Mercurial > hg > truffle
comparison src/share/vm/classfile/verifier.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 8a79f7ec8f5d |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_verifier.cpp.incl" | |
27 | |
28 // Access to external entry for VerifyClassCodes - old byte code verifier | |
29 | |
30 extern "C" { | |
31 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
32 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
33 } | |
34 | |
35 static void* volatile _verify_byte_codes_fn = NULL; | |
36 | |
37 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
38 | |
39 static void* verify_byte_codes_fn() { | |
40 if (_verify_byte_codes_fn == NULL) { | |
41 void *lib_handle = os::native_java_library(); | |
42 void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); | |
43 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
44 if (func == NULL) { | |
45 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
46 func = hpi::dll_lookup(lib_handle, "VerifyClassCodes"); | |
47 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
48 } | |
49 } | |
50 return (void*)_verify_byte_codes_fn; | |
51 } | |
52 | |
53 | |
54 // Methods in Verifier | |
55 | |
56 bool Verifier::should_verify_for(oop class_loader) { | |
57 return class_loader == NULL ? | |
58 BytecodeVerificationLocal : BytecodeVerificationRemote; | |
59 } | |
60 | |
61 bool Verifier::relax_verify_for(oop loader) { | |
62 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
63 bool need_verify = | |
64 // verifyAll | |
65 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
66 // verifyRemote | |
67 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
68 return !need_verify; | |
69 } | |
70 | |
71 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, TRAPS) { | |
72 ResourceMark rm(THREAD); | |
73 HandleMark hm; | |
74 | |
75 symbolHandle exception_name; | |
76 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; | |
77 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
78 | |
79 const char* klassName = klass->external_name(); | |
80 | |
81 // If the class should be verified, first see if we can use the split | |
82 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
83 // is set, then call the inference verifier. | |
84 if (is_eligible_for_verification(klass)) { | |
85 if (TraceClassInitialization) { | |
86 tty->print_cr("Start class verification for: %s", klassName); | |
87 } | |
88 if (UseSplitVerifier && | |
89 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
90 ClassVerifier split_verifier( | |
91 klass, message_buffer, message_buffer_len, THREAD); | |
92 split_verifier.verify_class(THREAD); | |
93 exception_name = split_verifier.result(); | |
94 if (FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && | |
95 (exception_name == vmSymbols::java_lang_VerifyError() || | |
96 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
97 if (TraceClassInitialization) { | |
98 tty->print_cr( | |
99 "Fail over class verification to old verifier for: %s", klassName); | |
100 } | |
101 exception_name = inference_verify( | |
102 klass, message_buffer, message_buffer_len, THREAD); | |
103 } | |
104 } else { | |
105 exception_name = inference_verify( | |
106 klass, message_buffer, message_buffer_len, THREAD); | |
107 } | |
108 | |
109 if (TraceClassInitialization) { | |
110 if (HAS_PENDING_EXCEPTION) { | |
111 tty->print("Verification for %s has", klassName); | |
112 tty->print_cr(" exception pending %s ", | |
113 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
114 } else if (!exception_name.is_null()) { | |
115 tty->print_cr("Verification for %s failed", klassName); | |
116 } | |
117 tty->print_cr("End class verification for: %s", klassName); | |
118 } | |
119 } | |
120 | |
121 if (HAS_PENDING_EXCEPTION) { | |
122 return false; // use the existing exception | |
123 } else if (exception_name.is_null()) { | |
124 return true; // verifcation succeeded | |
125 } else { // VerifyError or ClassFormatError to be created and thrown | |
126 ResourceMark rm(THREAD); | |
127 instanceKlassHandle kls = | |
128 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
129 while (!kls.is_null()) { | |
130 if (kls == klass) { | |
131 // If the class being verified is the exception we're creating | |
132 // or one of it's superclasses, we're in trouble and are going | |
133 // to infinitely recurse when we try to initialize the exception. | |
134 // So bail out here by throwing the preallocated VM error. | |
135 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
136 } | |
137 kls = kls->super(); | |
138 } | |
139 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
140 THROW_MSG_(exception_name, message_buffer, false); | |
141 } | |
142 } | |
143 | |
144 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass) { | |
145 symbolOop name = klass->name(); | |
146 klassOop refl_magic_klass = SystemDictionary::reflect_magic_klass(); | |
147 | |
148 return (should_verify_for(klass->class_loader()) && | |
149 // return if the class is a bootstrapping class | |
150 // We need to skip the following four for bootstraping | |
151 name != vmSymbols::java_lang_Object() && | |
152 name != vmSymbols::java_lang_Class() && | |
153 name != vmSymbols::java_lang_String() && | |
154 name != vmSymbols::java_lang_Throwable() && | |
155 | |
156 // Can not verify the bytecodes for shared classes because they have | |
157 // already been rewritten to contain constant pool cache indices, | |
158 // which the verifier can't understand. | |
159 // Shared classes shouldn't have stackmaps either. | |
160 !klass()->is_shared() && | |
161 | |
162 // As of the fix for 4486457 we disable verification for all of the | |
163 // dynamically-generated bytecodes associated with the 1.4 | |
164 // reflection implementation, not just those associated with | |
165 // sun/reflect/SerializationConstructorAccessor. | |
166 // NOTE: this is called too early in the bootstrapping process to be | |
167 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
168 (refl_magic_klass == NULL || | |
169 !klass->is_subtype_of(refl_magic_klass) || | |
170 VerifyReflectionBytecodes) | |
171 ); | |
172 } | |
173 | |
174 symbolHandle Verifier::inference_verify( | |
175 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { | |
176 JavaThread* thread = (JavaThread*)THREAD; | |
177 JNIEnv *env = thread->jni_environment(); | |
178 | |
179 void* verify_func = verify_byte_codes_fn(); | |
180 | |
181 if (verify_func == NULL) { | |
182 jio_snprintf(message, message_len, "Could not link verifier"); | |
183 return vmSymbols::java_lang_VerifyError(); | |
184 } | |
185 | |
186 ResourceMark rm(THREAD); | |
187 if (ClassVerifier::_verify_verbose) { | |
188 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
189 } | |
190 | |
191 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
192 jint result; | |
193 | |
194 { | |
195 HandleMark hm(thread); | |
196 ThreadToNativeFromVM ttn(thread); | |
197 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
198 // code knows that we have left the VM | |
199 | |
200 if (_is_new_verify_byte_codes_fn) { | |
201 verify_byte_codes_fn_new_t func = | |
202 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
203 result = (*func)(env, cls, message, (int)message_len, | |
204 klass->major_version()); | |
205 } else { | |
206 verify_byte_codes_fn_t func = | |
207 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
208 result = (*func)(env, cls, message, (int)message_len); | |
209 } | |
210 } | |
211 | |
212 JNIHandles::destroy_local(cls); | |
213 | |
214 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
215 // to be changed (still return jboolean (unsigned char)), and result is | |
216 // 1 when verification is passed. | |
217 symbolHandle nh(NULL); | |
218 if (result == 0) { | |
219 return vmSymbols::java_lang_VerifyError(); | |
220 } else if (result == 1) { | |
221 return nh; // verified. | |
222 } else if (result == 2) { | |
223 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); | |
224 } else if (result == 3) { | |
225 return vmSymbols::java_lang_ClassFormatError(); | |
226 } else { | |
227 ShouldNotReachHere(); | |
228 return nh; | |
229 } | |
230 } | |
231 | |
232 // Methods in ClassVerifier | |
233 | |
234 bool ClassVerifier::_verify_verbose = false; | |
235 | |
236 ClassVerifier::ClassVerifier( | |
237 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
238 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), | |
239 _message_buffer_len(msg_len), _klass(klass) { | |
240 _this_type = VerificationType::reference_type(klass->name()); | |
241 } | |
242 | |
243 ClassVerifier::~ClassVerifier() { | |
244 } | |
245 | |
246 void ClassVerifier::verify_class(TRAPS) { | |
247 if (_verify_verbose) { | |
248 tty->print_cr("Verifying class %s with new format", | |
249 _klass->external_name()); | |
250 } | |
251 | |
252 objArrayHandle methods(THREAD, _klass->methods()); | |
253 int num_methods = methods->length(); | |
254 | |
255 for (int index = 0; index < num_methods; index++) { | |
256 methodOop m = (methodOop)methods->obj_at(index); | |
257 if (m->is_native() || m->is_abstract()) { | |
258 // If m is native or abstract, skip it. It is checked in class file | |
259 // parser that methods do not override a final method. | |
260 continue; | |
261 } | |
262 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
263 } | |
264 } | |
265 | |
266 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
267 ResourceMark rm(THREAD); | |
268 _method = m; // initialize _method | |
269 if (_verify_verbose) { | |
270 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
271 } | |
272 | |
273 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
274 | |
275 int32_t max_stack = m->max_stack(); | |
276 int32_t max_locals = m->max_locals(); | |
277 constantPoolHandle cp(THREAD, m->constants()); | |
278 | |
279 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
280 class_format_error("Invalid method signature"); | |
281 return; | |
282 } | |
283 | |
284 // Initial stack map frame: offset is 0, stack is initially empty. | |
285 StackMapFrame current_frame(max_locals, max_stack, this); | |
286 // Set initial locals | |
287 VerificationType return_type = current_frame.set_locals_from_arg( | |
288 m, current_type(), CHECK_VERIFY(this)); | |
289 | |
290 int32_t stackmap_index = 0; // index to the stackmap array | |
291 | |
292 u4 code_length = m->code_size(); | |
293 | |
294 // Scan the bytecode and map each instruction's start offset to a number. | |
295 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
296 | |
297 int ex_min = code_length; | |
298 int ex_max = -1; | |
299 // Look through each item on the exception table. Each of the fields must refer | |
300 // to a legal instruction. | |
301 verify_exception_handler_table( | |
302 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
303 | |
304 // Look through each entry on the local variable table and make sure | |
