Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.cpp @ 7985:ab826603e572
8007475: Memory stomp with UseMallocOnly
Summary: Fix off-by-one error
Reviewed-by: coleenp, hseigel
author | simonis |
---|---|
date | Mon, 04 Feb 2013 13:14:12 -0500 |
parents | 18fb7da42534 |
children | 3a531d40ad93 |
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 = 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); |
6934 | 558 if (m->is_native() || m->is_abstract() || m->is_overpass()) { |
0 | 559 // If m is native or abstract, skip it. It is checked in class file |
6934 | 560 // parser that methods do not override a final method. Overpass methods |
561 // are trusted since the VM generates them. | |
0 | 562 continue; |
563 } | |
564 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
565 } | |
1570 | 566 |
6605 | 567 if (VerboseVerification || TraceClassInitialization) { |
1570 | 568 if (was_recursively_verified()) |
569 tty->print_cr("Recursive verification detected for: %s", | |
570 _klass->external_name()); | |
571 } | |
0 | 572 } |
573 | |
574 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
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575 HandleMark hm(THREAD); |
0 | 576 _method = m; // initialize _method |
6605 | 577 if (VerboseVerification) { |
0 | 578 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); |
579 } | |
580 | |
581 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
582 | |
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583 int32_t max_stack = m->verifier_max_stack(); |
0 | 584 int32_t max_locals = m->max_locals(); |
585 constantPoolHandle cp(THREAD, m->constants()); | |
586 | |
587 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
588 class_format_error("Invalid method signature"); | |
589 return; | |
590 } | |
591 | |
592 // Initial stack map frame: offset is 0, stack is initially empty. | |
593 StackMapFrame current_frame(max_locals, max_stack, this); | |
594 // Set initial locals | |
595 VerificationType return_type = current_frame.set_locals_from_arg( | |
596 m, current_type(), CHECK_VERIFY(this)); | |
597 | |
598 int32_t stackmap_index = 0; // index to the stackmap array | |
599 | |
600 u4 code_length = m->code_size(); | |
601 | |
602 // Scan the bytecode and map each instruction's start offset to a number. | |
603 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
604 | |
605 int ex_min = code_length; | |
606 int ex_max = -1; | |
607 // Look through each item on the exception table. Each of the fields must refer | |
608 // to a legal instruction. | |
609 verify_exception_handler_table( | |
610 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
611 | |
612 // Look through each entry on the local variable table and make sure | |
613 // its range of code array offsets is valid. (4169817) | |
614 if (m->has_localvariable_table()) { | |
615 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
616 } | |
617 | |
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618 Array<u1>* stackmap_data = m->stackmap_data(); |
0 | 619 StackMapStream stream(stackmap_data); |
620 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
621 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
622 code_data, code_length, CHECK_VERIFY(this)); | |
623 | |
6605 | 624 if (VerboseVerification) { |
625 stackmap_table.print_on(tty); | |
0 | 626 } |
627 | |
628 RawBytecodeStream bcs(m); | |
629 | |
630 // Scan the byte code linearly from the start to the end | |
631 bool no_control_flow = false; // Set to true when there is no direct control | |
632 // flow from current instruction to the next | |
633 // instruction in sequence | |
634 Bytecodes::Code opcode; | |
635 while (!bcs.is_last_bytecode()) { | |
1570 | 636 // Check for recursive re-verification before each bytecode. |
637 if (was_recursively_verified()) return; | |
638 | |
0 | 639 opcode = bcs.raw_next(); |
640 u2 bci = bcs.bci(); | |
641 | |
642 // Set current frame's offset to bci | |
643 current_frame.set_offset(bci); | |
6605 | 644 current_frame.set_mark(); |
0 | 645 |
646 // Make sure every offset in stackmap table point to the beginning to | |
647 // an instruction. Match current_frame to stackmap_table entry with | |
648 // the same offset if exists. | |
649 stackmap_index = verify_stackmap_table( | |
650 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
651 no_control_flow, CHECK_VERIFY(this)); | |
652 | |
6605 | 653 |
0 | 654 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' |
655 | |
656 // Merge with the next instruction | |
657 { | |
658 u2 index; | |
659 int target; | |
660 VerificationType type, type2; | |
661 VerificationType atype; | |
662 | |
663 #ifndef PRODUCT | |
6605 | 664 if (VerboseVerification) { |
665 current_frame.print_on(tty); | |
0 | 666 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); |
667 } | |
668 #endif | |
669 | |
670 // Make sure wide instruction is in correct format | |
671 if (bcs.is_wide()) { | |
672 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
673 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
674 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
675 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
676 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
677 opcode != Bytecodes::_dstore) { | |
6605 | 678 /* Unreachable? RawBytecodeStream's raw_next() returns 'illegal' |
679 * if we encounter a wide instruction that modifies an invalid | |
680 * opcode (not one of the ones listed above) */ | |
681 verify_error(ErrorContext::bad_code(bci), "Bad wide instruction"); | |
0 | 682 return; |
683 } | |
684 } | |
685 | |
686 switch (opcode) { | |
687 case Bytecodes::_nop : | |
688 no_control_flow = false; break; | |
689 case Bytecodes::_aconst_null : | |
690 current_frame.push_stack( | |
691 VerificationType::null_type(), CHECK_VERIFY(this)); | |
692 no_control_flow = false; break; | |
693 case Bytecodes::_iconst_m1 : | |
694 case Bytecodes::_iconst_0 : | |
695 case Bytecodes::_iconst_1 : | |
696 case Bytecodes::_iconst_2 : | |
697 case Bytecodes::_iconst_3 : | |
698 case Bytecodes::_iconst_4 : | |
699 case Bytecodes::_iconst_5 : | |
700 current_frame.push_stack( | |
701 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
702 no_control_flow = false; break; | |
703 case Bytecodes::_lconst_0 : | |
704 case Bytecodes::_lconst_1 : | |
705 current_frame.push_stack_2( | |
706 VerificationType::long_type(), | |
707 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
708 no_control_flow = false; break; | |
709 case Bytecodes::_fconst_0 : | |
710 case Bytecodes::_fconst_1 : | |
711 case Bytecodes::_fconst_2 : | |
712 current_frame.push_stack( | |
713 VerificationType::float_type(), CHECK_VERIFY(this)); | |
714 no_control_flow = false; break; | |
715 case Bytecodes::_dconst_0 : | |
716 case Bytecodes::_dconst_1 : | |
717 current_frame.push_stack_2( | |
718 VerificationType::double_type(), | |
719 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
720 no_control_flow = false; break; | |
721 case Bytecodes::_sipush : | |
722 case Bytecodes::_bipush : | |
723 current_frame.push_stack( | |
724 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
725 no_control_flow = false; break; | |
726 case Bytecodes::_ldc : | |
727 verify_ldc( | |
1565 | 728 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 729 cp, bci, CHECK_VERIFY(this)); |
730 no_control_flow = false; break; | |
731 case Bytecodes::_ldc_w : | |
732 case Bytecodes::_ldc2_w : | |
733 verify_ldc( | |
1565 | 734 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 735 cp, bci, CHECK_VERIFY(this)); |
736 no_control_flow = false; break; | |
737 case Bytecodes::_iload : | |
738 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
739 no_control_flow = false; break; | |
740 case Bytecodes::_iload_0 : | |
741 case Bytecodes::_iload_1 : | |
742 case Bytecodes::_iload_2 : | |
743 case Bytecodes::_iload_3 : | |
744 index = opcode - Bytecodes::_iload_0; | |
745 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
746 no_control_flow = false; break; | |
747 case Bytecodes::_lload : | |
748 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
749 no_control_flow = false; break; | |
750 case Bytecodes::_lload_0 : | |
751 case Bytecodes::_lload_1 : | |
752 case Bytecodes::_lload_2 : | |
753 case Bytecodes::_lload_3 : | |
754 index = opcode - Bytecodes::_lload_0; | |
755 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
756 no_control_flow = false; break; | |
757 case Bytecodes::_fload : | |
758 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
759 no_control_flow = false; break; | |
760 case Bytecodes::_fload_0 : | |
761 case Bytecodes::_fload_1 : | |
762 case Bytecodes::_fload_2 : | |
763 case Bytecodes::_fload_3 : | |
764 index = opcode - Bytecodes::_fload_0; | |
765 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
766 no_control_flow = false; break; | |
767 case Bytecodes::_dload : | |
768 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
769 no_control_flow = false; break; | |
770 case Bytecodes::_dload_0 : | |
771 case Bytecodes::_dload_1 : | |
772 case Bytecodes::_dload_2 : | |
773 case Bytecodes::_dload_3 : | |
774 index = opcode - Bytecodes::_dload_0; | |
775 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
776 no_control_flow = false; break; | |
777 case Bytecodes::_aload : | |
778 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
779 no_control_flow = false; break; | |
780 case Bytecodes::_aload_0 : | |
781 case Bytecodes::_aload_1 : | |
782 case Bytecodes::_aload_2 : | |
783 case Bytecodes::_aload_3 : | |
784 index = opcode - Bytecodes::_aload_0; | |
785 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
786 no_control_flow = false; break; | |
787 case Bytecodes::_iaload : | |
788 type = current_frame.pop_stack( | |
789 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
790 atype = current_frame.pop_stack( | |
791 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
792 if (!atype.is_int_array()) { | |
6605 | 793 verify_error(ErrorContext::bad_type(bci, |
794 current_frame.stack_top_ctx(), ref_ctx("[I", THREAD)), | |
795 bad_type_msg, "iaload"); | |
0 | 796 return; |
797 } | |
798 current_frame.push_stack( | |
799 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
800 no_control_flow = false; break; | |
801 case Bytecodes::_baload : | |
802 type = current_frame.pop_stack( | |
803 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
804 atype = current_frame.pop_stack( | |
805 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
806 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
6605 | 807 verify_error( |
808 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
809 bad_type_msg, "baload"); | |
0 | 810 return; |
811 } | |
812 current_frame.push_stack( | |
813 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
814 no_control_flow = false; break; | |
815 case Bytecodes::_caload : | |
816 type = current_frame.pop_stack( | |
817 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
818 atype = current_frame.pop_stack( | |
819 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
820 if (!atype.is_char_array()) { | |
6605 | 821 verify_error(ErrorContext::bad_type(bci, |
822 current_frame.stack_top_ctx(), ref_ctx("[C", THREAD)), | |
823 bad_type_msg, "caload"); | |
0 | 824 return; |
825 } | |
826 current_frame.push_stack( | |
827 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
828 no_control_flow = false; break; | |
829 case Bytecodes::_saload : | |
830 type = current_frame.pop_stack( | |
831 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
832 atype = current_frame.pop_stack( | |
833 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
834 if (!atype.is_short_array()) { | |
6605 | 835 verify_error(ErrorContext::bad_type(bci, |
836 current_frame.stack_top_ctx(), ref_ctx("[S", THREAD)), | |
837 bad_type_msg, "saload"); | |
0 | 838 return; |
839 } | |
840 current_frame.push_stack( | |
841 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
842 no_control_flow = false; break; | |
843 case Bytecodes::_laload : | |
844 type = current_frame.pop_stack( | |
845 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
846 atype = current_frame.pop_stack( | |
