Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/verifier.cpp @ 1955:1070423b51f3
6865028: Illegal instructions passing verification prior to 'invokespecial Object.<init>'
Summary: Update verifier to conform to spec re: reference vs. 'Object' types
Reviewed-by: dholmes, coleenp
author | kamg |
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date | Wed, 27 Oct 2010 12:53:36 -0400 |
parents | 7f0fdccac34f |
children | 9752a6549f2e |
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 * | |
1552
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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 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_verifier.cpp.incl" | |
27 | |
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28 #define NOFAILOVER_MAJOR_VERSION 51 |
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29 |
0 | 30 // Access to external entry for VerifyClassCodes - old byte code verifier |
31 | |
32 extern "C" { | |
33 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
34 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
35 } | |
36 | |
37 static void* volatile _verify_byte_codes_fn = NULL; | |
38 | |
39 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
40 | |
41 static void* verify_byte_codes_fn() { | |
42 if (_verify_byte_codes_fn == NULL) { | |
43 void *lib_handle = os::native_java_library(); | |
44 void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); | |
45 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
46 if (func == NULL) { | |
47 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
48 func = hpi::dll_lookup(lib_handle, "VerifyClassCodes"); | |
49 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
50 } | |
51 } | |
52 return (void*)_verify_byte_codes_fn; | |
53 } | |
54 | |
55 | |
56 // Methods in Verifier | |
57 | |
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58 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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59 return (class_loader == NULL || !should_verify_class) ? |
0 | 60 BytecodeVerificationLocal : BytecodeVerificationRemote; |
61 } | |
62 | |
63 bool Verifier::relax_verify_for(oop loader) { | |
64 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
65 bool need_verify = | |
66 // verifyAll | |
67 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
68 // verifyRemote | |
69 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
70 return !need_verify; | |
71 } | |
72 | |
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73 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
0 | 74 ResourceMark rm(THREAD); |
75 HandleMark hm; | |
76 | |
77 symbolHandle exception_name; | |
78 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; | |
79 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
80 | |
81 const char* klassName = klass->external_name(); | |
82 | |
83 // If the class should be verified, first see if we can use the split | |
84 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
85 // is set, then call the inference verifier. | |
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86 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 87 if (TraceClassInitialization) { |
88 tty->print_cr("Start class verification for: %s", klassName); | |
89 } | |
90 if (UseSplitVerifier && | |
91 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
92 ClassVerifier split_verifier( | |
93 klass, message_buffer, message_buffer_len, THREAD); | |
94 split_verifier.verify_class(THREAD); | |
95 exception_name = split_verifier.result(); | |
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96 if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && |
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97 FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && |
0 | 98 (exception_name == vmSymbols::java_lang_VerifyError() || |
99 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
100 if (TraceClassInitialization) { | |
101 tty->print_cr( | |
102 "Fail over class verification to old verifier for: %s", klassName); | |
103 } | |
104 exception_name = inference_verify( | |
105 klass, message_buffer, message_buffer_len, THREAD); | |
106 } | |
107 } else { | |
108 exception_name = inference_verify( | |
109 klass, message_buffer, message_buffer_len, THREAD); | |
110 } | |
111 | |
112 if (TraceClassInitialization) { | |
113 if (HAS_PENDING_EXCEPTION) { | |
114 tty->print("Verification for %s has", klassName); | |
115 tty->print_cr(" exception pending %s ", | |
116 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
117 } else if (!exception_name.is_null()) { | |
118 tty->print_cr("Verification for %s failed", klassName); | |
119 } | |
120 tty->print_cr("End class verification for: %s", klassName); | |
121 } | |
122 } | |
123 | |
124 if (HAS_PENDING_EXCEPTION) { | |
125 return false; // use the existing exception | |
126 } else if (exception_name.is_null()) { | |
127 return true; // verifcation succeeded | |
128 } else { // VerifyError or ClassFormatError to be created and thrown | |
129 ResourceMark rm(THREAD); | |
130 instanceKlassHandle kls = | |
131 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
132 while (!kls.is_null()) { | |
133 if (kls == klass) { | |
134 // If the class being verified is the exception we're creating | |
135 // or one of it's superclasses, we're in trouble and are going | |
136 // to infinitely recurse when we try to initialize the exception. | |
137 // So bail out here by throwing the preallocated VM error. | |
138 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
139 } | |
140 kls = kls->super(); | |
141 } | |
142 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
143 THROW_MSG_(exception_name, message_buffer, false); | |
144 } | |
145 } | |
146 | |
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147 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
0 | 148 symbolOop name = klass->name(); |
1142 | 149 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 150 |
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151 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 152 // return if the class is a bootstrapping class |
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153 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 154 // We need to skip the following four for bootstraping |
155 name != vmSymbols::java_lang_Object() && | |
156 name != vmSymbols::java_lang_Class() && | |
157 name != vmSymbols::java_lang_String() && | |
158 name != vmSymbols::java_lang_Throwable() && | |
159 | |
160 // Can not verify the bytecodes for shared classes because they have | |
161 // already been rewritten to contain constant pool cache indices, | |
162 // which the verifier can't understand. | |
163 // Shared classes shouldn't have stackmaps either. | |
164 !klass()->is_shared() && | |
165 | |
166 // As of the fix for 4486457 we disable verification for all of the | |
167 // dynamically-generated bytecodes associated with the 1.4 | |
168 // reflection implementation, not just those associated with | |
169 // sun/reflect/SerializationConstructorAccessor. | |
170 // NOTE: this is called too early in the bootstrapping process to be | |
171 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
172 (refl_magic_klass == NULL || | |
173 !klass->is_subtype_of(refl_magic_klass) || | |
174 VerifyReflectionBytecodes) | |
175 ); | |
176 } | |
177 | |
178 symbolHandle Verifier::inference_verify( | |
179 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { | |
180 JavaThread* thread = (JavaThread*)THREAD; | |
181 JNIEnv *env = thread->jni_environment(); | |
182 | |
183 void* verify_func = verify_byte_codes_fn(); | |
184 | |
185 if (verify_func == NULL) { | |
186 jio_snprintf(message, message_len, "Could not link verifier"); | |
187 return vmSymbols::java_lang_VerifyError(); | |
188 } | |
189 | |
190 ResourceMark rm(THREAD); | |
191 if (ClassVerifier::_verify_verbose) { | |
192 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
193 } | |
194 | |
195 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
196 jint result; | |
197 | |
198 { | |
199 HandleMark hm(thread); | |
200 ThreadToNativeFromVM ttn(thread); | |
201 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
202 // code knows that we have left the VM | |
203 | |
204 if (_is_new_verify_byte_codes_fn) { | |
205 verify_byte_codes_fn_new_t func = | |
206 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
207 result = (*func)(env, cls, message, (int)message_len, | |
208 klass->major_version()); | |
209 } else { | |
210 verify_byte_codes_fn_t func = | |
211 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
212 result = (*func)(env, cls, message, (int)message_len); | |
213 } | |
214 } | |
215 | |
216 JNIHandles::destroy_local(cls); | |
217 | |
218 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
219 // to be changed (still return jboolean (unsigned char)), and result is | |
220 // 1 when verification is passed. | |
221 symbolHandle nh(NULL); | |
222 if (result == 0) { | |
223 return vmSymbols::java_lang_VerifyError(); | |
224 } else if (result == 1) { | |
225 return nh; // verified. | |
226 } else if (result == 2) { | |
227 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); | |
228 } else if (result == 3) { | |
229 return vmSymbols::java_lang_ClassFormatError(); | |
230 } else { | |
231 ShouldNotReachHere(); | |
232 return nh; | |
233 } | |
234 } | |
235 | |
236 // Methods in ClassVerifier | |
237 | |
238 bool ClassVerifier::_verify_verbose = false; | |
239 | |
240 ClassVerifier::ClassVerifier( | |
241 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
242 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), | |
243 _message_buffer_len(msg_len), _klass(klass) { | |
244 _this_type = VerificationType::reference_type(klass->name()); | |
245 } | |
246 | |
247 ClassVerifier::~ClassVerifier() { | |
248 } | |
249 | |
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250 VerificationType ClassVerifier::object_type() const { |
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251 return VerificationType::reference_type(vmSymbols::java_lang_Object()); |
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252 } |
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253 |
0 | 254 void ClassVerifier::verify_class(TRAPS) { |
255 if (_verify_verbose) { | |
256 tty->print_cr("Verifying class %s with new format", | |
257 _klass->external_name()); | |
258 } | |
259 | |
260 objArrayHandle methods(THREAD, _klass->methods()); | |
261 int num_methods = methods->length(); | |
262 | |
263 for (int index = 0; index < num_methods; index++) { | |
1570 | 264 // Check for recursive re-verification before each method. |
265 if (was_recursively_verified()) return; | |
266 | |
0 | 267 methodOop m = (methodOop)methods->obj_at(index); |
268 if (m->is_native() || m->is_abstract()) { | |
269 // If m is native or abstract, skip it. It is checked in class file | |
270 // parser that methods do not override a final method. | |
271 continue; | |
272 } | |
273 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
274 } | |
1570 | 275 |
276 if (_verify_verbose || TraceClassInitialization) { | |
277 if (was_recursively_verified()) | |
278 tty->print_cr("Recursive verification detected for: %s", | |
279 _klass->external_name()); | |
280 } | |
0 | 281 } |
282 | |
283 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
284 ResourceMark rm(THREAD); | |
285 _method = m; // initialize _method | |
286 if (_verify_verbose) { | |