305 // its range of code array offsets is valid. (4169817) | |
306 if (m->has_localvariable_table()) { | |
307 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
308 } | |
309 | |
310 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
311 StackMapStream stream(stackmap_data); | |
312 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
313 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
314 code_data, code_length, CHECK_VERIFY(this)); | |
315 | |
316 if (_verify_verbose) { | |
317 stackmap_table.print(); | |
318 } | |
319 | |
320 RawBytecodeStream bcs(m); | |
321 | |
322 // Scan the byte code linearly from the start to the end | |
323 bool no_control_flow = false; // Set to true when there is no direct control | |
324 // flow from current instruction to the next | |
325 // instruction in sequence | |
326 Bytecodes::Code opcode; | |
327 while (!bcs.is_last_bytecode()) { | |
328 opcode = bcs.raw_next(); | |
329 u2 bci = bcs.bci(); | |
330 | |
331 // Set current frame's offset to bci | |
332 current_frame.set_offset(bci); | |
333 | |
334 // Make sure every offset in stackmap table point to the beginning to | |
335 // an instruction. Match current_frame to stackmap_table entry with | |
336 // the same offset if exists. | |
337 stackmap_index = verify_stackmap_table( | |
338 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
339 no_control_flow, CHECK_VERIFY(this)); | |
340 | |
341 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
342 | |
343 // Merge with the next instruction | |
344 { | |
345 u2 index; | |
346 int target; | |
347 VerificationType type, type2; | |
348 VerificationType atype; | |
349 | |
350 #ifndef PRODUCT | |
351 if (_verify_verbose) { | |
352 current_frame.print(); | |
353 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
354 } | |
355 #endif | |
356 | |
357 // Make sure wide instruction is in correct format | |
358 if (bcs.is_wide()) { | |
359 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
360 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
361 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
362 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
363 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
364 opcode != Bytecodes::_dstore) { | |
365 verify_error(bci, "Bad wide instruction"); | |
366 return; | |
367 } | |
368 } | |
369 | |
370 switch (opcode) { | |
371 case Bytecodes::_nop : | |
372 no_control_flow = false; break; | |
373 case Bytecodes::_aconst_null : | |
374 current_frame.push_stack( | |
375 VerificationType::null_type(), CHECK_VERIFY(this)); | |
376 no_control_flow = false; break; | |
377 case Bytecodes::_iconst_m1 : | |
378 case Bytecodes::_iconst_0 : | |
379 case Bytecodes::_iconst_1 : | |
380 case Bytecodes::_iconst_2 : | |
381 case Bytecodes::_iconst_3 : | |
382 case Bytecodes::_iconst_4 : | |
383 case Bytecodes::_iconst_5 : | |
384 current_frame.push_stack( | |
385 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
386 no_control_flow = false; break; | |
387 case Bytecodes::_lconst_0 : | |
388 case Bytecodes::_lconst_1 : | |
389 current_frame.push_stack_2( | |
390 VerificationType::long_type(), | |
391 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
392 no_control_flow = false; break; | |
393 case Bytecodes::_fconst_0 : | |
394 case Bytecodes::_fconst_1 : | |
395 case Bytecodes::_fconst_2 : | |
396 current_frame.push_stack( | |
397 VerificationType::float_type(), CHECK_VERIFY(this)); | |
398 no_control_flow = false; break; | |
399 case Bytecodes::_dconst_0 : | |
400 case Bytecodes::_dconst_1 : | |
401 current_frame.push_stack_2( | |
402 VerificationType::double_type(), | |
403 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
404 no_control_flow = false; break; | |
405 case Bytecodes::_sipush : | |
406 case Bytecodes::_bipush : | |
407 current_frame.push_stack( | |
408 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
409 no_control_flow = false; break; | |
410 case Bytecodes::_ldc : | |
411 verify_ldc( | |
412 opcode, bcs.get_index(), ¤t_frame, | |
413 cp, bci, CHECK_VERIFY(this)); | |
414 no_control_flow = false; break; | |
415 case Bytecodes::_ldc_w : | |
416 case Bytecodes::_ldc2_w : | |
417 verify_ldc( | |
418 opcode, bcs.get_index_big(), ¤t_frame, | |
419 cp, bci, CHECK_VERIFY(this)); | |
420 no_control_flow = false; break; | |
421 case Bytecodes::_iload : | |
422 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
423 no_control_flow = false; break; | |
424 case Bytecodes::_iload_0 : | |
425 case Bytecodes::_iload_1 : | |
426 case Bytecodes::_iload_2 : | |
427 case Bytecodes::_iload_3 : | |
428 index = opcode - Bytecodes::_iload_0; | |
429 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
430 no_control_flow = false; break; | |
431 case Bytecodes::_lload : | |
432 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
433 no_control_flow = false; break; | |
434 case Bytecodes::_lload_0 : | |
435 case Bytecodes::_lload_1 : | |
436 case Bytecodes::_lload_2 : | |
437 case Bytecodes::_lload_3 : | |
438 index = opcode - Bytecodes::_lload_0; | |
439 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
440 no_control_flow = false; break; | |
441 case Bytecodes::_fload : | |
442 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
443 no_control_flow = false; break; | |
444 case Bytecodes::_fload_0 : | |
445 case Bytecodes::_fload_1 : | |
446 case Bytecodes::_fload_2 : | |
447 case Bytecodes::_fload_3 : | |
448 index = opcode - Bytecodes::_fload_0; | |
449 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
450 no_control_flow = false; break; | |
451 case Bytecodes::_dload : | |
452 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
453 no_control_flow = false; break; | |
454 case Bytecodes::_dload_0 : | |
455 case Bytecodes::_dload_1 : | |
456 case Bytecodes::_dload_2 : | |
457 case Bytecodes::_dload_3 : | |
458 index = opcode - Bytecodes::_dload_0; | |
459 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
460 no_control_flow = false; break; | |
461 case Bytecodes::_aload : | |
462 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
463 no_control_flow = false; break; | |
464 case Bytecodes::_aload_0 : | |
465 case Bytecodes::_aload_1 : | |
466 case Bytecodes::_aload_2 : | |
467 case Bytecodes::_aload_3 : | |
468 index = opcode - Bytecodes::_aload_0; | |
469 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
470 no_control_flow = false; break; | |
471 case Bytecodes::_iaload : | |
472 type = current_frame.pop_stack( | |
473 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
474 atype = current_frame.pop_stack( | |
475 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
476 if (!atype.is_int_array()) { | |
477 verify_error(bci, bad_type_msg, "iaload"); | |
478 return; | |
479 } | |
480 current_frame.push_stack( | |
481 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
482 no_control_flow = false; break; | |
483 case Bytecodes::_baload : | |
484 type = current_frame.pop_stack( | |
485 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
486 atype = current_frame.pop_stack( | |
487 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
488 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
489 verify_error(bci, bad_type_msg, "baload"); | |
490 return; | |
491 } | |
492 current_frame.push_stack( | |
493 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
494 no_control_flow = false; break; | |
495 case Bytecodes::_caload : | |
496 type = current_frame.pop_stack( | |
497 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
498 atype = current_frame.pop_stack( | |
499 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
500 if (!atype.is_char_array()) { | |
501 verify_error(bci, bad_type_msg, "caload"); | |
502 return; | |
503 } | |
504 current_frame.push_stack( | |
505 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
506 no_control_flow = false; break; | |
507 case Bytecodes::_saload : | |
508 type = current_frame.pop_stack( | |
509 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
510 atype = current_frame.pop_stack( | |
511 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
512 if (!atype.is_short_array()) { | |
513 verify_error(bci, bad_type_msg, "saload"); | |
514 return; | |
515 } | |
516 current_frame.push_stack( | |
517 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
518 no_control_flow = false; break; | |
519 case Bytecodes::_laload : | |
520 type = current_frame.pop_stack( | |
521 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
522 atype = current_frame.pop_stack( | |
523 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
524 if (!atype.is_long_array()) { | |
525 verify_error(bci, bad_type_msg, "laload"); | |
526 return; | |
527 } | |
528 current_frame.push_stack_2( | |
529 VerificationType::long_type(), | |
530 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
531 no_control_flow = false; break; | |
532 case Bytecodes::_faload : | |
533 type = current_frame.pop_stack( | |
534 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
535 atype = current_frame.pop_stack( | |
536 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
537 if (!atype.is_float_array()) { | |
538 verify_error(bci, bad_type_msg, "faload"); | |
539 return; | |
540 } | |
541 current_frame.push_stack( | |
542 VerificationType::float_type(), CHECK_VERIFY(this)); | |
543 no_control_flow = false; break; | |
544 case Bytecodes::_daload : | |
545 type = current_frame.pop_stack( | |
546 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
547 atype = current_frame.pop_stack( | |
548 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
549 if (!atype.is_double_array()) { | |
550 verify_error(bci, bad_type_msg, "daload"); | |
551 return; | |
552 } | |
553 current_frame.push_stack_2( | |
554 VerificationType::double_type(), | |
555 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
556 no_control_flow = false; break; | |
557 case Bytecodes::_aaload : { | |
558 type = current_frame.pop_stack( | |
559 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
560 atype = current_frame.pop_stack( | |
561 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
562 if (!atype.is_reference_array()) { | |
563 verify_error(bci, bad_type_msg, "aaload"); | |
564 return; | |
565 } | |
566 if (atype.is_null()) { | |
567 current_frame.push_stack( | |
568 VerificationType::null_type(), CHECK_VERIFY(this)); | |
569 } else { | |
570 VerificationType component = | |
571 atype.get_component(CHECK_VERIFY(this)); | |
572 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
573 } | |
574 no_control_flow = false; break; | |
575 } | |
576 case Bytecodes::_istore : | |
577 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
578 no_control_flow = false; break; | |
579 case Bytecodes::_istore_0 : | |
580 case Bytecodes::_istore_1 : | |
581 case Bytecodes::_istore_2 : | |
582 case Bytecodes::_istore_3 : | |
583 index = opcode - Bytecodes::_istore_0; | |