847 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
848 if (!atype.is_long_array()) { | |
6605 | 849 verify_error(ErrorContext::bad_type(bci, |
850 current_frame.stack_top_ctx(), ref_ctx("[J", THREAD)), | |
851 bad_type_msg, "laload"); | |
0 | 852 return; |
853 } | |
854 current_frame.push_stack_2( | |
855 VerificationType::long_type(), | |
856 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
857 no_control_flow = false; break; | |
858 case Bytecodes::_faload : | |
859 type = current_frame.pop_stack( | |
860 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
861 atype = current_frame.pop_stack( | |
862 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
863 if (!atype.is_float_array()) { | |
6605 | 864 verify_error(ErrorContext::bad_type(bci, |
865 current_frame.stack_top_ctx(), ref_ctx("[F", THREAD)), | |
866 bad_type_msg, "faload"); | |
0 | 867 return; |
868 } | |
869 current_frame.push_stack( | |
870 VerificationType::float_type(), CHECK_VERIFY(this)); | |
871 no_control_flow = false; break; | |
872 case Bytecodes::_daload : | |
873 type = current_frame.pop_stack( | |
874 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
875 atype = current_frame.pop_stack( | |
876 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
877 if (!atype.is_double_array()) { | |
6605 | 878 verify_error(ErrorContext::bad_type(bci, |
879 current_frame.stack_top_ctx(), ref_ctx("[D", THREAD)), | |
880 bad_type_msg, "daload"); | |
0 | 881 return; |
882 } | |
883 current_frame.push_stack_2( | |
884 VerificationType::double_type(), | |
885 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
886 no_control_flow = false; break; | |
887 case Bytecodes::_aaload : { | |
888 type = current_frame.pop_stack( | |
889 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
890 atype = current_frame.pop_stack( | |
891 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
892 if (!atype.is_reference_array()) { | |
6605 | 893 verify_error(ErrorContext::bad_type(bci, |
894 current_frame.stack_top_ctx(), | |
895 TypeOrigin::implicit(VerificationType::reference_check())), | |
896 bad_type_msg, "aaload"); | |
0 | 897 return; |
898 } | |
899 if (atype.is_null()) { | |
900 current_frame.push_stack( | |
901 VerificationType::null_type(), CHECK_VERIFY(this)); | |
902 } else { | |
903 VerificationType component = | |
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904 atype.get_component(this, CHECK_VERIFY(this)); |
0 | 905 current_frame.push_stack(component, CHECK_VERIFY(this)); |
906 } | |
907 no_control_flow = false; break; | |
908 } | |
909 case Bytecodes::_istore : | |
910 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
911 no_control_flow = false; break; | |
912 case Bytecodes::_istore_0 : | |
913 case Bytecodes::_istore_1 : | |
914 case Bytecodes::_istore_2 : | |
915 case Bytecodes::_istore_3 : | |
916 index = opcode - Bytecodes::_istore_0; | |
917 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
918 no_control_flow = false; break; | |
919 case Bytecodes::_lstore : | |
920 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
921 no_control_flow = false; break; | |
922 case Bytecodes::_lstore_0 : | |
923 case Bytecodes::_lstore_1 : | |
924 case Bytecodes::_lstore_2 : | |
925 case Bytecodes::_lstore_3 : | |
926 index = opcode - Bytecodes::_lstore_0; | |
927 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
928 no_control_flow = false; break; | |
929 case Bytecodes::_fstore : | |
930 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
931 no_control_flow = false; break; | |
932 case Bytecodes::_fstore_0 : | |
933 case Bytecodes::_fstore_1 : | |
934 case Bytecodes::_fstore_2 : | |
935 case Bytecodes::_fstore_3 : | |
936 index = opcode - Bytecodes::_fstore_0; | |
937 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
938 no_control_flow = false; break; | |
939 case Bytecodes::_dstore : | |
940 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
941 no_control_flow = false; break; | |
942 case Bytecodes::_dstore_0 : | |
943 case Bytecodes::_dstore_1 : | |
944 case Bytecodes::_dstore_2 : | |
945 case Bytecodes::_dstore_3 : | |
946 index = opcode - Bytecodes::_dstore_0; | |
947 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
948 no_control_flow = false; break; | |
949 case Bytecodes::_astore : | |
950 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
951 no_control_flow = false; break; | |
952 case Bytecodes::_astore_0 : | |
953 case Bytecodes::_astore_1 : | |
954 case Bytecodes::_astore_2 : | |
955 case Bytecodes::_astore_3 : | |
956 index = opcode - Bytecodes::_astore_0; | |
957 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
958 no_control_flow = false; break; | |
959 case Bytecodes::_iastore : | |
960 type = current_frame.pop_stack( | |
961 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
962 type2 = current_frame.pop_stack( | |
963 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
964 atype = current_frame.pop_stack( | |
965 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
966 if (!atype.is_int_array()) { | |
6605 | 967 verify_error(ErrorContext::bad_type(bci, |
968 current_frame.stack_top_ctx(), ref_ctx("[I", THREAD)), | |
969 bad_type_msg, "iastore"); | |
0 | 970 return; |
971 } | |
972 no_control_flow = false; break; | |
973 case Bytecodes::_bastore : | |
974 type = current_frame.pop_stack( | |
975 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
976 type2 = current_frame.pop_stack( | |
977 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
978 atype = current_frame.pop_stack( | |
979 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
980 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
6605 | 981 verify_error( |
982 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
983 bad_type_msg, "bastore"); | |
0 | 984 return; |
985 } | |
986 no_control_flow = false; break; | |
987 case Bytecodes::_castore : | |
988 current_frame.pop_stack( | |
989 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
990 current_frame.pop_stack( | |
991 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
992 atype = current_frame.pop_stack( | |
993 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
994 if (!atype.is_char_array()) { | |
6605 | 995 verify_error(ErrorContext::bad_type(bci, |
996 current_frame.stack_top_ctx(), ref_ctx("[C", THREAD)), | |
997 bad_type_msg, "castore"); | |
0 | 998 return; |
999 } | |
1000 no_control_flow = false; break; | |
1001 case Bytecodes::_sastore : | |
1002 current_frame.pop_stack( | |
1003 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1004 current_frame.pop_stack( | |
1005 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1006 atype = current_frame.pop_stack( | |
1007 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1008 if (!atype.is_short_array()) { | |
6605 | 1009 verify_error(ErrorContext::bad_type(bci, |
1010 current_frame.stack_top_ctx(), ref_ctx("[S", THREAD)), | |
1011 bad_type_msg, "sastore"); | |
0 | 1012 return; |
1013 } | |
1014 no_control_flow = false; break; | |
1015 case Bytecodes::_lastore : | |
1016 current_frame.pop_stack_2( | |
1017 VerificationType::long2_type(), | |
1018 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1019 current_frame.pop_stack( | |
1020 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1021 atype = current_frame.pop_stack( | |
1022 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1023 if (!atype.is_long_array()) { | |
6605 | 1024 verify_error(ErrorContext::bad_type(bci, |
1025 current_frame.stack_top_ctx(), ref_ctx("[J", THREAD)), | |
1026 bad_type_msg, "lastore"); | |
0 | 1027 return; |
1028 } | |
1029 no_control_flow = false; break; | |
1030 case Bytecodes::_fastore : | |
1031 current_frame.pop_stack( | |
1032 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1033 current_frame.pop_stack | |
1034 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1035 atype = current_frame.pop_stack( | |
1036 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1037 if (!atype.is_float_array()) { | |
6605 | 1038 verify_error(ErrorContext::bad_type(bci, |
1039 current_frame.stack_top_ctx(), ref_ctx("[F", THREAD)), | |
1040 bad_type_msg, "fastore"); | |
0 | 1041 return; |
1042 } | |
1043 no_control_flow = false; break; | |
1044 case Bytecodes::_dastore : | |
1045 current_frame.pop_stack_2( | |
1046 VerificationType::double2_type(), | |
1047 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1048 current_frame.pop_stack( | |
1049 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1050 atype = current_frame.pop_stack( | |
1051 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1052 if (!atype.is_double_array()) { | |
6605 | 1053 verify_error(ErrorContext::bad_type(bci, |
1054 current_frame.stack_top_ctx(), ref_ctx("[D", THREAD)), | |
1055 bad_type_msg, "dastore"); | |
0 | 1056 return; |
1057 } | |
1058 no_control_flow = false; break; | |
1059 case Bytecodes::_aastore : | |
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|
1060 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1061 type2 = current_frame.pop_stack( |
1062 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1063 atype = current_frame.pop_stack( | |
1064 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1065 // more type-checking is done at runtime | |
1066 if (!atype.is_reference_array()) { | |
6605 | 1067 verify_error(ErrorContext::bad_type(bci, |
1068 current_frame.stack_top_ctx(), | |
1069 TypeOrigin::implicit(VerificationType::reference_check())), | |
1070 bad_type_msg, "aastore"); | |
0 | 1071 return; |
1072 } | |
1073 // 4938384: relaxed constraint in JVMS 3nd edition. | |
1074 no_control_flow = false; break; | |
1075 case Bytecodes::_pop : | |
1076 current_frame.pop_stack( | |
1077 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1078 no_control_flow = false; break; | |
1079 case Bytecodes::_pop2 : | |
1080 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1081 if (type.is_category1()) { | |
1082 current_frame.pop_stack( | |
1083 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1084 } else if (type.is_category2_2nd()) { | |
1085 current_frame.pop_stack( | |
1086 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1087 } else { | |
6605 | 1088 /* Unreachable? Would need a category2_1st on TOS |
1089 * which does not appear possible. */ | |
1090 verify_error( | |
1091 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1092 bad_type_msg, "pop2"); | |
0 | 1093 return; |
1094 } | |
1095 no_control_flow = false; break; | |
1096 case Bytecodes::_dup : | |
1097 type = current_frame.pop_stack( | |
1098 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1099 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1100 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1101 no_control_flow = false; break; | |
1102 case Bytecodes::_dup_x1 : | |
1103 type = current_frame.pop_stack( | |
1104 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1105 type2 = current_frame.pop_stack( | |
1106 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1107 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1108 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1109 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1110 no_control_flow = false; break; | |
1111 case Bytecodes::_dup_x2 : | |
1112 { | |
1113 VerificationType type3; | |
1114 type = current_frame.pop_stack( | |
1115 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1116 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1117 if (type2.is_category1()) { | |
1118 type3 = current_frame.pop_stack( | |
1119 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1120 } else if (type2.is_category2_2nd()) { | |
1121 type3 = current_frame.pop_stack( | |
1122 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1123 } else { | |
6605 | 1124 /* Unreachable? Would need a category2_1st at stack depth 2 with |
1125 * a category1 on TOS which does not appear possible. */ | |
1126 verify_error(ErrorContext::bad_type( | |
1127 bci, current_frame.stack_top_ctx()), bad_type_msg, "dup_x2"); | |
0 | 1128 return; |
1129 } | |
1130 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1131 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1132 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1133 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1134 no_control_flow = false; break; | |
