Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/verifier.cpp @ 1560:e40a3601bc1f
6911922: JVM must throw VerifyError for jsr or jsr_w opcodes in class file v.51+
6693236: A class file whose version number is greater than to 50.0 must be verified using the typechecker
Summary: Disable failover verification for classfiles >= v51
Reviewed-by: never, acorn, dholmes
author | kamg |
---|---|
date | Wed, 19 May 2010 10:19:10 -0400 |
parents | 4ce7240d622c |
children | dfe27f03244a |
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 | |
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28 #define NOFAILOVER_MAJOR_VERSION 51 |
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29 |
0 | 30 // Access to external entry for VerifyClassCodes - old byte code verifier |
31 | |
32 extern "C" { | |
33 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
34 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
35 } | |
36 | |
37 static void* volatile _verify_byte_codes_fn = NULL; | |
38 | |
39 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
40 | |
41 static void* verify_byte_codes_fn() { | |
42 if (_verify_byte_codes_fn == NULL) { | |
43 void *lib_handle = os::native_java_library(); | |
44 void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); | |
45 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
46 if (func == NULL) { | |
47 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
48 func = hpi::dll_lookup(lib_handle, "VerifyClassCodes"); | |
49 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
50 } | |
51 } | |
52 return (void*)_verify_byte_codes_fn; | |
53 } | |
54 | |
55 | |
56 // Methods in Verifier | |
57 | |
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58 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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59 return (class_loader == NULL || !should_verify_class) ? |
0 | 60 BytecodeVerificationLocal : BytecodeVerificationRemote; |
61 } | |
62 | |
63 bool Verifier::relax_verify_for(oop loader) { | |
64 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
65 bool need_verify = | |
66 // verifyAll | |
67 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
68 // verifyRemote | |
69 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
70 return !need_verify; | |
71 } | |
72 | |
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73 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
0 | 74 ResourceMark rm(THREAD); |
75 HandleMark hm; | |
76 | |
77 symbolHandle exception_name; | |
78 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; | |
79 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
80 | |
81 const char* klassName = klass->external_name(); | |
82 | |
83 // If the class should be verified, first see if we can use the split | |
84 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
85 // is set, then call the inference verifier. | |
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86 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 87 if (TraceClassInitialization) { |
88 tty->print_cr("Start class verification for: %s", klassName); | |
89 } | |
90 if (UseSplitVerifier && | |
91 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
92 ClassVerifier split_verifier( | |
93 klass, message_buffer, message_buffer_len, THREAD); | |
94 split_verifier.verify_class(THREAD); | |
95 exception_name = split_verifier.result(); | |
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96 if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && |
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97 FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && |
0 | 98 (exception_name == vmSymbols::java_lang_VerifyError() || |
99 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
100 if (TraceClassInitialization) { | |
101 tty->print_cr( | |
102 "Fail over class verification to old verifier for: %s", klassName); | |
103 } | |
104 exception_name = inference_verify( | |
105 klass, message_buffer, message_buffer_len, THREAD); | |
106 } | |
107 } else { | |
108 exception_name = inference_verify( | |
109 klass, message_buffer, message_buffer_len, THREAD); | |
110 } | |
111 | |
112 if (TraceClassInitialization) { | |
113 if (HAS_PENDING_EXCEPTION) { | |
114 tty->print("Verification for %s has", klassName); | |
115 tty->print_cr(" exception pending %s ", | |
116 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
117 } else if (!exception_name.is_null()) { | |
118 tty->print_cr("Verification for %s failed", klassName); | |
119 } | |
120 tty->print_cr("End class verification for: %s", klassName); | |
121 } | |
122 } | |
123 | |
124 if (HAS_PENDING_EXCEPTION) { | |
125 return false; // use the existing exception | |
126 } else if (exception_name.is_null()) { | |
127 return true; // verifcation succeeded | |
128 } else { // VerifyError or ClassFormatError to be created and thrown | |
129 ResourceMark rm(THREAD); | |
130 instanceKlassHandle kls = | |
131 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
132 while (!kls.is_null()) { | |
133 if (kls == klass) { | |
134 // If the class being verified is the exception we're creating | |
135 // or one of it's superclasses, we're in trouble and are going | |
136 // to infinitely recurse when we try to initialize the exception. | |
137 // So bail out here by throwing the preallocated VM error. | |
138 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
139 } | |
140 kls = kls->super(); | |
141 } | |
142 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
143 THROW_MSG_(exception_name, message_buffer, false); | |
144 } | |
145 } | |
146 | |
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147 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
0 | 148 symbolOop name = klass->name(); |
1142 | 149 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 150 |
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151 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 152 // return if the class is a bootstrapping class |
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153 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 154 // We need to skip the following four for bootstraping |
155 name != vmSymbols::java_lang_Object() && | |
156 name != vmSymbols::java_lang_Class() && | |
157 name != vmSymbols::java_lang_String() && | |
158 name != vmSymbols::java_lang_Throwable() && | |
159 | |
160 // Can not verify the bytecodes for shared classes because they have | |
161 // already been rewritten to contain constant pool cache indices, | |
162 // which the verifier can't understand. | |
163 // Shared classes shouldn't have stackmaps either. | |
164 !klass()->is_shared() && | |
165 | |
166 // As of the fix for 4486457 we disable verification for all of the | |
167 // dynamically-generated bytecodes associated with the 1.4 | |
168 // reflection implementation, not just those associated with | |
169 // sun/reflect/SerializationConstructorAccessor. | |
170 // NOTE: this is called too early in the bootstrapping process to be | |
171 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
172 (refl_magic_klass == NULL || | |
173 !klass->is_subtype_of(refl_magic_klass) || | |
174 VerifyReflectionBytecodes) | |
175 ); | |
176 } | |
177 | |
178 symbolHandle Verifier::inference_verify( | |
179 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { | |
180 JavaThread* thread = (JavaThread*)THREAD; | |
181 JNIEnv *env = thread->jni_environment(); | |
182 | |
183 void* verify_func = verify_byte_codes_fn(); | |
184 | |
185 if (verify_func == NULL) { | |
186 jio_snprintf(message, message_len, "Could not link verifier"); | |
187 return vmSymbols::java_lang_VerifyError(); | |
188 } | |
189 | |
190 ResourceMark rm(THREAD); | |
191 if (ClassVerifier::_verify_verbose) { | |
192 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
193 } | |
194 | |
195 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
196 jint result; | |
197 | |
198 { | |
199 HandleMark hm(thread); | |
200 ThreadToNativeFromVM ttn(thread); | |
201 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
202 // code knows that we have left the VM | |
203 | |
204 if (_is_new_verify_byte_codes_fn) { | |
205 verify_byte_codes_fn_new_t func = | |
206 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
207 result = (*func)(env, cls, message, (int)message_len, | |
208 klass->major_version()); | |
209 } else { | |
210 verify_byte_codes_fn_t func = | |
211 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
212 result = (*func)(env, cls, message, (int)message_len); | |
213 } | |
214 } | |
215 | |
216 JNIHandles::destroy_local(cls); | |
217 | |
218 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
219 // to be changed (still return jboolean (unsigned char)), and result is | |
220 // 1 when verification is passed. | |
221 symbolHandle nh(NULL); | |
222 if (result == 0) { | |
223 return vmSymbols::java_lang_VerifyError(); | |
224 } else if (result == 1) { | |
225 return nh; // verified. | |
226 } else if (result == 2) { | |
227 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); | |
228 } else if (result == 3) { | |
229 return vmSymbols::java_lang_ClassFormatError(); | |
230 } else { | |
231 ShouldNotReachHere(); | |
232 return nh; | |
233 } | |
234 } | |
235 | |
236 // Methods in ClassVerifier | |
237 | |
238 bool ClassVerifier::_verify_verbose = false; | |
239 | |
240 ClassVerifier::ClassVerifier( | |
241 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
242 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), | |
243 _message_buffer_len(msg_len), _klass(klass) { | |
244 _this_type = VerificationType::reference_type(klass->name()); | |
245 } | |
246 | |
247 ClassVerifier::~ClassVerifier() { | |
248 } | |
249 | |
250 void ClassVerifier::verify_class(TRAPS) { | |
251 if (_verify_verbose) { | |
252 tty->print_cr("Verifying class %s with new format", | |
253 _klass->external_name()); | |
254 } | |
255 | |
256 objArrayHandle methods(THREAD, _klass->methods()); | |
257 int num_methods = methods->length(); | |
258 | |
259 for (int index = 0; index < num_methods; index++) { | |
260 methodOop m = (methodOop)methods->obj_at(index); | |
261 if (m->is_native() || m->is_abstract()) { | |
262 // If m is native or abstract, skip it. It is checked in class file | |
263 // parser that methods do not override a final method. | |
264 continue; | |
265 } | |
266 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
267 } | |
268 } | |
269 | |
270 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
271 ResourceMark rm(THREAD); | |
272 _method = m; // initialize _method | |
273 if (_verify_verbose) { | |
274 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
275 } | |
276 | |
277 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
278 | |
279 int32_t max_stack = m->max_stack(); | |
280 int32_t max_locals = m->max_locals(); | |
281 constantPoolHandle cp(THREAD, m->constants()); | |
282 | |
283 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
284 class_format_error("Invalid method signature"); | |
285 return; | |
286 } | |
287 | |
288 // Initial stack map frame: offset is 0, stack is initially empty. | |
289 StackMapFrame current_frame(max_locals, max_stack, this); | |
290 // Set initial locals | |
291 VerificationType return_type = current_frame.set_locals_from_arg( | |
292 m, current_type(), CHECK_VERIFY(this)); | |
293 | |