287 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
288 } | |
289 | |
290 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
291 | |
292 int32_t max_stack = m->max_stack(); | |
293 int32_t max_locals = m->max_locals(); | |
294 constantPoolHandle cp(THREAD, m->constants()); | |
295 | |
296 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
297 class_format_error("Invalid method signature"); | |
298 return; | |
299 } | |
300 | |
301 // Initial stack map frame: offset is 0, stack is initially empty. | |
302 StackMapFrame current_frame(max_locals, max_stack, this); | |
303 // Set initial locals | |
304 VerificationType return_type = current_frame.set_locals_from_arg( | |
305 m, current_type(), CHECK_VERIFY(this)); | |
306 | |
307 int32_t stackmap_index = 0; // index to the stackmap array | |
308 | |
309 u4 code_length = m->code_size(); | |
310 | |
311 // Scan the bytecode and map each instruction's start offset to a number. | |
312 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
313 | |
314 int ex_min = code_length; | |
315 int ex_max = -1; | |
316 // Look through each item on the exception table. Each of the fields must refer | |
317 // to a legal instruction. | |
318 verify_exception_handler_table( | |
319 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
320 | |
321 // Look through each entry on the local variable table and make sure | |
322 // its range of code array offsets is valid. (4169817) | |
323 if (m->has_localvariable_table()) { | |
324 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
325 } | |
326 | |
327 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
328 StackMapStream stream(stackmap_data); | |
329 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
330 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
331 code_data, code_length, CHECK_VERIFY(this)); | |
332 | |
333 if (_verify_verbose) { | |
334 stackmap_table.print(); | |
335 } | |
336 | |
337 RawBytecodeStream bcs(m); | |
338 | |
339 // Scan the byte code linearly from the start to the end | |
340 bool no_control_flow = false; // Set to true when there is no direct control | |
341 // flow from current instruction to the next | |
342 // instruction in sequence | |
343 Bytecodes::Code opcode; | |
344 while (!bcs.is_last_bytecode()) { | |
1570 | 345 // Check for recursive re-verification before each bytecode. |
346 if (was_recursively_verified()) return; | |
347 | |
0 | 348 opcode = bcs.raw_next(); |
349 u2 bci = bcs.bci(); | |
350 | |
351 // Set current frame's offset to bci | |
352 current_frame.set_offset(bci); | |
353 | |
354 // Make sure every offset in stackmap table point to the beginning to | |
355 // an instruction. Match current_frame to stackmap_table entry with | |
356 // the same offset if exists. | |
357 stackmap_index = verify_stackmap_table( | |
358 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
359 no_control_flow, CHECK_VERIFY(this)); | |
360 | |
361 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
362 | |
363 // Merge with the next instruction | |
364 { | |
365 u2 index; | |
366 int target; | |
367 VerificationType type, type2; | |
368 VerificationType atype; | |
369 | |
370 #ifndef PRODUCT | |
371 if (_verify_verbose) { | |
372 current_frame.print(); | |
373 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
374 } | |
375 #endif | |
376 | |
377 // Make sure wide instruction is in correct format | |
378 if (bcs.is_wide()) { | |
379 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
380 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
381 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
382 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
383 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
384 opcode != Bytecodes::_dstore) { | |
385 verify_error(bci, "Bad wide instruction"); | |
386 return; | |
387 } | |
388 } | |
389 | |
390 switch (opcode) { | |
391 case Bytecodes::_nop : | |
392 no_control_flow = false; break; | |
393 case Bytecodes::_aconst_null : | |
394 current_frame.push_stack( | |
395 VerificationType::null_type(), CHECK_VERIFY(this)); | |
396 no_control_flow = false; break; | |
397 case Bytecodes::_iconst_m1 : | |
398 case Bytecodes::_iconst_0 : | |
399 case Bytecodes::_iconst_1 : | |
400 case Bytecodes::_iconst_2 : | |
401 case Bytecodes::_iconst_3 : | |
402 case Bytecodes::_iconst_4 : | |
403 case Bytecodes::_iconst_5 : | |
404 current_frame.push_stack( | |
405 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
406 no_control_flow = false; break; | |
407 case Bytecodes::_lconst_0 : | |
408 case Bytecodes::_lconst_1 : | |
409 current_frame.push_stack_2( | |
410 VerificationType::long_type(), | |
411 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
412 no_control_flow = false; break; | |
413 case Bytecodes::_fconst_0 : | |
414 case Bytecodes::_fconst_1 : | |
415 case Bytecodes::_fconst_2 : | |
416 current_frame.push_stack( | |
417 VerificationType::float_type(), CHECK_VERIFY(this)); | |
418 no_control_flow = false; break; | |
419 case Bytecodes::_dconst_0 : | |
420 case Bytecodes::_dconst_1 : | |
421 current_frame.push_stack_2( | |
422 VerificationType::double_type(), | |
423 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
424 no_control_flow = false; break; | |
425 case Bytecodes::_sipush : | |
426 case Bytecodes::_bipush : | |
427 current_frame.push_stack( | |
428 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
429 no_control_flow = false; break; | |
430 case Bytecodes::_ldc : | |
431 verify_ldc( | |
1565 | 432 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 433 cp, bci, CHECK_VERIFY(this)); |
434 no_control_flow = false; break; | |
435 case Bytecodes::_ldc_w : | |
436 case Bytecodes::_ldc2_w : | |
437 verify_ldc( | |
1565 | 438 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 439 cp, bci, CHECK_VERIFY(this)); |
440 no_control_flow = false; break; | |
441 case Bytecodes::_iload : | |
442 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
443 no_control_flow = false; break; | |
444 case Bytecodes::_iload_0 : | |
445 case Bytecodes::_iload_1 : | |
446 case Bytecodes::_iload_2 : | |
447 case Bytecodes::_iload_3 : | |
448 index = opcode - Bytecodes::_iload_0; | |
449 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
450 no_control_flow = false; break; | |
451 case Bytecodes::_lload : | |
452 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
453 no_control_flow = false; break; | |
454 case Bytecodes::_lload_0 : | |
455 case Bytecodes::_lload_1 : | |
456 case Bytecodes::_lload_2 : | |
457 case Bytecodes::_lload_3 : | |
458 index = opcode - Bytecodes::_lload_0; | |
459 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
460 no_control_flow = false; break; | |
461 case Bytecodes::_fload : | |
462 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
463 no_control_flow = false; break; | |
464 case Bytecodes::_fload_0 : | |
465 case Bytecodes::_fload_1 : | |
466 case Bytecodes::_fload_2 : | |
467 case Bytecodes::_fload_3 : | |
468 index = opcode - Bytecodes::_fload_0; | |
469 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
470 no_control_flow = false; break; | |
471 case Bytecodes::_dload : | |
472 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
473 no_control_flow = false; break; | |
474 case Bytecodes::_dload_0 : | |
475 case Bytecodes::_dload_1 : | |
476 case Bytecodes::_dload_2 : | |
477 case Bytecodes::_dload_3 : | |
478 index = opcode - Bytecodes::_dload_0; | |
479 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
480 no_control_flow = false; break; | |
481 case Bytecodes::_aload : | |
482 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
483 no_control_flow = false; break; | |
484 case Bytecodes::_aload_0 : | |
485 case Bytecodes::_aload_1 : | |
486 case Bytecodes::_aload_2 : | |
487 case Bytecodes::_aload_3 : | |
488 index = opcode - Bytecodes::_aload_0; | |
489 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
490 no_control_flow = false; break; | |
491 case Bytecodes::_iaload : | |
492 type = current_frame.pop_stack( | |
493 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
494 atype = current_frame.pop_stack( | |
495 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
496 if (!atype.is_int_array()) { | |
497 verify_error(bci, bad_type_msg, "iaload"); | |
498 return; | |
499 } | |
500 current_frame.push_stack( | |
501 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
502 no_control_flow = false; break; | |
503 case Bytecodes::_baload : | |
504 type = current_frame.pop_stack( | |
505 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
506 atype = current_frame.pop_stack( | |
507 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
508 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
509 verify_error(bci, bad_type_msg, "baload"); | |
510 return; | |
511 } | |
512 current_frame.push_stack( | |
513 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
514 no_control_flow = false; break; | |
515 case Bytecodes::_caload : | |
516 type = current_frame.pop_stack( | |
517 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
518 atype = current_frame.pop_stack( | |
519 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
520 if (!atype.is_char_array()) { | |
521 verify_error(bci, bad_type_msg, "caload"); | |
522 return; | |
523 } | |
524 current_frame.push_stack( | |
525 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
526 no_control_flow = false; break; | |
527 case Bytecodes::_saload : | |
528 type = current_frame.pop_stack( | |
529 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
530 atype = current_frame.pop_stack( | |
531 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
532 if (!atype.is_short_array()) { | |
533 verify_error(bci, bad_type_msg, "saload"); | |
534 return; | |
535 } | |
536 current_frame.push_stack( | |
537 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
538 no_control_flow = false; break; | |
539 case Bytecodes::_laload : | |
540 type = current_frame.pop_stack( | |
541 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
542 atype = current_frame.pop_stack( | |
543 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
544 if (!atype.is_long_array()) { | |
545 verify_error(bci, bad_type_msg, "laload"); | |
546 return; | |
547 } | |
548 current_frame.push_stack_2( | |
549 VerificationType::long_type(), | |
550 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
551 no_control_flow = false; break; | |
552 case Bytecodes::_faload : | |
553 type = current_frame.pop_stack( | |
554 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
555 atype = current_frame.pop_stack( | |
556 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
557 if (!atype.is_float_array()) { | |
558 verify_error(bci, bad_type_msg, "faload"); | |
559 return; | |
560 } | |
561 current_frame.push_stack( | |
562 VerificationType::float_type(), CHECK_VERIFY(this)); | |
563 no_control_flow = false; break; | |
564 case Bytecodes::_daload : | |
565 type = current_frame.pop_stack( | |
566 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
567 atype = current_frame.pop_stack( | |
568 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
569 if (!atype.is_double_array()) { | |
570 verify_error(bci, bad_type_msg, "daload"); | |
571 return; | |
572 } | |
573 current_frame.push_stack_2( | |
574 VerificationType::double_type(), | |
575 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
576 no_control_flow = false; break; | |
577 case Bytecodes::_aaload : { | |
578 type = current_frame.pop_stack( | |
