Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
author | stefank |
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date | Tue, 23 Nov 2010 13:22:55 -0800 |
parents | 9752a6549f2e |
children | 828eafbd85cc |
rev | line source |
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0 | 1 /* |
1579 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classFileStream.hpp" | |
27 #include "classfile/javaClasses.hpp" | |
28 #include "classfile/stackMapTable.hpp" | |
29 #include "classfile/systemDictionary.hpp" | |
30 #include "classfile/verifier.hpp" | |
31 #include "classfile/vmSymbols.hpp" | |
32 #include "interpreter/bytecodeStream.hpp" | |
33 #include "memory/oopFactory.hpp" | |
34 #include "memory/resourceArea.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
36 #include "oops/oop.inline.hpp" | |
37 #include "oops/typeArrayOop.hpp" | |
38 #include "prims/jvm.h" | |
39 #include "runtime/fieldDescriptor.hpp" | |
40 #include "runtime/handles.inline.hpp" | |
41 #include "runtime/hpi.hpp" | |
42 #include "runtime/interfaceSupport.hpp" | |
43 #include "runtime/javaCalls.hpp" | |
44 #include "runtime/orderAccess.hpp" | |
45 #include "runtime/os.hpp" | |
46 #ifdef TARGET_ARCH_x86 | |
47 # include "bytes_x86.hpp" | |
48 #endif | |
49 #ifdef TARGET_ARCH_sparc | |
50 # include "bytes_sparc.hpp" | |
51 #endif | |
52 #ifdef TARGET_ARCH_zero | |
53 # include "bytes_zero.hpp" | |
54 #endif | |
0 | 55 |
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56 #define NOFAILOVER_MAJOR_VERSION 51 |
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57 |
0 | 58 // Access to external entry for VerifyClassCodes - old byte code verifier |
59 | |
60 extern "C" { | |
61 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
62 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
63 } | |
64 | |
65 static void* volatile _verify_byte_codes_fn = NULL; | |
66 | |
67 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
68 | |
69 static void* verify_byte_codes_fn() { | |
70 if (_verify_byte_codes_fn == NULL) { | |
71 void *lib_handle = os::native_java_library(); | |
72 void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); | |
73 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
74 if (func == NULL) { | |
75 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
76 func = hpi::dll_lookup(lib_handle, "VerifyClassCodes"); | |
77 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); | |
78 } | |
79 } | |
80 return (void*)_verify_byte_codes_fn; | |
81 } | |
82 | |
83 | |
84 // Methods in Verifier | |
85 | |
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86 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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87 return (class_loader == NULL || !should_verify_class) ? |
0 | 88 BytecodeVerificationLocal : BytecodeVerificationRemote; |
89 } | |
90 | |
91 bool Verifier::relax_verify_for(oop loader) { | |
92 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
93 bool need_verify = | |
94 // verifyAll | |
95 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
96 // verifyRemote | |
97 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
98 return !need_verify; | |
99 } | |
100 | |
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101 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
0 | 102 ResourceMark rm(THREAD); |
103 HandleMark hm; | |
104 | |
105 symbolHandle exception_name; | |
106 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; | |
107 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
108 | |
109 const char* klassName = klass->external_name(); | |
110 | |
111 // If the class should be verified, first see if we can use the split | |
112 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
113 // is set, then call the inference verifier. | |
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114 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 115 if (TraceClassInitialization) { |
116 tty->print_cr("Start class verification for: %s", klassName); | |
117 } | |
118 if (UseSplitVerifier && | |
119 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
120 ClassVerifier split_verifier( | |
121 klass, message_buffer, message_buffer_len, THREAD); | |
122 split_verifier.verify_class(THREAD); | |
123 exception_name = split_verifier.result(); | |
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124 if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && |
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125 FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && |
0 | 126 (exception_name == vmSymbols::java_lang_VerifyError() || |
127 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
128 if (TraceClassInitialization) { | |
129 tty->print_cr( | |
130 "Fail over class verification to old verifier for: %s", klassName); | |
131 } | |
132 exception_name = inference_verify( | |
133 klass, message_buffer, message_buffer_len, THREAD); | |
134 } | |
135 } else { | |
136 exception_name = inference_verify( | |
137 klass, message_buffer, message_buffer_len, THREAD); | |
138 } | |
139 | |
140 if (TraceClassInitialization) { | |
141 if (HAS_PENDING_EXCEPTION) { | |
142 tty->print("Verification for %s has", klassName); | |
143 tty->print_cr(" exception pending %s ", | |
144 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
145 } else if (!exception_name.is_null()) { | |
146 tty->print_cr("Verification for %s failed", klassName); | |
147 } | |
148 tty->print_cr("End class verification for: %s", klassName); | |
149 } | |
150 } | |
151 | |
152 if (HAS_PENDING_EXCEPTION) { | |
153 return false; // use the existing exception | |
154 } else if (exception_name.is_null()) { | |
155 return true; // verifcation succeeded | |
156 } else { // VerifyError or ClassFormatError to be created and thrown | |
157 ResourceMark rm(THREAD); | |
158 instanceKlassHandle kls = | |
159 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
160 while (!kls.is_null()) { | |
161 if (kls == klass) { | |
162 // If the class being verified is the exception we're creating | |
163 // or one of it's superclasses, we're in trouble and are going | |
164 // to infinitely recurse when we try to initialize the exception. | |
165 // So bail out here by throwing the preallocated VM error. | |
166 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
167 } | |
168 kls = kls->super(); | |
169 } | |
170 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
171 THROW_MSG_(exception_name, message_buffer, false); | |
172 } | |
173 } | |
174 | |
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175 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
0 | 176 symbolOop name = klass->name(); |
1142 | 177 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 178 |
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179 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 180 // return if the class is a bootstrapping class |
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181 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 182 // We need to skip the following four for bootstraping |
183 name != vmSymbols::java_lang_Object() && | |
184 name != vmSymbols::java_lang_Class() && | |
185 name != vmSymbols::java_lang_String() && | |
186 name != vmSymbols::java_lang_Throwable() && | |
187 | |
188 // Can not verify the bytecodes for shared classes because they have | |
189 // already been rewritten to contain constant pool cache indices, | |
190 // which the verifier can't understand. | |
191 // Shared classes shouldn't have stackmaps either. | |
192 !klass()->is_shared() && | |
193 | |
194 // As of the fix for 4486457 we disable verification for all of the | |
195 // dynamically-generated bytecodes associated with the 1.4 | |
196 // reflection implementation, not just those associated with | |
197 // sun/reflect/SerializationConstructorAccessor. | |
198 // NOTE: this is called too early in the bootstrapping process to be | |
199 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
200 (refl_magic_klass == NULL || | |
201 !klass->is_subtype_of(refl_magic_klass) || | |
202 VerifyReflectionBytecodes) | |
203 ); | |
204 } | |
205 | |
206 symbolHandle Verifier::inference_verify( | |
207 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { | |
208 JavaThread* thread = (JavaThread*)THREAD; | |
209 JNIEnv *env = thread->jni_environment(); | |
210 | |
211 void* verify_func = verify_byte_codes_fn(); | |
212 | |
213 if (verify_func == NULL) { | |
214 jio_snprintf(message, message_len, "Could not link verifier"); | |
215 return vmSymbols::java_lang_VerifyError(); | |
216 } | |
217 | |
218 ResourceMark rm(THREAD); | |
219 if (ClassVerifier::_verify_verbose) { | |
220 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
221 } | |
222 | |
223 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
224 jint result; | |
225 | |
226 { | |
227 HandleMark hm(thread); | |
228 ThreadToNativeFromVM ttn(thread); | |
229 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
230 // code knows that we have left the VM | |
231 | |
232 if (_is_new_verify_byte_codes_fn) { | |
233 verify_byte_codes_fn_new_t func = | |
234 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
235 result = (*func)(env, cls, message, (int)message_len, | |
236 klass->major_version()); | |
237 } else { | |
238 verify_byte_codes_fn_t func = | |
239 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
240 result = (*func)(env, cls, message, (int)message_len); | |
241 } | |
242 } | |
243 | |
244 JNIHandles::destroy_local(cls); | |
245 | |
246 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
247 // to be changed (still return jboolean (unsigned char)), and result is | |
248 // 1 when verification is passed. | |
249 symbolHandle nh(NULL); | |
250 if (result == 0) { | |
251 return vmSymbols::java_lang_VerifyError(); | |
252 } else if (result == 1) { | |
253 return nh; // verified. | |
254 } else if (result == 2) { | |
255 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); | |
256 } else if (result == 3) { | |
257 return vmSymbols::java_lang_ClassFormatError(); | |
258 } else { | |
259 ShouldNotReachHere(); | |
260 return nh; | |
261 } | |
262 } | |
263 | |
264 // Methods in ClassVerifier | |
265 | |
266 bool ClassVerifier::_verify_verbose = false; | |
267 | |
268 ClassVerifier::ClassVerifier( | |
269 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
270 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), | |
271 _message_buffer_len(msg_len), _klass(klass) { | |
272 _this_type = VerificationType::reference_type(klass->name()); | |
273 } | |
274 | |
275 ClassVerifier::~ClassVerifier() { | |
276 } | |
277 | |
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278 VerificationType ClassVerifier::object_type() const { |
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279 return VerificationType::reference_type(vmSymbols::java_lang_Object()); |
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280 } |
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281 |
0 | 282 void ClassVerifier::verify_class(TRAPS) { |
283 if (_verify_verbose) { | |
284 tty->print_cr("Verifying class %s with new format", | |
285 _klass->external_name()); | |
286 } | |
287 | |
288 objArrayHandle methods(THREAD, _klass->methods()); | |
289 int num_methods = methods->length(); | |
290 | |
291 for (int index = 0; index < num_methods; index++) { | |
1570 | 292 // Check for recursive re-verification before each method. |
293 if (was_recursively_verified()) return; | |
294 | |
0 | 295 methodOop m = (methodOop)methods->obj_at(index); |
296 if (m->is_native() || m->is_abstract()) { | |
