrorContext::bad_code(bci), "Bad wide instruction"); | |
0 | 681 return; |
682 } | |
683 } | |
684 | |
685 switch (opcode) { | |
686 case Bytecodes::_nop : | |
687 no_control_flow = false; break; | |
688 case Bytecodes::_aconst_null : | |
689 current_frame.push_stack( | |
690 VerificationType::null_type(), CHECK_VERIFY(this)); | |
691 no_control_flow = false; break; | |
692 case Bytecodes::_iconst_m1 : | |
693 case Bytecodes::_iconst_0 : | |
694 case Bytecodes::_iconst_1 : | |
695 case Bytecodes::_iconst_2 : | |
696 case Bytecodes::_iconst_3 : | |
697 case Bytecodes::_iconst_4 : | |
698 case Bytecodes::_iconst_5 : | |
699 current_frame.push_stack( | |
700 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
701 no_control_flow = false; break; | |
702 case Bytecodes::_lconst_0 : | |
703 case Bytecodes::_lconst_1 : | |
704 current_frame.push_stack_2( | |
705 VerificationType::long_type(), | |
706 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
707 no_control_flow = false; break; | |
708 case Bytecodes::_fconst_0 : | |
709 case Bytecodes::_fconst_1 : | |
710 case Bytecodes::_fconst_2 : | |
711 current_frame.push_stack( | |
712 VerificationType::float_type(), CHECK_VERIFY(this)); | |
713 no_control_flow = false; break; | |
714 case Bytecodes::_dconst_0 : | |
715 case Bytecodes::_dconst_1 : | |
716 current_frame.push_stack_2( | |
717 VerificationType::double_type(), | |
718 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
719 no_control_flow = false; break; | |
720 case Bytecodes::_sipush : | |
721 case Bytecodes::_bipush : | |
722 current_frame.push_stack( | |
723 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
724 no_control_flow = false; break; | |
725 case Bytecodes::_ldc : | |
726 verify_ldc( | |
1565 | 727 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 728 cp, bci, CHECK_VERIFY(this)); |
729 no_control_flow = false; break; | |
730 case Bytecodes::_ldc_w : | |
731 case Bytecodes::_ldc2_w : | |
732 verify_ldc( | |
1565 | 733 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 734 cp, bci, CHECK_VERIFY(this)); |
735 no_control_flow = false; break; | |
736 case Bytecodes::_iload : | |
737 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
738 no_control_flow = false; break; | |
739 case Bytecodes::_iload_0 : | |
740 case Bytecodes::_iload_1 : | |
741 case Bytecodes::_iload_2 : | |
742 case Bytecodes::_iload_3 : | |
743 index = opcode - Bytecodes::_iload_0; | |
744 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
745 no_control_flow = false; break; | |
746 case Bytecodes::_lload : | |
747 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
748 no_control_flow = false; break; | |
749 case Bytecodes::_lload_0 : | |
750 case Bytecodes::_lload_1 : | |
751 case Bytecodes::_lload_2 : | |
752 case Bytecodes::_lload_3 : | |
753 index = opcode - Bytecodes::_lload_0; | |
754 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
755 no_control_flow = false; break; | |
756 case Bytecodes::_fload : | |
757 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
758 no_control_flow = false; break; | |
759 case Bytecodes::_fload_0 : | |
760 case Bytecodes::_fload_1 : | |
761 case Bytecodes::_fload_2 : | |
762 case Bytecodes::_fload_3 : | |
763 index = opcode - Bytecodes::_fload_0; | |
764 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
765 no_control_flow = false; break; | |
766 case Bytecodes::_dload : | |
767 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
768 no_control_flow = false; break; | |
769 case Bytecodes::_dload_0 : | |
770 case Bytecodes::_dload_1 : | |
771 case Bytecodes::_dload_2 : | |
772 case Bytecodes::_dload_3 : | |
773 index = opcode - Bytecodes::_dload_0; | |
774 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
775 no_control_flow = false; break; | |
776 case Bytecodes::_aload : | |
777 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
778 no_control_flow = false; break; | |
779 case Bytecodes::_aload_0 : | |
780 case Bytecodes::_aload_1 : | |
781 case Bytecodes::_aload_2 : | |
782 case Bytecodes::_aload_3 : | |
783 index = opcode - Bytecodes::_aload_0; | |
784 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
785 no_control_flow = false; break; | |
786 case Bytecodes::_iaload : | |
787 type = current_frame.pop_stack( | |
788 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
789 atype = current_frame.pop_stack( | |
790 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
791 if (!atype.is_int_array()) { | |
6605 | 792 verify_error(ErrorContext::bad_type(bci, |
793 current_frame.stack_top_ctx(), ref_ctx("[I", THREAD)), | |
794 bad_type_msg, "iaload"); | |
0 | 795 return; |
796 } | |
797 current_frame.push_stack( | |
798 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
799 no_control_flow = false; break; | |
800 case Bytecodes::_baload : | |
801 type = current_frame.pop_stack( | |
802 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
803 atype = current_frame.pop_stack( | |
804 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
805 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
6605 | 806 verify_error( |
807 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
808 bad_type_msg, "baload"); | |
0 | 809 return; |
810 } | |
811 current_frame.push_stack( | |
812 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
813 no_control_flow = false; break; | |
814 case Bytecodes::_caload : | |
815 type = current_frame.pop_stack( | |
816 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
817 atype = current_frame.pop_stack( | |
818 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
819 if (!atype.is_char_array()) { | |
6605 | 820 verify_error(ErrorContext::bad_type(bci, |
821 current_frame.stack_top_ctx(), ref_ctx("[C", THREAD)), | |
822 bad_type_msg, "caload"); | |
0 | 823 return; |
824 } | |
825 current_frame.push_stack( | |
826 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
827 no_control_flow = false; break; | |
828 case Bytecodes::_saload : | |
829 type = current_frame.pop_stack( | |
830 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
831 atype = current_frame.pop_stack( | |
832 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
833 if (!atype.is_short_array()) { | |
6605 | 834 verify_error(ErrorContext::bad_type(bci, |
835 current_frame.stack_top_ctx(), ref_ctx("[S", THREAD)), | |
836 bad_type_msg, "saload"); | |
0 | 837 return; |
838 } | |
839 current_frame.push_stack( | |
840 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
841 no_control_flow = false; break; | |
842 case Bytecodes::_laload : | |
843 type = current_frame.pop_stack( | |
844 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
845 atype = current_frame.pop_stack( | |
846 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
847 if (!atype.is_long_array()) { | |
6605 | 848 verify_error(ErrorContext::bad_type(bci, |
849 current_frame.stack_top_ctx(), ref_ctx("[J", THREAD)), | |
850 bad_type_msg, "laload"); | |
0 | 851 return; |
852 } | |
853 current_frame.push_stack_2( | |
854 VerificationType::long_type(), | |
855 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
856 no_control_flow = false; break; | |
857 case Bytecodes::_faload : | |
858 type = current_frame.pop_stack( | |
859 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
860 atype = current_frame.pop_stack( | |
861 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
862 if (!atype.is_float_array()) { | |
6605 | 863 verify_error(ErrorContext::bad_type(bci, |
864 current_frame.stack_top_ctx(), ref_ctx("[F", THREAD)), | |
865 bad_type_msg, "faload"); | |
0 | 866 return; |
867 } | |
868 current_frame.push_stack( | |
869 VerificationType::float_type(), CHECK_VERIFY(this)); | |
870 no_control_flow = false; break; | |
871 case Bytecodes::_daload : | |
872 type = current_frame.pop_stack( | |
873 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
874 atype = current_frame.pop_stack( | |
875 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
876 if (!atype.is_double_array()) { | |
6605 | 877 verify_error(ErrorContext::bad_type(bci, |
878 current_frame.stack_top_ctx(), ref_ctx("[D", THREAD)), | |
879 bad_type_msg, "daload"); | |
0 | 880 return; |
881 } | |
882 current_frame.push_stack_2( | |
883 VerificationType::double_type(), | |
884 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
885 no_control_flow = false; break; | |
886 case Bytecodes::_aaload : { | |
887 type = current_frame.pop_stack( | |
888 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
889 atype = current_frame.pop_stack( | |
890 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
891 if (!atype.is_reference_array()) { | |
6605 | 892 verify_error(ErrorContext::bad_type(bci, |
893 current_frame.stack_top_ctx(), | |
894 TypeOrigin::implicit(VerificationType::reference_check())), | |
895 bad_type_msg, "aaload"); | |
0 | 896 return; |
897 } | |
898 if (atype.is_null()) { | |
899 current_frame.push_stack( | |
900 VerificationType::null_type(), CHECK_VERIFY(this)); | |
901 } else { | |
902 VerificationType component = | |
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903 atype.get_component(this, CHECK_VERIFY(this)); |
0 | 904 current_frame.push_stack(component, CHECK_VERIFY(this)); |
905 } | |
906 no_control_flow = false; break; | |
907 } | |
908 case Bytecodes::_istore : | |
909 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
910 no_control_flow = false; break; | |
911 case Bytecodes::_istore_0 : | |
912 case Bytecodes::_istore_1 : | |
913 case Bytecodes::_istore_2 : | |
914 case Bytecodes::_istore_3 : | |
915 index = opcode - Bytecodes::_istore_0; | |
916 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
917 no_control_flow = false; break; | |
918 case Bytecodes::_lstore : | |
919 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
920 no_control_flow = false; break; | |
921 case Bytecodes::_lstore_0 : | |
922 case Bytecodes::_lstore_1 : | |
923 case Bytecodes::_lstore_2 : | |
924 case Bytecodes::_lstore_3 : | |
925 index = opcode - Bytecodes::_lstore_0; | |
926 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
927 no_control_flow = false; break; | |
928 case Bytecodes::_fstore : | |
929 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
930 no_control_flow = false; break; | |
931 case Bytecodes::_fstore_0 : | |
932 case Bytecodes::_fstore_1 : | |
933 case Bytecodes::_fstore_2 : | |
934 case Bytecodes::_fstore_3 : | |
935 index = opcode - Bytecodes::_fstore_0; | |
936 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
937 no_control_flow = false; break; | |
938 case Bytecodes::_dstore : | |
939 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
940 no_control_flow = false; break; | |
941 case Bytecodes::_dstore_0 : | |
942 case Bytecodes::_dstore_1 : | |
943 case Bytecodes::_dstore_2 : | |
944 case Bytecodes::_dstore_3 : | |
945 index = opcode - Bytecodes::_dstore_0; | |
946 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
947 no_control_flow = false; break; | |
948 case Bytecodes::_astore : | |
949 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
950 no_control_flow = false; break; | |
951 case Bytecodes::_astore_0 : | |
952 case Bytecodes::_astore_1 : | |
953 case Bytecodes::_astore_2 : | |
954 case Bytecodes::_astore_3 : | |
955 index = opcode - Bytecodes::_astore_0; | |
956 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
957 no_control_flow = false; break; | |
958 case Bytecodes::_iastore : | |
959 type = current_frame.pop_stack( | |
960 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
961 type2 = current_frame.pop_stack( | |
