Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/verifier.cpp @ 1458:dc114f680d9c
Merge.
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Sat, 13 Nov 2010 08:15:52 +0100 |
parents | 4ce7240d622c |
children | c18cbe5936b8 e40a3601bc1f ab102d5d923e |
rev | line source |
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0 | 1 /* |
844 | 2 * Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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 | |
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56 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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57 return (class_loader == NULL || !should_verify_class) ? |
0 | 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 | |
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71 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
0 | 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. | |
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84 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 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 | |
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144 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
0 | 145 symbolOop name = klass->name(); |
1142 | 146 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 147 |
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148 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 149 // return if the class is a bootstrapping class |
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150 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 151 // We need to skip the following four for bootstraping |
152 name != vmSymbols::java_lang_Object() && | |
153 name != vmSymbols::java_lang_Class() && | |
154 name != vmSymbols::java_lang_String() && | |
155 name != vmSymbols::java_lang_Throwable() && | |
156 | |
157 // Can not verify the bytecodes for shared classes because they have | |
158 // already been rewritten to contain constant pool cache indices, | |
159 // which the verifier can't understand. | |
160 // Shared classes shouldn't have stackmaps either. | |
161 !klass()->is_shared() && | |
162 | |
163 // As of the fix for 4486457 we disable verification for all of the | |
164 // dynamically-generated bytecodes associated with the 1.4 | |
165 // reflection implementation, not just those associated with | |
166 // sun/reflect/SerializationConstructorAccessor. | |
167 // NOTE: this is called too early in the bootstrapping process to be | |
168 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
169 (refl_magic_klass == NULL || | |
170 !klass->is_subtype_of(refl_magic_klass) || | |
171 VerifyReflectionBytecodes) | |
172 ); | |
173 } | |
174 | |
175 symbolHandle Verifier::inference_verify( | |
176 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { | |
177 JavaThread* thread = (JavaThread*)THREAD; | |
178 JNIEnv *env = thread->jni_environment(); | |
179 | |
180 void* verify_func = verify_byte_codes_fn(); | |
181 | |
182 if (verify_func == NULL) { | |
183 jio_snprintf(message, message_len, "Could not link verifier"); | |
184 return vmSymbols::java_lang_VerifyError(); | |
185 } | |
186 | |
187 ResourceMark rm(THREAD); | |
188 if (ClassVerifier::_verify_verbose) { | |
189 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
190 } | |
191 | |
192 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
193 jint result; | |
194 | |
195 { | |
196 HandleMark hm(thread); | |
197 ThreadToNativeFromVM ttn(thread); | |
198 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
199 // code knows that we have left the VM | |
200 | |
201 if (_is_new_verify_byte_codes_fn) { | |
202 verify_byte_codes_fn_new_t func = | |
203 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
204 result = (*func)(env, cls, message, (int)message_len, | |
205 klass->major_version()); | |
206 } else { | |
207 verify_byte_codes_fn_t func = | |
208 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
209 result = (*func)(env, cls, message, (int)message_len); | |
210 } | |
211 } | |
212 | |
213 JNIHandles::destroy_local(cls); | |
214 | |
215 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
216 // to be changed (still return jboolean (unsigned char)), and result is | |
217 // 1 when verification is passed. | |
218 symbolHandle nh(NULL); | |
219 if (result == 0) { | |
220 return vmSymbols::java_lang_VerifyError(); | |
221 } else if (result == 1) { | |
222 return nh; // verified. | |
223 } else if (result == 2) { | |
224 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); | |
225 } else if (result == 3) { | |
226 return vmSymbols::java_lang_ClassFormatError(); | |
227 } else { | |
228 ShouldNotReachHere(); | |
229 return nh; | |
230 } | |
231 } | |
232 | |
233 // Methods in ClassVerifier | |
234 | |
235 bool ClassVerifier::_verify_verbose = false; | |
236 | |
237 ClassVerifier::ClassVerifier( | |
238 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
239 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), | |
240 _message_buffer_len(msg_len), _klass(klass) { | |
241 _this_type = VerificationType::reference_type(klass->name()); | |
242 } | |
243 | |
244 ClassVerifier::~ClassVerifier() { | |
245 } | |
246 | |
247 void ClassVerifier::verify_class(TRAPS) { | |
248 if (_verify_verbose) { | |
249 tty->print_cr("Verifying class %s with new format", | |
250 _klass->external_name()); | |
251 } | |
252 | |
253 objArrayHandle methods(THREAD, _klass->methods()); | |
254 int num_methods = methods->length(); | |
255 | |
256 for (int index = 0; index < num_methods; index++) { | |
257 methodOop m = (methodOop)methods->obj_at(index); | |
258 if (m->is_native() || m->is_abstract()) { | |
259 // If m is native or abstract, skip it. It is checked in class file | |
260 // parser that methods do not override a final method. | |
261 continue; | |
262 } | |
263 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
264 } | |
265 } | |
266 | |
267 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
268 ResourceMark rm(THREAD); | |
269 _method = m; // initialize _method | |
270 if (_verify_verbose) { | |
271 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
272 } | |
273 | |
274 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
275 | |
276 int32_t max_stack = m->max_stack(); | |
277 int32_t max_locals = m->max_locals(); | |
278 constantPoolHandle cp(THREAD, m->constants()); | |
279 | |
280 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
281 class_format_error("Invalid method signature"); | |
282 return; | |
283 } | |
284 | |
285 // Initial stack map frame: offset is 0, stack is initially empty. | |
286 StackMapFrame current_frame(max_locals, max_stack, this); | |
287 // Set initial locals | |
288 VerificationType return_type = current_frame.set_locals_from_arg( | |
289 m, current_type(), CHECK_VERIFY(this)); | |
290 | |
291 int32_t stackmap_index = 0; // index to the stackmap array | |
292 | |
293 u4 code_length = m->code_size(); | |
294 | |
295 // Scan the bytecode and map each instruction's start offset to a number. | |
296 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
297 | |
298 int ex_min = code_length; | |
299 int ex_max = -1; | |
300 // Look through each item on the exception table. Each of the fields must refer | |
301 // to a legal instruction. | |
302 verify_exception_handler_table( | |
303 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
304 | |
305 // Look through each entry on the local variable table and make sure | |
306 // its range of code array offsets is valid. (4169817) | |
307 if (m->has_localvariable_table()) { | |
308 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
309 } | |
310 | |
311 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
312 StackMapStream stream(stackmap_data); | |
313 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
314 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
315 code_data, code_length, CHECK_VERIFY(this)); | |
316 | |
317 if (_verify_verbose) { | |
318 stackmap_table.print(); | |
319 } | |
320 | |
321 RawBytecodeStream bcs(m); | |
322 | |
323 // Scan the byte code linearly from the start to the end | |
324 bool no_control_flow = false; // Set to true when there is no direct control | |
325 // flow from current instruction to the next | |
326 // instruction in sequence | |
327 Bytecodes::Code opcode; | |
328 while (!bcs.is_last_bytecode()) { | |
329 opcode = bcs.raw_next(); | |
330 u2 bci = bcs.bci(); | |
331 | |
332 // Set current frame's offset to bci | |
333 current_frame.set_offset(bci); | |
334 | |
335 // Make sure every offset in stackmap table point to the beginning to | |
336 // an instruction. Match current_frame to stackmap_table entry with | |
337 // the same offset if exists. | |
338 stackmap_index = verify_stackmap_table( | |
339 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
340 no_control_flow, CHECK_VERIFY(this)); | |
341 | |
342 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
343 | |
344 // Merge with the next instruction | |
345 { | |
346 u2 index; | |
347 int target; | |
348 VerificationType type, type2; | |
349 VerificationType atype; | |
350 | |
351 #ifndef PRODUCT | |
352 if (_verify_verbose) { | |
353 current_frame.print(); | |
354 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
355 } | |
356 #endif | |
357 | |
358 // Make sure wide instruction is in correct format | |
359 if (bcs.is_wide()) { | |
360 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
361 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
362 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
363 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
364 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
365 opcode != Bytecodes::_dstore) { | |
366 verify_error(bci, "Bad wide instruction"); | |
367 return; | |
368 } | |
369 } | |
370 | |
371 switch (opcode) { | |
372 case Bytecodes::_nop : | |
373 no_control_flow = false; break; | |
374 case Bytecodes::_aconst_null : | |
375 current_frame.push_stack( | |
376 VerificationType::null_type(), CHECK_VERIFY(this)); | |
377 no_control_flow = false; break; | |
378 case Bytecodes::_iconst_m1 : | |
379 case Bytecodes::_iconst_0 : | |
380 case Bytecodes::_iconst_1 : | |
381 case Bytecodes::_iconst_2 : | |
382 case Bytecodes::_iconst_3 : | |
383 case Bytecodes::_iconst_4 : | |
384 case Bytecodes::_iconst_5 : | |
385 current_frame.push_stack( | |
386 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
387 no_control_flow = false; break; | |
388 case Bytecodes::_lconst_0 : | |
389 case Bytecodes::_lconst_1 : | |
390 current_frame.push_stack_2( | |
391 VerificationType::long_type(), | |
392 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
393 no_control_flow = false; break; | |
394 case Bytecodes::_fconst_0 : | |