294 int32_t stackmap_index = 0; // index to the stackmap array | |
295 | |
296 u4 code_length = m->code_size(); | |
297 | |
298 // Scan the bytecode and map each instruction's start offset to a number. | |
299 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
300 | |
301 int ex_min = code_length; | |
302 int ex_max = -1; | |
303 // Look through each item on the exception table. Each of the fields must refer | |
304 // to a legal instruction. | |
305 verify_exception_handler_table( | |
306 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
307 | |
308 // Look through each entry on the local variable table and make sure | |
309 // its range of code array offsets is valid. (4169817) | |
310 if (m->has_localvariable_table()) { | |
311 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
312 } | |
313 | |
314 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
315 StackMapStream stream(stackmap_data); | |
316 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
317 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
318 code_data, code_length, CHECK_VERIFY(this)); | |
319 | |
320 if (_verify_verbose) { | |
321 stackmap_table.print(); | |
322 } | |
323 | |
324 RawBytecodeStream bcs(m); | |
325 | |
326 // Scan the byte code linearly from the start to the end | |
327 bool no_control_flow = false; // Set to true when there is no direct control | |
328 // flow from current instruction to the next | |
329 // instruction in sequence | |
330 Bytecodes::Code opcode; | |
331 while (!bcs.is_last_bytecode()) { | |
332 opcode = bcs.raw_next(); | |
333 u2 bci = bcs.bci(); | |
334 | |
335 // Set current frame's offset to bci | |
336 current_frame.set_offset(bci); | |
337 | |
338 // Make sure every offset in stackmap table point to the beginning to | |
339 // an instruction. Match current_frame to stackmap_table entry with | |
340 // the same offset if exists. | |
341 stackmap_index = verify_stackmap_table( | |
342 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
343 no_control_flow, CHECK_VERIFY(this)); | |
344 | |
345 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
346 | |
347 // Merge with the next instruction | |
348 { | |
349 u2 index; | |
350 int target; | |
351 VerificationType type, type2; | |
352 VerificationType atype; | |
353 | |
354 #ifndef PRODUCT | |
355 if (_verify_verbose) { | |
356 current_frame.print(); | |
357 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
358 } | |
359 #endif | |
360 | |
361 // Make sure wide instruction is in correct format | |
362 if (bcs.is_wide()) { | |
363 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
364 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
365 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
366 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
367 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
368 opcode != Bytecodes::_dstore) { | |
369 verify_error(bci, "Bad wide instruction"); | |
370 return; | |
371 } | |
372 } | |
373 | |
374 switch (opcode) { | |
375 case Bytecodes::_nop : | |
376 no_control_flow = false; break; | |
377 case Bytecodes::_aconst_null : | |
378 current_frame.push_stack( | |
379 VerificationType::null_type(), CHECK_VERIFY(this)); | |
380 no_control_flow = false; break; | |
381 case Bytecodes::_iconst_m1 : | |
382 case Bytecodes::_iconst_0 : | |
383 case Bytecodes::_iconst_1 : | |
384 case Bytecodes::_iconst_2 : | |
385 case Bytecodes::_iconst_3 : | |
386 case Bytecodes::_iconst_4 : | |
387 case Bytecodes::_iconst_5 : | |
388 current_frame.push_stack( | |
389 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
390 no_control_flow = false; break; | |
391 case Bytecodes::_lconst_0 : | |
392 case Bytecodes::_lconst_1 : | |
393 current_frame.push_stack_2( | |
394 VerificationType::long_type(), | |
395 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
396 no_control_flow = false; break; | |
397 case Bytecodes::_fconst_0 : | |
398 case Bytecodes::_fconst_1 : | |
399 case Bytecodes::_fconst_2 : | |
400 current_frame.push_stack( | |
401 VerificationType::float_type(), CHECK_VERIFY(this)); | |
402 no_control_flow = false; break; | |
403 case Bytecodes::_dconst_0 : | |
404 case Bytecodes::_dconst_1 : | |
405 current_frame.push_stack_2( | |
406 VerificationType::double_type(), | |
407 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
408 no_control_flow = false; break; | |
409 case Bytecodes::_sipush : | |
410 case Bytecodes::_bipush : | |
411 current_frame.push_stack( | |
412 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
413 no_control_flow = false; break; | |
414 case Bytecodes::_ldc : | |
415 verify_ldc( | |
416 opcode, bcs.get_index(), ¤t_frame, | |
417 cp, bci, CHECK_VERIFY(this)); | |
418 no_control_flow = false; break; | |
419 case Bytecodes::_ldc_w : | |
420 case Bytecodes::_ldc2_w : | |
421 verify_ldc( | |
422 opcode, bcs.get_index_big(), ¤t_frame, | |
423 cp, bci, CHECK_VERIFY(this)); | |
424 no_control_flow = false; break; | |
425 case Bytecodes::_iload : | |
426 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
427 no_control_flow = false; break; | |
428 case Bytecodes::_iload_0 : | |
429 case Bytecodes::_iload_1 : | |
430 case Bytecodes::_iload_2 : | |
431 case Bytecodes::_iload_3 : | |
432 index = opcode - Bytecodes::_iload_0; | |
433 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
434 no_control_flow = false; break; | |
435 case Bytecodes::_lload : | |
436 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
437 no_control_flow = false; break; | |
438 case Bytecodes::_lload_0 : | |
439 case Bytecodes::_lload_1 : | |
440 case Bytecodes::_lload_2 : | |
441 case Bytecodes::_lload_3 : | |
442 index = opcode - Bytecodes::_lload_0; | |
443 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
444 no_control_flow = false; break; | |
445 case Bytecodes::_fload : | |
446 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
447 no_control_flow = false; break; | |
448 case Bytecodes::_fload_0 : | |
449 case Bytecodes::_fload_1 : | |
450 case Bytecodes::_fload_2 : | |
451 case Bytecodes::_fload_3 : | |
452 index = opcode - Bytecodes::_fload_0; | |
453 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
454 no_control_flow = false; break; | |
455 case Bytecodes::_dload : | |
456 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
457 no_control_flow = false; break; | |
458 case Bytecodes::_dload_0 : | |
459 case Bytecodes::_dload_1 : | |
460 case Bytecodes::_dload_2 : | |
461 case Bytecodes::_dload_3 : | |
462 index = opcode - Bytecodes::_dload_0; | |
463 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
464 no_control_flow = false; break; | |
465 case Bytecodes::_aload : | |
466 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
467 no_control_flow = false; break; | |
468 case Bytecodes::_aload_0 : | |
469 case Bytecodes::_aload_1 : | |
470 case Bytecodes::_aload_2 : | |
471 case Bytecodes::_aload_3 : | |
472 index = opcode - Bytecodes::_aload_0; | |
473 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
474 no_control_flow = false; break; | |
475 case Bytecodes::_iaload : | |
476 type = current_frame.pop_stack( | |
477 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
478 atype = current_frame.pop_stack( | |
479 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
480 if (!atype.is_int_array()) { | |
481 verify_error(bci, bad_type_msg, "iaload"); | |
482 return; | |
483 } | |
484 current_frame.push_stack( | |
485 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
486 no_control_flow = false; break; | |
487 case Bytecodes::_baload : | |
488 type = current_frame.pop_stack( | |
489 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
490 atype = current_frame.pop_stack( | |
491 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
492 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
493 verify_error(bci, bad_type_msg, "baload"); | |
494 return; | |
495 } | |
496 current_frame.push_stack( | |
497 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
498 no_control_flow = false; break; | |
499 case Bytecodes::_caload : | |
500 type = current_frame.pop_stack( | |
501 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
502 atype = current_frame.pop_stack( | |
503 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
504 if (!atype.is_char_array()) { | |
505 verify_error(bci, bad_type_msg, "caload"); | |
506 return; | |
507 } | |
508 current_frame.push_stack( | |
509 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
510 no_control_flow = false; break; | |
511 case Bytecodes::_saload : | |
512 type = current_frame.pop_stack( | |
513 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
514 atype = current_frame.pop_stack( | |
515 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
516 if (!atype.is_short_array()) { | |
517 verify_error(bci, bad_type_msg, "saload"); | |
518 return; | |
519 } | |
520 current_frame.push_stack( | |
521 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
522 no_control_flow = false; break; | |
523 case Bytecodes::_laload : | |
524 type = current_frame.pop_stack( | |
525 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
526 atype = current_frame.pop_stack( | |
527 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
528 if (!atype.is_long_array()) { | |
529 verify_error(bci, bad_type_msg, "laload"); | |
530 return; | |
531 } | |
532 current_frame.push_stack_2( | |
533 VerificationType::long_type(), | |
534 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
535 no_control_flow = false; break; | |
536 case Bytecodes::_faload : | |
537 type = current_frame.pop_stack( | |
538 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
539 atype = current_frame.pop_stack( | |
540 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
541 if (!atype.is_float_array()) { | |
542 verify_error(bci, bad_type_msg, "faload"); | |
543 return; | |
544 } | |
545 current_frame.push_stack( | |
546 VerificationType::float_type(), CHECK_VERIFY(this)); | |
547 no_control_flow = false; break; | |
548 case Bytecodes::_daload : | |
549 type = current_frame.pop_stack( | |
550 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
551 atype = current_frame.pop_stack( | |
552 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
553 if (!atype.is_double_array()) { | |
554 verify_error(bci, bad_type_msg, "daload"); | |
555 return; | |
556 } | |
557 current_frame.push_stack_2( | |
558 VerificationType::double_type(), | |
559 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
560 no_control_flow = false; break; | |
561 case Bytecodes::_aaload : { | |
562 type = current_frame.pop_stack( | |
563 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
564 atype = current_frame.pop_stack( | |
565 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
566 if (!atype.is_reference_array()) { | |
567 verify_error(bci, bad_type_msg, "aaload"); | |
568 return; | |
569 } | |
570 if (atype.is_null()) { | |
571 current_frame.push_stack( | |
572 VerificationType::null_type(), CHECK_VERIFY(this)); | |
573 } else { | |
574 VerificationType component = | |
575 atype.get_component(CHECK_VERIFY(this)); | |
576 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
577 } | |
578 no_control_flow = false; break; | |
579 } | |
580 case Bytecodes::_istore : | |
581 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
582 no_control_flow = false; break; | |