584 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
585 no_control_flow = false; break; | |
586 case Bytecodes::_lstore : | |
587 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
588 no_control_flow = false; break; | |
589 case Bytecodes::_lstore_0 : | |
590 case Bytecodes::_lstore_1 : | |
591 case Bytecodes::_lstore_2 : | |
592 case Bytecodes::_lstore_3 : | |
593 index = opcode - Bytecodes::_lstore_0; | |
594 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
595 no_control_flow = false; break; | |
596 case Bytecodes::_fstore : | |
597 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
598 no_control_flow = false; break; | |
599 case Bytecodes::_fstore_0 : | |
600 case Bytecodes::_fstore_1 : | |
601 case Bytecodes::_fstore_2 : | |
602 case Bytecodes::_fstore_3 : | |
603 index = opcode - Bytecodes::_fstore_0; | |
604 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
605 no_control_flow = false; break; | |
606 case Bytecodes::_dstore : | |
607 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
608 no_control_flow = false; break; | |
609 case Bytecodes::_dstore_0 : | |
610 case Bytecodes::_dstore_1 : | |
611 case Bytecodes::_dstore_2 : | |
612 case Bytecodes::_dstore_3 : | |
613 index = opcode - Bytecodes::_dstore_0; | |
614 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
615 no_control_flow = false; break; | |
616 case Bytecodes::_astore : | |
617 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
618 no_control_flow = false; break; | |
619 case Bytecodes::_astore_0 : | |
620 case Bytecodes::_astore_1 : | |
621 case Bytecodes::_astore_2 : | |
622 case Bytecodes::_astore_3 : | |
623 index = opcode - Bytecodes::_astore_0; | |
624 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
625 no_control_flow = false; break; | |
626 case Bytecodes::_iastore : | |
627 type = current_frame.pop_stack( | |
628 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
629 type2 = current_frame.pop_stack( | |
630 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
631 atype = current_frame.pop_stack( | |
632 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
633 if (!atype.is_int_array()) { | |
634 verify_error(bci, bad_type_msg, "iastore"); | |
635 return; | |
636 } | |
637 no_control_flow = false; break; | |
638 case Bytecodes::_bastore : | |
639 type = current_frame.pop_stack( | |
640 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
641 type2 = current_frame.pop_stack( | |
642 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
643 atype = current_frame.pop_stack( | |
644 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
645 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
646 verify_error(bci, bad_type_msg, "bastore"); | |
647 return; | |
648 } | |
649 no_control_flow = false; break; | |
650 case Bytecodes::_castore : | |
651 current_frame.pop_stack( | |
652 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
653 current_frame.pop_stack( | |
654 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
655 atype = current_frame.pop_stack( | |
656 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
657 if (!atype.is_char_array()) { | |
658 verify_error(bci, bad_type_msg, "castore"); | |
659 return; | |
660 } | |
661 no_control_flow = false; break; | |
662 case Bytecodes::_sastore : | |
663 current_frame.pop_stack( | |
664 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
665 current_frame.pop_stack( | |
666 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
667 atype = current_frame.pop_stack( | |
668 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
669 if (!atype.is_short_array()) { | |
670 verify_error(bci, bad_type_msg, "sastore"); | |
671 return; | |
672 } | |
673 no_control_flow = false; break; | |
674 case Bytecodes::_lastore : | |
675 current_frame.pop_stack_2( | |
676 VerificationType::long2_type(), | |
677 VerificationType::long_type(), CHECK_VERIFY(this)); | |
678 current_frame.pop_stack( | |
679 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
680 atype = current_frame.pop_stack( | |
681 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
682 if (!atype.is_long_array()) { | |
683 verify_error(bci, bad_type_msg, "lastore"); | |
684 return; | |
685 } | |
686 no_control_flow = false; break; | |
687 case Bytecodes::_fastore : | |
688 current_frame.pop_stack( | |
689 VerificationType::float_type(), CHECK_VERIFY(this)); | |
690 current_frame.pop_stack | |
691 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
692 atype = current_frame.pop_stack( | |
693 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
694 if (!atype.is_float_array()) { | |
695 verify_error(bci, bad_type_msg, "fastore"); | |
696 return; | |
697 } | |
698 no_control_flow = false; break; | |
699 case Bytecodes::_dastore : | |
700 current_frame.pop_stack_2( | |
701 VerificationType::double2_type(), | |
702 VerificationType::double_type(), CHECK_VERIFY(this)); | |
703 current_frame.pop_stack( | |
704 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
705 atype = current_frame.pop_stack( | |
706 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
707 if (!atype.is_double_array()) { | |
708 verify_error(bci, bad_type_msg, "dastore"); | |
709 return; | |
710 } | |
711 no_control_flow = false; break; | |
712 case Bytecodes::_aastore : | |
713 type = current_frame.pop_stack( | |
714 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
715 type2 = current_frame.pop_stack( | |
716 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
717 atype = current_frame.pop_stack( | |
718 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
719 // more type-checking is done at runtime | |
720 if (!atype.is_reference_array()) { | |
721 verify_error(bci, bad_type_msg, "aastore"); | |
722 return; | |
723 } | |
724 // 4938384: relaxed constraint in JVMS 3nd edition. | |
725 no_control_flow = false; break; | |
726 case Bytecodes::_pop : | |
727 current_frame.pop_stack( | |
728 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
729 no_control_flow = false; break; | |
730 case Bytecodes::_pop2 : | |
731 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
732 if (type.is_category1()) { | |
733 current_frame.pop_stack( | |
734 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
735 } else if (type.is_category2_2nd()) { | |
736 current_frame.pop_stack( | |
737 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
738 } else { | |
739 verify_error(bci, bad_type_msg, "pop2"); | |
740 return; | |
741 } | |
742 no_control_flow = false; break; | |
743 case Bytecodes::_dup : | |
744 type = current_frame.pop_stack( | |
745 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
746 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
747 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
748 no_control_flow = false; break; | |
749 case Bytecodes::_dup_x1 : | |
750 type = current_frame.pop_stack( | |
751 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
752 type2 = current_frame.pop_stack( | |
753 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
754 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
755 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
756 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
757 no_control_flow = false; break; | |
758 case Bytecodes::_dup_x2 : | |
759 { | |
760 VerificationType type3; | |
761 type = current_frame.pop_stack( | |
762 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
763 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
764 if (type2.is_category1()) { | |
765 type3 = current_frame.pop_stack( | |
766 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
767 } else if (type2.is_category2_2nd()) { | |
768 type3 = current_frame.pop_stack( | |
769 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
770 } else { | |
771 verify_error(bci, bad_type_msg, "dup_x2"); | |
772 return; | |
773 } | |
774 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
775 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
776 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
777 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
778 no_control_flow = false; break; | |
779 } | |
780 case Bytecodes::_dup2 : | |
781 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
782 if (type.is_category1()) { | |
783 type2 = current_frame.pop_stack( | |
784 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
785 } else if (type.is_category2_2nd()) { | |
786 type2 = current_frame.pop_stack( | |
787 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
788 } else { | |
789 verify_error(bci, bad_type_msg, "dup2"); | |
790 return; | |
791 } | |
792 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
793 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
794 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
795 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
796 no_control_flow = false; break; | |
797 case Bytecodes::_dup2_x1 : | |
798 { | |
799 VerificationType type3; | |
800 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
801 if (type.is_category1()) { | |
802 type2 = current_frame.pop_stack( | |
803 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
804 } else if(type.is_category2_2nd()) { | |
805 type2 = current_frame.pop_stack | |
806 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
807 } else { | |
808 verify_error(bci, bad_type_msg, "dup2_x1"); | |
809 return; | |
810 } | |
811 type3 = current_frame.pop_stack( | |
812 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
813 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
814 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
815 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
816 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
817 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
818 no_control_flow = false; break; | |
819 } | |
820 case Bytecodes::_dup2_x2 : | |
821 { | |
822 VerificationType type3, type4; | |
823 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
824 if (type.is_category1()) { | |
825 type2 = current_frame.pop_stack( | |
826 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
827 } else if (type.is_category2_2nd()) { | |
828 type2 = current_frame.pop_stack( | |
829 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
830 } else { | |
831 verify_error(bci, bad_type_msg, "dup2_x2"); | |
832 return; | |
833 } | |
834 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
835 if (type3.is_category1()) { | |
836 type4 = current_frame.pop_stack( | |
837 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
838 } else if (type3.is_category2_2nd()) { | |
839 type4 = current_frame.pop_stack( | |
840 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
841 } else { | |
842 verify_error(bci, bad_type_msg, "dup2_x2"); | |
843 return; | |
844 } | |
845 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
846 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
847 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