1135 } | |
1136 case Bytecodes::_dup2 : | |
1137 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1138 if (type.is_category1()) { | |
1139 type2 = current_frame.pop_stack( | |
1140 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1141 } else if (type.is_category2_2nd()) { | |
1142 type2 = current_frame.pop_stack( | |
1143 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1144 } else { | |
6605 | 1145 /* Unreachable? Would need a category2_1st on TOS which does not |
1146 * appear possible. */ | |
1147 verify_error( | |
1148 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1149 bad_type_msg, "dup2"); | |
0 | 1150 return; |
1151 } | |
1152 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1153 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1154 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1155 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1156 no_control_flow = false; break; | |
1157 case Bytecodes::_dup2_x1 : | |
1158 { | |
1159 VerificationType type3; | |
1160 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1161 if (type.is_category1()) { | |
1162 type2 = current_frame.pop_stack( | |
1163 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
6605 | 1164 } else if (type.is_category2_2nd()) { |
1165 type2 = current_frame.pop_stack( | |
1166 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
0 | 1167 } else { |
6605 | 1168 /* Unreachable? Would need a category2_1st on TOS which does |
1169 * not appear possible. */ | |
1170 verify_error( | |
1171 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1172 bad_type_msg, "dup2_x1"); | |
0 | 1173 return; |
1174 } | |
1175 type3 = current_frame.pop_stack( | |
1176 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1177 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1178 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1179 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1180 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1181 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1182 no_control_flow = false; break; | |
1183 } | |
1184 case Bytecodes::_dup2_x2 : | |
1185 { | |
1186 VerificationType type3, type4; | |
1187 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1188 if (type.is_category1()) { | |
1189 type2 = current_frame.pop_stack( | |
1190 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1191 } else if (type.is_category2_2nd()) { | |
1192 type2 = current_frame.pop_stack( | |
1193 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1194 } else { | |
6605 | 1195 /* Unreachable? Would need a category2_1st on TOS which does |
1196 * not appear possible. */ | |
1197 verify_error( | |
1198 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1199 bad_type_msg, "dup2_x2"); | |
0 | 1200 return; |
1201 } | |
1202 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
1203 if (type3.is_category1()) { | |
1204 type4 = current_frame.pop_stack( | |
1205 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1206 } else if (type3.is_category2_2nd()) { | |
1207 type4 = current_frame.pop_stack( | |
1208 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
1209 } else { | |
6605 | 1210 /* Unreachable? Would need a category2_1st on TOS after popping |
1211 * a long/double or two category 1's, which does not | |
1212 * appear possible. */ | |
1213 verify_error( | |
1214 ErrorContext::bad_type(bci, current_frame.stack_top_ctx()), | |
1215 bad_type_msg, "dup2_x2"); | |
0 | 1216 return; |
1217 } | |
1218 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1219 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1220 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
1221 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
1222 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1223 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1224 no_control_flow = false; break; | |
1225 } | |
1226 case Bytecodes::_swap : | |
1227 type = current_frame.pop_stack( | |
1228 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1229 type2 = current_frame.pop_stack( | |
1230 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
1231 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1232 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
1233 no_control_flow = false; break; | |
1234 case Bytecodes::_iadd : | |
1235 case Bytecodes::_isub : | |
1236 case Bytecodes::_imul : | |
1237 case Bytecodes::_idiv : | |
1238 case Bytecodes::_irem : | |
1239 case Bytecodes::_ishl : | |
1240 case Bytecodes::_ishr : | |
1241 case Bytecodes::_iushr : | |
1242 case Bytecodes::_ior : | |
1243 case Bytecodes::_ixor : | |
1244 case Bytecodes::_iand : | |
1245 current_frame.pop_stack( | |
1246 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1247 // fall through | |
1248 case Bytecodes::_ineg : | |
1249 current_frame.pop_stack( | |
1250 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1251 current_frame.push_stack( | |
1252 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1253 no_control_flow = false; break; | |
1254 case Bytecodes::_ladd : | |
1255 case Bytecodes::_lsub : | |
1256 case Bytecodes::_lmul : | |
1257 case Bytecodes::_ldiv : | |
1258 case Bytecodes::_lrem : | |
1259 case Bytecodes::_land : | |
1260 case Bytecodes::_lor : | |
1261 case Bytecodes::_lxor : | |
1262 current_frame.pop_stack_2( | |
1263 VerificationType::long2_type(), | |
1264 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1265 // fall through | |
1266 case Bytecodes::_lneg : | |
1267 current_frame.pop_stack_2( | |
1268 VerificationType::long2_type(), | |
1269 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1270 current_frame.push_stack_2( | |
1271 VerificationType::long_type(), | |
1272 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1273 no_control_flow = false; break; | |
1274 case Bytecodes::_lshl : | |
1275 case Bytecodes::_lshr : | |
1276 case Bytecodes::_lushr : | |
1277 current_frame.pop_stack( | |
1278 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1279 current_frame.pop_stack_2( | |
1280 VerificationType::long2_type(), | |
1281 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1282 current_frame.push_stack_2( | |
1283 VerificationType::long_type(), | |
1284 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1285 no_control_flow = false; break; | |
1286 case Bytecodes::_fadd : | |
1287 case Bytecodes::_fsub : | |
1288 case Bytecodes::_fmul : | |
1289 case Bytecodes::_fdiv : | |
1290 case Bytecodes::_frem : | |
1291 current_frame.pop_stack( | |
1292 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1293 // fall through | |
1294 case Bytecodes::_fneg : | |
1295 current_frame.pop_stack( | |
1296 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1297 current_frame.push_stack( | |
1298 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1299 no_control_flow = false; break; | |
1300 case Bytecodes::_dadd : | |
1301 case Bytecodes::_dsub : | |
1302 case Bytecodes::_dmul : | |
1303 case Bytecodes::_ddiv : | |
1304 case Bytecodes::_drem : | |
1305 current_frame.pop_stack_2( | |
1306 VerificationType::double2_type(), | |
1307 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1308 // fall through | |
1309 case Bytecodes::_dneg : | |
1310 current_frame.pop_stack_2( | |
1311 VerificationType::double2_type(), | |
1312 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1313 current_frame.push_stack_2( | |
1314 VerificationType::double_type(), | |
1315 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1316 no_control_flow = false; break; | |
1317 case Bytecodes::_iinc : | |
1318 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
1319 no_control_flow = false; break; | |
1320 case Bytecodes::_i2l : | |
1321 type = current_frame.pop_stack( | |
1322 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1323 current_frame.push_stack_2( | |
1324 VerificationType::long_type(), | |
1325 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1326 no_control_flow = false; break; | |
1327 case Bytecodes::_l2i : | |
1328 current_frame.pop_stack_2( | |
1329 VerificationType::long2_type(), | |
1330 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1331 current_frame.push_stack( | |
1332 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1333 no_control_flow = false; break; | |
1334 case Bytecodes::_i2f : | |
1335 current_frame.pop_stack( | |
1336 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1337 current_frame.push_stack( | |
1338 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1339 no_control_flow = false; break; | |
1340 case Bytecodes::_i2d : | |
1341 current_frame.pop_stack( | |
1342 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1343 current_frame.push_stack_2( | |
1344 VerificationType::double_type(), | |
1345 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1346 no_control_flow = false; break; | |
1347 case Bytecodes::_l2f : | |
1348 current_frame.pop_stack_2( | |
1349 VerificationType::long2_type(), | |
1350 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1351 current_frame.push_stack( | |
1352 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1353 no_control_flow = false; break; | |
1354 case Bytecodes::_l2d : | |
1355 current_frame.pop_stack_2( | |
1356 VerificationType::long2_type(), | |
1357 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1358 current_frame.push_stack_2( | |
1359 VerificationType::double_type(), | |
1360 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1361 no_control_flow = false; break; | |
1362 case Bytecodes::_f2i : | |
1363 current_frame.pop_stack( | |
1364 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1365 current_frame.push_stack( | |
1366 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1367 no_control_flow = false; break; | |
1368 case Bytecodes::_f2l : | |
1369 current_frame.pop_stack( | |
1370 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1371 current_frame.push_stack_2( | |
1372 VerificationType::long_type(), | |
1373 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1374 no_control_flow = false; break; | |
1375 case Bytecodes::_f2d : | |
1376 current_frame.pop_stack( | |
1377 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1378 current_frame.push_stack_2( | |
1379 VerificationType::double_type(), | |
1380 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1381 no_control_flow = false; break; | |
1382 case Bytecodes::_d2i : | |
1383 current_frame.pop_stack_2( | |
1384 VerificationType::double2_type(), | |
1385 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1386 current_frame.push_stack( | |
1387 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1388 no_control_flow = false; break; | |
1389 case Bytecodes::_d2l : | |
1390 current_frame.pop_stack_2( | |
1391 VerificationType::double2_type(), | |
1392 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1393 current_frame.push_stack_2( | |
1394 VerificationType::long_type(), | |
1395 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1396 no_control_flow = false; break; | |
1397 case Bytecodes::_d2f : | |
1398 current_frame.pop_stack_2( | |
1399 VerificationType::double2_type(), | |
1400 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1401 current_frame.push_stack( | |
1402 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1403 no_control_flow = false; break; | |
1404 case Bytecodes::_i2b : | |
1405 case Bytecodes::_i2c : | |
1406 case Bytecodes::_i2s : | |
1407 current_frame.pop_stack( | |
1408 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1409 current_frame.push_stack( | |
1410 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1411 no_control_flow = false; break; | |
1412 case Bytecodes::_lcmp : | |
1413 current_frame.pop_stack_2( | |
1414 VerificationType::long2_type(), | |
1415 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1416 current_frame.pop_stack_2( | |
1417 VerificationType::long2_type(), | |
1418 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1419 current_frame.push_stack( | |
1420 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1421 no_control_flow = false; break; | |
1422 case Bytecodes::_fcmpl : | |
1423 case Bytecodes::_fcmpg : | |