297 // If m is native or abstract, skip it. It is checked in class file | |
298 // parser that methods do not override a final method. | |
299 continue; | |
300 } | |
301 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
302 } | |
1570 | 303 |
304 if (_verify_verbose || TraceClassInitialization) { | |
305 if (was_recursively_verified()) | |
306 tty->print_cr("Recursive verification detected for: %s", | |
307 _klass->external_name()); | |
308 } | |
0 | 309 } |
310 | |
311 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
312 ResourceMark rm(THREAD); | |
313 _method = m; // initialize _method | |
314 if (_verify_verbose) { | |
315 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
316 } | |
317 | |
318 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
319 | |
320 int32_t max_stack = m->max_stack(); | |
321 int32_t max_locals = m->max_locals(); | |
322 constantPoolHandle cp(THREAD, m->constants()); | |
323 | |
324 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
325 class_format_error("Invalid method signature"); | |
326 return; | |
327 } | |
328 | |
329 // Initial stack map frame: offset is 0, stack is initially empty. | |
330 StackMapFrame current_frame(max_locals, max_stack, this); | |
331 // Set initial locals | |
332 VerificationType return_type = current_frame.set_locals_from_arg( | |
333 m, current_type(), CHECK_VERIFY(this)); | |
334 | |
335 int32_t stackmap_index = 0; // index to the stackmap array | |
336 | |
337 u4 code_length = m->code_size(); | |
338 | |
339 // Scan the bytecode and map each instruction's start offset to a number. | |
340 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
341 | |
342 int ex_min = code_length; | |
343 int ex_max = -1; | |
344 // Look through each item on the exception table. Each of the fields must refer | |
345 // to a legal instruction. | |
346 verify_exception_handler_table( | |
347 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
348 | |
349 // Look through each entry on the local variable table and make sure | |
350 // its range of code array offsets is valid. (4169817) | |
351 if (m->has_localvariable_table()) { | |
352 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
353 } | |
354 | |
355 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
356 StackMapStream stream(stackmap_data); | |
357 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
358 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
359 code_data, code_length, CHECK_VERIFY(this)); | |
360 | |
361 if (_verify_verbose) { | |
362 stackmap_table.print(); | |
363 } | |
364 | |
365 RawBytecodeStream bcs(m); | |
366 | |
367 // Scan the byte code linearly from the start to the end | |
368 bool no_control_flow = false; // Set to true when there is no direct control | |
369 // flow from current instruction to the next | |
370 // instruction in sequence | |
371 Bytecodes::Code opcode; | |
372 while (!bcs.is_last_bytecode()) { | |
1570 | 373 // Check for recursive re-verification before each bytecode. |
374 if (was_recursively_verified()) return; | |
375 | |
0 | 376 opcode = bcs.raw_next(); |
377 u2 bci = bcs.bci(); | |
378 | |
379 // Set current frame's offset to bci | |
380 current_frame.set_offset(bci); | |
381 | |
382 // Make sure every offset in stackmap table point to the beginning to | |
383 // an instruction. Match current_frame to stackmap_table entry with | |
384 // the same offset if exists. | |
385 stackmap_index = verify_stackmap_table( | |
386 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
387 no_control_flow, CHECK_VERIFY(this)); | |
388 | |
389 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
390 | |
391 // Merge with the next instruction | |
392 { | |
393 u2 index; | |
394 int target; | |
395 VerificationType type, type2; | |
396 VerificationType atype; | |
397 | |
398 #ifndef PRODUCT | |
399 if (_verify_verbose) { | |
400 current_frame.print(); | |
401 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
402 } | |
403 #endif | |
404 | |
405 // Make sure wide instruction is in correct format | |
406 if (bcs.is_wide()) { | |
407 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
408 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
409 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
410 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
411 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
412 opcode != Bytecodes::_dstore) { | |
413 verify_error(bci, "Bad wide instruction"); | |
414 return; | |
415 } | |
416 } | |
417 | |
418 switch (opcode) { | |
419 case Bytecodes::_nop : | |
420 no_control_flow = false; break; | |
421 case Bytecodes::_aconst_null : | |
422 current_frame.push_stack( | |
423 VerificationType::null_type(), CHECK_VERIFY(this)); | |
424 no_control_flow = false; break; | |
425 case Bytecodes::_iconst_m1 : | |
426 case Bytecodes::_iconst_0 : | |
427 case Bytecodes::_iconst_1 : | |
428 case Bytecodes::_iconst_2 : | |
429 case Bytecodes::_iconst_3 : | |
430 case Bytecodes::_iconst_4 : | |
431 case Bytecodes::_iconst_5 : | |
432 current_frame.push_stack( | |
433 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
434 no_control_flow = false; break; | |
435 case Bytecodes::_lconst_0 : | |
436 case Bytecodes::_lconst_1 : | |
437 current_frame.push_stack_2( | |
438 VerificationType::long_type(), | |
439 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
440 no_control_flow = false; break; | |
441 case Bytecodes::_fconst_0 : | |
442 case Bytecodes::_fconst_1 : | |
443 case Bytecodes::_fconst_2 : | |
444 current_frame.push_stack( | |
445 VerificationType::float_type(), CHECK_VERIFY(this)); | |
446 no_control_flow = false; break; | |
447 case Bytecodes::_dconst_0 : | |
448 case Bytecodes::_dconst_1 : | |
449 current_frame.push_stack_2( | |
450 VerificationType::double_type(), | |
451 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
452 no_control_flow = false; break; | |
453 case Bytecodes::_sipush : | |
454 case Bytecodes::_bipush : | |
455 current_frame.push_stack( | |
456 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
457 no_control_flow = false; break; | |
458 case Bytecodes::_ldc : | |
459 verify_ldc( | |
1565 | 460 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 461 cp, bci, CHECK_VERIFY(this)); |
462 no_control_flow = false; break; | |
463 case Bytecodes::_ldc_w : | |
464 case Bytecodes::_ldc2_w : | |
465 verify_ldc( | |
1565 | 466 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 467 cp, bci, CHECK_VERIFY(this)); |
468 no_control_flow = false; break; | |
469 case Bytecodes::_iload : | |
470 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
471 no_control_flow = false; break; | |
472 case Bytecodes::_iload_0 : | |
473 case Bytecodes::_iload_1 : | |
474 case Bytecodes::_iload_2 : | |
475 case Bytecodes::_iload_3 : | |
476 index = opcode - Bytecodes::_iload_0; | |
477 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
478 no_control_flow = false; break; | |
479 case Bytecodes::_lload : | |
480 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
481 no_control_flow = false; break; | |
482 case Bytecodes::_lload_0 : | |
483 case Bytecodes::_lload_1 : | |
484 case Bytecodes::_lload_2 : | |
485 case Bytecodes::_lload_3 : | |
486 index = opcode - Bytecodes::_lload_0; | |
487 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
488 no_control_flow = false; break; | |
489 case Bytecodes::_fload : | |
490 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
491 no_control_flow = false; break; | |
492 case Bytecodes::_fload_0 : | |
493 case Bytecodes::_fload_1 : | |
494 case Bytecodes::_fload_2 : | |
495 case Bytecodes::_fload_3 : | |
496 index = opcode - Bytecodes::_fload_0; | |
497 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
498 no_control_flow = false; break; | |
499 case Bytecodes::_dload : | |
500 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
501 no_control_flow = false; break; | |
502 case Bytecodes::_dload_0 : | |
503 case Bytecodes::_dload_1 : | |
504 case Bytecodes::_dload_2 : | |
505 case Bytecodes::_dload_3 : | |
506 index = opcode - Bytecodes::_dload_0; | |
507 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
508 no_control_flow = false; break; | |
509 case Bytecodes::_aload : | |
510 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
511 no_control_flow = false; break; | |
512 case Bytecodes::_aload_0 : | |
513 case Bytecodes::_aload_1 : | |
514 case Bytecodes::_aload_2 : | |
515 case Bytecodes::_aload_3 : | |
516 index = opcode - Bytecodes::_aload_0; | |
517 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
518 no_control_flow = false; break; | |
519 case Bytecodes::_iaload : | |
520 type = current_frame.pop_stack( | |
521 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
522 atype = current_frame.pop_stack( | |
523 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
524 if (!atype.is_int_array()) { | |
525 verify_error(bci, bad_type_msg, "iaload"); | |
526 return; | |
527 } | |
528 current_frame.push_stack( | |
529 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
530 no_control_flow = false; break; | |
531 case Bytecodes::_baload : | |
532 type = current_frame.pop_stack( | |
533 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
534 atype = current_frame.pop_stack( | |
535 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
536 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
537 verify_error(bci, bad_type_msg, "baload"); | |
538 return; | |
539 } | |
540 current_frame.push_stack( | |
541 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
542 no_control_flow = false; break; | |
543 case Bytecodes::_caload : | |
544 type = current_frame.pop_stack( | |
545 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
546 atype = current_frame.pop_stack( | |
547 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
548 if (!atype.is_char_array()) { | |
549 verify_error(bci, bad_type_msg, "caload"); | |
550 return; | |
551 } | |
552 current_frame.push_stack( | |
553 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
554 no_control_flow = false; break; | |
555 case Bytecodes::_saload : | |
556 type = current_frame.pop_stack( | |
557 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
558 atype = current_frame.pop_stack( | |
559 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
560 if (!atype.is_short_array()) { | |
561 verify_error(bci, bad_type_msg, "saload"); | |
562 return; | |
563 } | |
564 current_frame.push_stack( | |
565 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
566 no_control_flow = false; break; | |
567 case Bytecodes::_laload : | |
568 type = current_frame.pop_stack( | |
569 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
570 atype = current_frame.pop_stack( | |
571 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
572 if (!atype.is_long_array()) { | |
573 verify_error(bci, bad_type_msg, "laload"); | |
574 return; | |
575 } | |
576 current_frame.push_stack_2( | |
577 VerificationType::long_type(), | |
578 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
579 no_control_flow = false; break; | |
580 case Bytecodes::_faload : | |
581 type = current_frame.pop_stack( | |
582 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
583 atype = current_frame.pop_stack( | |
584 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
585 if (!atype.is_float_array()) { | |
586 verify_error(bci, bad_type_msg, "faload"); | |
587 return; | |
588 } | |
589 current_frame.push_stack( | |
590 VerificationType::float_type(), CHECK_VERIFY(this)); | |
591 no_control_flow = false; break; | |
592 case Bytecodes::_daload : | |
593 type = current_frame.pop_stack( | |