395 case Bytecodes::_fconst_1 : | |
396 case Bytecodes::_fconst_2 : | |
397 current_frame.push_stack( | |
398 VerificationType::float_type(), CHECK_VERIFY(this)); | |
399 no_control_flow = false; break; | |
400 case Bytecodes::_dconst_0 : | |
401 case Bytecodes::_dconst_1 : | |
402 current_frame.push_stack_2( | |
403 VerificationType::double_type(), | |
404 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
405 no_control_flow = false; break; | |
406 case Bytecodes::_sipush : | |
407 case Bytecodes::_bipush : | |
408 current_frame.push_stack( | |
409 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
410 no_control_flow = false; break; | |
411 case Bytecodes::_ldc : | |
412 verify_ldc( | |
413 opcode, bcs.get_index(), ¤t_frame, | |
414 cp, bci, CHECK_VERIFY(this)); | |
415 no_control_flow = false; break; | |
416 case Bytecodes::_ldc_w : | |
417 case Bytecodes::_ldc2_w : | |
418 verify_ldc( | |
419 opcode, bcs.get_index_big(), ¤t_frame, | |
420 cp, bci, CHECK_VERIFY(this)); | |
421 no_control_flow = false; break; | |
422 case Bytecodes::_iload : | |
423 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
424 no_control_flow = false; break; | |
425 case Bytecodes::_iload_0 : | |
426 case Bytecodes::_iload_1 : | |
427 case Bytecodes::_iload_2 : | |
428 case Bytecodes::_iload_3 : | |
429 index = opcode - Bytecodes::_iload_0; | |
430 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
431 no_control_flow = false; break; | |
432 case Bytecodes::_lload : | |
433 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
434 no_control_flow = false; break; | |
435 case Bytecodes::_lload_0 : | |
436 case Bytecodes::_lload_1 : | |
437 case Bytecodes::_lload_2 : | |
438 case Bytecodes::_lload_3 : | |
439 index = opcode - Bytecodes::_lload_0; | |
440 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
441 no_control_flow = false; break; | |
442 case Bytecodes::_fload : | |
443 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
444 no_control_flow = false; break; | |
445 case Bytecodes::_fload_0 : | |
446 case Bytecodes::_fload_1 : | |
447 case Bytecodes::_fload_2 : | |
448 case Bytecodes::_fload_3 : | |
449 index = opcode - Bytecodes::_fload_0; | |
450 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
451 no_control_flow = false; break; | |
452 case Bytecodes::_dload : | |
453 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
454 no_control_flow = false; break; | |
455 case Bytecodes::_dload_0 : | |
456 case Bytecodes::_dload_1 : | |
457 case Bytecodes::_dload_2 : | |
458 case Bytecodes::_dload_3 : | |
459 index = opcode - Bytecodes::_dload_0; | |
460 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
461 no_control_flow = false; break; | |
462 case Bytecodes::_aload : | |
463 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
464 no_control_flow = false; break; | |
465 case Bytecodes::_aload_0 : | |
466 case Bytecodes::_aload_1 : | |
467 case Bytecodes::_aload_2 : | |
468 case Bytecodes::_aload_3 : | |
469 index = opcode - Bytecodes::_aload_0; | |
470 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
471 no_control_flow = false; break; | |
472 case Bytecodes::_iaload : | |
473 type = current_frame.pop_stack( | |
474 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
475 atype = current_frame.pop_stack( | |
476 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
477 if (!atype.is_int_array()) { | |
478 verify_error(bci, bad_type_msg, "iaload"); | |
479 return; | |
480 } | |
481 current_frame.push_stack( | |
482 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
483 no_control_flow = false; break; | |
484 case Bytecodes::_baload : | |
485 type = current_frame.pop_stack( | |
486 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
487 atype = current_frame.pop_stack( | |
488 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
489 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
490 verify_error(bci, bad_type_msg, "baload"); | |
491 return; | |
492 } | |
493 current_frame.push_stack( | |
494 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
495 no_control_flow = false; break; | |
496 case Bytecodes::_caload : | |
497 type = current_frame.pop_stack( | |
498 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
499 atype = current_frame.pop_stack( | |
500 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
501 if (!atype.is_char_array()) { | |
502 verify_error(bci, bad_type_msg, "caload"); | |
503 return; | |
504 } | |
505 current_frame.push_stack( | |
506 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
507 no_control_flow = false; break; | |
508 case Bytecodes::_saload : | |
509 type = current_frame.pop_stack( | |
510 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
511 atype = current_frame.pop_stack( | |
512 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
513 if (!atype.is_short_array()) { | |
514 verify_error(bci, bad_type_msg, "saload"); | |
515 return; | |
516 } | |
517 current_frame.push_stack( | |
518 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
519 no_control_flow = false; break; | |
520 case Bytecodes::_laload : | |
521 type = current_frame.pop_stack( | |
522 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
523 atype = current_frame.pop_stack( | |
524 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
525 if (!atype.is_long_array()) { | |
526 verify_error(bci, bad_type_msg, "laload"); | |
527 return; | |
528 } | |
529 current_frame.push_stack_2( | |
530 VerificationType::long_type(), | |
531 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
532 no_control_flow = false; break; | |
533 case Bytecodes::_faload : | |
534 type = current_frame.pop_stack( | |
535 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
536 atype = current_frame.pop_stack( | |
537 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
538 if (!atype.is_float_array()) { | |
539 verify_error(bci, bad_type_msg, "faload"); | |
540 return; | |
541 } | |
542 current_frame.push_stack( | |
543 VerificationType::float_type(), CHECK_VERIFY(this)); | |
544 no_control_flow = false; break; | |
545 case Bytecodes::_daload : | |
546 type = current_frame.pop_stack( | |
547 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
548 atype = current_frame.pop_stack( | |
549 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
550 if (!atype.is_double_array()) { | |
551 verify_error(bci, bad_type_msg, "daload"); | |
552 return; | |
553 } | |
554 current_frame.push_stack_2( | |
555 VerificationType::double_type(), | |
556 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
557 no_control_flow = false; break; | |
558 case Bytecodes::_aaload : { | |
559 type = current_frame.pop_stack( | |
560 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
561 atype = current_frame.pop_stack( | |
562 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
563 if (!atype.is_reference_array()) { | |
564 verify_error(bci, bad_type_msg, "aaload"); | |
565 return; | |
566 } | |
567 if (atype.is_null()) { | |
568 current_frame.push_stack( | |
569 VerificationType::null_type(), CHECK_VERIFY(this)); | |
570 } else { | |
571 VerificationType component = | |
572 atype.get_component(CHECK_VERIFY(this)); | |
573 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
574 } | |
575 no_control_flow = false; break; | |
576 } | |
577 case Bytecodes::_istore : | |
578 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
579 no_control_flow = false; break; | |
580 case Bytecodes::_istore_0 : | |
581 case Bytecodes::_istore_1 : | |
582 case Bytecodes::_istore_2 : | |
583 case Bytecodes::_istore_3 : | |
584 index = opcode - Bytecodes::_istore_0; | |
585 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
586 no_control_flow = false; break; | |
587 case Bytecodes::_lstore : | |
588 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
589 no_control_flow = false; break; | |
590 case Bytecodes::_lstore_0 : | |
591 case Bytecodes::_lstore_1 : | |
592 case Bytecodes::_lstore_2 : | |
593 case Bytecodes::_lstore_3 : | |
594 index = opcode - Bytecodes::_lstore_0; | |
595 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
596 no_control_flow = false; break; | |
597 case Bytecodes::_fstore : | |
598 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
599 no_control_flow = false; break; | |
600 case Bytecodes::_fstore_0 : | |
601 case Bytecodes::_fstore_1 : | |
602 case Bytecodes::_fstore_2 : | |
603 case Bytecodes::_fstore_3 : | |
604 index = opcode - Bytecodes::_fstore_0; | |
605 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
606 no_control_flow = false; break; | |
607 case Bytecodes::_dstore : | |
608 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
609 no_control_flow = false; break; | |
610 case Bytecodes::_dstore_0 : | |
611 case Bytecodes::_dstore_1 : | |
612 case Bytecodes::_dstore_2 : | |
613 case Bytecodes::_dstore_3 : | |
614 index = opcode - Bytecodes::_dstore_0; | |
615 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
616 no_control_flow = false; break; | |
617 case Bytecodes::_astore : | |
618 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
619 no_control_flow = false; break; | |
620 case Bytecodes::_astore_0 : | |
621 case Bytecodes::_astore_1 : | |
622 case Bytecodes::_astore_2 : | |
623 case Bytecodes::_astore_3 : | |
624 index = opcode - Bytecodes::_astore_0; | |
625 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
626 no_control_flow = false; break; | |
627 case Bytecodes::_iastore : | |
628 type = current_frame.pop_stack( | |
629 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
630 type2 = current_frame.pop_stack( | |
631 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
632 atype = current_frame.pop_stack( | |
633 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
634 if (!atype.is_int_array()) { | |
635 verify_error(bci, bad_type_msg, "iastore"); | |
636 return; | |
637 } | |
638 no_control_flow = false; break; | |
639 case Bytecodes::_bastore : | |
640 type = current_frame.pop_stack( | |
641 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
642 type2 = current_frame.pop_stack( | |
643 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
644 atype = current_frame.pop_stack( | |
645 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
646 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
647 verify_error(bci, bad_type_msg, "bastore"); | |
648 return; | |
649 } | |
650 no_control_flow = false; break; | |
651 case Bytecodes::_castore : | |
652 current_frame.pop_stack( | |
653 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
654 current_frame.pop_stack( | |
655 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
656 atype = current_frame.pop_stack( | |
657 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
658 if (!atype.is_char_array()) { | |
659 verify_error(bci, bad_type_msg, "castore"); | |
