Mercurial > hg > graal-jvmci-8
annotate src/share/vm/classfile/verifier.cpp @ 2129:8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
Reviewed-by: mchung, acorn
author | kevinw |
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date | Wed, 12 Jan 2011 15:44:16 +0000 |
parents | 828eafbd85cc |
children | 3582bf76420e |
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/interfaceSupport.hpp" | |
42 #include "runtime/javaCalls.hpp" | |
43 #include "runtime/orderAccess.hpp" | |
44 #include "runtime/os.hpp" | |
45 #ifdef TARGET_ARCH_x86 | |
46 # include "bytes_x86.hpp" | |
47 #endif | |
48 #ifdef TARGET_ARCH_sparc | |
49 # include "bytes_sparc.hpp" | |
50 #endif | |
51 #ifdef TARGET_ARCH_zero | |
52 # include "bytes_zero.hpp" | |
53 #endif | |
0 | 54 |
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55 #define NOFAILOVER_MAJOR_VERSION 51 |
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56 |
0 | 57 // Access to external entry for VerifyClassCodes - old byte code verifier |
58 | |
59 extern "C" { | |
60 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
61 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
62 } | |
63 | |
64 static void* volatile _verify_byte_codes_fn = NULL; | |
65 | |
66 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
67 | |
68 static void* verify_byte_codes_fn() { | |
69 if (_verify_byte_codes_fn == NULL) { | |
70 void *lib_handle = os::native_java_library(); | |
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71 void *func = os::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); |
0 | 72 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
73 if (func == NULL) { | |
74 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
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75 func = os::dll_lookup(lib_handle, "VerifyClassCodes"); |
0 | 76 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
77 } | |
78 } | |
79 return (void*)_verify_byte_codes_fn; | |
80 } | |
81 | |
82 | |
83 // Methods in Verifier | |
84 | |
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85 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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86 return (class_loader == NULL || !should_verify_class) ? |
0 | 87 BytecodeVerificationLocal : BytecodeVerificationRemote; |
88 } | |
89 | |
90 bool Verifier::relax_verify_for(oop loader) { | |
91 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
92 bool need_verify = | |
93 // verifyAll | |
94 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
95 // verifyRemote | |
96 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
97 return !need_verify; | |
98 } | |
99 | |
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100 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
0 | 101 ResourceMark rm(THREAD); |
102 HandleMark hm; | |
103 | |
104 symbolHandle exception_name; | |
105 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; | |
106 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
107 | |
108 const char* klassName = klass->external_name(); | |
109 | |
110 // If the class should be verified, first see if we can use the split | |
111 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
112 // is set, then call the inference verifier. | |
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113 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 114 if (TraceClassInitialization) { |
115 tty->print_cr("Start class verification for: %s", klassName); | |
116 } | |
117 if (UseSplitVerifier && | |
118 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
119 ClassVerifier split_verifier( | |
120 klass, message_buffer, message_buffer_len, THREAD); | |
121 split_verifier.verify_class(THREAD); | |
122 exception_name = split_verifier.result(); | |
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123 if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && |
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124 FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && |
0 | 125 (exception_name == vmSymbols::java_lang_VerifyError() || |
126 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
127 if (TraceClassInitialization) { | |
128 tty->print_cr( | |
129 "Fail over class verification to old verifier for: %s", klassName); | |
130 } | |
131 exception_name = inference_verify( | |
132 klass, message_buffer, message_buffer_len, THREAD); | |
133 } | |
134 } else { | |
135 exception_name = inference_verify( | |
136 klass, message_buffer, message_buffer_len, THREAD); | |
137 } | |
138 | |
139 if (TraceClassInitialization) { | |
140 if (HAS_PENDING_EXCEPTION) { | |
141 tty->print("Verification for %s has", klassName); | |
142 tty->print_cr(" exception pending %s ", | |
143 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
144 } else if (!exception_name.is_null()) { | |
145 tty->print_cr("Verification for %s failed", klassName); | |
146 } | |
147 tty->print_cr("End class verification for: %s", klassName); | |
148 } | |
149 } | |
150 | |
151 if (HAS_PENDING_EXCEPTION) { | |
152 return false; // use the existing exception | |
153 } else if (exception_name.is_null()) { | |
154 return true; // verifcation succeeded | |
155 } else { // VerifyError or ClassFormatError to be created and thrown | |
156 ResourceMark rm(THREAD); | |
157 instanceKlassHandle kls = | |
158 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
159 while (!kls.is_null()) { | |
160 if (kls == klass) { | |
161 // If the class being verified is the exception we're creating | |
162 // or one of it's superclasses, we're in trouble and are going | |
163 // to infinitely recurse when we try to initialize the exception. | |
164 // So bail out here by throwing the preallocated VM error. | |
165 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
166 } | |
167 kls = kls->super(); | |
168 } | |
169 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
170 THROW_MSG_(exception_name, message_buffer, false); | |
171 } | |
172 } | |
173 | |
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174 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
0 | 175 symbolOop name = klass->name(); |
1142 | 176 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 177 |
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178 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 179 // return if the class is a bootstrapping class |
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180 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 181 // We need to skip the following four for bootstraping |
182 name != vmSymbols::java_lang_Object() && | |
183 name != vmSymbols::java_lang_Class() && | |
184 name != vmSymbols::java_lang_String() && | |
185 name != vmSymbols::java_lang_Throwable() && | |
186 | |