594 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
595 atype = current_frame.pop_stack( | |
596 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
597 if (!atype.is_double_array()) { | |
598 verify_error(bci, bad_type_msg, "daload"); | |
599 return; | |
600 } | |
601 current_frame.push_stack_2( | |
602 VerificationType::double_type(), | |
603 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
604 no_control_flow = false; break; | |
605 case Bytecodes::_aaload : { | |
606 type = current_frame.pop_stack( | |
607 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
608 atype = current_frame.pop_stack( | |
609 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
610 if (!atype.is_reference_array()) { | |
611 verify_error(bci, bad_type_msg, "aaload"); | |
612 return; | |
613 } | |
614 if (atype.is_null()) { | |
615 current_frame.push_stack( | |
616 VerificationType::null_type(), CHECK_VERIFY(this)); | |
617 } else { | |
618 VerificationType component = | |
619 atype.get_component(CHECK_VERIFY(this)); | |
620 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
621 } | |
622 no_control_flow = false; break; | |
623 } | |
624 case Bytecodes::_istore : | |
625 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
626 no_control_flow = false; break; | |
627 case Bytecodes::_istore_0 : | |
628 case Bytecodes::_istore_1 : | |
629 case Bytecodes::_istore_2 : | |
630 case Bytecodes::_istore_3 : | |
631 index = opcode - Bytecodes::_istore_0; | |
632 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
633 no_control_flow = false; break; | |
634 case Bytecodes::_lstore : | |
635 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
636 no_control_flow = false; break; | |
637 case Bytecodes::_lstore_0 : | |
638 case Bytecodes::_lstore_1 : | |
639 case Bytecodes::_lstore_2 : | |
640 case Bytecodes::_lstore_3 : | |
641 index = opcode - Bytecodes::_lstore_0; | |
642 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
643 no_control_flow = false; break; | |
644 case Bytecodes::_fstore : | |
645 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
646 no_control_flow = false; break; | |
647 case Bytecodes::_fstore_0 : | |
648 case Bytecodes::_fstore_1 : | |
649 case Bytecodes::_fstore_2 : | |
650 case Bytecodes::_fstore_3 : | |
651 index = opcode - Bytecodes::_fstore_0; | |
652 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
653 no_control_flow = false; break; | |
654 case Bytecodes::_dstore : | |
655 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
656 no_control_flow = false; break; | |
657 case Bytecodes::_dstore_0 : | |
658 case Bytecodes::_dstore_1 : | |
659 case Bytecodes::_dstore_2 : | |
660 case Bytecodes::_dstore_3 : | |
661 index = opcode - Bytecodes::_dstore_0; | |
662 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
663 no_control_flow = false; break; | |
664 case Bytecodes::_astore : | |
665 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
666 no_control_flow = false; break; | |
667 case Bytecodes::_astore_0 : | |
668 case Bytecodes::_astore_1 : | |
669 case Bytecodes::_astore_2 : | |
670 case Bytecodes::_astore_3 : | |
671 index = opcode - Bytecodes::_astore_0; | |
672 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
673 no_control_flow = false; break; | |
674 case Bytecodes::_iastore : | |
675 type = current_frame.pop_stack( | |
676 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
677 type2 = current_frame.pop_stack( | |
678 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
679 atype = current_frame.pop_stack( | |
680 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
681 if (!atype.is_int_array()) { | |
682 verify_error(bci, bad_type_msg, "iastore"); | |
683 return; | |
684 } | |
685 no_control_flow = false; break; | |
686 case Bytecodes::_bastore : | |
687 type = current_frame.pop_stack( | |
688 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
689 type2 = current_frame.pop_stack( | |
690 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
691 atype = current_frame.pop_stack( | |
692 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
693 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
694 verify_error(bci, bad_type_msg, "bastore"); | |
695 return; | |
696 } | |
697 no_control_flow = false; break; | |
698 case Bytecodes::_castore : | |
699 current_frame.pop_stack( | |
700 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
701 current_frame.pop_stack( | |
702 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
703 atype = current_frame.pop_stack( | |
704 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
705 if (!atype.is_char_array()) { | |
706 verify_error(bci, bad_type_msg, "castore"); | |
707 return; | |
708 } | |
709 no_control_flow = false; break; | |
710 case Bytecodes::_sastore : | |
711 current_frame.pop_stack( | |
712 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
713 current_frame.pop_stack( | |
714 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
715 atype = current_frame.pop_stack( | |
716 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
717 if (!atype.is_short_array()) { | |
718 verify_error(bci, bad_type_msg, "sastore"); | |
719 return; | |
720 } | |
721 no_control_flow = false; break; | |
722 case Bytecodes::_lastore : | |
723 current_frame.pop_stack_2( | |
724 VerificationType::long2_type(), | |
725 VerificationType::long_type(), CHECK_VERIFY(this)); | |
726 current_frame.pop_stack( | |
727 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
728 atype = current_frame.pop_stack( | |
729 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
730 if (!atype.is_long_array()) { | |
731 verify_error(bci, bad_type_msg, "lastore"); | |
732 return; | |
733 } | |
734 no_control_flow = false; break; | |
735 case Bytecodes::_fastore : | |
736 current_frame.pop_stack( | |
737 VerificationType::float_type(), CHECK_VERIFY(this)); | |
738 current_frame.pop_stack | |
739 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
740 atype = current_frame.pop_stack( | |
741 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
742 if (!atype.is_float_array()) { | |
743 verify_error(bci, bad_type_msg, "fastore"); | |
744 return; | |
745 } | |
746 no_control_flow = false; break; | |
747 case Bytecodes::_dastore : | |
748 current_frame.pop_stack_2( | |
749 VerificationType::double2_type(), | |
750 VerificationType::double_type(), CHECK_VERIFY(this)); | |
751 current_frame.pop_stack( | |
752 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
753 atype = current_frame.pop_stack( | |
754 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
755 if (!atype.is_double_array()) { | |
756 verify_error(bci, bad_type_msg, "dastore"); | |
757 return; | |
758 } | |
759 no_control_flow = false; break; | |
760 case Bytecodes::_aastore : | |
1955
1070423b51f3
6865028: Illegal instructions passing verification prior to 'invokespecial Object.<init>'
kamg
parents:
1678
diff
changeset
|
761 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 762 type2 = current_frame.pop_stack( |
763 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
764 atype = current_frame.pop_stack( | |
765 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
766 // more type-checking is done at runtime | |
767 if (!atype.is_reference_array()) { | |
768 verify_error(bci, bad_type_msg, "aastore"); | |
769 return; | |
770 } | |
771 // 4938384: relaxed constraint in JVMS 3nd edition. | |
772 no_control_flow = false; break; | |
773 case Bytecodes::_pop : | |
774 current_frame.pop_stack( | |
775 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
776 no_control_flow = false; break; | |
777 case Bytecodes::_pop2 : | |
778 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
779 if (type.is_category1()) { | |
780 current_frame.pop_stack( | |
781 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
782 } else if (type.is_category2_2nd()) { | |
783 current_frame.pop_stack( | |
784 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
785 } else { | |
786 verify_error(bci, bad_type_msg, "pop2"); | |
787 return; | |
788 } | |
789 no_control_flow = false; break; | |
790 case Bytecodes::_dup : | |
791 type = current_frame.pop_stack( | |
792 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
793 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
794 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
795 no_control_flow = false; break; | |
796 case Bytecodes::_dup_x1 : | |
797 type = current_frame.pop_stack( | |
798 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
799 type2 = current_frame.pop_stack( | |
800 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
801 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
802 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
803 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
804 no_control_flow = false; break; | |
805 case Bytecodes::_dup_x2 : | |
806 { | |
807 VerificationType type3; | |
808 type = current_frame.pop_stack( | |
809 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
810 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
811 if (type2.is_category1()) { | |
812 type3 = current_frame.pop_stack( | |
813 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
814 } else if (type2.is_category2_2nd()) { | |
815 type3 = current_frame.pop_stack( | |
816 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
817 } else { | |
818 verify_error(bci, bad_type_msg, "dup_x2"); | |
819 return; | |
820 } | |
821 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
822 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
823 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
824 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
825 no_control_flow = false; break; | |
826 } | |
827 case Bytecodes::_dup2 : | |
828 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
829 if (type.is_category1()) { | |
830 type2 = current_frame.pop_stack( | |
831 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
832 } else if (type.is_category2_2nd()) { | |
833 type2 = current_frame.pop_stack( | |
834 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
835 } else { | |
836 verify_error(bci, bad_type_msg, "dup2"); | |
837 return; | |
838 } | |
839 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
840 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
841 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
842 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
843 no_control_flow = false; break; | |
844 case Bytecodes::_dup2_x1 : | |
845 { | |
846 VerificationType type3; | |
847 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
848 if (type.is_category1()) { | |
849 type2 = current_frame.pop_stack( | |
850 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
851 } else if(type.is_category2_2nd()) { | |
852 type2 = current_frame.pop_stack | |
853 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
854 } else { | |
855 verify_error(bci, bad_type_msg, "dup2_x1"); | |
856 return; | |
857 } | |
858 type3 = current_frame.pop_stack( | |
859 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
860 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
861 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
862 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
863 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
864 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
865 no_control_flow = false; break; | |
866 } | |
867 case Bytecodes::_dup2_x2 : | |
868 { | |
869 VerificationType type3, type4; | |
870 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
871 if (type.is_category1()) { | |
872 type2 = current_frame.pop_stack( | |