579 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
580 atype = current_frame.pop_stack( | |
581 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
582 if (!atype.is_reference_array()) { | |
583 verify_error(bci, bad_type_msg, "aaload"); | |
584 return; | |
585 } | |
586 if (atype.is_null()) { | |
587 current_frame.push_stack( | |
588 VerificationType::null_type(), CHECK_VERIFY(this)); | |
589 } else { | |
590 VerificationType component = | |
591 atype.get_component(CHECK_VERIFY(this)); | |
592 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
593 } | |
594 no_control_flow = false; break; | |
595 } | |
596 case Bytecodes::_istore : | |
597 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
598 no_control_flow = false; break; | |
599 case Bytecodes::_istore_0 : | |
600 case Bytecodes::_istore_1 : | |
601 case Bytecodes::_istore_2 : | |
602 case Bytecodes::_istore_3 : | |
603 index = opcode - Bytecodes::_istore_0; | |
604 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
605 no_control_flow = false; break; | |
606 case Bytecodes::_lstore : | |
607 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
608 no_control_flow = false; break; | |
609 case Bytecodes::_lstore_0 : | |
610 case Bytecodes::_lstore_1 : | |
611 case Bytecodes::_lstore_2 : | |
612 case Bytecodes::_lstore_3 : | |
613 index = opcode - Bytecodes::_lstore_0; | |
614 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
615 no_control_flow = false; break; | |
616 case Bytecodes::_fstore : | |
617 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
618 no_control_flow = false; break; | |
619 case Bytecodes::_fstore_0 : | |
620 case Bytecodes::_fstore_1 : | |
621 case Bytecodes::_fstore_2 : | |
622 case Bytecodes::_fstore_3 : | |
623 index = opcode - Bytecodes::_fstore_0; | |
624 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
625 no_control_flow = false; break; | |
626 case Bytecodes::_dstore : | |
627 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
628 no_control_flow = false; break; | |
629 case Bytecodes::_dstore_0 : | |
630 case Bytecodes::_dstore_1 : | |
631 case Bytecodes::_dstore_2 : | |
632 case Bytecodes::_dstore_3 : | |
633 index = opcode - Bytecodes::_dstore_0; | |
634 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
635 no_control_flow = false; break; | |
636 case Bytecodes::_astore : | |
637 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
638 no_control_flow = false; break; | |
639 case Bytecodes::_astore_0 : | |
640 case Bytecodes::_astore_1 : | |
641 case Bytecodes::_astore_2 : | |
642 case Bytecodes::_astore_3 : | |
643 index = opcode - Bytecodes::_astore_0; | |
644 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
645 no_control_flow = false; break; | |
646 case Bytecodes::_iastore : | |
647 type = current_frame.pop_stack( | |
648 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
649 type2 = current_frame.pop_stack( | |
650 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
651 atype = current_frame.pop_stack( | |
652 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
653 if (!atype.is_int_array()) { | |
654 verify_error(bci, bad_type_msg, "iastore"); | |
655 return; | |
656 } | |
657 no_control_flow = false; break; | |
658 case Bytecodes::_bastore : | |
659 type = current_frame.pop_stack( | |
660 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
661 type2 = current_frame.pop_stack( | |
662 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
663 atype = current_frame.pop_stack( | |
664 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
665 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
666 verify_error(bci, bad_type_msg, "bastore"); | |
667 return; | |
668 } | |
669 no_control_flow = false; break; | |
670 case Bytecodes::_castore : | |
671 current_frame.pop_stack( | |
672 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
673 current_frame.pop_stack( | |
674 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
675 atype = current_frame.pop_stack( | |
676 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
677 if (!atype.is_char_array()) { | |
678 verify_error(bci, bad_type_msg, "castore"); | |
679 return; | |
680 } | |
681 no_control_flow = false; break; | |
682 case Bytecodes::_sastore : | |
683 current_frame.pop_stack( | |
684 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
685 current_frame.pop_stack( | |
686 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
687 atype = current_frame.pop_stack( | |
688 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
689 if (!atype.is_short_array()) { | |
690 verify_error(bci, bad_type_msg, "sastore"); | |
691 return; | |
692 } | |
693 no_control_flow = false; break; | |
694 case Bytecodes::_lastore : | |
695 current_frame.pop_stack_2( | |
696 VerificationType::long2_type(), | |
697 VerificationType::long_type(), CHECK_VERIFY(this)); | |
698 current_frame.pop_stack( | |
699 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
700 atype = current_frame.pop_stack( | |
701 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
702 if (!atype.is_long_array()) { | |
703 verify_error(bci, bad_type_msg, "lastore"); | |
704 return; | |
705 } | |
706 no_control_flow = false; break; | |
707 case Bytecodes::_fastore : | |
708 current_frame.pop_stack( | |
709 VerificationType::float_type(), CHECK_VERIFY(this)); | |
710 current_frame.pop_stack | |
711 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
712 atype = current_frame.pop_stack( | |
713 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
714 if (!atype.is_float_array()) { | |
715 verify_error(bci, bad_type_msg, "fastore"); | |
716 return; | |
717 } | |
718 no_control_flow = false; break; | |
719 case Bytecodes::_dastore : | |
720 current_frame.pop_stack_2( | |
721 VerificationType::double2_type(), | |
722 VerificationType::double_type(), CHECK_VERIFY(this)); | |
723 current_frame.pop_stack( | |
724 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
725 atype = current_frame.pop_stack( | |
726 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
727 if (!atype.is_double_array()) { | |
728 verify_error(bci, bad_type_msg, "dastore"); | |
729 return; | |
730 } | |
731 no_control_flow = false; break; | |
732 case Bytecodes::_aastore : | |
1955
1070423b51f3
6865028: Illegal instructions passing verification prior to 'invokespecial Object.<init>'
kamg
parents:
1678
diff
changeset
|
733 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 734 type2 = current_frame.pop_stack( |
735 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
736 atype = current_frame.pop_stack( | |
737 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
738 // more type-checking is done at runtime | |
739 if (!atype.is_reference_array()) { | |
740 verify_error(bci, bad_type_msg, "aastore"); | |
741 return; | |
742 } | |
743 // 4938384: relaxed constraint in JVMS 3nd edition. | |
744 no_control_flow = false; break; | |
745 case Bytecodes::_pop : | |
746 current_frame.pop_stack( | |
747 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
748 no_control_flow = false; break; | |
749 case Bytecodes::_pop2 : | |
750 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
751 if (type.is_category1()) { | |
752 current_frame.pop_stack( | |
753 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
754 } else if (type.is_category2_2nd()) { | |
755 current_frame.pop_stack( | |
756 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
757 } else { | |
758 verify_error(bci, bad_type_msg, "pop2"); | |
759 return; | |
760 } | |
761 no_control_flow = false; break; | |
762 case Bytecodes::_dup : | |
763 type = current_frame.pop_stack( | |
764 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
765 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
766 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
767 no_control_flow = false; break; | |
768 case Bytecodes::_dup_x1 : | |
769 type = current_frame.pop_stack( | |
770 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
771 type2 = current_frame.pop_stack( | |
772 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
773 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
774 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
775 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
776 no_control_flow = false; break; | |
777 case Bytecodes::_dup_x2 : | |
778 { | |
779 VerificationType type3; | |
780 type = current_frame.pop_stack( | |
781 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
782 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
783 if (type2.is_category1()) { | |
784 type3 = current_frame.pop_stack( | |
785 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
786 } else if (type2.is_category2_2nd()) { | |
787 type3 = current_frame.pop_stack( | |
788 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
789 } else { | |
790 verify_error(bci, bad_type_msg, "dup_x2"); | |
791 return; | |
792 } | |
793 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
794 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
795 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
796 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
797 no_control_flow = false; break; | |
798 } | |
799 case Bytecodes::_dup2 : | |
800 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
801 if (type.is_category1()) { | |
802 type2 = current_frame.pop_stack( | |
803 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
804 } else if (type.is_category2_2nd()) { | |
805 type2 = current_frame.pop_stack( | |
806 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
807 } else { | |
808 verify_error(bci, bad_type_msg, "dup2"); | |
809 return; | |
810 } | |
811 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
812 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
813 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
814 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
815 no_control_flow = false; break; | |
816 case Bytecodes::_dup2_x1 : | |
817 { | |
818 VerificationType type3; | |
819 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
820 if (type.is_category1()) { | |
821 type2 = current_frame.pop_stack( | |
822 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
823 } else if(type.is_category2_2nd()) { | |
824 type2 = current_frame.pop_stack | |
825 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
826 } else { | |
827 verify_error(bci, bad_type_msg, "dup2_x1"); | |
828 return; | |
829 } | |
830 type3 = current_frame.pop_stack( | |
831 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
832 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
833 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
834 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
835 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
836 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
837 no_control_flow = false; break; | |
838 } | |
839 case Bytecodes::_dup2_x2 : | |
840 { | |
841 VerificationType type3, type4; | |
842 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
843 if (type.is_category1()) { | |
844 type2 = current_frame.pop_stack( | |
845 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
846 } else if (type.is_category2_2nd()) { | |
847 type2 = current_frame.pop_stack( | |
848 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
849 } else { | |
850 verify_error(bci, bad_type_msg, "dup2_x2"); | |
851 return; | |
852 } | |
853 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
854 if (type3.is_category1()) { | |
855 type4 = current_frame.pop_stack( | |