187 // Can not verify the bytecodes for shared classes because they have | |
188 // already been rewritten to contain constant pool cache indices, | |
189 // which the verifier can't understand. | |
190 // Shared classes shouldn't have stackmaps either. | |
191 !klass()->is_shared() && | |
192 | |
193 // As of the fix for 4486457 we disable verification for all of the | |
194 // dynamically-generated bytecodes associated with the 1.4 | |
195 // reflection implementation, not just those associated with | |
196 // sun/reflect/SerializationConstructorAccessor. | |
197 // NOTE: this is called too early in the bootstrapping process to be | |
198 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
199 (refl_magic_klass == NULL || | |
200 !klass->is_subtype_of(refl_magic_klass) || | |
201 VerifyReflectionBytecodes) | |
202 ); | |
203 } | |
204 | |
205 symbolHandle Verifier::inference_verify( | |
206 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { | |
207 JavaThread* thread = (JavaThread*)THREAD; | |
208 JNIEnv *env = thread->jni_environment(); | |
209 | |
210 void* verify_func = verify_byte_codes_fn(); | |
211 | |
212 if (verify_func == NULL) { | |
213 jio_snprintf(message, message_len, "Could not link verifier"); | |
214 return vmSymbols::java_lang_VerifyError(); | |
215 } | |
216 | |
217 ResourceMark rm(THREAD); | |
218 if (ClassVerifier::_verify_verbose) { | |
219 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
220 } | |
221 | |
222 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
223 jint result; | |
224 | |
225 { | |
226 HandleMark hm(thread); | |
227 ThreadToNativeFromVM ttn(thread); | |
228 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
229 // code knows that we have left the VM | |
230 | |
231 if (_is_new_verify_byte_codes_fn) { | |
232 verify_byte_codes_fn_new_t func = | |
233 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
234 result = (*func)(env, cls, message, (int)message_len, | |
235 klass->major_version()); | |
236 } else { | |
237 verify_byte_codes_fn_t func = | |
238 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
239 result = (*func)(env, cls, message, (int)message_len); | |
240 } | |
241 } | |
242 | |
243 JNIHandles::destroy_local(cls); | |
244 | |
245 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
246 // to be changed (still return jboolean (unsigned char)), and result is | |
247 // 1 when verification is passed. | |
248 symbolHandle nh(NULL); | |
249 if (result == 0) { | |
250 return vmSymbols::java_lang_VerifyError(); | |
251 } else if (result == 1) { | |
252 return nh; // verified. | |
253 } else if (result == 2) { | |
254 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh); | |
255 } else if (result == 3) { | |
256 return vmSymbols::java_lang_ClassFormatError(); | |
257 } else { | |
258 ShouldNotReachHere(); | |
259 return nh; | |
260 } | |
261 } | |
262 | |
263 // Methods in ClassVerifier | |
264 | |
265 bool ClassVerifier::_verify_verbose = false; | |
266 | |
267 ClassVerifier::ClassVerifier( | |
268 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
269 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg), | |
270 _message_buffer_len(msg_len), _klass(klass) { | |
271 _this_type = VerificationType::reference_type(klass->name()); | |
272 } | |
273 | |
274 ClassVerifier::~ClassVerifier() { | |
275 } | |
276 | |
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277 VerificationType ClassVerifier::object_type() const { |
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278 return VerificationType::reference_type(vmSymbols::java_lang_Object()); |
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279 } |
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280 |
0 | 281 void ClassVerifier::verify_class(TRAPS) { |
282 if (_verify_verbose) { | |
283 tty->print_cr("Verifying class %s with new format", | |
284 _klass->external_name()); | |
285 } | |
286 | |
287 objArrayHandle methods(THREAD, _klass->methods()); | |
288 int num_methods = methods->length(); | |
289 | |
290 for (int index = 0; index < num_methods; index++) { | |
1570 | 291 // Check for recursive re-verification before each method. |
292 if (was_recursively_verified()) return; | |
293 | |
0 | 294 methodOop m = (methodOop)methods->obj_at(index); |
295 if (m->is_native() || m->is_abstract()) { | |
296 // If m is native or abstract, skip it. It is checked in class file | |
297 // parser that methods do not override a final method. | |
298 continue; | |
299 } | |
300 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
301 } | |
1570 | 302 |
303 if (_verify_verbose || TraceClassInitialization) { | |
304 if (was_recursively_verified()) | |
305 tty->print_cr("Recursive verification detected for: %s", | |
306 _klass->external_name()); | |
307 } | |
0 | 308 } |
309 | |
310 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
311 ResourceMark rm(THREAD); | |
312 _method = m; // initialize _method | |
313 if (_verify_verbose) { | |
314 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
315 } | |
316 | |
317 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
318 | |
319 int32_t max_stack = m->max_stack(); | |
320 int32_t max_locals = m->max_locals(); | |
321 constantPoolHandle cp(THREAD, m->constants()); | |
322 | |
323 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
324 class_format_error("Invalid method signature"); | |
325 return; | |
326 } | |
327 | |
328 // Initial stack map frame: offset is 0, stack is initially empty. | |
329 StackMapFrame current_frame(max_locals, max_stack, this); | |
330 // Set initial locals | |
331 VerificationType return_type = current_frame.set_locals_from_arg( | |
332 m, current_type(), CHECK_VERIFY(this)); | |
333 | |
334 int32_t stackmap_index = 0; // index to the stackmap array | |
335 | |
336 u4 code_length = m->code_size(); | |
337 | |
338 // Scan the bytecode and map each instruction's start offset to a number. | |
339 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
340 | |
341 int ex_min = code_length; | |
342 int ex_max = -1; | |
343 // Look through each item on the exception table. Each of the fields must refer | |
344 // to a legal instruction. | |
345 verify_exception_handler_table( | |
346 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
347 | |
348 // Look through each entry on the local variable table and make sure | |
349 // its range of code array offsets is valid. (4169817) | |
350 if (m->has_localvariable_table()) { | |
351 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
352 } | |
353 | |
354 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
355 StackMapStream stream(stackmap_data); | |
356 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
357 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
358 code_data, code_length, CHECK_VERIFY(this)); | |