583 case Bytecodes::_istore_0 : | |
584 case Bytecodes::_istore_1 : | |
585 case Bytecodes::_istore_2 : | |
586 case Bytecodes::_istore_3 : | |
587 index = opcode - Bytecodes::_istore_0; | |
588 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
589 no_control_flow = false; break; | |
590 case Bytecodes::_lstore : | |
591 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
592 no_control_flow = false; break; | |
593 case Bytecodes::_lstore_0 : | |
594 case Bytecodes::_lstore_1 : | |
595 case Bytecodes::_lstore_2 : | |
596 case Bytecodes::_lstore_3 : | |
597 index = opcode - Bytecodes::_lstore_0; | |
598 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
599 no_control_flow = false; break; | |
600 case Bytecodes::_fstore : | |
601 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
602 no_control_flow = false; break; | |
603 case Bytecodes::_fstore_0 : | |
604 case Bytecodes::_fstore_1 : | |
605 case Bytecodes::_fstore_2 : | |
606 case Bytecodes::_fstore_3 : | |
607 index = opcode - Bytecodes::_fstore_0; | |
608 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
609 no_control_flow = false; break; | |
610 case Bytecodes::_dstore : | |
611 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
612 no_control_flow = false; break; | |
613 case Bytecodes::_dstore_0 : | |
614 case Bytecodes::_dstore_1 : | |
615 case Bytecodes::_dstore_2 : | |
616 case Bytecodes::_dstore_3 : | |
617 index = opcode - Bytecodes::_dstore_0; | |
618 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
619 no_control_flow = false; break; | |
620 case Bytecodes::_astore : | |
621 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
622 no_control_flow = false; break; | |
623 case Bytecodes::_astore_0 : | |
624 case Bytecodes::_astore_1 : | |
625 case Bytecodes::_astore_2 : | |
626 case Bytecodes::_astore_3 : | |
627 index = opcode - Bytecodes::_astore_0; | |
628 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
629 no_control_flow = false; break; | |
630 case Bytecodes::_iastore : | |
631 type = current_frame.pop_stack( | |
632 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
633 type2 = current_frame.pop_stack( | |
634 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
635 atype = current_frame.pop_stack( | |
636 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
637 if (!atype.is_int_array()) { | |
638 verify_error(bci, bad_type_msg, "iastore"); | |
639 return; | |
640 } | |
641 no_control_flow = false; break; | |
642 case Bytecodes::_bastore : | |
643 type = current_frame.pop_stack( | |
644 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
645 type2 = current_frame.pop_stack( | |
646 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
647 atype = current_frame.pop_stack( | |
648 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
649 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
650 verify_error(bci, bad_type_msg, "bastore"); | |
651 return; | |
652 } | |
653 no_control_flow = false; break; | |
654 case Bytecodes::_castore : | |
655 current_frame.pop_stack( | |
656 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
657 current_frame.pop_stack( | |
658 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
659 atype = current_frame.pop_stack( | |
660 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
661 if (!atype.is_char_array()) { | |
662 verify_error(bci, bad_type_msg, "castore"); | |
663 return; | |
664 } | |
665 no_control_flow = false; break; | |
666 case Bytecodes::_sastore : | |
667 current_frame.pop_stack( | |
668 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
669 current_frame.pop_stack( | |
670 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
671 atype = current_frame.pop_stack( | |
672 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
673 if (!atype.is_short_array()) { | |
674 verify_error(bci, bad_type_msg, "sastore"); | |
675 return; | |
676 } | |
677 no_control_flow = false; break; | |
678 case Bytecodes::_lastore : | |
679 current_frame.pop_stack_2( | |
680 VerificationType::long2_type(), | |
681 VerificationType::long_type(), CHECK_VERIFY(this)); | |
682 current_frame.pop_stack( | |
683 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
684 atype = current_frame.pop_stack( | |
685 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
686 if (!atype.is_long_array()) { | |
687 verify_error(bci, bad_type_msg, "lastore"); | |
688 return; | |
689 } | |
690 no_control_flow = false; break; | |
691 case Bytecodes::_fastore : | |
692 current_frame.pop_stack( | |
693 VerificationType::float_type(), CHECK_VERIFY(this)); | |
694 current_frame.pop_stack | |
695 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
696 atype = current_frame.pop_stack( | |
697 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
698 if (!atype.is_float_array()) { | |
699 verify_error(bci, bad_type_msg, "fastore"); | |
700 return; | |
701 } | |
702 no_control_flow = false; break; | |
703 case Bytecodes::_dastore : | |
704 current_frame.pop_stack_2( | |
705 VerificationType::double2_type(), | |
706 VerificationType::double_type(), CHECK_VERIFY(this)); | |
707 current_frame.pop_stack( | |
708 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
709 atype = current_frame.pop_stack( | |
710 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
711 if (!atype.is_double_array()) { | |
712 verify_error(bci, bad_type_msg, "dastore"); | |
713 return; | |
714 } | |
715 no_control_flow = false; break; | |
716 case Bytecodes::_aastore : | |
717 type = current_frame.pop_stack( | |
718 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
719 type2 = current_frame.pop_stack( | |
720 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
721 atype = current_frame.pop_stack( | |
722 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
723 // more type-checking is done at runtime | |
724 if (!atype.is_reference_array()) { | |
725 verify_error(bci, bad_type_msg, "aastore"); | |
726 return; | |
727 } | |
728 // 4938384: relaxed constraint in JVMS 3nd edition. | |
729 no_control_flow = false; break; | |
730 case Bytecodes::_pop : | |
731 current_frame.pop_stack( | |
732 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
733 no_control_flow = false; break; | |
734 case Bytecodes::_pop2 : | |
735 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
736 if (type.is_category1()) { | |
737 current_frame.pop_stack( | |
738 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
739 } else if (type.is_category2_2nd()) { | |
740 current_frame.pop_stack( | |
741 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
742 } else { | |
743 verify_error(bci, bad_type_msg, "pop2"); | |
744 return; | |
745 } | |
746 no_control_flow = false; break; | |
747 case Bytecodes::_dup : | |
748 type = current_frame.pop_stack( | |
749 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
750 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
751 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
752 no_control_flow = false; break; | |
753 case Bytecodes::_dup_x1 : | |
754 type = current_frame.pop_stack( | |
755 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
756 type2 = current_frame.pop_stack( | |
757 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
758 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
759 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
760 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
761 no_control_flow = false; break; | |
762 case Bytecodes::_dup_x2 : | |
763 { | |
764 VerificationType type3; | |
765 type = current_frame.pop_stack( | |
766 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
767 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
768 if (type2.is_category1()) { | |
769 type3 = current_frame.pop_stack( | |
770 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
771 } else if (type2.is_category2_2nd()) { | |
772 type3 = current_frame.pop_stack( | |
773 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
774 } else { | |
775 verify_error(bci, bad_type_msg, "dup_x2"); | |
776 return; | |
777 } | |
778 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
779 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
780 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
781 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
782 no_control_flow = false; break; | |
783 } | |
784 case Bytecodes::_dup2 : | |
785 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
786 if (type.is_category1()) { | |
787 type2 = current_frame.pop_stack( | |
788 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
789 } else if (type.is_category2_2nd()) { | |
790 type2 = current_frame.pop_stack( | |
791 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
792 } else { | |
793 verify_error(bci, bad_type_msg, "dup2"); | |
794 return; | |
795 } | |
796 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
797 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
798 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
799 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
800 no_control_flow = false; break; | |
801 case Bytecodes::_dup2_x1 : | |
802 { | |
803 VerificationType type3; | |
804 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
805 if (type.is_category1()) { | |
806 type2 = current_frame.pop_stack( | |
807 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
808 } else if(type.is_category2_2nd()) { | |
809 type2 = current_frame.pop_stack | |
810 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
811 } else { | |
812 verify_error(bci, bad_type_msg, "dup2_x1"); | |
813 return; | |
814 } | |
815 type3 = current_frame.pop_stack( | |
816 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
817 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
818 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
819 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
820 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
821 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
822 no_control_flow = false; break; | |
823 } | |
824 case Bytecodes::_dup2_x2 : | |
825 { | |
826 VerificationType type3, type4; | |
827 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
828 if (type.is_category1()) { | |
829 type2 = current_frame.pop_stack( | |
830 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
831 } else if (type.is_category2_2nd()) { | |
832 type2 = current_frame.pop_stack( | |
833 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
834 } else { | |
835 verify_error(bci, bad_type_msg, "dup2_x2"); | |
836 return; | |
837 } | |
838 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
839 if (type3.is_category1()) { | |
840 type4 = current_frame.pop_stack( | |
841 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
842 } else if (type3.is_category2_2nd()) { | |
843 type4 = current_frame.pop_stack( | |
844 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
845 } else { | |
846 verify_error(bci, bad_type_msg, "dup2_x2"); | |
847 return; | |
848 } | |
849 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
850 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
851 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
852 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
853 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
854 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
855 no_control_flow = false; break; | |
856 } | |