962 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
963 atype = current_frame.pop_stack( | |
964 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
965 if (!atype.is_int_array()) { | |
6605 | 966 verify_error(ErrorContext::bad_type(bci, |
967 current_frame.stack_top_ctx(), ref_ctx("[I", THREAD)), | |
968 bad_type_msg, "iastore"); | |
0 | 969 return; |
970 } | |
971 no_control_flow = false; break; | |
972 case Bytecodes::_bastore : | |
973 type = current_frame.pop_stack( | |
974 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
975 type2 = current_frame.pop_stack( | |
976 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
977 atype = current_frame.pop_stack( | |
978 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
979 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
6605 | 980 verify_error( |
981 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
982 bad_type_msg, "bastore"); | |
0 | 983 return; |
984 } | |
985 no_control_flow = false; break; | |
986 case Bytecodes::_castore : | |
987 current_frame.pop_stack( | |
988 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
989 current_frame.pop_stack( | |
990 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
991 atype = current_frame.pop_stack( | |
992 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
993 if (!atype.is_char_array()) { | |
6605 | 994 verify_error(ErrorContext::bad_type(bci, |
995 current_frame.stack_top_ctx(), ref_ctx("[C", THREAD)), | |
996 bad_type_msg, "castore"); | |
0 | 997 return; |
998 } | |
999 no_control_flow = false; break; | |
1000 case Bytecodes::_sastore : | |
1001 current_frame.pop_stack( | |
1002 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1003 current_frame.pop_stack( | |
1004 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1005 atype = current_frame.pop_stack( | |
1006 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1007 if (!atype.is_short_array()) { | |
6605 | 1008 verify_error(ErrorContext::bad_type(bci, |
1009 current_frame.stack_top_ctx(), ref_ctx("[S", THREAD)), | |
1010 bad_type_msg, "sastore"); | |
0 | 1011 return; |
1012 } | |
1013 no_control_flow = false; break; | |
1014 case Bytecodes::_lastore : | |
1015 current_frame.pop_stack_2( | |
1016 VerificationType::long2_type(), | |
1017 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1018 current_frame.pop_stack( | |
1019 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1020 atype = current_frame.pop_stack( | |
1021 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1022 if (!atype.is_long_array()) { | |
6605 | 1023 verify_error(ErrorContext::bad_type(bci, |
1024 current_frame.stack_top_ctx(), ref_ctx("[J", THREAD)), | |
1025 bad_type_msg, "lastore"); | |
0 | 1026 return; |
1027 } | |
1028 no_control_flow = false; break; | |
1029 case Bytecodes::_fastore : | |
1030 current_frame.pop_stack( | |
1031 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1032 current_frame.pop_stack | |
1033 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1034 atype = current_frame.pop_stack( | |
1035 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1036 if (!atype.is_float_array()) { | |
6605 | 1037 verify_error(ErrorContext::bad_type(bci, |
1038 current_frame.stack_top_ctx(), ref_ctx("[F", THREAD)), | |
1039 bad_type_msg, "fastore"); | |
0 | 1040 return; |
1041 } | |
1042 no_control_flow = false; break; | |
1043 case Bytecodes::_dastore : | |
1044 current_frame.pop_stack_2( | |
1045 VerificationType::double2_type(), | |
1046 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1047 current_frame.pop_stack( | |
1048 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1049 atype = current_frame.pop_stack( | |
1050 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1051 if (!atype.is_double_array()) { | |
6605 | 1052 verify_error(ErrorContext::bad_type(bci, |
1053 current_frame.stack_top_ctx(), ref_ctx("[D", THREAD)), | |
1054 bad_type_msg, "dastore"); | |
0 | 1055 return; |
1056 } | |
1057 no_control_flow = false; break; | |
1058 case Bytecodes::_aastore : | |
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|
1059 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1060 type2 = current_frame.pop_stack( |
1061 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1062 atype = current_frame.pop_stack( | |
1063 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1064 // more type-checking is done at runtime | |
1065 if (!atype.is_reference_array()) { | |
6605 | 1066 verify_error(ErrorContext::bad_type(bci, |
1067 current_frame.stack_top_ctx(), | |
1068 TypeOrigin::implicit(VerificationType::reference_check())), | |
1069 bad_type_msg, "aastore"); | |
0 | 1070 return; |
1071 } | |
1072 // 4938384: relaxed constraint in JVMS 3nd edition. | |
1073 no_control_flow = false; break; | |
1074 case Bytecodes::_pop : | |
1075 current_frame.pop_stack( | |
1076 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1077 no_control_flow = false; break; | |
1078 case Bytecodes::_pop2 : | |
1079 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1080 if (type.is_category1()) { | |
1081 current_frame.pop_stack( | |
1082 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1083 } else if (type.is_category2_2nd()) { | |
1084 current_frame.pop_stack( | |
1085 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1086 } else { | |
6605 | 1087 /* Unreachable? Would need a category2_1st on TOS |
1088 * which does not appear possible. */ | |
1089 verify_error( | |
1090 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1091 bad_type_msg, "pop2"); | |
0 | 1092 return; |
1093 } | |
1094 no_control_flow = false; break; | |
1095 case Bytecodes::_dup : | |
1096 type = current_frame.pop_stack( | |
1097 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1098 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1099 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1100 no_control_flow = false; break; | |
1101 case Bytecodes::_dup_x1 : | |
1102 type = current_frame.pop_stack( | |
1103 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1104 type2 = current_frame.pop_stack( | |
1105 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1106 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1107 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1108 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1109 no_control_flow = false; break; | |
1110 case Bytecodes::_dup_x2 : | |
1111 { | |
1112 VerificationType type3; | |
1113 type = current_frame.pop_stack( | |
1114 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1115 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1116 if (type2.is_category1()) { | |
1117 type3 = current_frame.pop_stack( | |
1118 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1119 } else if (type2.is_category2_2nd()) { | |
1120 type3 = current_frame.pop_stack( | |
1121 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1122 } else { | |
6605 | 1123 /* Unreachable? Would need a category2_1st at stack depth 2 with |
1124 * a category1 on TOS which does not appear possible. */ | |
1125 verify_error(ErrorContext::bad_type( | |
1126 bci, current_frame.stack_top_ctx()), bad_type_msg, "dup_x2"); | |
0 | 1127 return; |
1128 } | |
1129 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1130 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1131 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1132 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1133 no_control_flow = false; break; | |
1134 } | |
1135 case Bytecodes::_dup2 : | |
1136 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1137 if (type.is_category1()) { | |
1138 type2 = current_frame.pop_stack( | |
1139 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1140 } else if (type.is_category2_2nd()) { | |
1141 type2 = current_frame.pop_stack( | |
1142 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1143 } else { | |
6605 | 1144 /* Unreachable? Would need a category2_1st on TOS which does not |
1145 * appear possible. */ | |
1146 verify_error( | |
1147 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1148 bad_type_msg, "dup2"); | |
0 | 1149 return; |
1150 } | |
1151 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1152 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1153 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1154 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1155 no_control_flow = false; break; | |
1156 case Bytecodes::_dup2_x1 : | |
1157 { | |
1158 VerificationType type3; | |
1159 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1160 if (type.is_category1()) { | |
1161 type2 = current_frame.pop_stack( | |
1162 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
6605 | 1163 } else if (type.is_category2_2nd()) { |
1164 type2 = current_frame.pop_stack( | |
1165 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
0 | 1166 } else { |
6605 | 1167 /* Unreachable? Would need a category2_1st on TOS which does |
1168 * not appear possible. */ | |
1169 verify_error( | |
1170 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1171 bad_type_msg, "dup2_x1"); | |
0 | 1172 return; |
1173 } | |
1174 type3 = current_frame.pop_stack( | |
1175 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1176 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1177 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1178 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1179 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1180 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1181 no_control_flow = false; break; | |
1182 } | |
1183 case Bytecodes::_dup2_x2 : | |
1184 { | |
1185 VerificationType type3, type4; | |
1186 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1187 if (type.is_category1()) { | |
1188 type2 = current_frame.pop_stack( | |
1189 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1190 } else if (type.is_category2_2nd()) { | |
1191 type2 = current_frame.pop_stack( | |
1192 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1193 } else { | |
6605 | 1194 /* Unreachable? Would need a category2_1st on TOS which does |
1195 * not appear possible. */ | |
1196 verify_error( | |
1197 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1198 bad_type_msg, "dup2_x2"); | |
0 | 1199 return; |
1200 } | |
1201 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1202 if (type3.is_category1()) { | |
1203 type4 = current_frame.pop_stack( | |
1204 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1205 } else if (type3.is_category2_2nd()) { | |
1206 type4 = current_frame.pop_stack( | |
1207 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1208 } else { | |
6605 | 1209 /* Unreachable? Would need a category2_1st on TOS after popping |
1210 * a long/double or two category 1's, which does not | |
1211 * appear possible. */ | |
1212 verify_error( | |
1213 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1214 bad_type_msg, "dup2_x2"); | |
0 | 1215 return; |
1216 } | |
1217 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1218 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1219 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
1220 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1221 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1222 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1223 no_control_flow = false; break; | |
1224 } | |
1225 case Bytecodes::_swap : | |
1226 type = current_frame.pop_stack( | |
1227 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1228 type2 = current_frame.pop_stack( | |
