Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.cpp @ 2244:4f26f535a225
6354181: nsk.logging.stress.threads.scmhml001 fails assertion in "src/share/vm/oops/instanceKlass.cpp, 111"
Reviewed-by: jrose, acorn
author | never |
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date | Mon, 31 Jan 2011 17:48:21 -0800 |
parents | 3582bf76420e |
children | b92c45f2bc75 |
rev | line source |
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0 | 1 /* |
1579 | 2 * Copyright (c) 1998, 2010, 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" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "classfile/verifier.hpp" | |
31 #include "classfile/vmSymbols.hpp" | |
32 #include "interpreter/bytecodeStream.hpp" | |
33 #include "memory/oopFactory.hpp" | |
34 #include "memory/resourceArea.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
36 #include "oops/oop.inline.hpp" | |
37 #include "oops/typeArrayOop.hpp" | |
38 #include "prims/jvm.h" | |
39 #include "runtime/fieldDescriptor.hpp" | |
40 #include "runtime/handles.inline.hpp" | |
41 #include "runtime/interfaceSupport.hpp" | |
42 #include "runtime/javaCalls.hpp" | |
43 #include "runtime/orderAccess.hpp" | |
44 #include "runtime/os.hpp" | |
45 #ifdef TARGET_ARCH_x86 | |
46 # include "bytes_x86.hpp" | |
47 #endif | |
48 #ifdef TARGET_ARCH_sparc | |
49 # include "bytes_sparc.hpp" | |
50 #endif | |
51 #ifdef TARGET_ARCH_zero | |
52 # include "bytes_zero.hpp" | |
53 #endif | |
0 | 54 |
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55 #define NOFAILOVER_MAJOR_VERSION 51 |
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56 |
0 | 57 // Access to external entry for VerifyClassCodes - old byte code verifier |
58 | |
59 extern "C" { | |
60 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
61 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
62 } | |
63 | |
64 static void* volatile _verify_byte_codes_fn = NULL; | |
65 | |
66 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
67 | |
68 static void* verify_byte_codes_fn() { | |
69 if (_verify_byte_codes_fn == NULL) { | |
70 void *lib_handle = os::native_java_library(); | |
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71 void *func = os::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); |
0 | 72 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
73 if (func == NULL) { | |
74 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
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75 func = os::dll_lookup(lib_handle, "VerifyClassCodes"); |
0 | 76 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
77 } | |
78 } | |
79 return (void*)_verify_byte_codes_fn; | |
80 } | |
81 | |
82 | |
83 // Methods in Verifier | |
84 | |
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85 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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86 return (class_loader == NULL || !should_verify_class) ? |
0 | 87 BytecodeVerificationLocal : BytecodeVerificationRemote; |
88 } | |
89 | |
90 bool Verifier::relax_verify_for(oop loader) { | |
91 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
92 bool need_verify = | |
93 // verifyAll | |
94 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
95 // verifyRemote | |
96 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
97 return !need_verify; | |
98 } | |
99 | |
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100 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
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101 HandleMark hm; |
0 | 102 ResourceMark rm(THREAD); |
103 | |
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104 Symbol* exception_name = NULL; |
0 | 105 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; |
106 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
107 | |
108 const char* klassName = klass->external_name(); | |
109 | |
110 // If the class should be verified, first see if we can use the split | |
111 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
112 // is set, then call the inference verifier. | |
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113 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 114 if (TraceClassInitialization) { |
115 tty->print_cr("Start class verification for: %s", klassName); | |
116 } | |
117 if (UseSplitVerifier && | |
118 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
119 ClassVerifier split_verifier( | |
120 klass, message_buffer, message_buffer_len, THREAD); | |
121 split_verifier.verify_class(THREAD); | |
122 exception_name = split_verifier.result(); | |
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123 if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && |
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124 FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && |
0 | 125 (exception_name == vmSymbols::java_lang_VerifyError() || |
126 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
127 if (TraceClassInitialization) { | |
128 tty->print_cr( | |
129 "Fail over class verification to old verifier for: %s", klassName); | |
130 } | |
131 exception_name = inference_verify( | |
132 klass, message_buffer, message_buffer_len, THREAD); | |
133 } | |
134 } else { | |
135 exception_name = inference_verify( | |
136 klass, message_buffer, message_buffer_len, THREAD); | |
137 } | |
138 | |
139 if (TraceClassInitialization) { | |
140 if (HAS_PENDING_EXCEPTION) { | |
141 tty->print("Verification for %s has", klassName); | |
142 tty->print_cr(" exception pending %s ", | |
143 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
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144 } else if (exception_name != NULL) { |
0 | 145 tty->print_cr("Verification for %s failed", klassName); |
146 } | |
147 tty->print_cr("End class verification for: %s", klassName); | |
148 } | |
149 } | |
150 | |
151 if (HAS_PENDING_EXCEPTION) { | |
152 return false; // use the existing exception | |
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153 } else if (exception_name == NULL) { |
0 | 154 return true; // verifcation succeeded |
155 } else { // VerifyError or ClassFormatError to be created and thrown | |
156 ResourceMark rm(THREAD); | |
157 instanceKlassHandle kls = | |
158 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
159 while (!kls.is_null()) { | |
160 if (kls == klass) { | |
161 // If the class being verified is the exception we're creating | |
162 // or one of it's superclasses, we're in trouble and are going | |
163 // to infinitely recurse when we try to initialize the exception. | |
164 // So bail out here by throwing the preallocated VM error. | |
165 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
166 } | |
167 kls = kls->super(); | |
168 } | |
169 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
170 THROW_MSG_(exception_name, message_buffer, false); | |
171 } | |
172 } | |
173 | |
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174 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
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175 Symbol* name = klass->name(); |
1142 | 176 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 177 |
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178 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 179 // return if the class is a bootstrapping class |
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180 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 181 // We need to skip the following four for bootstraping |
182 name != vmSymbols::java_lang_Object() && | |
183 name != vmSymbols::java_lang_Class() && | |
184 name != vmSymbols::java_lang_String() && | |
185 name != vmSymbols::java_lang_Throwable() && | |
186 | |
187 // Can not verify the bytecodes for shared classes because they have | |
188 // already been rewritten to contain constant pool cache indices, | |
189 // which the verifier can't understand. | |
190 // Shared classes shouldn't have stackmaps either. | |
191 !klass()->is_shared() && | |
192 | |
193 // As of the fix for 4486457 we disable verification for all of the | |
194 // dynamically-generated bytecodes associated with the 1.4 | |
195 // reflection implementation, not just those associated with | |
196 // sun/reflect/SerializationConstructorAccessor. | |
197 // NOTE: this is called too early in the bootstrapping process to be | |
198 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
199 (refl_magic_klass == NULL || | |
200 !klass->is_subtype_of(refl_magic_klass) || | |
201 VerifyReflectionBytecodes) | |
202 ); | |
203 } | |
204 | |
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205 Symbol* Verifier::inference_verify( |
0 | 206 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { |
207 JavaThread* thread = (JavaThread*)THREAD; | |
208 JNIEnv *env = thread->jni_environment(); | |
209 | |
210 void* verify_func = verify_byte_codes_fn(); | |
211 | |
212 if (verify_func == NULL) { | |
213 jio_snprintf(message, message_len, "Could not link verifier"); | |
214 return vmSymbols::java_lang_VerifyError(); | |
215 } | |
216 | |
217 ResourceMark rm(THREAD); | |
218 if (ClassVerifier::_verify_verbose) { | |
219 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
220 } | |
221 | |
222 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
223 jint result; | |
224 | |
225 { | |
226 HandleMark hm(thread); | |
227 ThreadToNativeFromVM ttn(thread); | |
228 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
229 // code knows that we have left the VM | |
230 | |
231 if (_is_new_verify_byte_codes_fn) { | |
232 verify_byte_codes_fn_new_t func = | |
233 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
234 result = (*func)(env, cls, message, (int)message_len, | |
235 klass->major_version()); | |
236 } else { | |
237 verify_byte_codes_fn_t func = | |
238 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
239 result = (*func)(env, cls, message, (int)message_len); | |
240 } | |
241 } | |
242 | |
243 JNIHandles::destroy_local(cls); | |
244 | |
245 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
246 // to be changed (still return jboolean (unsigned char)), and result is | |
247 // 1 when verification is passed. | |
248 if (result == 0) { | |
249 return vmSymbols::java_lang_VerifyError(); | |
250 } else if (result == 1) { | |
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251 return NULL; // verified. |
0 | 252 } else if (result == 2) { |
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253 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, NULL); |
0 | 254 } else if (result == 3) { |
255 return vmSymbols::java_lang_ClassFormatError(); | |
256 } else { | |
257 ShouldNotReachHere(); | |
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258 return NULL; |
0 | 259 } |
260 } | |
261 | |
262 // Methods in ClassVerifier | |
263 | |
264 bool ClassVerifier::_verify_verbose = false; | |
265 | |
266 ClassVerifier::ClassVerifier( | |
267 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
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268 : _thread(THREAD), _exception_type(NULL), _message(msg), |
0 | 269 _message_buffer_len(msg_len), _klass(klass) { |
270 _this_type = VerificationType::reference_type(klass->name()); | |
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271 // Create list to hold symbols in reference area. |
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272 _symbols = new GrowableArray<Symbol*>(100, 0, NULL); |
0 | 273 } |
274 | |
275 ClassVerifier::~ClassVerifier() { | |
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276 // Decrement the reference count for any symbols created. |
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277 for (int i = 0; i < _symbols->length(); i++) { |
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278 Symbol* s = _symbols->at(i); |
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279 s->decrement_refcount(); |
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280 } |
0 | 281 } |
282 | |
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283 VerificationType ClassVerifier::object_type() const { |
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284 return VerificationType::reference_type(vmSymbols::java_lang_Object()); |