856 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
857 } else if (type3.is_category2_2nd()) { | |
858 type4 = current_frame.pop_stack( | |
859 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
860 } else { | |
861 verify_error(bci, bad_type_msg, "dup2_x2"); | |
862 return; | |
863 } | |
864 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
865 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
866 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
867 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
868 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
869 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
870 no_control_flow = false; break; | |
871 } | |
872 case Bytecodes::_swap : | |
873 type = current_frame.pop_stack( | |
874 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
875 type2 = current_frame.pop_stack( | |
876 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
877 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
878 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
879 no_control_flow = false; break; | |
880 case Bytecodes::_iadd : | |
881 case Bytecodes::_isub : | |
882 case Bytecodes::_imul : | |
883 case Bytecodes::_idiv : | |
884 case Bytecodes::_irem : | |
885 case Bytecodes::_ishl : | |
886 case Bytecodes::_ishr : | |
887 case Bytecodes::_iushr : | |
888 case Bytecodes::_ior : | |
889 case Bytecodes::_ixor : | |
890 case Bytecodes::_iand : | |
891 current_frame.pop_stack( | |
892 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
893 // fall through | |
894 case Bytecodes::_ineg : | |
895 current_frame.pop_stack( | |
896 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
897 current_frame.push_stack( | |
898 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
899 no_control_flow = false; break; | |
900 case Bytecodes::_ladd : | |
901 case Bytecodes::_lsub : | |
902 case Bytecodes::_lmul : | |
903 case Bytecodes::_ldiv : | |
904 case Bytecodes::_lrem : | |
905 case Bytecodes::_land : | |
906 case Bytecodes::_lor : | |
907 case Bytecodes::_lxor : | |
908 current_frame.pop_stack_2( | |
909 VerificationType::long2_type(), | |
910 VerificationType::long_type(), CHECK_VERIFY(this)); | |
911 // fall through | |
912 case Bytecodes::_lneg : | |
913 current_frame.pop_stack_2( | |
914 VerificationType::long2_type(), | |
915 VerificationType::long_type(), CHECK_VERIFY(this)); | |
916 current_frame.push_stack_2( | |
917 VerificationType::long_type(), | |
918 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
919 no_control_flow = false; break; | |
920 case Bytecodes::_lshl : | |
921 case Bytecodes::_lshr : | |
922 case Bytecodes::_lushr : | |
923 current_frame.pop_stack( | |
924 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
925 current_frame.pop_stack_2( | |
926 VerificationType::long2_type(), | |
927 VerificationType::long_type(), CHECK_VERIFY(this)); | |
928 current_frame.push_stack_2( | |
929 VerificationType::long_type(), | |
930 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
931 no_control_flow = false; break; | |
932 case Bytecodes::_fadd : | |
933 case Bytecodes::_fsub : | |
934 case Bytecodes::_fmul : | |
935 case Bytecodes::_fdiv : | |
936 case Bytecodes::_frem : | |
937 current_frame.pop_stack( | |
938 VerificationType::float_type(), CHECK_VERIFY(this)); | |
939 // fall through | |
940 case Bytecodes::_fneg : | |
941 current_frame.pop_stack( | |
942 VerificationType::float_type(), CHECK_VERIFY(this)); | |
943 current_frame.push_stack( | |
944 VerificationType::float_type(), CHECK_VERIFY(this)); | |
945 no_control_flow = false; break; | |
946 case Bytecodes::_dadd : | |
947 case Bytecodes::_dsub : | |
948 case Bytecodes::_dmul : | |
949 case Bytecodes::_ddiv : | |
950 case Bytecodes::_drem : | |
951 current_frame.pop_stack_2( | |
952 VerificationType::double2_type(), | |
953 VerificationType::double_type(), CHECK_VERIFY(this)); | |
954 // fall through | |
955 case Bytecodes::_dneg : | |
956 current_frame.pop_stack_2( | |
957 VerificationType::double2_type(), | |
958 VerificationType::double_type(), CHECK_VERIFY(this)); | |
959 current_frame.push_stack_2( | |
960 VerificationType::double_type(), | |
961 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
962 no_control_flow = false; break; | |
963 case Bytecodes::_iinc : | |
964 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
965 no_control_flow = false; break; | |
966 case Bytecodes::_i2l : | |
967 type = current_frame.pop_stack( | |
968 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
969 current_frame.push_stack_2( | |
970 VerificationType::long_type(), | |
971 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
972 no_control_flow = false; break; | |
973 case Bytecodes::_l2i : | |
974 current_frame.pop_stack_2( | |
975 VerificationType::long2_type(), | |
976 VerificationType::long_type(), CHECK_VERIFY(this)); | |
977 current_frame.push_stack( | |
978 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
979 no_control_flow = false; break; | |
980 case Bytecodes::_i2f : | |
981 current_frame.pop_stack( | |
982 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
983 current_frame.push_stack( | |
984 VerificationType::float_type(), CHECK_VERIFY(this)); | |
985 no_control_flow = false; break; | |
986 case Bytecodes::_i2d : | |
987 current_frame.pop_stack( | |
988 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
989 current_frame.push_stack_2( | |
990 VerificationType::double_type(), | |
991 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
992 no_control_flow = false; break; | |
993 case Bytecodes::_l2f : | |
994 current_frame.pop_stack_2( | |
995 VerificationType::long2_type(), | |
996 VerificationType::long_type(), CHECK_VERIFY(this)); | |
997 current_frame.push_stack( | |
998 VerificationType::float_type(), CHECK_VERIFY(this)); | |
999 no_control_flow = false; break; | |
1000 case Bytecodes::_l2d : | |
1001 current_frame.pop_stack_2( | |
1002 VerificationType::long2_type(), | |
1003 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1004 current_frame.push_stack_2( | |
1005 VerificationType::double_type(), | |
1006 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1007 no_control_flow = false; break; | |
1008 case Bytecodes::_f2i : | |
1009 current_frame.pop_stack( | |
1010 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1011 current_frame.push_stack( | |
1012 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1013 no_control_flow = false; break; | |
1014 case Bytecodes::_f2l : | |
1015 current_frame.pop_stack( | |
1016 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1017 current_frame.push_stack_2( | |
1018 VerificationType::long_type(), | |
1019 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1020 no_control_flow = false; break; | |
1021 case Bytecodes::_f2d : | |
1022 current_frame.pop_stack( | |
1023 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1024 current_frame.push_stack_2( | |
1025 VerificationType::double_type(), | |
1026 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1027 no_control_flow = false; break; | |
1028 case Bytecodes::_d2i : | |
1029 current_frame.pop_stack_2( | |
1030 VerificationType::double2_type(), | |
1031 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1032 current_frame.push_stack( | |
1033 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1034 no_control_flow = false; break; | |
1035 case Bytecodes::_d2l : | |
1036 current_frame.pop_stack_2( | |
1037 VerificationType::double2_type(), | |
1038 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1039 current_frame.push_stack_2( | |
1040 VerificationType::long_type(), | |
1041 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1042 no_control_flow = false; break; | |
1043 case Bytecodes::_d2f : | |
1044 current_frame.pop_stack_2( | |
1045 VerificationType::double2_type(), | |
1046 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1047 current_frame.push_stack( | |
1048 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1049 no_control_flow = false; break; | |
1050 case Bytecodes::_i2b : | |
1051 case Bytecodes::_i2c : | |
1052 case Bytecodes::_i2s : | |
1053 current_frame.pop_stack( | |
1054 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1055 current_frame.push_stack( | |
1056 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1057 no_control_flow = false; break; | |
1058 case Bytecodes::_lcmp : | |
1059 current_frame.pop_stack_2( | |
1060 VerificationType::long2_type(), | |
1061 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1062 current_frame.pop_stack_2( | |
1063 VerificationType::long2_type(), | |
1064 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1065 current_frame.push_stack( | |
1066 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1067 no_control_flow = false; break; | |
1068 case Bytecodes::_fcmpl : | |
1069 case Bytecodes::_fcmpg : | |
1070 current_frame.pop_stack( | |
1071 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1072 current_frame.pop_stack( | |
1073 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1074 current_frame.push_stack( | |
1075 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1076 no_control_flow = false; break; | |
1077 case Bytecodes::_dcmpl : | |
1078 case Bytecodes::_dcmpg : | |
1079 current_frame.pop_stack_2( | |
1080 VerificationType::double2_type(), | |
1081 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1082 current_frame.pop_stack_2( | |
1083 VerificationType::double2_type(), | |
1084 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1085 current_frame.push_stack( | |
1086 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1087 no_control_flow = false; break; | |
1088 case Bytecodes::_if_icmpeq: | |
1089 case Bytecodes::_if_icmpne: | |
1090 case Bytecodes::_if_icmplt: | |
1091 case Bytecodes::_if_icmpge: | |
1092 case Bytecodes::_if_icmpgt: | |
1093 case Bytecodes::_if_icmple: | |
1094 current_frame.pop_stack( | |
1095 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1096 // fall through | |
1097 case Bytecodes::_ifeq: | |
1098 case Bytecodes::_ifne: | |
1099 case Bytecodes::_iflt: | |
1100 case Bytecodes::_ifge: | |
1101 case Bytecodes::_ifgt: | |
1102 case Bytecodes::_ifle: | |
1103 current_frame.pop_stack( | |
1104 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1105 target = bcs.dest(); | |
1106 stackmap_table.check_jump_target( | |
1107 ¤t_frame, target, CHECK_VERIFY(this)); | |
1108 no_control_flow = false; break; | |
1109 case Bytecodes::_if_acmpeq : | |
1110 case Bytecodes::_if_acmpne : | |
1111 current_frame.pop_stack( | |
1112 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1113 // fall through | |
1114 case Bytecodes::_ifnull : | |
1115 case Bytecodes::_ifnonnull : | |
1116 current_frame.pop_stack( | |
1117 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1118 target = bcs.dest(); | |
1119 stackmap_table.check_jump_target | |
1120 (¤t_frame, target, CHECK_VERIFY(this)); | |
1121 no_control_flow = false; break; | |
1122 case Bytecodes::_goto : | |
1123 target = bcs.dest(); | |
1124 stackmap_table.check_jump_target( | |
1125 ¤t_frame, target, CHECK_VERIFY(this)); | |
1126 no_control_flow = true; break; | |
1127 case Bytecodes::_goto_w : | |
1128 target = bcs.dest_w(); | |
1129 stackmap_table.check_jump_target( | |
1130 ¤t_frame, target, CHECK_VERIFY(this)); | |
1131 no_control_flow = true; break; | |
1132 case Bytecodes::_tableswitch : | |
1133 case Bytecodes::_lookupswitch : | |
1134 verify_switch( | |
1135 &bcs, code_length, code_data, ¤t_frame, | |