857 case Bytecodes::_swap : | |
858 type = current_frame.pop_stack( | |
859 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
860 type2 = current_frame.pop_stack( | |
861 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
862 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
863 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
864 no_control_flow = false; break; | |
865 case Bytecodes::_iadd : | |
866 case Bytecodes::_isub : | |
867 case Bytecodes::_imul : | |
868 case Bytecodes::_idiv : | |
869 case Bytecodes::_irem : | |
870 case Bytecodes::_ishl : | |
871 case Bytecodes::_ishr : | |
872 case Bytecodes::_iushr : | |
873 case Bytecodes::_ior : | |
874 case Bytecodes::_ixor : | |
875 case Bytecodes::_iand : | |
876 current_frame.pop_stack( | |
877 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
878 // fall through | |
879 case Bytecodes::_ineg : | |
880 current_frame.pop_stack( | |
881 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
882 current_frame.push_stack( | |
883 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
884 no_control_flow = false; break; | |
885 case Bytecodes::_ladd : | |
886 case Bytecodes::_lsub : | |
887 case Bytecodes::_lmul : | |
888 case Bytecodes::_ldiv : | |
889 case Bytecodes::_lrem : | |
890 case Bytecodes::_land : | |
891 case Bytecodes::_lor : | |
892 case Bytecodes::_lxor : | |
893 current_frame.pop_stack_2( | |
894 VerificationType::long2_type(), | |
895 VerificationType::long_type(), CHECK_VERIFY(this)); | |
896 // fall through | |
897 case Bytecodes::_lneg : | |
898 current_frame.pop_stack_2( | |
899 VerificationType::long2_type(), | |
900 VerificationType::long_type(), CHECK_VERIFY(this)); | |
901 current_frame.push_stack_2( | |
902 VerificationType::long_type(), | |
903 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
904 no_control_flow = false; break; | |
905 case Bytecodes::_lshl : | |
906 case Bytecodes::_lshr : | |
907 case Bytecodes::_lushr : | |
908 current_frame.pop_stack( | |
909 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
910 current_frame.pop_stack_2( | |
911 VerificationType::long2_type(), | |
912 VerificationType::long_type(), CHECK_VERIFY(this)); | |
913 current_frame.push_stack_2( | |
914 VerificationType::long_type(), | |
915 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
916 no_control_flow = false; break; | |
917 case Bytecodes::_fadd : | |
918 case Bytecodes::_fsub : | |
919 case Bytecodes::_fmul : | |
920 case Bytecodes::_fdiv : | |
921 case Bytecodes::_frem : | |
922 current_frame.pop_stack( | |
923 VerificationType::float_type(), CHECK_VERIFY(this)); | |
924 // fall through | |
925 case Bytecodes::_fneg : | |
926 current_frame.pop_stack( | |
927 VerificationType::float_type(), CHECK_VERIFY(this)); | |
928 current_frame.push_stack( | |
929 VerificationType::float_type(), CHECK_VERIFY(this)); | |
930 no_control_flow = false; break; | |
931 case Bytecodes::_dadd : | |
932 case Bytecodes::_dsub : | |
933 case Bytecodes::_dmul : | |
934 case Bytecodes::_ddiv : | |
935 case Bytecodes::_drem : | |
936 current_frame.pop_stack_2( | |
937 VerificationType::double2_type(), | |
938 VerificationType::double_type(), CHECK_VERIFY(this)); | |
939 // fall through | |
940 case Bytecodes::_dneg : | |
941 current_frame.pop_stack_2( | |
942 VerificationType::double2_type(), | |
943 VerificationType::double_type(), CHECK_VERIFY(this)); | |
944 current_frame.push_stack_2( | |
945 VerificationType::double_type(), | |
946 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
947 no_control_flow = false; break; | |
948 case Bytecodes::_iinc : | |
949 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
950 no_control_flow = false; break; | |
951 case Bytecodes::_i2l : | |
952 type = current_frame.pop_stack( | |
953 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
954 current_frame.push_stack_2( | |
955 VerificationType::long_type(), | |
956 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
957 no_control_flow = false; break; | |
958 case Bytecodes::_l2i : | |
959 current_frame.pop_stack_2( | |
960 VerificationType::long2_type(), | |
961 VerificationType::long_type(), CHECK_VERIFY(this)); | |
962 current_frame.push_stack( | |
963 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
964 no_control_flow = false; break; | |
965 case Bytecodes::_i2f : | |
966 current_frame.pop_stack( | |
967 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
968 current_frame.push_stack( | |
969 VerificationType::float_type(), CHECK_VERIFY(this)); | |
970 no_control_flow = false; break; | |
971 case Bytecodes::_i2d : | |
972 current_frame.pop_stack( | |
973 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
974 current_frame.push_stack_2( | |
975 VerificationType::double_type(), | |
976 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
977 no_control_flow = false; break; | |
978 case Bytecodes::_l2f : | |
979 current_frame.pop_stack_2( | |
980 VerificationType::long2_type(), | |
981 VerificationType::long_type(), CHECK_VERIFY(this)); | |
982 current_frame.push_stack( | |
983 VerificationType::float_type(), CHECK_VERIFY(this)); | |
984 no_control_flow = false; break; | |
985 case Bytecodes::_l2d : | |
986 current_frame.pop_stack_2( | |
987 VerificationType::long2_type(), | |
988 VerificationType::long_type(), CHECK_VERIFY(this)); | |
989 current_frame.push_stack_2( | |
990 VerificationType::double_type(), | |
991 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
992 no_control_flow = false; break; | |
993 case Bytecodes::_f2i : | |
994 current_frame.pop_stack( | |
995 VerificationType::float_type(), CHECK_VERIFY(this)); | |
996 current_frame.push_stack( | |
997 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
998 no_control_flow = false; break; | |
999 case Bytecodes::_f2l : | |
1000 current_frame.pop_stack( | |
1001 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1002 current_frame.push_stack_2( | |
1003 VerificationType::long_type(), | |
1004 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1005 no_control_flow = false; break; | |
1006 case Bytecodes::_f2d : | |
1007 current_frame.pop_stack( | |
1008 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1009 current_frame.push_stack_2( | |
1010 VerificationType::double_type(), | |
1011 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1012 no_control_flow = false; break; | |
1013 case Bytecodes::_d2i : | |
1014 current_frame.pop_stack_2( | |
1015 VerificationType::double2_type(), | |
1016 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1017 current_frame.push_stack( | |
1018 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1019 no_control_flow = false; break; | |
1020 case Bytecodes::_d2l : | |
1021 current_frame.pop_stack_2( | |
1022 VerificationType::double2_type(), | |
1023 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1024 current_frame.push_stack_2( | |
1025 VerificationType::long_type(), | |
1026 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1027 no_control_flow = false; break; | |
1028 case Bytecodes::_d2f : | |
1029 current_frame.pop_stack_2( | |
1030 VerificationType::double2_type(), | |
1031 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1032 current_frame.push_stack( | |
1033 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1034 no_control_flow = false; break; | |
1035 case Bytecodes::_i2b : | |
1036 case Bytecodes::_i2c : | |
1037 case Bytecodes::_i2s : | |
1038 current_frame.pop_stack( | |
1039 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1040 current_frame.push_stack( | |
1041 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1042 no_control_flow = false; break; | |
1043 case Bytecodes::_lcmp : | |
1044 current_frame.pop_stack_2( | |
1045 VerificationType::long2_type(), | |
1046 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1047 current_frame.pop_stack_2( | |
1048 VerificationType::long2_type(), | |
1049 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1050 current_frame.push_stack( | |
1051 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1052 no_control_flow = false; break; | |
1053 case Bytecodes::_fcmpl : | |
1054 case Bytecodes::_fcmpg : | |
1055 current_frame.pop_stack( | |
1056 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1057 current_frame.pop_stack( | |
1058 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1059 current_frame.push_stack( | |
1060 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1061 no_control_flow = false; break; | |
1062 case Bytecodes::_dcmpl : | |
1063 case Bytecodes::_dcmpg : | |
1064 current_frame.pop_stack_2( | |
1065 VerificationType::double2_type(), | |
1066 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1067 current_frame.pop_stack_2( | |
1068 VerificationType::double2_type(), | |
1069 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1070 current_frame.push_stack( | |
1071 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1072 no_control_flow = false; break; | |
1073 case Bytecodes::_if_icmpeq: | |
1074 case Bytecodes::_if_icmpne: | |
1075 case Bytecodes::_if_icmplt: | |
1076 case Bytecodes::_if_icmpge: | |
1077 case Bytecodes::_if_icmpgt: | |
1078 case Bytecodes::_if_icmple: | |
1079 current_frame.pop_stack( | |
1080 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1081 // fall through | |
1082 case Bytecodes::_ifeq: | |
1083 case Bytecodes::_ifne: | |
1084 case Bytecodes::_iflt: | |
1085 case Bytecodes::_ifge: | |
1086 case Bytecodes::_ifgt: | |
1087 case Bytecodes::_ifle: | |
1088 current_frame.pop_stack( | |
1089 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1090 target = bcs.dest(); | |
1091 stackmap_table.check_jump_target( | |
1092 ¤t_frame, target, CHECK_VERIFY(this)); | |
1093 no_control_flow = false; break; | |
1094 case Bytecodes::_if_acmpeq : | |
1095 case Bytecodes::_if_acmpne : | |
1096 current_frame.pop_stack( | |
1097 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1098 // fall through | |
1099 case Bytecodes::_ifnull : | |
1100 case Bytecodes::_ifnonnull : | |
1101 current_frame.pop_stack( | |
1102 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1103 target = bcs.dest(); | |
1104 stackmap_table.check_jump_target | |
1105 (¤t_frame, target, CHECK_VERIFY(this)); | |
1106 no_control_flow = false; break; | |
1107 case Bytecodes::_goto : | |
1108 target = bcs.dest(); | |
1109 stackmap_table.check_jump_target( | |
1110 ¤t_frame, target, CHECK_VERIFY(this)); | |
1111 no_control_flow = true; break; | |
1112 case Bytecodes::_goto_w : | |
1113 target = bcs.dest_w(); | |
1114 stackmap_table.check_jump_target( | |
1115 ¤t_frame, target, CHECK_VERIFY(this)); | |
1116 no_control_flow = true; break; | |
1117 case Bytecodes::_tableswitch : | |
1118 case Bytecodes::_lookupswitch : | |
1119 verify_switch( | |
1120 &bcs, code_length, code_data, ¤t_frame, | |
1121 &stackmap_table, CHECK_VERIFY(this)); | |
1122 no_control_flow = true; break; | |
1123 case Bytecodes::_ireturn : | |
1124 type = current_frame.pop_stack( | |
1125 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1126 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1127 no_control_flow = true; break; | |
1128 case Bytecodes::_lreturn : | |
1129 type2 = current_frame.pop_stack( | |
1130 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1131 type = current_frame.pop_stack( | |