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285 } |
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286 |
0 | 287 void ClassVerifier::verify_class(TRAPS) { |
288 if (_verify_verbose) { | |
289 tty->print_cr("Verifying class %s with new format", | |
290 _klass->external_name()); | |
291 } | |
292 | |
293 objArrayHandle methods(THREAD, _klass->methods()); | |
294 int num_methods = methods->length(); | |
295 | |
296 for (int index = 0; index < num_methods; index++) { | |
1570 | 297 // Check for recursive re-verification before each method. |
298 if (was_recursively_verified()) return; | |
299 | |
0 | 300 methodOop m = (methodOop)methods->obj_at(index); |
301 if (m->is_native() || m->is_abstract()) { | |
302 // If m is native or abstract, skip it. It is checked in class file | |
303 // parser that methods do not override a final method. | |
304 continue; | |
305 } | |
306 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
307 } | |
1570 | 308 |
309 if (_verify_verbose || TraceClassInitialization) { | |
310 if (was_recursively_verified()) | |
311 tty->print_cr("Recursive verification detected for: %s", | |
312 _klass->external_name()); | |
313 } | |
0 | 314 } |
315 | |
316 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
317 _method = m; // initialize _method | |
318 if (_verify_verbose) { | |
319 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
320 } | |
321 | |
322 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
323 | |
324 int32_t max_stack = m->max_stack(); | |
325 int32_t max_locals = m->max_locals(); | |
326 constantPoolHandle cp(THREAD, m->constants()); | |
327 | |
328 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
329 class_format_error("Invalid method signature"); | |
330 return; | |
331 } | |
332 | |
333 // Initial stack map frame: offset is 0, stack is initially empty. | |
334 StackMapFrame current_frame(max_locals, max_stack, this); | |
335 // Set initial locals | |
336 VerificationType return_type = current_frame.set_locals_from_arg( | |
337 m, current_type(), CHECK_VERIFY(this)); | |
338 | |
339 int32_t stackmap_index = 0; // index to the stackmap array | |
340 | |
341 u4 code_length = m->code_size(); | |
342 | |
343 // Scan the bytecode and map each instruction's start offset to a number. | |
344 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
345 | |
346 int ex_min = code_length; | |
347 int ex_max = -1; | |
348 // Look through each item on the exception table. Each of the fields must refer | |
349 // to a legal instruction. | |
350 verify_exception_handler_table( | |
351 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
352 | |
353 // Look through each entry on the local variable table and make sure | |
354 // its range of code array offsets is valid. (4169817) | |
355 if (m->has_localvariable_table()) { | |
356 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
357 } | |
358 | |
359 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
360 StackMapStream stream(stackmap_data); | |
361 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
362 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
363 code_data, code_length, CHECK_VERIFY(this)); | |
364 | |
365 if (_verify_verbose) { | |
366 stackmap_table.print(); | |
367 } | |
368 | |
369 RawBytecodeStream bcs(m); | |
370 | |
371 // Scan the byte code linearly from the start to the end | |
372 bool no_control_flow = false; // Set to true when there is no direct control | |
373 // flow from current instruction to the next | |
374 // instruction in sequence | |
375 Bytecodes::Code opcode; | |
376 while (!bcs.is_last_bytecode()) { | |
1570 | 377 // Check for recursive re-verification before each bytecode. |
378 if (was_recursively_verified()) return; | |
379 | |
0 | 380 opcode = bcs.raw_next(); |
381 u2 bci = bcs.bci(); | |
382 | |
383 // Set current frame's offset to bci | |
384 current_frame.set_offset(bci); | |
385 | |
386 // Make sure every offset in stackmap table point to the beginning to | |
387 // an instruction. Match current_frame to stackmap_table entry with | |
388 // the same offset if exists. | |
389 stackmap_index = verify_stackmap_table( | |
390 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
391 no_control_flow, CHECK_VERIFY(this)); | |
392 | |
393 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
394 | |
395 // Merge with the next instruction | |
396 { | |
397 u2 index; | |
398 int target; | |
399 VerificationType type, type2; | |
400 VerificationType atype; | |
401 | |
402 #ifndef PRODUCT | |
403 if (_verify_verbose) { | |
404 current_frame.print(); | |
405 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
406 } | |
407 #endif | |
408 | |
409 // Make sure wide instruction is in correct format | |
410 if (bcs.is_wide()) { | |
411 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
412 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
413 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
414 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
415 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
416 opcode != Bytecodes::_dstore) { | |
417 verify_error(bci, "Bad wide instruction"); | |
418 return; | |
419 } | |
420 } | |
421 | |
422 switch (opcode) { | |
423 case Bytecodes::_nop : | |
424 no_control_flow = false; break; | |
425 case Bytecodes::_aconst_null : | |
426 current_frame.push_stack( | |
427 VerificationType::null_type(), CHECK_VERIFY(this)); | |
428 no_control_flow = false; break; | |
429 case Bytecodes::_iconst_m1 : | |
430 case Bytecodes::_iconst_0 : | |
431 case Bytecodes::_iconst_1 : | |
432 case Bytecodes::_iconst_2 : | |
433 case Bytecodes::_iconst_3 : | |
434 case Bytecodes::_iconst_4 : | |
435 case Bytecodes::_iconst_5 : | |
436 current_frame.push_stack( | |
437 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
438 no_control_flow = false; break; | |
439 case Bytecodes::_lconst_0 : | |
440 case Bytecodes::_lconst_1 : | |
441 current_frame.push_stack_2( | |
442 VerificationType::long_type(), | |
443 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
444 no_control_flow = false; break; | |
445 case Bytecodes::_fconst_0 : | |
446 case Bytecodes::_fconst_1 : | |
447 case Bytecodes::_fconst_2 : | |
448 current_frame.push_stack( | |
449 VerificationType::float_type(), CHECK_VERIFY(this)); | |
450 no_control_flow = false; break; | |
451 case Bytecodes::_dconst_0 : | |
452 case Bytecodes::_dconst_1 : | |
453 current_frame.push_stack_2( | |
454 VerificationType::double_type(), | |
455 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
456 no_control_flow = false; break; | |
457 case Bytecodes::_sipush : | |
458 case Bytecodes::_bipush : | |
459 current_frame.push_stack( | |
460 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
461 no_control_flow = false; break; | |
462 case Bytecodes::_ldc : | |
463 verify_ldc( | |
1565 | 464 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 465 cp, bci, CHECK_VERIFY(this)); |
466 no_control_flow = false; break; | |
467 case Bytecodes::_ldc_w : | |
468 case Bytecodes::_ldc2_w : | |
469 verify_ldc( | |
1565 | 470 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 471 cp, bci, CHECK_VERIFY(this)); |
472 no_control_flow = false; break; | |
473 case Bytecodes::_iload : | |
474 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
475 no_control_flow = false; break; | |
476 case Bytecodes::_iload_0 : | |
477 case Bytecodes::_iload_1 : | |
478 case Bytecodes::_iload_2 : | |
479 case Bytecodes::_iload_3 : | |
480 index = opcode - Bytecodes::_iload_0; | |
481 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
482 no_control_flow = false; break; | |
483 case Bytecodes::_lload : | |
484 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
485 no_control_flow = false; break; | |
486 case Bytecodes::_lload_0 : | |
487 case Bytecodes::_lload_1 : | |
488 case Bytecodes::_lload_2 : | |
489 case Bytecodes::_lload_3 : | |
490 index = opcode - Bytecodes::_lload_0; | |
491 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
492 no_control_flow = false; break; | |
493 case Bytecodes::_fload : | |
494 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
495 no_control_flow = false; break; | |
496 case Bytecodes::_fload_0 : | |
497 case Bytecodes::_fload_1 : | |
498 case Bytecodes::_fload_2 : | |
499 case Bytecodes::_fload_3 : | |
500 index = opcode - Bytecodes::_fload_0; | |
501 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
502 no_control_flow = false; break; | |
503 case Bytecodes::_dload : | |
504 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
505 no_control_flow = false; break; | |
506 case Bytecodes::_dload_0 : | |
507 case Bytecodes::_dload_1 : | |
508 case Bytecodes::_dload_2 : | |
509 case Bytecodes::_dload_3 : | |
510 index = opcode - Bytecodes::_dload_0; | |
511 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
512 no_control_flow = false; break; | |
513 case Bytecodes::_aload : | |
514 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
515 no_control_flow = false; break; | |
516 case Bytecodes::_aload_0 : | |
517 case Bytecodes::_aload_1 : | |
518 case Bytecodes::_aload_2 : | |
519 case Bytecodes::_aload_3 : | |
520 index = opcode - Bytecodes::_aload_0; | |
521 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
522 no_control_flow = false; break; | |
523 case Bytecodes::_iaload : | |
524 type = current_frame.pop_stack( | |
525 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
526 atype = current_frame.pop_stack( | |
527 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
528 if (!atype.is_int_array()) { | |
529 verify_error(bci, bad_type_msg, "iaload"); | |
530 return; | |
531 } | |
532 current_frame.push_stack( | |
533 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
534 no_control_flow = false; break; | |
535 case Bytecodes::_baload : | |
536 type = current_frame.pop_stack( | |
537 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
538 atype = current_frame.pop_stack( | |
539 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
540 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
541 verify_error(bci, bad_type_msg, "baload"); | |
542 return; | |
543 } | |
544 current_frame.push_stack( | |
545 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
546 no_control_flow = false; break; | |
547 case Bytecodes::_caload : | |
548 type = current_frame.pop_stack( | |
549 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
550 atype = current_frame.pop_stack( | |
551 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
552 if (!atype.is_char_array()) { | |
553 verify_error(bci, bad_type_msg, "caload"); | |
554 return; | |
555 } | |
556 current_frame.push_stack( | |
557 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
558 no_control_flow = false; break; | |
559 case Bytecodes::_saload : | |
560 type = current_frame.pop_stack( | |
561 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
562 atype = current_frame.pop_stack( | |
563 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
564 if (!atype.is_short_array()) { | |
565 verify_error(bci, bad_type_msg, "saload"); | |
566 return; | |
567 } | |
568 current_frame.push_stack( | |
569 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
570 no_control_flow = false; break; | |
571 case Bytecodes::_laload : | |
572 type = current_frame.pop_stack( | |
573 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
574 atype = current_frame.pop_stack( | |
575 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
576 if (!atype.is_long_array()) { | |
577 verify_error(bci, bad_type_msg, "laload"); | |
578 return; | |
579 } | |
580 current_frame.push_stack_2( | |
581 VerificationType::long_type(), | |
582 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
583 no_control_flow = false; break; | |
584 case Bytecodes::_faload : | |
585 type = current_frame.pop_stack( | |
586 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
587 atype = current_frame.pop_stack( | |
588 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
589 if (!atype.is_float_array()) { | |
590 verify_error(bci, bad_type_msg, "faload"); | |
591 return; | |
592 } | |