660 return; | |
661 } | |
662 no_control_flow = false; break; | |
663 case Bytecodes::_sastore : | |
664 current_frame.pop_stack( | |
665 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
666 current_frame.pop_stack( | |
667 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
668 atype = current_frame.pop_stack( | |
669 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
670 if (!atype.is_short_array()) { | |
671 verify_error(bci, bad_type_msg, "sastore"); | |
672 return; | |
673 } | |
674 no_control_flow = false; break; | |
675 case Bytecodes::_lastore : | |
676 current_frame.pop_stack_2( | |
677 VerificationType::long2_type(), | |
678 VerificationType::long_type(), CHECK_VERIFY(this)); | |
679 current_frame.pop_stack( | |
680 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
681 atype = current_frame.pop_stack( | |
682 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
683 if (!atype.is_long_array()) { | |
684 verify_error(bci, bad_type_msg, "lastore"); | |
685 return; | |
686 } | |
687 no_control_flow = false; break; | |
688 case Bytecodes::_fastore : | |
689 current_frame.pop_stack( | |
690 VerificationType::float_type(), CHECK_VERIFY(this)); | |
691 current_frame.pop_stack | |
692 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
693 atype = current_frame.pop_stack( | |
694 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
695 if (!atype.is_float_array()) { | |
696 verify_error(bci, bad_type_msg, "fastore"); | |
697 return; | |
698 } | |
699 no_control_flow = false; break; | |
700 case Bytecodes::_dastore : | |
701 current_frame.pop_stack_2( | |
702 VerificationType::double2_type(), | |
703 VerificationType::double_type(), CHECK_VERIFY(this)); | |
704 current_frame.pop_stack( | |
705 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
706 atype = current_frame.pop_stack( | |
707 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
708 if (!atype.is_double_array()) { | |
709 verify_error(bci, bad_type_msg, "dastore"); | |
710 return; | |
711 } | |
712 no_control_flow = false; break; | |
713 case Bytecodes::_aastore : | |
714 type = current_frame.pop_stack( | |
715 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
716 type2 = current_frame.pop_stack( | |
717 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
718 atype = current_frame.pop_stack( | |
719 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
720 // more type-checking is done at runtime | |
721 if (!atype.is_reference_array()) { | |
722 verify_error(bci, bad_type_msg, "aastore"); | |
723 return; | |
724 } | |
725 // 4938384: relaxed constraint in JVMS 3nd edition. | |
726 no_control_flow = false; break; | |
727 case Bytecodes::_pop : | |
728 current_frame.pop_stack( | |
729 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
730 no_control_flow = false; break; | |
731 case Bytecodes::_pop2 : | |
732 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
733 if (type.is_category1()) { | |
734 current_frame.pop_stack( | |
735 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
736 } else if (type.is_category2_2nd()) { | |
737 current_frame.pop_stack( | |
738 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
739 } else { | |
740 verify_error(bci, bad_type_msg, "pop2"); | |
741 return; | |
742 } | |
743 no_control_flow = false; break; | |
744 case Bytecodes::_dup : | |
745 type = current_frame.pop_stack( | |
746 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
747 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
748 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
749 no_control_flow = false; break; | |
750 case Bytecodes::_dup_x1 : | |
751 type = current_frame.pop_stack( | |
752 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
753 type2 = current_frame.pop_stack( | |
754 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
755 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
756 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
757 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
758 no_control_flow = false; break; | |
759 case Bytecodes::_dup_x2 : | |
760 { | |
761 VerificationType type3; | |
762 type = current_frame.pop_stack( | |
763 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
764 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
765 if (type2.is_category1()) { | |
766 type3 = current_frame.pop_stack( | |
767 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
768 } else if (type2.is_category2_2nd()) { | |
769 type3 = current_frame.pop_stack( | |
770 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
771 } else { | |
772 verify_error(bci, bad_type_msg, "dup_x2"); | |
773 return; | |
774 } | |
775 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
776 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
777 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
778 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
779 no_control_flow = false; break; | |
780 } | |
781 case Bytecodes::_dup2 : | |
782 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
783 if (type.is_category1()) { | |
784 type2 = current_frame.pop_stack( | |
785 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
786 } else if (type.is_category2_2nd()) { | |
787 type2 = current_frame.pop_stack( | |
788 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
789 } else { | |
790 verify_error(bci, bad_type_msg, "dup2"); | |
791 return; | |
792 } | |
793 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
794 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
795 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
796 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
797 no_control_flow = false; break; | |
798 case Bytecodes::_dup2_x1 : | |
799 { | |
800 VerificationType type3; | |
801 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
802 if (type.is_category1()) { | |
803 type2 = current_frame.pop_stack( | |
804 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
805 } else if(type.is_category2_2nd()) { | |
806 type2 = current_frame.pop_stack | |
807 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
808 } else { | |
809 verify_error(bci, bad_type_msg, "dup2_x1"); | |
810 return; | |
811 } | |
812 type3 = current_frame.pop_stack( | |
813 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
814 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
815 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
816 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
817 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
818 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
819 no_control_flow = false; break; | |
820 } | |
821 case Bytecodes::_dup2_x2 : | |
822 { | |
823 VerificationType type3, type4; | |
824 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
825 if (type.is_category1()) { | |
826 type2 = current_frame.pop_stack( | |
827 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
828 } else if (type.is_category2_2nd()) { | |
829 type2 = current_frame.pop_stack( | |
830 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
831 } else { | |
832 verify_error(bci, bad_type_msg, "dup2_x2"); | |
833 return; | |
834 } | |
835 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
836 if (type3.is_category1()) { | |
837 type4 = current_frame.pop_stack( | |
838 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
839 } else if (type3.is_category2_2nd()) { | |
840 type4 = current_frame.pop_stack( | |
841 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
842 } else { | |
843 verify_error(bci, bad_type_msg, "dup2_x2"); | |
844 return; | |
845 } | |
846 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
847 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
848 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
849 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
850 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
851 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
852 no_control_flow = false; break; | |
853 } | |
854 case Bytecodes::_swap : | |
855 type = current_frame.pop_stack( | |
856 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
857 type2 = current_frame.pop_stack( | |
858 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
859 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
860 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
861 no_control_flow = false; break; | |
862 case Bytecodes::_iadd : | |
863 case Bytecodes::_isub : | |
864 case Bytecodes::_imul : | |
865 case Bytecodes::_idiv : | |
866 case Bytecodes::_irem : | |
867 case Bytecodes::_ishl : | |
868 case Bytecodes::_ishr : | |
869 case Bytecodes::_iushr : | |
870 case Bytecodes::_ior : | |
871 case Bytecodes::_ixor : | |
872 case Bytecodes::_iand : | |
873 current_frame.pop_stack( | |
874 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
875 // fall through | |
876 case Bytecodes::_ineg : | |
877 current_frame.pop_stack( | |
878 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
879 current_frame.push_stack( | |
880 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
881 no_control_flow = false; break; | |
882 case Bytecodes::_ladd : | |
883 case Bytecodes::_lsub : | |
884 case Bytecodes::_lmul : | |
885 case Bytecodes::_ldiv : | |
886 case Bytecodes::_lrem : | |
887 case Bytecodes::_land : | |
888 case Bytecodes::_lor : | |
889 case Bytecodes::_lxor : | |
890 current_frame.pop_stack_2( | |
891 VerificationType::long2_type(), | |
892 VerificationType::long_type(), CHECK_VERIFY(this)); | |
893 // fall through | |
894 case Bytecodes::_lneg : | |
895 current_frame.pop_stack_2( | |
896 VerificationType::long2_type(), | |
897 VerificationType::long_type(), CHECK_VERIFY(this)); | |
898 current_frame.push_stack_2( | |
899 VerificationType::long_type(), | |
900 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
901 no_control_flow = false; break; | |
902 case Bytecodes::_lshl : | |
903 case Bytecodes::_lshr : | |
904 case Bytecodes::_lushr : | |
905 current_frame.pop_stack( | |
906 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
907 current_frame.pop_stack_2( | |
908 VerificationType::long2_type(), | |
909 VerificationType::long_type(), CHECK_VERIFY(this)); | |
910 current_frame.push_stack_2( | |
911 VerificationType::long_type(), | |
912 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
913 no_control_flow = false; break; | |
914 case Bytecodes::_fadd : | |
915 case Bytecodes::_fsub : | |
916 case Bytecodes::_fmul : | |
917 case Bytecodes::_fdiv : | |
918 case Bytecodes::_frem : | |
919 current_frame.pop_stack( | |
920 VerificationType::float_type(), CHECK_VERIFY(this)); | |
921 // fall through | |
922 case Bytecodes::_fneg : | |
923 current_frame.pop_stack( | |
924 VerificationType::float_type(), CHECK_VERIFY(this)); | |
925 current_frame.push_stack( | |