1132 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1133 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1134 no_control_flow = true; break; | |
1135 case Bytecodes::_freturn : | |
1136 type = current_frame.pop_stack( | |
1137 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1138 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1139 no_control_flow = true; break; | |
1140 case Bytecodes::_dreturn : | |
1141 type2 = current_frame.pop_stack( | |
1142 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1143 type = current_frame.pop_stack( | |
1144 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1145 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1146 no_control_flow = true; break; | |
1147 case Bytecodes::_areturn : | |
1148 type = current_frame.pop_stack( | |
1149 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1150 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1151 no_control_flow = true; break; | |
1152 case Bytecodes::_return : | |
1153 if (return_type != VerificationType::bogus_type()) { | |
1154 verify_error(bci, "Method expects no return value"); | |
1155 return; | |
1156 } | |
1157 // Make sure "this" has been initialized if current method is an | |
1158 // <init> | |
1159 if (_method->name() == vmSymbols::object_initializer_name() && | |
1160 current_frame.flag_this_uninit()) { | |
1161 verify_error(bci, | |
1162 "Constructor must call super() or this() before return"); | |
1163 return; | |
1164 } | |
1165 no_control_flow = true; break; | |
1166 case Bytecodes::_getstatic : | |
1167 case Bytecodes::_putstatic : | |
1168 case Bytecodes::_getfield : | |
1169 case Bytecodes::_putfield : | |
1170 verify_field_instructions( | |
1171 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1172 no_control_flow = false; break; | |
1173 case Bytecodes::_invokevirtual : | |
1174 case Bytecodes::_invokespecial : | |
1175 case Bytecodes::_invokestatic : | |
1176 verify_invoke_instructions( | |
1177 &bcs, code_length, ¤t_frame, | |
1178 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1179 no_control_flow = false; break; | |
1180 case Bytecodes::_invokeinterface : | |
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1181 case Bytecodes::_invokedynamic : |
0 | 1182 verify_invoke_instructions( |
1183 &bcs, code_length, ¤t_frame, | |
1184 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1185 no_control_flow = false; break; | |
1186 case Bytecodes::_new : | |
1187 { | |
1188 index = bcs.get_index_big(); | |
1189 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1190 VerificationType new_class_type = | |
1191 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1192 if (!new_class_type.is_object()) { | |
1193 verify_error(bci, "Illegal new instruction"); | |
1194 return; | |
1195 } | |
1196 type = VerificationType::uninitialized_type(bci); | |
1197 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1198 no_control_flow = false; break; | |
1199 } | |
1200 case Bytecodes::_newarray : | |
1201 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1202 current_frame.pop_stack( | |
1203 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1204 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1205 no_control_flow = false; break; | |
1206 case Bytecodes::_anewarray : | |
1207 verify_anewarray( | |
1208 bcs.get_index_big(), cp, ¤t_frame, CHECK_VERIFY(this)); | |
1209 no_control_flow = false; break; | |
1210 case Bytecodes::_arraylength : | |
1211 type = current_frame.pop_stack( | |
1212 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1213 if (!(type.is_null() || type.is_array())) { |
0 | 1214 verify_error(bci, bad_type_msg, "arraylength"); |
1215 } | |
1216 current_frame.push_stack( | |
1217 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1218 no_control_flow = false; break; | |
1219 case Bytecodes::_checkcast : | |
1220 { | |
1221 index = bcs.get_index_big(); | |
1222 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1223 current_frame.pop_stack( | |
1224 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1225 VerificationType klass_type = cp_index_to_type( | |
1226 index, cp, CHECK_VERIFY(this)); | |
1227 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1228 no_control_flow = false; break; | |
1229 } | |
1230 case Bytecodes::_instanceof : { | |
1231 index = bcs.get_index_big(); | |
1232 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1233 current_frame.pop_stack( | |
1234 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1235 current_frame.push_stack( | |
1236 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1237 no_control_flow = false; break; | |
1238 } | |
1239 case Bytecodes::_monitorenter : | |
1240 case Bytecodes::_monitorexit : | |
1241 current_frame.pop_stack( | |
1242 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1243 no_control_flow = false; break; | |
1244 case Bytecodes::_multianewarray : | |
1245 { | |
1246 index = bcs.get_index_big(); | |
1247 u2 dim = *(bcs.bcp()+3); | |
1248 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1249 VerificationType new_array_type = | |
1250 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1251 if (!new_array_type.is_array()) { | |
1252 verify_error(bci, | |
1253 "Illegal constant pool index in multianewarray instruction"); | |
1254 return; | |
1255 } | |
1256 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1257 verify_error(bci, | |
1258 "Illegal dimension in multianewarray instruction"); | |
1259 return; | |
1260 } | |
1261 for (int i = 0; i < dim; i++) { | |
1262 current_frame.pop_stack( | |
1263 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1264 } | |
1265 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1266 no_control_flow = false; break; | |
1267 } | |
1268 case Bytecodes::_athrow : | |
1269 type = VerificationType::reference_type( | |
1270 vmSymbols::java_lang_Throwable()); | |
1271 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1272 no_control_flow = true; break; | |
1273 default: | |
1274 // We only need to check the valid bytecodes in class file. | |
1275 // And jsr and ret are not in the new class file format in JDK1.5. | |
1276 verify_error(bci, "Bad instruction"); | |
1277 no_control_flow = false; | |
1278 return; | |
1279 } // end switch | |
1280 } // end Merge with the next instruction | |
1281 | |
1282 // Look for possible jump target in exception handlers and see if it | |
1283 // matches current_frame | |
1284 if (bci >= ex_min && bci < ex_max) { | |
1285 verify_exception_handler_targets( | |
1286 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1287 } | |
1288 } // end while | |
1289 | |
1290 // Make sure that control flow does not fall through end of the method | |
1291 if (!no_control_flow) { | |
1292 verify_error(code_length, "Control flow falls through code end"); | |
1293 return; | |
1294 } | |
1295 } | |
1296 | |
1297 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1298 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1299 memset(code_data, 0, sizeof(char) * code_length); | |
1300 RawBytecodeStream bcs(m); | |
1301 | |
1302 while (!bcs.is_last_bytecode()) { | |
1303 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1304 int bci = bcs.bci(); | |
1305 if (bcs.code() == Bytecodes::_new) { | |
1306 code_data[bci] = NEW_OFFSET; | |
1307 } else { | |
1308 code_data[bci] = BYTECODE_OFFSET; | |
1309 } | |
1310 } else { | |
1311 verify_error(bcs.bci(), "Bad instruction"); | |
1312 return NULL; | |
1313 } | |
1314 } | |
1315 | |
1316 return code_data; | |
1317 } | |
1318 | |
1319 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1320 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1321 constantPoolHandle cp (THREAD, _method->constants()); | |
1322 | |
1323 if (exhandlers() != NULL) { | |
1324 for(int i = 0; i < exhandlers->length();) { | |
1325 u2 start_pc = exhandlers->int_at(i++); | |
1326 u2 end_pc = exhandlers->int_at(i++); | |
1327 u2 handler_pc = exhandlers->int_at(i++); | |
1328 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1329 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1330 return; | |
1331 } | |
1332 if (end_pc != code_length) { // special case: end_pc == code_length | |
1333 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1334 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1335 return; | |
1336 } | |
1337 } | |
1338 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1339 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1340 return; | |
1341 } | |
1342 int catch_type_index = exhandlers->int_at(i++); | |
1343 if (catch_type_index != 0) { | |
1344 VerificationType catch_type = cp_index_to_type( | |
1345 catch_type_index, cp, CHECK_VERIFY(this)); | |
1346 VerificationType throwable = | |
1347 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1348 bool is_subclass = throwable.is_assignable_from( | |
1349 catch_type, current_class(), CHECK_VERIFY(this)); | |
1350 if (!is_subclass) { | |
1351 // 4286534: should throw VerifyError according to recent spec change | |
1352 verify_error( | |
1353 "Catch type is not a subclass of Throwable in handler %d", | |
1354 handler_pc); | |
1355 return; | |
1356 } | |
1357 } | |
1358 if (start_pc < min) min = start_pc; | |
1359 if (end_pc > max) max = end_pc; | |
1360 } | |
1361 } | |
1362 } | |
1363 | |
1364 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1365 int localvariable_table_length = _method()->localvariable_table_length(); | |
1366 if (localvariable_table_length > 0) { | |
1367 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1368 for (int i = 0; i < localvariable_table_length; i++) { | |
1369 u2 start_bci = table[i].start_bci; | |
1370 u2 length = table[i].length; | |
1371 | |
1372 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1373 class_format_error( | |
1374 "Illegal local variable table start_pc %d", start_bci); | |
1375 return; | |
1376 } | |
1377 u4 end_bci = (u4)(start_bci + length); | |
1378 if (end_bci != code_length) { | |
1379 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1380 class_format_error( "Illegal local variable table length %d", length); | |
1381 return; | |
1382 } | |
1383 } | |
1384 } | |
1385 } | |
1386 } | |
1387 | |
1388 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1389 StackMapFrame* current_frame, | |
1390 StackMapTable* stackmap_table, | |
1391 bool no_control_flow, TRAPS) { | |
1392 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1393 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1394 if (no_control_flow && this_offset > bci) { | |
1395 verify_error(bci, "Expecting a stack map frame"); | |
1396 return 0; | |
1397 } | |
1398 if (this_offset == bci) { | |
1399 // See if current stack map can be assigned to the frame in table. | |
1400 // current_frame is the stackmap frame got from the last instruction. | |
1401 // If matched, current_frame will be updated by this method. | |
1402 bool match = stackmap_table->match_stackmap( | |
1403 current_frame, this_offset, stackmap_index, | |
1404 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1405 if (!match) { | |
1406 // report type error | |
1407 verify_error(bci, "Instruction type does not match stack map"); | |
1408 return 0; | |
1409 } | |
1410 stackmap_index++; | |
1411 } else if (this_offset < bci) { | |
1412 // current_offset should have met this_offset. | |
1413 class_format_error("Bad stack map offset %d", this_offset); | |
1414 return 0; | |
1415 } | |