593 current_frame.push_stack( | |
594 VerificationType::float_type(), CHECK_VERIFY(this)); | |
595 no_control_flow = false; break; | |
596 case Bytecodes::_daload : | |
597 type = current_frame.pop_stack( | |
598 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
599 atype = current_frame.pop_stack( | |
600 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
601 if (!atype.is_double_array()) { | |
602 verify_error(bci, bad_type_msg, "daload"); | |
603 return; | |
604 } | |
605 current_frame.push_stack_2( | |
606 VerificationType::double_type(), | |
607 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
608 no_control_flow = false; break; | |
609 case Bytecodes::_aaload : { | |
610 type = current_frame.pop_stack( | |
611 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
612 atype = current_frame.pop_stack( | |
613 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
614 if (!atype.is_reference_array()) { | |
615 verify_error(bci, bad_type_msg, "aaload"); | |
616 return; | |
617 } | |
618 if (atype.is_null()) { | |
619 current_frame.push_stack( | |
620 VerificationType::null_type(), CHECK_VERIFY(this)); | |
621 } else { | |
622 VerificationType component = | |
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623 atype.get_component(this, CHECK_VERIFY(this)); |
0 | 624 current_frame.push_stack(component, CHECK_VERIFY(this)); |
625 } | |
626 no_control_flow = false; break; | |
627 } | |
628 case Bytecodes::_istore : | |
629 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
630 no_control_flow = false; break; | |
631 case Bytecodes::_istore_0 : | |
632 case Bytecodes::_istore_1 : | |
633 case Bytecodes::_istore_2 : | |
634 case Bytecodes::_istore_3 : | |
635 index = opcode - Bytecodes::_istore_0; | |
636 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
637 no_control_flow = false; break; | |
638 case Bytecodes::_lstore : | |
639 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
640 no_control_flow = false; break; | |
641 case Bytecodes::_lstore_0 : | |
642 case Bytecodes::_lstore_1 : | |
643 case Bytecodes::_lstore_2 : | |
644 case Bytecodes::_lstore_3 : | |
645 index = opcode - Bytecodes::_lstore_0; | |
646 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
647 no_control_flow = false; break; | |
648 case Bytecodes::_fstore : | |
649 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
650 no_control_flow = false; break; | |
651 case Bytecodes::_fstore_0 : | |
652 case Bytecodes::_fstore_1 : | |
653 case Bytecodes::_fstore_2 : | |
654 case Bytecodes::_fstore_3 : | |
655 index = opcode - Bytecodes::_fstore_0; | |
656 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
657 no_control_flow = false; break; | |
658 case Bytecodes::_dstore : | |
659 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
660 no_control_flow = false; break; | |
661 case Bytecodes::_dstore_0 : | |
662 case Bytecodes::_dstore_1 : | |
663 case Bytecodes::_dstore_2 : | |
664 case Bytecodes::_dstore_3 : | |
665 index = opcode - Bytecodes::_dstore_0; | |
666 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
667 no_control_flow = false; break; | |
668 case Bytecodes::_astore : | |
669 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
670 no_control_flow = false; break; | |
671 case Bytecodes::_astore_0 : | |
672 case Bytecodes::_astore_1 : | |
673 case Bytecodes::_astore_2 : | |
674 case Bytecodes::_astore_3 : | |
675 index = opcode - Bytecodes::_astore_0; | |
676 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
677 no_control_flow = false; break; | |
678 case Bytecodes::_iastore : | |
679 type = current_frame.pop_stack( | |
680 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
681 type2 = current_frame.pop_stack( | |
682 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
683 atype = current_frame.pop_stack( | |
684 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
685 if (!atype.is_int_array()) { | |
686 verify_error(bci, bad_type_msg, "iastore"); | |
687 return; | |
688 } | |
689 no_control_flow = false; break; | |
690 case Bytecodes::_bastore : | |
691 type = current_frame.pop_stack( | |
692 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
693 type2 = current_frame.pop_stack( | |
694 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
695 atype = current_frame.pop_stack( | |
696 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
697 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
698 verify_error(bci, bad_type_msg, "bastore"); | |
699 return; | |
700 } | |
701 no_control_flow = false; break; | |
702 case Bytecodes::_castore : | |
703 current_frame.pop_stack( | |
704 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
705 current_frame.pop_stack( | |
706 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
707 atype = current_frame.pop_stack( | |
708 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
709 if (!atype.is_char_array()) { | |
710 verify_error(bci, bad_type_msg, "castore"); | |
711 return; | |
712 } | |
713 no_control_flow = false; break; | |
714 case Bytecodes::_sastore : | |
715 current_frame.pop_stack( | |
716 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
717 current_frame.pop_stack( | |
718 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
719 atype = current_frame.pop_stack( | |
720 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
721 if (!atype.is_short_array()) { | |
722 verify_error(bci, bad_type_msg, "sastore"); | |
723 return; | |
724 } | |
725 no_control_flow = false; break; | |
726 case Bytecodes::_lastore : | |
727 current_frame.pop_stack_2( | |
728 VerificationType::long2_type(), | |
729 VerificationType::long_type(), CHECK_VERIFY(this)); | |
730 current_frame.pop_stack( | |
731 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
732 atype = current_frame.pop_stack( | |
733 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
734 if (!atype.is_long_array()) { | |
735 verify_error(bci, bad_type_msg, "lastore"); | |
736 return; | |
737 } | |
738 no_control_flow = false; break; | |
739 case Bytecodes::_fastore : | |
740 current_frame.pop_stack( | |
741 VerificationType::float_type(), CHECK_VERIFY(this)); | |
742 current_frame.pop_stack | |
743 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
744 atype = current_frame.pop_stack( | |
745 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
746 if (!atype.is_float_array()) { | |
747 verify_error(bci, bad_type_msg, "fastore"); | |
748 return; | |
749 } | |
750 no_control_flow = false; break; | |
751 case Bytecodes::_dastore : | |
752 current_frame.pop_stack_2( | |
753 VerificationType::double2_type(), | |
754 VerificationType::double_type(), CHECK_VERIFY(this)); | |
755 current_frame.pop_stack( | |
756 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
757 atype = current_frame.pop_stack( | |
758 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
759 if (!atype.is_double_array()) { | |
760 verify_error(bci, bad_type_msg, "dastore"); | |
761 return; | |
762 } | |
763 no_control_flow = false; break; | |
764 case Bytecodes::_aastore : | |
1955
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765 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 766 type2 = current_frame.pop_stack( |
767 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
768 atype = current_frame.pop_stack( | |
769 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
770 // more type-checking is done at runtime | |
771 if (!atype.is_reference_array()) { | |
772 verify_error(bci, bad_type_msg, "aastore"); | |
773 return; | |
774 } | |
775 // 4938384: relaxed constraint in JVMS 3nd edition. | |
776 no_control_flow = false; break; | |
777 case Bytecodes::_pop : | |
778 current_frame.pop_stack( | |
779 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
780 no_control_flow = false; break; | |
781 case Bytecodes::_pop2 : | |
782 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
783 if (type.is_category1()) { | |
784 current_frame.pop_stack( | |
785 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
786 } else if (type.is_category2_2nd()) { | |
787 current_frame.pop_stack( | |
788 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
789 } else { | |
790 verify_error(bci, bad_type_msg, "pop2"); | |
791 return; | |
792 } | |
793 no_control_flow = false; break; | |
794 case Bytecodes::_dup : | |
795 type = current_frame.pop_stack( | |
796 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
797 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
798 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
799 no_control_flow = false; break; | |
800 case Bytecodes::_dup_x1 : | |
801 type = current_frame.pop_stack( | |
802 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
803 type2 = current_frame.pop_stack( | |
804 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
805 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
806 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
807 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
808 no_control_flow = false; break; | |
809 case Bytecodes::_dup_x2 : | |
810 { | |
811 VerificationType type3; | |
812 type = current_frame.pop_stack( | |
813 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
814 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
815 if (type2.is_category1()) { | |
816 type3 = current_frame.pop_stack( | |
817 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
818 } else if (type2.is_category2_2nd()) { | |
819 type3 = current_frame.pop_stack( | |
820 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
821 } else { | |
822 verify_error(bci, bad_type_msg, "dup_x2"); | |
823 return; | |
824 } | |
825 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
826 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
827 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
828 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
829 no_control_flow = false; break; | |
830 } | |
831 case Bytecodes::_dup2 : | |
832 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
833 if (type.is_category1()) { | |
834 type2 = current_frame.pop_stack( | |
835 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
836 } else if (type.is_category2_2nd()) { | |
837 type2 = current_frame.pop_stack( | |
838 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
839 } else { | |
840 verify_error(bci, bad_type_msg, "dup2"); | |
841 return; | |
842 } | |
843 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
844 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
845 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
846 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
847 no_control_flow = false; break; | |
848 case Bytecodes::_dup2_x1 : | |
849 { | |
850 VerificationType type3; | |
851 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
852 if (type.is_category1()) { | |
853 type2 = current_frame.pop_stack( | |
854 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
855 } else if(type.is_category2_2nd()) { | |
856 type2 = current_frame.pop_stack | |
857 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
858 } else { | |
859 verify_error(bci, bad_type_msg, "dup2_x1"); | |
860 return; | |
861 } | |
862 type3 = current_frame.pop_stack( | |
863 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
864 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
865 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
866 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
867 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
868 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
869 no_control_flow = false; break; | |
870 } | |
871 case Bytecodes::_dup2_x2 : | |
872 { | |
873 VerificationType type3, type4; | |
874 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
875 if (type.is_category1()) { | |
876 type2 = current_frame.pop_stack( | |
877 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
878 } else if (type.is_category2_2nd()) { | |
879 type2 = current_frame.pop_stack( | |
880 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
881 } else { | |
882 verify_error(bci, bad_type_msg, "dup2_x2"); | |
883 return; | |
884 } | |
885 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