873 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
874 } else if (type.is_category2_2nd()) { | |
875 type2 = current_frame.pop_stack( | |
876 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
877 } else { | |
878 verify_error(bci, bad_type_msg, "dup2_x2"); | |
879 return; | |
880 } | |
881 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
882 if (type3.is_category1()) { | |
883 type4 = current_frame.pop_stack( | |
884 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
885 } else if (type3.is_category2_2nd()) { | |
886 type4 = current_frame.pop_stack( | |
887 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
888 } else { | |
889 verify_error(bci, bad_type_msg, "dup2_x2"); | |
890 return; | |
891 } | |
892 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
893 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
894 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
895 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
896 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
897 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
898 no_control_flow = false; break; | |
899 } | |
900 case Bytecodes::_swap : | |
901 type = current_frame.pop_stack( | |
902 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
903 type2 = current_frame.pop_stack( | |
904 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
905 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
906 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
907 no_control_flow = false; break; | |
908 case Bytecodes::_iadd : | |
909 case Bytecodes::_isub : | |
910 case Bytecodes::_imul : | |
911 case Bytecodes::_idiv : | |
912 case Bytecodes::_irem : | |
913 case Bytecodes::_ishl : | |
914 case Bytecodes::_ishr : | |
915 case Bytecodes::_iushr : | |
916 case Bytecodes::_ior : | |
917 case Bytecodes::_ixor : | |
918 case Bytecodes::_iand : | |
919 current_frame.pop_stack( | |
920 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
921 // fall through | |
922 case Bytecodes::_ineg : | |
923 current_frame.pop_stack( | |
924 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
925 current_frame.push_stack( | |
926 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
927 no_control_flow = false; break; | |
928 case Bytecodes::_ladd : | |
929 case Bytecodes::_lsub : | |
930 case Bytecodes::_lmul : | |
931 case Bytecodes::_ldiv : | |
932 case Bytecodes::_lrem : | |
933 case Bytecodes::_land : | |
934 case Bytecodes::_lor : | |
935 case Bytecodes::_lxor : | |
936 current_frame.pop_stack_2( | |
937 VerificationType::long2_type(), | |
938 VerificationType::long_type(), CHECK_VERIFY(this)); | |
939 // fall through | |
940 case Bytecodes::_lneg : | |
941 current_frame.pop_stack_2( | |
942 VerificationType::long2_type(), | |
943 VerificationType::long_type(), CHECK_VERIFY(this)); | |
944 current_frame.push_stack_2( | |
945 VerificationType::long_type(), | |
946 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
947 no_control_flow = false; break; | |
948 case Bytecodes::_lshl : | |
949 case Bytecodes::_lshr : | |
950 case Bytecodes::_lushr : | |
951 current_frame.pop_stack( | |
952 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
953 current_frame.pop_stack_2( | |
954 VerificationType::long2_type(), | |
955 VerificationType::long_type(), CHECK_VERIFY(this)); | |
956 current_frame.push_stack_2( | |
957 VerificationType::long_type(), | |
958 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
959 no_control_flow = false; break; | |
960 case Bytecodes::_fadd : | |
961 case Bytecodes::_fsub : | |
962 case Bytecodes::_fmul : | |
963 case Bytecodes::_fdiv : | |
964 case Bytecodes::_frem : | |
965 current_frame.pop_stack( | |
966 VerificationType::float_type(), CHECK_VERIFY(this)); | |
967 // fall through | |
968 case Bytecodes::_fneg : | |
969 current_frame.pop_stack( | |
970 VerificationType::float_type(), CHECK_VERIFY(this)); | |
971 current_frame.push_stack( | |
972 VerificationType::float_type(), CHECK_VERIFY(this)); | |
973 no_control_flow = false; break; | |
974 case Bytecodes::_dadd : | |
975 case Bytecodes::_dsub : | |
976 case Bytecodes::_dmul : | |
977 case Bytecodes::_ddiv : | |
978 case Bytecodes::_drem : | |
979 current_frame.pop_stack_2( | |
980 VerificationType::double2_type(), | |
981 VerificationType::double_type(), CHECK_VERIFY(this)); | |
982 // fall through | |
983 case Bytecodes::_dneg : | |
984 current_frame.pop_stack_2( | |
985 VerificationType::double2_type(), | |
986 VerificationType::double_type(), CHECK_VERIFY(this)); | |
987 current_frame.push_stack_2( | |
988 VerificationType::double_type(), | |
989 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
990 no_control_flow = false; break; | |
991 case Bytecodes::_iinc : | |
992 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
993 no_control_flow = false; break; | |
994 case Bytecodes::_i2l : | |
995 type = current_frame.pop_stack( | |
996 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
997 current_frame.push_stack_2( | |
998 VerificationType::long_type(), | |
999 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1000 no_control_flow = false; break; | |
1001 case Bytecodes::_l2i : | |
1002 current_frame.pop_stack_2( | |
1003 VerificationType::long2_type(), | |
1004 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1005 current_frame.push_stack( | |
1006 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1007 no_control_flow = false; break; | |
1008 case Bytecodes::_i2f : | |
1009 current_frame.pop_stack( | |
1010 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1011 current_frame.push_stack( | |
1012 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1013 no_control_flow = false; break; | |
1014 case Bytecodes::_i2d : | |
1015 current_frame.pop_stack( | |
1016 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1017 current_frame.push_stack_2( | |
1018 VerificationType::double_type(), | |
1019 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1020 no_control_flow = false; break; | |
1021 case Bytecodes::_l2f : | |
1022 current_frame.pop_stack_2( | |
1023 VerificationType::long2_type(), | |
1024 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1025 current_frame.push_stack( | |
1026 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1027 no_control_flow = false; break; | |
1028 case Bytecodes::_l2d : | |
1029 current_frame.pop_stack_2( | |
1030 VerificationType::long2_type(), | |
1031 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1032 current_frame.push_stack_2( | |
1033 VerificationType::double_type(), | |
1034 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1035 no_control_flow = false; break; | |
1036 case Bytecodes::_f2i : | |
1037 current_frame.pop_stack( | |
1038 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1039 current_frame.push_stack( | |
1040 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1041 no_control_flow = false; break; | |
1042 case Bytecodes::_f2l : | |
1043 current_frame.pop_stack( | |
1044 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1045 current_frame.push_stack_2( | |
1046 VerificationType::long_type(), | |
1047 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1048 no_control_flow = false; break; | |
1049 case Bytecodes::_f2d : | |
1050 current_frame.pop_stack( | |
1051 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1052 current_frame.push_stack_2( | |
1053 VerificationType::double_type(), | |
1054 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1055 no_control_flow = false; break; | |
1056 case Bytecodes::_d2i : | |
1057 current_frame.pop_stack_2( | |
1058 VerificationType::double2_type(), | |
1059 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1060 current_frame.push_stack( | |
1061 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1062 no_control_flow = false; break; | |
1063 case Bytecodes::_d2l : | |
1064 current_frame.pop_stack_2( | |
1065 VerificationType::double2_type(), | |
1066 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1067 current_frame.push_stack_2( | |
1068 VerificationType::long_type(), | |
1069 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1070 no_control_flow = false; break; | |
1071 case Bytecodes::_d2f : | |
1072 current_frame.pop_stack_2( | |
1073 VerificationType::double2_type(), | |
1074 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1075 current_frame.push_stack( | |
1076 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1077 no_control_flow = false; break; | |
1078 case Bytecodes::_i2b : | |
1079 case Bytecodes::_i2c : | |
1080 case Bytecodes::_i2s : | |
1081 current_frame.pop_stack( | |
1082 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1083 current_frame.push_stack( | |
1084 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1085 no_control_flow = false; break; | |
1086 case Bytecodes::_lcmp : | |
1087 current_frame.pop_stack_2( | |
1088 VerificationType::long2_type(), | |
1089 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1090 current_frame.pop_stack_2( | |
1091 VerificationType::long2_type(), | |
1092 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1093 current_frame.push_stack( | |
1094 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1095 no_control_flow = false; break; | |
1096 case Bytecodes::_fcmpl : | |
1097 case Bytecodes::_fcmpg : | |
1098 current_frame.pop_stack( | |
1099 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1100 current_frame.pop_stack( | |
1101 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1102 current_frame.push_stack( | |
1103 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1104 no_control_flow = false; break; | |
1105 case Bytecodes::_dcmpl : | |
1106 case Bytecodes::_dcmpg : | |
1107 current_frame.pop_stack_2( | |
1108 VerificationType::double2_type(), | |
1109 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1110 current_frame.pop_stack_2( | |
1111 VerificationType::double2_type(), | |
1112 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1113 current_frame.push_stack( | |
1114 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1115 no_control_flow = false; break; | |
1116 case Bytecodes::_if_icmpeq: | |
1117 case Bytecodes::_if_icmpne: | |
1118 case Bytecodes::_if_icmplt: | |
1119 case Bytecodes::_if_icmpge: | |
1120 case Bytecodes::_if_icmpgt: | |
1121 case Bytecodes::_if_icmple: | |
1122 current_frame.pop_stack( | |
1123 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1124 // fall through | |
1125 case Bytecodes::_ifeq: | |
1126 case Bytecodes::_ifne: | |
1127 case Bytecodes::_iflt: | |
1128 case Bytecodes::_ifge: | |
1129 case Bytecodes::_ifgt: | |
1130 case Bytecodes::_ifle: | |
1131 current_frame.pop_stack( | |
1132 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1133 target = bcs.dest(); | |
1134 stackmap_table.check_jump_target( | |
1135 ¤t_frame, target, CHECK_VERIFY(this)); | |
1136 no_control_flow = false; break; | |
1137 case Bytecodes::_if_acmpeq : | |
1138 case Bytecodes::_if_acmpne : | |
1139 current_frame.pop_stack( | |
1140 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1141 // fall through | |
1142 case Bytecodes::_ifnull : | |
1143 case Bytecodes::_ifnonnull : | |
1144 current_frame.pop_stack( | |
1145 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1146 target = bcs.dest(); | |
1147 stackmap_table.check_jump_target | |
1148 (¤t_frame, target, CHECK_VERIFY(this)); | |
1149 no_control_flow = false; break; | |
1150 case Bytecodes::_goto : | |
1151 target = bcs.dest(); | |
1152 stackmap_table.check_jump_target( | |
1153 ¤t_frame, target, CHECK_VERIFY(this)); | |
1154 no_control_flow = true; break; | |