1229 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1230 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1231 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1232 no_control_flow = false; break; | |
1233 case Bytecodes::_iadd : | |
1234 case Bytecodes::_isub : | |
1235 case Bytecodes::_imul : | |
1236 case Bytecodes::_idiv : | |
1237 case Bytecodes::_irem : | |
1238 case Bytecodes::_ishl : | |
1239 case Bytecodes::_ishr : | |
1240 case Bytecodes::_iushr : | |
1241 case Bytecodes::_ior : | |
1242 case Bytecodes::_ixor : | |
1243 case Bytecodes::_iand : | |
1244 current_frame.pop_stack( | |
1245 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1246 // fall through | |
1247 case Bytecodes::_ineg : | |
1248 current_frame.pop_stack( | |
1249 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1250 current_frame.push_stack( | |
1251 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1252 no_control_flow = false; break; | |
1253 case Bytecodes::_ladd : | |
1254 case Bytecodes::_lsub : | |
1255 case Bytecodes::_lmul : | |
1256 case Bytecodes::_ldiv : | |
1257 case Bytecodes::_lrem : | |
1258 case Bytecodes::_land : | |
1259 case Bytecodes::_lor : | |
1260 case Bytecodes::_lxor : | |
1261 current_frame.pop_stack_2( | |
1262 VerificationType::long2_type(), | |
1263 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1264 // fall through | |
1265 case Bytecodes::_lneg : | |
1266 current_frame.pop_stack_2( | |
1267 VerificationType::long2_type(), | |
1268 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1269 current_frame.push_stack_2( | |
1270 VerificationType::long_type(), | |
1271 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1272 no_control_flow = false; break; | |
1273 case Bytecodes::_lshl : | |
1274 case Bytecodes::_lshr : | |
1275 case Bytecodes::_lushr : | |
1276 current_frame.pop_stack( | |
1277 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1278 current_frame.pop_stack_2( | |
1279 VerificationType::long2_type(), | |
1280 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1281 current_frame.push_stack_2( | |
1282 VerificationType::long_type(), | |
1283 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1284 no_control_flow = false; break; | |
1285 case Bytecodes::_fadd : | |
1286 case Bytecodes::_fsub : | |
1287 case Bytecodes::_fmul : | |
1288 case Bytecodes::_fdiv : | |
1289 case Bytecodes::_frem : | |
1290 current_frame.pop_stack( | |
1291 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1292 // fall through | |
1293 case Bytecodes::_fneg : | |
1294 current_frame.pop_stack( | |
1295 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1296 current_frame.push_stack( | |
1297 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1298 no_control_flow = false; break; | |
1299 case Bytecodes::_dadd : | |
1300 case Bytecodes::_dsub : | |
1301 case Bytecodes::_dmul : | |
1302 case Bytecodes::_ddiv : | |
1303 case Bytecodes::_drem : | |
1304 current_frame.pop_stack_2( | |
1305 VerificationType::double2_type(), | |
1306 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1307 // fall through | |
1308 case Bytecodes::_dneg : | |
1309 current_frame.pop_stack_2( | |
1310 VerificationType::double2_type(), | |
1311 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1312 current_frame.push_stack_2( | |
1313 VerificationType::double_type(), | |
1314 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1315 no_control_flow = false; break; | |
1316 case Bytecodes::_iinc : | |
1317 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
1318 no_control_flow = false; break; | |
1319 case Bytecodes::_i2l : | |
1320 type = current_frame.pop_stack( | |
1321 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1322 current_frame.push_stack_2( | |
1323 VerificationType::long_type(), | |
1324 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1325 no_control_flow = false; break; | |
1326 case Bytecodes::_l2i : | |
1327 current_frame.pop_stack_2( | |
1328 VerificationType::long2_type(), | |
1329 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1330 current_frame.push_stack( | |
1331 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1332 no_control_flow = false; break; | |
1333 case Bytecodes::_i2f : | |
1334 current_frame.pop_stack( | |
1335 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1336 current_frame.push_stack( | |
1337 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1338 no_control_flow = false; break; | |
1339 case Bytecodes::_i2d : | |
1340 current_frame.pop_stack( | |
1341 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1342 current_frame.push_stack_2( | |
1343 VerificationType::double_type(), | |
1344 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1345 no_control_flow = false; break; | |
1346 case Bytecodes::_l2f : | |
1347 current_frame.pop_stack_2( | |
1348 VerificationType::long2_type(), | |
1349 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1350 current_frame.push_stack( | |
1351 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1352 no_control_flow = false; break; | |
1353 case Bytecodes::_l2d : | |
1354 current_frame.pop_stack_2( | |
1355 VerificationType::long2_type(), | |
1356 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1357 current_frame.push_stack_2( | |
1358 VerificationType::double_type(), | |
1359 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1360 no_control_flow = false; break; | |
1361 case Bytecodes::_f2i : | |
1362 current_frame.pop_stack( | |
1363 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1364 current_frame.push_stack( | |
1365 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1366 no_control_flow = false; break; | |
1367 case Bytecodes::_f2l : | |
1368 current_frame.pop_stack( | |
1369 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1370 current_frame.push_stack_2( | |
1371 VerificationType::long_type(), | |
1372 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1373 no_control_flow = false; break; | |
1374 case Bytecodes::_f2d : | |
1375 current_frame.pop_stack( | |
1376 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1377 current_frame.push_stack_2( | |
1378 VerificationType::double_type(), | |
1379 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1380 no_control_flow = false; break; | |
1381 case Bytecodes::_d2i : | |
1382 current_frame.pop_stack_2( | |
1383 VerificationType::double2_type(), | |
1384 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1385 current_frame.push_stack( | |
1386 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1387 no_control_flow = false; break; | |
1388 case Bytecodes::_d2l : | |
1389 current_frame.pop_stack_2( | |
1390 VerificationType::double2_type(), | |
1391 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1392 current_frame.push_stack_2( | |
1393 VerificationType::long_type(), | |
1394 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1395 no_control_flow = false; break; | |
1396 case Bytecodes::_d2f : | |
1397 current_frame.pop_stack_2( | |
1398 VerificationType::double2_type(), | |
1399 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1400 current_frame.push_stack( | |
1401 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1402 no_control_flow = false; break; | |
1403 case Bytecodes::_i2b : | |
1404 case Bytecodes::_i2c : | |
1405 case Bytecodes::_i2s : | |
1406 current_frame.pop_stack( | |
1407 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1408 current_frame.push_stack( | |
1409 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1410 no_control_flow = false; break; | |
1411 case Bytecodes::_lcmp : | |
1412 current_frame.pop_stack_2( | |
1413 VerificationType::long2_type(), | |
1414 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1415 current_frame.pop_stack_2( | |
1416 VerificationType::long2_type(), | |
1417 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1418 current_frame.push_stack( | |
1419 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1420 no_control_flow = false; break; | |
1421 case Bytecodes::_fcmpl : | |
1422 case Bytecodes::_fcmpg : | |
1423 current_frame.pop_stack( | |
1424 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1425 current_frame.pop_stack( | |
1426 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1427 current_frame.push_stack( | |
1428 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1429 no_control_flow = false; break; | |
1430 case Bytecodes::_dcmpl : | |
1431 case Bytecodes::_dcmpg : | |
1432 current_frame.pop_stack_2( | |
1433 VerificationType::double2_type(), | |
1434 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1435 current_frame.pop_stack_2( | |
1436 VerificationType::double2_type(), | |
1437 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1438 current_frame.push_stack( | |
1439 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1440 no_control_flow = false; break; | |
1441 case Bytecodes::_if_icmpeq: | |
1442 case Bytecodes::_if_icmpne: | |
1443 case Bytecodes::_if_icmplt: | |
1444 case Bytecodes::_if_icmpge: | |
1445 case Bytecodes::_if_icmpgt: | |
1446 case Bytecodes::_if_icmple: | |
1447 current_frame.pop_stack( | |
1448 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1449 // fall through | |
1450 case Bytecodes::_ifeq: | |
1451 case Bytecodes::_ifne: | |
1452 case Bytecodes::_iflt: | |
1453 case Bytecodes::_ifge: | |
1454 case Bytecodes::_ifgt: | |
1455 case Bytecodes::_ifle: | |
1456 current_frame.pop_stack( | |
1457 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1458 target = bcs.dest(); | |
1459 stackmap_table.check_jump_target( | |
1460 ¤t_frame, target, CHECK_VERIFY(this)); | |
1461 no_control_flow = false; break; | |
1462 case Bytecodes::_if_acmpeq : | |
1463 case Bytecodes::_if_acmpne : | |
1464 current_frame.pop_stack( | |
1465 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1466 // fall through | |
1467 case Bytecodes::_ifnull : | |
1468 case Bytecodes::_ifnonnull : | |
1469 current_frame.pop_stack( | |
1470 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1471 target = bcs.dest(); | |
1472 stackmap_table.check_jump_target | |
1473 (¤t_frame, target, CHECK_VERIFY(this)); | |
1474 no_control_flow = false; break; | |
1475 case Bytecodes::_goto : | |
1476 target = bcs.dest(); | |
1477 stackmap_table.check_jump_target( | |
1478 ¤t_frame, target, CHECK_VERIFY(this)); | |
1479 no_control_flow = true; break; | |
1480 case Bytecodes::_goto_w : | |
1481 target = bcs.dest_w(); | |
1482 stackmap_table.check_jump_target( | |
1483 ¤t_frame, target, CHECK_VERIFY(this)); | |
1484 no_control_flow = true; break; | |
1485 case Bytecodes::_tableswitch : | |
1486 case Bytecodes::_lookupswitch : | |
1487 verify_switch( | |
1488 &bcs, code_length, code_data, ¤t_frame, | |
1489 &stackmap_table, CHECK_VERIFY(this)); | |
1490 no_control_flow = true; break; | |
1491 case Bytecodes::_ireturn : | |
1492 type = current_frame.pop_stack( | |
1493 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
6605 | 1494 verify_return_value(return_type, type, bci, |
1495 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1496 no_control_flow = true; break; |
1497 case Bytecodes::_lreturn : | |
1498 type2 = current_frame.pop_stack( | |
1499 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1500 type = current_frame.pop_stack( | |
1501 VerificationType::long_type(), CHECK_VERIFY(this)); | |
6605 | 1502 verify_return_value(return_type, type, bci, |
1503 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1504 no_control_flow = true; break; |
1505 case Bytecodes::_freturn : | |
1506 type = current_frame.pop_stack( | |
1507 VerificationType::float_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::_dreturn : | |
