Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.cpp @ 1764:14197af1010e
Merge
author | never |
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date | Fri, 27 Aug 2010 17:35:08 -0700 |
parents | 7f0fdccac34f |
children | 3b2dea75431e 1070423b51f3 |
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 | |
250 void ClassVerifier::verify_class(TRAPS) { | |
251 if (_verify_verbose) { | |
252 tty->print_cr("Verifying class %s with new format", | |
253 _klass->external_name()); | |
254 } | |
255 | |
256 objArrayHandle methods(THREAD, _klass->methods()); | |
257 int num_methods = methods->length(); | |
258 | |
259 for (int index = 0; index < num_methods; index++) { | |
1570 | 260 // Check for recursive re-verification before each method. |
261 if (was_recursively_verified()) return; | |
262 | |
0 | 263 methodOop m = (methodOop)methods->obj_at(index); |
264 if (m->is_native() || m->is_abstract()) { | |
265 // If m is native or abstract, skip it. It is checked in class file | |
266 // parser that methods do not override a final method. | |
267 continue; | |
268 } | |
269 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
270 } | |
1570 | 271 |
272 if (_verify_verbose || TraceClassInitialization) { | |
273 if (was_recursively_verified()) | |
274 tty->print_cr("Recursive verification detected for: %s", | |
275 _klass->external_name()); | |
276 } | |
0 | 277 } |
278 | |
279 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
280 ResourceMark rm(THREAD); | |
281 _method = m; // initialize _method | |
282 if (_verify_verbose) { | |
283 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
284 } | |
285 | |
286 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
287 | |
288 int32_t max_stack = m->max_stack(); | |
289 int32_t max_locals = m->max_locals(); | |
290 constantPoolHandle cp(THREAD, m->constants()); | |
291 | |
292 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
293 class_format_error("Invalid method signature"); | |
294 return; | |
295 } | |
296 | |
297 // Initial stack map frame: offset is 0, stack is initially empty. | |
298 StackMapFrame current_frame(max_locals, max_stack, this); | |
299 // Set initial locals | |
300 VerificationType return_type = current_frame.set_locals_from_arg( | |
301 m, current_type(), CHECK_VERIFY(this)); | |
302 | |
303 int32_t stackmap_index = 0; // index to the stackmap array | |
304 | |
305 u4 code_length = m->code_size(); | |
306 | |
307 // Scan the bytecode and map each instruction's start offset to a number. | |
308 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
309 | |
310 int ex_min = code_length; | |
311 int ex_max = -1; | |
312 // Look through each item on the exception table. Each of the fields must refer | |
313 // to a legal instruction. | |
314 verify_exception_handler_table( | |
315 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
316 | |
317 // Look through each entry on the local variable table and make sure | |
318 // its range of code array offsets is valid. (4169817) | |
319 if (m->has_localvariable_table()) { | |
320 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
321 } | |
322 | |
323 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
324 StackMapStream stream(stackmap_data); | |
325 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
326 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
327 code_data, code_length, CHECK_VERIFY(this)); | |
328 | |
329 if (_verify_verbose) { | |
330 stackmap_table.print(); | |
331 } | |
332 | |
333 RawBytecodeStream bcs(m); | |
334 | |
335 // Scan the byte code linearly from the start to the end | |
336 bool no_control_flow = false; // Set to true when there is no direct control | |
337 // flow from current instruction to the next | |
338 // instruction in sequence | |
339 Bytecodes::Code opcode; | |
340 while (!bcs.is_last_bytecode()) { | |
1570 | 341 // Check for recursive re-verification before each bytecode. |
342 if (was_recursively_verified()) return; | |
343 | |
0 | 344 opcode = bcs.raw_next(); |
345 u2 bci = bcs.bci(); | |
346 | |
347 // Set current frame's offset to bci | |
348 current_frame.set_offset(bci); | |
349 | |
350 // Make sure every offset in stackmap table point to the beginning to | |
351 // an instruction. Match current_frame to stackmap_table entry with | |
352 // the same offset if exists. | |
353 stackmap_index = verify_stackmap_table( | |
354 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
355 no_control_flow, CHECK_VERIFY(this)); | |
356 | |
357 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
358 | |
359 // Merge with the next instruction | |
360 { | |
361 u2 index; | |
362 int target; | |
363 VerificationType type, type2; | |
364 VerificationType atype; | |
365 | |
366 #ifndef PRODUCT | |
367 if (_verify_verbose) { | |
368 current_frame.print(); | |
369 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
370 } | |
371 #endif | |
372 | |
373 // Make sure wide instruction is in correct format | |
374 if (bcs.is_wide()) { | |
375 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
376 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
377 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
378 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
379 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
380 opcode != Bytecodes::_dstore) { | |
381 verify_error(bci, "Bad wide instruction"); | |
382 return; | |
383 } | |
384 } | |
385 | |
386 switch (opcode) { | |
387 case Bytecodes::_nop : | |
388 no_control_flow = false; break; | |
389 case Bytecodes::_aconst_null : | |
390 current_frame.push_stack( | |
391 VerificationType::null_type(), CHECK_VERIFY(this)); | |
392 no_control_flow = false; break; | |
393 case Bytecodes::_iconst_m1 : | |
394 case Bytecodes::_iconst_0 : | |
395 case Bytecodes::_iconst_1 : | |
396 case Bytecodes::_iconst_2 : | |
397 case Bytecodes::_iconst_3 : | |
398 case Bytecodes::_iconst_4 : | |
399 case Bytecodes::_iconst_5 : | |
400 current_frame.push_stack( | |
401 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
402 no_control_flow = false; break; | |
403 case Bytecodes::_lconst_0 : | |
404 case Bytecodes::_lconst_1 : | |
405 current_frame.push_stack_2( | |
406 VerificationType::long_type(), | |
407 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
408 no_control_flow = false; break; | |
409 case Bytecodes::_fconst_0 : | |
410 case Bytecodes::_fconst_1 : | |
411 case Bytecodes::_fconst_2 : | |
412 current_frame.push_stack( | |
413 VerificationType::float_type(), CHECK_VERIFY(this)); | |
414 no_control_flow = false; break; | |
415 case Bytecodes::_dconst_0 : | |
416 case Bytecodes::_dconst_1 : | |
417 current_frame.push_stack_2( | |
418 VerificationType::double_type(), | |
419 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
420 no_control_flow = false; break; | |
421 case Bytecodes::_sipush : | |
422 case Bytecodes::_bipush : | |
423 current_frame.push_stack( | |
424 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
425 no_control_flow = false; break; | |
426 case Bytecodes::_ldc : | |
427 verify_ldc( | |
1565 | 428 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 429 cp, bci, CHECK_VERIFY(this)); |
430 no_control_flow = false; break; | |
431 case Bytecodes::_ldc_w : | |
432 case Bytecodes::_ldc2_w : | |
433 verify_ldc( | |
1565 | 434 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 435 cp, bci, CHECK_VERIFY(this)); |
436 no_control_flow = false; break; | |
437 case Bytecodes::_iload : | |
438 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
439 no_control_flow = false; break; | |
440 case Bytecodes::_iload_0 : | |
441 case Bytecodes::_iload_1 : | |
442 case Bytecodes::_iload_2 : | |
443 case Bytecodes::_iload_3 : | |
444 index = opcode - Bytecodes::_iload_0; | |
445 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
446 no_control_flow = false; break; | |
447 case Bytecodes::_lload : | |
448 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
449 no_control_flow = false; break; | |
450 case Bytecodes::_lload_0 : | |
451 case Bytecodes::_lload_1 : | |
452 case Bytecodes::_lload_2 : | |
453 case Bytecodes::_lload_3 : | |
454 index = opcode - Bytecodes::_lload_0; | |
455 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
456 no_control_flow = false; break; | |
457 case Bytecodes::_fload : | |
458 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
459 no_control_flow = false; break; | |
460 case Bytecodes::_fload_0 : | |
461 case Bytecodes::_fload_1 : | |
462 case Bytecodes::_fload_2 : | |
463 case Bytecodes::_fload_3 : | |
464 index = opcode - Bytecodes::_fload_0; | |
465 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
466 no_control_flow = false; break; | |
467 case Bytecodes::_dload : | |
468 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
469 no_control_flow = false; break; | |
470 case Bytecodes::_dload_0 : | |
471 case Bytecodes::_dload_1 : | |
472 case Bytecodes::_dload_2 : | |
473 case Bytecodes::_dload_3 : | |
474 index = opcode - Bytecodes::_dload_0; | |
475 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
476 no_control_flow = false; break; | |
477 case Bytecodes::_aload : | |
478 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
479 no_control_flow = false; break; | |
480 case Bytecodes::_aload_0 : | |
481 case Bytecodes::_aload_1 : | |
482 case Bytecodes::_aload_2 : | |
483 case Bytecodes::_aload_3 : | |
484 index = opcode - Bytecodes::_aload_0; | |
485 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
486 no_control_flow = false; break; | |
487 case Bytecodes::_iaload : | |
488 type = current_frame.pop_stack( | |
489 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
490 atype = current_frame.pop_stack( | |
491 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
492 if (!atype.is_int_array()) { | |
493 verify_error(bci, bad_type_msg, "iaload"); | |
494 return; | |
495 } | |
496 current_frame.push_stack( | |
497 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
498 no_control_flow = false; break; | |
499 case Bytecodes::_baload : | |
500 type = current_frame.pop_stack( | |
501 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
502 atype = current_frame.pop_stack( | |
503 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
504 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