1416 } else if (no_control_flow) { | |
1417 verify_error(bci, "Expecting a stack map frame"); | |
1418 return 0; | |
1419 } | |
1420 return stackmap_index; | |
1421 } | |
1422 | |
1423 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1424 StackMapTable* stackmap_table, TRAPS) { | |
1425 constantPoolHandle cp (THREAD, _method->constants()); | |
1426 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1427 if (exhandlers() != NULL) { | |
1428 for(int i = 0; i < exhandlers->length();) { | |
1429 u2 start_pc = exhandlers->int_at(i++); | |
1430 u2 end_pc = exhandlers->int_at(i++); | |
1431 u2 handler_pc = exhandlers->int_at(i++); | |
1432 int catch_type_index = exhandlers->int_at(i++); | |
1433 if(bci >= start_pc && bci < end_pc) { | |
1434 u1 flags = current_frame->flags(); | |
1435 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1436 | |
1437 ResourceMark rm(THREAD); | |
1438 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1439 if (catch_type_index != 0) { | |
1440 // We know that this index refers to a subclass of Throwable | |
1441 VerificationType catch_type = cp_index_to_type( | |
1442 catch_type_index, cp, CHECK_VERIFY(this)); | |
1443 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1444 } else { | |
1445 VerificationType throwable = | |
1446 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1447 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1448 } | |
1449 bool match = stackmap_table->match_stackmap( | |
1450 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1451 if (!match) { | |
1452 verify_error(bci, | |
1453 "Stack map does not match the one at exception handler %d", | |
1454 handler_pc); | |
1455 return; | |
1456 } | |
1457 } | |
1458 } | |
1459 } | |
1460 } | |
1461 | |
1462 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1463 int nconstants = cp->length(); | |
1464 if ((index <= 0) || (index >= nconstants)) { | |
1465 verify_error("Illegal constant pool index %d in class %s", | |
1466 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1467 return; | |
1468 } | |
1469 } | |
1470 | |
1471 void ClassVerifier::verify_cp_type( | |
1472 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1473 | |
1474 // In some situations, bytecode rewriting may occur while we're verifying. | |
1475 // In this case, a constant pool cache exists and some indices refer to that | |
1476 // instead. Get the original index for the tag check | |
1477 constantPoolCacheOop cache = cp->cache(); | |
1478 if (cache != NULL && | |
1479 ((types == (1 << JVM_CONSTANT_InterfaceMethodref)) || | |
1480 (types == (1 << JVM_CONSTANT_Methodref)) || | |
1481 (types == (1 << JVM_CONSTANT_Fieldref)))) { | |
1482 int native_index = index; | |
1483 if (Bytes::is_Java_byte_ordering_different()) { | |
1484 native_index = Bytes::swap_u2(index); | |
1485 } | |
1486 assert((native_index >= 0) && (native_index < cache->length()), | |
1487 "Must be a legal index into the cp cache"); | |
1488 index = cache->entry_at(native_index)->constant_pool_index(); | |
1489 } | |
1490 | |
1491 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1492 unsigned int tag = cp->tag_at(index).value(); | |
1493 if ((types & (1 << tag)) == 0) { | |
1494 verify_error( | |
1495 "Illegal type at constant pool entry %d in class %s", | |
1496 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1497 return; | |
1498 } | |
1499 } | |
1500 | |
1501 void ClassVerifier::verify_cp_class_type( | |
1502 int index, constantPoolHandle cp, TRAPS) { | |
1503 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1504 constantTag tag = cp->tag_at(index); | |
1505 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1506 verify_error("Illegal type at constant pool entry %d in class %s", | |
1507 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1508 return; | |
1509 } | |
1510 } | |
1511 | |
1512 void ClassVerifier::format_error_message( | |
1513 const char* fmt, int offset, va_list va) { | |
1514 ResourceMark rm(_thread); | |
1515 stringStream message(_message, _message_buffer_len); | |
1516 message.vprint(fmt, va); | |
1517 if (!_method.is_null()) { | |
1518 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1519 } | |
1520 if (offset != -1) { | |
1521 message.print(" at offset %d", offset); | |
1522 } | |
1523 } | |
1524 | |
1525 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1526 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1527 va_list va; | |
1528 va_start(va, fmt); | |
1529 format_error_message(fmt, offset, va); | |
1530 va_end(va); | |
1531 } | |
1532 | |
1533 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1534 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1535 va_list va; | |
1536 va_start(va, fmt); | |
1537 format_error_message(fmt, -1, va); | |
1538 va_end(va); | |
1539 } | |
1540 | |
1541 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1542 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1543 va_list va; | |
1544 va_start(va, msg); | |
1545 format_error_message(msg, -1, va); | |
1546 va_end(va); | |
1547 } | |
1548 | |
1549 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
1550 // Get current loader and protection domain first. | |
1551 oop loader = current_class()->class_loader(); | |
1552 oop protection_domain = current_class()->protection_domain(); | |
1553 | |
1554 return SystemDictionary::resolve_or_fail( | |
1555 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1556 true, CHECK_NULL); | |
1557 } | |
1558 | |
1559 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1560 klassOop target_class, | |
1561 symbolOop field_name, | |
1562 symbolOop field_sig, | |
1563 bool is_method) { | |
1564 No_Safepoint_Verifier nosafepoint; | |
1565 | |
1566 // If target class isn't a super class of this class, we don't worry about this case | |
1567 if (!this_class->is_subclass_of(target_class)) { | |
1568 return false; | |
1569 } | |
1570 // Check if the specified method or field is protected | |
1571 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1572 fieldDescriptor fd; | |
1573 if (is_method) { | |
1574 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1575 if (m != NULL && m->is_protected()) { | |
1576 if (!this_class->is_same_class_package(m->method_holder())) { | |
1577 return true; | |
1578 } | |
1579 } | |
1580 } else { | |
1581 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1582 if(member_klass != NULL && fd.is_protected()) { | |
1583 if (!this_class->is_same_class_package(member_klass)) { | |
1584 return true; | |
1585 } | |
1586 } | |
1587 } | |
1588 return false; | |
1589 } | |
1590 | |
1591 void ClassVerifier::verify_ldc( | |
1592 int opcode, u2 index, StackMapFrame *current_frame, | |
1593 constantPoolHandle cp, u2 bci, TRAPS) { | |
1594 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1595 constantTag tag = cp->tag_at(index); | |
1596 unsigned int types; | |
1597 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1598 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1599 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1600 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class); | |
1601 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1602 } | |
1603 } else { | |
1604 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1605 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1606 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1607 } | |
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1608 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
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1609 current_frame->push_stack( |
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1610 VerificationType::reference_type( |
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1611 vmSymbols::java_lang_Object()), CHECK_VERIFY(this)); |
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1612 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1613 current_frame->push_stack( |
1614 VerificationType::reference_type( | |
1615 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1616 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1617 current_frame->push_stack( | |
1618 VerificationType::reference_type( | |
1619 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1620 } else if (tag.is_int()) { | |
1621 current_frame->push_stack( | |
1622 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1623 } else if (tag.is_float()) { | |
1624 current_frame->push_stack( | |
1625 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1626 } else if (tag.is_double()) { | |
1627 current_frame->push_stack_2( | |
1628 VerificationType::double_type(), | |
1629 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1630 } else if (tag.is_long()) { | |
1631 current_frame->push_stack_2( | |
1632 VerificationType::long_type(), | |
1633 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1634 } else { | |
1635 verify_error(bci, "Invalid index in ldc"); | |
1636 return; | |
1637 } | |
1638 } | |
1639 | |
1640 void ClassVerifier::verify_switch( | |
1641 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1642 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1643 int bci = bcs->bci(); | |
1644 address bcp = bcs->bcp(); | |
1645 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1646 | |
1647 // 4639449 & 4647081: padding bytes must be 0 | |
1648 u2 padding_offset = 1; | |
1649 while ((bcp + padding_offset) < aligned_bcp) { | |
1650 if(*(bcp + padding_offset) != 0) { | |
1651 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1652 return; | |
1653 } | |
1654 padding_offset++; | |
1655 } | |
1656 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1657 int keys, delta; | |
1658 current_frame->pop_stack( | |
1659 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1660 if (bcs->code() == Bytecodes::_tableswitch) { | |
1661 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1662 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1663 if (low > high) { | |
1664 verify_error(bci, | |
1665 "low must be less than or equal to high in tableswitch"); | |
1666 return; | |
1667 } | |
1668 keys = high - low + 1; | |
1669 if (keys < 0) { | |
1670 verify_error(bci, "too many keys in tableswitch"); | |
1671 return; | |
1672 } | |
1673 delta = 1; | |
1674 } else { | |
1675 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1676 if (keys < 0) { | |
1677 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1678 return; | |
1679 } | |
1680 delta = 2; | |
1681 // Make sure that the lookupswitch items are sorted | |
1682 for (int i = 0; i < (keys - 1); i++) { | |
1683 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1684 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1685 if (this_key >= next_key) { | |
1686 verify_error(bci, "Bad lookupswitch instruction"); | |
1687 return; | |
1688 } | |
1689 } | |
1690 } | |
1691 int target = bci + default_offset; | |
1692 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1693 for (int i = 0; i < keys; i++) { | |
1694 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1695 stackmap_table->check_jump_target( | |
1696 current_frame, target, CHECK_VERIFY(this)); | |
1697 } | |
1698 } | |
1699 | |
1700 bool ClassVerifier::name_in_supers( | |
1701 symbolOop ref_name, instanceKlassHandle current) { | |
1702 klassOop super = current->super(); | |
1703 while (super != NULL) { | |
1704 if (super->klass_part()->name() == ref_name) { | |