1512 type2 = current_frame.pop_stack( | |
1513 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1514 type = current_frame.pop_stack( | |
1515 VerificationType::double_type(), CHECK_VERIFY(this)); | |
6605 | 1516 verify_return_value(return_type, type, bci, |
1517 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1518 no_control_flow = true; break; |
1519 case Bytecodes::_areturn : | |
1520 type = current_frame.pop_stack( | |
1521 VerificationType::reference_check(), 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::_return : | |
1526 if (return_type != VerificationType::bogus_type()) { | |
6605 | 1527 verify_error(ErrorContext::bad_code(bci), |
1528 "Method expects a return value"); | |
0 | 1529 return; |
1530 } | |
1531 // Make sure "this" has been initialized if current method is an | |
1532 // <init> | |
1533 if (_method->name() == vmSymbols::object_initializer_name() && | |
1534 current_frame.flag_this_uninit()) { | |
6605 | 1535 verify_error(ErrorContext::bad_code(bci), |
1536 "Constructor must call super() or this() " | |
1537 "before return"); | |
0 | 1538 return; |
1539 } | |
1540 no_control_flow = true; break; | |
1541 case Bytecodes::_getstatic : | |
1542 case Bytecodes::_putstatic : | |
1543 case Bytecodes::_getfield : | |
1544 case Bytecodes::_putfield : | |
1545 verify_field_instructions( | |
1546 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1547 no_control_flow = false; break; | |
1548 case Bytecodes::_invokevirtual : | |
1549 case Bytecodes::_invokespecial : | |
1550 case Bytecodes::_invokestatic : | |
1551 verify_invoke_instructions( | |
1552 &bcs, code_length, ¤t_frame, | |
1553 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1554 no_control_flow = false; break; | |
1555 case Bytecodes::_invokeinterface : | |
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1556 case Bytecodes::_invokedynamic : |
0 | 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::_new : | |
1562 { | |
1565 | 1563 index = bcs.get_index_u2(); |
6605 | 1564 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
0 | 1565 VerificationType new_class_type = |
1566 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1567 if (!new_class_type.is_object()) { | |
6605 | 1568 verify_error(ErrorContext::bad_type(bci, |
1569 TypeOrigin::cp(index, new_class_type)), | |
1570 "Illegal new instruction"); | |
0 | 1571 return; |
1572 } | |
1573 type = VerificationType::uninitialized_type(bci); | |
1574 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1575 no_control_flow = false; break; | |
1576 } | |
1577 case Bytecodes::_newarray : | |
1578 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1579 current_frame.pop_stack( | |
1580 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1581 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1582 no_control_flow = false; break; | |
1583 case Bytecodes::_anewarray : | |
1584 verify_anewarray( | |
6605 | 1585 bci, bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1586 no_control_flow = false; break; |
1587 case Bytecodes::_arraylength : | |
1588 type = current_frame.pop_stack( | |
1589 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1590 if (!(type.is_null() || type.is_array())) { |
6605 | 1591 verify_error(ErrorContext::bad_type( |
1592 bci, current_frame.stack_top_ctx()), | |
1593 bad_type_msg, "arraylength"); | |
0 | 1594 } |
1595 current_frame.push_stack( | |
1596 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1597 no_control_flow = false; break; | |
1598 case Bytecodes::_checkcast : | |
1599 { | |
1565 | 1600 index = bcs.get_index_u2(); |
6605 | 1601 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
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1602 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1603 VerificationType klass_type = cp_index_to_type( |
1604 index, cp, CHECK_VERIFY(this)); | |
1605 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1606 no_control_flow = false; break; | |
1607 } | |
1608 case Bytecodes::_instanceof : { | |
1565 | 1609 index = bcs.get_index_u2(); |
6605 | 1610 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
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1611 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1612 current_frame.push_stack( |
1613 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1614 no_control_flow = false; break; | |
1615 } | |
1616 case Bytecodes::_monitorenter : | |
1617 case Bytecodes::_monitorexit : | |
1618 current_frame.pop_stack( | |
1619 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1620 no_control_flow = false; break; | |
1621 case Bytecodes::_multianewarray : | |
1622 { | |
1565 | 1623 index = bcs.get_index_u2(); |
0 | 1624 u2 dim = *(bcs.bcp()+3); |
6605 | 1625 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
0 | 1626 VerificationType new_array_type = |
1627 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1628 if (!new_array_type.is_array()) { | |
6605 | 1629 verify_error(ErrorContext::bad_type(bci, |
1630 TypeOrigin::cp(index, new_array_type)), | |
1631 "Illegal constant pool index in multianewarray instruction"); | |
0 | 1632 return; |
1633 } | |
1634 if (dim < 1 || new_array_type.dimensions() < dim) { | |
6605 | 1635 verify_error(ErrorContext::bad_code(bci), |
1636 "Illegal dimension in multianewarray instruction: %d", dim); | |
0 | 1637 return; |
1638 } | |
1639 for (int i = 0; i < dim; i++) { | |
1640 current_frame.pop_stack( | |
1641 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1642 } | |
1643 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1644 no_control_flow = false; break; | |
1645 } | |
1646 case Bytecodes::_athrow : | |
1647 type = VerificationType::reference_type( | |
1648 vmSymbols::java_lang_Throwable()); | |
1649 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1650 no_control_flow = true; break; | |
1651 default: | |
1652 // We only need to check the valid bytecodes in class file. | |
1653 // And jsr and ret are not in the new class file format in JDK1.5. | |
6605 | 1654 verify_error(ErrorContext::bad_code(bci), |
1655 "Bad instruction: %02x", opcode); | |
0 | 1656 no_control_flow = false; |
1657 return; | |
1658 } // end switch | |
1659 } // end Merge with the next instruction | |
1660 | |
1661 // Look for possible jump target in exception handlers and see if it | |
1662 // matches current_frame | |
1663 if (bci >= ex_min && bci < ex_max) { | |
1664 verify_exception_handler_targets( | |
1665 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1666 } | |
1667 } // end while | |
1668 | |
1669 // Make sure that control flow does not fall through end of the method | |
1670 if (!no_control_flow) { | |
6605 | 1671 verify_error(ErrorContext::bad_code(code_length), |
1672 "Control flow falls through code end"); | |
0 | 1673 return; |
1674 } | |
1675 } | |
1676 | |
1677 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1678 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1679 memset(code_data, 0, sizeof(char) * code_length); | |
1680 RawBytecodeStream bcs(m); | |
1681 | |
1682 while (!bcs.is_last_bytecode()) { | |
1683 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1684 int bci = bcs.bci(); | |
1565 | 1685 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1686 code_data[bci] = NEW_OFFSET; |
1687 } else { | |
1688 code_data[bci] = BYTECODE_OFFSET; | |
1689 } | |
1690 } else { | |
6605 | 1691 verify_error(ErrorContext::bad_code(bcs.bci()), "Bad instruction"); |
0 | 1692 return NULL; |
1693 } | |
1694 } | |
1695 | |
1696 return code_data; | |
1697 } | |
1698 | |
1699 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
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1700 ExceptionTable exhandlers(_method()); |
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1701 int exlength = exhandlers.length(); |
0 | 1702 constantPoolHandle cp (THREAD, _method->constants()); |
1703 | |
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1704 for(int i = 0; i < exlength; i++) { |
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1705 //reacquire the table in case a GC happened |
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1706 ExceptionTable exhandlers(_method()); |
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1707 u2 start_pc = exhandlers.start_pc(i); |
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1708 u2 end_pc = exhandlers.end_pc(i); |
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1709 u2 handler_pc = exhandlers.handler_pc(i); |
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1710 if (start_pc >= code_length || code_data[start_pc] == 0) { |
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1711 class_format_error("Illegal exception table start_pc %d", start_pc); |
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1712 return; |
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|
1713 } |
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1714 if (end_pc != code_length) { // special case: end_pc == code_length |
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1715 if (end_pc > code_length || code_data[end_pc] == 0) { |
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1716 class_format_error("Illegal exception table end_pc %d", end_pc); |
0 | 1717 return; |
1718 } | |
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1719 } |
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1720 if (handler_pc >= code_length || code_data[handler_pc] == 0) { |
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1721 class_format_error("Illegal exception table handler_pc %d", handler_pc); |
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1722 return; |
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|
1723 } |
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1724 int catch_type_index = exhandlers.catch_type_index(i); |
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1725 if (catch_type_index != 0) { |
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1726 VerificationType catch_type = cp_index_to_type( |
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1727 catch_type_index, cp, CHECK_VERIFY(this)); |
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1728 VerificationType throwable = |
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1729 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
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1730 bool is_subclass = throwable.is_assignable_from( |
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1731 catch_type, this, CHECK_VERIFY(this)); |
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1732 if (!is_subclass) { |
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1733 // 4286534: should throw VerifyError according to recent spec change |
6605 | 1734 verify_error(ErrorContext::bad_type(handler_pc, |
1735 TypeOrigin::cp(catch_type_index, catch_type), | |
1736 TypeOrigin::implicit(throwable)), | |
1737 "Catch type is not a subclass " | |
1738 "of Throwable in exception handler %d", handler_pc); | |
0 | 1739 return; |
1740 } | |
1741 } | |
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1742 if (start_pc < min) min = start_pc; |
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1743 if (end_pc > max) max = end_pc; |
0 | 1744 } |
1745 } | |
1746 | |
1747 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1748 int localvariable_table_length = _method()->localvariable_table_length(); | |
1749 if (localvariable_table_length > 0) { | |