505 verify_error(bci, bad_type_msg, "baload"); | |
506 return; | |
507 } | |
508 current_frame.push_stack( | |
509 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
510 no_control_flow = false; break; | |
511 case Bytecodes::_caload : | |
512 type = current_frame.pop_stack( | |
513 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
514 atype = current_frame.pop_stack( | |
515 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
516 if (!atype.is_char_array()) { | |
517 verify_error(bci, bad_type_msg, "caload"); | |
518 return; | |
519 } | |
520 current_frame.push_stack( | |
521 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
522 no_control_flow = false; break; | |
523 case Bytecodes::_saload : | |
524 type = current_frame.pop_stack( | |
525 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
526 atype = current_frame.pop_stack( | |
527 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
528 if (!atype.is_short_array()) { | |
529 verify_error(bci, bad_type_msg, "saload"); | |
530 return; | |
531 } | |
532 current_frame.push_stack( | |
533 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
534 no_control_flow = false; break; | |
535 case Bytecodes::_laload : | |
536 type = current_frame.pop_stack( | |
537 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
538 atype = current_frame.pop_stack( | |
539 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
540 if (!atype.is_long_array()) { | |
541 verify_error(bci, bad_type_msg, "laload"); | |
542 return; | |
543 } | |
544 current_frame.push_stack_2( | |
545 VerificationType::long_type(), | |
546 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
547 no_control_flow = false; break; | |
548 case Bytecodes::_faload : | |
549 type = current_frame.pop_stack( | |
550 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
551 atype = current_frame.pop_stack( | |
552 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
553 if (!atype.is_float_array()) { | |
554 verify_error(bci, bad_type_msg, "faload"); | |
555 return; | |
556 } | |
557 current_frame.push_stack( | |
558 VerificationType::float_type(), CHECK_VERIFY(this)); | |
559 no_control_flow = false; break; | |
560 case Bytecodes::_daload : | |
561 type = current_frame.pop_stack( | |
562 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
563 atype = current_frame.pop_stack( | |
564 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
565 if (!atype.is_double_array()) { | |
566 verify_error(bci, bad_type_msg, "daload"); | |
567 return; | |
568 } | |
569 current_frame.push_stack_2( | |
570 VerificationType::double_type(), | |
571 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
572 no_control_flow = false; break; | |
573 case Bytecodes::_aaload : { | |
574 type = current_frame.pop_stack( | |
575 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
576 atype = current_frame.pop_stack( | |
577 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
578 if (!atype.is_reference_array()) { | |
579 verify_error(bci, bad_type_msg, "aaload"); | |
580 return; | |
581 } | |
582 if (atype.is_null()) { | |
583 current_frame.push_stack( | |
584 VerificationType::null_type(), CHECK_VERIFY(this)); | |
585 } else { | |
586 VerificationType component = | |
587 atype.get_component(CHECK_VERIFY(this)); | |
588 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
589 } | |
590 no_control_flow = false; break; | |
591 } | |
592 case Bytecodes::_istore : | |
593 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
594 no_control_flow = false; break; | |
595 case Bytecodes::_istore_0 : | |
596 case Bytecodes::_istore_1 : | |
597 case Bytecodes::_istore_2 : | |
598 case Bytecodes::_istore_3 : | |
599 index = opcode - Bytecodes::_istore_0; | |
600 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
601 no_control_flow = false; break; | |
602 case Bytecodes::_lstore : | |
603 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
604 no_control_flow = false; break; | |
605 case Bytecodes::_lstore_0 : | |
606 case Bytecodes::_lstore_1 : | |
607 case Bytecodes::_lstore_2 : | |
608 case Bytecodes::_lstore_3 : | |
609 index = opcode - Bytecodes::_lstore_0; | |
610 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
611 no_control_flow = false; break; | |
612 case Bytecodes::_fstore : | |
613 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
614 no_control_flow = false; break; | |
615 case Bytecodes::_fstore_0 : | |
616 case Bytecodes::_fstore_1 : | |
617 case Bytecodes::_fstore_2 : | |
618 case Bytecodes::_fstore_3 : | |
619 index = opcode - Bytecodes::_fstore_0; | |
620 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
621 no_control_flow = false; break; | |
622 case Bytecodes::_dstore : | |
623 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
624 no_control_flow = false; break; | |
625 case Bytecodes::_dstore_0 : | |
626 case Bytecodes::_dstore_1 : | |
627 case Bytecodes::_dstore_2 : | |
628 case Bytecodes::_dstore_3 : | |
629 index = opcode - Bytecodes::_dstore_0; | |
630 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
631 no_control_flow = false; break; | |
632 case Bytecodes::_astore : | |
633 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
634 no_control_flow = false; break; | |
635 case Bytecodes::_astore_0 : | |
636 case Bytecodes::_astore_1 : | |
637 case Bytecodes::_astore_2 : | |
638 case Bytecodes::_astore_3 : | |
639 index = opcode - Bytecodes::_astore_0; | |
640 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
641 no_control_flow = false; break; | |
642 case Bytecodes::_iastore : | |
643 type = current_frame.pop_stack( | |
644 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
645 type2 = current_frame.pop_stack( | |
646 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
647 atype = current_frame.pop_stack( | |
648 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
649 if (!atype.is_int_array()) { | |
650 verify_error(bci, bad_type_msg, "iastore"); | |
651 return; | |
652 } | |
653 no_control_flow = false; break; | |
654 case Bytecodes::_bastore : | |
655 type = current_frame.pop_stack( | |
656 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
657 type2 = current_frame.pop_stack( | |
658 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
659 atype = current_frame.pop_stack( | |
660 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
661 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
662 verify_error(bci, bad_type_msg, "bastore"); | |
663 return; | |
664 } | |
665 no_control_flow = false; break; | |
666 case Bytecodes::_castore : | |
667 current_frame.pop_stack( | |
668 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
669 current_frame.pop_stack( | |
670 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
671 atype = current_frame.pop_stack( | |
672 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
673 if (!atype.is_char_array()) { | |
674 verify_error(bci, bad_type_msg, "castore"); | |
675 return; | |
676 } | |
677 no_control_flow = false; break; | |
678 case Bytecodes::_sastore : | |
679 current_frame.pop_stack( | |
680 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
681 current_frame.pop_stack( | |
682 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
683 atype = current_frame.pop_stack( | |
684 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
685 if (!atype.is_short_array()) { | |
686 verify_error(bci, bad_type_msg, "sastore"); | |
687 return; | |
688 } | |
689 no_control_flow = false; break; | |
690 case Bytecodes::_lastore : | |
691 current_frame.pop_stack_2( | |
692 VerificationType::long2_type(), | |
693 VerificationType::long_type(), CHECK_VERIFY(this)); | |
694 current_frame.pop_stack( | |
695 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
696 atype = current_frame.pop_stack( | |
697 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
698 if (!atype.is_long_array()) { | |
699 verify_error(bci, bad_type_msg, "lastore"); | |
700 return; | |
701 } | |
702 no_control_flow = false; break; | |
703 case Bytecodes::_fastore : | |
704 current_frame.pop_stack( | |
705 VerificationType::float_type(), CHECK_VERIFY(this)); | |
706 current_frame.pop_stack | |
707 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
708 atype = current_frame.pop_stack( | |
709 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
710 if (!atype.is_float_array()) { | |
711 verify_error(bci, bad_type_msg, "fastore"); | |
712 return; | |
713 } | |
714 no_control_flow = false; break; | |
715 case Bytecodes::_dastore : | |
716 current_frame.pop_stack_2( | |
717 VerificationType::double2_type(), | |
718 VerificationType::double_type(), CHECK_VERIFY(this)); | |
719 current_frame.pop_stack( | |
720 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
721 atype = current_frame.pop_stack( | |
722 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
723 if (!atype.is_double_array()) { | |
724 verify_error(bci, bad_type_msg, "dastore"); | |
725 return; | |
726 } | |
727 no_control_flow = false; break; | |
728 case Bytecodes::_aastore : | |
729 type = current_frame.pop_stack( | |
730 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
731 type2 = current_frame.pop_stack( | |
732 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
733 atype = current_frame.pop_stack( | |
734 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
735 // more type-checking is done at runtime | |
736 if (!atype.is_reference_array()) { | |
737 verify_error(bci, bad_type_msg, "aastore"); | |
738 return; | |
739 } | |
740 // 4938384: relaxed constraint in JVMS 3nd edition. | |
741 no_control_flow = false; break; | |
742 case Bytecodes::_pop : | |
743 current_frame.pop_stack( | |
744 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
745 no_control_flow = false; break; | |
746 case Bytecodes::_pop2 : | |
747 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
748 if (type.is_category1()) { | |
749 current_frame.pop_stack( | |
750 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
751 } else if (type.is_category2_2nd()) { | |
752 current_frame.pop_stack( | |
753 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
754 } else { | |
755 verify_error(bci, bad_type_msg, "pop2"); | |
756 return; | |
757 } | |
758 no_control_flow = false; break; | |
759 case Bytecodes::_dup : | |