1136 &stackmap_table, CHECK_VERIFY(this)); | |
1137 no_control_flow = true; break; | |
1138 case Bytecodes::_ireturn : | |
1139 type = current_frame.pop_stack( | |
1140 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1141 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1142 no_control_flow = true; break; | |
1143 case Bytecodes::_lreturn : | |
1144 type2 = current_frame.pop_stack( | |
1145 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1146 type = current_frame.pop_stack( | |
1147 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1148 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1149 no_control_flow = true; break; | |
1150 case Bytecodes::_freturn : | |
1151 type = current_frame.pop_stack( | |
1152 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1153 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1154 no_control_flow = true; break; | |
1155 case Bytecodes::_dreturn : | |
1156 type2 = current_frame.pop_stack( | |
1157 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1158 type = current_frame.pop_stack( | |
1159 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1160 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1161 no_control_flow = true; break; | |
1162 case Bytecodes::_areturn : | |
1163 type = current_frame.pop_stack( | |
1164 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1165 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1166 no_control_flow = true; break; | |
1167 case Bytecodes::_return : | |
1168 if (return_type != VerificationType::bogus_type()) { | |
1169 verify_error(bci, "Method expects no return value"); | |
1170 return; | |
1171 } | |
1172 // Make sure "this" has been initialized if current method is an | |
1173 // <init> | |
1174 if (_method->name() == vmSymbols::object_initializer_name() && | |
1175 current_frame.flag_this_uninit()) { | |
1176 verify_error(bci, | |
1177 "Constructor must call super() or this() before return"); | |
1178 return; | |
1179 } | |
1180 no_control_flow = true; break; | |
1181 case Bytecodes::_getstatic : | |
1182 case Bytecodes::_putstatic : | |
1183 case Bytecodes::_getfield : | |
1184 case Bytecodes::_putfield : | |
1185 verify_field_instructions( | |
1186 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1187 no_control_flow = false; break; | |
1188 case Bytecodes::_invokevirtual : | |
1189 case Bytecodes::_invokespecial : | |
1190 case Bytecodes::_invokestatic : | |
1191 verify_invoke_instructions( | |
1192 &bcs, code_length, ¤t_frame, | |
1193 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1194 no_control_flow = false; break; | |
1195 case Bytecodes::_invokeinterface : | |
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1196 case Bytecodes::_invokedynamic : |
0 | 1197 verify_invoke_instructions( |
1198 &bcs, code_length, ¤t_frame, | |
1199 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1200 no_control_flow = false; break; | |
1201 case Bytecodes::_new : | |
1202 { | |
1565 | 1203 index = bcs.get_index_u2(); |
0 | 1204 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1205 VerificationType new_class_type = | |
1206 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1207 if (!new_class_type.is_object()) { | |
1208 verify_error(bci, "Illegal new instruction"); | |
1209 return; | |
1210 } | |
1211 type = VerificationType::uninitialized_type(bci); | |
1212 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1213 no_control_flow = false; break; | |
1214 } | |
1215 case Bytecodes::_newarray : | |
1216 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1217 current_frame.pop_stack( | |
1218 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1219 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1220 no_control_flow = false; break; | |
1221 case Bytecodes::_anewarray : | |
1222 verify_anewarray( | |
1565 | 1223 bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1224 no_control_flow = false; break; |
1225 case Bytecodes::_arraylength : | |
1226 type = current_frame.pop_stack( | |
1227 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1228 if (!(type.is_null() || type.is_array())) { |
0 | 1229 verify_error(bci, bad_type_msg, "arraylength"); |
1230 } | |
1231 current_frame.push_stack( | |
1232 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1233 no_control_flow = false; break; | |
1234 case Bytecodes::_checkcast : | |
1235 { | |
1565 | 1236 index = bcs.get_index_u2(); |
0 | 1237 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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1238 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1239 VerificationType klass_type = cp_index_to_type( |
1240 index, cp, CHECK_VERIFY(this)); | |
1241 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1242 no_control_flow = false; break; | |
1243 } | |
1244 case Bytecodes::_instanceof : { | |
1565 | 1245 index = bcs.get_index_u2(); |
0 | 1246 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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1247 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1248 current_frame.push_stack( |
1249 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1250 no_control_flow = false; break; | |
1251 } | |
1252 case Bytecodes::_monitorenter : | |
1253 case Bytecodes::_monitorexit : | |
1254 current_frame.pop_stack( | |
1255 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1256 no_control_flow = false; break; | |
1257 case Bytecodes::_multianewarray : | |
1258 { | |
1565 | 1259 index = bcs.get_index_u2(); |
0 | 1260 u2 dim = *(bcs.bcp()+3); |
1261 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1262 VerificationType new_array_type = | |
1263 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1264 if (!new_array_type.is_array()) { | |
1265 verify_error(bci, | |
1266 "Illegal constant pool index in multianewarray instruction"); | |
1267 return; | |
1268 } | |
1269 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1270 verify_error(bci, | |
1271 "Illegal dimension in multianewarray instruction"); | |
1272 return; | |
1273 } | |
1274 for (int i = 0; i < dim; i++) { | |
1275 current_frame.pop_stack( | |
1276 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1277 } | |
1278 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1279 no_control_flow = false; break; | |
1280 } | |
1281 case Bytecodes::_athrow : | |
1282 type = VerificationType::reference_type( | |
1283 vmSymbols::java_lang_Throwable()); | |
1284 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1285 no_control_flow = true; break; | |
1286 default: | |
1287 // We only need to check the valid bytecodes in class file. | |
1288 // And jsr and ret are not in the new class file format in JDK1.5. | |
1289 verify_error(bci, "Bad instruction"); | |
1290 no_control_flow = false; | |
1291 return; | |
1292 } // end switch | |
1293 } // end Merge with the next instruction | |
1294 | |
1295 // Look for possible jump target in exception handlers and see if it | |
1296 // matches current_frame | |
1297 if (bci >= ex_min && bci < ex_max) { | |
1298 verify_exception_handler_targets( | |
1299 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1300 } | |
1301 } // end while | |
1302 | |
1303 // Make sure that control flow does not fall through end of the method | |
1304 if (!no_control_flow) { | |
1305 verify_error(code_length, "Control flow falls through code end"); | |
1306 return; | |
1307 } | |
1308 } | |
1309 | |
1310 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1311 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1312 memset(code_data, 0, sizeof(char) * code_length); | |
1313 RawBytecodeStream bcs(m); | |
1314 | |
1315 while (!bcs.is_last_bytecode()) { | |
1316 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1317 int bci = bcs.bci(); | |
1565 | 1318 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1319 code_data[bci] = NEW_OFFSET; |
1320 } else { | |
1321 code_data[bci] = BYTECODE_OFFSET; | |
1322 } | |
1323 } else { | |
1324 verify_error(bcs.bci(), "Bad instruction"); | |
1325 return NULL; | |
1326 } | |
1327 } | |
1328 | |
1329 return code_data; | |
1330 } | |
1331 | |
1332 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1333 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1334 constantPoolHandle cp (THREAD, _method->constants()); | |
1335 | |
1336 if (exhandlers() != NULL) { | |
1337 for(int i = 0; i < exhandlers->length();) { | |
1338 u2 start_pc = exhandlers->int_at(i++); | |
1339 u2 end_pc = exhandlers->int_at(i++); | |
1340 u2 handler_pc = exhandlers->int_at(i++); | |
1341 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1342 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1343 return; | |
1344 } | |
1345 if (end_pc != code_length) { // special case: end_pc == code_length | |
1346 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1347 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1348 return; | |
1349 } | |
1350 } | |
1351 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1352 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1353 return; | |
1354 } | |
1355 int catch_type_index = exhandlers->int_at(i++); | |
1356 if (catch_type_index != 0) { | |
1357 VerificationType catch_type = cp_index_to_type( | |
1358 catch_type_index, cp, CHECK_VERIFY(this)); | |
1359 VerificationType throwable = | |
1360 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1361 bool is_subclass = throwable.is_assignable_from( | |
1362 catch_type, current_class(), CHECK_VERIFY(this)); | |
1363 if (!is_subclass) { | |
1364 // 4286534: should throw VerifyError according to recent spec change | |
1365 verify_error( | |
1366 "Catch type is not a subclass of Throwable in handler %d", | |
1367 handler_pc); | |
1368 return; | |
1369 } | |
1370 } | |
1371 if (start_pc < min) min = start_pc; | |
1372 if (end_pc > max) max = end_pc; | |
1373 } | |
1374 } | |
1375 } | |
1376 | |
1377 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1378 int localvariable_table_length = _method()->localvariable_table_length(); | |
1379 if (localvariable_table_length > 0) { | |
1380 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1381 for (int i = 0; i < localvariable_table_length; i++) { | |
1382 u2 start_bci = table[i].start_bci; | |
1383 u2 length = table[i].length; | |
1384 | |
1385 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1386 class_format_error( | |
1387 "Illegal local variable table start_pc %d", start_bci); | |
1388 return; | |
1389 } | |
1390 u4 end_bci = (u4)(start_bci + length); | |
1391 if (end_bci != code_length) { | |
1392 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1393 class_format_error( "Illegal local variable table length %d", length); | |
1394 return; | |
1395 } | |
1396 } | |
1397 } | |
1398 } | |
1399 } | |
1400 | |
1401 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1402 StackMapFrame* current_frame, | |
1403 StackMapTable* stackmap_table, | |
1404 bool no_control_flow, TRAPS) { | |
1405 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1406 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1407 if (no_control_flow && this_offset > bci) { | |
1408 verify_error(bci, "Expecting a stack map frame"); | |
1409 return 0; | |
1410 } | |
1411 if (this_offset == bci) { | |
1412 // See if current stack map can be assigned to the frame in table. | |
1413 // current_frame is the stackmap frame got from the last instruction. | |
1414 // If matched, current_frame will be updated by this method. | |
1415 bool match = stackmap_table->match_stackmap( | |