1155 case Bytecodes::_goto_w : | |
1156 target = bcs.dest_w(); | |
1157 stackmap_table.check_jump_target( | |
1158 ¤t_frame, target, CHECK_VERIFY(this)); | |
1159 no_control_flow = true; break; | |
1160 case Bytecodes::_tableswitch : | |
1161 case Bytecodes::_lookupswitch : | |
1162 verify_switch( | |
1163 &bcs, code_length, code_data, ¤t_frame, | |
1164 &stackmap_table, CHECK_VERIFY(this)); | |
1165 no_control_flow = true; break; | |
1166 case Bytecodes::_ireturn : | |
1167 type = current_frame.pop_stack( | |
1168 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1169 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1170 no_control_flow = true; break; | |
1171 case Bytecodes::_lreturn : | |
1172 type2 = current_frame.pop_stack( | |
1173 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1174 type = current_frame.pop_stack( | |
1175 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1176 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1177 no_control_flow = true; break; | |
1178 case Bytecodes::_freturn : | |
1179 type = current_frame.pop_stack( | |
1180 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1181 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1182 no_control_flow = true; break; | |
1183 case Bytecodes::_dreturn : | |
1184 type2 = current_frame.pop_stack( | |
1185 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1186 type = current_frame.pop_stack( | |
1187 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1188 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1189 no_control_flow = true; break; | |
1190 case Bytecodes::_areturn : | |
1191 type = current_frame.pop_stack( | |
1192 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1193 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1194 no_control_flow = true; break; | |
1195 case Bytecodes::_return : | |
1196 if (return_type != VerificationType::bogus_type()) { | |
1197 verify_error(bci, "Method expects no return value"); | |
1198 return; | |
1199 } | |
1200 // Make sure "this" has been initialized if current method is an | |
1201 // <init> | |
1202 if (_method->name() == vmSymbols::object_initializer_name() && | |
1203 current_frame.flag_this_uninit()) { | |
1204 verify_error(bci, | |
1205 "Constructor must call super() or this() before return"); | |
1206 return; | |
1207 } | |
1208 no_control_flow = true; break; | |
1209 case Bytecodes::_getstatic : | |
1210 case Bytecodes::_putstatic : | |
1211 case Bytecodes::_getfield : | |
1212 case Bytecodes::_putfield : | |
1213 verify_field_instructions( | |
1214 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1215 no_control_flow = false; break; | |
1216 case Bytecodes::_invokevirtual : | |
1217 case Bytecodes::_invokespecial : | |
1218 case Bytecodes::_invokestatic : | |
1219 verify_invoke_instructions( | |
1220 &bcs, code_length, ¤t_frame, | |
1221 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1222 no_control_flow = false; break; | |
1223 case Bytecodes::_invokeinterface : | |
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1224 case Bytecodes::_invokedynamic : |
0 | 1225 verify_invoke_instructions( |
1226 &bcs, code_length, ¤t_frame, | |
1227 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1228 no_control_flow = false; break; | |
1229 case Bytecodes::_new : | |
1230 { | |
1565 | 1231 index = bcs.get_index_u2(); |
0 | 1232 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1233 VerificationType new_class_type = | |
1234 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1235 if (!new_class_type.is_object()) { | |
1236 verify_error(bci, "Illegal new instruction"); | |
1237 return; | |
1238 } | |
1239 type = VerificationType::uninitialized_type(bci); | |
1240 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1241 no_control_flow = false; break; | |
1242 } | |
1243 case Bytecodes::_newarray : | |
1244 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1245 current_frame.pop_stack( | |
1246 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1247 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1248 no_control_flow = false; break; | |
1249 case Bytecodes::_anewarray : | |
1250 verify_anewarray( | |
1565 | 1251 bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1252 no_control_flow = false; break; |
1253 case Bytecodes::_arraylength : | |
1254 type = current_frame.pop_stack( | |
1255 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1256 if (!(type.is_null() || type.is_array())) { |
0 | 1257 verify_error(bci, bad_type_msg, "arraylength"); |
1258 } | |
1259 current_frame.push_stack( | |
1260 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1261 no_control_flow = false; break; | |
1262 case Bytecodes::_checkcast : | |
1263 { | |
1565 | 1264 index = bcs.get_index_u2(); |
0 | 1265 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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|
1266 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1267 VerificationType klass_type = cp_index_to_type( |
1268 index, cp, CHECK_VERIFY(this)); | |
1269 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1270 no_control_flow = false; break; | |
1271 } | |
1272 case Bytecodes::_instanceof : { | |
1565 | 1273 index = bcs.get_index_u2(); |
0 | 1274 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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1275 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1276 current_frame.push_stack( |
1277 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1278 no_control_flow = false; break; | |
1279 } | |
1280 case Bytecodes::_monitorenter : | |
1281 case Bytecodes::_monitorexit : | |
1282 current_frame.pop_stack( | |
1283 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1284 no_control_flow = false; break; | |
1285 case Bytecodes::_multianewarray : | |
1286 { | |
1565 | 1287 index = bcs.get_index_u2(); |
0 | 1288 u2 dim = *(bcs.bcp()+3); |
1289 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1290 VerificationType new_array_type = | |
1291 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1292 if (!new_array_type.is_array()) { | |
1293 verify_error(bci, | |
1294 "Illegal constant pool index in multianewarray instruction"); | |
1295 return; | |
1296 } | |
1297 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1298 verify_error(bci, | |
1299 "Illegal dimension in multianewarray instruction"); | |
1300 return; | |
1301 } | |
1302 for (int i = 0; i < dim; i++) { | |
1303 current_frame.pop_stack( | |
1304 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1305 } | |
1306 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1307 no_control_flow = false; break; | |
1308 } | |
1309 case Bytecodes::_athrow : | |
1310 type = VerificationType::reference_type( | |
1311 vmSymbols::java_lang_Throwable()); | |
1312 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1313 no_control_flow = true; break; | |
1314 default: | |
1315 // We only need to check the valid bytecodes in class file. | |
1316 // And jsr and ret are not in the new class file format in JDK1.5. | |
1317 verify_error(bci, "Bad instruction"); | |
1318 no_control_flow = false; | |
1319 return; | |
1320 } // end switch | |
1321 } // end Merge with the next instruction | |
1322 | |
1323 // Look for possible jump target in exception handlers and see if it | |
1324 // matches current_frame | |
1325 if (bci >= ex_min && bci < ex_max) { | |
1326 verify_exception_handler_targets( | |
1327 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1328 } | |
1329 } // end while | |
1330 | |
1331 // Make sure that control flow does not fall through end of the method | |
1332 if (!no_control_flow) { | |
1333 verify_error(code_length, "Control flow falls through code end"); | |
1334 return; | |
1335 } | |
1336 } | |
1337 | |
1338 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1339 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1340 memset(code_data, 0, sizeof(char) * code_length); | |
1341 RawBytecodeStream bcs(m); | |
1342 | |
1343 while (!bcs.is_last_bytecode()) { | |
1344 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1345 int bci = bcs.bci(); | |
1565 | 1346 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1347 code_data[bci] = NEW_OFFSET; |
1348 } else { | |
1349 code_data[bci] = BYTECODE_OFFSET; | |
1350 } | |
1351 } else { | |
1352 verify_error(bcs.bci(), "Bad instruction"); | |
1353 return NULL; | |
1354 } | |
1355 } | |
1356 | |
1357 return code_data; | |
1358 } | |
1359 | |
1360 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1361 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1362 constantPoolHandle cp (THREAD, _method->constants()); | |
1363 | |
1364 if (exhandlers() != NULL) { | |
1365 for(int i = 0; i < exhandlers->length();) { | |
1366 u2 start_pc = exhandlers->int_at(i++); | |
1367 u2 end_pc = exhandlers->int_at(i++); | |
1368 u2 handler_pc = exhandlers->int_at(i++); | |
1369 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1370 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1371 return; | |
1372 } | |
1373 if (end_pc != code_length) { // special case: end_pc == code_length | |
1374 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1375 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1376 return; | |
1377 } | |
1378 } | |
1379 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1380 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1381 return; | |
1382 } | |
1383 int catch_type_index = exhandlers->int_at(i++); | |
1384 if (catch_type_index != 0) { | |
1385 VerificationType catch_type = cp_index_to_type( | |
1386 catch_type_index, cp, CHECK_VERIFY(this)); | |
1387 VerificationType throwable = | |
1388 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1389 bool is_subclass = throwable.is_assignable_from( | |
1390 catch_type, current_class(), CHECK_VERIFY(this)); | |
1391 if (!is_subclass) { | |
1392 // 4286534: should throw VerifyError according to recent spec change | |
1393 verify_error( | |
1394 "Catch type is not a subclass of Throwable in handler %d", | |
1395 handler_pc); | |
1396 return; | |
1397 } | |
1398 } | |
1399 if (start_pc < min) min = start_pc; | |
1400 if (end_pc > max) max = end_pc; | |
1401 } | |
1402 } | |
1403 } | |
1404 | |
1405 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1406 int localvariable_table_length = _method()->localvariable_table_length(); | |
1407 if (localvariable_table_length > 0) { | |
1408 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1409 for (int i = 0; i < localvariable_table_length; i++) { | |
1410 u2 start_bci = table[i].start_bci; | |
1411 u2 length = table[i].length; | |
1412 | |
1413 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1414 class_format_error( | |
1415 "Illegal local variable table start_pc %d", start_bci); | |
1416 return; | |
1417 } | |
1418 u4 end_bci = (u4)(start_bci + length); | |
1419 if (end_bci != code_length) { | |
1420 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1421 class_format_error( "Illegal local variable table length %d", length); | |
1422 return; | |
1423 } | |
1424 } | |
1425 } | |
1426 } | |
1427 } | |
1428 | |
1429 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1430 StackMapFrame* current_frame, | |
1431 StackMapTable* stackmap_table, | |
1432 bool no_control_flow, TRAPS) { | |
1433 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1434 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1435 if (no_control_flow && this_offset > bci) { | |
1436 verify_error(bci, "Expecting a stack map frame"); | |
1437 return 0; | |
1438 } | |
1439 if (this_offset == bci) { | |
1440 // See if current stack map can be assigned to the frame in table. | |