1424 current_frame.pop_stack( | |
1425 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1426 current_frame.pop_stack( | |
1427 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1428 current_frame.push_stack( | |
1429 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1430 no_control_flow = false; break; | |
1431 case Bytecodes::_dcmpl : | |
1432 case Bytecodes::_dcmpg : | |
1433 current_frame.pop_stack_2( | |
1434 VerificationType::double2_type(), | |
1435 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1436 current_frame.pop_stack_2( | |
1437 VerificationType::double2_type(), | |
1438 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1439 current_frame.push_stack( | |
1440 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1441 no_control_flow = false; break; | |
1442 case Bytecodes::_if_icmpeq: | |
1443 case Bytecodes::_if_icmpne: | |
1444 case Bytecodes::_if_icmplt: | |
1445 case Bytecodes::_if_icmpge: | |
1446 case Bytecodes::_if_icmpgt: | |
1447 case Bytecodes::_if_icmple: | |
1448 current_frame.pop_stack( | |
1449 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1450 // fall through | |
1451 case Bytecodes::_ifeq: | |
1452 case Bytecodes::_ifne: | |
1453 case Bytecodes::_iflt: | |
1454 case Bytecodes::_ifge: | |
1455 case Bytecodes::_ifgt: | |
1456 case Bytecodes::_ifle: | |
1457 current_frame.pop_stack( | |
1458 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1459 target = bcs.dest(); | |
1460 stackmap_table.check_jump_target( | |
1461 ¤t_frame, target, CHECK_VERIFY(this)); | |
1462 no_control_flow = false; break; | |
1463 case Bytecodes::_if_acmpeq : | |
1464 case Bytecodes::_if_acmpne : | |
1465 current_frame.pop_stack( | |
1466 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1467 // fall through | |
1468 case Bytecodes::_ifnull : | |
1469 case Bytecodes::_ifnonnull : | |
1470 current_frame.pop_stack( | |
1471 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1472 target = bcs.dest(); | |
1473 stackmap_table.check_jump_target | |
1474 (¤t_frame, target, CHECK_VERIFY(this)); | |
1475 no_control_flow = false; break; | |
1476 case Bytecodes::_goto : | |
1477 target = bcs.dest(); | |
1478 stackmap_table.check_jump_target( | |
1479 ¤t_frame, target, CHECK_VERIFY(this)); | |
1480 no_control_flow = true; break; | |
1481 case Bytecodes::_goto_w : | |
1482 target = bcs.dest_w(); | |
1483 stackmap_table.check_jump_target( | |
1484 ¤t_frame, target, CHECK_VERIFY(this)); | |
1485 no_control_flow = true; break; | |
1486 case Bytecodes::_tableswitch : | |
1487 case Bytecodes::_lookupswitch : | |
1488 verify_switch( | |
1489 &bcs, code_length, code_data, ¤t_frame, | |
1490 &stackmap_table, CHECK_VERIFY(this)); | |
1491 no_control_flow = true; break; | |
1492 case Bytecodes::_ireturn : | |
1493 type = current_frame.pop_stack( | |
1494 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
6605 | 1495 verify_return_value(return_type, type, bci, |
1496 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1497 no_control_flow = true; break; |
1498 case Bytecodes::_lreturn : | |
1499 type2 = current_frame.pop_stack( | |
1500 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1501 type = current_frame.pop_stack( | |
1502 VerificationType::long_type(), CHECK_VERIFY(this)); | |
6605 | 1503 verify_return_value(return_type, type, bci, |
1504 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1505 no_control_flow = true; break; |
1506 case Bytecodes::_freturn : | |
1507 type = current_frame.pop_stack( | |
1508 VerificationType::float_type(), CHECK_VERIFY(this)); | |
6605 | 1509 verify_return_value(return_type, type, bci, |
1510 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1511 no_control_flow = true; break; |
1512 case Bytecodes::_dreturn : | |
1513 type2 = current_frame.pop_stack( | |
1514 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1515 type = current_frame.pop_stack( | |
1516 VerificationType::double_type(), CHECK_VERIFY(this)); | |
6605 | 1517 verify_return_value(return_type, type, bci, |
1518 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1519 no_control_flow = true; break; |
1520 case Bytecodes::_areturn : | |
1521 type = current_frame.pop_stack( | |
1522 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
6605 | 1523 verify_return_value(return_type, type, bci, |
1524 ¤t_frame, CHECK_VERIFY(this)); | |
0 | 1525 no_control_flow = true; break; |
1526 case Bytecodes::_return : | |
1527 if (return_type != VerificationType::bogus_type()) { | |
6605 | 1528 verify_error(ErrorContext::bad_code(bci), |
1529 "Method expects a return value"); | |
0 | 1530 return; |
1531 } | |
1532 // Make sure "this" has been initialized if current method is an | |
1533 // <init> | |
1534 if (_method->name() == vmSymbols::object_initializer_name() && | |
1535 current_frame.flag_this_uninit()) { | |
6605 | 1536 verify_error(ErrorContext::bad_code(bci), |
1537 "Constructor must call super() or this() " | |
1538 "before return"); | |
0 | 1539 return; |
1540 } | |
1541 no_control_flow = true; break; | |
1542 case Bytecodes::_getstatic : | |
1543 case Bytecodes::_putstatic : | |
1544 case Bytecodes::_getfield : | |
1545 case Bytecodes::_putfield : | |
1546 verify_field_instructions( | |
1547 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1548 no_control_flow = false; break; | |
1549 case Bytecodes::_invokevirtual : | |
1550 case Bytecodes::_invokespecial : | |
1551 case Bytecodes::_invokestatic : | |
1552 verify_invoke_instructions( | |
1553 &bcs, code_length, ¤t_frame, | |
1554 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1555 no_control_flow = false; break; | |
1556 case Bytecodes::_invokeinterface : | |
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1557 case Bytecodes::_invokedynamic : |
0 | 1558 verify_invoke_instructions( |
1559 &bcs, code_length, ¤t_frame, | |
1560 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1561 no_control_flow = false; break; | |
1562 case Bytecodes::_new : | |
1563 { | |
1565 | 1564 index = bcs.get_index_u2(); |
6605 | 1565 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
0 | 1566 VerificationType new_class_type = |
1567 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1568 if (!new_class_type.is_object()) { | |
6605 | 1569 verify_error(ErrorContext::bad_type(bci, |
1570 TypeOrigin::cp(index, new_class_type)), | |
1571 "Illegal new instruction"); | |
0 | 1572 return; |
1573 } | |
1574 type = VerificationType::uninitialized_type(bci); | |
1575 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1576 no_control_flow = false; break; | |
1577 } | |
1578 case Bytecodes::_newarray : | |
1579 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1580 current_frame.pop_stack( | |
1581 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1582 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1583 no_control_flow = false; break; | |
1584 case Bytecodes::_anewarray : | |
1585 verify_anewarray( | |
6605 | 1586 bci, bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1587 no_control_flow = false; break; |
1588 case Bytecodes::_arraylength : | |
1589 type = current_frame.pop_stack( | |
1590 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1591 if (!(type.is_null() || type.is_array())) { |
6605 | 1592 verify_error(ErrorContext::bad_type( |
1593 bci, current_frame.stack_top_ctx()), | |
1594 bad_type_msg, "arraylength"); | |
0 | 1595 } |
1596 current_frame.push_stack( | |
1597 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1598 no_control_flow = false; break; | |
1599 case Bytecodes::_checkcast : | |
1600 { | |
1565 | 1601 index = bcs.get_index_u2(); |
6605 | 1602 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
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1603 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1604 VerificationType klass_type = cp_index_to_type( |
1605 index, cp, CHECK_VERIFY(this)); | |
1606 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1607 no_control_flow = false; break; | |
1608 } | |
1609 case Bytecodes::_instanceof : { | |
1565 | 1610 index = bcs.get_index_u2(); |
6605 | 1611 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
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1612 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1613 current_frame.push_stack( |
1614 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1615 no_control_flow = false; break; | |
1616 } | |
1617 case Bytecodes::_monitorenter : | |
1618 case Bytecodes::_monitorexit : | |
1619 current_frame.pop_stack( | |
1620 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1621 no_control_flow = false; break; | |
1622 case Bytecodes::_multianewarray : | |
1623 { | |
1565 | 1624 index = bcs.get_index_u2(); |
0 | 1625 u2 dim = *(bcs.bcp()+3); |
6605 | 1626 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); |
0 | 1627 VerificationType new_array_type = |
1628 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1629 if (!new_array_type.is_array()) { | |
6605 | 1630 verify_error(ErrorContext::bad_type(bci, |
1631 TypeOrigin::cp(index, new_array_type)), | |
1632 "Illegal constant pool index in multianewarray instruction"); | |
0 | 1633 return; |
1634 } | |
1635 if (dim < 1 || new_array_type.dimensions() < dim) { | |
6605 | 1636 verify_error(ErrorContext::bad_code(bci), |
1637 "Illegal dimension in multianewarray instruction: %d", dim); | |
0 | 1638 return; |
1639 } | |
1640 for (int i = 0; i < dim; i++) { | |
1641 current_frame.pop_stack( | |
1642 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1643 } | |
1644 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1645 no_control_flow = false; break; | |
1646 } | |
1647 case Bytecodes::_athrow : | |
1648 type = VerificationType::reference_type( | |
1649 vmSymbols::java_lang_Throwable()); | |
1650 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1651 no_control_flow = true; break; | |
1652 default: | |
1653 // We only need to check the valid bytecodes in class file. | |
1654 // And jsr and ret are not in the new class file format in JDK1.5. | |
6605 | 1655 verify_error(ErrorContext::bad_code(bci), |
1656 "Bad instruction: %02x", opcode); | |
0 | 1657 no_control_flow = false; |
1658 return; | |
1659 } // end switch | |
1660 } // end Merge with the next instruction | |
1661 | |
1662 // Look for possible jump target in exception handlers and see if it | |
1663 // matches current_frame | |
1664 if (bci >= ex_min && bci < ex_max) { | |
1665 verify_exception_handler_targets( | |
1666 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1667 } | |
1668 } // end while | |
1669 | |
1670 // Make sure that control flow does not fall through end of the method | |
1671 if (!no_control_flow) { | |
6605 | 1672 verify_error(ErrorContext::bad_code(code_length), |
1673 "Control flow falls through code end"); | |
0 | 1674 return; |
1675 } | |
1676 } | |
1677 | |
1678 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1679 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1680 memset(code_data, 0, sizeof(char) * code_length); | |
1681 RawBytecodeStream bcs(m); | |
1682 | |
1683 while (!bcs.is_last_bytecode()) { | |
1684 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1685 int bci = bcs.bci(); | |
1565 | 1686 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1687 code_data[bci] = NEW_OFFSET; |
1688 } else { | |
1689 code_data[bci] = BYTECODE_OFFSET; | |
1690 } | |
1691 } else { | |
6605 | 1692 verify_error(ErrorContext::bad_code(bcs.bci()), "Bad instruction"); |
0 | 1693 return NULL; |
1694 } | |
1695 } | |
1696 | |
1697 return code_data; | |
1698 } | |
1699 | |
1700 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
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1701 ExceptionTable exhandlers(_method()); |
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1702 int exlength = exhandlers.length(); |
0 | 1703 constantPoolHandle cp (THREAD, _method->constants()); |
1704 | |
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1705 for(int i = 0; i < exlength; i++) { |
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1706 //reacquire the table in case a GC happened |
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1707 ExceptionTable exhandlers(_method()); |