926 VerificationType::float_type(), CHECK_VERIFY(this)); | |
927 no_control_flow = false; break; | |
928 case Bytecodes::_dadd : | |
929 case Bytecodes::_dsub : | |
930 case Bytecodes::_dmul : | |
931 case Bytecodes::_ddiv : | |
932 case Bytecodes::_drem : | |
933 current_frame.pop_stack_2( | |
934 VerificationType::double2_type(), | |
935 VerificationType::double_type(), CHECK_VERIFY(this)); | |
936 // fall through | |
937 case Bytecodes::_dneg : | |
938 current_frame.pop_stack_2( | |
939 VerificationType::double2_type(), | |
940 VerificationType::double_type(), CHECK_VERIFY(this)); | |
941 current_frame.push_stack_2( | |
942 VerificationType::double_type(), | |
943 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
944 no_control_flow = false; break; | |
945 case Bytecodes::_iinc : | |
946 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
947 no_control_flow = false; break; | |
948 case Bytecodes::_i2l : | |
949 type = current_frame.pop_stack( | |
950 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
951 current_frame.push_stack_2( | |
952 VerificationType::long_type(), | |
953 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
954 no_control_flow = false; break; | |
955 case Bytecodes::_l2i : | |
956 current_frame.pop_stack_2( | |
957 VerificationType::long2_type(), | |
958 VerificationType::long_type(), CHECK_VERIFY(this)); | |
959 current_frame.push_stack( | |
960 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
961 no_control_flow = false; break; | |
962 case Bytecodes::_i2f : | |
963 current_frame.pop_stack( | |
964 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
965 current_frame.push_stack( | |
966 VerificationType::float_type(), CHECK_VERIFY(this)); | |
967 no_control_flow = false; break; | |
968 case Bytecodes::_i2d : | |
969 current_frame.pop_stack( | |
970 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
971 current_frame.push_stack_2( | |
972 VerificationType::double_type(), | |
973 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
974 no_control_flow = false; break; | |
975 case Bytecodes::_l2f : | |
976 current_frame.pop_stack_2( | |
977 VerificationType::long2_type(), | |
978 VerificationType::long_type(), CHECK_VERIFY(this)); | |
979 current_frame.push_stack( | |
980 VerificationType::float_type(), CHECK_VERIFY(this)); | |
981 no_control_flow = false; break; | |
982 case Bytecodes::_l2d : | |
983 current_frame.pop_stack_2( | |
984 VerificationType::long2_type(), | |
985 VerificationType::long_type(), CHECK_VERIFY(this)); | |
986 current_frame.push_stack_2( | |
987 VerificationType::double_type(), | |
988 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
989 no_control_flow = false; break; | |
990 case Bytecodes::_f2i : | |
991 current_frame.pop_stack( | |
992 VerificationType::float_type(), CHECK_VERIFY(this)); | |
993 current_frame.push_stack( | |
994 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
995 no_control_flow = false; break; | |
996 case Bytecodes::_f2l : | |
997 current_frame.pop_stack( | |
998 VerificationType::float_type(), CHECK_VERIFY(this)); | |
999 current_frame.push_stack_2( | |
1000 VerificationType::long_type(), | |
1001 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1002 no_control_flow = false; break; | |
1003 case Bytecodes::_f2d : | |
1004 current_frame.pop_stack( | |
1005 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1006 current_frame.push_stack_2( | |
1007 VerificationType::double_type(), | |
1008 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1009 no_control_flow = false; break; | |
1010 case Bytecodes::_d2i : | |
1011 current_frame.pop_stack_2( | |
1012 VerificationType::double2_type(), | |
1013 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1014 current_frame.push_stack( | |
1015 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1016 no_control_flow = false; break; | |
1017 case Bytecodes::_d2l : | |
1018 current_frame.pop_stack_2( | |
1019 VerificationType::double2_type(), | |
1020 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1021 current_frame.push_stack_2( | |
1022 VerificationType::long_type(), | |
1023 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1024 no_control_flow = false; break; | |
1025 case Bytecodes::_d2f : | |
1026 current_frame.pop_stack_2( | |
1027 VerificationType::double2_type(), | |
1028 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1029 current_frame.push_stack( | |
1030 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1031 no_control_flow = false; break; | |
1032 case Bytecodes::_i2b : | |
1033 case Bytecodes::_i2c : | |
1034 case Bytecodes::_i2s : | |
1035 current_frame.pop_stack( | |
1036 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1037 current_frame.push_stack( | |
1038 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1039 no_control_flow = false; break; | |
1040 case Bytecodes::_lcmp : | |
1041 current_frame.pop_stack_2( | |
1042 VerificationType::long2_type(), | |
1043 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1044 current_frame.pop_stack_2( | |
1045 VerificationType::long2_type(), | |
1046 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1047 current_frame.push_stack( | |
1048 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1049 no_control_flow = false; break; | |
1050 case Bytecodes::_fcmpl : | |
1051 case Bytecodes::_fcmpg : | |
1052 current_frame.pop_stack( | |
1053 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1054 current_frame.pop_stack( | |
1055 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1056 current_frame.push_stack( | |
1057 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1058 no_control_flow = false; break; | |
1059 case Bytecodes::_dcmpl : | |
1060 case Bytecodes::_dcmpg : | |
1061 current_frame.pop_stack_2( | |
1062 VerificationType::double2_type(), | |
1063 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1064 current_frame.pop_stack_2( | |
1065 VerificationType::double2_type(), | |
1066 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1067 current_frame.push_stack( | |
1068 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1069 no_control_flow = false; break; | |
1070 case Bytecodes::_if_icmpeq: | |
1071 case Bytecodes::_if_icmpne: | |
1072 case Bytecodes::_if_icmplt: | |
1073 case Bytecodes::_if_icmpge: | |
1074 case Bytecodes::_if_icmpgt: | |
1075 case Bytecodes::_if_icmple: | |
1076 current_frame.pop_stack( | |
1077 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1078 // fall through | |
1079 case Bytecodes::_ifeq: | |
1080 case Bytecodes::_ifne: | |
1081 case Bytecodes::_iflt: | |
1082 case Bytecodes::_ifge: | |
1083 case Bytecodes::_ifgt: | |
1084 case Bytecodes::_ifle: | |
1085 current_frame.pop_stack( | |
1086 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1087 target = bcs.dest(); | |
1088 stackmap_table.check_jump_target( | |
1089 ¤t_frame, target, CHECK_VERIFY(this)); | |
1090 no_control_flow = false; break; | |
1091 case Bytecodes::_if_acmpeq : | |
1092 case Bytecodes::_if_acmpne : | |
1093 current_frame.pop_stack( | |
1094 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1095 // fall through | |
1096 case Bytecodes::_ifnull : | |
1097 case Bytecodes::_ifnonnull : | |
1098 current_frame.pop_stack( | |
1099 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1100 target = bcs.dest(); | |
1101 stackmap_table.check_jump_target | |
1102 (¤t_frame, target, CHECK_VERIFY(this)); | |
1103 no_control_flow = false; break; | |
1104 case Bytecodes::_goto : | |
1105 target = bcs.dest(); | |
1106 stackmap_table.check_jump_target( | |
1107 ¤t_frame, target, CHECK_VERIFY(this)); | |
1108 no_control_flow = true; break; | |
1109 case Bytecodes::_goto_w : | |
1110 target = bcs.dest_w(); | |
1111 stackmap_table.check_jump_target( | |
1112 ¤t_frame, target, CHECK_VERIFY(this)); | |
1113 no_control_flow = true; break; | |
1114 case Bytecodes::_tableswitch : | |
1115 case Bytecodes::_lookupswitch : | |
1116 verify_switch( | |
1117 &bcs, code_length, code_data, ¤t_frame, | |
1118 &stackmap_table, CHECK_VERIFY(this)); | |
1119 no_control_flow = true; break; | |
1120 case Bytecodes::_ireturn : | |
1121 type = current_frame.pop_stack( | |
1122 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1123 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1124 no_control_flow = true; break; | |
1125 case Bytecodes::_lreturn : | |
1126 type2 = current_frame.pop_stack( | |
1127 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1128 type = current_frame.pop_stack( | |
1129 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1130 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1131 no_control_flow = true; break; | |
1132 case Bytecodes::_freturn : | |
1133 type = current_frame.pop_stack( | |
1134 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1135 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1136 no_control_flow = true; break; | |
1137 case Bytecodes::_dreturn : | |
1138 type2 = current_frame.pop_stack( | |
1139 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1140 type = current_frame.pop_stack( | |
1141 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1142 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1143 no_control_flow = true; break; | |
1144 case Bytecodes::_areturn : | |
1145 type = current_frame.pop_stack( | |
1146 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1147 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1148 no_control_flow = true; break; | |
1149 case Bytecodes::_return : | |
1150 if (return_type != VerificationType::bogus_type()) { | |
1151 verify_error(bci, "Method expects no return value"); | |
1152 return; | |
1153 } | |
1154 // Make sure "this" has been initialized if current method is an | |
1155 // <init> | |
1156 if (_method->name() == vmSymbols::object_initializer_name() && | |
1157 current_frame.flag_this_uninit()) { | |
1158 verify_error(bci, | |
1159 "Constructor must call super() or this() before return"); | |
1160 return; | |
1161 } | |
1162 no_control_flow = true; break; | |
1163 case Bytecodes::_getstatic : | |
1164 case Bytecodes::_putstatic : | |
1165 case Bytecodes::_getfield : | |
1166 case Bytecodes::_putfield : | |
1167 verify_field_instructions( | |
1168 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1169 no_control_flow = false; break; | |
1170 case Bytecodes::_invokevirtual : | |
1171 case Bytecodes::_invokespecial : | |
1172 case Bytecodes::_invokestatic : | |
1173 verify_invoke_instructions( | |
1174 &bcs, code_length, ¤t_frame, | |
1175 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1176 no_control_flow = false; break; | |
1177 case Bytecodes::_invokeinterface : | |
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1178 case Bytecodes::_invokedynamic : |
0 | 1179 verify_invoke_instructions( |