760 type = current_frame.pop_stack( | |
761 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
762 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
763 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
764 no_control_flow = false; break; | |
765 case Bytecodes::_dup_x1 : | |
766 type = current_frame.pop_stack( | |
767 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
768 type2 = current_frame.pop_stack( | |
769 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
770 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
771 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
772 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
773 no_control_flow = false; break; | |
774 case Bytecodes::_dup_x2 : | |
775 { | |
776 VerificationType type3; | |
777 type = current_frame.pop_stack( | |
778 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
779 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
780 if (type2.is_category1()) { | |
781 type3 = current_frame.pop_stack( | |
782 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
783 } else if (type2.is_category2_2nd()) { | |
784 type3 = current_frame.pop_stack( | |
785 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
786 } else { | |
787 verify_error(bci, bad_type_msg, "dup_x2"); | |
788 return; | |
789 } | |
790 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
791 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
792 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
793 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
794 no_control_flow = false; break; | |
795 } | |
796 case Bytecodes::_dup2 : | |
797 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
798 if (type.is_category1()) { | |
799 type2 = current_frame.pop_stack( | |
800 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
801 } else if (type.is_category2_2nd()) { | |
802 type2 = current_frame.pop_stack( | |
803 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
804 } else { | |
805 verify_error(bci, bad_type_msg, "dup2"); | |
806 return; | |
807 } | |
808 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
809 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
810 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
811 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
812 no_control_flow = false; break; | |
813 case Bytecodes::_dup2_x1 : | |
814 { | |
815 VerificationType type3; | |
816 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
817 if (type.is_category1()) { | |
818 type2 = current_frame.pop_stack( | |
819 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
820 } else if(type.is_category2_2nd()) { | |
821 type2 = current_frame.pop_stack | |
822 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
823 } else { | |
824 verify_error(bci, bad_type_msg, "dup2_x1"); | |
825 return; | |
826 } | |
827 type3 = current_frame.pop_stack( | |
828 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
829 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
830 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
831 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
832 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
833 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
834 no_control_flow = false; break; | |
835 } | |
836 case Bytecodes::_dup2_x2 : | |
837 { | |
838 VerificationType type3, type4; | |
839 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
840 if (type.is_category1()) { | |
841 type2 = current_frame.pop_stack( | |
842 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
843 } else if (type.is_category2_2nd()) { | |
844 type2 = current_frame.pop_stack( | |
845 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
846 } else { | |
847 verify_error(bci, bad_type_msg, "dup2_x2"); | |
848 return; | |
849 } | |
850 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
851 if (type3.is_category1()) { | |
852 type4 = current_frame.pop_stack( | |
853 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
854 } else if (type3.is_category2_2nd()) { | |
855 type4 = current_frame.pop_stack( | |
856 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
857 } else { | |
858 verify_error(bci, bad_type_msg, "dup2_x2"); | |
859 return; | |
860 } | |
861 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
862 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
863 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
864 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
865 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
866 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
867 no_control_flow = false; break; | |
868 } | |
869 case Bytecodes::_swap : | |
870 type = current_frame.pop_stack( | |
871 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
872 type2 = current_frame.pop_stack( | |
873 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
874 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
875 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
876 no_control_flow = false; break; | |
877 case Bytecodes::_iadd : | |
878 case Bytecodes::_isub : | |
879 case Bytecodes::_imul : | |
880 case Bytecodes::_idiv : | |
881 case Bytecodes::_irem : | |
882 case Bytecodes::_ishl : | |
883 case Bytecodes::_ishr : | |
884 case Bytecodes::_iushr : | |
885 case Bytecodes::_ior : | |
886 case Bytecodes::_ixor : | |
887 case Bytecodes::_iand : | |
888 current_frame.pop_stack( | |
889 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
890 // fall through | |
891 case Bytecodes::_ineg : | |
892 current_frame.pop_stack( | |
893 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
894 current_frame.push_stack( | |
895 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
896 no_control_flow = false; break; | |
897 case Bytecodes::_ladd : | |
898 case Bytecodes::_lsub : | |
899 case Bytecodes::_lmul : | |
900 case Bytecodes::_ldiv : | |
901 case Bytecodes::_lrem : | |
902 case Bytecodes::_land : | |
903 case Bytecodes::_lor : | |
904 case Bytecodes::_lxor : | |
905 current_frame.pop_stack_2( | |
906 VerificationType::long2_type(), | |
907 VerificationType::long_type(), CHECK_VERIFY(this)); | |
908 // fall through | |
909 case Bytecodes::_lneg : | |
910 current_frame.pop_stack_2( | |
911 VerificationType::long2_type(), | |
912 VerificationType::long_type(), CHECK_VERIFY(this)); | |
913 current_frame.push_stack_2( | |
914 VerificationType::long_type(), | |
915 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
916 no_control_flow = false; break; | |
917 case Bytecodes::_lshl : | |
918 case Bytecodes::_lshr : | |
919 case Bytecodes::_lushr : | |
920 current_frame.pop_stack( | |
921 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
922 current_frame.pop_stack_2( | |
923 VerificationType::long2_type(), | |
924 VerificationType::long_type(), CHECK_VERIFY(this)); | |
925 current_frame.push_stack_2( | |
926 VerificationType::long_type(), | |
927 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
928 no_control_flow = false; break; | |
929 case Bytecodes::_fadd : | |
930 case Bytecodes::_fsub : | |
931 case Bytecodes::_fmul : | |
932 case Bytecodes::_fdiv : | |
933 case Bytecodes::_frem : | |
934 current_frame.pop_stack( | |
935 VerificationType::float_type(), CHECK_VERIFY(this)); | |
936 // fall through | |
937 case Bytecodes::_fneg : | |
938 current_frame.pop_stack( | |
939 VerificationType::float_type(), CHECK_VERIFY(this)); | |
940 current_frame.push_stack( | |
941 VerificationType::float_type(), CHECK_VERIFY(this)); | |
942 no_control_flow = false; break; | |
943 case Bytecodes::_dadd : | |
944 case Bytecodes::_dsub : | |
945 case Bytecodes::_dmul : | |
946 case Bytecodes::_ddiv : | |
947 case Bytecodes::_drem : | |
948 current_frame.pop_stack_2( | |
949 VerificationType::double2_type(), | |
950 VerificationType::double_type(), CHECK_VERIFY(this)); | |
951 // fall through | |
952 case Bytecodes::_dneg : | |
953 current_frame.pop_stack_2( | |
954 VerificationType::double2_type(), | |
955 VerificationType::double_type(), CHECK_VERIFY(this)); | |
956 current_frame.push_stack_2( | |
957 VerificationType::double_type(), | |
958 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
959 no_control_flow = false; break; | |
960 case Bytecodes::_iinc : | |
961 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
962 no_control_flow = false; break; | |
963 case Bytecodes::_i2l : | |
964 type = current_frame.pop_stack( | |
965 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
966 current_frame.push_stack_2( | |
967 VerificationType::long_type(), | |
968 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
969 no_control_flow = false; break; | |
970 case Bytecodes::_l2i : | |
971 current_frame.pop_stack_2( | |
972 VerificationType::long2_type(), | |
973 VerificationType::long_type(), CHECK_VERIFY(this)); | |
974 current_frame.push_stack( | |
975 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
976 no_control_flow = false; break; | |
977 case Bytecodes::_i2f : | |
978 current_frame.pop_stack( | |
979 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
980 current_frame.push_stack( | |
981 VerificationType::float_type(), CHECK_VERIFY(this)); | |
982 no_control_flow = false; break; | |
983 case Bytecodes::_i2d : | |
984 current_frame.pop_stack( | |
985 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
986 current_frame.push_stack_2( | |
987 VerificationType::double_type(), | |
988 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
989 no_control_flow = false; break; | |
990 case Bytecodes::_l2f : | |
991 current_frame.pop_stack_2( | |
992 VerificationType::long2_type(), | |
993 VerificationType::long_type(), CHECK_VERIFY(this)); | |
994 current_frame.push_stack( | |
995 VerificationType::float_type(), CHECK_VERIFY(this)); | |
996 no_control_flow = false; break; | |
997 case Bytecodes::_l2d : | |
998 current_frame.pop_stack_2( | |
999 VerificationType::long2_type(), | |
1000 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1001 current_frame.push_stack_2( | |
1002 VerificationType::double_type(), | |
1003 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1004 no_control_flow = false; break; | |
1005 case Bytecodes::_f2i : | |
1006 current_frame.pop_stack( | |
1007 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1008 current_frame.push_stack( | |