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1708 u2 start_pc = exhandlers.start_pc(i); |
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1709 u2 end_pc = exhandlers.end_pc(i); |
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1710 u2 handler_pc = exhandlers.handler_pc(i); |
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1711 if (start_pc >= code_length || code_data[start_pc] == 0) { |
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1712 class_format_error("Illegal exception table start_pc %d", start_pc); |
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1713 return; |
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|
1714 } |
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1715 if (end_pc != code_length) { // special case: end_pc == code_length |
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1716 if (end_pc > code_length || code_data[end_pc] == 0) { |
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1717 class_format_error("Illegal exception table end_pc %d", end_pc); |
0 | 1718 return; |
1719 } | |
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1720 } |
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1721 if (handler_pc >= code_length || code_data[handler_pc] == 0) { |
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1722 class_format_error("Illegal exception table handler_pc %d", handler_pc); |
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1723 return; |
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|
1724 } |
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1725 int catch_type_index = exhandlers.catch_type_index(i); |
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1726 if (catch_type_index != 0) { |
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1727 VerificationType catch_type = cp_index_to_type( |
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1728 catch_type_index, cp, CHECK_VERIFY(this)); |
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1729 VerificationType throwable = |
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1730 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
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1731 bool is_subclass = throwable.is_assignable_from( |
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1732 catch_type, this, CHECK_VERIFY(this)); |
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1733 if (!is_subclass) { |
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1734 // 4286534: should throw VerifyError according to recent spec change |
6605 | 1735 verify_error(ErrorContext::bad_type(handler_pc, |
1736 TypeOrigin::cp(catch_type_index, catch_type), | |
1737 TypeOrigin::implicit(throwable)), | |
1738 "Catch type is not a subclass " | |
1739 "of Throwable in exception handler %d", handler_pc); | |
0 | 1740 return; |
1741 } | |
1742 } | |
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1743 if (start_pc < min) min = start_pc; |
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1744 if (end_pc > max) max = end_pc; |
0 | 1745 } |
1746 } | |
1747 | |
1748 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1749 int localvariable_table_length = _method()->localvariable_table_length(); | |
1750 if (localvariable_table_length > 0) { | |
1751 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1752 for (int i = 0; i < localvariable_table_length; i++) { | |
1753 u2 start_bci = table[i].start_bci; | |
1754 u2 length = table[i].length; | |
1755 | |
1756 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1757 class_format_error( | |
1758 "Illegal local variable table start_pc %d", start_bci); | |
1759 return; | |
1760 } | |
1761 u4 end_bci = (u4)(start_bci + length); | |
1762 if (end_bci != code_length) { | |
1763 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1764 class_format_error( "Illegal local variable table length %d", length); | |
1765 return; | |
1766 } | |
1767 } | |
1768 } | |
1769 } | |
1770 } | |
1771 | |
1772 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1773 StackMapFrame* current_frame, | |
1774 StackMapTable* stackmap_table, | |
1775 bool no_control_flow, TRAPS) { | |
1776 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1777 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1778 if (no_control_flow && this_offset > bci) { | |
6605 | 1779 verify_error(ErrorContext::missing_stackmap(bci), |
1780 "Expecting a stack map frame"); | |
0 | 1781 return 0; |
1782 } | |
1783 if (this_offset == bci) { | |
6605 | 1784 ErrorContext ctx; |
0 | 1785 // See if current stack map can be assigned to the frame in table. |
1786 // current_frame is the stackmap frame got from the last instruction. | |
1787 // If matched, current_frame will be updated by this method. | |
6605 | 1788 bool matches = stackmap_table->match_stackmap( |
0 | 1789 current_frame, this_offset, stackmap_index, |
6605 | 1790 !no_control_flow, true, &ctx, CHECK_VERIFY_(this, 0)); |
1791 if (!matches) { | |
0 | 1792 // report type error |
6605 | 1793 verify_error(ctx, "Instruction type does not match stack map"); |
0 | 1794 return 0; |
1795 } | |
1796 stackmap_index++; | |
1797 } else if (this_offset < bci) { | |
1798 // current_offset should have met this_offset. | |
1799 class_format_error("Bad stack map offset %d", this_offset); | |
1800 return 0; | |
1801 } | |
1802 } else if (no_control_flow) { | |
6605 | 1803 verify_error(ErrorContext::bad_code(bci), "Expecting a stack map frame"); |
0 | 1804 return 0; |
1805 } | |
1806 return stackmap_index; | |
1807 } | |
1808 | |
1809 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1810 StackMapTable* stackmap_table, TRAPS) { | |
1811 constantPoolHandle cp (THREAD, _method->constants()); | |
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1812 ExceptionTable exhandlers(_method()); |
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1813 int exlength = exhandlers.length(); |
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1814 for(int i = 0; i < exlength; i++) { |
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1815 //reacquire the table in case a GC happened |
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1816 ExceptionTable exhandlers(_method()); |
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1817 u2 start_pc = exhandlers.start_pc(i); |
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1818 u2 end_pc = exhandlers.end_pc(i); |
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1819 u2 handler_pc = exhandlers.handler_pc(i); |
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1820 int catch_type_index = exhandlers.catch_type_index(i); |
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1821 if(bci >= start_pc && bci < end_pc) { |
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1822 u1 flags = current_frame->flags(); |
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1823 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } |
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1824 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); |
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1825 if (catch_type_index != 0) { |
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1826 // We know that this index refers to a subclass of Throwable |
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1827 VerificationType catch_type = cp_index_to_type( |
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1828 catch_type_index, cp, CHECK_VERIFY(this)); |
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1829 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); |
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1830 } else { |
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1831 VerificationType throwable = |
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1832 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); |
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1833 new_frame->push_stack(throwable, CHECK_VERIFY(this)); |
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1834 } |
6605 | 1835 ErrorContext ctx; |
1836 bool matches = stackmap_table->match_stackmap( | |
1837 new_frame, handler_pc, true, false, &ctx, CHECK_VERIFY(this)); | |
1838 if (!matches) { | |
1839 verify_error(ctx, "Stack map does not match the one at " | |
1840 "exception handler %d", handler_pc); | |
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1841 return; |
0 | 1842 } |
1843 } | |
1844 } | |
1845 } | |
1846 | |
6605 | 1847 void ClassVerifier::verify_cp_index( |
1848 u2 bci, constantPoolHandle cp, int index, TRAPS) { | |
0 | 1849 int nconstants = cp->length(); |
1850 if ((index <= 0) || (index >= nconstants)) { | |
6605 | 1851 verify_error(ErrorContext::bad_cp_index(bci, index), |
1852 "Illegal constant pool index %d in class %s", | |
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1853 index, cp->pool_holder()->external_name()); |
0 | 1854 return; |
1855 } | |
1856 } | |
1857 | |
1858 void ClassVerifier::verify_cp_type( | |
6605 | 1859 u2 bci, int index, constantPoolHandle cp, unsigned int types, TRAPS) { |
0 | 1860 |
1861 // In some situations, bytecode rewriting may occur while we're verifying. | |
1862 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1863 // instead. Be sure we don't pick up such indices by accident. |
1864 // We must check was_recursively_verified() before we get here. | |
1865 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1866 |
6605 | 1867 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); |
0 | 1868 unsigned int tag = cp->tag_at(index).value(); |
1869 if ((types & (1 << tag)) == 0) { | |
6605 | 1870 verify_error(ErrorContext::bad_cp_index(bci, index), |
0 | 1871 "Illegal type at constant pool entry %d in class %s", |
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1872 index, cp->pool_holder()->external_name()); |
0 | 1873 return; |
1874 } | |
1875 } | |
1876 | |
1877 void ClassVerifier::verify_cp_class_type( | |
6605 | 1878 u2 bci, int index, constantPoolHandle cp, TRAPS) { |
1879 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); | |
0 | 1880 constantTag tag = cp->tag_at(index); |
1881 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
6605 | 1882 verify_error(ErrorContext::bad_cp_index(bci, index), |
1883 "Illegal type at constant pool entry %d in class %s", | |
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1884 index, cp->pool_holder()->external_name()); |
0 | 1885 return; |
1886 } | |
1887 } | |
1888 | |
6605 | 1889 void ClassVerifier::verify_error(ErrorContext ctx, const char* msg, ...) { |
1890 stringStream ss; | |
0 | 1891 |
6605 | 1892 ctx.reset_frames(); |
0 | 1893 _exception_type = vmSymbols::java_lang_VerifyError(); |
6605 | 1894 _error_context = ctx; |
0 | 1895 va_list va; |
6605 | 1896 va_start(va, msg); |
1897 ss.vprint(msg, va); | |
0 | 1898 va_end(va); |
6605 | 1899 _message = ss.as_string(); |
1900 #ifdef ASSERT | |
1901 ResourceMark rm; | |
1902 const char* exception_name = _exception_type->as_C_string(); | |
1903 Exceptions::debug_check_abort(exception_name, NULL); | |
1904 #endif // ndef ASSERT | |
0 | 1905 } |
1906 | |
1907 void ClassVerifier::class_format_error(const char* msg, ...) { | |
6605 | 1908 stringStream ss; |
0 | 1909 _exception_type = vmSymbols::java_lang_ClassFormatError(); |
1910 va_list va; | |
1911 va_start(va, msg); | |
6605 | 1912 ss.vprint(msg, va); |
0 | 1913 va_end(va); |
6605 | 1914 if (!_method.is_null()) { |
1915 ss.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1916 } | |
1917 _message = ss.as_string(); | |
0 | 1918 } |
1919 | |
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1920 Klass* ClassVerifier::load_class(Symbol* name, TRAPS) { |
0 | 1921 // Get current loader and protection domain first. |
1922 oop loader = current_class()->class_loader(); | |
1923 oop protection_domain = current_class()->protection_domain(); | |
1924 | |
1925 return SystemDictionary::resolve_or_fail( | |
1926 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1927 true, CHECK_NULL); | |
1928 } | |
1929 | |
1930 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
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1931 Klass* target_class, |
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1932 Symbol* field_name, |