1416 current_frame, this_offset, stackmap_index, | |
1417 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1418 if (!match) { | |
1419 // report type error | |
1420 verify_error(bci, "Instruction type does not match stack map"); | |
1421 return 0; | |
1422 } | |
1423 stackmap_index++; | |
1424 } else if (this_offset < bci) { | |
1425 // current_offset should have met this_offset. | |
1426 class_format_error("Bad stack map offset %d", this_offset); | |
1427 return 0; | |
1428 } | |
1429 } else if (no_control_flow) { | |
1430 verify_error(bci, "Expecting a stack map frame"); | |
1431 return 0; | |
1432 } | |
1433 return stackmap_index; | |
1434 } | |
1435 | |
1436 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1437 StackMapTable* stackmap_table, TRAPS) { | |
1438 constantPoolHandle cp (THREAD, _method->constants()); | |
1439 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1440 if (exhandlers() != NULL) { | |
1441 for(int i = 0; i < exhandlers->length();) { | |
1442 u2 start_pc = exhandlers->int_at(i++); | |
1443 u2 end_pc = exhandlers->int_at(i++); | |
1444 u2 handler_pc = exhandlers->int_at(i++); | |
1445 int catch_type_index = exhandlers->int_at(i++); | |
1446 if(bci >= start_pc && bci < end_pc) { | |
1447 u1 flags = current_frame->flags(); | |
1448 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1449 | |
1450 ResourceMark rm(THREAD); | |
1451 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1452 if (catch_type_index != 0) { | |
1453 // We know that this index refers to a subclass of Throwable | |
1454 VerificationType catch_type = cp_index_to_type( | |
1455 catch_type_index, cp, CHECK_VERIFY(this)); | |
1456 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1457 } else { | |
1458 VerificationType throwable = | |
1459 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1460 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1461 } | |
1462 bool match = stackmap_table->match_stackmap( | |
1463 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1464 if (!match) { | |
1465 verify_error(bci, | |
1466 "Stack map does not match the one at exception handler %d", | |
1467 handler_pc); | |
1468 return; | |
1469 } | |
1470 } | |
1471 } | |
1472 } | |
1473 } | |
1474 | |
1475 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1476 int nconstants = cp->length(); | |
1477 if ((index <= 0) || (index >= nconstants)) { | |
1478 verify_error("Illegal constant pool index %d in class %s", | |
1479 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1480 return; | |
1481 } | |
1482 } | |
1483 | |
1484 void ClassVerifier::verify_cp_type( | |
1485 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1486 | |
1487 // In some situations, bytecode rewriting may occur while we're verifying. | |
1488 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1489 // instead. Be sure we don't pick up such indices by accident. |
1490 // We must check was_recursively_verified() before we get here. | |
1491 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1492 |
1493 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1494 unsigned int tag = cp->tag_at(index).value(); | |
1495 if ((types & (1 << tag)) == 0) { | |
1496 verify_error( | |
1497 "Illegal type at constant pool entry %d in class %s", | |
1498 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1499 return; | |
1500 } | |
1501 } | |
1502 | |
1503 void ClassVerifier::verify_cp_class_type( | |
1504 int index, constantPoolHandle cp, TRAPS) { | |
1505 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1506 constantTag tag = cp->tag_at(index); | |
1507 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1508 verify_error("Illegal type at constant pool entry %d in class %s", | |
1509 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1510 return; | |
1511 } | |
1512 } | |
1513 | |
1514 void ClassVerifier::format_error_message( | |
1515 const char* fmt, int offset, va_list va) { | |
1516 ResourceMark rm(_thread); | |
1517 stringStream message(_message, _message_buffer_len); | |
1518 message.vprint(fmt, va); | |
1519 if (!_method.is_null()) { | |
1520 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1521 } | |
1522 if (offset != -1) { | |
1523 message.print(" at offset %d", offset); | |
1524 } | |
1525 } | |
1526 | |
1527 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1528 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1529 va_list va; | |
1530 va_start(va, fmt); | |
1531 format_error_message(fmt, offset, va); | |
1532 va_end(va); | |
1533 } | |
1534 | |
1535 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1536 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1537 va_list va; | |
1538 va_start(va, fmt); | |
1539 format_error_message(fmt, -1, va); | |
1540 va_end(va); | |
1541 } | |
1542 | |
1543 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1544 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1545 va_list va; | |
1546 va_start(va, msg); | |
1547 format_error_message(msg, -1, va); | |
1548 va_end(va); | |
1549 } | |
1550 | |
1551 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
1552 // Get current loader and protection domain first. | |
1553 oop loader = current_class()->class_loader(); | |
1554 oop protection_domain = current_class()->protection_domain(); | |
1555 | |
1556 return SystemDictionary::resolve_or_fail( | |
1557 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1558 true, CHECK_NULL); | |
1559 } | |
1560 | |
1561 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1562 klassOop target_class, | |
1563 symbolOop field_name, | |
1564 symbolOop field_sig, | |
1565 bool is_method) { | |
1566 No_Safepoint_Verifier nosafepoint; | |
1567 | |
1568 // If target class isn't a super class of this class, we don't worry about this case | |
1569 if (!this_class->is_subclass_of(target_class)) { | |
1570 return false; | |
1571 } | |
1572 // Check if the specified method or field is protected | |
1573 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1574 fieldDescriptor fd; | |
1575 if (is_method) { | |
1576 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1577 if (m != NULL && m->is_protected()) { | |
1578 if (!this_class->is_same_class_package(m->method_holder())) { | |
1579 return true; | |
1580 } | |
1581 } | |
1582 } else { | |
1583 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1584 if(member_klass != NULL && fd.is_protected()) { | |
1585 if (!this_class->is_same_class_package(member_klass)) { | |
1586 return true; | |
1587 } | |
1588 } | |
1589 } | |
1590 return false; | |
1591 } | |
1592 | |
1593 void ClassVerifier::verify_ldc( | |
1594 int opcode, u2 index, StackMapFrame *current_frame, | |
1595 constantPoolHandle cp, u2 bci, TRAPS) { | |
1596 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1597 constantTag tag = cp->tag_at(index); | |
1598 unsigned int types; | |
1599 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1600 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1601 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1602 | 1602 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1603 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1604 // Note: The class file parser already verified the legality of | |
1605 // MethodHandle and MethodType constants. | |
0 | 1606 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
1607 } | |
1608 } else { | |
1609 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1610 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1611 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1612 } | |
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1613 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1614 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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|
1615 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1616 current_frame->push_stack( |
1617 VerificationType::reference_type( | |
1618 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1619 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1620 current_frame->push_stack( | |
1621 VerificationType::reference_type( | |
1622 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1623 } else if (tag.is_int()) { | |
1624 current_frame->push_stack( | |
1625 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1626 } else if (tag.is_float()) { | |
1627 current_frame->push_stack( | |
1628 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1629 } else if (tag.is_double()) { | |
1630 current_frame->push_stack_2( | |
1631 VerificationType::double_type(), | |
1632 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1633 } else if (tag.is_long()) { | |
1634 current_frame->push_stack_2( | |
1635 VerificationType::long_type(), | |
1636 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 1637 } else if (tag.is_method_handle()) { |
1638 current_frame->push_stack( | |
1639 VerificationType::reference_type( | |
1640 vmSymbols::java_dyn_MethodHandle()), CHECK_VERIFY(this)); | |
1641 } else if (tag.is_method_type()) { | |
1642 current_frame->push_stack( | |
1643 VerificationType::reference_type( | |
1644 vmSymbols::java_dyn_MethodType()), CHECK_VERIFY(this)); | |
0 | 1645 } else { |
1646 verify_error(bci, "Invalid index in ldc"); | |
1647 return; | |
1648 } | |
1649 } | |
1650 | |
1651 void ClassVerifier::verify_switch( | |
1652 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1653 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1654 int bci = bcs->bci(); | |
1655 address bcp = bcs->bcp(); | |
1656 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1657 | |
1658 // 4639449 & 4647081: padding bytes must be 0 | |
1659 u2 padding_offset = 1; | |
1660 while ((bcp + padding_offset) < aligned_bcp) { | |
1661 if(*(bcp + padding_offset) != 0) { | |
1662 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1663 return; | |
1664 } | |
1665 padding_offset++; | |
1666 } | |
1667 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1668 int keys, delta; | |
1669 current_frame->pop_stack( | |
1670 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 1671 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 1672 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
1673 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1674 if (low > high) { | |
1675 verify_error(bci, | |
1676 "low must be less than or equal to high in tableswitch"); | |
1677 return; | |
1678 } | |
1679 keys = high - low + 1; | |
1680 if (keys < 0) { | |
1681 verify_error(bci, "too many keys in tableswitch"); | |
1682 return; | |
1683 } | |
1684 delta = 1; | |
1685 } else { | |
1686 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1687 if (keys < 0) { | |
1688 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1689 return; | |
1690 } | |
1691 delta = 2; | |
1692 // Make sure that the lookupswitch items are sorted | |
1693 for (int i = 0; i < (keys - 1); i++) { | |
1694 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1695 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1696 if (this_key >= next_key) { | |
1697 verify_error(bci, "Bad lookupswitch instruction"); | |
1698 return; | |
1699 } | |
1700 } | |
1701 } | |
1702 int target = bci + default_offset; | |
1703 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1704 for (int i = 0; i < keys; i++) { | |
1705 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1706 stackmap_table->check_jump_target( | |
1707 current_frame, target, CHECK_VERIFY(this)); | |
1708 } | |
1709 } | |
1710 | |
1711 bool ClassVerifier::name_in_supers( | |