886 if (type3.is_category1()) { | |
887 type4 = current_frame.pop_stack( | |
888 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
889 } else if (type3.is_category2_2nd()) { | |
890 type4 = current_frame.pop_stack( | |
891 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
892 } else { | |
893 verify_error(bci, bad_type_msg, "dup2_x2"); | |
894 return; | |
895 } | |
896 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
897 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
898 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
899 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
900 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
901 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
902 no_control_flow = false; break; | |
903 } | |
904 case Bytecodes::_swap : | |
905 type = current_frame.pop_stack( | |
906 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
907 type2 = current_frame.pop_stack( | |
908 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
909 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
910 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
911 no_control_flow = false; break; | |
912 case Bytecodes::_iadd : | |
913 case Bytecodes::_isub : | |
914 case Bytecodes::_imul : | |
915 case Bytecodes::_idiv : | |
916 case Bytecodes::_irem : | |
917 case Bytecodes::_ishl : | |
918 case Bytecodes::_ishr : | |
919 case Bytecodes::_iushr : | |
920 case Bytecodes::_ior : | |
921 case Bytecodes::_ixor : | |
922 case Bytecodes::_iand : | |
923 current_frame.pop_stack( | |
924 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
925 // fall through | |
926 case Bytecodes::_ineg : | |
927 current_frame.pop_stack( | |
928 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
929 current_frame.push_stack( | |
930 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
931 no_control_flow = false; break; | |
932 case Bytecodes::_ladd : | |
933 case Bytecodes::_lsub : | |
934 case Bytecodes::_lmul : | |
935 case Bytecodes::_ldiv : | |
936 case Bytecodes::_lrem : | |
937 case Bytecodes::_land : | |
938 case Bytecodes::_lor : | |
939 case Bytecodes::_lxor : | |
940 current_frame.pop_stack_2( | |
941 VerificationType::long2_type(), | |
942 VerificationType::long_type(), CHECK_VERIFY(this)); | |
943 // fall through | |
944 case Bytecodes::_lneg : | |
945 current_frame.pop_stack_2( | |
946 VerificationType::long2_type(), | |
947 VerificationType::long_type(), CHECK_VERIFY(this)); | |
948 current_frame.push_stack_2( | |
949 VerificationType::long_type(), | |
950 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
951 no_control_flow = false; break; | |
952 case Bytecodes::_lshl : | |
953 case Bytecodes::_lshr : | |
954 case Bytecodes::_lushr : | |
955 current_frame.pop_stack( | |
956 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
957 current_frame.pop_stack_2( | |
958 VerificationType::long2_type(), | |
959 VerificationType::long_type(), CHECK_VERIFY(this)); | |
960 current_frame.push_stack_2( | |
961 VerificationType::long_type(), | |
962 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
963 no_control_flow = false; break; | |
964 case Bytecodes::_fadd : | |
965 case Bytecodes::_fsub : | |
966 case Bytecodes::_fmul : | |
967 case Bytecodes::_fdiv : | |
968 case Bytecodes::_frem : | |
969 current_frame.pop_stack( | |
970 VerificationType::float_type(), CHECK_VERIFY(this)); | |
971 // fall through | |
972 case Bytecodes::_fneg : | |
973 current_frame.pop_stack( | |
974 VerificationType::float_type(), CHECK_VERIFY(this)); | |
975 current_frame.push_stack( | |
976 VerificationType::float_type(), CHECK_VERIFY(this)); | |
977 no_control_flow = false; break; | |
978 case Bytecodes::_dadd : | |
979 case Bytecodes::_dsub : | |
980 case Bytecodes::_dmul : | |
981 case Bytecodes::_ddiv : | |
982 case Bytecodes::_drem : | |
983 current_frame.pop_stack_2( | |
984 VerificationType::double2_type(), | |
985 VerificationType::double_type(), CHECK_VERIFY(this)); | |
986 // fall through | |
987 case Bytecodes::_dneg : | |
988 current_frame.pop_stack_2( | |
989 VerificationType::double2_type(), | |
990 VerificationType::double_type(), CHECK_VERIFY(this)); | |
991 current_frame.push_stack_2( | |
992 VerificationType::double_type(), | |
993 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
994 no_control_flow = false; break; | |
995 case Bytecodes::_iinc : | |
996 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
997 no_control_flow = false; break; | |
998 case Bytecodes::_i2l : | |
999 type = current_frame.pop_stack( | |
1000 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1001 current_frame.push_stack_2( | |
1002 VerificationType::long_type(), | |
1003 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1004 no_control_flow = false; break; | |
1005 case Bytecodes::_l2i : | |
1006 current_frame.pop_stack_2( | |
1007 VerificationType::long2_type(), | |
1008 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1009 current_frame.push_stack( | |
1010 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1011 no_control_flow = false; break; | |
1012 case Bytecodes::_i2f : | |
1013 current_frame.pop_stack( | |
1014 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1015 current_frame.push_stack( | |
1016 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1017 no_control_flow = false; break; | |
1018 case Bytecodes::_i2d : | |
1019 current_frame.pop_stack( | |
1020 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1021 current_frame.push_stack_2( | |
1022 VerificationType::double_type(), | |
1023 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1024 no_control_flow = false; break; | |
1025 case Bytecodes::_l2f : | |
1026 current_frame.pop_stack_2( | |
1027 VerificationType::long2_type(), | |
1028 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1029 current_frame.push_stack( | |
1030 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1031 no_control_flow = false; break; | |
1032 case Bytecodes::_l2d : | |
1033 current_frame.pop_stack_2( | |
1034 VerificationType::long2_type(), | |
1035 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1036 current_frame.push_stack_2( | |
1037 VerificationType::double_type(), | |
1038 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1039 no_control_flow = false; break; | |
1040 case Bytecodes::_f2i : | |
1041 current_frame.pop_stack( | |
1042 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1043 current_frame.push_stack( | |
1044 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1045 no_control_flow = false; break; | |
1046 case Bytecodes::_f2l : | |
1047 current_frame.pop_stack( | |
1048 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1049 current_frame.push_stack_2( | |
1050 VerificationType::long_type(), | |
1051 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1052 no_control_flow = false; break; | |
1053 case Bytecodes::_f2d : | |
1054 current_frame.pop_stack( | |
1055 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1056 current_frame.push_stack_2( | |
1057 VerificationType::double_type(), | |
1058 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1059 no_control_flow = false; break; | |
1060 case Bytecodes::_d2i : | |
1061 current_frame.pop_stack_2( | |
1062 VerificationType::double2_type(), | |
1063 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1064 current_frame.push_stack( | |
1065 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1066 no_control_flow = false; break; | |
1067 case Bytecodes::_d2l : | |
1068 current_frame.pop_stack_2( | |
1069 VerificationType::double2_type(), | |
1070 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1071 current_frame.push_stack_2( | |
1072 VerificationType::long_type(), | |
1073 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1074 no_control_flow = false; break; | |
1075 case Bytecodes::_d2f : | |
1076 current_frame.pop_stack_2( | |
1077 VerificationType::double2_type(), | |
1078 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1079 current_frame.push_stack( | |
1080 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1081 no_control_flow = false; break; | |
1082 case Bytecodes::_i2b : | |
1083 case Bytecodes::_i2c : | |
1084 case Bytecodes::_i2s : | |
1085 current_frame.pop_stack( | |
1086 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1087 current_frame.push_stack( | |
1088 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1089 no_control_flow = false; break; | |
1090 case Bytecodes::_lcmp : | |
1091 current_frame.pop_stack_2( | |
1092 VerificationType::long2_type(), | |
1093 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1094 current_frame.pop_stack_2( | |
1095 VerificationType::long2_type(), | |
1096 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1097 current_frame.push_stack( | |
1098 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1099 no_control_flow = false; break; | |
1100 case Bytecodes::_fcmpl : | |
1101 case Bytecodes::_fcmpg : | |
1102 current_frame.pop_stack( | |
1103 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1104 current_frame.pop_stack( | |
1105 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1106 current_frame.push_stack( | |
1107 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1108 no_control_flow = false; break; | |
1109 case Bytecodes::_dcmpl : | |
1110 case Bytecodes::_dcmpg : | |
1111 current_frame.pop_stack_2( | |
1112 VerificationType::double2_type(), | |
1113 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1114 current_frame.pop_stack_2( | |
1115 VerificationType::double2_type(), | |
1116 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1117 current_frame.push_stack( | |
1118 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1119 no_control_flow = false; break; | |
1120 case Bytecodes::_if_icmpeq: | |
1121 case Bytecodes::_if_icmpne: | |
1122 case Bytecodes::_if_icmplt: | |
1123 case Bytecodes::_if_icmpge: | |
1124 case Bytecodes::_if_icmpgt: | |
1125 case Bytecodes::_if_icmple: | |
1126 current_frame.pop_stack( | |
1127 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1128 // fall through | |
1129 case Bytecodes::_ifeq: | |
1130 case Bytecodes::_ifne: | |
1131 case Bytecodes::_iflt: | |
1132 case Bytecodes::_ifge: | |
1133 case Bytecodes::_ifgt: | |
1134 case Bytecodes::_ifle: | |
1135 current_frame.pop_stack( | |
1136 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1137 target = bcs.dest(); | |
1138 stackmap_table.check_jump_target( | |
1139 ¤t_frame, target, CHECK_VERIFY(this)); | |
1140 no_control_flow = false; break; | |
1141 case Bytecodes::_if_acmpeq : | |
1142 case Bytecodes::_if_acmpne : | |
1143 current_frame.pop_stack( | |
1144 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1145 // fall through | |
1146 case Bytecodes::_ifnull : | |
1147 case Bytecodes::_ifnonnull : | |
1148 current_frame.pop_stack( | |
1149 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1150 target = bcs.dest(); | |
1151 stackmap_table.check_jump_target | |
1152 (¤t_frame, target, CHECK_VERIFY(this)); | |
1153 no_control_flow = false; break; | |
1154 case Bytecodes::_goto : | |
1155 target = bcs.dest(); | |
1156 stackmap_table.check_jump_target( | |
1157 ¤t_frame, target, CHECK_VERIFY(this)); | |
1158 no_control_flow = true; break; | |
1159 case Bytecodes::_goto_w : | |
1160 target = bcs.dest_w(); | |
1161 stackmap_table.check_jump_target( | |
1162 ¤t_frame, target, CHECK_VERIFY(this)); | |
1163 no_control_flow = true; break; | |
1164 case Bytecodes::_tableswitch : | |
1165 case Bytecodes::_lookupswitch : | |
1166 verify_switch( | |
1167 &bcs, code_length, code_data, ¤t_frame, | |
1168 &stackmap_table, CHECK_VERIFY(this)); | |
1169 no_control_flow = true; break; | |
1170 case Bytecodes::_ireturn : | |
1171 type = current_frame.pop_stack( | |
1172 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1173 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1174 no_control_flow = true; break; | |
1175 case Bytecodes::_lreturn : | |
1176 type2 = current_frame.pop_stack( | |
1177 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1178 type = current_frame.pop_stack( | |