1750 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1751 for (int i = 0; i < localvariable_table_length; i++) { | |
1752 u2 start_bci = table[i].start_bci; | |
1753 u2 length = table[i].length; | |
1754 | |
1755 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1756 class_format_error( | |
1757 "Illegal local variable table start_pc %d", start_bci); | |
1758 return; | |
1759 } | |
1760 u4 end_bci = (u4)(start_bci + length); | |
1761 if (end_bci != code_length) { | |
1762 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1763 class_format_error( "Illegal local variable table length %d", length); | |
1764 return; | |
1765 } | |
1766 } | |
1767 } | |
1768 } | |
1769 } | |
1770 | |
1771 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1772 StackMapFrame* current_frame, | |
1773 StackMapTable* stackmap_table, | |
1774 bool no_control_flow, TRAPS) { | |
1775 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1776 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1777 if (no_control_flow && this_offset > bci) { | |
6605 | 1778 verify_error(ErrorContext::missing_stackmap(bci), |
1779 "Expecting a stack map frame"); | |
0 | 1780 return 0; |
1781 } | |
1782 if (this_offset == bci) { | |
6605 | 1783 ErrorContext ctx; |
0 | 1784 // See if current stack map can be assigned to the frame in table. |
1785 // current_frame is the stackmap frame got from the last instruction. | |
1786 // If matched, current_frame will be updated by this method. | |
6605 | 1787 bool matches = stackmap_table->match_stackmap( |
0 | 1788 current_frame, this_offset, stackmap_index, |
6605 | 1789 !no_control_flow, true, &ctx, CHECK_VERIFY_(this, 0)); |
1790 if (!matches) { | |
0 | 1791 // report type error |
6605 | 1792 verify_error(ctx, "Instruction type does not match stack map"); |
0 | 1793 return 0; |
1794 } | |
1795 stackmap_index++; | |
1796 } else if (this_offset < bci) { | |
1797 // current_offset should have met this_offset. | |
1798 class_format_error("Bad stack map offset %d", this_offset); | |
1799 return 0; | |
1800 } | |
1801 } else if (no_control_flow) { | |
6605 | 1802 verify_error(ErrorContext::bad_code(bci), "Expecting a stack map frame"); |
0 | 1803 return 0; |
1804 } | |
1805 return stackmap_index; | |
1806 } | |
1807 | |
1808 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1809 StackMapTable* stackmap_table, TRAPS) { | |
1810 constantPoolHandle cp (THREAD, _method->constants()); | |
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1811 ExceptionTable exhandlers(_method()); |
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1812 int exlength = exhandlers.length(); |
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1813 for(int i = 0; i < exlength; i++) { |
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1814 //reacquire the table in case a GC happened |
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1815 ExceptionTable exhandlers(_method()); |
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1816 u2 start_pc = exhandlers.start_pc(i); |
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1817 u2 end_pc = exhandlers.end_pc(i); |
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1818 u2 handler_pc = exhandlers.handler_pc(i); |
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1819 int catch_type_index = exhandlers.catch_type_index(i); |
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1820 if(bci >= start_pc && bci < end_pc) { |
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1821 u1 flags = current_frame->flags(); |
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1822 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } |
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1823 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); |
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1824 if (catch_type_index != 0) { |
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1825 // We know that this index refers to a subclass of Throwable |
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1826 VerificationType catch_type = cp_index_to_type( |
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1827 catch_type_index, cp, CHECK_VERIFY(this)); |
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1828 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); |
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1829 } else { |
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1830 VerificationType throwable = |
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1831 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
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1832 new_frame->push_stack(throwable, CHECK_VERIFY(this)); |
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1833 } |
6605 | 1834 ErrorContext ctx; |
1835 bool matches = stackmap_table->match_stackmap( | |
1836 new_frame, handler_pc, true, false, &ctx, CHECK_VERIFY(this)); | |
1837 if (!matches) { | |
1838 verify_error(ctx, "Stack map does not match the one at " | |
1839 "exception handler %d", handler_pc); | |
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1840 return; |
0 | 1841 } |
1842 } | |
1843 } | |
1844 } | |
1845 | |
6605 | 1846 void ClassVerifier::verify_cp_index( |
1847 u2 bci, constantPoolHandle cp, int index, TRAPS) { | |
0 | 1848 int nconstants = cp->length(); |
1849 if ((index <= 0) || (index >= nconstants)) { | |
6605 | 1850 verify_error(ErrorContext::bad_cp_index(bci, index), |
1851 "Illegal constant pool index %d in class %s", | |
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1852 index, InstanceKlass::cast(cp->pool_holder())->external_name()); |
0 | 1853 return; |
1854 } | |
1855 } | |
1856 | |
1857 void ClassVerifier::verify_cp_type( | |
6605 | 1858 u2 bci, int index, constantPoolHandle cp, unsigned int types, TRAPS) { |
0 | 1859 |
1860 // In some situations, bytecode rewriting may occur while we're verifying. | |
1861 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1862 // instead. Be sure we don't pick up such indices by accident. |
1863 // We must check was_recursively_verified() before we get here. | |
1864 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1865 |
6605 | 1866 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); |
0 | 1867 unsigned int tag = cp->tag_at(index).value(); |
1868 if ((types & (1 << tag)) == 0) { | |
6605 | 1869 verify_error(ErrorContext::bad_cp_index(bci, index), |
0 | 1870 "Illegal type at constant pool entry %d in class %s", |
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1871 index, InstanceKlass::cast(cp->pool_holder())->external_name()); |
0 | 1872 return; |
1873 } | |
1874 } | |
1875 | |
1876 void ClassVerifier::verify_cp_class_type( | |
6605 | 1877 u2 bci, int index, constantPoolHandle cp, TRAPS) { |
1878 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); | |
0 | 1879 constantTag tag = cp->tag_at(index); |
1880 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
6605 | 1881 verify_error(ErrorContext::bad_cp_index(bci, index), |
1882 "Illegal type at constant pool entry %d in class %s", | |
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1883 index, InstanceKlass::cast(cp->pool_holder())->external_name()); |
0 | 1884 return; |
1885 } | |
1886 } | |
1887 | |
6605 | 1888 void ClassVerifier::verify_error(ErrorContext ctx, const char* msg, ...) { |
1889 stringStream ss; | |
0 | 1890 |
6605 | 1891 ctx.reset_frames(); |
0 | 1892 _exception_type = vmSymbols::java_lang_VerifyError(); |
6605 | 1893 _error_context = ctx; |
0 | 1894 va_list va; |
6605 | 1895 va_start(va, msg); |
1896 ss.vprint(msg, va); | |
0 | 1897 va_end(va); |
6605 | 1898 _message = ss.as_string(); |
1899 #ifdef ASSERT | |
1900 ResourceMark rm; | |
1901 const char* exception_name = _exception_type->as_C_string(); | |
1902 Exceptions::debug_check_abort(exception_name, NULL); | |
1903 #endif // ndef ASSERT | |
0 | 1904 } |
1905 | |
1906 void ClassVerifier::class_format_error(const char* msg, ...) { | |
6605 | 1907 stringStream ss; |
0 | 1908 _exception_type = vmSymbols::java_lang_ClassFormatError(); |
1909 va_list va; | |
1910 va_start(va, msg); | |
6605 | 1911 ss.vprint(msg, va); |
0 | 1912 va_end(va); |
6605 | 1913 if (!_method.is_null()) { |
1914 ss.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1915 } | |
1916 _message = ss.as_string(); | |
0 | 1917 } |
1918 | |
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1919 Klass* ClassVerifier::load_class(Symbol* name, TRAPS) { |
0 | 1920 // Get current loader and protection domain first. |
1921 oop loader = current_class()->class_loader(); | |
1922 oop protection_domain = current_class()->protection_domain(); | |
1923 | |
1924 return SystemDictionary::resolve_or_fail( | |
1925 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1926 true, CHECK_NULL); | |
1927 } | |
1928 | |
1929 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
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1930 Klass* target_class, |
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1931 Symbol* field_name, |
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1932 Symbol* field_sig, |
0 | 1933 bool is_method) { |
1934 No_Safepoint_Verifier nosafepoint; | |
1935 | |
1936 // If target class isn't a super class of this class, we don't worry about this case | |
1937 if (!this_class->is_subclass_of(target_class)) { | |
1938 return false; | |
1939 } | |
1940 // Check if the specified method or field is protected | |
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1941 InstanceKlass* target_instance = InstanceKlass::cast(target_class); |
0 | 1942 fieldDescriptor fd; |
1943 if (is_method) { | |
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1944 Method* m = target_instance->uncached_lookup_method(field_name, field_sig); |
0 | 1945 if (m != NULL && m->is_protected()) { |
1946 if (!this_class->is_same_class_package(m->method_holder())) { | |
1947 return true; | |
1948 } | |
1949 } | |
1950 } else { | |
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1951 Klass* member_klass = target_instance->find_field(field_name, field_sig, &fd); |
6605 | 1952 if (member_klass != NULL && fd.is_protected()) { |
0 | 1953 if (!this_class->is_same_class_package(member_klass)) { |
1954 return true; | |
1955 } | |
1956 } | |
1957 } | |
1958 return false; | |
1959 } | |
1960 | |
1961 void ClassVerifier::verify_ldc( | |
6605 | 1962 int opcode, u2 index, StackMapFrame* current_frame, |
1963 constantPoolHandle cp, u2 bci, TRAPS) { | |
1964 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); | |
0 | 1965 constantTag tag = cp->tag_at(index); |
1966 unsigned int types; | |
1967 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
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1968 if (!tag.is_unresolved_klass()) { |
0 | 1969 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) |
1602 | 1970 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1971 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1972 // Note: The class file parser already verified the legality of | |
1973 // MethodHandle and MethodType constants. | |
6605 | 1974 verify_cp_type(bci, index, cp, types, CHECK_VERIFY(this)); |
0 | 1975 } |
1976 } else { | |
1977 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1978 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
6605 | 1979 verify_cp_type(bci, index, cp, types, CHECK_VERIFY(this)); |
0 | 1980 } |
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1981 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1982 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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1983 } else if (tag.is_string()) { |