1712 symbolOop ref_name, instanceKlassHandle current) { | |
1713 klassOop super = current->super(); | |
1714 while (super != NULL) { | |
1715 if (super->klass_part()->name() == ref_name) { | |
1716 return true; | |
1717 } | |
1718 super = super->klass_part()->super(); | |
1719 } | |
1720 return false; | |
1721 } | |
1722 | |
1723 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1724 StackMapFrame* current_frame, | |
1725 constantPoolHandle cp, | |
1726 TRAPS) { | |
1565 | 1727 u2 index = bcs->get_index_u2(); |
0 | 1728 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); |
1729 | |
1730 // Get field name and signature | |
1731 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
1732 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
1733 | |
1734 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1735 class_format_error( | |
1736 "Invalid signature for field in class %s referenced " | |
1737 "from constant pool index %d", _klass->external_name(), index); | |
1738 return; | |
1739 } | |
1740 | |
1741 // Get referenced class type | |
1742 VerificationType ref_class_type = cp_ref_index_to_type( | |
1743 index, cp, CHECK_VERIFY(this)); | |
1744 if (!ref_class_type.is_object()) { | |
1745 verify_error( | |
1746 "Expecting reference to class in class %s at constant pool index %d", | |
1747 _klass->external_name(), index); | |
1748 return; | |
1749 } | |
1750 VerificationType target_class_type = ref_class_type; | |
1751 | |
1752 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1753 "buffer type must match VerificationType size"); | |
1754 uintptr_t field_type_buffer[2]; | |
1755 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1756 // If we make a VerificationType[2] array directly, the compiler calls | |
1757 // to the c-runtime library to do the allocation instead of just | |
1758 // stack allocating it. Plus it would run constructors. This shows up | |
1759 // in performance profiles. | |
1760 | |
1761 SignatureStream sig_stream(field_sig, false); | |
1762 VerificationType stack_object_type; | |
1763 int n = change_sig_to_verificationType( | |
1764 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1765 u2 bci = bcs->bci(); | |
1766 bool is_assignable; | |
1565 | 1767 switch (bcs->raw_code()) { |
0 | 1768 case Bytecodes::_getstatic: { |
1769 for (int i = 0; i < n; i++) { | |
1770 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1771 } | |
1772 break; | |
1773 } | |
1774 case Bytecodes::_putstatic: { | |
1775 for (int i = n - 1; i >= 0; i--) { | |
1776 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1777 } | |
1778 break; | |
1779 } | |
1780 case Bytecodes::_getfield: { | |
1781 stack_object_type = current_frame->pop_stack( | |
1782 target_class_type, CHECK_VERIFY(this)); | |
1783 for (int i = 0; i < n; i++) { | |
1784 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1785 } | |
1786 goto check_protected; | |
1787 } | |
1788 case Bytecodes::_putfield: { | |
1789 for (int i = n - 1; i >= 0; i--) { | |
1790 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1791 } | |
1792 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1793 | |
1794 // The JVMS 2nd edition allows field initialization before the superclass | |
1795 // initializer, if the field is defined within the current class. | |
1796 fieldDescriptor fd; | |
1797 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1798 target_class_type.equals(current_type()) && | |
1799 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
1800 stack_object_type = current_type(); | |
1801 } | |
1802 is_assignable = target_class_type.is_assignable_from( | |
1803 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1804 if (!is_assignable) { | |
1805 verify_error(bci, "Bad type on operand stack in putfield"); | |
1806 return; | |
1807 } | |
1808 } | |
1809 check_protected: { | |
1810 if (_this_type == stack_object_type) | |
1811 break; // stack_object_type must be assignable to _current_class_type | |
1812 symbolHandle ref_class_name = symbolHandle(THREAD, | |
1813 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
1814 if (!name_in_supers(ref_class_name(), current_class())) | |
1815 // stack_object_type must be assignable to _current_class_type since: | |
1816 // 1. stack_object_type must be assignable to ref_class. | |
1817 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1818 // be a superclass of it. See revised JVMS 5.4.4. | |
1819 break; | |
1820 | |
1821 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
1822 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
1823 field_sig(), false)) { | |
1824 // It's protected access, check if stack object is assignable to | |
1825 // current class. | |
1826 is_assignable = current_type().is_assignable_from( | |
1827 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1828 if (!is_assignable) { | |
1829 verify_error(bci, "Bad access to protected data in getfield"); | |
1830 return; | |
1831 } | |
1832 } | |
1833 break; | |
1834 } | |
1835 default: ShouldNotReachHere(); | |
1836 } | |
1837 } | |
1838 | |
1839 void ClassVerifier::verify_invoke_init( | |
1840 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1841 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1842 constantPoolHandle cp, TRAPS) { | |
1843 u2 bci = bcs->bci(); | |
1844 VerificationType type = current_frame->pop_stack( | |
1845 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1846 if (type == VerificationType::uninitialized_this_type()) { | |
1847 // The method must be an <init> method of either this class, or one of its | |
1848 // superclasses | |
1677 | 1849 if (ref_class_type.name() != current_class()->name() && |
1850 !name_in_supers(ref_class_type.name(), current_class())) { | |
0 | 1851 verify_error(bci, "Bad <init> method call"); |
1852 return; | |
1853 } | |
1854 current_frame->initialize_object(type, current_type()); | |
1855 *this_uninit = true; | |
1856 } else if (type.is_uninitialized()) { | |
1857 u2 new_offset = type.bci(); | |
1858 address new_bcp = bcs->bcp() - bci + new_offset; | |
1859 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1860 verify_error(new_offset, "Expecting new instruction"); | |
1861 return; | |
1862 } | |
1863 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1864 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1865 | |
1866 // The method must be an <init> method of the indicated class | |
1867 VerificationType new_class_type = cp_index_to_type( | |
1868 new_class_index, cp, CHECK_VERIFY(this)); | |
1869 if (!new_class_type.equals(ref_class_type)) { | |
1870 verify_error(bci, "Call to wrong <init> method"); | |
1871 return; | |
1872 } | |
1873 // According to the VM spec, if the referent class is a superclass of the | |
1874 // current class, and is in a different runtime package, and the method is | |
1875 // protected, then the objectref must be the current class or a subclass | |
1876 // of the current class. | |
1877 VerificationType objectref_type = new_class_type; | |
1878 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1879 klassOop ref_klass = load_class( | |
1880 ref_class_type.name(), CHECK_VERIFY(this)); | |
1881 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1882 vmSymbols::object_initializer_name(), | |
1565 | 1883 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 1884 instanceKlassHandle mh(THREAD, m->method_holder()); |
1885 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1886 bool assignable = current_type().is_assignable_from( | |
1887 objectref_type, current_class(), CHECK_VERIFY(this)); | |
1888 if (!assignable) { | |
1889 verify_error(bci, "Bad access to protected <init> method"); | |
1890 return; | |
1891 } | |
1892 } | |
1893 } | |
1894 current_frame->initialize_object(type, new_class_type); | |
1895 } else { | |
1896 verify_error(bci, "Bad operand type when invoking <init>"); | |
1897 return; | |
1898 } | |
1899 } | |
1900 | |
1901 void ClassVerifier::verify_invoke_instructions( | |
1902 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1903 bool *this_uninit, VerificationType return_type, | |
1904 constantPoolHandle cp, TRAPS) { | |
1905 // Make sure the constant pool item is the right type | |
1565 | 1906 u2 index = bcs->get_index_u2(); |
1907 Bytecodes::Code opcode = bcs->raw_code(); | |
0 | 1908 unsigned int types = (opcode == Bytecodes::_invokeinterface |
1909 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1910 : opcode == Bytecodes::_invokedynamic |
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1911 ? (1 << JVM_CONSTANT_NameAndType |
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1912 |1 << JVM_CONSTANT_InvokeDynamic) |
0 | 1913 : 1 << JVM_CONSTANT_Methodref); |
1914 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1915 | |
1916 // Get method name and signature | |
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1917 symbolHandle method_name(THREAD, cp->name_ref_at(index)); |
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1918 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); |
0 | 1919 |
1920 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1921 class_format_error( | |
1922 "Invalid method signature in class %s referenced " | |
1923 "from constant pool index %d", _klass->external_name(), index); | |
1924 return; | |
1925 } | |
1926 | |
1927 // Get referenced class type | |
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1928 VerificationType ref_class_type; |
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1929 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 1930 if (!EnableInvokeDynamic || |
1931 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
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1932 class_format_error( |
1602 | 1933 (!EnableInvokeDynamic ? |
1934 "invokedynamic instructions not enabled in this JVM" : | |
1935 "invokedynamic instructions not supported by this class file version"), | |
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1936 _klass->external_name()); |
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1937 return; |
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1938 } |
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1939 } else { |
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1940 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1941 } |
0 | 1942 |
1943 // For a small signature length, we just allocate 128 bytes instead | |
1944 // of parsing the signature once to find its size. | |
1945 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1946 // longs/doubles to be consertive. | |
1947 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1948 "buffer type must match VerificationType size"); | |
1949 uintptr_t on_stack_sig_types_buffer[128]; | |
1950 // If we make a VerificationType[128] array directly, the compiler calls | |
1951 // to the c-runtime library to do the allocation instead of just | |
1952 // stack allocating it. Plus it would run constructors. This shows up | |
1953 // in performance profiles. | |
1954 | |
1955 VerificationType* sig_types; | |
1956 int size = (method_sig->utf8_length() - 3) * 2; | |
1957 if (size > 128) { | |
1958 // Long and double occupies two slots here. | |
1959 ArgumentSizeComputer size_it(method_sig); | |
1960 size = size_it.size(); | |
1961 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1962 } else{ | |
1963 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1964 } | |
1965 SignatureStream sig_stream(method_sig); | |
1966 int sig_i = 0; | |
1967 while (!sig_stream.at_return_type()) { | |