1180 &bcs, code_length, ¤t_frame, | |
1181 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1182 no_control_flow = false; break; | |
1183 case Bytecodes::_new : | |
1184 { | |
1185 index = bcs.get_index_big(); | |
1186 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1187 VerificationType new_class_type = | |
1188 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1189 if (!new_class_type.is_object()) { | |
1190 verify_error(bci, "Illegal new instruction"); | |
1191 return; | |
1192 } | |
1193 type = VerificationType::uninitialized_type(bci); | |
1194 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1195 no_control_flow = false; break; | |
1196 } | |
1197 case Bytecodes::_newarray : | |
1198 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1199 current_frame.pop_stack( | |
1200 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1201 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1202 no_control_flow = false; break; | |
1203 case Bytecodes::_anewarray : | |
1204 verify_anewarray( | |
1205 bcs.get_index_big(), cp, ¤t_frame, CHECK_VERIFY(this)); | |
1206 no_control_flow = false; break; | |
1207 case Bytecodes::_arraylength : | |
1208 type = current_frame.pop_stack( | |
1209 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1210 if (!(type.is_null() || type.is_array())) { |
0 | 1211 verify_error(bci, bad_type_msg, "arraylength"); |
1212 } | |
1213 current_frame.push_stack( | |
1214 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1215 no_control_flow = false; break; | |
1216 case Bytecodes::_checkcast : | |
1217 { | |
1218 index = bcs.get_index_big(); | |
1219 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1220 current_frame.pop_stack( | |
1221 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1222 VerificationType klass_type = cp_index_to_type( | |
1223 index, cp, CHECK_VERIFY(this)); | |
1224 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1225 no_control_flow = false; break; | |
1226 } | |
1227 case Bytecodes::_instanceof : { | |
1228 index = bcs.get_index_big(); | |
1229 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1230 current_frame.pop_stack( | |
1231 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1232 current_frame.push_stack( | |
1233 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1234 no_control_flow = false; break; | |
1235 } | |
1236 case Bytecodes::_monitorenter : | |
1237 case Bytecodes::_monitorexit : | |
1238 current_frame.pop_stack( | |
1239 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1240 no_control_flow = false; break; | |
1241 case Bytecodes::_multianewarray : | |
1242 { | |
1243 index = bcs.get_index_big(); | |
1244 u2 dim = *(bcs.bcp()+3); | |
1245 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1246 VerificationType new_array_type = | |
1247 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1248 if (!new_array_type.is_array()) { | |
1249 verify_error(bci, | |
1250 "Illegal constant pool index in multianewarray instruction"); | |
1251 return; | |
1252 } | |
1253 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1254 verify_error(bci, | |
1255 "Illegal dimension in multianewarray instruction"); | |
1256 return; | |
1257 } | |
1258 for (int i = 0; i < dim; i++) { | |
1259 current_frame.pop_stack( | |
1260 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1261 } | |
1262 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1263 no_control_flow = false; break; | |
1264 } | |
1265 case Bytecodes::_athrow : | |
1266 type = VerificationType::reference_type( | |
1267 vmSymbols::java_lang_Throwable()); | |
1268 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1269 no_control_flow = true; break; | |
1270 default: | |
1271 // We only need to check the valid bytecodes in class file. | |
1272 // And jsr and ret are not in the new class file format in JDK1.5. | |
1273 verify_error(bci, "Bad instruction"); | |
1274 no_control_flow = false; | |
1275 return; | |
1276 } // end switch | |
1277 } // end Merge with the next instruction | |
1278 | |
1279 // Look for possible jump target in exception handlers and see if it | |
1280 // matches current_frame | |
1281 if (bci >= ex_min && bci < ex_max) { | |
1282 verify_exception_handler_targets( | |
1283 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1284 } | |
1285 } // end while | |
1286 | |
1287 // Make sure that control flow does not fall through end of the method | |
1288 if (!no_control_flow) { | |
1289 verify_error(code_length, "Control flow falls through code end"); | |
1290 return; | |
1291 } | |
1292 } | |
1293 | |
1294 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1295 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1296 memset(code_data, 0, sizeof(char) * code_length); | |
1297 RawBytecodeStream bcs(m); | |
1298 | |
1299 while (!bcs.is_last_bytecode()) { | |
1300 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1301 int bci = bcs.bci(); | |
1302 if (bcs.code() == Bytecodes::_new) { | |
1303 code_data[bci] = NEW_OFFSET; | |
1304 } else { | |
1305 code_data[bci] = BYTECODE_OFFSET; | |
1306 } | |
1307 } else { | |
1308 verify_error(bcs.bci(), "Bad instruction"); | |
1309 return NULL; | |
1310 } | |
1311 } | |
1312 | |
1313 return code_data; | |
1314 } | |
1315 | |
1316 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1317 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1318 constantPoolHandle cp (THREAD, _method->constants()); | |
1319 | |
1320 if (exhandlers() != NULL) { | |
1321 for(int i = 0; i < exhandlers->length();) { | |
1322 u2 start_pc = exhandlers->int_at(i++); | |
1323 u2 end_pc = exhandlers->int_at(i++); | |
1324 u2 handler_pc = exhandlers->int_at(i++); | |
1325 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1326 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1327 return; | |
1328 } | |
1329 if (end_pc != code_length) { // special case: end_pc == code_length | |
1330 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1331 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1332 return; | |
1333 } | |
1334 } | |
1335 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1336 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1337 return; | |
1338 } | |
1339 int catch_type_index = exhandlers->int_at(i++); | |
1340 if (catch_type_index != 0) { | |
1341 VerificationType catch_type = cp_index_to_type( | |
1342 catch_type_index, cp, CHECK_VERIFY(this)); | |
1343 VerificationType throwable = | |
1344 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1345 bool is_subclass = throwable.is_assignable_from( | |
1346 catch_type, current_class(), CHECK_VERIFY(this)); | |
1347 if (!is_subclass) { | |
1348 // 4286534: should throw VerifyError according to recent spec change | |
1349 verify_error( | |
1350 "Catch type is not a subclass of Throwable in handler %d", | |
1351 handler_pc); | |
1352 return; | |
1353 } | |
1354 } | |
1355 if (start_pc < min) min = start_pc; | |
1356 if (end_pc > max) max = end_pc; | |
1357 } | |
1358 } | |
1359 } | |
1360 | |
1361 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1362 int localvariable_table_length = _method()->localvariable_table_length(); | |
1363 if (localvariable_table_length > 0) { | |
1364 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1365 for (int i = 0; i < localvariable_table_length; i++) { | |
1366 u2 start_bci = table[i].start_bci; | |
1367 u2 length = table[i].length; | |
1368 | |
1369 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1370 class_format_error( | |
1371 "Illegal local variable table start_pc %d", start_bci); | |
1372 return; | |
1373 } | |
1374 u4 end_bci = (u4)(start_bci + length); | |
1375 if (end_bci != code_length) { | |
1376 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1377 class_format_error( "Illegal local variable table length %d", length); | |
1378 return; | |
1379 } | |
1380 } | |
1381 } | |
1382 } | |
1383 } | |
1384 | |
1385 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1386 StackMapFrame* current_frame, | |
1387 StackMapTable* stackmap_table, | |
1388 bool no_control_flow, TRAPS) { | |
1389 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1390 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1391 if (no_control_flow && this_offset > bci) { | |
1392 verify_error(bci, "Expecting a stack map frame"); | |
1393 return 0; | |
1394 } | |
1395 if (this_offset == bci) { | |
1396 // See if current stack map can be assigned to the frame in table. | |
1397 // current_frame is the stackmap frame got from the last instruction. | |
1398 // If matched, current_frame will be updated by this method. | |
1399 bool match = stackmap_table->match_stackmap( | |
1400 current_frame, this_offset, stackmap_index, | |
1401 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1402 if (!match) { | |
1403 // report type error | |
1404 verify_error(bci, "Instruction type does not match stack map"); | |
1405 return 0; | |
1406 } | |
1407 stackmap_index++; | |
1408 } else if (this_offset < bci) { | |
1409 // current_offset should have met this_offset. | |
1410 class_format_error("Bad stack map offset %d", this_offset); | |
1411 return 0; | |
1412 } | |
1413 } else if (no_control_flow) { | |
1414 verify_error(bci, "Expecting a stack map frame"); | |
1415 return 0; | |
1416 } | |
1417 return stackmap_index; | |
1418 } | |
1419 | |
1420 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1421 StackMapTable* stackmap_table, TRAPS) { | |
1422 constantPoolHandle cp (THREAD, _method->constants()); | |
1423 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1424 if (exhandlers() != NULL) { | |
1425 for(int i = 0; i < exhandlers->length();) { | |
1426 u2 start_pc = exhandlers->int_at(i++); | |
1427 u2 end_pc = exhandlers->int_at(i++); | |
1428 u2 handler_pc = exhandlers->int_at(i++); | |
1429 int catch_type_index = exhandlers->int_at(i++); | |
1430 if(bci >= start_pc && bci < end_pc) { | |
1431 u1 flags = current_frame->flags(); | |
1432 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1433 | |
1434 ResourceMark rm(THREAD); | |
1435 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1436 if (catch_type_index != 0) { | |
1437 // We know that this index refers to a subclass of Throwable | |
1438 VerificationType catch_type = cp_index_to_type( | |
1439 catch_type_index, cp, CHECK_VERIFY(this)); | |
1440 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1441 } else { | |
1442 VerificationType throwable = | |
1443 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1444 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1445 } | |
1446 bool match = stackmap_table->match_stackmap( | |
1447 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1448 if (!match) { | |
1449 verify_error(bci, | |
1450 "Stack map does not match the one at exception handler %d", | |
1451 handler_pc); | |