359 | |
360 if (_verify_verbose) { | |
361 stackmap_table.print(); | |
362 } | |
363 | |
364 RawBytecodeStream bcs(m); | |
365 | |
366 // Scan the byte code linearly from the start to the end | |
367 bool no_control_flow = false; // Set to true when there is no direct control | |
368 // flow from current instruction to the next | |
369 // instruction in sequence | |
370 Bytecodes::Code opcode; | |
371 while (!bcs.is_last_bytecode()) { | |
1570 | 372 // Check for recursive re-verification before each bytecode. |
373 if (was_recursively_verified()) return; | |
374 | |
0 | 375 opcode = bcs.raw_next(); |
376 u2 bci = bcs.bci(); | |
377 | |
378 // Set current frame's offset to bci | |
379 current_frame.set_offset(bci); | |
380 | |
381 // Make sure every offset in stackmap table point to the beginning to | |
382 // an instruction. Match current_frame to stackmap_table entry with | |
383 // the same offset if exists. | |
384 stackmap_index = verify_stackmap_table( | |
385 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
386 no_control_flow, CHECK_VERIFY(this)); | |
387 | |
388 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
389 | |
390 // Merge with the next instruction | |
391 { | |
392 u2 index; | |
393 int target; | |
394 VerificationType type, type2; | |
395 VerificationType atype; | |
396 | |
397 #ifndef PRODUCT | |
398 if (_verify_verbose) { | |
399 current_frame.print(); | |
400 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
401 } | |
402 #endif | |
403 | |
404 // Make sure wide instruction is in correct format | |
405 if (bcs.is_wide()) { | |
406 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
407 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
408 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
409 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
410 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
411 opcode != Bytecodes::_dstore) { | |
412 verify_error(bci, "Bad wide instruction"); | |
413 return; | |
414 } | |
415 } | |
416 | |
417 switch (opcode) { | |
418 case Bytecodes::_nop : | |
419 no_control_flow = false; break; | |
420 case Bytecodes::_aconst_null : | |
421 current_frame.push_stack( | |
422 VerificationType::null_type(), CHECK_VERIFY(this)); | |
423 no_control_flow = false; break; | |
424 case Bytecodes::_iconst_m1 : | |
425 case Bytecodes::_iconst_0 : | |
426 case Bytecodes::_iconst_1 : | |
427 case Bytecodes::_iconst_2 : | |
428 case Bytecodes::_iconst_3 : | |
429 case Bytecodes::_iconst_4 : | |
430 case Bytecodes::_iconst_5 : | |
431 current_frame.push_stack( | |
432 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
433 no_control_flow = false; break; | |
434 case Bytecodes::_lconst_0 : | |
435 case Bytecodes::_lconst_1 : | |
436 current_frame.push_stack_2( | |
437 VerificationType::long_type(), | |
438 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
439 no_control_flow = false; break; | |
440 case Bytecodes::_fconst_0 : | |
441 case Bytecodes::_fconst_1 : | |
442 case Bytecodes::_fconst_2 : | |
443 current_frame.push_stack( | |
444 VerificationType::float_type(), CHECK_VERIFY(this)); | |
445 no_control_flow = false; break; | |
446 case Bytecodes::_dconst_0 : | |
447 case Bytecodes::_dconst_1 : | |
448 current_frame.push_stack_2( | |
449 VerificationType::double_type(), | |
450 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
451 no_control_flow = false; break; | |
452 case Bytecodes::_sipush : | |
453 case Bytecodes::_bipush : | |
454 current_frame.push_stack( | |
455 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
456 no_control_flow = false; break; | |
457 case Bytecodes::_ldc : | |
458 verify_ldc( | |
1565 | 459 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 460 cp, bci, CHECK_VERIFY(this)); |
461 no_control_flow = false; break; | |
462 case Bytecodes::_ldc_w : | |
463 case Bytecodes::_ldc2_w : | |
464 verify_ldc( | |
1565 | 465 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 466 cp, bci, CHECK_VERIFY(this)); |
467 no_control_flow = false; break; | |
468 case Bytecodes::_iload : | |
469 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
470 no_control_flow = false; break; | |
471 case Bytecodes::_iload_0 : | |
472 case Bytecodes::_iload_1 : | |
473 case Bytecodes::_iload_2 : | |
474 case Bytecodes::_iload_3 : | |
475 index = opcode - Bytecodes::_iload_0; | |
476 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
477 no_control_flow = false; break; | |
478 case Bytecodes::_lload : | |
479 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
480 no_control_flow = false; break; | |
481 case Bytecodes::_lload_0 : | |
482 case Bytecodes::_lload_1 : | |
483 case Bytecodes::_lload_2 : | |
484 case Bytecodes::_lload_3 : | |
485 index = opcode - Bytecodes::_lload_0; | |
486 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
487 no_control_flow = false; break; | |
488 case Bytecodes::_fload : | |
489 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
490 no_control_flow = false; break; | |
491 case Bytecodes::_fload_0 : | |
492 case Bytecodes::_fload_1 : | |
493 case Bytecodes::_fload_2 : | |
494 case Bytecodes::_fload_3 : | |
495 index = opcode - Bytecodes::_fload_0; | |
496 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
497 no_control_flow = false; break; | |
498 case Bytecodes::_dload : | |
499 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
500 no_control_flow = false; break; | |
501 case Bytecodes::_dload_0 : | |
502 case Bytecodes::_dload_1 : | |
503 case Bytecodes::_dload_2 : | |
504 case Bytecodes::_dload_3 : | |
505 index = opcode - Bytecodes::_dload_0; | |
506 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
507 no_control_flow = false; break; | |
508 case Bytecodes::_aload : | |
509 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
510 no_control_flow = false; break; | |
511 case Bytecodes::_aload_0 : | |
512 case Bytecodes::_aload_1 : | |
513 case Bytecodes::_aload_2 : | |
514 case Bytecodes::_aload_3 : | |
515 index = opcode - Bytecodes::_aload_0; | |
516 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
517 no_control_flow = false; break; | |
518 case Bytecodes::_iaload : | |
519 type = current_frame.pop_stack( | |
520 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
521 atype = current_frame.pop_stack( | |
522 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
523 if (!atype.is_int_array()) { | |
524 verify_error(bci, bad_type_msg, "iaload"); | |
525 return; | |
526 } | |
527 current_frame.push_stack( | |
528 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
529 no_control_flow = false; break; | |
530 case Bytecodes::_baload : | |
531 type = current_frame.pop_stack( | |
532 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
533 atype = current_frame.pop_stack( | |