1968 sig_i += change_sig_to_verificationType( | |
1969 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
1970 sig_stream.next(); | |
1971 } | |
1972 int nargs = sig_i; | |
1973 | |
1974 #ifdef ASSERT | |
1975 { | |
1976 ArgumentSizeComputer size_it(method_sig); | |
1977 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
1978 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
1979 } | |
1980 #endif | |
1981 | |
1982 // Check instruction operands | |
1983 u2 bci = bcs->bci(); | |
1984 if (opcode == Bytecodes::_invokeinterface) { | |
1985 address bcp = bcs->bcp(); | |
1986 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
1987 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
1988 // the difference between the size of the operand stack before and after the instruction | |
1989 // executes. | |
1990 if (*(bcp+3) != (nargs+1)) { | |
1991 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
1992 return; | |
1993 } | |
1994 if (*(bcp+4) != 0) { | |
1995 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
1996 return; | |
1997 } | |
1998 } | |
1999 | |
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2000 if (opcode == Bytecodes::_invokedynamic) { |
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2001 address bcp = bcs->bcp(); |
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2002 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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2003 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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2004 return; |
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2005 } |
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2006 } |
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2007 |
0 | 2008 if (method_name->byte_at(0) == '<') { |
2009 // Make sure <init> can only be invoked by invokespecial | |
2010 if (opcode != Bytecodes::_invokespecial || | |
2011 method_name() != vmSymbols::object_initializer_name()) { | |
2012 verify_error(bci, "Illegal call to internal method"); | |
2013 return; | |
2014 } | |
2015 } else if (opcode == Bytecodes::_invokespecial | |
2016 && !ref_class_type.equals(current_type()) | |
2017 && !ref_class_type.equals(VerificationType::reference_type( | |
2018 current_class()->super()->klass_part()->name()))) { | |
2019 bool subtype = ref_class_type.is_assignable_from( | |
2020 current_type(), current_class(), CHECK_VERIFY(this)); | |
2021 if (!subtype) { | |
2022 verify_error(bci, "Bad invokespecial instruction: " | |
2023 "current class isn't assignable to reference class."); | |
2024 return; | |
2025 } | |
2026 } | |
2027 // Match method descriptor with operand stack | |
2028 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2029 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2030 } | |
2031 // Check objectref on operand stack | |
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2032 if (opcode != Bytecodes::_invokestatic && |
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2033 opcode != Bytecodes::_invokedynamic) { |
0 | 2034 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
2035 verify_invoke_init(bcs, ref_class_type, current_frame, | |
2036 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2037 } else { // other methods | |
2038 // Ensures that target class is assignable to method class. | |
2039 if (opcode == Bytecodes::_invokespecial) { | |
2040 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2041 } else if (opcode == Bytecodes::_invokevirtual) { | |
2042 VerificationType stack_object_type = | |
2043 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2044 if (current_type() != stack_object_type) { | |
2045 assert(cp->cache() == NULL, "not rewritten yet"); | |
2046 symbolHandle ref_class_name = symbolHandle(THREAD, | |
2047 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
2048 // See the comments in verify_field_instructions() for | |
2049 // the rationale behind this. | |
2050 if (name_in_supers(ref_class_name(), current_class())) { | |
2051 klassOop ref_class = load_class(ref_class_name, CHECK); | |
2052 if (is_protected_access( | |
2053 _klass, ref_class, method_name(), method_sig(), true)) { | |
2054 // It's protected access, check if stack object is | |
2055 // assignable to current class. | |
2056 bool is_assignable = current_type().is_assignable_from( | |
2057 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
2058 if (!is_assignable) { | |
2059 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2060 && stack_object_type.is_array() | |
2061 && method_name() == vmSymbols::clone_name()) { | |
2062 // Special case: arrays pretend to implement public Object | |
2063 // clone(). | |
2064 } else { | |
2065 verify_error(bci, | |
2066 "Bad access to protected data in invokevirtual"); | |
2067 return; | |
2068 } | |
2069 } | |
2070 } | |
2071 } | |
2072 } | |
2073 } else { | |
2074 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2075 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2076 } | |
2077 } | |
2078 } | |
2079 // Push the result type. | |
2080 if (sig_stream.type() != T_VOID) { | |
2081 if (method_name() == vmSymbols::object_initializer_name()) { | |
2082 // <init> method must have a void return type | |
2083 verify_error(bci, "Return type must be void in <init> method"); | |
2084 return; | |
2085 } | |
2086 VerificationType return_type[2]; | |
2087 int n = change_sig_to_verificationType( | |
2088 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2089 for (int i = 0; i < n; i++) { | |
2090 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2091 } | |
2092 } | |
2093 } | |
2094 | |
2095 VerificationType ClassVerifier::get_newarray_type( | |
2096 u2 index, u2 bci, TRAPS) { | |
2097 const char* from_bt[] = { | |
2098 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2099 }; | |
2100 if (index < T_BOOLEAN || index > T_LONG) { | |
2101 verify_error(bci, "Illegal newarray instruction"); | |
2102 return VerificationType::bogus_type(); | |
2103 } | |
2104 | |
2105 // from_bt[index] contains the array signature which has a length of 2 | |
2106 symbolHandle sig = oopFactory::new_symbol_handle( | |
2107 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
2108 return VerificationType::reference_type(sig); | |
2109 } | |
2110 | |
2111 void ClassVerifier::verify_anewarray( | |
2112 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2113 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2114 current_frame->pop_stack( | |
2115 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2116 | |
2117 VerificationType component_type = | |
2118 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2119 ResourceMark rm(THREAD); | |
2120 int length; | |
2121 char* arr_sig_str; | |
2122 if (component_type.is_array()) { // it's an array | |
2123 const char* component_name = component_type.name()->as_utf8(); | |
2124 // add one dimension to component | |
2125 length = (int)strlen(component_name) + 1; | |
2126 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2127 arr_sig_str[0] = '['; | |
2128 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2129 } else { // it's an object or interface | |
2130 const char* component_name = component_type.name()->as_utf8(); | |
2131 // add one dimension to component with 'L' prepended and ';' postpended. | |
2132 length = (int)strlen(component_name) + 3; | |
2133 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2134 arr_sig_str[0] = '['; | |
2135 arr_sig_str[1] = 'L'; | |
2136 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2137 arr_sig_str[length - 1] = ';'; | |
2138 } | |
2139 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
2140 arr_sig_str, length, CHECK_VERIFY(this)); | |
2141 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2142 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2143 } | |
2144 | |
2145 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2146 current_frame->get_local( | |
2147 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2148 current_frame->push_stack( | |
2149 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2150 } | |
2151 | |
2152 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2153 current_frame->get_local_2( | |
2154 index, VerificationType::long_type(), | |
2155 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2156 current_frame->push_stack_2( | |
2157 VerificationType::long_type(), | |
2158 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2159 } | |
2160 | |
2161 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2162 current_frame->get_local( | |
2163 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2164 current_frame->push_stack( | |
2165 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2166 } | |
2167 | |
2168 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2169 current_frame->get_local_2( | |
2170 index, VerificationType::double_type(), | |
2171 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2172 current_frame->push_stack_2( | |
2173 VerificationType::double_type(), | |
2174 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2175 } | |
2176 | |
2177 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2178 VerificationType type = current_frame->get_local( | |
2179 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2180 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2181 } | |
2182 | |
2183 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2184 current_frame->pop_stack( | |
2185 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2186 current_frame->set_local( | |
2187 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2188 } | |
2189 | |
2190 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2191 current_frame->pop_stack_2( | |
2192 VerificationType::long2_type(), | |
2193 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2194 current_frame->set_local_2( | |
2195 index, VerificationType::long_type(), | |
2196 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2197 } | |
2198 | |
2199 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2200 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2201 current_frame->set_local( | |
2202 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2203 } | |
2204 | |
2205 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2206 current_frame->pop_stack_2( | |
2207 VerificationType::double2_type(), | |
2208 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2209 current_frame->set_local_2( | |
2210 index, VerificationType::double_type(), | |
2211 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2212 } | |
2213 | |
2214 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2215 VerificationType type = current_frame->pop_stack( | |
2216 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2217 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2218 } | |
2219 | |
2220 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2221 VerificationType type = current_frame->get_local( | |
2222 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2223 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2224 } | |
2225 | |
2226 void ClassVerifier::verify_return_value( | |
2227 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2228 if (return_type == VerificationType::bogus_type()) { | |
2229 verify_error(bci, "Method expects a return value"); | |
2230 return; | |
2231 } | |
2232 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
2233 if (!match) { | |
2234 verify_error(bci, "Bad return type"); | |
2235 return; | |
2236 } | |
2237 } |