1009 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1010 no_control_flow = false; break; | |
1011 case Bytecodes::_f2l : | |
1012 current_frame.pop_stack( | |
1013 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1014 current_frame.push_stack_2( | |
1015 VerificationType::long_type(), | |
1016 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1017 no_control_flow = false; break; | |
1018 case Bytecodes::_f2d : | |
1019 current_frame.pop_stack( | |
1020 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1021 current_frame.push_stack_2( | |
1022 VerificationType::double_type(), | |
1023 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1024 no_control_flow = false; break; | |
1025 case Bytecodes::_d2i : | |
1026 current_frame.pop_stack_2( | |
1027 VerificationType::double2_type(), | |
1028 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1029 current_frame.push_stack( | |
1030 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1031 no_control_flow = false; break; | |
1032 case Bytecodes::_d2l : | |
1033 current_frame.pop_stack_2( | |
1034 VerificationType::double2_type(), | |
1035 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1036 current_frame.push_stack_2( | |
1037 VerificationType::long_type(), | |
1038 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1039 no_control_flow = false; break; | |
1040 case Bytecodes::_d2f : | |
1041 current_frame.pop_stack_2( | |
1042 VerificationType::double2_type(), | |
1043 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1044 current_frame.push_stack( | |
1045 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1046 no_control_flow = false; break; | |
1047 case Bytecodes::_i2b : | |
1048 case Bytecodes::_i2c : | |
1049 case Bytecodes::_i2s : | |
1050 current_frame.pop_stack( | |
1051 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1052 current_frame.push_stack( | |
1053 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1054 no_control_flow = false; break; | |
1055 case Bytecodes::_lcmp : | |
1056 current_frame.pop_stack_2( | |
1057 VerificationType::long2_type(), | |
1058 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1059 current_frame.pop_stack_2( | |
1060 VerificationType::long2_type(), | |
1061 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1062 current_frame.push_stack( | |
1063 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1064 no_control_flow = false; break; | |
1065 case Bytecodes::_fcmpl : | |
1066 case Bytecodes::_fcmpg : | |
1067 current_frame.pop_stack( | |
1068 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1069 current_frame.pop_stack( | |
1070 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1071 current_frame.push_stack( | |
1072 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1073 no_control_flow = false; break; | |
1074 case Bytecodes::_dcmpl : | |
1075 case Bytecodes::_dcmpg : | |
1076 current_frame.pop_stack_2( | |
1077 VerificationType::double2_type(), | |
1078 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1079 current_frame.pop_stack_2( | |
1080 VerificationType::double2_type(), | |
1081 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1082 current_frame.push_stack( | |
1083 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1084 no_control_flow = false; break; | |
1085 case Bytecodes::_if_icmpeq: | |
1086 case Bytecodes::_if_icmpne: | |
1087 case Bytecodes::_if_icmplt: | |
1088 case Bytecodes::_if_icmpge: | |
1089 case Bytecodes::_if_icmpgt: | |
1090 case Bytecodes::_if_icmple: | |
1091 current_frame.pop_stack( | |
1092 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1093 // fall through | |
1094 case Bytecodes::_ifeq: | |
1095 case Bytecodes::_ifne: | |
1096 case Bytecodes::_iflt: | |
1097 case Bytecodes::_ifge: | |
1098 case Bytecodes::_ifgt: | |
1099 case Bytecodes::_ifle: | |
1100 current_frame.pop_stack( | |
1101 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1102 target = bcs.dest(); | |
1103 stackmap_table.check_jump_target( | |
1104 ¤t_frame, target, CHECK_VERIFY(this)); | |
1105 no_control_flow = false; break; | |
1106 case Bytecodes::_if_acmpeq : | |
1107 case Bytecodes::_if_acmpne : | |
1108 current_frame.pop_stack( | |
1109 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1110 // fall through | |
1111 case Bytecodes::_ifnull : | |
1112 case Bytecodes::_ifnonnull : | |
1113 current_frame.pop_stack( | |
1114 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1115 target = bcs.dest(); | |
1116 stackmap_table.check_jump_target | |
1117 (¤t_frame, target, CHECK_VERIFY(this)); | |
1118 no_control_flow = false; break; | |
1119 case Bytecodes::_goto : | |
1120 target = bcs.dest(); | |
1121 stackmap_table.check_jump_target( | |
1122 ¤t_frame, target, CHECK_VERIFY(this)); | |
1123 no_control_flow = true; break; | |
1124 case Bytecodes::_goto_w : | |
1125 target = bcs.dest_w(); | |
1126 stackmap_table.check_jump_target( | |
1127 ¤t_frame, target, CHECK_VERIFY(this)); | |
1128 no_control_flow = true; break; | |
1129 case Bytecodes::_tableswitch : | |
1130 case Bytecodes::_lookupswitch : | |
1131 verify_switch( | |
1132 &bcs, code_length, code_data, ¤t_frame, | |
1133 &stackmap_table, CHECK_VERIFY(this)); | |
1134 no_control_flow = true; break; | |
1135 case Bytecodes::_ireturn : | |
1136 type = current_frame.pop_stack( | |
1137 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1138 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1139 no_control_flow = true; break; | |
1140 case Bytecodes::_lreturn : | |
1141 type2 = current_frame.pop_stack( | |
1142 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1143 type = current_frame.pop_stack( | |
1144 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1145 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1146 no_control_flow = true; break; | |
1147 case Bytecodes::_freturn : | |
1148 type = current_frame.pop_stack( | |
1149 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1150 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1151 no_control_flow = true; break; | |
1152 case Bytecodes::_dreturn : | |
1153 type2 = current_frame.pop_stack( | |
1154 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1155 type = current_frame.pop_stack( | |
1156 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1157 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1158 no_control_flow = true; break; | |
1159 case Bytecodes::_areturn : | |
1160 type = current_frame.pop_stack( | |
1161 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1162 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1163 no_control_flow = true; break; | |
1164 case Bytecodes::_return : | |
1165 if (return_type != VerificationType::bogus_type()) { | |
1166 verify_error(bci, "Method expects no return value"); | |
1167 return; | |
1168 } | |
1169 // Make sure "this" has been initialized if current method is an | |
1170 // <init> | |
1171 if (_method->name() == vmSymbols::object_initializer_name() && | |
1172 current_frame.flag_this_uninit()) { | |
1173 verify_error(bci, | |
1174 "Constructor must call super() or this() before return"); | |
1175 return; | |
1176 } | |
1177 no_control_flow = true; break; | |
1178 case Bytecodes::_getstatic : | |
1179 case Bytecodes::_putstatic : | |
1180 case Bytecodes::_getfield : | |
1181 case Bytecodes::_putfield : | |
1182 verify_field_instructions( | |
1183 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1184 no_control_flow = false; break; | |
1185 case Bytecodes::_invokevirtual : | |
1186 case Bytecodes::_invokespecial : | |
1187 case Bytecodes::_invokestatic : | |
1188 verify_invoke_instructions( | |
1189 &bcs, code_length, ¤t_frame, | |
1190 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1191 no_control_flow = false; break; | |
1192 case Bytecodes::_invokeinterface : | |
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1193 case Bytecodes::_invokedynamic : |
0 | 1194 verify_invoke_instructions( |
1195 &bcs, code_length, ¤t_frame, | |
1196 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1197 no_control_flow = false; break; | |
1198 case Bytecodes::_new : | |
1199 { | |
1565 | 1200 index = bcs.get_index_u2(); |
0 | 1201 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1202 VerificationType new_class_type = | |
1203 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1204 if (!new_class_type.is_object()) { | |
1205 verify_error(bci, "Illegal new instruction"); | |
1206 return; | |
1207 } | |
1208 type = VerificationType::uninitialized_type(bci); | |
1209 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1210 no_control_flow = false; break; | |
1211 } | |
1212 case Bytecodes::_newarray : | |
1213 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1214 current_frame.pop_stack( | |
1215 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1216 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1217 no_control_flow = false; break; | |
1218 case Bytecodes::_anewarray : | |
1219 verify_anewarray( | |
1565 | 1220 bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1221 no_control_flow = false; break; |
1222 case Bytecodes::_arraylength : | |
1223 type = current_frame.pop_stack( | |
1224 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1225 if (!(type.is_null() || type.is_array())) { |
0 | 1226 verify_error(bci, bad_type_msg, "arraylength"); |
1227 } | |
1228 current_frame.push_stack( | |
1229 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1230 no_control_flow = false; break; | |
1231 case Bytecodes::_checkcast : | |
1232 { | |
1565 | 1233 index = bcs.get_index_u2(); |
0 | 1234 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1235 current_frame.pop_stack( | |
1236 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1237 VerificationType klass_type = cp_index_to_type( | |
1238 index, cp, CHECK_VERIFY(this)); | |
1239 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1240 no_control_flow = false; break; | |
1241 } | |
1242 case Bytecodes::_instanceof : { | |
1565 | 1243 index = bcs.get_index_u2(); |
0 | 1244 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1245 current_frame.pop_stack( | |
1246 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1247 current_frame.push_stack( | |