0 | 1984 current_frame->push_stack( |
1985 VerificationType::reference_type( | |
1986 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1987 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1988 current_frame->push_stack( | |
1989 VerificationType::reference_type( | |
1990 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1991 } else if (tag.is_int()) { | |
1992 current_frame->push_stack( | |
1993 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1994 } else if (tag.is_float()) { | |
1995 current_frame->push_stack( | |
1996 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1997 } else if (tag.is_double()) { | |
1998 current_frame->push_stack_2( | |
1999 VerificationType::double_type(), | |
2000 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2001 } else if (tag.is_long()) { | |
2002 current_frame->push_stack_2( | |
2003 VerificationType::long_type(), | |
2004 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 2005 } else if (tag.is_method_handle()) { |
2006 current_frame->push_stack( | |
2007 VerificationType::reference_type( | |
2460 | 2008 vmSymbols::java_lang_invoke_MethodHandle()), CHECK_VERIFY(this)); |
1602 | 2009 } else if (tag.is_method_type()) { |
2010 current_frame->push_stack( | |
2011 VerificationType::reference_type( | |
2460 | 2012 vmSymbols::java_lang_invoke_MethodType()), CHECK_VERIFY(this)); |
0 | 2013 } else { |
6605 | 2014 /* Unreachable? verify_cp_type has already validated the cp type. */ |
2015 verify_error( | |
2016 ErrorContext::bad_cp_index(bci, index), "Invalid index in ldc"); | |
0 | 2017 return; |
2018 } | |
2019 } | |
2020 | |
2021 void ClassVerifier::verify_switch( | |
2022 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
2023 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
2024 int bci = bcs->bci(); | |
2025 address bcp = bcs->bcp(); | |
2026 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
2027 | |
2028 // 4639449 & 4647081: padding bytes must be 0 | |
2029 u2 padding_offset = 1; | |
2030 while ((bcp + padding_offset) < aligned_bcp) { | |
2031 if(*(bcp + padding_offset) != 0) { | |
6605 | 2032 verify_error(ErrorContext::bad_code(bci), |
2033 "Nonzero padding byte in lookswitch or tableswitch"); | |
0 | 2034 return; |
2035 } | |
2036 padding_offset++; | |
2037 } | |
2038 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
2039 int keys, delta; | |
2040 current_frame->pop_stack( | |
2041 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 2042 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 2043 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
2044 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
2045 if (low > high) { | |
6605 | 2046 verify_error(ErrorContext::bad_code(bci), |
2047 "low must be less than or equal to high in tableswitch"); | |
0 | 2048 return; |
2049 } | |
2050 keys = high - low + 1; | |
2051 if (keys < 0) { | |
6605 | 2052 verify_error(ErrorContext::bad_code(bci), "too many keys in tableswitch"); |
0 | 2053 return; |
2054 } | |
2055 delta = 1; | |
2056 } else { | |
2057 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
2058 if (keys < 0) { | |
6605 | 2059 verify_error(ErrorContext::bad_code(bci), |
2060 "number of keys in lookupswitch less than 0"); | |
0 | 2061 return; |
2062 } | |
2063 delta = 2; | |
2064 // Make sure that the lookupswitch items are sorted | |
2065 for (int i = 0; i < (keys - 1); i++) { | |
2066 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
2067 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
2068 if (this_key >= next_key) { | |
6605 | 2069 verify_error(ErrorContext::bad_code(bci), |
2070 "Bad lookupswitch instruction"); | |
0 | 2071 return; |
2072 } | |
2073 } | |
2074 } | |
2075 int target = bci + default_offset; | |
2076 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
2077 for (int i = 0; i < keys; i++) { | |
6118 | 2078 // Because check_jump_target() may safepoint, the bytecode could have |
2079 // moved, which means 'aligned_bcp' is no good and needs to be recalculated. | |
2080 aligned_bcp = (address)round_to((intptr_t)(bcs->bcp() + 1), jintSize); | |
0 | 2081 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); |
2082 stackmap_table->check_jump_target( | |
2083 current_frame, target, CHECK_VERIFY(this)); | |
2084 } | |
6118 | 2085 NOT_PRODUCT(aligned_bcp = NULL); // no longer valid at this point |
0 | 2086 } |
2087 | |
2088 bool ClassVerifier::name_in_supers( | |
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2089 Symbol* ref_name, instanceKlassHandle current) { |
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2090 Klass* super = current->super(); |
0 | 2091 while (super != NULL) { |
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2092 if (super->name() == ref_name) { |
0 | 2093 return true; |
2094 } | |
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2095 super = super->super(); |
0 | 2096 } |
2097 return false; | |
2098 } | |
2099 | |
2100 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
2101 StackMapFrame* current_frame, | |
2102 constantPoolHandle cp, | |
2103 TRAPS) { | |
1565 | 2104 u2 index = bcs->get_index_u2(); |
6605 | 2105 verify_cp_type(bcs->bci(), index, cp, |
2106 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); | |
0 | 2107 |
2108 // Get field name and signature | |
2177
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2109 Symbol* field_name = cp->name_ref_at(index); |
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diff
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2110 Symbol* field_sig = cp->signature_ref_at(index); |
0 | 2111 |
2112 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
2113 class_format_error( | |
2114 "Invalid signature for field in class %s referenced " | |
2115 "from constant pool index %d", _klass->external_name(), index); | |
2116 return; | |
2117 } | |
2118 | |
2119 // Get referenced class type | |
2120 VerificationType ref_class_type = cp_ref_index_to_type( | |
2121 index, cp, CHECK_VERIFY(this)); | |
2122 if (!ref_class_type.is_object()) { | |
6605 | 2123 /* Unreachable? Class file parser verifies Fieldref contents */ |
2124 verify_error(ErrorContext::bad_type(bcs->bci(), | |
2125 TypeOrigin::cp(index, ref_class_type)), | |
2126 "Expecting reference to class in class %s at constant pool index %d", | |
2127 _klass->external_name(), index); | |
0 | 2128 return; |
2129 } | |
2130 VerificationType target_class_type = ref_class_type; | |
2131 | |
2132 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
2133 "buffer type must match VerificationType size"); | |
2134 uintptr_t field_type_buffer[2]; | |
2135 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
2136 // If we make a VerificationType[2] array directly, the compiler calls | |
2137 // to the c-runtime library to do the allocation instead of just | |
2138 // stack allocating it. Plus it would run constructors. This shows up | |
2139 // in performance profiles. | |
2140 | |
2141 SignatureStream sig_stream(field_sig, false); | |
2142 VerificationType stack_object_type; | |
2143 int n = change_sig_to_verificationType( | |
2144 &sig_stream, field_type, CHECK_VERIFY(this)); | |
2145 u2 bci = bcs->bci(); | |
2146 bool is_assignable; | |
1565 | 2147 switch (bcs->raw_code()) { |
0 | 2148 case Bytecodes::_getstatic: { |
2149 for (int i = 0; i < n; i++) { | |
2150 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
2151 } | |
2152 break; | |
2153 } | |
2154 case Bytecodes::_putstatic: { | |
2155 for (int i = n - 1; i >= 0; i--) { | |
2156 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
2157 } | |
2158 break; | |
2159 } | |
2160 case Bytecodes::_getfield: { | |
2161 stack_object_type = current_frame->pop_stack( | |
2162 target_class_type, CHECK_VERIFY(this)); | |
2163 for (int i = 0; i < n; i++) { | |
2164 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
2165 } | |
2166 goto check_protected; | |
2167 } | |
2168 case Bytecodes::_putfield: { | |
2169 for (int i = n - 1; i >= 0; i--) { | |
2170 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
2171 } | |
2172 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
2173 | |
2174 // The JVMS 2nd edition allows field initialization before the superclass | |
2175 // initializer, if the field is defined within the current class. | |
2176 fieldDescriptor fd; | |
2177 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
2178 target_class_type.equals(current_type()) && | |
2177
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2179 _klass->find_local_field(field_name, field_sig, &fd)) { |
0 | 2180 stack_object_type = current_type(); |
2181 } | |
2182 is_assignable = target_class_type.is_assignable_from( | |
2177
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2183 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2184 if (!is_assignable) { |
6605 | 2185 verify_error(ErrorContext::bad_type(bci, |
2186 current_frame->stack_top_ctx(), | |
2187 TypeOrigin::cp(index, target_class_type)), | |
2188 "Bad type on operand stack in putfield"); | |
0 | 2189 return; |
2190 } | |
2191 } | |
2192 check_protected: { | |
2193 if (_this_type == stack_object_type) | |
2194 break; // stack_object_type must be assignable to _current_class_type | |
2177
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2195 Symbol* ref_class_name = |
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2196 cp->klass_name_at(cp->klass_ref_index_at(index)); |
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2197 if (!name_in_supers(ref_class_name, current_class())) |
0 | 2198 // stack_object_type must be assignable to _current_class_type since: |
2199 // 1. stack_object_type must be assignable to ref_class. | |
2200 // 2. ref_class must be _current_class or a subclass of it. It can't | |
2201 // be a superclass of it. See revised JVMS 5.4.4. | |
2202 break; | |
2203 | |
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2204 Klass* ref_class_oop = load_class(ref_class_name, CHECK); |
2177
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2205 if (is_protected_access(current_class(), ref_class_oop, field_name, |
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2206 field_sig, false)) { |
0 | 2207 // It's protected access, check if stack object is assignable to |
2208 // current class. | |
2209 is_assignable = current_type().is_assignable_from( | |
2177
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2210 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2211 if (!is_assignable) { |
6605 | 2212 verify_error(ErrorContext::bad_type(bci, |
2213 current_frame->stack_top_ctx(), | |
2214 TypeOrigin::implicit(current_type())), | |
2215 "Bad access to protected data in getfield"); | |
0 | 2216 return; |
2217 } | |
2218 } | |
2219 break; | |
2220 } | |
2221 default: ShouldNotReachHere(); | |
2222 } | |
2223 } | |
2224 | |
2225 void ClassVerifier::verify_invoke_init( | |
6605 | 2226 RawBytecodeStream* bcs, u2 ref_class_index, VerificationType ref_class_type, |
0 | 2227 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, |
2228 constantPoolHandle cp, TRAPS) { | |
2229 u2 bci = bcs->bci(); | |
2230 VerificationType type = current_frame->pop_stack( | |
2231 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2232 if (type == VerificationType::uninitialized_this_type()) { | |
6155 | 2233 // The method must be an <init> method of this class or its superclass |
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2234 Klass* superk = current_class()->super(); |
1677 | 2235 if (ref_class_type.name() != current_class()->name() && |