534 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
535 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
536 verify_error(bci, bad_type_msg, "baload"); | |
537 return; | |
538 } | |
539 current_frame.push_stack( | |
540 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
541 no_control_flow = false; break; | |
542 case Bytecodes::_caload : | |
543 type = current_frame.pop_stack( | |
544 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
545 atype = current_frame.pop_stack( | |
546 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
547 if (!atype.is_char_array()) { | |
548 verify_error(bci, bad_type_msg, "caload"); | |
549 return; | |
550 } | |
551 current_frame.push_stack( | |
552 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
553 no_control_flow = false; break; | |
554 case Bytecodes::_saload : | |
555 type = current_frame.pop_stack( | |
556 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
557 atype = current_frame.pop_stack( | |
558 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
559 if (!atype.is_short_array()) { | |
560 verify_error(bci, bad_type_msg, "saload"); | |
561 return; | |
562 } | |
563 current_frame.push_stack( | |
564 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
565 no_control_flow = false; break; | |
566 case Bytecodes::_laload : | |
567 type = current_frame.pop_stack( | |
568 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
569 atype = current_frame.pop_stack( | |
570 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
571 if (!atype.is_long_array()) { | |
572 verify_error(bci, bad_type_msg, "laload"); | |
573 return; | |
574 } | |
575 current_frame.push_stack_2( | |
576 VerificationType::long_type(), | |
577 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
578 no_control_flow = false; break; | |
579 case Bytecodes::_faload : | |
580 type = current_frame.pop_stack( | |
581 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
582 atype = current_frame.pop_stack( | |
583 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
584 if (!atype.is_float_array()) { | |
585 verify_error(bci, bad_type_msg, "faload"); | |
586 return; | |
587 } | |
588 current_frame.push_stack( | |
589 VerificationType::float_type(), CHECK_VERIFY(this)); | |
590 no_control_flow = false; break; | |
591 case Bytecodes::_daload : | |
592 type = current_frame.pop_stack( | |
593 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
594 atype = current_frame.pop_stack( | |
595 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
596 if (!atype.is_double_array()) { | |
597 verify_error(bci, bad_type_msg, "daload"); | |
598 return; | |
599 } | |
600 current_frame.push_stack_2( | |
601 VerificationType::double_type(), | |
602 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
603 no_control_flow = false; break; | |
604 case Bytecodes::_aaload : { | |
605 type = current_frame.pop_stack( | |
606 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
607 atype = current_frame.pop_stack( | |
608 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
609 if (!atype.is_reference_array()) { | |
610 verify_error(bci, bad_type_msg, "aaload"); | |
611 return; | |
612 } | |
613 if (atype.is_null()) { | |
614 current_frame.push_stack( | |
615 VerificationType::null_type(), CHECK_VERIFY(this)); | |
616 } else { | |
617 VerificationType component = | |
618 atype.get_component(CHECK_VERIFY(this)); | |
619 current_frame.push_stack(component, CHECK_VERIFY(this)); | |
620 } | |
621 no_control_flow = false; break; | |
622 } | |
623 case Bytecodes::_istore : | |
624 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
625 no_control_flow = false; break; | |
626 case Bytecodes::_istore_0 : | |
627 case Bytecodes::_istore_1 : | |
628 case Bytecodes::_istore_2 : | |
629 case Bytecodes::_istore_3 : | |
630 index = opcode - Bytecodes::_istore_0; | |
631 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
632 no_control_flow = false; break; | |
633 case Bytecodes::_lstore : | |
634 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
635 no_control_flow = false; break; | |
636 case Bytecodes::_lstore_0 : | |
637 case Bytecodes::_lstore_1 : | |
638 case Bytecodes::_lstore_2 : | |
639 case Bytecodes::_lstore_3 : | |
640 index = opcode - Bytecodes::_lstore_0; | |
641 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
642 no_control_flow = false; break; | |
643 case Bytecodes::_fstore : | |
644 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
645 no_control_flow = false; break; | |
646 case Bytecodes::_fstore_0 : | |
647 case Bytecodes::_fstore_1 : | |
648 case Bytecodes::_fstore_2 : | |
649 case Bytecodes::_fstore_3 : | |
650 index = opcode - Bytecodes::_fstore_0; | |
651 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
652 no_control_flow = false; break; | |
653 case Bytecodes::_dstore : | |
654 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
655 no_control_flow = false; break; | |
656 case Bytecodes::_dstore_0 : | |
657 case Bytecodes::_dstore_1 : | |
658 case Bytecodes::_dstore_2 : | |
659 case Bytecodes::_dstore_3 : | |
660 index = opcode - Bytecodes::_dstore_0; | |
661 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
662 no_control_flow = false; break; | |
663 case Bytecodes::_astore : | |
664 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
665 no_control_flow = false; break; | |
666 case Bytecodes::_astore_0 : | |
667 case Bytecodes::_astore_1 : | |
668 case Bytecodes::_astore_2 : | |
669 case Bytecodes::_astore_3 : | |
670 index = opcode - Bytecodes::_astore_0; | |
671 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
672 no_control_flow = false; break; | |
673 case Bytecodes::_iastore : | |
674 type = current_frame.pop_stack( | |
675 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
676 type2 = current_frame.pop_stack( | |
677 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
678 atype = current_frame.pop_stack( | |
679 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
680 if (!atype.is_int_array()) { | |
681 verify_error(bci, bad_type_msg, "iastore"); | |
682 return; | |
683 } | |
684 no_control_flow = false; break; | |
685 case Bytecodes::_bastore : | |
686 type = current_frame.pop_stack( | |
687 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
688 type2 = current_frame.pop_stack( | |
689 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
690 atype = current_frame.pop_stack( | |
691 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
692 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
693 verify_error(bci, bad_type_msg, "bastore"); | |
694 return; | |
695 } | |
696 no_control_flow = false; break; | |
697 case Bytecodes::_castore : | |
698 current_frame.pop_stack( | |
699 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