1248 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1249 no_control_flow = false; break; | |
1250 } | |
1251 case Bytecodes::_monitorenter : | |
1252 case Bytecodes::_monitorexit : | |
1253 current_frame.pop_stack( | |
1254 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1255 no_control_flow = false; break; | |
1256 case Bytecodes::_multianewarray : | |
1257 { | |
1565 | 1258 index = bcs.get_index_u2(); |
0 | 1259 u2 dim = *(bcs.bcp()+3); |
1260 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1261 VerificationType new_array_type = | |
1262 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1263 if (!new_array_type.is_array()) { | |
1264 verify_error(bci, | |
1265 "Illegal constant pool index in multianewarray instruction"); | |
1266 return; | |
1267 } | |
1268 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1269 verify_error(bci, | |
1270 "Illegal dimension in multianewarray instruction"); | |
1271 return; | |
1272 } | |
1273 for (int i = 0; i < dim; i++) { | |
1274 current_frame.pop_stack( | |
1275 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1276 } | |
1277 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1278 no_control_flow = false; break; | |
1279 } | |
1280 case Bytecodes::_athrow : | |
1281 type = VerificationType::reference_type( | |
1282 vmSymbols::java_lang_Throwable()); | |
1283 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1284 no_control_flow = true; break; | |
1285 default: | |
1286 // We only need to check the valid bytecodes in class file. | |
1287 // And jsr and ret are not in the new class file format in JDK1.5. | |
1288 verify_error(bci, "Bad instruction"); | |
1289 no_control_flow = false; | |
1290 return; | |
1291 } // end switch | |
1292 } // end Merge with the next instruction | |
1293 | |
1294 // Look for possible jump target in exception handlers and see if it | |
1295 // matches current_frame | |
1296 if (bci >= ex_min && bci < ex_max) { | |
1297 verify_exception_handler_targets( | |
1298 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1299 } | |
1300 } // end while | |
1301 | |
1302 // Make sure that control flow does not fall through end of the method | |
1303 if (!no_control_flow) { | |
1304 verify_error(code_length, "Control flow falls through code end"); | |
1305 return; | |
1306 } | |
1307 } | |
1308 | |
1309 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1310 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1311 memset(code_data, 0, sizeof(char) * code_length); | |
1312 RawBytecodeStream bcs(m); | |
1313 | |
1314 while (!bcs.is_last_bytecode()) { | |
1315 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1316 int bci = bcs.bci(); | |
1565 | 1317 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1318 code_data[bci] = NEW_OFFSET; |
1319 } else { | |
1320 code_data[bci] = BYTECODE_OFFSET; | |
1321 } | |
1322 } else { | |
1323 verify_error(bcs.bci(), "Bad instruction"); | |
1324 return NULL; | |
1325 } | |
1326 } | |
1327 | |
1328 return code_data; | |
1329 } | |
1330 | |
1331 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1332 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1333 constantPoolHandle cp (THREAD, _method->constants()); | |
1334 | |
1335 if (exhandlers() != NULL) { | |
1336 for(int i = 0; i < exhandlers->length();) { | |
1337 u2 start_pc = exhandlers->int_at(i++); | |
1338 u2 end_pc = exhandlers->int_at(i++); | |
1339 u2 handler_pc = exhandlers->int_at(i++); | |
1340 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1341 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1342 return; | |
1343 } | |
1344 if (end_pc != code_length) { // special case: end_pc == code_length | |
1345 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1346 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1347 return; | |
1348 } | |
1349 } | |
1350 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1351 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1352 return; | |
1353 } | |
1354 int catch_type_index = exhandlers->int_at(i++); | |
1355 if (catch_type_index != 0) { | |
1356 VerificationType catch_type = cp_index_to_type( | |
1357 catch_type_index, cp, CHECK_VERIFY(this)); | |
1358 VerificationType throwable = | |
1359 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1360 bool is_subclass = throwable.is_assignable_from( | |
1361 catch_type, current_class(), CHECK_VERIFY(this)); | |
1362 if (!is_subclass) { | |
1363 // 4286534: should throw VerifyError according to recent spec change | |
1364 verify_error( | |
1365 "Catch type is not a subclass of Throwable in handler %d", | |
1366 handler_pc); | |
1367 return; | |
1368 } | |
1369 } | |
1370 if (start_pc < min) min = start_pc; | |
1371 if (end_pc > max) max = end_pc; | |
1372 } | |
1373 } | |
1374 } | |
1375 | |
1376 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1377 int localvariable_table_length = _method()->localvariable_table_length(); | |
1378 if (localvariable_table_length > 0) { | |
1379 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1380 for (int i = 0; i < localvariable_table_length; i++) { | |
1381 u2 start_bci = table[i].start_bci; | |
1382 u2 length = table[i].length; | |
1383 | |
1384 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1385 class_format_error( | |
1386 "Illegal local variable table start_pc %d", start_bci); | |
1387 return; | |
1388 } | |
1389 u4 end_bci = (u4)(start_bci + length); | |
1390 if (end_bci != code_length) { | |
1391 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1392 class_format_error( "Illegal local variable table length %d", length); | |
1393 return; | |
1394 } | |
1395 } | |
1396 } | |
1397 } | |
1398 } | |
1399 | |
1400 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1401 StackMapFrame* current_frame, | |
1402 StackMapTable* stackmap_table, | |
1403 bool no_control_flow, TRAPS) { | |
1404 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1405 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1406 if (no_control_flow && this_offset > bci) { | |
1407 verify_error(bci, "Expecting a stack map frame"); | |
1408 return 0; | |
1409 } | |
1410 if (this_offset == bci) { | |
1411 // See if current stack map can be assigned to the frame in table. | |
1412 // current_frame is the stackmap frame got from the last instruction. | |
1413 // If matched, current_frame will be updated by this method. | |
1414 bool match = stackmap_table->match_stackmap( | |
1415 current_frame, this_offset, stackmap_index, | |
1416 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1417 if (!match) { | |
1418 // report type error | |
1419 verify_error(bci, "Instruction type does not match stack map"); | |
1420 return 0; | |
1421 } | |
1422 stackmap_index++; | |
1423 } else if (this_offset < bci) { | |
1424 // current_offset should have met this_offset. | |
1425 class_format_error("Bad stack map offset %d", this_offset); | |
1426 return 0; | |
1427 } | |
1428 } else if (no_control_flow) { | |
1429 verify_error(bci, "Expecting a stack map frame"); | |
1430 return 0; | |
1431 } | |
1432 return stackmap_index; | |
1433 } | |
1434 | |
1435 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1436 StackMapTable* stackmap_table, TRAPS) { | |
1437 constantPoolHandle cp (THREAD, _method->constants()); | |
1438 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1439 if (exhandlers() != NULL) { | |
1440 for(int i = 0; i < exhandlers->length();) { | |
1441 u2 start_pc = exhandlers->int_at(i++); | |
1442 u2 end_pc = exhandlers->int_at(i++); | |
1443 u2 handler_pc = exhandlers->int_at(i++); | |
1444 int catch_type_index = exhandlers->int_at(i++); | |
1445 if(bci >= start_pc && bci < end_pc) { | |
1446 u1 flags = current_frame->flags(); | |
1447 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1448 | |
1449 ResourceMark rm(THREAD); | |
1450 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1451 if (catch_type_index != 0) { | |
1452 // We know that this index refers to a subclass of Throwable | |
1453 VerificationType catch_type = cp_index_to_type( | |
1454 catch_type_index, cp, CHECK_VERIFY(this)); | |
1455 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1456 } else { | |
1457 VerificationType throwable = | |
1458 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1459 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1460 } | |
1461 bool match = stackmap_table->match_stackmap( | |
1462 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1463 if (!match) { | |
1464 verify_error(bci, | |
1465 "Stack map does not match the one at exception handler %d", | |
1466 handler_pc); | |
1467 return; | |
1468 } | |
1469 } | |
1470 } | |
1471 } | |
1472 } | |
1473 | |
1474 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1475 int nconstants = cp->length(); | |
1476 if ((index <= 0) || (index >= nconstants)) { | |
1477 verify_error("Illegal constant pool index %d in class %s", | |
1478 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1479 return; | |
1480 } | |
1481 } | |
1482 | |
1483 void ClassVerifier::verify_cp_type( | |
1484 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1485 | |
1486 // In some situations, bytecode rewriting may occur while we're verifying. | |
1487 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1488 // instead. Be sure we don't pick up such indices by accident. |
1489 // We must check was_recursively_verified() before we get here. | |
1490 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1491 |
1492 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1493 unsigned int tag = cp->tag_at(index).value(); | |
1494 if ((types & (1 << tag)) == 0) { | |
1495 verify_error( | |
1496 "Illegal type at constant pool entry %d in class %s", | |
1497 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1498 return; | |
1499 } | |
1500 } | |
1501 | |
1502 void ClassVerifier::verify_cp_class_type( | |
1503 int index, constantPoolHandle cp, TRAPS) { | |
1504 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1505 constantTag tag = cp->tag_at(index); | |
1506 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1507 verify_error("Illegal type at constant pool entry %d in class %s", | |
1508 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1509 return; | |
1510 } | |
1511 } | |
1512 | |
1513 void ClassVerifier::format_error_message( | |