848 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
849 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
850 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
851 no_control_flow = false; break; | |
852 } | |
853 case Bytecodes::_swap : | |
854 type = current_frame.pop_stack( | |
855 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
856 type2 = current_frame.pop_stack( | |
857 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
858 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
859 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
860 no_control_flow = false; break; | |
861 case Bytecodes::_iadd : | |
862 case Bytecodes::_isub : | |
863 case Bytecodes::_imul : | |
864 case Bytecodes::_idiv : | |
865 case Bytecodes::_irem : | |
866 case Bytecodes::_ishl : | |
867 case Bytecodes::_ishr : | |
868 case Bytecodes::_iushr : | |
869 case Bytecodes::_ior : | |
870 case Bytecodes::_ixor : | |
871 case Bytecodes::_iand : | |
872 current_frame.pop_stack( | |
873 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
874 // fall through | |
875 case Bytecodes::_ineg : | |
876 current_frame.pop_stack( | |
877 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
878 current_frame.push_stack( | |
879 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
880 no_control_flow = false; break; | |
881 case Bytecodes::_ladd : | |
882 case Bytecodes::_lsub : | |
883 case Bytecodes::_lmul : | |
884 case Bytecodes::_ldiv : | |
885 case Bytecodes::_lrem : | |
886 case Bytecodes::_land : | |
887 case Bytecodes::_lor : | |
888 case Bytecodes::_lxor : | |
889 current_frame.pop_stack_2( | |
890 VerificationType::long2_type(), | |
891 VerificationType::long_type(), CHECK_VERIFY(this)); | |
892 // fall through | |
893 case Bytecodes::_lneg : | |
894 current_frame.pop_stack_2( | |
895 VerificationType::long2_type(), | |
896 VerificationType::long_type(), CHECK_VERIFY(this)); | |
897 current_frame.push_stack_2( | |
898 VerificationType::long_type(), | |
899 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
900 no_control_flow = false; break; | |
901 case Bytecodes::_lshl : | |
902 case Bytecodes::_lshr : | |
903 case Bytecodes::_lushr : | |
904 current_frame.pop_stack( | |
905 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
906 current_frame.pop_stack_2( | |
907 VerificationType::long2_type(), | |
908 VerificationType::long_type(), CHECK_VERIFY(this)); | |
909 current_frame.push_stack_2( | |
910 VerificationType::long_type(), | |
911 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
912 no_control_flow = false; break; | |
913 case Bytecodes::_fadd : | |
914 case Bytecodes::_fsub : | |
915 case Bytecodes::_fmul : | |
916 case Bytecodes::_fdiv : | |
917 case Bytecodes::_frem : | |
918 current_frame.pop_stack( | |
919 VerificationType::float_type(), CHECK_VERIFY(this)); | |
920 // fall through | |
921 case Bytecodes::_fneg : | |
922 current_frame.pop_stack( | |
923 VerificationType::float_type(), CHECK_VERIFY(this)); | |
924 current_frame.push_stack( | |
925 VerificationType::float_type(), CHECK_VERIFY(this)); | |
926 no_control_flow = false; break; | |
927 case Bytecodes::_dadd : | |
928 case Bytecodes::_dsub : | |
929 case Bytecodes::_dmul : | |
930 case Bytecodes::_ddiv : | |
931 case Bytecodes::_drem : | |
932 current_frame.pop_stack_2( | |
933 VerificationType::double2_type(), | |
934 VerificationType::double_type(), CHECK_VERIFY(this)); | |
935 // fall through | |
936 case Bytecodes::_dneg : | |
937 current_frame.pop_stack_2( | |
938 VerificationType::double2_type(), | |
939 VerificationType::double_type(), CHECK_VERIFY(this)); | |
940 current_frame.push_stack_2( | |
941 VerificationType::double_type(), | |
942 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
943 no_control_flow = false; break; | |
944 case Bytecodes::_iinc : | |
945 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
946 no_control_flow = false; break; | |
947 case Bytecodes::_i2l : | |
948 type = current_frame.pop_stack( | |
949 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
950 current_frame.push_stack_2( | |
951 VerificationType::long_type(), | |
952 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
953 no_control_flow = false; break; | |
954 case Bytecodes::_l2i : | |
955 current_frame.pop_stack_2( | |
956 VerificationType::long2_type(), | |
957 VerificationType::long_type(), CHECK_VERIFY(this)); | |
958 current_frame.push_stack( | |
959 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
960 no_control_flow = false; break; | |
961 case Bytecodes::_i2f : | |
962 current_frame.pop_stack( | |
963 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
964 current_frame.push_stack( | |
965 VerificationType::float_type(), CHECK_VERIFY(this)); | |
966 no_control_flow = false; break; | |
967 case Bytecodes::_i2d : | |
968 current_frame.pop_stack( | |
969 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
970 current_frame.push_stack_2( | |
971 VerificationType::double_type(), | |
972 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
973 no_control_flow = false; break; | |
974 case Bytecodes::_l2f : | |
975 current_frame.pop_stack_2( | |
976 VerificationType::long2_type(), | |
977 VerificationType::long_type(), CHECK_VERIFY(this)); | |
978 current_frame.push_stack( | |
979 VerificationType::float_type(), CHECK_VERIFY(this)); | |
980 no_control_flow = false; break; | |
981 case Bytecodes::_l2d : | |
982 current_frame.pop_stack_2( | |
983 VerificationType::long2_type(), | |
984 VerificationType::long_type(), CHECK_VERIFY(this)); | |
985 current_frame.push_stack_2( | |
986 VerificationType::double_type(), | |
987 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
988 no_control_flow = false; break; | |
989 case Bytecodes::_f2i : | |
990 current_frame.pop_stack( | |
991 VerificationType::float_type(), CHECK_VERIFY(this)); | |
992 current_frame.push_stack( | |
993 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
994 no_control_flow = false; break; | |
995 case Bytecodes::_f2l : | |
996 current_frame.pop_stack( | |
997 VerificationType::float_type(), CHECK_VERIFY(this)); | |
998 current_frame.push_stack_2( | |
999 VerificationType::long_type(), | |
1000 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1001 no_control_flow = false; break; | |
1002 case Bytecodes::_f2d : | |
1003 current_frame.pop_stack( | |
1004 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1005 current_frame.push_stack_2( | |
1006 VerificationType::double_type(), | |
1007 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1008 no_control_flow = false; break; | |
1009 case Bytecodes::_d2i : | |
1010 current_frame.pop_stack_2( | |
1011 VerificationType::double2_type(), | |
1012 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1013 current_frame.push_stack( | |
1014 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1015 no_control_flow = false; break; | |
1016 case Bytecodes::_d2l : | |
1017 current_frame.pop_stack_2( | |
1018 VerificationType::double2_type(), | |
1019 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1020 current_frame.push_stack_2( | |
1021 VerificationType::long_type(), | |
1022 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1023 no_control_flow = false; break; | |
1024 case Bytecodes::_d2f : | |
1025 current_frame.pop_stack_2( | |
1026 VerificationType::double2_type(), | |
1027 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1028 current_frame.push_stack( | |
1029 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1030 no_control_flow = false; break; | |
1031 case Bytecodes::_i2b : | |
1032 case Bytecodes::_i2c : | |
1033 case Bytecodes::_i2s : | |
1034 current_frame.pop_stack( | |
1035 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1036 current_frame.push_stack( | |
1037 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1038 no_control_flow = false; break; | |
1039 case Bytecodes::_lcmp : | |
1040 current_frame.pop_stack_2( | |
1041 VerificationType::long2_type(), | |
1042 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1043 current_frame.pop_stack_2( | |
1044 VerificationType::long2_type(), | |
1045 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1046 current_frame.push_stack( | |
1047 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1048 no_control_flow = false; break; | |
1049 case Bytecodes::_fcmpl : | |
1050 case Bytecodes::_fcmpg : | |
1051 current_frame.pop_stack( | |
1052 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1053 current_frame.pop_stack( | |
1054 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1055 current_frame.push_stack( | |
1056 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1057 no_control_flow = false; break; | |
1058 case Bytecodes::_dcmpl : | |
1059 case Bytecodes::_dcmpg : | |
1060 current_frame.pop_stack_2( | |
1061 VerificationType::double2_type(), | |
1062 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1063 current_frame.pop_stack_2( | |
1064 VerificationType::double2_type(), | |
1065 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1066 current_frame.push_stack( | |
1067 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1068 no_control_flow = false; break; | |
1069 case Bytecodes::_if_icmpeq: | |
1070 case Bytecodes::_if_icmpne: | |
1071 case Bytecodes::_if_icmplt: | |
1072 case Bytecodes::_if_icmpge: | |
1073 case Bytecodes::_if_icmpgt: | |
1074 case Bytecodes::_if_icmple: | |
1075 current_frame.pop_stack( | |
1076 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1077 // fall through | |
1078 case Bytecodes::_ifeq: | |
1079 case Bytecodes::_ifne: | |
1080 case Bytecodes::_iflt: | |
1081 case Bytecodes::_ifge: | |
1082 case Bytecodes::_ifgt: | |
1083 case Bytecodes::_ifle: | |
1084 current_frame.pop_stack( | |
1085 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1086 target = bcs.dest(); | |
1087 stackmap_table.check_jump_target( | |
1088 ¤t_frame, target, CHECK_VERIFY(this)); | |
1089 no_control_flow = false; break; | |
1090 case Bytecodes::_if_acmpeq : | |
1091 case Bytecodes::_if_acmpne : | |
1092 current_frame.pop_stack( | |
1093 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1094 // fall through | |
1095 case Bytecodes::_ifnull : | |
1096 case Bytecodes::_ifnonnull : | |
1097 current_frame.pop_stack( | |
1098 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1099 target = bcs.dest(); | |
1100 stackmap_table.check_jump_target | |
1101 (¤t_frame, target, CHECK_VERIFY(this)); | |
1102 no_control_flow = false; break; | |
1103 case Bytecodes::_goto : | |
1104 target = bcs.dest(); | |
1105 stackmap_table.check_jump_target( | |
1106 ¤t_frame, target, CHECK_VERIFY(this)); | |
1107 no_control_flow = true; break; | |
1108 case Bytecodes::_goto_w : | |
1109 target = bcs.dest_w(); | |
1110 stackmap_table.check_jump_target( | |
1111 ¤t_frame, target, CHECK_VERIFY(this)); | |
1112 no_control_flow = true; break; | |
1113 case Bytecodes::_tableswitch : | |