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1933 Symbol* field_sig, |
0 | 1934 bool is_method) { |
1935 No_Safepoint_Verifier nosafepoint; | |
1936 | |
1937 // If target class isn't a super class of this class, we don't worry about this case | |
1938 if (!this_class->is_subclass_of(target_class)) { | |
1939 return false; | |
1940 } | |
1941 // Check if the specified method or field is protected | |
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1942 InstanceKlass* target_instance = InstanceKlass::cast(target_class); |
0 | 1943 fieldDescriptor fd; |
1944 if (is_method) { | |
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1945 Method* m = target_instance->uncached_lookup_method(field_name, field_sig); |
0 | 1946 if (m != NULL && m->is_protected()) { |
1947 if (!this_class->is_same_class_package(m->method_holder())) { | |
1948 return true; | |
1949 } | |
1950 } | |
1951 } else { | |
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1952 Klass* member_klass = target_instance->find_field(field_name, field_sig, &fd); |
6605 | 1953 if (member_klass != NULL && fd.is_protected()) { |
0 | 1954 if (!this_class->is_same_class_package(member_klass)) { |
1955 return true; | |
1956 } | |
1957 } | |
1958 } | |
1959 return false; | |
1960 } | |
1961 | |
1962 void ClassVerifier::verify_ldc( | |
6605 | 1963 int opcode, u2 index, StackMapFrame* current_frame, |
1964 constantPoolHandle cp, u2 bci, TRAPS) { | |
1965 verify_cp_index(bci, cp, index, CHECK_VERIFY(this)); | |
0 | 1966 constantTag tag = cp->tag_at(index); |
1967 unsigned int types; | |
1968 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
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1969 if (!tag.is_unresolved_klass()) { |
0 | 1970 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) |
1602 | 1971 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1972 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1973 // Note: The class file parser already verified the legality of | |
1974 // MethodHandle and MethodType constants. | |
6605 | 1975 verify_cp_type(bci, index, cp, types, CHECK_VERIFY(this)); |
0 | 1976 } |
1977 } else { | |
1978 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1979 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
6605 | 1980 verify_cp_type(bci, index, cp, types, CHECK_VERIFY(this)); |
0 | 1981 } |
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1982 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1983 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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1984 } else if (tag.is_string()) { |
0 | 1985 current_frame->push_stack( |
1986 VerificationType::reference_type( | |
1987 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1988 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1989 current_frame->push_stack( | |
1990 VerificationType::reference_type( | |
1991 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1992 } else if (tag.is_int()) { | |
1993 current_frame->push_stack( | |
1994 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1995 } else if (tag.is_float()) { | |
1996 current_frame->push_stack( | |
1997 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1998 } else if (tag.is_double()) { | |
1999 current_frame->push_stack_2( | |
2000 VerificationType::double_type(), | |
2001 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2002 } else if (tag.is_long()) { | |
2003 current_frame->push_stack_2( | |
2004 VerificationType::long_type(), | |
2005 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 2006 } else if (tag.is_method_handle()) { |
2007 current_frame->push_stack( | |
2008 VerificationType::reference_type( | |
2460 | 2009 vmSymbols::java_lang_invoke_MethodHandle()), CHECK_VERIFY(this)); |
1602 | 2010 } else if (tag.is_method_type()) { |
2011 current_frame->push_stack( | |
2012 VerificationType::reference_type( | |
2460 | 2013 vmSymbols::java_lang_invoke_MethodType()), CHECK_VERIFY(this)); |
0 | 2014 } else { |
6605 | 2015 /* Unreachable? verify_cp_type has already validated the cp type. */ |
2016 verify_error( | |
2017 ErrorContext::bad_cp_index(bci, index), "Invalid index in ldc"); | |
0 | 2018 return; |
2019 } | |
2020 } | |
2021 | |
2022 void ClassVerifier::verify_switch( | |
2023 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
2024 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
2025 int bci = bcs->bci(); | |
2026 address bcp = bcs->bcp(); | |
2027 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
2028 | |
2029 // 4639449 & 4647081: padding bytes must be 0 | |
2030 u2 padding_offset = 1; | |
2031 while ((bcp + padding_offset) < aligned_bcp) { | |
2032 if(*(bcp + padding_offset) != 0) { | |
6605 | 2033 verify_error(ErrorContext::bad_code(bci), |
2034 "Nonzero padding byte in lookswitch or tableswitch"); | |
0 | 2035 return; |
2036 } | |
2037 padding_offset++; | |
2038 } | |
2039 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
2040 int keys, delta; | |
2041 current_frame->pop_stack( | |
2042 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 2043 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 2044 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
2045 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
2046 if (low > high) { | |
6605 | 2047 verify_error(ErrorContext::bad_code(bci), |
2048 "low must be less than or equal to high in tableswitch"); | |
0 | 2049 return; |
2050 } | |
2051 keys = high - low + 1; | |
2052 if (keys < 0) { | |
6605 | 2053 verify_error(ErrorContext::bad_code(bci), "too many keys in tableswitch"); |
0 | 2054 return; |
2055 } | |
2056 delta = 1; | |
2057 } else { | |
2058 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
2059 if (keys < 0) { | |
6605 | 2060 verify_error(ErrorContext::bad_code(bci), |
2061 "number of keys in lookupswitch less than 0"); | |
0 | 2062 return; |
2063 } | |
2064 delta = 2; | |
2065 // Make sure that the lookupswitch items are sorted | |
2066 for (int i = 0; i < (keys - 1); i++) { | |
2067 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
2068 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
2069 if (this_key >= next_key) { | |
6605 | 2070 verify_error(ErrorContext::bad_code(bci), |
2071 "Bad lookupswitch instruction"); | |
0 | 2072 return; |
2073 } | |
2074 } | |
2075 } | |
2076 int target = bci + default_offset; | |
2077 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
2078 for (int i = 0; i < keys; i++) { | |
6118 | 2079 // Because check_jump_target() may safepoint, the bytecode could have |
2080 // moved, which means 'aligned_bcp' is no good and needs to be recalculated. | |
2081 aligned_bcp = (address)round_to((intptr_t)(bcs->bcp() + 1), jintSize); | |
0 | 2082 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); |
2083 stackmap_table->check_jump_target( | |
2084 current_frame, target, CHECK_VERIFY(this)); | |
2085 } | |
6118 | 2086 NOT_PRODUCT(aligned_bcp = NULL); // no longer valid at this point |
0 | 2087 } |
2088 | |
2089 bool ClassVerifier::name_in_supers( | |
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2090 Symbol* ref_name, instanceKlassHandle current) { |
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2091 Klass* super = current->super(); |
0 | 2092 while (super != NULL) { |
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2093 if (super->name() == ref_name) { |
0 | 2094 return true; |
2095 } | |
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2096 super = super->super(); |
0 | 2097 } |
2098 return false; | |
2099 } | |
2100 | |
2101 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
2102 StackMapFrame* current_frame, | |
2103 constantPoolHandle cp, | |
2104 TRAPS) { | |
1565 | 2105 u2 index = bcs->get_index_u2(); |
6605 | 2106 verify_cp_type(bcs->bci(), index, cp, |
2107 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); | |
0 | 2108 |
2109 // Get field name and signature | |
2177
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2110 Symbol* field_name = cp->name_ref_at(index); |
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2111 Symbol* field_sig = cp->signature_ref_at(index); |
0 | 2112 |
2113 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
2114 class_format_error( | |
2115 "Invalid signature for field in class %s referenced " | |
2116 "from constant pool index %d", _klass->external_name(), index); | |
2117 return; | |
2118 } | |
2119 | |
2120 // Get referenced class type | |
2121 VerificationType ref_class_type = cp_ref_index_to_type( | |
2122 index, cp, CHECK_VERIFY(this)); | |
2123 if (!ref_class_type.is_object()) { | |
6605 | 2124 /* Unreachable? Class file parser verifies Fieldref contents */ |
2125 verify_error(ErrorContext::bad_type(bcs->bci(), | |
2126 TypeOrigin::cp(index, ref_class_type)), | |
2127 "Expecting reference to class in class %s at constant pool index %d", | |
2128 _klass->external_name(), index); | |
0 | 2129 return; |
2130 } | |
2131 VerificationType target_class_type = ref_class_type; | |
2132 | |
2133 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
2134 "buffer type must match VerificationType size"); | |
2135 uintptr_t field_type_buffer[2]; | |
2136 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
2137 // If we make a VerificationType[2] array directly, the compiler calls | |
2138 // to the c-runtime library to do the allocation instead of just | |
2139 // stack allocating it. Plus it would run constructors. This shows up | |
2140 // in performance profiles. | |
2141 | |
2142 SignatureStream sig_stream(field_sig, false); | |
2143 VerificationType stack_object_type; | |
2144 int n = change_sig_to_verificationType( | |
2145 &sig_stream, field_type, CHECK_VERIFY(this)); | |
2146 u2 bci = bcs->bci(); | |
2147 bool is_assignable; | |
1565 | 2148 switch (bcs->raw_code()) { |
0 | 2149 case Bytecodes::_getstatic: { |
2150 for (int i = 0; i < n; i++) { | |
2151 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
2152 } | |
2153 break; | |
2154 } | |
2155 case Bytecodes::_putstatic: { | |
2156 for (int i = n - 1; i >= 0; i--) { | |
2157 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
2158 } | |
2159 break; | |
2160 } | |
2161 case Bytecodes::_getfield: { | |
2162 stack_object_type = current_frame->pop_stack( | |
2163 target_class_type, CHECK_VERIFY(this)); | |
2164 for (int i = 0; i < n; i++) { | |
2165 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
2166 } | |
2167 goto check_protected; | |
2168 } | |
2169 case Bytecodes::_putfield: { | |
2170 for (int i = n - 1; i >= 0; i--) { | |
2171 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
2172 } | |
2173 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
2174 | |
2175 // The JVMS 2nd edition allows field initialization before the superclass | |
2176 // initializer, if the field is defined within the current class. | |
2177 fieldDescriptor fd; | |
2178 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
2179 target_class_type.equals(current_type()) && | |
2177
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2180 _klass->find_local_field(field_name, field_sig, &fd)) { |
0 | 2181 stack_object_type = current_type(); |
2182 } | |
2183 is_assignable = target_class_type.is_assignable_from( | |
2177
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2184 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2185 if (!is_assignable) { |
6605 | 2186 verify_error(ErrorContext::bad_type(bci, |
2187 current_frame->stack_top_ctx(), | |
2188 TypeOrigin::cp(index, target_class_type)), | |
2189 "Bad type on operand stack in putfield"); | |
0 | 2190 return; |
2191 } | |
2192 } | |
2193 check_protected: { | |
2194 if (_this_type == stack_object_type) | |
2195 break; // stack_object_type must be assignable to _current_class_type | |
2177
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2196 Symbol* ref_class_name = |
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2197 cp->klass_name_at(cp->klass_ref_index_at(index)); |
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2198 if (!name_in_supers(ref_class_name, current_class())) |
0 | 2199 // stack_object_type must be assignable to _current_class_type since: |
2200 // 1. stack_object_type must be assignable to ref_class. | |