700 current_frame.pop_stack( | |
701 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
702 atype = current_frame.pop_stack( | |
703 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
704 if (!atype.is_char_array()) { | |
705 verify_error(bci, bad_type_msg, "castore"); | |
706 return; | |
707 } | |
708 no_control_flow = false; break; | |
709 case Bytecodes::_sastore : | |
710 current_frame.pop_stack( | |
711 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
712 current_frame.pop_stack( | |
713 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
714 atype = current_frame.pop_stack( | |
715 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
716 if (!atype.is_short_array()) { | |
717 verify_error(bci, bad_type_msg, "sastore"); | |
718 return; | |
719 } | |
720 no_control_flow = false; break; | |
721 case Bytecodes::_lastore : | |
722 current_frame.pop_stack_2( | |
723 VerificationType::long2_type(), | |
724 VerificationType::long_type(), CHECK_VERIFY(this)); | |
725 current_frame.pop_stack( | |
726 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
727 atype = current_frame.pop_stack( | |
728 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
729 if (!atype.is_long_array()) { | |
730 verify_error(bci, bad_type_msg, "lastore"); | |
731 return; | |
732 } | |
733 no_control_flow = false; break; | |
734 case Bytecodes::_fastore : | |
735 current_frame.pop_stack( | |
736 VerificationType::float_type(), CHECK_VERIFY(this)); | |
737 current_frame.pop_stack | |
738 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
739 atype = current_frame.pop_stack( | |
740 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
741 if (!atype.is_float_array()) { | |
742 verify_error(bci, bad_type_msg, "fastore"); | |
743 return; | |
744 } | |
745 no_control_flow = false; break; | |
746 case Bytecodes::_dastore : | |
747 current_frame.pop_stack_2( | |
748 VerificationType::double2_type(), | |
749 VerificationType::double_type(), CHECK_VERIFY(this)); | |
750 current_frame.pop_stack( | |
751 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
752 atype = current_frame.pop_stack( | |
753 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
754 if (!atype.is_double_array()) { | |
755 verify_error(bci, bad_type_msg, "dastore"); | |
756 return; | |
757 } | |
758 no_control_flow = false; break; | |
759 case Bytecodes::_aastore : | |
1955
1070423b51f3
6865028: Illegal instructions passing verification prior to 'invokespecial Object.<init>'
kamg
parents:
1678
diff
changeset
|
760 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 761 type2 = current_frame.pop_stack( |
762 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
763 atype = current_frame.pop_stack( | |
764 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
765 // more type-checking is done at runtime | |
766 if (!atype.is_reference_array()) { | |
767 verify_error(bci, bad_type_msg, "aastore"); | |
768 return; | |
769 } | |
770 // 4938384: relaxed constraint in JVMS 3nd edition. | |
771 no_control_flow = false; break; | |
772 case Bytecodes::_pop : | |
773 current_frame.pop_stack( | |
774 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
775 no_control_flow = false; break; | |
776 case Bytecodes::_pop2 : | |
777 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
778 if (type.is_category1()) { | |
779 current_frame.pop_stack( | |
780 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
781 } else if (type.is_category2_2nd()) { | |
782 current_frame.pop_stack( | |
783 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
784 } else { | |
785 verify_error(bci, bad_type_msg, "pop2"); | |
786 return; | |
787 } | |
788 no_control_flow = false; break; | |
789 case Bytecodes::_dup : | |
790 type = current_frame.pop_stack( | |
791 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
792 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
793 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
794 no_control_flow = false; break; | |
795 case Bytecodes::_dup_x1 : | |
796 type = current_frame.pop_stack( | |
797 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
798 type2 = current_frame.pop_stack( | |
799 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
800 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
801 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
802 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
803 no_control_flow = false; break; | |
804 case Bytecodes::_dup_x2 : | |
805 { | |
806 VerificationType type3; | |
807 type = current_frame.pop_stack( | |
808 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
809 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
810 if (type2.is_category1()) { | |
811 type3 = current_frame.pop_stack( | |
812 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
813 } else if (type2.is_category2_2nd()) { | |
814 type3 = current_frame.pop_stack( | |
815 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
816 } else { | |
817 verify_error(bci, bad_type_msg, "dup_x2"); | |
818 return; | |
819 } | |
820 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
821 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
822 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
823 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
824 no_control_flow = false; break; | |
825 } | |
826 case Bytecodes::_dup2 : | |
827 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
828 if (type.is_category1()) { | |
829 type2 = current_frame.pop_stack( | |
830 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
831 } else if (type.is_category2_2nd()) { | |
832 type2 = current_frame.pop_stack( | |
833 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
834 } else { | |
835 verify_error(bci, bad_type_msg, "dup2"); | |
836 return; | |
837 } | |
838 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
839 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
840 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
841 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
842 no_control_flow = false; break; | |
843 case Bytecodes::_dup2_x1 : | |
844 { | |
845 VerificationType type3; | |
846 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
847 if (type.is_category1()) { | |
848 type2 = current_frame.pop_stack( | |
849 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
850 } else if(type.is_category2_2nd()) { | |
851 type2 = current_frame.pop_stack | |
852 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
853 } else { | |
854 verify_error(bci, bad_type_msg, "dup2_x1"); | |
855 return; | |
856 } | |
857 type3 = current_frame.pop_stack( | |
858 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
859 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
860 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