1179 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1180 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1181 no_control_flow = true; break; | |
1182 case Bytecodes::_freturn : | |
1183 type = current_frame.pop_stack( | |
1184 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1185 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1186 no_control_flow = true; break; | |
1187 case Bytecodes::_dreturn : | |
1188 type2 = current_frame.pop_stack( | |
1189 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1190 type = current_frame.pop_stack( | |
1191 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1192 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1193 no_control_flow = true; break; | |
1194 case Bytecodes::_areturn : | |
1195 type = current_frame.pop_stack( | |
1196 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1197 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1198 no_control_flow = true; break; | |
1199 case Bytecodes::_return : | |
1200 if (return_type != VerificationType::bogus_type()) { | |
1201 verify_error(bci, "Method expects no return value"); | |
1202 return; | |
1203 } | |
1204 // Make sure "this" has been initialized if current method is an | |
1205 // <init> | |
1206 if (_method->name() == vmSymbols::object_initializer_name() && | |
1207 current_frame.flag_this_uninit()) { | |
1208 verify_error(bci, | |
1209 "Constructor must call super() or this() before return"); | |
1210 return; | |
1211 } | |
1212 no_control_flow = true; break; | |
1213 case Bytecodes::_getstatic : | |
1214 case Bytecodes::_putstatic : | |
1215 case Bytecodes::_getfield : | |
1216 case Bytecodes::_putfield : | |
1217 verify_field_instructions( | |
1218 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1219 no_control_flow = false; break; | |
1220 case Bytecodes::_invokevirtual : | |
1221 case Bytecodes::_invokespecial : | |
1222 case Bytecodes::_invokestatic : | |
1223 verify_invoke_instructions( | |
1224 &bcs, code_length, ¤t_frame, | |
1225 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1226 no_control_flow = false; break; | |
1227 case Bytecodes::_invokeinterface : | |
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be93aad57795
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|
1228 case Bytecodes::_invokedynamic : |
0 | 1229 verify_invoke_instructions( |
1230 &bcs, code_length, ¤t_frame, | |
1231 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1232 no_control_flow = false; break; | |
1233 case Bytecodes::_new : | |
1234 { | |
1565 | 1235 index = bcs.get_index_u2(); |
0 | 1236 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1237 VerificationType new_class_type = | |
1238 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1239 if (!new_class_type.is_object()) { | |
1240 verify_error(bci, "Illegal new instruction"); | |
1241 return; | |
1242 } | |
1243 type = VerificationType::uninitialized_type(bci); | |
1244 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1245 no_control_flow = false; break; | |
1246 } | |
1247 case Bytecodes::_newarray : | |
1248 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1249 current_frame.pop_stack( | |
1250 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1251 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1252 no_control_flow = false; break; | |
1253 case Bytecodes::_anewarray : | |
1254 verify_anewarray( | |
1565 | 1255 bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1256 no_control_flow = false; break; |
1257 case Bytecodes::_arraylength : | |
1258 type = current_frame.pop_stack( | |
1259 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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|
1260 if (!(type.is_null() || type.is_array())) { |
0 | 1261 verify_error(bci, bad_type_msg, "arraylength"); |
1262 } | |
1263 current_frame.push_stack( | |
1264 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1265 no_control_flow = false; break; | |
1266 case Bytecodes::_checkcast : | |
1267 { | |
1565 | 1268 index = bcs.get_index_u2(); |
0 | 1269 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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diff
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|
1270 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1271 VerificationType klass_type = cp_index_to_type( |
1272 index, cp, CHECK_VERIFY(this)); | |
1273 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1274 no_control_flow = false; break; | |
1275 } | |
1276 case Bytecodes::_instanceof : { | |
1565 | 1277 index = bcs.get_index_u2(); |
0 | 1278 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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|
1279 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1280 current_frame.push_stack( |
1281 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1282 no_control_flow = false; break; | |
1283 } | |
1284 case Bytecodes::_monitorenter : | |
1285 case Bytecodes::_monitorexit : | |
1286 current_frame.pop_stack( | |
1287 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1288 no_control_flow = false; break; | |
1289 case Bytecodes::_multianewarray : | |
1290 { | |
1565 | 1291 index = bcs.get_index_u2(); |
0 | 1292 u2 dim = *(bcs.bcp()+3); |
1293 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1294 VerificationType new_array_type = | |
1295 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1296 if (!new_array_type.is_array()) { | |
1297 verify_error(bci, | |
1298 "Illegal constant pool index in multianewarray instruction"); | |
1299 return; | |
1300 } | |
1301 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1302 verify_error(bci, | |
1303 "Illegal dimension in multianewarray instruction"); | |
1304 return; | |
1305 } | |
1306 for (int i = 0; i < dim; i++) { | |
1307 current_frame.pop_stack( | |
1308 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1309 } | |
1310 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1311 no_control_flow = false; break; | |
1312 } | |
1313 case Bytecodes::_athrow : | |
1314 type = VerificationType::reference_type( | |
1315 vmSymbols::java_lang_Throwable()); | |
1316 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1317 no_control_flow = true; break; | |
1318 default: | |
1319 // We only need to check the valid bytecodes in class file. | |
1320 // And jsr and ret are not in the new class file format in JDK1.5. | |
1321 verify_error(bci, "Bad instruction"); | |
1322 no_control_flow = false; | |
1323 return; | |
1324 } // end switch | |
1325 } // end Merge with the next instruction | |
1326 | |
1327 // Look for possible jump target in exception handlers and see if it | |
1328 // matches current_frame | |
1329 if (bci >= ex_min && bci < ex_max) { | |
1330 verify_exception_handler_targets( | |
1331 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1332 } | |
1333 } // end while | |
1334 | |
1335 // Make sure that control flow does not fall through end of the method | |
1336 if (!no_control_flow) { | |
1337 verify_error(code_length, "Control flow falls through code end"); | |
1338 return; | |
1339 } | |
1340 } | |
1341 | |
1342 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1343 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1344 memset(code_data, 0, sizeof(char) * code_length); | |
1345 RawBytecodeStream bcs(m); | |
1346 | |
1347 while (!bcs.is_last_bytecode()) { | |
1348 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1349 int bci = bcs.bci(); | |
1565 | 1350 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1351 code_data[bci] = NEW_OFFSET; |
1352 } else { | |
1353 code_data[bci] = BYTECODE_OFFSET; | |
1354 } | |
1355 } else { | |
1356 verify_error(bcs.bci(), "Bad instruction"); | |
1357 return NULL; | |
1358 } | |
1359 } | |
1360 | |
1361 return code_data; | |
1362 } | |
1363 | |
1364 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1365 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1366 constantPoolHandle cp (THREAD, _method->constants()); | |
1367 | |
1368 if (exhandlers() != NULL) { | |
1369 for(int i = 0; i < exhandlers->length();) { | |
1370 u2 start_pc = exhandlers->int_at(i++); | |
1371 u2 end_pc = exhandlers->int_at(i++); | |
1372 u2 handler_pc = exhandlers->int_at(i++); | |
1373 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1374 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1375 return; | |
1376 } | |
1377 if (end_pc != code_length) { // special case: end_pc == code_length | |
1378 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1379 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1380 return; | |
1381 } | |
1382 } | |
1383 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1384 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1385 return; | |
1386 } | |
1387 int catch_type_index = exhandlers->int_at(i++); | |
1388 if (catch_type_index != 0) { | |
1389 VerificationType catch_type = cp_index_to_type( | |
1390 catch_type_index, cp, CHECK_VERIFY(this)); | |
1391 VerificationType throwable = | |
1392 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1393 bool is_subclass = throwable.is_assignable_from( | |
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1394 catch_type, this, CHECK_VERIFY(this)); |
0 | 1395 if (!is_subclass) { |
1396 // 4286534: should throw VerifyError according to recent spec change | |
1397 verify_error( | |
1398 "Catch type is not a subclass of Throwable in handler %d", | |
1399 handler_pc); | |
1400 return; | |
1401 } | |
1402 } | |
1403 if (start_pc < min) min = start_pc; | |
1404 if (end_pc > max) max = end_pc; | |
1405 } | |
1406 } | |
1407 } | |
1408 | |
1409 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1410 int localvariable_table_length = _method()->localvariable_table_length(); | |
1411 if (localvariable_table_length > 0) { | |
1412 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1413 for (int i = 0; i < localvariable_table_length; i++) { | |
1414 u2 start_bci = table[i].start_bci; | |
1415 u2 length = table[i].length; | |
1416 | |
1417 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1418 class_format_error( | |
1419 "Illegal local variable table start_pc %d", start_bci); | |
1420 return; | |
1421 } | |
1422 u4 end_bci = (u4)(start_bci + length); | |
1423 if (end_bci != code_length) { | |
1424 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1425 class_format_error( "Illegal local variable table length %d", length); | |
1426 return; | |
1427 } | |
1428 } | |
1429 } | |
1430 } | |
1431 } | |
1432 | |
1433 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1434 StackMapFrame* current_frame, | |
1435 StackMapTable* stackmap_table, | |
1436 bool no_control_flow, TRAPS) { | |
1437 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1438 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1439 if (no_control_flow && this_offset > bci) { | |
1440 verify_error(bci, "Expecting a stack map frame"); | |
1441 return 0; | |
1442 } | |
1443 if (this_offset == bci) { | |
1444 // See if current stack map can be assigned to the frame in table. | |
1445 // current_frame is the stackmap frame got from the last instruction. | |
1446 // If matched, current_frame will be updated by this method. | |
1447 bool match = stackmap_table->match_stackmap( | |
1448 current_frame, this_offset, stackmap_index, | |
1449 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1450 if (!match) { | |
1451 // report type error | |
1452 verify_error(bci, "Instruction type does not match stack map"); | |
1453 return 0; | |
1454 } | |
1455 stackmap_index++; | |
1456 } else if (this_offset < bci) { | |
1457 // current_offset should have met this_offset. | |
1458 class_format_error("Bad stack map offset %d", this_offset); | |
1459 return 0; | |
1460 } | |
1461 } else if (no_control_flow) { | |
1462 verify_error(bci, "Expecting a stack map frame"); | |
1463 return 0; | |
1464 } | |
1465 return stackmap_index; | |
1466 } | |
1467 | |
1468 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1469 StackMapTable* stackmap_table, TRAPS) { | |
1470 constantPoolHandle cp (THREAD, _method->constants()); | |
1471 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1472 if (exhandlers() != NULL) { | |
1473 for(int i = 0; i < exhandlers->length();) { | |