2201 // 2. ref_class must be _current_class or a subclass of it. It can't | |
2202 // be a superclass of it. See revised JVMS 5.4.4. | |
2203 break; | |
2204 | |
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2205 Klass* ref_class_oop = load_class(ref_class_name, CHECK); |
2177
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2206 if (is_protected_access(current_class(), ref_class_oop, field_name, |
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2207 field_sig, false)) { |
0 | 2208 // It's protected access, check if stack object is assignable to |
2209 // current class. | |
2210 is_assignable = current_type().is_assignable_from( | |
2177
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2211 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2212 if (!is_assignable) { |
6605 | 2213 verify_error(ErrorContext::bad_type(bci, |
2214 current_frame->stack_top_ctx(), | |
2215 TypeOrigin::implicit(current_type())), | |
2216 "Bad access to protected data in getfield"); | |
0 | 2217 return; |
2218 } | |
2219 } | |
2220 break; | |
2221 } | |
2222 default: ShouldNotReachHere(); | |
2223 } | |
2224 } | |
2225 | |
2226 void ClassVerifier::verify_invoke_init( | |
6605 | 2227 RawBytecodeStream* bcs, u2 ref_class_index, VerificationType ref_class_type, |
0 | 2228 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, |
2229 constantPoolHandle cp, TRAPS) { | |
2230 u2 bci = bcs->bci(); | |
2231 VerificationType type = current_frame->pop_stack( | |
2232 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2233 if (type == VerificationType::uninitialized_this_type()) { | |
6155 | 2234 // The method must be an <init> method of this class or its superclass |
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2235 Klass* superk = current_class()->super(); |
1677 | 2236 if (ref_class_type.name() != current_class()->name() && |
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2237 ref_class_type.name() != superk->name()) { |
6605 | 2238 verify_error(ErrorContext::bad_type(bci, |
2239 TypeOrigin::implicit(ref_class_type), | |
2240 TypeOrigin::implicit(current_type())), | |
2241 "Bad <init> method call"); | |
0 | 2242 return; |
2243 } | |
2244 current_frame->initialize_object(type, current_type()); | |
2245 *this_uninit = true; | |
2246 } else if (type.is_uninitialized()) { | |
2247 u2 new_offset = type.bci(); | |
2248 address new_bcp = bcs->bcp() - bci + new_offset; | |
2249 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
6605 | 2250 /* Unreachable? Stack map parsing ensures valid type and new |
2251 * instructions have a valid BCI. */ | |
2252 verify_error(ErrorContext::bad_code(new_offset), | |
2253 "Expecting new instruction"); | |
0 | 2254 return; |
2255 } | |
2256 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
6605 | 2257 verify_cp_class_type(bci, new_class_index, cp, CHECK_VERIFY(this)); |
0 | 2258 |
2259 // The method must be an <init> method of the indicated class | |
2260 VerificationType new_class_type = cp_index_to_type( | |
2261 new_class_index, cp, CHECK_VERIFY(this)); | |
2262 if (!new_class_type.equals(ref_class_type)) { | |
6605 | 2263 verify_error(ErrorContext::bad_type(bci, |
2264 TypeOrigin::cp(new_class_index, new_class_type), | |
2265 TypeOrigin::cp(ref_class_index, ref_class_type)), | |
2266 "Call to wrong <init> method"); | |
0 | 2267 return; |
2268 } | |
2269 // According to the VM spec, if the referent class is a superclass of the | |
2270 // current class, and is in a different runtime package, and the method is | |
2271 // protected, then the objectref must be the current class or a subclass | |
2272 // of the current class. | |
2273 VerificationType objectref_type = new_class_type; | |
2274 if (name_in_supers(ref_class_type.name(), current_class())) { | |
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2275 Klass* ref_klass = load_class( |
0 | 2276 ref_class_type.name(), CHECK_VERIFY(this)); |
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2277 Method* m = InstanceKlass::cast(ref_klass)->uncached_lookup_method( |
0 | 2278 vmSymbols::object_initializer_name(), |
1565 | 2279 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 2280 instanceKlassHandle mh(THREAD, m->method_holder()); |
2281 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
2282 bool assignable = current_type().is_assignable_from( | |
2177
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2283 objectref_type, this, CHECK_VERIFY(this)); |
0 | 2284 if (!assignable) { |
6605 | 2285 verify_error(ErrorContext::bad_type(bci, |
2286 TypeOrigin::cp(new_class_index, objectref_type), | |
2287 TypeOrigin::implicit(current_type())), | |
2288 "Bad access to protected <init> method"); | |
0 | 2289 return; |
2290 } | |
2291 } | |
2292 } | |
2293 current_frame->initialize_object(type, new_class_type); | |
2294 } else { | |
6605 | 2295 verify_error(ErrorContext::bad_type(bci, current_frame->stack_top_ctx()), |
2296 "Bad operand type when invoking <init>"); | |
0 | 2297 return; |
2298 } | |
2299 } | |
2300 | |
2301 void ClassVerifier::verify_invoke_instructions( | |
2302 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
2303 bool *this_uninit, VerificationType return_type, | |
2304 constantPoolHandle cp, TRAPS) { | |
2305 // Make sure the constant pool item is the right type | |
1565 | 2306 u2 index = bcs->get_index_u2(); |
2307 Bytecodes::Code opcode = bcs->raw_code(); | |
6934 | 2308 unsigned int types; |
2309 switch (opcode) { | |
2310 case Bytecodes::_invokeinterface: | |
2311 types = 1 << JVM_CONSTANT_InterfaceMethodref; | |
2312 break; | |
2313 case Bytecodes::_invokedynamic: | |
2314 types = 1 << JVM_CONSTANT_InvokeDynamic; | |
2315 break; | |
2316 case Bytecodes::_invokespecial: | |
2317 types = (1 << JVM_CONSTANT_InterfaceMethodref) | | |
2318 (1 << JVM_CONSTANT_Methodref); | |
2319 break; | |
2320 default: | |
2321 types = 1 << JVM_CONSTANT_Methodref; | |
2322 } | |
6605 | 2323 verify_cp_type(bcs->bci(), index, cp, types, CHECK_VERIFY(this)); |
0 | 2324 |
2325 // Get method name and signature | |
2177
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2326 Symbol* method_name = cp->name_ref_at(index); |
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diff
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|
2327 Symbol* method_sig = cp->signature_ref_at(index); |
0 | 2328 |
2329 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
2330 class_format_error( | |
2331 "Invalid method signature in class %s referenced " | |
2332 "from constant pool index %d", _klass->external_name(), index); | |
2333 return; | |
2334 } | |
2335 | |
2336 // Get referenced class type | |
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diff
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|
2337 VerificationType ref_class_type; |
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|
2338 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 2339 if (!EnableInvokeDynamic || |
2340 _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
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|
2341 class_format_error( |
1602 | 2342 (!EnableInvokeDynamic ? |
2343 "invokedynamic instructions not enabled in this JVM" : | |
2344 "invokedynamic instructions not supported by this class file version"), | |
726
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diff
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|
2345 _klass->external_name()); |
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6655646: dynamic languages need dynamically linked call sites
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diff
changeset
|
2346 return; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
431
diff
changeset
|
2347 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
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diff
changeset
|
2348 } else { |
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6655646: dynamic languages need dynamically linked call sites
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diff
changeset
|
2349 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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|
2350 } |
0 | 2351 |
2352 // For a small signature length, we just allocate 128 bytes instead | |
2353 // of parsing the signature once to find its size. | |
2354 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
2355 // longs/doubles to be consertive. | |
2356 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
2357 "buffer type must match VerificationType size"); | |
2358 uintptr_t on_stack_sig_types_buffer[128]; | |
2359 // If we make a VerificationType[128] array directly, the compiler calls | |
2360 // to the c-runtime library to do the allocation instead of just | |
2361 // stack allocating it. Plus it would run constructors. This shows up | |
2362 // in performance profiles. | |
2363 | |
2364 VerificationType* sig_types; | |
2365 int size = (method_sig->utf8_length() - 3) * 2; | |
2366 if (size > 128) { | |
2367 // Long and double occupies two slots here. | |
2368 ArgumentSizeComputer size_it(method_sig); | |
2369 size = size_it.size(); | |
2370 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
2371 } else{ | |
2372 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
2373 } | |
2374 SignatureStream sig_stream(method_sig); | |
2375 int sig_i = 0; | |
2376 while (!sig_stream.at_return_type()) { | |
2377 sig_i += change_sig_to_verificationType( | |
2378 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
2379 sig_stream.next(); | |
2380 } | |
2381 int nargs = sig_i; | |
2382 | |
2383 #ifdef ASSERT | |
2384 { | |
2385 ArgumentSizeComputer size_it(method_sig); | |
2386 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
2387 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
2388 } | |
2389 #endif | |
2390 | |
2391 // Check instruction operands | |
2392 u2 bci = bcs->bci(); | |
2393 if (opcode == Bytecodes::_invokeinterface) { | |
2394 address bcp = bcs->bcp(); | |
2395 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
2396 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
2397 // the difference between the size of the operand stack before and after the instruction | |
2398 // executes. | |
2399 if (*(bcp+3) != (nargs+1)) { | |
6605 | 2400 verify_error(ErrorContext::bad_code(bci), |
2401 "Inconsistent args count operand in invokeinterface"); | |
0 | 2402 return; |
2403 } | |
2404 if (*(bcp+4) != 0) { | |
6605 | 2405 verify_error(ErrorContext::bad_code(bci), |
2406 "Fourth operand byte of invokeinterface must be zero"); | |
0 | 2407 return; |
2408 } | |
2409 } | |
2410 | |
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diff
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|
2411 if (opcode == Bytecodes::_invokedynamic) { |
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|
2412 address bcp = bcs->bcp(); |
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diff
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|
2413 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
6605 | 2414 verify_error(ErrorContext::bad_code(bci), |
2415 "Third and fourth operand bytes of invokedynamic must be zero"); | |
726
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|
2416 return; |
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diff
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|
2417 } |
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diff
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|
2418 } |
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|
2419 |
0 | 2420 if (method_name->byte_at(0) == '<') { |
2421 // Make sure <init> can only be invoked by invokespecial | |
2422 if (opcode != Bytecodes::_invokespecial || | |
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diff
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2423 method_name != vmSymbols::object_initializer_name()) { |
6605 | 2424 verify_error(ErrorContext::bad_code(bci), |
2425 "Illegal call to internal method"); | |
0 | 2426 return; |
2427 } | |
2428 } else if (opcode == Bytecodes::_invokespecial | |
2429 && !ref_class_type.equals(current_type()) | |
2430 && !ref_class_type.equals(VerificationType::reference_type( | |