861 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
862 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
863 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
864 no_control_flow = false; break; | |
865 } | |
866 case Bytecodes::_dup2_x2 : | |
867 { | |
868 VerificationType type3, type4; | |
869 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
870 if (type.is_category1()) { | |
871 type2 = current_frame.pop_stack( | |
872 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
873 } else if (type.is_category2_2nd()) { | |
874 type2 = current_frame.pop_stack( | |
875 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
876 } else { | |
877 verify_error(bci, bad_type_msg, "dup2_x2"); | |
878 return; | |
879 } | |
880 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
881 if (type3.is_category1()) { | |
882 type4 = current_frame.pop_stack( | |
883 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
884 } else if (type3.is_category2_2nd()) { | |
885 type4 = current_frame.pop_stack( | |
886 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
887 } else { | |
888 verify_error(bci, bad_type_msg, "dup2_x2"); | |
889 return; | |
890 } | |
891 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
892 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
893 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
894 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
895 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
896 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
897 no_control_flow = false; break; | |
898 } | |
899 case Bytecodes::_swap : | |
900 type = current_frame.pop_stack( | |
901 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
902 type2 = current_frame.pop_stack( | |
903 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
904 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
905 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
906 no_control_flow = false; break; | |
907 case Bytecodes::_iadd : | |
908 case Bytecodes::_isub : | |
909 case Bytecodes::_imul : | |
910 case Bytecodes::_idiv : | |
911 case Bytecodes::_irem : | |
912 case Bytecodes::_ishl : | |
913 case Bytecodes::_ishr : | |
914 case Bytecodes::_iushr : | |
915 case Bytecodes::_ior : | |
916 case Bytecodes::_ixor : | |
917 case Bytecodes::_iand : | |
918 current_frame.pop_stack( | |
919 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
920 // fall through | |
921 case Bytecodes::_ineg : | |
922 current_frame.pop_stack( | |
923 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
924 current_frame.push_stack( | |
925 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
926 no_control_flow = false; break; | |
927 case Bytecodes::_ladd : | |
928 case Bytecodes::_lsub : | |
929 case Bytecodes::_lmul : | |
930 case Bytecodes::_ldiv : | |
931 case Bytecodes::_lrem : | |
932 case Bytecodes::_land : | |
933 case Bytecodes::_lor : | |
934 case Bytecodes::_lxor : | |
935 current_frame.pop_stack_2( | |
936 VerificationType::long2_type(), | |
937 VerificationType::long_type(), CHECK_VERIFY(this)); | |
938 // fall through | |
939 case Bytecodes::_lneg : | |
940 current_frame.pop_stack_2( | |
941 VerificationType::long2_type(), | |
942 VerificationType::long_type(), CHECK_VERIFY(this)); | |
943 current_frame.push_stack_2( | |
944 VerificationType::long_type(), | |
945 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
946 no_control_flow = false; break; | |
947 case Bytecodes::_lshl : | |
948 case Bytecodes::_lshr : | |
949 case Bytecodes::_lushr : | |
950 current_frame.pop_stack( | |
951 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
952 current_frame.pop_stack_2( | |
953 VerificationType::long2_type(), | |
954 VerificationType::long_type(), CHECK_VERIFY(this)); | |
955 current_frame.push_stack_2( | |
956 VerificationType::long_type(), | |
957 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
958 no_control_flow = false; break; | |
959 case Bytecodes::_fadd : | |
960 case Bytecodes::_fsub : | |
961 case Bytecodes::_fmul : | |
962 case Bytecodes::_fdiv : | |
963 case Bytecodes::_frem : | |
964 current_frame.pop_stack( | |
965 VerificationType::float_type(), CHECK_VERIFY(this)); | |
966 // fall through | |
967 case Bytecodes::_fneg : | |
968 current_frame.pop_stack( | |
969 VerificationType::float_type(), CHECK_VERIFY(this)); | |
970 current_frame.push_stack( | |
971 VerificationType::float_type(), CHECK_VERIFY(this)); | |
972 no_control_flow = false; break; | |
973 case Bytecodes::_dadd : | |
974 case Bytecodes::_dsub : | |
975 case Bytecodes::_dmul : | |
976 case Bytecodes::_ddiv : | |
977 case Bytecodes::_drem : | |
978 current_frame.pop_stack_2( | |
979 VerificationType::double2_type(), | |
980 VerificationType::double_type(), CHECK_VERIFY(this)); | |
981 // fall through | |
982 case Bytecodes::_dneg : | |
983 current_frame.pop_stack_2( | |
984 VerificationType::double2_type(), | |
985 VerificationType::double_type(), CHECK_VERIFY(this)); | |
986 current_frame.push_stack_2( | |
987 VerificationType::double_type(), | |
988 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
989 no_control_flow = false; break; | |
990 case Bytecodes::_iinc : | |
991 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
992 no_control_flow = false; break; | |
993 case Bytecodes::_i2l : | |
994 type = current_frame.pop_stack( | |
995 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
996 current_frame.push_stack_2( | |
997 VerificationType::long_type(), | |
998 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
999 no_control_flow = false; break; | |
1000 case Bytecodes::_l2i : | |
1001 current_frame.pop_stack_2( | |
1002 VerificationType::long2_type(), | |
1003 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1004 current_frame.push_stack( | |
1005 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1006 no_control_flow = false; break; | |
1007 case Bytecodes::_i2f : | |
1008 current_frame.pop_stack( | |
1009 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1010 current_frame.push_stack( | |
1011 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1012 no_control_flow = false; break; | |
1013 case Bytecodes::_i2d : | |
1014 current_frame.pop_stack( | |
1015 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1016 current_frame.push_stack_2( | |
1017 VerificationType::double_type(), | |
1018 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1019 no_control_flow = false; break; | |
1020 case Bytecodes::_l2f : | |
1021 current_frame.pop_stack_2( | |
1022 VerificationType::long2_type(), | |
1023 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1024 current_frame.push_stack( | |
1025 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1026 no_control_flow = false; break; | |