1452 return; | |
1453 } | |
1454 } | |
1455 } | |
1456 } | |
1457 } | |
1458 | |
1459 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1460 int nconstants = cp->length(); | |
1461 if ((index <= 0) || (index >= nconstants)) { | |
1462 verify_error("Illegal constant pool index %d in class %s", | |
1463 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1464 return; | |
1465 } | |
1466 } | |
1467 | |
1468 void ClassVerifier::verify_cp_type( | |
1469 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1470 | |
1471 // In some situations, bytecode rewriting may occur while we're verifying. | |
1472 // In this case, a constant pool cache exists and some indices refer to that | |
1473 // instead. Get the original index for the tag check | |
1474 constantPoolCacheOop cache = cp->cache(); | |
1475 if (cache != NULL && | |
1476 ((types == (1 << JVM_CONSTANT_InterfaceMethodref)) || | |
1477 (types == (1 << JVM_CONSTANT_Methodref)) || | |
1478 (types == (1 << JVM_CONSTANT_Fieldref)))) { | |
1479 int native_index = index; | |
1480 if (Bytes::is_Java_byte_ordering_different()) { | |
1481 native_index = Bytes::swap_u2(index); | |
1482 } | |
1483 assert((native_index >= 0) && (native_index < cache->length()), | |
1484 "Must be a legal index into the cp cache"); | |
1485 index = cache->entry_at(native_index)->constant_pool_index(); | |
1486 } | |
1487 | |
1488 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1489 unsigned int tag = cp->tag_at(index).value(); | |
1490 if ((types & (1 << tag)) == 0) { | |
1491 verify_error( | |
1492 "Illegal type at constant pool entry %d in class %s", | |
1493 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1494 return; | |
1495 } | |
1496 } | |
1497 | |
1498 void ClassVerifier::verify_cp_class_type( | |
1499 int index, constantPoolHandle cp, TRAPS) { | |
1500 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1501 constantTag tag = cp->tag_at(index); | |
1502 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1503 verify_error("Illegal type at constant pool entry %d in class %s", | |
1504 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1505 return; | |
1506 } | |
1507 } | |
1508 | |
1509 void ClassVerifier::format_error_message( | |
1510 const char* fmt, int offset, va_list va) { | |
1511 ResourceMark rm(_thread); | |
1512 stringStream message(_message, _message_buffer_len); | |
1513 message.vprint(fmt, va); | |
1514 if (!_method.is_null()) { | |
1515 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1516 } | |
1517 if (offset != -1) { | |
1518 message.print(" at offset %d", offset); | |
1519 } | |
1520 } | |
1521 | |
1522 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1523 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1524 va_list va; | |
1525 va_start(va, fmt); | |
1526 format_error_message(fmt, offset, va); | |
1527 va_end(va); | |
1528 } | |
1529 | |
1530 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1531 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1532 va_list va; | |
1533 va_start(va, fmt); | |
1534 format_error_message(fmt, -1, va); | |
1535 va_end(va); | |
1536 } | |
1537 | |
1538 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1539 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1540 va_list va; | |
1541 va_start(va, msg); | |
1542 format_error_message(msg, -1, va); | |
1543 va_end(va); | |
1544 } | |
1545 | |
1546 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
1547 // Get current loader and protection domain first. | |
1548 oop loader = current_class()->class_loader(); | |
1549 oop protection_domain = current_class()->protection_domain(); | |
1550 | |
1551 return SystemDictionary::resolve_or_fail( | |
1552 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1553 true, CHECK_NULL); | |
1554 } | |
1555 | |
1556 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1557 klassOop target_class, | |
1558 symbolOop field_name, | |
1559 symbolOop field_sig, | |
1560 bool is_method) { | |
1561 No_Safepoint_Verifier nosafepoint; | |
1562 | |
1563 // If target class isn't a super class of this class, we don't worry about this case | |
1564 if (!this_class->is_subclass_of(target_class)) { | |
1565 return false; | |
1566 } | |
1567 // Check if the specified method or field is protected | |
1568 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1569 fieldDescriptor fd; | |
1570 if (is_method) { | |
1571 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1572 if (m != NULL && m->is_protected()) { | |
1573 if (!this_class->is_same_class_package(m->method_holder())) { | |
1574 return true; | |
1575 } | |
1576 } | |
1577 } else { | |
1578 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1579 if(member_klass != NULL && fd.is_protected()) { | |
1580 if (!this_class->is_same_class_package(member_klass)) { | |
1581 return true; | |
1582 } | |
1583 } | |
1584 } | |
1585 return false; | |
1586 } | |
1587 | |
1588 void ClassVerifier::verify_ldc( | |
1589 int opcode, u2 index, StackMapFrame *current_frame, | |
1590 constantPoolHandle cp, u2 bci, TRAPS) { | |
1591 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1592 constantTag tag = cp->tag_at(index); | |
1593 unsigned int types; | |
1594 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1595 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1596 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1597 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class); | |
1598 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1599 } | |
1600 } else { | |
1601 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1602 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1603 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1604 } | |
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1605 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1606 current_frame->push_stack( |
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1607 VerificationType::reference_type( |
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1608 vmSymbols::java_lang_Object()), CHECK_VERIFY(this)); |
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1609 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1610 current_frame->push_stack( |
1611 VerificationType::reference_type( | |
1612 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1613 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1614 current_frame->push_stack( | |
1615 VerificationType::reference_type( | |
1616 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1617 } else if (tag.is_int()) { | |
1618 current_frame->push_stack( | |
1619 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1620 } else if (tag.is_float()) { | |
1621 current_frame->push_stack( | |
1622 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1623 } else if (tag.is_double()) { | |
1624 current_frame->push_stack_2( | |
1625 VerificationType::double_type(), | |
1626 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1627 } else if (tag.is_long()) { | |
1628 current_frame->push_stack_2( | |
1629 VerificationType::long_type(), | |
1630 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1631 } else { | |
1632 verify_error(bci, "Invalid index in ldc"); | |
1633 return; | |
1634 } | |
1635 } | |
1636 | |
1637 void ClassVerifier::verify_switch( | |
1638 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1639 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1640 int bci = bcs->bci(); | |
1641 address bcp = bcs->bcp(); | |
1642 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1643 | |
1644 // 4639449 & 4647081: padding bytes must be 0 | |
1645 u2 padding_offset = 1; | |
1646 while ((bcp + padding_offset) < aligned_bcp) { | |
1647 if(*(bcp + padding_offset) != 0) { | |
1648 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1649 return; | |
1650 } | |
1651 padding_offset++; | |
1652 } | |
1653 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1654 int keys, delta; | |
1655 current_frame->pop_stack( | |
1656 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1657 if (bcs->code() == Bytecodes::_tableswitch) { | |
1658 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1659 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1660 if (low > high) { | |
1661 verify_error(bci, | |
1662 "low must be less than or equal to high in tableswitch"); | |
1663 return; | |
1664 } | |
1665 keys = high - low + 1; | |
1666 if (keys < 0) { | |
1667 verify_error(bci, "too many keys in tableswitch"); | |
1668 return; | |
1669 } | |
1670 delta = 1; | |
1671 } else { | |
1672 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1673 if (keys < 0) { | |
1674 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1675 return; | |
1676 } | |
1677 delta = 2; | |
1678 // Make sure that the lookupswitch items are sorted | |
1679 for (int i = 0; i < (keys - 1); i++) { | |
1680 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1681 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1682 if (this_key >= next_key) { | |
1683 verify_error(bci, "Bad lookupswitch instruction"); | |
1684 return; | |
1685 } | |
1686 } | |
1687 } | |
1688 int target = bci + default_offset; | |
1689 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1690 for (int i = 0; i < keys; i++) { | |
1691 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1692 stackmap_table->check_jump_target( | |
1693 current_frame, target, CHECK_VERIFY(this)); | |
1694 } | |
1695 } | |
1696 | |
1697 bool ClassVerifier::name_in_supers( | |
1698 symbolOop ref_name, instanceKlassHandle current) { | |
1699 klassOop super = current->super(); | |
1700 while (super != NULL) { | |
1701 if (super->klass_part()->name() == ref_name) { | |
1702 return true; | |
1703 } | |
1704 super = super->klass_part()->super(); | |
1705 } | |
1706 return false; | |
1707 } | |
1708 | |
1709 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1710 StackMapFrame* current_frame, | |
1711 constantPoolHandle cp, | |
1712 TRAPS) { | |
1713 u2 index = bcs->get_index_big(); | |
1714 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); | |
1715 | |
1716 // Get field name and signature | |
1717 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
1718 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
1719 | |
1720 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1721 class_format_error( | |
1722 "Invalid signature for field in class %s referenced " | |
1723 "from constant pool index %d", _klass->external_name(), index); | |
1724 return; | |
1725 } | |
1726 | |
1727 // Get referenced class type | |
1728 VerificationType ref_class_type = cp_ref_index_to_type( | |
1729 index, cp, CHECK_VERIFY(this)); | |
1730 if (!ref_class_type.is_object()) { | |
1731 verify_error( | |
1732 "Expecting reference to class in class %s at constant pool index %d", | |