1514 const char* fmt, int offset, va_list va) { | |
1515 ResourceMark rm(_thread); | |
1516 stringStream message(_message, _message_buffer_len); | |
1517 message.vprint(fmt, va); | |
1518 if (!_method.is_null()) { | |
1519 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1520 } | |
1521 if (offset != -1) { | |
1522 message.print(" at offset %d", offset); | |
1523 } | |
1524 } | |
1525 | |
1526 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1527 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1528 va_list va; | |
1529 va_start(va, fmt); | |
1530 format_error_message(fmt, offset, va); | |
1531 va_end(va); | |
1532 } | |
1533 | |
1534 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1535 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1536 va_list va; | |
1537 va_start(va, fmt); | |
1538 format_error_message(fmt, -1, va); | |
1539 va_end(va); | |
1540 } | |
1541 | |
1542 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1543 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1544 va_list va; | |
1545 va_start(va, msg); | |
1546 format_error_message(msg, -1, va); | |
1547 va_end(va); | |
1548 } | |
1549 | |
1550 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
1551 // Get current loader and protection domain first. | |
1552 oop loader = current_class()->class_loader(); | |
1553 oop protection_domain = current_class()->protection_domain(); | |
1554 | |
1555 return SystemDictionary::resolve_or_fail( | |
1556 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1557 true, CHECK_NULL); | |
1558 } | |
1559 | |
1560 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1561 klassOop target_class, | |
1562 symbolOop field_name, | |
1563 symbolOop field_sig, | |
1564 bool is_method) { | |
1565 No_Safepoint_Verifier nosafepoint; | |
1566 | |
1567 // If target class isn't a super class of this class, we don't worry about this case | |
1568 if (!this_class->is_subclass_of(target_class)) { | |
1569 return false; | |
1570 } | |
1571 // Check if the specified method or field is protected | |
1572 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1573 fieldDescriptor fd; | |
1574 if (is_method) { | |
1575 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1576 if (m != NULL && m->is_protected()) { | |
1577 if (!this_class->is_same_class_package(m->method_holder())) { | |
1578 return true; | |
1579 } | |
1580 } | |
1581 } else { | |
1582 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1583 if(member_klass != NULL && fd.is_protected()) { | |
1584 if (!this_class->is_same_class_package(member_klass)) { | |
1585 return true; | |
1586 } | |
1587 } | |
1588 } | |
1589 return false; | |
1590 } | |
1591 | |
1592 void ClassVerifier::verify_ldc( | |
1593 int opcode, u2 index, StackMapFrame *current_frame, | |
1594 constantPoolHandle cp, u2 bci, TRAPS) { | |
1595 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1596 constantTag tag = cp->tag_at(index); | |
1597 unsigned int types; | |
1598 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1599 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1600 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1602 | 1601 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1602 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1603 // Note: The class file parser already verified the legality of | |
1604 // MethodHandle and MethodType constants. | |
0 | 1605 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
1606 } | |
1607 } else { | |
1608 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1609 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1610 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1611 } | |
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1612 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1613 current_frame->push_stack( |
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1614 VerificationType::reference_type( |
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1615 vmSymbols::java_lang_Object()), CHECK_VERIFY(this)); |
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1616 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1617 current_frame->push_stack( |
1618 VerificationType::reference_type( | |
1619 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1620 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1621 current_frame->push_stack( | |
1622 VerificationType::reference_type( | |
1623 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1624 } else if (tag.is_int()) { | |
1625 current_frame->push_stack( | |
1626 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1627 } else if (tag.is_float()) { | |
1628 current_frame->push_stack( | |
1629 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1630 } else if (tag.is_double()) { | |
1631 current_frame->push_stack_2( | |
1632 VerificationType::double_type(), | |
1633 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1634 } else if (tag.is_long()) { | |
1635 current_frame->push_stack_2( | |
1636 VerificationType::long_type(), | |
1637 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 1638 } else if (tag.is_method_handle()) { |
1639 current_frame->push_stack( | |
1640 VerificationType::reference_type( | |
1641 vmSymbols::java_dyn_MethodHandle()), CHECK_VERIFY(this)); | |
1642 } else if (tag.is_method_type()) { | |
1643 current_frame->push_stack( | |
1644 VerificationType::reference_type( | |
1645 vmSymbols::java_dyn_MethodType()), CHECK_VERIFY(this)); | |
0 | 1646 } else { |
1647 verify_error(bci, "Invalid index in ldc"); | |
1648 return; | |
1649 } | |
1650 } | |
1651 | |
1652 void ClassVerifier::verify_switch( | |
1653 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1654 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1655 int bci = bcs->bci(); | |
1656 address bcp = bcs->bcp(); | |
1657 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1658 | |
1659 // 4639449 & 4647081: padding bytes must be 0 | |
1660 u2 padding_offset = 1; | |
1661 while ((bcp + padding_offset) < aligned_bcp) { | |
1662 if(*(bcp + padding_offset) != 0) { | |
1663 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1664 return; | |
1665 } | |
1666 padding_offset++; | |
1667 } | |
1668 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1669 int keys, delta; | |
1670 current_frame->pop_stack( | |
1671 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 1672 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 1673 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
1674 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1675 if (low > high) { | |
1676 verify_error(bci, | |
1677 "low must be less than or equal to high in tableswitch"); | |
1678 return; | |
1679 } | |
1680 keys = high - low + 1; | |
1681 if (keys < 0) { | |
1682 verify_error(bci, "too many keys in tableswitch"); | |
1683 return; | |
1684 } | |
1685 delta = 1; | |
1686 } else { | |
1687 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1688 if (keys < 0) { | |
1689 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1690 return; | |
1691 } | |
1692 delta = 2; | |
1693 // Make sure that the lookupswitch items are sorted | |
1694 for (int i = 0; i < (keys - 1); i++) { | |
1695 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1696 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1697 if (this_key >= next_key) { | |
1698 verify_error(bci, "Bad lookupswitch instruction"); | |
1699 return; | |
1700 } | |
1701 } | |
1702 } | |
1703 int target = bci + default_offset; | |
1704 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1705 for (int i = 0; i < keys; i++) { | |
1706 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1707 stackmap_table->check_jump_target( | |
1708 current_frame, target, CHECK_VERIFY(this)); | |
1709 } | |
1710 } | |
1711 | |
1712 bool ClassVerifier::name_in_supers( | |
1713 symbolOop ref_name, instanceKlassHandle current) { | |
1714 klassOop super = current->super(); | |
1715 while (super != NULL) { | |
1716 if (super->klass_part()->name() == ref_name) { | |
1717 return true; | |
1718 } | |
1719 super = super->klass_part()->super(); | |
1720 } | |
1721 return false; | |
1722 } | |
1723 | |
1724 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1725 StackMapFrame* current_frame, | |
1726 constantPoolHandle cp, | |
1727 TRAPS) { | |
1565 | 1728 u2 index = bcs->get_index_u2(); |
0 | 1729 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); |
1730 | |
1731 // Get field name and signature | |
1732 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
1733 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
1734 | |
1735 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1736 class_format_error( | |
1737 "Invalid signature for field in class %s referenced " | |
1738 "from constant pool index %d", _klass->external_name(), index); | |
1739 return; | |
1740 } | |
1741 | |
1742 // Get referenced class type | |
1743 VerificationType ref_class_type = cp_ref_index_to_type( | |
1744 index, cp, CHECK_VERIFY(this)); | |
1745 if (!ref_class_type.is_object()) { | |
1746 verify_error( | |
1747 "Expecting reference to class in class %s at constant pool index %d", | |
1748 _klass->external_name(), index); | |
1749 return; | |
1750 } | |
1751 VerificationType target_class_type = ref_class_type; | |
1752 | |
1753 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1754 "buffer type must match VerificationType size"); | |
1755 uintptr_t field_type_buffer[2]; | |
1756 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1757 // If we make a VerificationType[2] array directly, the compiler calls | |
1758 // to the c-runtime library to do the allocation instead of just | |
1759 // stack allocating it. Plus it would run constructors. This shows up | |
1760 // in performance profiles. | |
1761 | |
1762 SignatureStream sig_stream(field_sig, false); | |
1763 VerificationType stack_object_type; | |
1764 int n = change_sig_to_verificationType( | |
1765 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1766 u2 bci = bcs->bci(); | |
1767 bool is_assignable; | |
1565 | 1768 switch (bcs->raw_code()) { |
0 | 1769 case Bytecodes::_getstatic: { |
1770 for (int i = 0; i < n; i++) { | |
1771 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1772 } | |
1773 break; | |
1774 } | |
1775 case Bytecodes::_putstatic: { | |