1114 case Bytecodes::_lookupswitch : | |
1115 verify_switch( | |
1116 &bcs, code_length, code_data, ¤t_frame, | |
1117 &stackmap_table, CHECK_VERIFY(this)); | |
1118 no_control_flow = true; break; | |
1119 case Bytecodes::_ireturn : | |
1120 type = current_frame.pop_stack( | |
1121 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1122 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1123 no_control_flow = true; break; | |
1124 case Bytecodes::_lreturn : | |
1125 type2 = current_frame.pop_stack( | |
1126 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1127 type = current_frame.pop_stack( | |
1128 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1129 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1130 no_control_flow = true; break; | |
1131 case Bytecodes::_freturn : | |
1132 type = current_frame.pop_stack( | |
1133 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1134 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1135 no_control_flow = true; break; | |
1136 case Bytecodes::_dreturn : | |
1137 type2 = current_frame.pop_stack( | |
1138 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1139 type = current_frame.pop_stack( | |
1140 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1141 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1142 no_control_flow = true; break; | |
1143 case Bytecodes::_areturn : | |
1144 type = current_frame.pop_stack( | |
1145 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1146 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1147 no_control_flow = true; break; | |
1148 case Bytecodes::_return : | |
1149 if (return_type != VerificationType::bogus_type()) { | |
1150 verify_error(bci, "Method expects no return value"); | |
1151 return; | |
1152 } | |
1153 // Make sure "this" has been initialized if current method is an | |
1154 // <init> | |
1155 if (_method->name() == vmSymbols::object_initializer_name() && | |
1156 current_frame.flag_this_uninit()) { | |
1157 verify_error(bci, | |
1158 "Constructor must call super() or this() before return"); | |
1159 return; | |
1160 } | |
1161 no_control_flow = true; break; | |
1162 case Bytecodes::_getstatic : | |
1163 case Bytecodes::_putstatic : | |
1164 case Bytecodes::_getfield : | |
1165 case Bytecodes::_putfield : | |
1166 verify_field_instructions( | |
1167 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1168 no_control_flow = false; break; | |
1169 case Bytecodes::_invokevirtual : | |
1170 case Bytecodes::_invokespecial : | |
1171 case Bytecodes::_invokestatic : | |
1172 verify_invoke_instructions( | |
1173 &bcs, code_length, ¤t_frame, | |
1174 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1175 no_control_flow = false; break; | |
1176 case Bytecodes::_invokeinterface : | |
1177 verify_invoke_instructions( | |
1178 &bcs, code_length, ¤t_frame, | |
1179 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1180 no_control_flow = false; break; | |
1181 case Bytecodes::_new : | |
1182 { | |
1183 index = bcs.get_index_big(); | |
1184 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1185 VerificationType new_class_type = | |
1186 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1187 if (!new_class_type.is_object()) { | |
1188 verify_error(bci, "Illegal new instruction"); | |
1189 return; | |
1190 } | |
1191 type = VerificationType::uninitialized_type(bci); | |
1192 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1193 no_control_flow = false; break; | |
1194 } | |
1195 case Bytecodes::_newarray : | |
1196 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1197 current_frame.pop_stack( | |
1198 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1199 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1200 no_control_flow = false; break; | |
1201 case Bytecodes::_anewarray : | |
1202 verify_anewarray( | |
1203 bcs.get_index_big(), cp, ¤t_frame, CHECK_VERIFY(this)); | |
1204 no_control_flow = false; break; | |
1205 case Bytecodes::_arraylength : | |
1206 type = current_frame.pop_stack( | |
1207 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1208 if (!type.is_array()) { | |
1209 verify_error(bci, bad_type_msg, "arraylength"); | |
1210 } | |
1211 current_frame.push_stack( | |
1212 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1213 no_control_flow = false; break; | |
1214 case Bytecodes::_checkcast : | |
1215 { | |
1216 index = bcs.get_index_big(); | |
1217 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1218 current_frame.pop_stack( | |
1219 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1220 VerificationType klass_type = cp_index_to_type( | |
1221 index, cp, CHECK_VERIFY(this)); | |
1222 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1223 no_control_flow = false; break; | |
1224 } | |
1225 case Bytecodes::_instanceof : { | |
1226 index = bcs.get_index_big(); | |
1227 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1228 current_frame.pop_stack( | |
1229 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1230 current_frame.push_stack( | |
1231 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1232 no_control_flow = false; break; | |
1233 } | |
1234 case Bytecodes::_monitorenter : | |
1235 case Bytecodes::_monitorexit : | |
1236 current_frame.pop_stack( | |
1237 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1238 no_control_flow = false; break; | |
1239 case Bytecodes::_multianewarray : | |
1240 { | |
1241 index = bcs.get_index_big(); | |
1242 u2 dim = *(bcs.bcp()+3); | |
1243 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1244 VerificationType new_array_type = | |
1245 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1246 if (!new_array_type.is_array()) { | |
1247 verify_error(bci, | |
1248 "Illegal constant pool index in multianewarray instruction"); | |
1249 return; | |
1250 } | |
1251 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1252 verify_error(bci, | |
1253 "Illegal dimension in multianewarray instruction"); | |
1254 return; | |
1255 } | |
1256 for (int i = 0; i < dim; i++) { | |
1257 current_frame.pop_stack( | |
1258 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1259 } | |
1260 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1261 no_control_flow = false; break; | |
1262 } | |
1263 case Bytecodes::_athrow : | |
1264 type = VerificationType::reference_type( | |
1265 vmSymbols::java_lang_Throwable()); | |
1266 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1267 no_control_flow = true; break; | |
1268 default: | |
1269 // We only need to check the valid bytecodes in class file. | |
1270 // And jsr and ret are not in the new class file format in JDK1.5. | |
1271 verify_error(bci, "Bad instruction"); | |
1272 no_control_flow = false; | |
1273 return; | |
1274 } // end switch | |
1275 } // end Merge with the next instruction | |
1276 | |
1277 // Look for possible jump target in exception handlers and see if it | |
1278 // matches current_frame | |
1279 if (bci >= ex_min && bci < ex_max) { | |
1280 verify_exception_handler_targets( | |
1281 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1282 } | |
1283 } // end while | |
1284 | |
1285 // Make sure that control flow does not fall through end of the method | |
1286 if (!no_control_flow) { | |
1287 verify_error(code_length, "Control flow falls through code end"); | |
1288 return; | |
1289 } | |
1290 } | |
1291 | |
1292 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1293 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1294 memset(code_data, 0, sizeof(char) * code_length); | |
1295 RawBytecodeStream bcs(m); | |
1296 | |
1297 while (!bcs.is_last_bytecode()) { | |
1298 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1299 int bci = bcs.bci(); | |
1300 if (bcs.code() == Bytecodes::_new) { | |
1301 code_data[bci] = NEW_OFFSET; | |
1302 } else { | |
1303 code_data[bci] = BYTECODE_OFFSET; | |
1304 } | |
1305 } else { | |
1306 verify_error(bcs.bci(), "Bad instruction"); | |
1307 return NULL; | |
1308 } | |
1309 } | |
1310 | |
1311 return code_data; | |
1312 } | |
1313 | |
1314 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1315 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1316 constantPoolHandle cp (THREAD, _method->constants()); | |
1317 | |
1318 if (exhandlers() != NULL) { | |
1319 for(int i = 0; i < exhandlers->length();) { | |
1320 u2 start_pc = exhandlers->int_at(i++); | |
1321 u2 end_pc = exhandlers->int_at(i++); | |
1322 u2 handler_pc = exhandlers->int_at(i++); | |
1323 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1324 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1325 return; | |
1326 } | |
1327 if (end_pc != code_length) { // special case: end_pc == code_length | |
1328 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1329 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1330 return; | |
1331 } | |
1332 } | |
1333 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1334 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1335 return; | |
1336 } | |
1337 int catch_type_index = exhandlers->int_at(i++); | |
1338 if (catch_type_index != 0) { | |
1339 VerificationType catch_type = cp_index_to_type( | |
1340 catch_type_index, cp, CHECK_VERIFY(this)); | |
1341 VerificationType throwable = | |
1342 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1343 bool is_subclass = throwable.is_assignable_from( | |
1344 catch_type, current_class(), CHECK_VERIFY(this)); | |
1345 if (!is_subclass) { | |
1346 // 4286534: should throw VerifyError according to recent spec change | |
1347 verify_error( | |
1348 "Catch type is not a subclass of Throwable in handler %d", | |
1349 handler_pc); | |
1350 return; | |
1351 } | |
1352 } | |
1353 if (start_pc < min) min = start_pc; | |
1354 if (end_pc > max) max = end_pc; | |
1355 } | |
1356 } | |
1357 } | |
1358 | |
1359 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1360 int localvariable_table_length = _method()->localvariable_table_length(); | |
1361 if (localvariable_table_length > 0) { | |
1362 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1363 for (int i = 0; i < localvariable_table_length; i++) { | |
1364 u2 start_bci = table[i].start_bci; | |
1365 u2 length = table[i].length; | |
1366 | |
1367 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1368 class_format_error( | |
1369 "Illegal local variable table start_pc %d", start_bci); | |
1370 return; | |
1371 } | |
1372 u4 end_bci = (u4)(start_bci + length); | |
1373 if (end_bci != code_length) { | |
1374 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1375 class_format_error( "Illegal local variable table length %d", length); | |
1376 return; | |
1377 } | |
1378 } | |
1379 } | |
1380 } | |
1381 } | |
1382 | |
1383 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1384 StackMapFrame* current_frame, | |
1385 StackMapTable* stackmap_table, | |
1386 bool no_control_flow, TRAPS) { | |
1387 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1388 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1389 if (no_control_flow && this_offset > bci) { | |