1474 u2 start_pc = exhandlers->int_at(i++); | |
1475 u2 end_pc = exhandlers->int_at(i++); | |
1476 u2 handler_pc = exhandlers->int_at(i++); | |
1477 int catch_type_index = exhandlers->int_at(i++); | |
1478 if(bci >= start_pc && bci < end_pc) { | |
1479 u1 flags = current_frame->flags(); | |
1480 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1481 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1482 if (catch_type_index != 0) { | |
1483 // We know that this index refers to a subclass of Throwable | |
1484 VerificationType catch_type = cp_index_to_type( | |
1485 catch_type_index, cp, CHECK_VERIFY(this)); | |
1486 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1487 } else { | |
1488 VerificationType throwable = | |
1489 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1490 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1491 } | |
1492 bool match = stackmap_table->match_stackmap( | |
1493 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1494 if (!match) { | |
1495 verify_error(bci, | |
1496 "Stack map does not match the one at exception handler %d", | |
1497 handler_pc); | |
1498 return; | |
1499 } | |
1500 } | |
1501 } | |
1502 } | |
1503 } | |
1504 | |
1505 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1506 int nconstants = cp->length(); | |
1507 if ((index <= 0) || (index >= nconstants)) { | |
1508 verify_error("Illegal constant pool index %d in class %s", | |
1509 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1510 return; | |
1511 } | |
1512 } | |
1513 | |
1514 void ClassVerifier::verify_cp_type( | |
1515 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1516 | |
1517 // In some situations, bytecode rewriting may occur while we're verifying. | |
1518 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1519 // instead. Be sure we don't pick up such indices by accident. |
1520 // We must check was_recursively_verified() before we get here. | |
1521 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1522 |
1523 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1524 unsigned int tag = cp->tag_at(index).value(); | |
1525 if ((types & (1 << tag)) == 0) { | |
1526 verify_error( | |
1527 "Illegal type at constant pool entry %d in class %s", | |
1528 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1529 return; | |
1530 } | |
1531 } | |
1532 | |
1533 void ClassVerifier::verify_cp_class_type( | |
1534 int index, constantPoolHandle cp, TRAPS) { | |
1535 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1536 constantTag tag = cp->tag_at(index); | |
1537 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1538 verify_error("Illegal type at constant pool entry %d in class %s", | |
1539 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1540 return; | |
1541 } | |
1542 } | |
1543 | |
1544 void ClassVerifier::format_error_message( | |
1545 const char* fmt, int offset, va_list va) { | |
1546 ResourceMark rm(_thread); | |
1547 stringStream message(_message, _message_buffer_len); | |
1548 message.vprint(fmt, va); | |
1549 if (!_method.is_null()) { | |
1550 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1551 } | |
1552 if (offset != -1) { | |
1553 message.print(" at offset %d", offset); | |
1554 } | |
1555 } | |
1556 | |
1557 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1558 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1559 va_list va; | |
1560 va_start(va, fmt); | |
1561 format_error_message(fmt, offset, va); | |
1562 va_end(va); | |
1563 } | |
1564 | |
1565 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1566 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1567 va_list va; | |
1568 va_start(va, fmt); | |
1569 format_error_message(fmt, -1, va); | |
1570 va_end(va); | |
1571 } | |
1572 | |
1573 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1574 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1575 va_list va; | |
1576 va_start(va, msg); | |
1577 format_error_message(msg, -1, va); | |
1578 va_end(va); | |
1579 } | |
1580 | |
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1581 klassOop ClassVerifier::load_class(Symbol* name, TRAPS) { |
0 | 1582 // Get current loader and protection domain first. |
1583 oop loader = current_class()->class_loader(); | |
1584 oop protection_domain = current_class()->protection_domain(); | |
1585 | |
1586 return SystemDictionary::resolve_or_fail( | |
1587 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1588 true, CHECK_NULL); | |
1589 } | |
1590 | |
1591 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1592 klassOop target_class, | |
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1593 Symbol* field_name, |
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1594 Symbol* field_sig, |
0 | 1595 bool is_method) { |
1596 No_Safepoint_Verifier nosafepoint; | |
1597 | |
1598 // If target class isn't a super class of this class, we don't worry about this case | |
1599 if (!this_class->is_subclass_of(target_class)) { | |
1600 return false; | |
1601 } | |
1602 // Check if the specified method or field is protected | |
1603 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1604 fieldDescriptor fd; | |
1605 if (is_method) { | |
1606 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1607 if (m != NULL && m->is_protected()) { | |
1608 if (!this_class->is_same_class_package(m->method_holder())) { | |
1609 return true; | |
1610 } | |
1611 } | |
1612 } else { | |
1613 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1614 if(member_klass != NULL && fd.is_protected()) { | |
1615 if (!this_class->is_same_class_package(member_klass)) { | |
1616 return true; | |
1617 } | |
1618 } | |
1619 } | |
1620 return false; | |
1621 } | |
1622 | |
1623 void ClassVerifier::verify_ldc( | |
1624 int opcode, u2 index, StackMapFrame *current_frame, | |
1625 constantPoolHandle cp, u2 bci, TRAPS) { | |
1626 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1627 constantTag tag = cp->tag_at(index); | |
1628 unsigned int types; | |
1629 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1630 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1631 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1602 | 1632 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1633 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1634 // Note: The class file parser already verified the legality of | |
1635 // MethodHandle and MethodType constants. | |
0 | 1636 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
1637 } | |
1638 } else { | |
1639 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1640 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1641 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1642 } | |
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1643 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
1955
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1644 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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1645 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1646 current_frame->push_stack( |
1647 VerificationType::reference_type( | |
1648 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1649 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1650 current_frame->push_stack( | |
1651 VerificationType::reference_type( | |
1652 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1653 } else if (tag.is_int()) { | |
1654 current_frame->push_stack( | |
1655 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1656 } else if (tag.is_float()) { | |
1657 current_frame->push_stack( | |
1658 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1659 } else if (tag.is_double()) { | |
1660 current_frame->push_stack_2( | |
1661 VerificationType::double_type(), | |
1662 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1663 } else if (tag.is_long()) { | |
1664 current_frame->push_stack_2( | |
1665 VerificationType::long_type(), | |
1666 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 1667 } else if (tag.is_method_handle()) { |
1668 current_frame->push_stack( | |
1669 VerificationType::reference_type( | |
1670 vmSymbols::java_dyn_MethodHandle()), CHECK_VERIFY(this)); | |
1671 } else if (tag.is_method_type()) { | |
1672 current_frame->push_stack( | |
1673 VerificationType::reference_type( | |
1674 vmSymbols::java_dyn_MethodType()), CHECK_VERIFY(this)); | |
0 | 1675 } else { |
1676 verify_error(bci, "Invalid index in ldc"); | |
1677 return; | |
1678 } | |
1679 } | |
1680 | |
1681 void ClassVerifier::verify_switch( | |
1682 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1683 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1684 int bci = bcs->bci(); | |
1685 address bcp = bcs->bcp(); | |
1686 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1687 | |
1688 // 4639449 & 4647081: padding bytes must be 0 | |
1689 u2 padding_offset = 1; | |
1690 while ((bcp + padding_offset) < aligned_bcp) { | |
1691 if(*(bcp + padding_offset) != 0) { | |
1692 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1693 return; | |
1694 } | |
1695 padding_offset++; | |
1696 } | |
1697 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1698 int keys, delta; | |
1699 current_frame->pop_stack( | |
1700 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 1701 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 1702 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
1703 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1704 if (low > high) { | |
1705 verify_error(bci, | |
1706 "low must be less than or equal to high in tableswitch"); | |
1707 return; | |
1708 } | |
1709 keys = high - low + 1; | |
1710 if (keys < 0) { | |
1711 verify_error(bci, "too many keys in tableswitch"); | |
1712 return; | |
1713 } | |
1714 delta = 1; | |
1715 } else { | |
1716 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1717 if (keys < 0) { | |
1718 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1719 return; | |
1720 } | |
1721 delta = 2; | |
1722 // Make sure that the lookupswitch items are sorted | |
1723 for (int i = 0; i < (keys - 1); i++) { | |
1724 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1725 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1726 if (this_key >= next_key) { | |
1727 verify_error(bci, "Bad lookupswitch instruction"); | |
1728 return; | |
1729 } | |
1730 } | |
1731 } | |
1732 int target = bci + default_offset; | |
1733 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1734 for (int i = 0; i < keys; i++) { | |
1735 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1736 stackmap_table->check_jump_target( | |
1737 current_frame, target, CHECK_VERIFY(this)); | |
1738 } | |
1739 } | |
1740 | |
1741 bool ClassVerifier::name_in_supers( | |
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1742 Symbol* ref_name, instanceKlassHandle current) { |
0 | 1743 klassOop super = current->super(); |
1744 while (super != NULL) { | |
1745 if (super->klass_part()->name() == ref_name) { | |
1746 return true; | |
1747 } | |
1748 super = super->klass_part()->super(); | |
1749 } | |
1750 return false; | |
1751 } | |
1752 | |
1753 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1754 StackMapFrame* current_frame, | |
1755 constantPoolHandle cp, | |
1756 TRAPS) { | |
1565 | 1757 u2 index = bcs->get_index_u2(); |
0 | 1758 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); |
1759 | |
1760 // Get field name and signature | |
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1761 Symbol* field_name = cp->name_ref_at(index); |
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1762 Symbol* field_sig = cp->signature_ref_at(index); |
0 | 1763 |
1764 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1765 class_format_error( | |
1766 "Invalid signature for field in class %s referenced " | |
1767 "from constant pool index %d", _klass->external_name(), index); | |
1768 return; | |
1769 } | |
1770 | |
1771 // Get referenced class type | |
1772 VerificationType ref_class_type = cp_ref_index_to_type( | |
1773 index, cp, CHECK_VERIFY(this)); | |
1774 if (!ref_class_type.is_object()) { | |
1775 verify_error( | |
1776 "Expecting reference to class in class %s at constant pool index %d", | |