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2236 ref_class_type.name() != superk->name()) { |
6605 | 2237 verify_error(ErrorContext::bad_type(bci, |
2238 TypeOrigin::implicit(ref_class_type), | |
2239 TypeOrigin::implicit(current_type())), | |
2240 "Bad <init> method call"); | |
0 | 2241 return; |
2242 } | |
2243 current_frame->initialize_object(type, current_type()); | |
2244 *this_uninit = true; | |
2245 } else if (type.is_uninitialized()) { | |
2246 u2 new_offset = type.bci(); | |
2247 address new_bcp = bcs->bcp() - bci + new_offset; | |
2248 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
6605 | 2249 /* Unreachable? Stack map parsing ensures valid type and new |
2250 * instructions have a valid BCI. */ | |
2251 verify_error(ErrorContext::bad_code(new_offset), | |
2252 "Expecting new instruction"); | |
0 | 2253 return; |
2254 } | |
2255 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
6605 | 2256 verify_cp_class_type(bci, new_class_index, cp, CHECK_VERIFY(this)); |
0 | 2257 |
2258 // The method must be an <init> method of the indicated class | |
2259 VerificationType new_class_type = cp_index_to_type( | |
2260 new_class_index, cp, CHECK_VERIFY(this)); | |
2261 if (!new_class_type.equals(ref_class_type)) { | |
6605 | 2262 verify_error(ErrorContext::bad_type(bci, |
2263 TypeOrigin::cp(new_class_index, new_class_type), | |
2264 TypeOrigin::cp(ref_class_index, ref_class_type)), | |
2265 "Call to wrong <init> method"); | |
0 | 2266 return; |
2267 } | |
2268 // According to the VM spec, if the referent class is a superclass of the | |
2269 // current class, and is in a different runtime package, and the method is | |
2270 // protected, then the objectref must be the current class or a subclass | |
2271 // of the current class. | |
2272 VerificationType objectref_type = new_class_type; | |
2273 if (name_in_supers(ref_class_type.name(), current_class())) { | |
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2274 Klass* ref_klass = load_class( |
0 | 2275 ref_class_type.name(), CHECK_VERIFY(this)); |
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2276 Method* m = InstanceKlass::cast(ref_klass)->uncached_lookup_method( |
0 | 2277 vmSymbols::object_initializer_name(), |
1565 | 2278 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 2279 instanceKlassHandle mh(THREAD, m->method_holder()); |
2280 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
2281 bool assignable = current_type().is_assignable_from( | |
2177
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diff
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2282 objectref_type, this, CHECK_VERIFY(this)); |
0 | 2283 if (!assignable) { |
6605 | 2284 verify_error(ErrorContext::bad_type(bci, |
2285 TypeOrigin::cp(new_class_index, objectref_type), | |
2286 TypeOrigin::implicit(current_type())), | |
2287 "Bad access to protected <init> method"); | |
0 | 2288 return; |
2289 } | |
2290 } | |
2291 } | |
2292 current_frame->initialize_object(type, new_class_type); | |
2293 } else { | |
6605 | 2294 verify_error(ErrorContext::bad_type(bci, current_frame->stack_top_ctx()), |
2295 "Bad operand type when invoking <init>"); | |
0 | 2296 return; |
2297 } | |
2298 } | |
2299 | |
2300 void ClassVerifier::verify_invoke_instructions( | |
2301 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
2302 bool *this_uninit, VerificationType return_type, | |
2303 constantPoolHandle cp, TRAPS) { | |
2304 // Make sure the constant pool item is the right type | |
1565 | 2305 u2 index = bcs->get_index_u2(); |
2306 Bytecodes::Code opcode = bcs->raw_code(); | |
0 | 2307 unsigned int types = (opcode == Bytecodes::_invokeinterface |
2308 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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diff
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|
2309 : opcode == Bytecodes::_invokedynamic |
2460 | 2310 ? 1 << JVM_CONSTANT_InvokeDynamic |
0 | 2311 : 1 << JVM_CONSTANT_Methodref); |
6605 | 2312 verify_cp_type(bcs->bci(), index, cp, types, CHECK_VERIFY(this)); |
0 | 2313 |
2314 // Get method name and signature | |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2315 Symbol* method_name = cp->name_ref_at(index); |
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diff
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|
2316 Symbol* method_sig = cp->signature_ref_at(index); |
0 | 2317 |
2318 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
2319 class_format_error( | |
2320 "Invalid method signature in class %s referenced " | |
2321 "from constant pool index %d", _klass->external_name(), index); | |
2322 return; | |
2323 } | |
2324 | |
2325 // Get referenced class type | |
726
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431
diff
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|
2326 VerificationType ref_class_type; |
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431
diff
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|
2327 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 2328 if (!EnableInvokeDynamic || |
2329 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
726
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6655646: dynamic languages need dynamically linked call sites
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431
diff
changeset
|
2330 class_format_error( |
1602 | 2331 (!EnableInvokeDynamic ? |
2332 "invokedynamic instructions not enabled in this JVM" : | |
2333 "invokedynamic instructions not supported by this class file version"), | |
726
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431
diff
changeset
|
2334 _klass->external_name()); |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
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431
diff
changeset
|
2335 return; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2336 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
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431
diff
changeset
|
2337 } else { |
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6655646: dynamic languages need dynamically linked call sites
jrose
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diff
changeset
|
2338 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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431
diff
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|
2339 } |
0 | 2340 |
2341 // For a small signature length, we just allocate 128 bytes instead | |
2342 // of parsing the signature once to find its size. | |
2343 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
2344 // longs/doubles to be consertive. | |
2345 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
2346 "buffer type must match VerificationType size"); | |
2347 uintptr_t on_stack_sig_types_buffer[128]; | |
2348 // If we make a VerificationType[128] array directly, the compiler calls | |
2349 // to the c-runtime library to do the allocation instead of just | |
2350 // stack allocating it. Plus it would run constructors. This shows up | |
2351 // in performance profiles. | |
2352 | |
2353 VerificationType* sig_types; | |
2354 int size = (method_sig->utf8_length() - 3) * 2; | |
2355 if (size > 128) { | |
2356 // Long and double occupies two slots here. | |
2357 ArgumentSizeComputer size_it(method_sig); | |
2358 size = size_it.size(); | |
2359 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
2360 } else{ | |
2361 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
2362 } | |
2363 SignatureStream sig_stream(method_sig); | |
2364 int sig_i = 0; | |
2365 while (!sig_stream.at_return_type()) { | |
2366 sig_i += change_sig_to_verificationType( | |
2367 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
2368 sig_stream.next(); | |
2369 } | |
2370 int nargs = sig_i; | |
2371 | |
2372 #ifdef ASSERT | |
2373 { | |
2374 ArgumentSizeComputer size_it(method_sig); | |
2375 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
2376 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
2377 } | |
2378 #endif | |
2379 | |
2380 // Check instruction operands | |
2381 u2 bci = bcs->bci(); | |
2382 if (opcode == Bytecodes::_invokeinterface) { | |
2383 address bcp = bcs->bcp(); | |
2384 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
2385 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
2386 // the difference between the size of the operand stack before and after the instruction | |
2387 // executes. | |
2388 if (*(bcp+3) != (nargs+1)) { | |
6605 | 2389 verify_error(ErrorContext::bad_code(bci), |
2390 "Inconsistent args count operand in invokeinterface"); | |
0 | 2391 return; |
2392 } | |
2393 if (*(bcp+4) != 0) { | |
6605 | 2394 verify_error(ErrorContext::bad_code(bci), |
2395 "Fourth operand byte of invokeinterface must be zero"); | |
0 | 2396 return; |
2397 } | |
2398 } | |
2399 | |
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diff
changeset
|
2400 if (opcode == Bytecodes::_invokedynamic) { |
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6655646: dynamic languages need dynamically linked call sites
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diff
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|
2401 address bcp = bcs->bcp(); |
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6655646: dynamic languages need dynamically linked call sites
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diff
changeset
|
2402 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
6605 | 2403 verify_error(ErrorContext::bad_code(bci), |
2404 "Third and fourth operand bytes of invokedynamic must be zero"); | |
726
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|
2405 return; |
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6655646: dynamic languages need dynamically linked call sites
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diff
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|
2406 } |
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6655646: dynamic languages need dynamically linked call sites
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diff
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|
2407 } |
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|
2408 |
0 | 2409 if (method_name->byte_at(0) == '<') { |
2410 // Make sure <init> can only be invoked by invokespecial | |
2411 if (opcode != Bytecodes::_invokespecial || | |
2177
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diff
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2412 method_name != vmSymbols::object_initializer_name()) { |
6605 | 2413 verify_error(ErrorContext::bad_code(bci), |
2414 "Illegal call to internal method"); | |
0 | 2415 return; |
2416 } | |
2417 } else if (opcode == Bytecodes::_invokespecial | |
2418 && !ref_class_type.equals(current_type()) | |
2419 && !ref_class_type.equals(VerificationType::reference_type( | |
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2420 current_class()->super()->name()))) { |
0 | 2421 bool subtype = ref_class_type.is_assignable_from( |
2177
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diff
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|
2422 current_type(), this, CHECK_VERIFY(this)); |
0 | 2423 if (!subtype) { |
6605 | 2424 verify_error(ErrorContext::bad_code(bci), |
2425 "Bad invokespecial instruction: " | |
0 | 2426 "current class isn't assignable to reference class."); |
2427 return; | |
2428 } | |
2429 } | |
2430 // Match method descriptor with operand stack | |
2431 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2432 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2433 } | |