1441 // current_frame is the stackmap frame got from the last instruction. | |
1442 // If matched, current_frame will be updated by this method. | |
1443 bool match = stackmap_table->match_stackmap( | |
1444 current_frame, this_offset, stackmap_index, | |
1445 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1446 if (!match) { | |
1447 // report type error | |
1448 verify_error(bci, "Instruction type does not match stack map"); | |
1449 return 0; | |
1450 } | |
1451 stackmap_index++; | |
1452 } else if (this_offset < bci) { | |
1453 // current_offset should have met this_offset. | |
1454 class_format_error("Bad stack map offset %d", this_offset); | |
1455 return 0; | |
1456 } | |
1457 } else if (no_control_flow) { | |
1458 verify_error(bci, "Expecting a stack map frame"); | |
1459 return 0; | |
1460 } | |
1461 return stackmap_index; | |
1462 } | |
1463 | |
1464 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1465 StackMapTable* stackmap_table, TRAPS) { | |
1466 constantPoolHandle cp (THREAD, _method->constants()); | |
1467 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1468 if (exhandlers() != NULL) { | |
1469 for(int i = 0; i < exhandlers->length();) { | |
1470 u2 start_pc = exhandlers->int_at(i++); | |
1471 u2 end_pc = exhandlers->int_at(i++); | |
1472 u2 handler_pc = exhandlers->int_at(i++); | |
1473 int catch_type_index = exhandlers->int_at(i++); | |
1474 if(bci >= start_pc && bci < end_pc) { | |
1475 u1 flags = current_frame->flags(); | |
1476 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1477 | |
1478 ResourceMark rm(THREAD); | |
1479 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1480 if (catch_type_index != 0) { | |
1481 // We know that this index refers to a subclass of Throwable | |
1482 VerificationType catch_type = cp_index_to_type( | |
1483 catch_type_index, cp, CHECK_VERIFY(this)); | |
1484 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1485 } else { | |
1486 VerificationType throwable = | |
1487 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1488 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1489 } | |
1490 bool match = stackmap_table->match_stackmap( | |
1491 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1492 if (!match) { | |
1493 verify_error(bci, | |
1494 "Stack map does not match the one at exception handler %d", | |
1495 handler_pc); | |
1496 return; | |
1497 } | |
1498 } | |
1499 } | |
1500 } | |
1501 } | |
1502 | |
1503 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1504 int nconstants = cp->length(); | |
1505 if ((index <= 0) || (index >= nconstants)) { | |
1506 verify_error("Illegal constant pool index %d in class %s", | |
1507 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1508 return; | |
1509 } | |
1510 } | |
1511 | |
1512 void ClassVerifier::verify_cp_type( | |
1513 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1514 | |
1515 // In some situations, bytecode rewriting may occur while we're verifying. | |
1516 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1517 // instead. Be sure we don't pick up such indices by accident. |
1518 // We must check was_recursively_verified() before we get here. | |
1519 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1520 |
1521 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1522 unsigned int tag = cp->tag_at(index).value(); | |
1523 if ((types & (1 << tag)) == 0) { | |
1524 verify_error( | |
1525 "Illegal type at constant pool entry %d in class %s", | |
1526 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1527 return; | |
1528 } | |
1529 } | |
1530 | |
1531 void ClassVerifier::verify_cp_class_type( | |
1532 int index, constantPoolHandle cp, TRAPS) { | |
1533 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1534 constantTag tag = cp->tag_at(index); | |
1535 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1536 verify_error("Illegal type at constant pool entry %d in class %s", | |
1537 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1538 return; | |
1539 } | |
1540 } | |
1541 | |
1542 void ClassVerifier::format_error_message( | |
1543 const char* fmt, int offset, va_list va) { | |
1544 ResourceMark rm(_thread); | |
1545 stringStream message(_message, _message_buffer_len); | |
1546 message.vprint(fmt, va); | |
1547 if (!_method.is_null()) { | |
1548 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1549 } | |
1550 if (offset != -1) { | |
1551 message.print(" at offset %d", offset); | |
1552 } | |
1553 } | |
1554 | |
1555 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1556 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1557 va_list va; | |
1558 va_start(va, fmt); | |
1559 format_error_message(fmt, offset, va); | |
1560 va_end(va); | |
1561 } | |
1562 | |
1563 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1564 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1565 va_list va; | |
1566 va_start(va, fmt); | |
1567 format_error_message(fmt, -1, va); | |
1568 va_end(va); | |
1569 } | |
1570 | |
1571 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1572 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1573 va_list va; | |
1574 va_start(va, msg); | |
1575 format_error_message(msg, -1, va); | |
1576 va_end(va); | |
1577 } | |
1578 | |
1579 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
1580 // Get current loader and protection domain first. | |
1581 oop loader = current_class()->class_loader(); | |
1582 oop protection_domain = current_class()->protection_domain(); | |
1583 | |
1584 return SystemDictionary::resolve_or_fail( | |
1585 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1586 true, CHECK_NULL); | |
1587 } | |
1588 | |
1589 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1590 klassOop target_class, | |
1591 symbolOop field_name, | |
1592 symbolOop field_sig, | |
1593 bool is_method) { | |
1594 No_Safepoint_Verifier nosafepoint; | |
1595 | |
1596 // If target class isn't a super class of this class, we don't worry about this case | |
1597 if (!this_class->is_subclass_of(target_class)) { | |
1598 return false; | |
1599 } | |
1600 // Check if the specified method or field is protected | |
1601 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1602 fieldDescriptor fd; | |
1603 if (is_method) { | |
1604 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1605 if (m != NULL && m->is_protected()) { | |
1606 if (!this_class->is_same_class_package(m->method_holder())) { | |
1607 return true; | |
1608 } | |
1609 } | |
1610 } else { | |
1611 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1612 if(member_klass != NULL && fd.is_protected()) { | |
1613 if (!this_class->is_same_class_package(member_klass)) { | |
1614 return true; | |
1615 } | |
1616 } | |
1617 } | |
1618 return false; | |
1619 } | |
1620 | |
1621 void ClassVerifier::verify_ldc( | |
1622 int opcode, u2 index, StackMapFrame *current_frame, | |
1623 constantPoolHandle cp, u2 bci, TRAPS) { | |
1624 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1625 constantTag tag = cp->tag_at(index); | |
1626 unsigned int types; | |
1627 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1628 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1629 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1602 | 1630 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1631 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1632 // Note: The class file parser already verified the legality of | |
1633 // MethodHandle and MethodType constants. | |
0 | 1634 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
1635 } | |
1636 } else { | |
1637 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1638 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1639 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1640 } | |
431
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1641 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
1955
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|
1642 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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|
1643 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1644 current_frame->push_stack( |
1645 VerificationType::reference_type( | |
1646 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1647 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1648 current_frame->push_stack( | |
1649 VerificationType::reference_type( | |
1650 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1651 } else if (tag.is_int()) { | |
1652 current_frame->push_stack( | |
1653 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1654 } else if (tag.is_float()) { | |
1655 current_frame->push_stack( | |
1656 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1657 } else if (tag.is_double()) { | |
1658 current_frame->push_stack_2( | |
1659 VerificationType::double_type(), | |
1660 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1661 } else if (tag.is_long()) { | |
1662 current_frame->push_stack_2( | |
1663 VerificationType::long_type(), | |
1664 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 1665 } else if (tag.is_method_handle()) { |
1666 current_frame->push_stack( | |
1667 VerificationType::reference_type( | |
1668 vmSymbols::java_dyn_MethodHandle()), CHECK_VERIFY(this)); | |
1669 } else if (tag.is_method_type()) { | |
1670 current_frame->push_stack( | |
1671 VerificationType::reference_type( | |
1672 vmSymbols::java_dyn_MethodType()), CHECK_VERIFY(this)); | |
0 | 1673 } else { |
1674 verify_error(bci, "Invalid index in ldc"); | |
1675 return; | |
1676 } | |
1677 } | |
1678 | |
1679 void ClassVerifier::verify_switch( | |
1680 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1681 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1682 int bci = bcs->bci(); | |
1683 address bcp = bcs->bcp(); | |
1684 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1685 | |
1686 // 4639449 & 4647081: padding bytes must be 0 | |
1687 u2 padding_offset = 1; | |
1688 while ((bcp + padding_offset) < aligned_bcp) { | |
1689 if(*(bcp + padding_offset) != 0) { | |
1690 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1691 return; | |
1692 } | |
1693 padding_offset++; | |
1694 } | |
1695 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1696 int keys, delta; | |
1697 current_frame->pop_stack( | |
1698 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 1699 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 1700 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
1701 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1702 if (low > high) { | |
1703 verify_error(bci, | |
1704 "low must be less than or equal to high in tableswitch"); | |
1705 return; | |
1706 } | |
1707 keys = high - low + 1; | |
1708 if (keys < 0) { | |
1709 verify_error(bci, "too many keys in tableswitch"); | |
1710 return; | |
1711 } | |
1712 delta = 1; | |
1713 } else { | |
1714 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1715 if (keys < 0) { | |
1716 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1717 return; | |
1718 } | |
1719 delta = 2; | |
1720 // Make sure that the lookupswitch items are sorted | |
1721 for (int i = 0; i < (keys - 1); i++) { | |
1722 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1723 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1724 if (this_key >= next_key) { | |
1725 verify_error(bci, "Bad lookupswitch instruction"); | |
1726 return; | |
1727 } | |
1728 } | |
1729 } | |
1730 int target = bci + default_offset; | |
1731 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1732 for (int i = 0; i < keys; i++) { | |