1027 case Bytecodes::_l2d : | |
1028 current_frame.pop_stack_2( | |
1029 VerificationType::long2_type(), | |
1030 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1031 current_frame.push_stack_2( | |
1032 VerificationType::double_type(), | |
1033 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1034 no_control_flow = false; break; | |
1035 case Bytecodes::_f2i : | |
1036 current_frame.pop_stack( | |
1037 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1038 current_frame.push_stack( | |
1039 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1040 no_control_flow = false; break; | |
1041 case Bytecodes::_f2l : | |
1042 current_frame.pop_stack( | |
1043 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1044 current_frame.push_stack_2( | |
1045 VerificationType::long_type(), | |
1046 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1047 no_control_flow = false; break; | |
1048 case Bytecodes::_f2d : | |
1049 current_frame.pop_stack( | |
1050 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1051 current_frame.push_stack_2( | |
1052 VerificationType::double_type(), | |
1053 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1054 no_control_flow = false; break; | |
1055 case Bytecodes::_d2i : | |
1056 current_frame.pop_stack_2( | |
1057 VerificationType::double2_type(), | |
1058 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1059 current_frame.push_stack( | |
1060 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1061 no_control_flow = false; break; | |
1062 case Bytecodes::_d2l : | |
1063 current_frame.pop_stack_2( | |
1064 VerificationType::double2_type(), | |
1065 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1066 current_frame.push_stack_2( | |
1067 VerificationType::long_type(), | |
1068 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1069 no_control_flow = false; break; | |
1070 case Bytecodes::_d2f : | |
1071 current_frame.pop_stack_2( | |
1072 VerificationType::double2_type(), | |
1073 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1074 current_frame.push_stack( | |
1075 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1076 no_control_flow = false; break; | |
1077 case Bytecodes::_i2b : | |
1078 case Bytecodes::_i2c : | |
1079 case Bytecodes::_i2s : | |
1080 current_frame.pop_stack( | |
1081 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1082 current_frame.push_stack( | |
1083 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1084 no_control_flow = false; break; | |
1085 case Bytecodes::_lcmp : | |
1086 current_frame.pop_stack_2( | |
1087 VerificationType::long2_type(), | |
1088 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1089 current_frame.pop_stack_2( | |
1090 VerificationType::long2_type(), | |
1091 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1092 current_frame.push_stack( | |
1093 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1094 no_control_flow = false; break; | |
1095 case Bytecodes::_fcmpl : | |
1096 case Bytecodes::_fcmpg : | |
1097 current_frame.pop_stack( | |
1098 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1099 current_frame.pop_stack( | |
1100 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1101 current_frame.push_stack( | |
1102 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1103 no_control_flow = false; break; | |
1104 case Bytecodes::_dcmpl : | |
1105 case Bytecodes::_dcmpg : | |
1106 current_frame.pop_stack_2( | |
1107 VerificationType::double2_type(), | |
1108 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1109 current_frame.pop_stack_2( | |
1110 VerificationType::double2_type(), | |
1111 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1112 current_frame.push_stack( | |
1113 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1114 no_control_flow = false; break; | |
1115 case Bytecodes::_if_icmpeq: | |
1116 case Bytecodes::_if_icmpne: | |
1117 case Bytecodes::_if_icmplt: | |
1118 case Bytecodes::_if_icmpge: | |
1119 case Bytecodes::_if_icmpgt: | |
1120 case Bytecodes::_if_icmple: | |
1121 current_frame.pop_stack( | |
1122 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1123 // fall through | |
1124 case Bytecodes::_ifeq: | |
1125 case Bytecodes::_ifne: | |
1126 case Bytecodes::_iflt: | |
1127 case Bytecodes::_ifge: | |
1128 case Bytecodes::_ifgt: | |
1129 case Bytecodes::_ifle: | |
1130 current_frame.pop_stack( | |
1131 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1132 target = bcs.dest(); | |
1133 stackmap_table.check_jump_target( | |
1134 ¤t_frame, target, CHECK_VERIFY(this)); | |
1135 no_control_flow = false; break; | |
1136 case Bytecodes::_if_acmpeq : | |
1137 case Bytecodes::_if_acmpne : | |
1138 current_frame.pop_stack( | |
1139 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1140 // fall through | |
1141 case Bytecodes::_ifnull : | |
1142 case Bytecodes::_ifnonnull : | |
1143 current_frame.pop_stack( | |
1144 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1145 target = bcs.dest(); | |
1146 stackmap_table.check_jump_target | |
1147 (¤t_frame, target, CHECK_VERIFY(this)); | |
1148 no_control_flow = false; break; | |
1149 case Bytecodes::_goto : | |
1150 target = bcs.dest(); | |
1151 stackmap_table.check_jump_target( | |
1152 ¤t_frame, target, CHECK_VERIFY(this)); | |
1153 no_control_flow = true; break; | |
1154 case Bytecodes::_goto_w : | |
1155 target = bcs.dest_w(); | |
1156 stackmap_table.check_jump_target( | |
1157 ¤t_frame, target, CHECK_VERIFY(this)); | |
1158 no_control_flow = true; break; | |
1159 case Bytecodes::_tableswitch : | |
1160 case Bytecodes::_lookupswitch : | |
1161 verify_switch( | |
1162 &bcs, code_length, code_data, ¤t_frame, | |
1163 &stackmap_table, CHECK_VERIFY(this)); | |
1164 no_control_flow = true; break; | |
1165 case Bytecodes::_ireturn : | |
1166 type = current_frame.pop_stack( | |
1167 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1168 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1169 no_control_flow = true; break; | |
1170 case Bytecodes::_lreturn : | |
1171 type2 = current_frame.pop_stack( | |
1172 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1173 type = current_frame.pop_stack( | |
1174 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1175 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1176 no_control_flow = true; break; | |
1177 case Bytecodes::_freturn : | |
1178 type = current_frame.pop_stack( | |
1179 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1180 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1181 no_control_flow = true; break; | |
1182 case Bytecodes::_dreturn : | |
1183 type2 = current_frame.pop_stack( | |
1184 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1185 type = current_frame.pop_stack( | |