2434 // Check objectref on operand stack | |
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|
2435 if (opcode != Bytecodes::_invokestatic && |
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|
2436 opcode != Bytecodes::_invokedynamic) { |
2177
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diff
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|
2437 if (method_name == vmSymbols::object_initializer_name()) { // <init> method |
6605 | 2438 verify_invoke_init(bcs, index, ref_class_type, current_frame, |
0 | 2439 code_length, this_uninit, cp, CHECK_VERIFY(this)); |
2440 } else { // other methods | |
2441 // Ensures that target class is assignable to method class. | |
2442 if (opcode == Bytecodes::_invokespecial) { | |
2443 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2444 } else if (opcode == Bytecodes::_invokevirtual) { | |
2445 VerificationType stack_object_type = | |
2446 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2447 if (current_type() != stack_object_type) { | |
2448 assert(cp->cache() == NULL, "not rewritten yet"); | |
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2449 Symbol* ref_class_name = |
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2450 cp->klass_name_at(cp->klass_ref_index_at(index)); |
0 | 2451 // See the comments in verify_field_instructions() for |
2452 // the rationale behind this. | |
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2453 if (name_in_supers(ref_class_name, current_class())) { |
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2454 Klass* ref_class = load_class(ref_class_name, CHECK); |
0 | 2455 if (is_protected_access( |
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2456 _klass, ref_class, method_name, method_sig, true)) { |
0 | 2457 // It's protected access, check if stack object is |
2458 // assignable to current class. | |
2459 bool is_assignable = current_type().is_assignable_from( | |
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2460 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2461 if (!is_assignable) { |
2462 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2463 && stack_object_type.is_array() | |
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2464 && method_name == vmSymbols::clone_name()) { |
0 | 2465 // Special case: arrays pretend to implement public Object |
2466 // clone(). | |
2467 } else { | |
6605 | 2468 verify_error(ErrorContext::bad_type(bci, |
2469 current_frame->stack_top_ctx(), | |
2470 TypeOrigin::implicit(current_type())), | |
2471 "Bad access to protected data in invokevirtual"); | |
0 | 2472 return; |
2473 } | |
2474 } | |
2475 } | |
2476 } | |
2477 } | |
2478 } else { | |
2479 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2480 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2481 } | |
2482 } | |
2483 } | |
2484 // Push the result type. | |
2485 if (sig_stream.type() != T_VOID) { | |
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2486 if (method_name == vmSymbols::object_initializer_name()) { |
0 | 2487 // <init> method must have a void return type |
6605 | 2488 /* Unreachable? Class file parser verifies that methods with '<' have |
2489 * void return */ | |
2490 verify_error(ErrorContext::bad_code(bci), | |
2491 "Return type must be void in <init> method"); | |
0 | 2492 return; |
2493 } | |
2494 VerificationType return_type[2]; | |
2495 int n = change_sig_to_verificationType( | |
2496 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2497 for (int i = 0; i < n; i++) { | |
2498 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2499 } | |
2500 } | |
2501 } | |
2502 | |
2503 VerificationType ClassVerifier::get_newarray_type( | |
2504 u2 index, u2 bci, TRAPS) { | |
2505 const char* from_bt[] = { | |
2506 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2507 }; | |
2508 if (index < T_BOOLEAN || index > T_LONG) { | |
6605 | 2509 verify_error(ErrorContext::bad_code(bci), "Illegal newarray instruction"); |
0 | 2510 return VerificationType::bogus_type(); |
2511 } | |
2512 | |
2513 // from_bt[index] contains the array signature which has a length of 2 | |
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2514 Symbol* sig = create_temporary_symbol( |
0 | 2515 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); |
2516 return VerificationType::reference_type(sig); | |
2517 } | |
2518 | |
2519 void ClassVerifier::verify_anewarray( | |
6605 | 2520 u2 bci, u2 index, constantPoolHandle cp, |
2521 StackMapFrame* current_frame, TRAPS) { | |
2522 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); | |
0 | 2523 current_frame->pop_stack( |
2524 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2525 | |
2526 VerificationType component_type = | |
2527 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2528 int length; | |
2529 char* arr_sig_str; | |
2530 if (component_type.is_array()) { // it's an array | |
2531 const char* component_name = component_type.name()->as_utf8(); | |
2532 // add one dimension to component | |
2533 length = (int)strlen(component_name) + 1; | |
2534 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2535 arr_sig_str[0] = '['; | |
2536 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2537 } else { // it's an object or interface | |
2538 const char* component_name = component_type.name()->as_utf8(); | |
2539 // add one dimension to component with 'L' prepended and ';' postpended. | |
2540 length = (int)strlen(component_name) + 3; | |
2541 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2542 arr_sig_str[0] = '['; | |
2543 arr_sig_str[1] = 'L'; | |
2544 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2545 arr_sig_str[length - 1] = ';'; | |
2546 } | |
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2547 Symbol* arr_sig = create_temporary_symbol( |
0 | 2548 arr_sig_str, length, CHECK_VERIFY(this)); |
2549 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2550 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2551 } | |
2552 | |
2553 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2554 current_frame->get_local( | |
2555 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2556 current_frame->push_stack( | |
2557 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2558 } | |
2559 | |
2560 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2561 current_frame->get_local_2( | |
2562 index, VerificationType::long_type(), | |
2563 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2564 current_frame->push_stack_2( | |
2565 VerificationType::long_type(), | |
2566 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2567 } | |
2568 | |
2569 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2570 current_frame->get_local( | |
2571 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2572 current_frame->push_stack( | |
2573 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2574 } | |
2575 | |
2576 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2577 current_frame->get_local_2( | |
2578 index, VerificationType::double_type(), | |
2579 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2580 current_frame->push_stack_2( | |
2581 VerificationType::double_type(), | |
2582 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2583 } | |
2584 | |
2585 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2586 VerificationType type = current_frame->get_local( | |
2587 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2588 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2589 } | |
2590 | |
2591 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2592 current_frame->pop_stack( | |
2593 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2594 current_frame->set_local( | |
2595 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2596 } | |
2597 | |
2598 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2599 current_frame->pop_stack_2( | |
2600 VerificationType::long2_type(), | |
2601 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2602 current_frame->set_local_2( | |
2603 index, VerificationType::long_type(), | |
2604 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2605 } | |
2606 | |
2607 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2608 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2609 current_frame->set_local( | |
2610 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2611 } | |
2612 | |
2613 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2614 current_frame->pop_stack_2( | |
2615 VerificationType::double2_type(), | |
2616 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2617 current_frame->set_local_2( | |
2618 index, VerificationType::double_type(), | |
2619 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2620 } | |
2621 | |
2622 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2623 VerificationType type = current_frame->pop_stack( | |
2624 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2625 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2626 } | |
2627 | |
2628 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2629 VerificationType type = current_frame->get_local( | |
2630 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2631 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2632 } | |
2633 | |
2634 void ClassVerifier::verify_return_value( | |
6605 | 2635 VerificationType return_type, VerificationType type, u2 bci, |
2636 StackMapFrame* current_frame, TRAPS) { | |
0 | 2637 if (return_type == VerificationType::bogus_type()) { |
6605 | 2638 verify_error(ErrorContext::bad_type(bci, |
2639 current_frame->stack_top_ctx(), TypeOrigin::signature(return_type)), | |
2640 "Method expects a return value"); | |
0 | 2641 return; |
2642 } | |
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2643 bool match = return_type.is_assignable_from(type, this, CHECK_VERIFY(this)); |
0 | 2644 if (!match) { |
6605 | 2645 verify_error(ErrorContext::bad_type(bci, |
2646 current_frame->stack_top_ctx(), TypeOrigin::signature(return_type)), | |
2647 "Bad return type"); | |
0 | 2648 return; |
2649 } | |
2650 } | |
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2651 |
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2652 // The verifier creates symbols which are substrings of Symbols. |
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2653 // These are stored in the verifier until the end of verification so that |
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2654 // they can be reference counted. |
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2655 Symbol* ClassVerifier::create_temporary_symbol(const Symbol *s, int begin, |
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2656 int end, TRAPS) { |
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2657 Symbol* sym = SymbolTable::new_symbol(s, begin, end, CHECK_NULL); |
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2658 _symbols->push(sym); |
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2659 return sym; |
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2660 } |
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2661 |
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2662 Symbol* ClassVerifier::create_temporary_symbol(const char *s, int length, TRAPS) { |
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2663 Symbol* sym = SymbolTable::new_symbol(s, length, CHECK_NULL); |
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2664 _symbols->push(sym); |
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2665 return sym; |
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2666 } |