1733 _klass->external_name(), index); | |
1734 return; | |
1735 } | |
1736 VerificationType target_class_type = ref_class_type; | |
1737 | |
1738 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1739 "buffer type must match VerificationType size"); | |
1740 uintptr_t field_type_buffer[2]; | |
1741 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1742 // If we make a VerificationType[2] array directly, the compiler calls | |
1743 // to the c-runtime library to do the allocation instead of just | |
1744 // stack allocating it. Plus it would run constructors. This shows up | |
1745 // in performance profiles. | |
1746 | |
1747 SignatureStream sig_stream(field_sig, false); | |
1748 VerificationType stack_object_type; | |
1749 int n = change_sig_to_verificationType( | |
1750 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1751 u2 bci = bcs->bci(); | |
1752 bool is_assignable; | |
1753 switch (bcs->code()) { | |
1754 case Bytecodes::_getstatic: { | |
1755 for (int i = 0; i < n; i++) { | |
1756 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1757 } | |
1758 break; | |
1759 } | |
1760 case Bytecodes::_putstatic: { | |
1761 for (int i = n - 1; i >= 0; i--) { | |
1762 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1763 } | |
1764 break; | |
1765 } | |
1766 case Bytecodes::_getfield: { | |
1767 stack_object_type = current_frame->pop_stack( | |
1768 target_class_type, CHECK_VERIFY(this)); | |
1769 for (int i = 0; i < n; i++) { | |
1770 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1771 } | |
1772 goto check_protected; | |
1773 } | |
1774 case Bytecodes::_putfield: { | |
1775 for (int i = n - 1; i >= 0; i--) { | |
1776 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1777 } | |
1778 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1779 | |
1780 // The JVMS 2nd edition allows field initialization before the superclass | |
1781 // initializer, if the field is defined within the current class. | |
1782 fieldDescriptor fd; | |
1783 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1784 target_class_type.equals(current_type()) && | |
1785 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
1786 stack_object_type = current_type(); | |
1787 } | |
1788 is_assignable = target_class_type.is_assignable_from( | |
1789 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1790 if (!is_assignable) { | |
1791 verify_error(bci, "Bad type on operand stack in putfield"); | |
1792 return; | |
1793 } | |
1794 } | |
1795 check_protected: { | |
1796 if (_this_type == stack_object_type) | |
1797 break; // stack_object_type must be assignable to _current_class_type | |
1798 symbolHandle ref_class_name = symbolHandle(THREAD, | |
1799 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
1800 if (!name_in_supers(ref_class_name(), current_class())) | |
1801 // stack_object_type must be assignable to _current_class_type since: | |
1802 // 1. stack_object_type must be assignable to ref_class. | |
1803 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1804 // be a superclass of it. See revised JVMS 5.4.4. | |
1805 break; | |
1806 | |
1807 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
1808 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
1809 field_sig(), false)) { | |
1810 // It's protected access, check if stack object is assignable to | |
1811 // current class. | |
1812 is_assignable = current_type().is_assignable_from( | |
1813 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1814 if (!is_assignable) { | |
1815 verify_error(bci, "Bad access to protected data in getfield"); | |
1816 return; | |
1817 } | |
1818 } | |
1819 break; | |
1820 } | |
1821 default: ShouldNotReachHere(); | |
1822 } | |
1823 } | |
1824 | |
1825 void ClassVerifier::verify_invoke_init( | |
1826 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1827 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1828 constantPoolHandle cp, TRAPS) { | |
1829 u2 bci = bcs->bci(); | |
1830 VerificationType type = current_frame->pop_stack( | |
1831 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1832 if (type == VerificationType::uninitialized_this_type()) { | |
1833 // The method must be an <init> method of either this class, or one of its | |
1834 // superclasses | |
1835 klassOop oop = current_class()(); | |
1836 Klass* klass = oop->klass_part(); | |
1837 while (klass != NULL && ref_class_type.name() != klass->name()) { | |
1838 klass = klass->super()->klass_part(); | |
1839 } | |
1840 if (klass == NULL) { | |
1841 verify_error(bci, "Bad <init> method call"); | |
1842 return; | |
1843 } | |
1844 current_frame->initialize_object(type, current_type()); | |
1845 *this_uninit = true; | |
1846 } else if (type.is_uninitialized()) { | |
1847 u2 new_offset = type.bci(); | |
1848 address new_bcp = bcs->bcp() - bci + new_offset; | |
1849 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1850 verify_error(new_offset, "Expecting new instruction"); | |
1851 return; | |
1852 } | |
1853 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1854 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1855 | |
1856 // The method must be an <init> method of the indicated class | |
1857 VerificationType new_class_type = cp_index_to_type( | |
1858 new_class_index, cp, CHECK_VERIFY(this)); | |
1859 if (!new_class_type.equals(ref_class_type)) { | |
1860 verify_error(bci, "Call to wrong <init> method"); | |
1861 return; | |
1862 } | |
1863 // According to the VM spec, if the referent class is a superclass of the | |
1864 // current class, and is in a different runtime package, and the method is | |
1865 // protected, then the objectref must be the current class or a subclass | |
1866 // of the current class. | |
1867 VerificationType objectref_type = new_class_type; | |
1868 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1869 klassOop ref_klass = load_class( | |
1870 ref_class_type.name(), CHECK_VERIFY(this)); | |
1871 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1872 vmSymbols::object_initializer_name(), | |
1873 cp->signature_ref_at(bcs->get_index_big())); | |
1874 instanceKlassHandle mh(THREAD, m->method_holder()); | |
1875 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1876 bool assignable = current_type().is_assignable_from( | |
1877 objectref_type, current_class(), CHECK_VERIFY(this)); | |
1878 if (!assignable) { | |
1879 verify_error(bci, "Bad access to protected <init> method"); | |
1880 return; | |
1881 } | |
1882 } | |
1883 } | |
1884 current_frame->initialize_object(type, new_class_type); | |
1885 } else { | |
1886 verify_error(bci, "Bad operand type when invoking <init>"); | |
1887 return; | |
1888 } | |
1889 } | |
1890 | |
1891 void ClassVerifier::verify_invoke_instructions( | |
1892 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1893 bool *this_uninit, VerificationType return_type, | |
1894 constantPoolHandle cp, TRAPS) { | |
1895 // Make sure the constant pool item is the right type | |
1896 u2 index = bcs->get_index_big(); | |
1897 Bytecodes::Code opcode = bcs->code(); | |
1898 unsigned int types = (opcode == Bytecodes::_invokeinterface | |
1899 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1900 : opcode == Bytecodes::_invokedynamic |
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1901 ? 1 << JVM_CONSTANT_NameAndType |
0 | 1902 : 1 << JVM_CONSTANT_Methodref); |
1903 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1904 | |
1905 // Get method name and signature | |
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1906 symbolHandle method_name(THREAD, cp->name_ref_at(index)); |
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1907 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); |
0 | 1908 |
1909 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1910 class_format_error( | |
1911 "Invalid method signature in class %s referenced " | |
1912 "from constant pool index %d", _klass->external_name(), index); | |
1913 return; | |
1914 } | |
1915 | |
1916 // Get referenced class type | |
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1917 VerificationType ref_class_type; |
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1918 if (opcode == Bytecodes::_invokedynamic) { |
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1919 if (!EnableInvokeDynamic) { |
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1920 class_format_error( |
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1921 "invokedynamic instructions not enabled on this JVM", |
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1922 _klass->external_name()); |
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1923 return; |
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1924 } |
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1925 } else { |
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1926 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1927 } |
0 | 1928 |
1929 // For a small signature length, we just allocate 128 bytes instead | |
1930 // of parsing the signature once to find its size. | |
1931 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1932 // longs/doubles to be consertive. | |
1933 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1934 "buffer type must match VerificationType size"); | |
1935 uintptr_t on_stack_sig_types_buffer[128]; | |
1936 // If we make a VerificationType[128] array directly, the compiler calls | |
1937 // to the c-runtime library to do the allocation instead of just | |
1938 // stack allocating it. Plus it would run constructors. This shows up | |
1939 // in performance profiles. | |
1940 | |
1941 VerificationType* sig_types; | |
1942 int size = (method_sig->utf8_length() - 3) * 2; | |
1943 if (size > 128) { | |
1944 // Long and double occupies two slots here. | |
1945 ArgumentSizeComputer size_it(method_sig); | |
1946 size = size_it.size(); | |
1947 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1948 } else{ | |
1949 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1950 } | |
1951 SignatureStream sig_stream(method_sig); | |
1952 int sig_i = 0; | |
1953 while (!sig_stream.at_return_type()) { | |
1954 sig_i += change_sig_to_verificationType( | |
1955 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
1956 sig_stream.next(); | |
1957 } | |
1958 int nargs = sig_i; | |
1959 | |
1960 #ifdef ASSERT | |
1961 { | |
1962 ArgumentSizeComputer size_it(method_sig); | |
1963 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
1964 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
1965 } | |
1966 #endif | |
1967 | |
1968 // Check instruction operands | |
1969 u2 bci = bcs->bci(); | |
1970 if (opcode == Bytecodes::_invokeinterface) { | |
1971 address bcp = bcs->bcp(); | |
1972 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
1973 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