1776 for (int i = n - 1; i >= 0; i--) { | |
1777 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1778 } | |
1779 break; | |
1780 } | |
1781 case Bytecodes::_getfield: { | |
1782 stack_object_type = current_frame->pop_stack( | |
1783 target_class_type, CHECK_VERIFY(this)); | |
1784 for (int i = 0; i < n; i++) { | |
1785 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1786 } | |
1787 goto check_protected; | |
1788 } | |
1789 case Bytecodes::_putfield: { | |
1790 for (int i = n - 1; i >= 0; i--) { | |
1791 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1792 } | |
1793 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1794 | |
1795 // The JVMS 2nd edition allows field initialization before the superclass | |
1796 // initializer, if the field is defined within the current class. | |
1797 fieldDescriptor fd; | |
1798 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1799 target_class_type.equals(current_type()) && | |
1800 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
1801 stack_object_type = current_type(); | |
1802 } | |
1803 is_assignable = target_class_type.is_assignable_from( | |
1804 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1805 if (!is_assignable) { | |
1806 verify_error(bci, "Bad type on operand stack in putfield"); | |
1807 return; | |
1808 } | |
1809 } | |
1810 check_protected: { | |
1811 if (_this_type == stack_object_type) | |
1812 break; // stack_object_type must be assignable to _current_class_type | |
1813 symbolHandle ref_class_name = symbolHandle(THREAD, | |
1814 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
1815 if (!name_in_supers(ref_class_name(), current_class())) | |
1816 // stack_object_type must be assignable to _current_class_type since: | |
1817 // 1. stack_object_type must be assignable to ref_class. | |
1818 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1819 // be a superclass of it. See revised JVMS 5.4.4. | |
1820 break; | |
1821 | |
1822 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
1823 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
1824 field_sig(), false)) { | |
1825 // It's protected access, check if stack object is assignable to | |
1826 // current class. | |
1827 is_assignable = current_type().is_assignable_from( | |
1828 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1829 if (!is_assignable) { | |
1830 verify_error(bci, "Bad access to protected data in getfield"); | |
1831 return; | |
1832 } | |
1833 } | |
1834 break; | |
1835 } | |
1836 default: ShouldNotReachHere(); | |
1837 } | |
1838 } | |
1839 | |
1840 void ClassVerifier::verify_invoke_init( | |
1841 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1842 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1843 constantPoolHandle cp, TRAPS) { | |
1844 u2 bci = bcs->bci(); | |
1845 VerificationType type = current_frame->pop_stack( | |
1846 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1847 if (type == VerificationType::uninitialized_this_type()) { | |
1848 // The method must be an <init> method of either this class, or one of its | |
1849 // superclasses | |
1677 | 1850 if (ref_class_type.name() != current_class()->name() && |
1851 !name_in_supers(ref_class_type.name(), current_class())) { | |
0 | 1852 verify_error(bci, "Bad <init> method call"); |
1853 return; | |
1854 } | |
1855 current_frame->initialize_object(type, current_type()); | |
1856 *this_uninit = true; | |
1857 } else if (type.is_uninitialized()) { | |
1858 u2 new_offset = type.bci(); | |
1859 address new_bcp = bcs->bcp() - bci + new_offset; | |
1860 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1861 verify_error(new_offset, "Expecting new instruction"); | |
1862 return; | |
1863 } | |
1864 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1865 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1866 | |
1867 // The method must be an <init> method of the indicated class | |
1868 VerificationType new_class_type = cp_index_to_type( | |
1869 new_class_index, cp, CHECK_VERIFY(this)); | |
1870 if (!new_class_type.equals(ref_class_type)) { | |
1871 verify_error(bci, "Call to wrong <init> method"); | |
1872 return; | |
1873 } | |
1874 // According to the VM spec, if the referent class is a superclass of the | |
1875 // current class, and is in a different runtime package, and the method is | |
1876 // protected, then the objectref must be the current class or a subclass | |
1877 // of the current class. | |
1878 VerificationType objectref_type = new_class_type; | |
1879 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1880 klassOop ref_klass = load_class( | |
1881 ref_class_type.name(), CHECK_VERIFY(this)); | |
1882 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1883 vmSymbols::object_initializer_name(), | |
1565 | 1884 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 1885 instanceKlassHandle mh(THREAD, m->method_holder()); |
1886 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1887 bool assignable = current_type().is_assignable_from( | |
1888 objectref_type, current_class(), CHECK_VERIFY(this)); | |
1889 if (!assignable) { | |
1890 verify_error(bci, "Bad access to protected <init> method"); | |
1891 return; | |
1892 } | |
1893 } | |
1894 } | |
1895 current_frame->initialize_object(type, new_class_type); | |
1896 } else { | |
1897 verify_error(bci, "Bad operand type when invoking <init>"); | |
1898 return; | |
1899 } | |
1900 } | |
1901 | |
1902 void ClassVerifier::verify_invoke_instructions( | |
1903 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1904 bool *this_uninit, VerificationType return_type, | |
1905 constantPoolHandle cp, TRAPS) { | |
1906 // Make sure the constant pool item is the right type | |
1565 | 1907 u2 index = bcs->get_index_u2(); |
1908 Bytecodes::Code opcode = bcs->raw_code(); | |
0 | 1909 unsigned int types = (opcode == Bytecodes::_invokeinterface |
1910 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1911 : opcode == Bytecodes::_invokedynamic |
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1912 ? (1 << JVM_CONSTANT_NameAndType |
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1913 |1 << JVM_CONSTANT_InvokeDynamic) |
0 | 1914 : 1 << JVM_CONSTANT_Methodref); |
1915 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1916 | |
1917 // Get method name and signature | |
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1918 symbolHandle method_name(THREAD, cp->name_ref_at(index)); |
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1919 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); |
0 | 1920 |
1921 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1922 class_format_error( | |
1923 "Invalid method signature in class %s referenced " | |
1924 "from constant pool index %d", _klass->external_name(), index); | |
1925 return; | |
1926 } | |
1927 | |
1928 // Get referenced class type | |
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1929 VerificationType ref_class_type; |
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1930 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 1931 if (!EnableInvokeDynamic || |
1932 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
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1933 class_format_error( |
1602 | 1934 (!EnableInvokeDynamic ? |
1935 "invokedynamic instructions not enabled in this JVM" : | |
1936 "invokedynamic instructions not supported by this class file version"), | |
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1937 _klass->external_name()); |
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1938 return; |
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1939 } |
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1940 } else { |
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1941 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1942 } |
0 | 1943 |
1944 // For a small signature length, we just allocate 128 bytes instead | |
1945 // of parsing the signature once to find its size. | |
1946 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1947 // longs/doubles to be consertive. | |
1948 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1949 "buffer type must match VerificationType size"); | |
1950 uintptr_t on_stack_sig_types_buffer[128]; | |
1951 // If we make a VerificationType[128] array directly, the compiler calls | |
1952 // to the c-runtime library to do the allocation instead of just | |
1953 // stack allocating it. Plus it would run constructors. This shows up | |
1954 // in performance profiles. | |
1955 | |
1956 VerificationType* sig_types; | |
1957 int size = (method_sig->utf8_length() - 3) * 2; | |
1958 if (size > 128) { | |
1959 // Long and double occupies two slots here. | |
1960 ArgumentSizeComputer size_it(method_sig); | |
1961 size = size_it.size(); | |
1962 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1963 } else{ | |
1964 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1965 } | |
1966 SignatureStream sig_stream(method_sig); | |
1967 int sig_i = 0; | |
1968 while (!sig_stream.at_return_type()) { | |
1969 sig_i += change_sig_to_verificationType( | |
1970 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
1971 sig_stream.next(); | |
1972 } | |
1973 int nargs = sig_i; | |
1974 | |
1975 #ifdef ASSERT | |
1976 { | |
1977 ArgumentSizeComputer size_it(method_sig); | |
1978 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
1979 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
1980 } | |
1981 #endif | |
1982 | |
1983 // Check instruction operands | |
1984 u2 bci = bcs->bci(); | |
1985 if (opcode == Bytecodes::_invokeinterface) { | |
1986 address bcp = bcs->bcp(); | |
1987 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
1988 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
1989 // the difference between the size of the operand stack before and after the instruction | |
1990 // executes. | |
1991 if (*(bcp+3) != (nargs+1)) { | |
1992 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
1993 return; | |
1994 } | |
1995 if (*(bcp+4) != 0) { | |
1996 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
1997 return; | |
1998 } | |
1999 } | |
2000 | |
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2001 if (opcode == Bytecodes::_invokedynamic) { |