1390 verify_error(bci, "Expecting a stack map frame"); | |
1391 return 0; | |
1392 } | |
1393 if (this_offset == bci) { | |
1394 // See if current stack map can be assigned to the frame in table. | |
1395 // current_frame is the stackmap frame got from the last instruction. | |
1396 // If matched, current_frame will be updated by this method. | |
1397 bool match = stackmap_table->match_stackmap( | |
1398 current_frame, this_offset, stackmap_index, | |
1399 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1400 if (!match) { | |
1401 // report type error | |
1402 verify_error(bci, "Instruction type does not match stack map"); | |
1403 return 0; | |
1404 } | |
1405 stackmap_index++; | |
1406 } else if (this_offset < bci) { | |
1407 // current_offset should have met this_offset. | |
1408 class_format_error("Bad stack map offset %d", this_offset); | |
1409 return 0; | |
1410 } | |
1411 } else if (no_control_flow) { | |
1412 verify_error(bci, "Expecting a stack map frame"); | |
1413 return 0; | |
1414 } | |
1415 return stackmap_index; | |
1416 } | |
1417 | |
1418 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1419 StackMapTable* stackmap_table, TRAPS) { | |
1420 constantPoolHandle cp (THREAD, _method->constants()); | |
1421 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1422 if (exhandlers() != NULL) { | |
1423 for(int i = 0; i < exhandlers->length();) { | |
1424 u2 start_pc = exhandlers->int_at(i++); | |
1425 u2 end_pc = exhandlers->int_at(i++); | |
1426 u2 handler_pc = exhandlers->int_at(i++); | |
1427 int catch_type_index = exhandlers->int_at(i++); | |
1428 if(bci >= start_pc && bci < end_pc) { | |
1429 u1 flags = current_frame->flags(); | |
1430 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1431 | |
1432 ResourceMark rm(THREAD); | |
1433 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1434 if (catch_type_index != 0) { | |
1435 // We know that this index refers to a subclass of Throwable | |
1436 VerificationType catch_type = cp_index_to_type( | |
1437 catch_type_index, cp, CHECK_VERIFY(this)); | |
1438 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1439 } else { | |
1440 VerificationType throwable = | |
1441 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1442 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1443 } | |
1444 bool match = stackmap_table->match_stackmap( | |
1445 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1446 if (!match) { | |
1447 verify_error(bci, | |
1448 "Stack map does not match the one at exception handler %d", | |
1449 handler_pc); | |
1450 return; | |
1451 } | |
1452 } | |
1453 } | |
1454 } | |
1455 } | |
1456 | |
1457 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1458 int nconstants = cp->length(); | |
1459 if ((index <= 0) || (index >= nconstants)) { | |
1460 verify_error("Illegal constant pool index %d in class %s", | |
1461 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1462 return; | |
1463 } | |
1464 } | |
1465 | |
1466 void ClassVerifier::verify_cp_type( | |
1467 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1468 | |
1469 // In some situations, bytecode rewriting may occur while we're verifying. | |
1470 // In this case, a constant pool cache exists and some indices refer to that | |
1471 // instead. Get the original index for the tag check | |
1472 constantPoolCacheOop cache = cp->cache(); | |
1473 if (cache != NULL && | |
1474 ((types == (1 << JVM_CONSTANT_InterfaceMethodref)) || | |
1475 (types == (1 << JVM_CONSTANT_Methodref)) || | |
1476 (types == (1 << JVM_CONSTANT_Fieldref)))) { | |
1477 int native_index = index; | |
1478 if (Bytes::is_Java_byte_ordering_different()) { | |
1479 native_index = Bytes::swap_u2(index); | |
1480 } | |
1481 assert((native_index >= 0) && (native_index < cache->length()), | |
1482 "Must be a legal index into the cp cache"); | |
1483 index = cache->entry_at(native_index)->constant_pool_index(); | |
1484 } | |
1485 | |
1486 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1487 unsigned int tag = cp->tag_at(index).value(); | |
1488 if ((types & (1 << tag)) == 0) { | |
1489 verify_error( | |
1490 "Illegal type at constant pool entry %d in class %s", | |
1491 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1492 return; | |
1493 } | |
1494 } | |
1495 | |
1496 void ClassVerifier::verify_cp_class_type( | |
1497 int index, constantPoolHandle cp, TRAPS) { | |
1498 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1499 constantTag tag = cp->tag_at(index); | |
1500 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1501 verify_error("Illegal type at constant pool entry %d in class %s", | |
1502 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1503 return; | |
1504 } | |
1505 } | |
1506 | |
1507 void ClassVerifier::format_error_message( | |
1508 const char* fmt, int offset, va_list va) { | |
1509 ResourceMark rm(_thread); | |
1510 stringStream message(_message, _message_buffer_len); | |
1511 message.vprint(fmt, va); | |
1512 if (!_method.is_null()) { | |
1513 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1514 } | |
1515 if (offset != -1) { | |
1516 message.print(" at offset %d", offset); | |
1517 } | |
1518 } | |
1519 | |
1520 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1521 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1522 va_list va; | |
1523 va_start(va, fmt); | |
1524 format_error_message(fmt, offset, va); | |
1525 va_end(va); | |
1526 } | |
1527 | |
1528 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1529 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1530 va_list va; | |
1531 va_start(va, fmt); | |
1532 format_error_message(fmt, -1, va); | |
1533 va_end(va); | |
1534 } | |
1535 | |
1536 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1537 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1538 va_list va; | |
1539 va_start(va, msg); | |
1540 format_error_message(msg, -1, va); | |
1541 va_end(va); | |
1542 } | |
1543 | |
1544 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
1545 // Get current loader and protection domain first. | |
1546 oop loader = current_class()->class_loader(); | |
1547 oop protection_domain = current_class()->protection_domain(); | |
1548 | |
1549 return SystemDictionary::resolve_or_fail( | |
1550 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1551 true, CHECK_NULL); | |
1552 } | |
1553 | |
1554 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1555 klassOop target_class, | |
1556 symbolOop field_name, | |
1557 symbolOop field_sig, | |
1558 bool is_method) { | |
1559 No_Safepoint_Verifier nosafepoint; | |
1560 | |
1561 // If target class isn't a super class of this class, we don't worry about this case | |
1562 if (!this_class->is_subclass_of(target_class)) { | |
1563 return false; | |
1564 } | |
1565 // Check if the specified method or field is protected | |
1566 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1567 fieldDescriptor fd; | |
1568 if (is_method) { | |
1569 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1570 if (m != NULL && m->is_protected()) { | |
1571 if (!this_class->is_same_class_package(m->method_holder())) { | |
1572 return true; | |
1573 } | |
1574 } | |
1575 } else { | |
1576 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1577 if(member_klass != NULL && fd.is_protected()) { | |
1578 if (!this_class->is_same_class_package(member_klass)) { | |
1579 return true; | |
1580 } | |
1581 } | |
1582 } | |
1583 return false; | |
1584 } | |
1585 | |
1586 void ClassVerifier::verify_ldc( | |
1587 int opcode, u2 index, StackMapFrame *current_frame, | |
1588 constantPoolHandle cp, u2 bci, TRAPS) { | |
1589 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1590 constantTag tag = cp->tag_at(index); | |
1591 unsigned int types; | |
1592 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1593 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1594 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1595 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class); | |
1596 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1597 } | |
1598 } else { | |
1599 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1600 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1601 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1602 } | |
1603 if (tag.is_string() || tag.is_unresolved_string()) { | |
1604 current_frame->push_stack( | |
1605 VerificationType::reference_type( | |
1606 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1607 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1608 current_frame->push_stack( | |
1609 VerificationType::reference_type( | |
1610 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1611 } else if (tag.is_int()) { | |
1612 current_frame->push_stack( | |
1613 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1614 } else if (tag.is_float()) { | |
1615 current_frame->push_stack( | |
1616 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1617 } else if (tag.is_double()) { | |
1618 current_frame->push_stack_2( | |
1619 VerificationType::double_type(), | |
1620 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1621 } else if (tag.is_long()) { | |
1622 current_frame->push_stack_2( | |
1623 VerificationType::long_type(), | |
1624 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1625 } else { | |
1626 verify_error(bci, "Invalid index in ldc"); | |
1627 return; | |
1628 } | |
1629 } | |
1630 | |
1631 void ClassVerifier::verify_switch( | |
1632 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1633 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1634 int bci = bcs->bci(); | |
1635 address bcp = bcs->bcp(); | |
1636 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1637 | |
1638 // 4639449 & 4647081: padding bytes must be 0 | |
1639 u2 padding_offset = 1; | |
1640 while ((bcp + padding_offset) < aligned_bcp) { | |
1641 if(*(bcp + padding_offset) != 0) { | |
1642 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1643 return; | |
1644 } | |
1645 padding_offset++; | |
1646 } | |
1647 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1648 int keys, delta; | |
1649 current_frame->pop_stack( | |
1650 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1651 if (bcs->code() == Bytecodes::_tableswitch) { | |
1652 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1653 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1654 if (low > high) { | |
1655 verify_error(bci, | |
1656 "low must be less than or equal to high in tableswitch"); | |
1657 return; | |
1658 } | |
1659 keys = high - low + 1; | |
1660 if (keys < 0) { | |
1661 verify_error(bci, "too many keys in tableswitch"); | |
1662 return; | |
1663 } | |
1664 delta = 1; | |
1665 } else { | |
1666 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1667 if (keys < 0) { | |
1668 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1669 return; | |