1733 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1734 stackmap_table->check_jump_target( | |
1735 current_frame, target, CHECK_VERIFY(this)); | |
1736 } | |
1737 } | |
1738 | |
1739 bool ClassVerifier::name_in_supers( | |
1740 symbolOop ref_name, instanceKlassHandle current) { | |
1741 klassOop super = current->super(); | |
1742 while (super != NULL) { | |
1743 if (super->klass_part()->name() == ref_name) { | |
1744 return true; | |
1745 } | |
1746 super = super->klass_part()->super(); | |
1747 } | |
1748 return false; | |
1749 } | |
1750 | |
1751 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1752 StackMapFrame* current_frame, | |
1753 constantPoolHandle cp, | |
1754 TRAPS) { | |
1565 | 1755 u2 index = bcs->get_index_u2(); |
0 | 1756 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); |
1757 | |
1758 // Get field name and signature | |
1759 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
1760 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
1761 | |
1762 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1763 class_format_error( | |
1764 "Invalid signature for field in class %s referenced " | |
1765 "from constant pool index %d", _klass->external_name(), index); | |
1766 return; | |
1767 } | |
1768 | |
1769 // Get referenced class type | |
1770 VerificationType ref_class_type = cp_ref_index_to_type( | |
1771 index, cp, CHECK_VERIFY(this)); | |
1772 if (!ref_class_type.is_object()) { | |
1773 verify_error( | |
1774 "Expecting reference to class in class %s at constant pool index %d", | |
1775 _klass->external_name(), index); | |
1776 return; | |
1777 } | |
1778 VerificationType target_class_type = ref_class_type; | |
1779 | |
1780 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1781 "buffer type must match VerificationType size"); | |
1782 uintptr_t field_type_buffer[2]; | |
1783 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1784 // If we make a VerificationType[2] array directly, the compiler calls | |
1785 // to the c-runtime library to do the allocation instead of just | |
1786 // stack allocating it. Plus it would run constructors. This shows up | |
1787 // in performance profiles. | |
1788 | |
1789 SignatureStream sig_stream(field_sig, false); | |
1790 VerificationType stack_object_type; | |
1791 int n = change_sig_to_verificationType( | |
1792 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1793 u2 bci = bcs->bci(); | |
1794 bool is_assignable; | |
1565 | 1795 switch (bcs->raw_code()) { |
0 | 1796 case Bytecodes::_getstatic: { |
1797 for (int i = 0; i < n; i++) { | |
1798 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1799 } | |
1800 break; | |
1801 } | |
1802 case Bytecodes::_putstatic: { | |
1803 for (int i = n - 1; i >= 0; i--) { | |
1804 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1805 } | |
1806 break; | |
1807 } | |
1808 case Bytecodes::_getfield: { | |
1809 stack_object_type = current_frame->pop_stack( | |
1810 target_class_type, CHECK_VERIFY(this)); | |
1811 for (int i = 0; i < n; i++) { | |
1812 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1813 } | |
1814 goto check_protected; | |
1815 } | |
1816 case Bytecodes::_putfield: { | |
1817 for (int i = n - 1; i >= 0; i--) { | |
1818 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1819 } | |
1820 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1821 | |
1822 // The JVMS 2nd edition allows field initialization before the superclass | |
1823 // initializer, if the field is defined within the current class. | |
1824 fieldDescriptor fd; | |
1825 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1826 target_class_type.equals(current_type()) && | |
1827 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
1828 stack_object_type = current_type(); | |
1829 } | |
1830 is_assignable = target_class_type.is_assignable_from( | |
1831 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1832 if (!is_assignable) { | |
1833 verify_error(bci, "Bad type on operand stack in putfield"); | |
1834 return; | |
1835 } | |
1836 } | |
1837 check_protected: { | |
1838 if (_this_type == stack_object_type) | |
1839 break; // stack_object_type must be assignable to _current_class_type | |
1840 symbolHandle ref_class_name = symbolHandle(THREAD, | |
1841 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
1842 if (!name_in_supers(ref_class_name(), current_class())) | |
1843 // stack_object_type must be assignable to _current_class_type since: | |
1844 // 1. stack_object_type must be assignable to ref_class. | |
1845 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1846 // be a superclass of it. See revised JVMS 5.4.4. | |
1847 break; | |
1848 | |
1849 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
1850 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
1851 field_sig(), false)) { | |
1852 // It's protected access, check if stack object is assignable to | |
1853 // current class. | |
1854 is_assignable = current_type().is_assignable_from( | |
1855 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1856 if (!is_assignable) { | |
1857 verify_error(bci, "Bad access to protected data in getfield"); | |
1858 return; | |
1859 } | |
1860 } | |
1861 break; | |
1862 } | |
1863 default: ShouldNotReachHere(); | |
1864 } | |
1865 } | |
1866 | |
1867 void ClassVerifier::verify_invoke_init( | |
1868 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1869 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1870 constantPoolHandle cp, TRAPS) { | |
1871 u2 bci = bcs->bci(); | |
1872 VerificationType type = current_frame->pop_stack( | |
1873 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1874 if (type == VerificationType::uninitialized_this_type()) { | |
1875 // The method must be an <init> method of either this class, or one of its | |
1876 // superclasses | |
1677 | 1877 if (ref_class_type.name() != current_class()->name() && |
1878 !name_in_supers(ref_class_type.name(), current_class())) { | |
0 | 1879 verify_error(bci, "Bad <init> method call"); |
1880 return; | |
1881 } | |
1882 current_frame->initialize_object(type, current_type()); | |
1883 *this_uninit = true; | |
1884 } else if (type.is_uninitialized()) { | |
1885 u2 new_offset = type.bci(); | |
1886 address new_bcp = bcs->bcp() - bci + new_offset; | |
1887 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1888 verify_error(new_offset, "Expecting new instruction"); | |
1889 return; | |
1890 } | |
1891 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1892 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1893 | |
1894 // The method must be an <init> method of the indicated class | |
1895 VerificationType new_class_type = cp_index_to_type( | |
1896 new_class_index, cp, CHECK_VERIFY(this)); | |
1897 if (!new_class_type.equals(ref_class_type)) { | |
1898 verify_error(bci, "Call to wrong <init> method"); | |
1899 return; | |
1900 } | |
1901 // According to the VM spec, if the referent class is a superclass of the | |
1902 // current class, and is in a different runtime package, and the method is | |
1903 // protected, then the objectref must be the current class or a subclass | |
1904 // of the current class. | |
1905 VerificationType objectref_type = new_class_type; | |
1906 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1907 klassOop ref_klass = load_class( | |
1908 ref_class_type.name(), CHECK_VERIFY(this)); | |
1909 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1910 vmSymbols::object_initializer_name(), | |
1565 | 1911 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 1912 instanceKlassHandle mh(THREAD, m->method_holder()); |
1913 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1914 bool assignable = current_type().is_assignable_from( | |
1915 objectref_type, current_class(), CHECK_VERIFY(this)); | |
1916 if (!assignable) { | |
1917 verify_error(bci, "Bad access to protected <init> method"); | |
1918 return; | |
1919 } | |
1920 } | |
1921 } | |
1922 current_frame->initialize_object(type, new_class_type); | |
1923 } else { | |
1924 verify_error(bci, "Bad operand type when invoking <init>"); | |
1925 return; | |
1926 } | |
1927 } | |
1928 | |
1929 void ClassVerifier::verify_invoke_instructions( | |
1930 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1931 bool *this_uninit, VerificationType return_type, | |
1932 constantPoolHandle cp, TRAPS) { | |
1933 // Make sure the constant pool item is the right type | |
1565 | 1934 u2 index = bcs->get_index_u2(); |
1935 Bytecodes::Code opcode = bcs->raw_code(); | |
0 | 1936 unsigned int types = (opcode == Bytecodes::_invokeinterface |
1937 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1938 : opcode == Bytecodes::_invokedynamic |
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1939 ? ((AllowTransitionalJSR292 ? 1 << JVM_CONSTANT_NameAndType : 0) |
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1940 |1 << JVM_CONSTANT_InvokeDynamic) |
0 | 1941 : 1 << JVM_CONSTANT_Methodref); |
1942 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1943 | |
1944 // Get method name and signature | |
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1945 symbolHandle method_name(THREAD, cp->name_ref_at(index)); |
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1946 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); |
0 | 1947 |
1948 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1949 class_format_error( | |
1950 "Invalid method signature in class %s referenced " | |
1951 "from constant pool index %d", _klass->external_name(), index); | |
1952 return; | |
1953 } | |
1954 | |
1955 // Get referenced class type | |
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1956 VerificationType ref_class_type; |
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1957 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 1958 if (!EnableInvokeDynamic || |
1959 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
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1960 class_format_error( |
1602 | 1961 (!EnableInvokeDynamic ? |
1962 "invokedynamic instructions not enabled in this JVM" : | |
1963 "invokedynamic instructions not supported by this class file version"), | |
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1964 _klass->external_name()); |
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1965 return; |
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1966 } |
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1967 } else { |
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1968 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1969 } |
0 | 1970 |
1971 // For a small signature length, we just allocate 128 bytes instead | |
1972 // of parsing the signature once to find its size. | |
1973 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1974 // longs/doubles to be consertive. | |
1975 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1976 "buffer type must match VerificationType size"); | |
1977 uintptr_t on_stack_sig_types_buffer[128]; | |
1978 // If we make a VerificationType[128] array directly, the compiler calls | |
1979 // to the c-runtime library to do the allocation instead of just | |
1980 // stack allocating it. Plus it would run constructors. This shows up | |
1981 // in performance profiles. | |
1982 | |
1983 VerificationType* sig_types; | |
1984 int size = (method_sig->utf8_length() - 3) * 2; | |
1985 if (size > 128) { | |
1986 // Long and double occupies two slots here. | |
1987 ArgumentSizeComputer size_it(method_sig); | |
1988 size = size_it.size(); | |
1989 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1990 } else{ | |
1991 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1992 } | |