1705 return true; | |
1706 } | |
1707 super = super->klass_part()->super(); | |
1708 } | |
1709 return false; | |
1710 } | |
1711 | |
1712 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1713 StackMapFrame* current_frame, | |
1714 constantPoolHandle cp, | |
1715 TRAPS) { | |
1716 u2 index = bcs->get_index_big(); | |
1717 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); | |
1718 | |
1719 // Get field name and signature | |
1720 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
1721 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
1722 | |
1723 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1724 class_format_error( | |
1725 "Invalid signature for field in class %s referenced " | |
1726 "from constant pool index %d", _klass->external_name(), index); | |
1727 return; | |
1728 } | |
1729 | |
1730 // Get referenced class type | |
1731 VerificationType ref_class_type = cp_ref_index_to_type( | |
1732 index, cp, CHECK_VERIFY(this)); | |
1733 if (!ref_class_type.is_object()) { | |
1734 verify_error( | |
1735 "Expecting reference to class in class %s at constant pool index %d", | |
1736 _klass->external_name(), index); | |
1737 return; | |
1738 } | |
1739 VerificationType target_class_type = ref_class_type; | |
1740 | |
1741 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1742 "buffer type must match VerificationType size"); | |
1743 uintptr_t field_type_buffer[2]; | |
1744 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1745 // If we make a VerificationType[2] array directly, the compiler calls | |
1746 // to the c-runtime library to do the allocation instead of just | |
1747 // stack allocating it. Plus it would run constructors. This shows up | |
1748 // in performance profiles. | |
1749 | |
1750 SignatureStream sig_stream(field_sig, false); | |
1751 VerificationType stack_object_type; | |
1752 int n = change_sig_to_verificationType( | |
1753 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1754 u2 bci = bcs->bci(); | |
1755 bool is_assignable; | |
1756 switch (bcs->code()) { | |
1757 case Bytecodes::_getstatic: { | |
1758 for (int i = 0; i < n; i++) { | |
1759 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1760 } | |
1761 break; | |
1762 } | |
1763 case Bytecodes::_putstatic: { | |
1764 for (int i = n - 1; i >= 0; i--) { | |
1765 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1766 } | |
1767 break; | |
1768 } | |
1769 case Bytecodes::_getfield: { | |
1770 stack_object_type = current_frame->pop_stack( | |
1771 target_class_type, CHECK_VERIFY(this)); | |
1772 for (int i = 0; i < n; i++) { | |
1773 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1774 } | |
1775 goto check_protected; | |
1776 } | |
1777 case Bytecodes::_putfield: { | |
1778 for (int i = n - 1; i >= 0; i--) { | |
1779 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1780 } | |
1781 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1782 | |
1783 // The JVMS 2nd edition allows field initialization before the superclass | |
1784 // initializer, if the field is defined within the current class. | |
1785 fieldDescriptor fd; | |
1786 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1787 target_class_type.equals(current_type()) && | |
1788 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
1789 stack_object_type = current_type(); | |
1790 } | |
1791 is_assignable = target_class_type.is_assignable_from( | |
1792 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1793 if (!is_assignable) { | |
1794 verify_error(bci, "Bad type on operand stack in putfield"); | |
1795 return; | |
1796 } | |
1797 } | |
1798 check_protected: { | |
1799 if (_this_type == stack_object_type) | |
1800 break; // stack_object_type must be assignable to _current_class_type | |
1801 symbolHandle ref_class_name = symbolHandle(THREAD, | |
1802 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
1803 if (!name_in_supers(ref_class_name(), current_class())) | |
1804 // stack_object_type must be assignable to _current_class_type since: | |
1805 // 1. stack_object_type must be assignable to ref_class. | |
1806 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1807 // be a superclass of it. See revised JVMS 5.4.4. | |
1808 break; | |
1809 | |
1810 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
1811 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
1812 field_sig(), false)) { | |
1813 // It's protected access, check if stack object is assignable to | |
1814 // current class. | |
1815 is_assignable = current_type().is_assignable_from( | |
1816 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1817 if (!is_assignable) { | |
1818 verify_error(bci, "Bad access to protected data in getfield"); | |
1819 return; | |
1820 } | |
1821 } | |
1822 break; | |
1823 } | |
1824 default: ShouldNotReachHere(); | |
1825 } | |
1826 } | |
1827 | |
1828 void ClassVerifier::verify_invoke_init( | |
1829 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1830 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1831 constantPoolHandle cp, TRAPS) { | |
1832 u2 bci = bcs->bci(); | |
1833 VerificationType type = current_frame->pop_stack( | |
1834 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1835 if (type == VerificationType::uninitialized_this_type()) { | |
1836 // The method must be an <init> method of either this class, or one of its | |
1837 // superclasses | |
1838 klassOop oop = current_class()(); | |
1839 Klass* klass = oop->klass_part(); | |
1840 while (klass != NULL && ref_class_type.name() != klass->name()) { | |
1841 klass = klass->super()->klass_part(); | |
1842 } | |
1843 if (klass == NULL) { | |
1844 verify_error(bci, "Bad <init> method call"); | |
1845 return; | |
1846 } | |
1847 current_frame->initialize_object(type, current_type()); | |
1848 *this_uninit = true; | |
1849 } else if (type.is_uninitialized()) { | |
1850 u2 new_offset = type.bci(); | |
1851 address new_bcp = bcs->bcp() - bci + new_offset; | |
1852 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1853 verify_error(new_offset, "Expecting new instruction"); | |
1854 return; | |
1855 } | |
1856 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1857 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1858 | |
1859 // The method must be an <init> method of the indicated class | |
1860 VerificationType new_class_type = cp_index_to_type( | |
1861 new_class_index, cp, CHECK_VERIFY(this)); | |
1862 if (!new_class_type.equals(ref_class_type)) { | |
1863 verify_error(bci, "Call to wrong <init> method"); | |
1864 return; | |
1865 } | |
1866 // According to the VM spec, if the referent class is a superclass of the | |
1867 // current class, and is in a different runtime package, and the method is | |
1868 // protected, then the objectref must be the current class or a subclass | |
1869 // of the current class. | |
1870 VerificationType objectref_type = new_class_type; | |
1871 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1872 klassOop ref_klass = load_class( | |
1873 ref_class_type.name(), CHECK_VERIFY(this)); | |
1874 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1875 vmSymbols::object_initializer_name(), | |
1876 cp->signature_ref_at(bcs->get_index_big())); | |
1877 instanceKlassHandle mh(THREAD, m->method_holder()); | |
1878 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1879 bool assignable = current_type().is_assignable_from( | |
1880 objectref_type, current_class(), CHECK_VERIFY(this)); | |
1881 if (!assignable) { | |
1882 verify_error(bci, "Bad access to protected <init> method"); | |
1883 return; | |
1884 } | |
1885 } | |
1886 } | |
1887 current_frame->initialize_object(type, new_class_type); | |
1888 } else { | |
1889 verify_error(bci, "Bad operand type when invoking <init>"); | |
1890 return; | |
1891 } | |
1892 } | |
1893 | |
1894 void ClassVerifier::verify_invoke_instructions( | |
1895 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1896 bool *this_uninit, VerificationType return_type, | |
1897 constantPoolHandle cp, TRAPS) { | |
1898 // Make sure the constant pool item is the right type | |
1899 u2 index = bcs->get_index_big(); | |
1900 Bytecodes::Code opcode = bcs->code(); | |
1901 unsigned int types = (opcode == Bytecodes::_invokeinterface | |
1902 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1903 : opcode == Bytecodes::_invokedynamic |
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1904 ? 1 << JVM_CONSTANT_NameAndType |
0 | 1905 : 1 << JVM_CONSTANT_Methodref); |
1906 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1907 | |
1908 // Get method name and signature | |
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1909 symbolHandle method_name(THREAD, cp->name_ref_at(index)); |
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1910 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); |
0 | 1911 |
1912 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1913 class_format_error( | |
1914 "Invalid method signature in class %s referenced " | |
1915 "from constant pool index %d", _klass->external_name(), index); | |
1916 return; | |
1917 } | |
1918 | |
1919 // Get referenced class type | |
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1920 VerificationType ref_class_type; |
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1921 if (opcode == Bytecodes::_invokedynamic) { |
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1922 if (!EnableInvokeDynamic) { |
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1923 class_format_error( |
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1924 "invokedynamic instructions not enabled on this JVM", |
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1925 _klass->external_name()); |
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1926 return; |
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1927 } |
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1928 } else { |
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1929 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1930 } |
0 | 1931 |
1932 // For a small signature length, we just allocate 128 bytes instead | |
1933 // of parsing the signature once to find its size. | |
1934 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1935 // longs/doubles to be consertive. | |
1936 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1937 "buffer type must match VerificationType size"); | |
1938 uintptr_t on_stack_sig_types_buffer[128]; | |
1939 // If we make a VerificationType[128] array directly, the compiler calls | |
1940 // to the c-runtime library to do the allocation instead of just | |
1941 // stack allocating it. Plus it would run constructors. This shows up | |
1942 // in performance profiles. | |
1943 | |
1944 VerificationType* sig_types; | |
1945 int size = (method_sig->utf8_length() - 3) * 2; | |
1946 if (size > 128) { | |
1947 // Long and double occupies two slots here. | |
1948 ArgumentSizeComputer size_it(method_sig); | |
1949 size = size_it.size(); | |
1950 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1951 } else{ | |
1952 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1953 } | |
1954 SignatureStream sig_stream(method_sig); | |
1955 int sig_i = 0; | |
1956 while (!sig_stream.at_return_type()) { | |
1957 sig_i += change_sig_to_verificationType( | |
1958 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
1959 sig_stream.next(); | |