1670 } | |
1671 delta = 2; | |
1672 // Make sure that the lookupswitch items are sorted | |
1673 for (int i = 0; i < (keys - 1); i++) { | |
1674 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1675 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1676 if (this_key >= next_key) { | |
1677 verify_error(bci, "Bad lookupswitch instruction"); | |
1678 return; | |
1679 } | |
1680 } | |
1681 } | |
1682 int target = bci + default_offset; | |
1683 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1684 for (int i = 0; i < keys; i++) { | |
1685 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1686 stackmap_table->check_jump_target( | |
1687 current_frame, target, CHECK_VERIFY(this)); | |
1688 } | |
1689 } | |
1690 | |
1691 bool ClassVerifier::name_in_supers( | |
1692 symbolOop ref_name, instanceKlassHandle current) { | |
1693 klassOop super = current->super(); | |
1694 while (super != NULL) { | |
1695 if (super->klass_part()->name() == ref_name) { | |
1696 return true; | |
1697 } | |
1698 super = super->klass_part()->super(); | |
1699 } | |
1700 return false; | |
1701 } | |
1702 | |
1703 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1704 StackMapFrame* current_frame, | |
1705 constantPoolHandle cp, | |
1706 TRAPS) { | |
1707 u2 index = bcs->get_index_big(); | |
1708 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); | |
1709 | |
1710 // Get field name and signature | |
1711 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
1712 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
1713 | |
1714 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1715 class_format_error( | |
1716 "Invalid signature for field in class %s referenced " | |
1717 "from constant pool index %d", _klass->external_name(), index); | |
1718 return; | |
1719 } | |
1720 | |
1721 // Get referenced class type | |
1722 VerificationType ref_class_type = cp_ref_index_to_type( | |
1723 index, cp, CHECK_VERIFY(this)); | |
1724 if (!ref_class_type.is_object()) { | |
1725 verify_error( | |
1726 "Expecting reference to class in class %s at constant pool index %d", | |
1727 _klass->external_name(), index); | |
1728 return; | |
1729 } | |
1730 VerificationType target_class_type = ref_class_type; | |
1731 | |
1732 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1733 "buffer type must match VerificationType size"); | |
1734 uintptr_t field_type_buffer[2]; | |
1735 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1736 // If we make a VerificationType[2] array directly, the compiler calls | |
1737 // to the c-runtime library to do the allocation instead of just | |
1738 // stack allocating it. Plus it would run constructors. This shows up | |
1739 // in performance profiles. | |
1740 | |
1741 SignatureStream sig_stream(field_sig, false); | |
1742 VerificationType stack_object_type; | |
1743 int n = change_sig_to_verificationType( | |
1744 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1745 u2 bci = bcs->bci(); | |
1746 bool is_assignable; | |
1747 switch (bcs->code()) { | |
1748 case Bytecodes::_getstatic: { | |
1749 for (int i = 0; i < n; i++) { | |
1750 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1751 } | |
1752 break; | |
1753 } | |
1754 case Bytecodes::_putstatic: { | |
1755 for (int i = n - 1; i >= 0; i--) { | |
1756 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1757 } | |
1758 break; | |
1759 } | |
1760 case Bytecodes::_getfield: { | |
1761 stack_object_type = current_frame->pop_stack( | |
1762 target_class_type, CHECK_VERIFY(this)); | |
1763 for (int i = 0; i < n; i++) { | |
1764 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1765 } | |
1766 goto check_protected; | |
1767 } | |
1768 case Bytecodes::_putfield: { | |
1769 for (int i = n - 1; i >= 0; i--) { | |
1770 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1771 } | |
1772 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1773 | |
1774 // The JVMS 2nd edition allows field initialization before the superclass | |
1775 // initializer, if the field is defined within the current class. | |
1776 fieldDescriptor fd; | |
1777 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1778 target_class_type.equals(current_type()) && | |
1779 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
1780 stack_object_type = current_type(); | |
1781 } | |
1782 is_assignable = target_class_type.is_assignable_from( | |
1783 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1784 if (!is_assignable) { | |
1785 verify_error(bci, "Bad type on operand stack in putfield"); | |
1786 return; | |
1787 } | |
1788 } | |
1789 check_protected: { | |
1790 if (_this_type == stack_object_type) | |
1791 break; // stack_object_type must be assignable to _current_class_type | |
1792 symbolHandle ref_class_name = symbolHandle(THREAD, | |
1793 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
1794 if (!name_in_supers(ref_class_name(), current_class())) | |
1795 // stack_object_type must be assignable to _current_class_type since: | |
1796 // 1. stack_object_type must be assignable to ref_class. | |
1797 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1798 // be a superclass of it. See revised JVMS 5.4.4. | |
1799 break; | |
1800 | |
1801 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
1802 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
1803 field_sig(), false)) { | |
1804 // It's protected access, check if stack object is assignable to | |
1805 // current class. | |
1806 is_assignable = current_type().is_assignable_from( | |
1807 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1808 if (!is_assignable) { | |
1809 verify_error(bci, "Bad access to protected data in getfield"); | |
1810 return; | |
1811 } | |
1812 } | |
1813 break; | |
1814 } | |
1815 default: ShouldNotReachHere(); | |
1816 } | |
1817 } | |
1818 | |
1819 void ClassVerifier::verify_invoke_init( | |
1820 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1821 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1822 constantPoolHandle cp, TRAPS) { | |
1823 u2 bci = bcs->bci(); | |
1824 VerificationType type = current_frame->pop_stack( | |
1825 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1826 if (type == VerificationType::uninitialized_this_type()) { | |
1827 // The method must be an <init> method of either this class, or one of its | |
1828 // superclasses | |
1829 klassOop oop = current_class()(); | |
1830 Klass* klass = oop->klass_part(); | |
1831 while (klass != NULL && ref_class_type.name() != klass->name()) { | |
1832 klass = klass->super()->klass_part(); | |
1833 } | |
1834 if (klass == NULL) { | |
1835 verify_error(bci, "Bad <init> method call"); | |
1836 return; | |
1837 } | |
1838 current_frame->initialize_object(type, current_type()); | |
1839 *this_uninit = true; | |
1840 } else if (type.is_uninitialized()) { | |
1841 u2 new_offset = type.bci(); | |
1842 address new_bcp = bcs->bcp() - bci + new_offset; | |
1843 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1844 verify_error(new_offset, "Expecting new instruction"); | |
1845 return; | |
1846 } | |
1847 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1848 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1849 | |
1850 // The method must be an <init> method of the indicated class | |
1851 VerificationType new_class_type = cp_index_to_type( | |
1852 new_class_index, cp, CHECK_VERIFY(this)); | |
1853 if (!new_class_type.equals(ref_class_type)) { | |
1854 verify_error(bci, "Call to wrong <init> method"); | |
1855 return; | |
1856 } | |
1857 // According to the VM spec, if the referent class is a superclass of the | |
1858 // current class, and is in a different runtime package, and the method is | |
1859 // protected, then the objectref must be the current class or a subclass | |
1860 // of the current class. | |
1861 VerificationType objectref_type = new_class_type; | |
1862 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1863 klassOop ref_klass = load_class( | |
1864 ref_class_type.name(), CHECK_VERIFY(this)); | |
1865 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1866 vmSymbols::object_initializer_name(), | |
1867 cp->signature_ref_at(bcs->get_index_big())); | |
1868 instanceKlassHandle mh(THREAD, m->method_holder()); | |
1869 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1870 bool assignable = current_type().is_assignable_from( | |
1871 objectref_type, current_class(), CHECK_VERIFY(this)); | |
1872 if (!assignable) { | |
1873 verify_error(bci, "Bad access to protected <init> method"); | |
1874 return; | |
1875 } | |
1876 } | |
1877 } | |
1878 current_frame->initialize_object(type, new_class_type); | |
1879 } else { | |
1880 verify_error(bci, "Bad operand type when invoking <init>"); | |
1881 return; | |
1882 } | |
1883 } | |
1884 | |
1885 void ClassVerifier::verify_invoke_instructions( | |
1886 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1887 bool *this_uninit, VerificationType return_type, | |
1888 constantPoolHandle cp, TRAPS) { | |
1889 // Make sure the constant pool item is the right type | |
1890 u2 index = bcs->get_index_big(); | |
1891 Bytecodes::Code opcode = bcs->code(); | |
1892 unsigned int types = (opcode == Bytecodes::_invokeinterface | |
1893 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
1894 : 1 << JVM_CONSTANT_Methodref); | |
1895 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1896 | |
1897 // Get method name and signature | |
1898 symbolHandle method_name(THREAD, cp->name_ref_at(index)); | |
1899 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); | |
1900 | |
1901 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1902 class_format_error( | |
1903 "Invalid method signature in class %s referenced " | |
1904 "from constant pool index %d", _klass->external_name(), index); | |
1905 return; | |
1906 } | |
1907 | |
1908 // Get referenced class type | |
1909 VerificationType ref_class_type = cp_ref_index_to_type( | |
1910 index, cp, CHECK_VERIFY(this)); | |
1911 | |
1912 // For a small signature length, we just allocate 128 bytes instead | |
1913 // of parsing the signature once to find its size. | |
1914 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1915 // longs/doubles to be consertive. | |
1916 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1917 "buffer type must match VerificationType size"); | |
1918 uintptr_t on_stack_sig_types_buffer[128]; | |
1919 // If we make a VerificationType[128] array directly, the compiler calls | |
1920 // to the c-runtime library to do the allocation instead of just | |
1921 // stack allocating it. Plus it would run constructors. This shows up | |
1922 // in performance profiles. | |
1923 | |
1924 VerificationType* sig_types; | |
1925 int size = (method_sig->utf8_length() - 3) * 2; | |
1926 if (size > 128) { | |
1927 // Long and double occupies two slots here. | |
1928 ArgumentSizeComputer size_it(method_sig); | |
1929 size = size_it.size(); | |