1993 SignatureStream sig_stream(method_sig); | |
1994 int sig_i = 0; | |
1995 while (!sig_stream.at_return_type()) { | |
1996 sig_i += change_sig_to_verificationType( | |
1997 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
1998 sig_stream.next(); | |
1999 } | |
2000 int nargs = sig_i; | |
2001 | |
2002 #ifdef ASSERT | |
2003 { | |
2004 ArgumentSizeComputer size_it(method_sig); | |
2005 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
2006 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
2007 } | |
2008 #endif | |
2009 | |
2010 // Check instruction operands | |
2011 u2 bci = bcs->bci(); | |
2012 if (opcode == Bytecodes::_invokeinterface) { | |
2013 address bcp = bcs->bcp(); | |
2014 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
2015 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
2016 // the difference between the size of the operand stack before and after the instruction | |
2017 // executes. | |
2018 if (*(bcp+3) != (nargs+1)) { | |
2019 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
2020 return; | |
2021 } | |
2022 if (*(bcp+4) != 0) { | |
2023 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
2024 return; | |
2025 } | |
2026 } | |
2027 | |
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2028 if (opcode == Bytecodes::_invokedynamic) { |
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2029 address bcp = bcs->bcp(); |
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2030 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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2031 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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2032 return; |
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2033 } |
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2034 } |
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2035 |
0 | 2036 if (method_name->byte_at(0) == '<') { |
2037 // Make sure <init> can only be invoked by invokespecial | |
2038 if (opcode != Bytecodes::_invokespecial || | |
2039 method_name() != vmSymbols::object_initializer_name()) { | |
2040 verify_error(bci, "Illegal call to internal method"); | |
2041 return; | |
2042 } | |
2043 } else if (opcode == Bytecodes::_invokespecial | |
2044 && !ref_class_type.equals(current_type()) | |
2045 && !ref_class_type.equals(VerificationType::reference_type( | |
2046 current_class()->super()->klass_part()->name()))) { | |
2047 bool subtype = ref_class_type.is_assignable_from( | |
2048 current_type(), current_class(), CHECK_VERIFY(this)); | |
2049 if (!subtype) { | |
2050 verify_error(bci, "Bad invokespecial instruction: " | |
2051 "current class isn't assignable to reference class."); | |
2052 return; | |
2053 } | |
2054 } | |
2055 // Match method descriptor with operand stack | |
2056 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2057 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2058 } | |
2059 // Check objectref on operand stack | |
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2060 if (opcode != Bytecodes::_invokestatic && |
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2061 opcode != Bytecodes::_invokedynamic) { |
0 | 2062 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
2063 verify_invoke_init(bcs, ref_class_type, current_frame, | |
2064 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2065 } else { // other methods | |
2066 // Ensures that target class is assignable to method class. | |
2067 if (opcode == Bytecodes::_invokespecial) { | |
2068 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2069 } else if (opcode == Bytecodes::_invokevirtual) { | |
2070 VerificationType stack_object_type = | |
2071 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2072 if (current_type() != stack_object_type) { | |
2073 assert(cp->cache() == NULL, "not rewritten yet"); | |
2074 symbolHandle ref_class_name = symbolHandle(THREAD, | |
2075 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
2076 // See the comments in verify_field_instructions() for | |
2077 // the rationale behind this. | |
2078 if (name_in_supers(ref_class_name(), current_class())) { | |
2079 klassOop ref_class = load_class(ref_class_name, CHECK); | |
2080 if (is_protected_access( | |
2081 _klass, ref_class, method_name(), method_sig(), true)) { | |
2082 // It's protected access, check if stack object is | |
2083 // assignable to current class. | |
2084 bool is_assignable = current_type().is_assignable_from( | |
2085 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
2086 if (!is_assignable) { | |
2087 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2088 && stack_object_type.is_array() | |
2089 && method_name() == vmSymbols::clone_name()) { | |
2090 // Special case: arrays pretend to implement public Object | |
2091 // clone(). | |
2092 } else { | |
2093 verify_error(bci, | |
2094 "Bad access to protected data in invokevirtual"); | |
2095 return; | |
2096 } | |
2097 } | |
2098 } | |
2099 } | |
2100 } | |
2101 } else { | |
2102 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2103 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2104 } | |
2105 } | |
2106 } | |
2107 // Push the result type. | |
2108 if (sig_stream.type() != T_VOID) { | |
2109 if (method_name() == vmSymbols::object_initializer_name()) { | |
2110 // <init> method must have a void return type | |
2111 verify_error(bci, "Return type must be void in <init> method"); | |
2112 return; | |
2113 } | |
2114 VerificationType return_type[2]; | |
2115 int n = change_sig_to_verificationType( | |
2116 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2117 for (int i = 0; i < n; i++) { | |
2118 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2119 } | |
2120 } | |
2121 } | |
2122 | |
2123 VerificationType ClassVerifier::get_newarray_type( | |
2124 u2 index, u2 bci, TRAPS) { | |
2125 const char* from_bt[] = { | |
2126 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2127 }; | |
2128 if (index < T_BOOLEAN || index > T_LONG) { | |
2129 verify_error(bci, "Illegal newarray instruction"); | |
2130 return VerificationType::bogus_type(); | |
2131 } | |
2132 | |
2133 // from_bt[index] contains the array signature which has a length of 2 | |
2134 symbolHandle sig = oopFactory::new_symbol_handle( | |
2135 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
2136 return VerificationType::reference_type(sig); | |
2137 } | |
2138 | |
2139 void ClassVerifier::verify_anewarray( | |
2140 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2141 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2142 current_frame->pop_stack( | |
2143 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2144 | |
2145 VerificationType component_type = | |
2146 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2147 ResourceMark rm(THREAD); | |
2148 int length; | |
2149 char* arr_sig_str; | |
2150 if (component_type.is_array()) { // it's an array | |
2151 const char* component_name = component_type.name()->as_utf8(); | |
2152 // add one dimension to component | |
2153 length = (int)strlen(component_name) + 1; | |
2154 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2155 arr_sig_str[0] = '['; | |
2156 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2157 } else { // it's an object or interface | |
2158 const char* component_name = component_type.name()->as_utf8(); | |
2159 // add one dimension to component with 'L' prepended and ';' postpended. | |
2160 length = (int)strlen(component_name) + 3; | |
2161 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2162 arr_sig_str[0] = '['; | |
2163 arr_sig_str[1] = 'L'; | |
2164 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2165 arr_sig_str[length - 1] = ';'; | |
2166 } | |
2167 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
2168 arr_sig_str, length, CHECK_VERIFY(this)); | |
2169 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2170 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2171 } | |
2172 | |
2173 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2174 current_frame->get_local( | |
2175 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2176 current_frame->push_stack( | |
2177 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2178 } | |
2179 | |
2180 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2181 current_frame->get_local_2( | |
2182 index, VerificationType::long_type(), | |
2183 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2184 current_frame->push_stack_2( | |
2185 VerificationType::long_type(), | |
2186 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2187 } | |
2188 | |
2189 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2190 current_frame->get_local( | |
2191 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2192 current_frame->push_stack( | |
2193 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2194 } | |
2195 | |
2196 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2197 current_frame->get_local_2( | |
2198 index, VerificationType::double_type(), | |
2199 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2200 current_frame->push_stack_2( | |
2201 VerificationType::double_type(), | |
2202 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2203 } | |
2204 | |
2205 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2206 VerificationType type = current_frame->get_local( | |
2207 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2208 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2209 } | |
2210 | |
2211 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2212 current_frame->pop_stack( | |
2213 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2214 current_frame->set_local( | |
2215 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2216 } | |
2217 | |
2218 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2219 current_frame->pop_stack_2( | |
2220 VerificationType::long2_type(), | |
2221 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2222 current_frame->set_local_2( | |
2223 index, VerificationType::long_type(), | |
2224 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2225 } | |
2226 | |
2227 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2228 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2229 current_frame->set_local( | |
2230 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2231 } | |
2232 | |
2233 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2234 current_frame->pop_stack_2( | |
2235 VerificationType::double2_type(), | |
2236 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2237 current_frame->set_local_2( | |
2238 index, VerificationType::double_type(), | |
2239 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2240 } | |
2241 | |
2242 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2243 VerificationType type = current_frame->pop_stack( | |
2244 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2245 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2246 } | |
2247 | |
2248 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2249 VerificationType type = current_frame->get_local( | |
2250 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2251 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2252 } | |
2253 | |
2254 void ClassVerifier::verify_return_value( | |
2255 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2256 if (return_type == VerificationType::bogus_type()) { | |
2257 verify_error(bci, "Method expects a return value"); | |
2258 return; | |
2259 } | |
2260 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
2261 if (!match) { | |
2262 verify_error(bci, "Bad return type"); | |
2263 return; | |
2264 } | |
2265 } |