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2002 address bcp = bcs->bcp(); |
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2003 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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2004 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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2005 return; |
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2006 } |
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2007 } |
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2008 |
0 | 2009 if (method_name->byte_at(0) == '<') { |
2010 // Make sure <init> can only be invoked by invokespecial | |
2011 if (opcode != Bytecodes::_invokespecial || | |
2012 method_name() != vmSymbols::object_initializer_name()) { | |
2013 verify_error(bci, "Illegal call to internal method"); | |
2014 return; | |
2015 } | |
2016 } else if (opcode == Bytecodes::_invokespecial | |
2017 && !ref_class_type.equals(current_type()) | |
2018 && !ref_class_type.equals(VerificationType::reference_type( | |
2019 current_class()->super()->klass_part()->name()))) { | |
2020 bool subtype = ref_class_type.is_assignable_from( | |
2021 current_type(), current_class(), CHECK_VERIFY(this)); | |
2022 if (!subtype) { | |
2023 verify_error(bci, "Bad invokespecial instruction: " | |
2024 "current class isn't assignable to reference class."); | |
2025 return; | |
2026 } | |
2027 } | |
2028 // Match method descriptor with operand stack | |
2029 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2030 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2031 } | |
2032 // Check objectref on operand stack | |
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2033 if (opcode != Bytecodes::_invokestatic && |
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2034 opcode != Bytecodes::_invokedynamic) { |
0 | 2035 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
2036 verify_invoke_init(bcs, ref_class_type, current_frame, | |
2037 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2038 } else { // other methods | |
2039 // Ensures that target class is assignable to method class. | |
2040 if (opcode == Bytecodes::_invokespecial) { | |
2041 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2042 } else if (opcode == Bytecodes::_invokevirtual) { | |
2043 VerificationType stack_object_type = | |
2044 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2045 if (current_type() != stack_object_type) { | |
2046 assert(cp->cache() == NULL, "not rewritten yet"); | |
2047 symbolHandle ref_class_name = symbolHandle(THREAD, | |
2048 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
2049 // See the comments in verify_field_instructions() for | |
2050 // the rationale behind this. | |
2051 if (name_in_supers(ref_class_name(), current_class())) { | |
2052 klassOop ref_class = load_class(ref_class_name, CHECK); | |
2053 if (is_protected_access( | |
2054 _klass, ref_class, method_name(), method_sig(), true)) { | |
2055 // It's protected access, check if stack object is | |
2056 // assignable to current class. | |
2057 bool is_assignable = current_type().is_assignable_from( | |
2058 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
2059 if (!is_assignable) { | |
2060 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2061 && stack_object_type.is_array() | |
2062 && method_name() == vmSymbols::clone_name()) { | |
2063 // Special case: arrays pretend to implement public Object | |
2064 // clone(). | |
2065 } else { | |
2066 verify_error(bci, | |
2067 "Bad access to protected data in invokevirtual"); | |
2068 return; | |
2069 } | |
2070 } | |
2071 } | |
2072 } | |
2073 } | |
2074 } else { | |
2075 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2076 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2077 } | |
2078 } | |
2079 } | |
2080 // Push the result type. | |
2081 if (sig_stream.type() != T_VOID) { | |
2082 if (method_name() == vmSymbols::object_initializer_name()) { | |
2083 // <init> method must have a void return type | |
2084 verify_error(bci, "Return type must be void in <init> method"); | |
2085 return; | |
2086 } | |
2087 VerificationType return_type[2]; | |
2088 int n = change_sig_to_verificationType( | |
2089 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2090 for (int i = 0; i < n; i++) { | |
2091 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2092 } | |
2093 } | |
2094 } | |
2095 | |
2096 VerificationType ClassVerifier::get_newarray_type( | |
2097 u2 index, u2 bci, TRAPS) { | |
2098 const char* from_bt[] = { | |
2099 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2100 }; | |
2101 if (index < T_BOOLEAN || index > T_LONG) { | |
2102 verify_error(bci, "Illegal newarray instruction"); | |
2103 return VerificationType::bogus_type(); | |
2104 } | |
2105 | |
2106 // from_bt[index] contains the array signature which has a length of 2 | |
2107 symbolHandle sig = oopFactory::new_symbol_handle( | |
2108 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
2109 return VerificationType::reference_type(sig); | |
2110 } | |
2111 | |
2112 void ClassVerifier::verify_anewarray( | |
2113 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2114 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2115 current_frame->pop_stack( | |
2116 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2117 | |
2118 VerificationType component_type = | |
2119 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2120 ResourceMark rm(THREAD); | |
2121 int length; | |
2122 char* arr_sig_str; | |
2123 if (component_type.is_array()) { // it's an array | |
2124 const char* component_name = component_type.name()->as_utf8(); | |
2125 // add one dimension to component | |
2126 length = (int)strlen(component_name) + 1; | |
2127 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2128 arr_sig_str[0] = '['; | |
2129 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2130 } else { // it's an object or interface | |
2131 const char* component_name = component_type.name()->as_utf8(); | |
2132 // add one dimension to component with 'L' prepended and ';' postpended. | |
2133 length = (int)strlen(component_name) + 3; | |
2134 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2135 arr_sig_str[0] = '['; | |
2136 arr_sig_str[1] = 'L'; | |
2137 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2138 arr_sig_str[length - 1] = ';'; | |
2139 } | |
2140 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
2141 arr_sig_str, length, CHECK_VERIFY(this)); | |
2142 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2143 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2144 } | |
2145 | |
2146 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2147 current_frame->get_local( | |
2148 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2149 current_frame->push_stack( | |
2150 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2151 } | |
2152 | |
2153 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2154 current_frame->get_local_2( | |
2155 index, VerificationType::long_type(), | |
2156 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2157 current_frame->push_stack_2( | |
2158 VerificationType::long_type(), | |
2159 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2160 } | |
2161 | |
2162 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2163 current_frame->get_local( | |
2164 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2165 current_frame->push_stack( | |
2166 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2167 } | |
2168 | |
2169 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2170 current_frame->get_local_2( | |
2171 index, VerificationType::double_type(), | |
2172 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2173 current_frame->push_stack_2( | |
2174 VerificationType::double_type(), | |
2175 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2176 } | |
2177 | |
2178 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2179 VerificationType type = current_frame->get_local( | |
2180 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2181 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2182 } | |
2183 | |
2184 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2185 current_frame->pop_stack( | |
2186 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2187 current_frame->set_local( | |
2188 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2189 } | |
2190 | |
2191 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2192 current_frame->pop_stack_2( | |
2193 VerificationType::long2_type(), | |
2194 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2195 current_frame->set_local_2( | |
2196 index, VerificationType::long_type(), | |
2197 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2198 } | |
2199 | |
2200 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2201 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2202 current_frame->set_local( | |
2203 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2204 } | |
2205 | |
2206 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2207 current_frame->pop_stack_2( | |
2208 VerificationType::double2_type(), | |
2209 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2210 current_frame->set_local_2( | |
2211 index, VerificationType::double_type(), | |
2212 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2213 } | |
2214 | |
2215 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2216 VerificationType type = current_frame->pop_stack( | |
2217 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2218 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2219 } | |
2220 | |
2221 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2222 VerificationType type = current_frame->get_local( | |
2223 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2224 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2225 } | |
2226 | |
2227 void ClassVerifier::verify_return_value( | |
2228 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2229 if (return_type == VerificationType::bogus_type()) { | |
2230 verify_error(bci, "Method expects a return value"); | |
2231 return; | |
2232 } | |
2233 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
2234 if (!match) { | |
2235 verify_error(bci, "Bad return type"); | |
2236 return; | |
2237 } | |
2238 } |