1777 _klass->external_name(), index); | |
1778 return; | |
1779 } | |
1780 VerificationType target_class_type = ref_class_type; | |
1781 | |
1782 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1783 "buffer type must match VerificationType size"); | |
1784 uintptr_t field_type_buffer[2]; | |
1785 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1786 // If we make a VerificationType[2] array directly, the compiler calls | |
1787 // to the c-runtime library to do the allocation instead of just | |
1788 // stack allocating it. Plus it would run constructors. This shows up | |
1789 // in performance profiles. | |
1790 | |
1791 SignatureStream sig_stream(field_sig, false); | |
1792 VerificationType stack_object_type; | |
1793 int n = change_sig_to_verificationType( | |
1794 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1795 u2 bci = bcs->bci(); | |
1796 bool is_assignable; | |
1565 | 1797 switch (bcs->raw_code()) { |
0 | 1798 case Bytecodes::_getstatic: { |
1799 for (int i = 0; i < n; i++) { | |
1800 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1801 } | |
1802 break; | |
1803 } | |
1804 case Bytecodes::_putstatic: { | |
1805 for (int i = n - 1; i >= 0; i--) { | |
1806 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1807 } | |
1808 break; | |
1809 } | |
1810 case Bytecodes::_getfield: { | |
1811 stack_object_type = current_frame->pop_stack( | |
1812 target_class_type, CHECK_VERIFY(this)); | |
1813 for (int i = 0; i < n; i++) { | |
1814 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1815 } | |
1816 goto check_protected; | |
1817 } | |
1818 case Bytecodes::_putfield: { | |
1819 for (int i = n - 1; i >= 0; i--) { | |
1820 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1821 } | |
1822 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1823 | |
1824 // The JVMS 2nd edition allows field initialization before the superclass | |
1825 // initializer, if the field is defined within the current class. | |
1826 fieldDescriptor fd; | |
1827 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1828 target_class_type.equals(current_type()) && | |
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1829 _klass->find_local_field(field_name, field_sig, &fd)) { |
0 | 1830 stack_object_type = current_type(); |
1831 } | |
1832 is_assignable = target_class_type.is_assignable_from( | |
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1833 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 1834 if (!is_assignable) { |
1835 verify_error(bci, "Bad type on operand stack in putfield"); | |
1836 return; | |
1837 } | |
1838 } | |
1839 check_protected: { | |
1840 if (_this_type == stack_object_type) | |
1841 break; // stack_object_type must be assignable to _current_class_type | |
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1842 Symbol* ref_class_name = |
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1843 cp->klass_name_at(cp->klass_ref_index_at(index)); |
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1844 if (!name_in_supers(ref_class_name, current_class())) |
0 | 1845 // stack_object_type must be assignable to _current_class_type since: |
1846 // 1. stack_object_type must be assignable to ref_class. | |
1847 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1848 // be a superclass of it. See revised JVMS 5.4.4. | |
1849 break; | |
1850 | |
1851 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
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1852 if (is_protected_access(current_class(), ref_class_oop, field_name, |
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1853 field_sig, false)) { |
0 | 1854 // It's protected access, check if stack object is assignable to |
1855 // current class. | |
1856 is_assignable = current_type().is_assignable_from( | |
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1857 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 1858 if (!is_assignable) { |
1859 verify_error(bci, "Bad access to protected data in getfield"); | |
1860 return; | |
1861 } | |
1862 } | |
1863 break; | |
1864 } | |
1865 default: ShouldNotReachHere(); | |
1866 } | |
1867 } | |
1868 | |
1869 void ClassVerifier::verify_invoke_init( | |
1870 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1871 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1872 constantPoolHandle cp, TRAPS) { | |
1873 u2 bci = bcs->bci(); | |
1874 VerificationType type = current_frame->pop_stack( | |
1875 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1876 if (type == VerificationType::uninitialized_this_type()) { | |
1877 // The method must be an <init> method of either this class, or one of its | |
1878 // superclasses | |
1677 | 1879 if (ref_class_type.name() != current_class()->name() && |
1880 !name_in_supers(ref_class_type.name(), current_class())) { | |
0 | 1881 verify_error(bci, "Bad <init> method call"); |
1882 return; | |
1883 } | |
1884 current_frame->initialize_object(type, current_type()); | |
1885 *this_uninit = true; | |
1886 } else if (type.is_uninitialized()) { | |
1887 u2 new_offset = type.bci(); | |
1888 address new_bcp = bcs->bcp() - bci + new_offset; | |
1889 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1890 verify_error(new_offset, "Expecting new instruction"); | |
1891 return; | |
1892 } | |
1893 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1894 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1895 | |
1896 // The method must be an <init> method of the indicated class | |
1897 VerificationType new_class_type = cp_index_to_type( | |
1898 new_class_index, cp, CHECK_VERIFY(this)); | |
1899 if (!new_class_type.equals(ref_class_type)) { | |
1900 verify_error(bci, "Call to wrong <init> method"); | |
1901 return; | |
1902 } | |
1903 // According to the VM spec, if the referent class is a superclass of the | |
1904 // current class, and is in a different runtime package, and the method is | |
1905 // protected, then the objectref must be the current class or a subclass | |
1906 // of the current class. | |
1907 VerificationType objectref_type = new_class_type; | |
1908 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1909 klassOop ref_klass = load_class( | |
1910 ref_class_type.name(), CHECK_VERIFY(this)); | |
1911 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1912 vmSymbols::object_initializer_name(), | |
1565 | 1913 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 1914 instanceKlassHandle mh(THREAD, m->method_holder()); |
1915 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1916 bool assignable = current_type().is_assignable_from( | |
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1917 objectref_type, this, CHECK_VERIFY(this)); |
0 | 1918 if (!assignable) { |
1919 verify_error(bci, "Bad access to protected <init> method"); | |
1920 return; | |
1921 } | |
1922 } | |
1923 } | |
1924 current_frame->initialize_object(type, new_class_type); | |
1925 } else { | |
1926 verify_error(bci, "Bad operand type when invoking <init>"); | |
1927 return; | |
1928 } | |
1929 } | |
1930 | |
1931 void ClassVerifier::verify_invoke_instructions( | |
1932 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1933 bool *this_uninit, VerificationType return_type, | |
1934 constantPoolHandle cp, TRAPS) { | |
1935 // Make sure the constant pool item is the right type | |
1565 | 1936 u2 index = bcs->get_index_u2(); |
1937 Bytecodes::Code opcode = bcs->raw_code(); | |
0 | 1938 unsigned int types = (opcode == Bytecodes::_invokeinterface |
1939 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1940 : opcode == Bytecodes::_invokedynamic |
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1941 ? ((AllowTransitionalJSR292 ? 1 << JVM_CONSTANT_NameAndType : 0) |
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1942 |1 << JVM_CONSTANT_InvokeDynamic) |
0 | 1943 : 1 << JVM_CONSTANT_Methodref); |
1944 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1945 | |
1946 // Get method name and signature | |
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1947 Symbol* method_name = cp->name_ref_at(index); |
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1948 Symbol* method_sig = cp->signature_ref_at(index); |
0 | 1949 |
1950 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1951 class_format_error( | |
1952 "Invalid method signature in class %s referenced " | |
1953 "from constant pool index %d", _klass->external_name(), index); | |
1954 return; | |
1955 } | |
1956 | |
1957 // Get referenced class type | |
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1958 VerificationType ref_class_type; |
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1959 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 1960 if (!EnableInvokeDynamic || |
1961 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
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1962 class_format_error( |
1602 | 1963 (!EnableInvokeDynamic ? |
1964 "invokedynamic instructions not enabled in this JVM" : | |
1965 "invokedynamic instructions not supported by this class file version"), | |
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1966 _klass->external_name()); |
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1967 return; |
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1968 } |
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1969 } else { |
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1970 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1971 } |
0 | 1972 |
1973 // For a small signature length, we just allocate 128 bytes instead | |
1974 // of parsing the signature once to find its size. | |
1975 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1976 // longs/doubles to be consertive. | |
1977 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1978 "buffer type must match VerificationType size"); | |
1979 uintptr_t on_stack_sig_types_buffer[128]; | |
1980 // If we make a VerificationType[128] array directly, the compiler calls | |
1981 // to the c-runtime library to do the allocation instead of just | |
1982 // stack allocating it. Plus it would run constructors. This shows up | |
1983 // in performance profiles. | |
1984 | |
1985 VerificationType* sig_types; | |
1986 int size = (method_sig->utf8_length() - 3) * 2; | |
1987 if (size > 128) { | |
1988 // Long and double occupies two slots here. | |
1989 ArgumentSizeComputer size_it(method_sig); | |
1990 size = size_it.size(); | |
1991 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1992 } else{ | |
1993 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1994 } | |
1995 SignatureStream sig_stream(method_sig); | |
1996 int sig_i = 0; | |
1997 while (!sig_stream.at_return_type()) { | |
1998 sig_i += change_sig_to_verificationType( | |
1999 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
2000 sig_stream.next(); | |
2001 } | |
2002 int nargs = sig_i; | |
2003 | |
2004 #ifdef ASSERT | |
2005 { | |
2006 ArgumentSizeComputer size_it(method_sig); | |
2007 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
2008 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
2009 } | |
2010 #endif | |
2011 | |
2012 // Check instruction operands | |
2013 u2 bci = bcs->bci(); | |
2014 if (opcode == Bytecodes::_invokeinterface) { | |
2015 address bcp = bcs->bcp(); | |
2016 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
2017 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
2018 // the difference between the size of the operand stack before and after the instruction | |
2019 // executes. | |
2020 if (*(bcp+3) != (nargs+1)) { | |
2021 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
2022 return; | |
2023 } | |
2024 if (*(bcp+4) != 0) { | |
2025 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
2026 return; | |
2027 } | |
2028 } | |
2029 | |
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2030 if (opcode == Bytecodes::_invokedynamic) { |
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2031 address bcp = bcs->bcp(); |
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2032 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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2033 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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2034 return; |