1974 // the difference between the size of the operand stack before and after the instruction | |
1975 // executes. | |
1976 if (*(bcp+3) != (nargs+1)) { | |
1977 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
1978 return; | |
1979 } | |
1980 if (*(bcp+4) != 0) { | |
1981 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
1982 return; | |
1983 } | |
1984 } | |
1985 | |
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1986 if (opcode == Bytecodes::_invokedynamic) { |
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1987 address bcp = bcs->bcp(); |
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1988 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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1989 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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1990 return; |
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1991 } |
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1992 } |
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1993 |
0 | 1994 if (method_name->byte_at(0) == '<') { |
1995 // Make sure <init> can only be invoked by invokespecial | |
1996 if (opcode != Bytecodes::_invokespecial || | |
1997 method_name() != vmSymbols::object_initializer_name()) { | |
1998 verify_error(bci, "Illegal call to internal method"); | |
1999 return; | |
2000 } | |
2001 } else if (opcode == Bytecodes::_invokespecial | |
2002 && !ref_class_type.equals(current_type()) | |
2003 && !ref_class_type.equals(VerificationType::reference_type( | |
2004 current_class()->super()->klass_part()->name()))) { | |
2005 bool subtype = ref_class_type.is_assignable_from( | |
2006 current_type(), current_class(), CHECK_VERIFY(this)); | |
2007 if (!subtype) { | |
2008 verify_error(bci, "Bad invokespecial instruction: " | |
2009 "current class isn't assignable to reference class."); | |
2010 return; | |
2011 } | |
2012 } | |
2013 // Match method descriptor with operand stack | |
2014 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2015 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2016 } | |
2017 // Check objectref on operand stack | |
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2018 if (opcode != Bytecodes::_invokestatic && |
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2019 opcode != Bytecodes::_invokedynamic) { |
0 | 2020 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
2021 verify_invoke_init(bcs, ref_class_type, current_frame, | |
2022 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2023 } else { // other methods | |
2024 // Ensures that target class is assignable to method class. | |
2025 if (opcode == Bytecodes::_invokespecial) { | |
2026 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2027 } else if (opcode == Bytecodes::_invokevirtual) { | |
2028 VerificationType stack_object_type = | |
2029 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2030 if (current_type() != stack_object_type) { | |
2031 assert(cp->cache() == NULL, "not rewritten yet"); | |
2032 symbolHandle ref_class_name = symbolHandle(THREAD, | |
2033 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
2034 // See the comments in verify_field_instructions() for | |
2035 // the rationale behind this. | |
2036 if (name_in_supers(ref_class_name(), current_class())) { | |
2037 klassOop ref_class = load_class(ref_class_name, CHECK); | |
2038 if (is_protected_access( | |
2039 _klass, ref_class, method_name(), method_sig(), true)) { | |
2040 // It's protected access, check if stack object is | |
2041 // assignable to current class. | |
2042 bool is_assignable = current_type().is_assignable_from( | |
2043 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
2044 if (!is_assignable) { | |
2045 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2046 && stack_object_type.is_array() | |
2047 && method_name() == vmSymbols::clone_name()) { | |
2048 // Special case: arrays pretend to implement public Object | |
2049 // clone(). | |
2050 } else { | |
2051 verify_error(bci, | |
2052 "Bad access to protected data in invokevirtual"); | |
2053 return; | |
2054 } | |
2055 } | |
2056 } | |
2057 } | |
2058 } | |
2059 } else { | |
2060 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2061 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2062 } | |
2063 } | |
2064 } | |
2065 // Push the result type. | |
2066 if (sig_stream.type() != T_VOID) { | |
2067 if (method_name() == vmSymbols::object_initializer_name()) { | |
2068 // <init> method must have a void return type | |
2069 verify_error(bci, "Return type must be void in <init> method"); | |
2070 return; | |
2071 } | |
2072 VerificationType return_type[2]; | |
2073 int n = change_sig_to_verificationType( | |
2074 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2075 for (int i = 0; i < n; i++) { | |
2076 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2077 } | |
2078 } | |
2079 } | |
2080 | |
2081 VerificationType ClassVerifier::get_newarray_type( | |
2082 u2 index, u2 bci, TRAPS) { | |
2083 const char* from_bt[] = { | |
2084 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2085 }; | |
2086 if (index < T_BOOLEAN || index > T_LONG) { | |
2087 verify_error(bci, "Illegal newarray instruction"); | |
2088 return VerificationType::bogus_type(); | |
2089 } | |
2090 | |
2091 // from_bt[index] contains the array signature which has a length of 2 | |
2092 symbolHandle sig = oopFactory::new_symbol_handle( | |
2093 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
2094 return VerificationType::reference_type(sig); | |
2095 } | |
2096 | |
2097 void ClassVerifier::verify_anewarray( | |
2098 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2099 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2100 current_frame->pop_stack( | |
2101 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2102 | |
2103 VerificationType component_type = | |
2104 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2105 ResourceMark rm(THREAD); | |
2106 int length; | |
2107 char* arr_sig_str; | |
2108 if (component_type.is_array()) { // it's an array | |
2109 const char* component_name = component_type.name()->as_utf8(); | |
2110 // add one dimension to component | |
2111 length = (int)strlen(component_name) + 1; | |
2112 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2113 arr_sig_str[0] = '['; | |
2114 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2115 } else { // it's an object or interface | |
2116 const char* component_name = component_type.name()->as_utf8(); | |
2117 // add one dimension to component with 'L' prepended and ';' postpended. | |
2118 length = (int)strlen(component_name) + 3; | |
2119 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2120 arr_sig_str[0] = '['; | |
2121 arr_sig_str[1] = 'L'; | |
2122 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2123 arr_sig_str[length - 1] = ';'; | |
2124 } | |
2125 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
2126 arr_sig_str, length, CHECK_VERIFY(this)); | |
2127 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2128 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2129 } | |
2130 | |
2131 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2132 current_frame->get_local( | |
2133 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2134 current_frame->push_stack( | |
2135 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2136 } | |
2137 | |
2138 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2139 current_frame->get_local_2( | |
2140 index, VerificationType::long_type(), | |
2141 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2142 current_frame->push_stack_2( | |
2143 VerificationType::long_type(), | |
2144 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2145 } | |
2146 | |
2147 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2148 current_frame->get_local( | |
2149 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2150 current_frame->push_stack( | |
2151 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2152 } | |
2153 | |
2154 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2155 current_frame->get_local_2( | |
2156 index, VerificationType::double_type(), | |
2157 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2158 current_frame->push_stack_2( | |
2159 VerificationType::double_type(), | |
2160 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2161 } | |
2162 | |
2163 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2164 VerificationType type = current_frame->get_local( | |
2165 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2166 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2167 } | |
2168 | |
2169 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2170 current_frame->pop_stack( | |
2171 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2172 current_frame->set_local( | |
2173 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2174 } | |
2175 | |
2176 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2177 current_frame->pop_stack_2( | |
2178 VerificationType::long2_type(), | |
2179 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2180 current_frame->set_local_2( | |
2181 index, VerificationType::long_type(), | |
2182 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2183 } | |
2184 | |
2185 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2186 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2187 current_frame->set_local( | |
2188 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2189 } | |
2190 | |
2191 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2192 current_frame->pop_stack_2( | |
2193 VerificationType::double2_type(), | |
2194 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2195 current_frame->set_local_2( | |
2196 index, VerificationType::double_type(), | |
2197 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2198 } | |
2199 | |
2200 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2201 VerificationType type = current_frame->pop_stack( | |
2202 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2203 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2204 } | |
2205 | |
2206 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2207 VerificationType type = current_frame->get_local( | |
2208 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2209 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2210 } | |
2211 | |
2212 void ClassVerifier::verify_return_value( | |
2213 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2214 if (return_type == VerificationType::bogus_type()) { | |
2215 verify_error(bci, "Method expects a return value"); | |
2216 return; | |
2217 } | |
2218 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
2219 if (!match) { | |
2220 verify_error(bci, "Bad return type"); | |
2221 return; | |
2222 } | |
2223 } |