1930 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1931 } else{ | |
1932 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1933 } | |
1934 SignatureStream sig_stream(method_sig); | |
1935 int sig_i = 0; | |
1936 while (!sig_stream.at_return_type()) { | |
1937 sig_i += change_sig_to_verificationType( | |
1938 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
1939 sig_stream.next(); | |
1940 } | |
1941 int nargs = sig_i; | |
1942 | |
1943 #ifdef ASSERT | |
1944 { | |
1945 ArgumentSizeComputer size_it(method_sig); | |
1946 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
1947 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
1948 } | |
1949 #endif | |
1950 | |
1951 // Check instruction operands | |
1952 u2 bci = bcs->bci(); | |
1953 if (opcode == Bytecodes::_invokeinterface) { | |
1954 address bcp = bcs->bcp(); | |
1955 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
1956 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
1957 // the difference between the size of the operand stack before and after the instruction | |
1958 // executes. | |
1959 if (*(bcp+3) != (nargs+1)) { | |
1960 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
1961 return; | |
1962 } | |
1963 if (*(bcp+4) != 0) { | |
1964 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
1965 return; | |
1966 } | |
1967 } | |
1968 | |
1969 if (method_name->byte_at(0) == '<') { | |
1970 // Make sure <init> can only be invoked by invokespecial | |
1971 if (opcode != Bytecodes::_invokespecial || | |
1972 method_name() != vmSymbols::object_initializer_name()) { | |
1973 verify_error(bci, "Illegal call to internal method"); | |
1974 return; | |
1975 } | |
1976 } else if (opcode == Bytecodes::_invokespecial | |
1977 && !ref_class_type.equals(current_type()) | |
1978 && !ref_class_type.equals(VerificationType::reference_type( | |
1979 current_class()->super()->klass_part()->name()))) { | |
1980 bool subtype = ref_class_type.is_assignable_from( | |
1981 current_type(), current_class(), CHECK_VERIFY(this)); | |
1982 if (!subtype) { | |
1983 verify_error(bci, "Bad invokespecial instruction: " | |
1984 "current class isn't assignable to reference class."); | |
1985 return; | |
1986 } | |
1987 } | |
1988 // Match method descriptor with operand stack | |
1989 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
1990 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
1991 } | |
1992 // Check objectref on operand stack | |
1993 if (opcode != Bytecodes::_invokestatic) { | |
1994 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method | |
1995 verify_invoke_init(bcs, ref_class_type, current_frame, | |
1996 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
1997 } else { // other methods | |
1998 // Ensures that target class is assignable to method class. | |
1999 if (opcode == Bytecodes::_invokespecial) { | |
2000 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2001 } else if (opcode == Bytecodes::_invokevirtual) { | |
2002 VerificationType stack_object_type = | |
2003 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2004 if (current_type() != stack_object_type) { | |
2005 assert(cp->cache() == NULL, "not rewritten yet"); | |
2006 symbolHandle ref_class_name = symbolHandle(THREAD, | |
2007 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
2008 // See the comments in verify_field_instructions() for | |
2009 // the rationale behind this. | |
2010 if (name_in_supers(ref_class_name(), current_class())) { | |
2011 klassOop ref_class = load_class(ref_class_name, CHECK); | |
2012 if (is_protected_access( | |
2013 _klass, ref_class, method_name(), method_sig(), true)) { | |
2014 // It's protected access, check if stack object is | |
2015 // assignable to current class. | |
2016 bool is_assignable = current_type().is_assignable_from( | |
2017 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
2018 if (!is_assignable) { | |
2019 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2020 && stack_object_type.is_array() | |
2021 && method_name() == vmSymbols::clone_name()) { | |
2022 // Special case: arrays pretend to implement public Object | |
2023 // clone(). | |
2024 } else { | |
2025 verify_error(bci, | |
2026 "Bad access to protected data in invokevirtual"); | |
2027 return; | |
2028 } | |
2029 } | |
2030 } | |
2031 } | |
2032 } | |
2033 } else { | |
2034 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2035 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2036 } | |
2037 } | |
2038 } | |
2039 // Push the result type. | |
2040 if (sig_stream.type() != T_VOID) { | |
2041 if (method_name() == vmSymbols::object_initializer_name()) { | |
2042 // <init> method must have a void return type | |
2043 verify_error(bci, "Return type must be void in <init> method"); | |
2044 return; | |
2045 } | |
2046 VerificationType return_type[2]; | |
2047 int n = change_sig_to_verificationType( | |
2048 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2049 for (int i = 0; i < n; i++) { | |
2050 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2051 } | |
2052 } | |
2053 } | |
2054 | |
2055 VerificationType ClassVerifier::get_newarray_type( | |
2056 u2 index, u2 bci, TRAPS) { | |
2057 const char* from_bt[] = { | |
2058 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2059 }; | |
2060 if (index < T_BOOLEAN || index > T_LONG) { | |
2061 verify_error(bci, "Illegal newarray instruction"); | |
2062 return VerificationType::bogus_type(); | |
2063 } | |
2064 | |
2065 // from_bt[index] contains the array signature which has a length of 2 | |
2066 symbolHandle sig = oopFactory::new_symbol_handle( | |
2067 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
2068 return VerificationType::reference_type(sig); | |
2069 } | |
2070 | |
2071 void ClassVerifier::verify_anewarray( | |
2072 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2073 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2074 current_frame->pop_stack( | |
2075 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2076 | |
2077 VerificationType component_type = | |
2078 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2079 ResourceMark rm(THREAD); | |
2080 int length; | |
2081 char* arr_sig_str; | |
2082 if (component_type.is_array()) { // it's an array | |
2083 const char* component_name = component_type.name()->as_utf8(); | |
2084 // add one dimension to component | |
2085 length = (int)strlen(component_name) + 1; | |
2086 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2087 arr_sig_str[0] = '['; | |
2088 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2089 } else { // it's an object or interface | |
2090 const char* component_name = component_type.name()->as_utf8(); | |
2091 // add one dimension to component with 'L' prepended and ';' postpended. | |
2092 length = (int)strlen(component_name) + 3; | |
2093 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2094 arr_sig_str[0] = '['; | |
2095 arr_sig_str[1] = 'L'; | |
2096 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2097 arr_sig_str[length - 1] = ';'; | |
2098 } | |
2099 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
2100 arr_sig_str, length, CHECK_VERIFY(this)); | |
2101 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2102 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2103 } | |
2104 | |
2105 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2106 current_frame->get_local( | |
2107 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2108 current_frame->push_stack( | |
2109 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2110 } | |
2111 | |
2112 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2113 current_frame->get_local_2( | |
2114 index, VerificationType::long_type(), | |
2115 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2116 current_frame->push_stack_2( | |
2117 VerificationType::long_type(), | |
2118 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2119 } | |
2120 | |
2121 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2122 current_frame->get_local( | |
2123 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2124 current_frame->push_stack( | |
2125 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2126 } | |
2127 | |
2128 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2129 current_frame->get_local_2( | |
2130 index, VerificationType::double_type(), | |
2131 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2132 current_frame->push_stack_2( | |
2133 VerificationType::double_type(), | |
2134 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2135 } | |
2136 | |
2137 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2138 VerificationType type = current_frame->get_local( | |
2139 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2140 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2141 } | |
2142 | |
2143 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2144 current_frame->pop_stack( | |
2145 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2146 current_frame->set_local( | |
2147 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2148 } | |
2149 | |
2150 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2151 current_frame->pop_stack_2( | |
2152 VerificationType::long2_type(), | |
2153 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2154 current_frame->set_local_2( | |
2155 index, VerificationType::long_type(), | |
2156 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2157 } | |
2158 | |
2159 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2160 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2161 current_frame->set_local( | |
2162 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2163 } | |
2164 | |
2165 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2166 current_frame->pop_stack_2( | |
2167 VerificationType::double2_type(), | |
2168 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2169 current_frame->set_local_2( | |
2170 index, VerificationType::double_type(), | |
2171 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2172 } | |
2173 | |
2174 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2175 VerificationType type = current_frame->pop_stack( | |
2176 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2177 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2178 } | |
2179 | |
2180 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2181 VerificationType type = current_frame->get_local( | |
2182 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2183 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2184 } | |
2185 | |
2186 void ClassVerifier::verify_return_value( | |
2187 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2188 if (return_type == VerificationType::bogus_type()) { | |
2189 verify_error(bci, "Method expects a return value"); | |
2190 return; | |
2191 } | |
2192 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
2193 if (!match) { | |
2194 verify_error(bci, "Bad return type"); | |
2195 return; | |
2196 } | |
2197 } |