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2035 } |
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2036 } |
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2037 |
0 | 2038 if (method_name->byte_at(0) == '<') { |
2039 // Make sure <init> can only be invoked by invokespecial | |
2040 if (opcode != Bytecodes::_invokespecial || | |
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2041 method_name != vmSymbols::object_initializer_name()) { |
0 | 2042 verify_error(bci, "Illegal call to internal method"); |
2043 return; | |
2044 } | |
2045 } else if (opcode == Bytecodes::_invokespecial | |
2046 && !ref_class_type.equals(current_type()) | |
2047 && !ref_class_type.equals(VerificationType::reference_type( | |
2048 current_class()->super()->klass_part()->name()))) { | |
2049 bool subtype = ref_class_type.is_assignable_from( | |
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2050 current_type(), this, CHECK_VERIFY(this)); |
0 | 2051 if (!subtype) { |
2052 verify_error(bci, "Bad invokespecial instruction: " | |
2053 "current class isn't assignable to reference class."); | |
2054 return; | |
2055 } | |
2056 } | |
2057 // Match method descriptor with operand stack | |
2058 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2059 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2060 } | |
2061 // Check objectref on operand stack | |
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2062 if (opcode != Bytecodes::_invokestatic && |
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2063 opcode != Bytecodes::_invokedynamic) { |
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2064 if (method_name == vmSymbols::object_initializer_name()) { // <init> method |
0 | 2065 verify_invoke_init(bcs, ref_class_type, current_frame, |
2066 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2067 } else { // other methods | |
2068 // Ensures that target class is assignable to method class. | |
2069 if (opcode == Bytecodes::_invokespecial) { | |
2070 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2071 } else if (opcode == Bytecodes::_invokevirtual) { | |
2072 VerificationType stack_object_type = | |
2073 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2074 if (current_type() != stack_object_type) { | |
2075 assert(cp->cache() == NULL, "not rewritten yet"); | |
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2076 Symbol* ref_class_name = |
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2077 cp->klass_name_at(cp->klass_ref_index_at(index)); |
0 | 2078 // See the comments in verify_field_instructions() for |
2079 // the rationale behind this. | |
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2080 if (name_in_supers(ref_class_name, current_class())) { |
0 | 2081 klassOop ref_class = load_class(ref_class_name, CHECK); |
2082 if (is_protected_access( | |
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2083 _klass, ref_class, method_name, method_sig, true)) { |
0 | 2084 // It's protected access, check if stack object is |
2085 // assignable to current class. | |
2086 bool is_assignable = current_type().is_assignable_from( | |
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2087 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2088 if (!is_assignable) { |
2089 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2090 && stack_object_type.is_array() | |
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2091 && method_name == vmSymbols::clone_name()) { |
0 | 2092 // Special case: arrays pretend to implement public Object |
2093 // clone(). | |
2094 } else { | |
2095 verify_error(bci, | |
2096 "Bad access to protected data in invokevirtual"); | |
2097 return; | |
2098 } | |
2099 } | |
2100 } | |
2101 } | |
2102 } | |
2103 } else { | |
2104 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2105 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2106 } | |
2107 } | |
2108 } | |
2109 // Push the result type. | |
2110 if (sig_stream.type() != T_VOID) { | |
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2111 if (method_name == vmSymbols::object_initializer_name()) { |
0 | 2112 // <init> method must have a void return type |
2113 verify_error(bci, "Return type must be void in <init> method"); | |
2114 return; | |
2115 } | |
2116 VerificationType return_type[2]; | |
2117 int n = change_sig_to_verificationType( | |
2118 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2119 for (int i = 0; i < n; i++) { | |
2120 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2121 } | |
2122 } | |
2123 } | |
2124 | |
2125 VerificationType ClassVerifier::get_newarray_type( | |
2126 u2 index, u2 bci, TRAPS) { | |
2127 const char* from_bt[] = { | |
2128 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2129 }; | |
2130 if (index < T_BOOLEAN || index > T_LONG) { | |
2131 verify_error(bci, "Illegal newarray instruction"); | |
2132 return VerificationType::bogus_type(); | |
2133 } | |
2134 | |
2135 // from_bt[index] contains the array signature which has a length of 2 | |
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2136 Symbol* sig = create_temporary_symbol( |
0 | 2137 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); |
2138 return VerificationType::reference_type(sig); | |
2139 } | |
2140 | |
2141 void ClassVerifier::verify_anewarray( | |
2142 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2143 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2144 current_frame->pop_stack( | |
2145 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2146 | |
2147 VerificationType component_type = | |
2148 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2149 int length; | |
2150 char* arr_sig_str; | |
2151 if (component_type.is_array()) { // it's an array | |
2152 const char* component_name = component_type.name()->as_utf8(); | |
2153 // add one dimension to component | |
2154 length = (int)strlen(component_name) + 1; | |
2155 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2156 arr_sig_str[0] = '['; | |
2157 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2158 } else { // it's an object or interface | |
2159 const char* component_name = component_type.name()->as_utf8(); | |
2160 // add one dimension to component with 'L' prepended and ';' postpended. | |
2161 length = (int)strlen(component_name) + 3; | |
2162 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2163 arr_sig_str[0] = '['; | |
2164 arr_sig_str[1] = 'L'; | |
2165 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2166 arr_sig_str[length - 1] = ';'; | |
2167 } | |
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2168 Symbol* arr_sig = create_temporary_symbol( |
0 | 2169 arr_sig_str, length, CHECK_VERIFY(this)); |
2170 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2171 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2172 } | |
2173 | |
2174 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2175 current_frame->get_local( | |
2176 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2177 current_frame->push_stack( | |
2178 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2179 } | |
2180 | |
2181 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2182 current_frame->get_local_2( | |
2183 index, VerificationType::long_type(), | |
2184 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2185 current_frame->push_stack_2( | |
2186 VerificationType::long_type(), | |
2187 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2188 } | |
2189 | |
2190 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2191 current_frame->get_local( | |
2192 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2193 current_frame->push_stack( | |
2194 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2195 } | |
2196 | |
2197 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2198 current_frame->get_local_2( | |
2199 index, VerificationType::double_type(), | |
2200 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2201 current_frame->push_stack_2( | |
2202 VerificationType::double_type(), | |
2203 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2204 } | |
2205 | |
2206 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2207 VerificationType type = current_frame->get_local( | |
2208 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2209 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2210 } | |
2211 | |
2212 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2213 current_frame->pop_stack( | |
2214 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2215 current_frame->set_local( | |
2216 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2217 } | |
2218 | |
2219 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2220 current_frame->pop_stack_2( | |
2221 VerificationType::long2_type(), | |
2222 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2223 current_frame->set_local_2( | |
2224 index, VerificationType::long_type(), | |
2225 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2226 } | |
2227 | |
2228 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2229 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2230 current_frame->set_local( | |
2231 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2232 } | |
2233 | |
2234 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2235 current_frame->pop_stack_2( | |
2236 VerificationType::double2_type(), | |
2237 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2238 current_frame->set_local_2( | |
2239 index, VerificationType::double_type(), | |
2240 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2241 } | |
2242 | |
2243 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2244 VerificationType type = current_frame->pop_stack( | |
2245 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2246 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2247 } | |
2248 | |
2249 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2250 VerificationType type = current_frame->get_local( | |
2251 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2252 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2253 } | |
2254 | |
2255 void ClassVerifier::verify_return_value( | |
2256 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2257 if (return_type == VerificationType::bogus_type()) { | |
2258 verify_error(bci, "Method expects a return value"); | |
2259 return; | |
2260 } | |
2177
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2261 bool match = return_type.is_assignable_from(type, this, CHECK_VERIFY(this)); |
0 | 2262 if (!match) { |
2263 verify_error(bci, "Bad return type"); | |
2264 return; | |
2265 } | |
2266 } | |
2177
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2267 |
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2268 // The verifier creates symbols which are substrings of Symbols. |
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2269 // These are stored in the verifier until the end of verification so that |
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2270 // they can be reference counted. |
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2271 Symbol* ClassVerifier::create_temporary_symbol(const Symbol *s, int begin, |
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2272 int end, TRAPS) { |
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2273 Symbol* sym = SymbolTable::new_symbol(s, begin, end, CHECK_NULL); |
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2274 _symbols->push(sym); |
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2275 return sym; |
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2276 } |
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2277 |
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2278 Symbol* ClassVerifier::create_temporary_symbol(const char *s, int length, TRAPS) { |
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2279 Symbol* sym = SymbolTable::new_symbol(s, length, CHECK_NULL); |
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2280 _symbols->push(sym); |
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2281 return sym; |
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2282 } |