1960 } | |
1961 int nargs = sig_i; | |
1962 | |
1963 #ifdef ASSERT | |
1964 { | |
1965 ArgumentSizeComputer size_it(method_sig); | |
1966 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
1967 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
1968 } | |
1969 #endif | |
1970 | |
1971 // Check instruction operands | |
1972 u2 bci = bcs->bci(); | |
1973 if (opcode == Bytecodes::_invokeinterface) { | |
1974 address bcp = bcs->bcp(); | |
1975 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
1976 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
1977 // the difference between the size of the operand stack before and after the instruction | |
1978 // executes. | |
1979 if (*(bcp+3) != (nargs+1)) { | |
1980 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
1981 return; | |
1982 } | |
1983 if (*(bcp+4) != 0) { | |
1984 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
1985 return; | |
1986 } | |
1987 } | |
1988 | |
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1989 if (opcode == Bytecodes::_invokedynamic) { |
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1990 address bcp = bcs->bcp(); |
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1991 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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1992 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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1993 return; |
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1994 } |
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1995 } |
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1996 |
0 | 1997 if (method_name->byte_at(0) == '<') { |
1998 // Make sure <init> can only be invoked by invokespecial | |
1999 if (opcode != Bytecodes::_invokespecial || | |
2000 method_name() != vmSymbols::object_initializer_name()) { | |
2001 verify_error(bci, "Illegal call to internal method"); | |
2002 return; | |
2003 } | |
2004 } else if (opcode == Bytecodes::_invokespecial | |
2005 && !ref_class_type.equals(current_type()) | |
2006 && !ref_class_type.equals(VerificationType::reference_type( | |
2007 current_class()->super()->klass_part()->name()))) { | |
2008 bool subtype = ref_class_type.is_assignable_from( | |
2009 current_type(), current_class(), CHECK_VERIFY(this)); | |
2010 if (!subtype) { | |
2011 verify_error(bci, "Bad invokespecial instruction: " | |
2012 "current class isn't assignable to reference class."); | |
2013 return; | |
2014 } | |
2015 } | |
2016 // Match method descriptor with operand stack | |
2017 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2018 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2019 } | |
2020 // Check objectref on operand stack | |
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2021 if (opcode != Bytecodes::_invokestatic && |
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2022 opcode != Bytecodes::_invokedynamic) { |
0 | 2023 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
2024 verify_invoke_init(bcs, ref_class_type, current_frame, | |
2025 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2026 } else { // other methods | |
2027 // Ensures that target class is assignable to method class. | |
2028 if (opcode == Bytecodes::_invokespecial) { | |
2029 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2030 } else if (opcode == Bytecodes::_invokevirtual) { | |
2031 VerificationType stack_object_type = | |
2032 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2033 if (current_type() != stack_object_type) { | |
2034 assert(cp->cache() == NULL, "not rewritten yet"); | |
2035 symbolHandle ref_class_name = symbolHandle(THREAD, | |
2036 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
2037 // See the comments in verify_field_instructions() for | |
2038 // the rationale behind this. | |
2039 if (name_in_supers(ref_class_name(), current_class())) { | |
2040 klassOop ref_class = load_class(ref_class_name, CHECK); | |
2041 if (is_protected_access( | |
2042 _klass, ref_class, method_name(), method_sig(), true)) { | |
2043 // It's protected access, check if stack object is | |
2044 // assignable to current class. | |
2045 bool is_assignable = current_type().is_assignable_from( | |
2046 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
2047 if (!is_assignable) { | |
2048 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2049 && stack_object_type.is_array() | |
2050 && method_name() == vmSymbols::clone_name()) { | |
2051 // Special case: arrays pretend to implement public Object | |
2052 // clone(). | |
2053 } else { | |
2054 verify_error(bci, | |
2055 "Bad access to protected data in invokevirtual"); | |
2056 return; | |
2057 } | |
2058 } | |
2059 } | |
2060 } | |
2061 } | |
2062 } else { | |
2063 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2064 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2065 } | |
2066 } | |
2067 } | |
2068 // Push the result type. | |
2069 if (sig_stream.type() != T_VOID) { | |
2070 if (method_name() == vmSymbols::object_initializer_name()) { | |
2071 // <init> method must have a void return type | |
2072 verify_error(bci, "Return type must be void in <init> method"); | |
2073 return; | |
2074 } | |
2075 VerificationType return_type[2]; | |
2076 int n = change_sig_to_verificationType( | |
2077 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2078 for (int i = 0; i < n; i++) { | |
2079 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2080 } | |
2081 } | |
2082 } | |
2083 | |
2084 VerificationType ClassVerifier::get_newarray_type( | |
2085 u2 index, u2 bci, TRAPS) { | |
2086 const char* from_bt[] = { | |
2087 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2088 }; | |
2089 if (index < T_BOOLEAN || index > T_LONG) { | |
2090 verify_error(bci, "Illegal newarray instruction"); | |
2091 return VerificationType::bogus_type(); | |
2092 } | |
2093 | |
2094 // from_bt[index] contains the array signature which has a length of 2 | |
2095 symbolHandle sig = oopFactory::new_symbol_handle( | |
2096 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
2097 return VerificationType::reference_type(sig); | |
2098 } | |
2099 | |
2100 void ClassVerifier::verify_anewarray( | |
2101 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2102 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2103 current_frame->pop_stack( | |
2104 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2105 | |
2106 VerificationType component_type = | |
2107 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2108 ResourceMark rm(THREAD); | |
2109 int length; | |
2110 char* arr_sig_str; | |
2111 if (component_type.is_array()) { // it's an array | |
2112 const char* component_name = component_type.name()->as_utf8(); | |
2113 // add one dimension to component | |
2114 length = (int)strlen(component_name) + 1; | |
2115 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2116 arr_sig_str[0] = '['; | |
2117 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2118 } else { // it's an object or interface | |
2119 const char* component_name = component_type.name()->as_utf8(); | |
2120 // add one dimension to component with 'L' prepended and ';' postpended. | |
2121 length = (int)strlen(component_name) + 3; | |
2122 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2123 arr_sig_str[0] = '['; | |
2124 arr_sig_str[1] = 'L'; | |
2125 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2126 arr_sig_str[length - 1] = ';'; | |
2127 } | |
2128 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
2129 arr_sig_str, length, CHECK_VERIFY(this)); | |
2130 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2131 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2132 } | |
2133 | |
2134 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2135 current_frame->get_local( | |
2136 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2137 current_frame->push_stack( | |
2138 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2139 } | |
2140 | |
2141 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2142 current_frame->get_local_2( | |
2143 index, VerificationType::long_type(), | |
2144 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2145 current_frame->push_stack_2( | |
2146 VerificationType::long_type(), | |
2147 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2148 } | |
2149 | |
2150 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2151 current_frame->get_local( | |
2152 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2153 current_frame->push_stack( | |
2154 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2155 } | |
2156 | |
2157 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2158 current_frame->get_local_2( | |
2159 index, VerificationType::double_type(), | |
2160 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2161 current_frame->push_stack_2( | |
2162 VerificationType::double_type(), | |
2163 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2164 } | |
2165 | |
2166 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2167 VerificationType type = current_frame->get_local( | |
2168 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2169 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2170 } | |
2171 | |
2172 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2173 current_frame->pop_stack( | |
2174 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2175 current_frame->set_local( | |
2176 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2177 } | |
2178 | |
2179 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2180 current_frame->pop_stack_2( | |
2181 VerificationType::long2_type(), | |
2182 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2183 current_frame->set_local_2( | |
2184 index, VerificationType::long_type(), | |
2185 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2186 } | |
2187 | |
2188 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2189 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2190 current_frame->set_local( | |
2191 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2192 } | |
2193 | |
2194 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2195 current_frame->pop_stack_2( | |
2196 VerificationType::double2_type(), | |
2197 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2198 current_frame->set_local_2( | |
2199 index, VerificationType::double_type(), | |
2200 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2201 } | |
2202 | |
2203 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2204 VerificationType type = current_frame->pop_stack( | |
2205 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2206 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2207 } | |
2208 | |
2209 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2210 VerificationType type = current_frame->get_local( | |
2211 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2212 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2213 } | |
2214 | |
2215 void ClassVerifier::verify_return_value( | |
2216 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2217 if (return_type == VerificationType::bogus_type()) { | |
2218 verify_error(bci, "Method expects a return value"); | |
2219 return; | |
2220 } | |
2221 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
2222 if (!match) { | |
2223 verify_error(bci, "Bad return type"); | |
2224 return; | |
2225 } | |
2226 } |