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2431 current_class()->super()->name()))) { |
0 | 2432 bool subtype = ref_class_type.is_assignable_from( |
2177
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diff
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|
2433 current_type(), this, CHECK_VERIFY(this)); |
0 | 2434 if (!subtype) { |
6605 | 2435 verify_error(ErrorContext::bad_code(bci), |
2436 "Bad invokespecial instruction: " | |
0 | 2437 "current class isn't assignable to reference class."); |
2438 return; | |
2439 } | |
2440 } | |
2441 // Match method descriptor with operand stack | |
2442 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2443 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2444 } | |
2445 // Check objectref on operand stack | |
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|
2446 if (opcode != Bytecodes::_invokestatic && |
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|
2447 opcode != Bytecodes::_invokedynamic) { |
2177
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2448 if (method_name == vmSymbols::object_initializer_name()) { // <init> method |
6605 | 2449 verify_invoke_init(bcs, index, ref_class_type, current_frame, |
0 | 2450 code_length, this_uninit, cp, CHECK_VERIFY(this)); |
2451 } else { // other methods | |
2452 // Ensures that target class is assignable to method class. | |
2453 if (opcode == Bytecodes::_invokespecial) { | |
2454 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2455 } else if (opcode == Bytecodes::_invokevirtual) { | |
2456 VerificationType stack_object_type = | |
2457 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2458 if (current_type() != stack_object_type) { | |
2459 assert(cp->cache() == NULL, "not rewritten yet"); | |
2177
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2460 Symbol* ref_class_name = |
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2461 cp->klass_name_at(cp->klass_ref_index_at(index)); |
0 | 2462 // See the comments in verify_field_instructions() for |
2463 // the rationale behind this. | |
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2464 if (name_in_supers(ref_class_name, current_class())) { |
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2465 Klass* ref_class = load_class(ref_class_name, CHECK); |
0 | 2466 if (is_protected_access( |
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2467 _klass, ref_class, method_name, method_sig, true)) { |
0 | 2468 // It's protected access, check if stack object is |
2469 // assignable to current class. | |
2470 bool is_assignable = current_type().is_assignable_from( | |
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2471 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2472 if (!is_assignable) { |
2473 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2474 && stack_object_type.is_array() | |
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2475 && method_name == vmSymbols::clone_name()) { |
0 | 2476 // Special case: arrays pretend to implement public Object |
2477 // clone(). | |
2478 } else { | |
6605 | 2479 verify_error(ErrorContext::bad_type(bci, |
2480 current_frame->stack_top_ctx(), | |
2481 TypeOrigin::implicit(current_type())), | |
2482 "Bad access to protected data in invokevirtual"); | |
0 | 2483 return; |
2484 } | |
2485 } | |
2486 } | |
2487 } | |
2488 } | |
2489 } else { | |
2490 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2491 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2492 } | |
2493 } | |
2494 } | |
2495 // Push the result type. | |
2496 if (sig_stream.type() != T_VOID) { | |
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2497 if (method_name == vmSymbols::object_initializer_name()) { |
0 | 2498 // <init> method must have a void return type |
6605 | 2499 /* Unreachable? Class file parser verifies that methods with '<' have |
2500 * void return */ | |
2501 verify_error(ErrorContext::bad_code(bci), | |
2502 "Return type must be void in <init> method"); | |
0 | 2503 return; |
2504 } | |
2505 VerificationType return_type[2]; | |
2506 int n = change_sig_to_verificationType( | |
2507 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2508 for (int i = 0; i < n; i++) { | |
2509 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2510 } | |
2511 } | |
2512 } | |
2513 | |
2514 VerificationType ClassVerifier::get_newarray_type( | |
2515 u2 index, u2 bci, TRAPS) { | |
2516 const char* from_bt[] = { | |
2517 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2518 }; | |
2519 if (index < T_BOOLEAN || index > T_LONG) { | |
6605 | 2520 verify_error(ErrorContext::bad_code(bci), "Illegal newarray instruction"); |
0 | 2521 return VerificationType::bogus_type(); |
2522 } | |
2523 | |
2524 // from_bt[index] contains the array signature which has a length of 2 | |
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2525 Symbol* sig = create_temporary_symbol( |
0 | 2526 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); |
2527 return VerificationType::reference_type(sig); | |
2528 } | |
2529 | |
2530 void ClassVerifier::verify_anewarray( | |
6605 | 2531 u2 bci, u2 index, constantPoolHandle cp, |
2532 StackMapFrame* current_frame, TRAPS) { | |
2533 verify_cp_class_type(bci, index, cp, CHECK_VERIFY(this)); | |
0 | 2534 current_frame->pop_stack( |
2535 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2536 | |
2537 VerificationType component_type = | |
2538 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2539 int length; | |
2540 char* arr_sig_str; | |
2541 if (component_type.is_array()) { // it's an array | |
2542 const char* component_name = component_type.name()->as_utf8(); | |
2543 // add one dimension to component | |
2544 length = (int)strlen(component_name) + 1; | |
2545 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2546 arr_sig_str[0] = '['; | |
2547 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2548 } else { // it's an object or interface | |
2549 const char* component_name = component_type.name()->as_utf8(); | |
2550 // add one dimension to component with 'L' prepended and ';' postpended. | |
2551 length = (int)strlen(component_name) + 3; | |
2552 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2553 arr_sig_str[0] = '['; | |
2554 arr_sig_str[1] = 'L'; | |
2555 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2556 arr_sig_str[length - 1] = ';'; | |
2557 } | |
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2558 Symbol* arr_sig = create_temporary_symbol( |
0 | 2559 arr_sig_str, length, CHECK_VERIFY(this)); |
2560 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2561 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2562 } | |
2563 | |
2564 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2565 current_frame->get_local( | |
2566 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2567 current_frame->push_stack( | |
2568 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2569 } | |
2570 | |
2571 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2572 current_frame->get_local_2( | |
2573 index, VerificationType::long_type(), | |
2574 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2575 current_frame->push_stack_2( | |
2576 VerificationType::long_type(), | |
2577 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2578 } | |
2579 | |
2580 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2581 current_frame->get_local( | |
2582 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2583 current_frame->push_stack( | |
2584 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2585 } | |
2586 | |
2587 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2588 current_frame->get_local_2( | |
2589 index, VerificationType::double_type(), | |
2590 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2591 current_frame->push_stack_2( | |
2592 VerificationType::double_type(), | |
2593 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2594 } | |
2595 | |
2596 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2597 VerificationType type = current_frame->get_local( | |
2598 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2599 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2600 } | |
2601 | |
2602 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2603 current_frame->pop_stack( | |
2604 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2605 current_frame->set_local( | |
2606 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2607 } | |
2608 | |
2609 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2610 current_frame->pop_stack_2( | |
2611 VerificationType::long2_type(), | |
2612 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2613 current_frame->set_local_2( | |
2614 index, VerificationType::long_type(), | |
2615 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2616 } | |
2617 | |
2618 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2619 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2620 current_frame->set_local( | |
2621 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2622 } | |
2623 | |
2624 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2625 current_frame->pop_stack_2( | |
2626 VerificationType::double2_type(), | |
2627 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2628 current_frame->set_local_2( | |
2629 index, VerificationType::double_type(), | |
2630 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2631 } | |
2632 | |
2633 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2634 VerificationType type = current_frame->pop_stack( | |
2635 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2636 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2637 } | |
2638 | |
2639 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2640 VerificationType type = current_frame->get_local( | |
2641 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2642 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2643 } | |
2644 | |
2645 void ClassVerifier::verify_return_value( | |
6605 | 2646 VerificationType return_type, VerificationType type, u2 bci, |
2647 StackMapFrame* current_frame, TRAPS) { | |
0 | 2648 if (return_type == VerificationType::bogus_type()) { |
6605 | 2649 verify_error(ErrorContext::bad_type(bci, |
2650 current_frame->stack_top_ctx(), TypeOrigin::signature(return_type)), | |
2651 "Method expects a return value"); | |
0 | 2652 return; |
2653 } | |
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2654 bool match = return_type.is_assignable_from(type, this, CHECK_VERIFY(this)); |
0 | 2655 if (!match) { |
6605 | 2656 verify_error(ErrorContext::bad_type(bci, |
2657 current_frame->stack_top_ctx(), TypeOrigin::signature(return_type)), | |
2658 "Bad return type"); | |
0 | 2659 return; |
2660 } | |
2661 } | |
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2662 |
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2663 // The verifier creates symbols which are substrings of Symbols. |
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2664 // These are stored in the verifier until the end of verification so that |
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2665 // they can be reference counted. |
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2666 Symbol* ClassVerifier::create_temporary_symbol(const Symbol *s, int begin, |
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2667 int end, TRAPS) { |
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2668 Symbol* sym = SymbolTable::new_symbol(s, begin, end, CHECK_NULL); |
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2669 _symbols->push(sym); |
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2670 return sym; |
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2671 } |
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2672 |
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2673 Symbol* ClassVerifier::create_temporary_symbol(const char *s, int length, TRAPS) { |
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2674 Symbol* sym = SymbolTable::new_symbol(s, length, CHECK_NULL); |
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2675 _symbols->push(sym); |
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2676 return sym; |
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2677 } |