1186 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1187 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1188 no_control_flow = true; break; | |
1189 case Bytecodes::_areturn : | |
1190 type = current_frame.pop_stack( | |
1191 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1192 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1193 no_control_flow = true; break; | |
1194 case Bytecodes::_return : | |
1195 if (return_type != VerificationType::bogus_type()) { | |
1196 verify_error(bci, "Method expects no return value"); | |
1197 return; | |
1198 } | |
1199 // Make sure "this" has been initialized if current method is an | |
1200 // <init> | |
1201 if (_method->name() == vmSymbols::object_initializer_name() && | |
1202 current_frame.flag_this_uninit()) { | |
1203 verify_error(bci, | |
1204 "Constructor must call super() or this() before return"); | |
1205 return; | |
1206 } | |
1207 no_control_flow = true; break; | |
1208 case Bytecodes::_getstatic : | |
1209 case Bytecodes::_putstatic : | |
1210 case Bytecodes::_getfield : | |
1211 case Bytecodes::_putfield : | |
1212 verify_field_instructions( | |
1213 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1214 no_control_flow = false; break; | |
1215 case Bytecodes::_invokevirtual : | |
1216 case Bytecodes::_invokespecial : | |
1217 case Bytecodes::_invokestatic : | |
1218 verify_invoke_instructions( | |
1219 &bcs, code_length, ¤t_frame, | |
1220 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1221 no_control_flow = false; break; | |
1222 case Bytecodes::_invokeinterface : | |
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1223 case Bytecodes::_invokedynamic : |
0 | 1224 verify_invoke_instructions( |
1225 &bcs, code_length, ¤t_frame, | |
1226 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1227 no_control_flow = false; break; | |
1228 case Bytecodes::_new : | |
1229 { | |
1565 | 1230 index = bcs.get_index_u2(); |
0 | 1231 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1232 VerificationType new_class_type = | |
1233 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1234 if (!new_class_type.is_object()) { | |
1235 verify_error(bci, "Illegal new instruction"); | |
1236 return; | |
1237 } | |
1238 type = VerificationType::uninitialized_type(bci); | |
1239 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1240 no_control_flow = false; break; | |
1241 } | |
1242 case Bytecodes::_newarray : | |
1243 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1244 current_frame.pop_stack( | |
1245 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1246 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1247 no_control_flow = false; break; | |
1248 case Bytecodes::_anewarray : | |
1249 verify_anewarray( | |
1565 | 1250 bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1251 no_control_flow = false; break; |
1252 case Bytecodes::_arraylength : | |
1253 type = current_frame.pop_stack( | |
1254 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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1255 if (!(type.is_null() || type.is_array())) { |
0 | 1256 verify_error(bci, bad_type_msg, "arraylength"); |
1257 } | |
1258 current_frame.push_stack( | |
1259 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1260 no_control_flow = false; break; | |
1261 case Bytecodes::_checkcast : | |
1262 { | |
1565 | 1263 index = bcs.get_index_u2(); |
0 | 1264 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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1265 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1266 VerificationType klass_type = cp_index_to_type( |
1267 index, cp, CHECK_VERIFY(this)); | |
1268 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1269 no_control_flow = false; break; | |
1270 } | |
1271 case Bytecodes::_instanceof : { | |
1565 | 1272 index = bcs.get_index_u2(); |
0 | 1273 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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1274 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1275 current_frame.push_stack( |
1276 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1277 no_control_flow = false; break; | |
1278 } | |
1279 case Bytecodes::_monitorenter : | |
1280 case Bytecodes::_monitorexit : | |
1281 current_frame.pop_stack( | |
1282 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1283 no_control_flow = false; break; | |
1284 case Bytecodes::_multianewarray : | |
1285 { | |
1565 | 1286 index = bcs.get_index_u2(); |
0 | 1287 u2 dim = *(bcs.bcp()+3); |
1288 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1289 VerificationType new_array_type = | |
1290 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1291 if (!new_array_type.is_array()) { | |
1292 verify_error(bci, | |
1293 "Illegal constant pool index in multianewarray instruction"); | |
1294 return; | |
1295 } | |
1296 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1297 verify_error(bci, | |
1298 "Illegal dimension in multianewarray instruction"); | |
1299 return; | |
1300 } | |
1301 for (int i = 0; i < dim; i++) { | |
1302 current_frame.pop_stack( | |
1303 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1304 } | |
1305 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1306 no_control_flow = false; break; | |
1307 } | |
1308 case Bytecodes::_athrow : | |
1309 type = VerificationType::reference_type( | |
1310 vmSymbols::java_lang_Throwable()); | |
1311 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1312 no_control_flow = true; break; | |
1313 default: | |
1314 // We only need to check the valid bytecodes in class file. | |
1315 // And jsr and ret are not in the new class file format in JDK1.5. | |
1316 verify_error(bci, "Bad instruction"); | |
1317 no_control_flow = false; | |
1318 return; | |
1319 } // end switch | |
1320 } // end Merge with the next instruction | |
1321 | |
1322 // Look for possible jump target in exception handlers and see if it | |
1323 // matches current_frame | |
1324 if (bci >= ex_min && bci < ex_max) { | |
1325 verify_exception_handler_targets( | |
1326 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1327 } | |
1328 } // end while | |
1329 | |
1330 // Make sure that control flow does not fall through end of the method | |
1331 if (!no_control_flow) { | |
1332 verify_error(code_length, "Control flow falls through code end"); | |
1333 return; | |
1334 } | |
1335 } | |
1336 | |
1337 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1338 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1339 memset(code_data, 0, sizeof(char) * code_length); | |
1340 RawBytecodeStream bcs(m); | |
1341 | |
1342 while (!bcs.is_last_bytecode()) { | |
1343 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1344 int bci = bcs.bci(); | |
1565 | 1345 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1346 code_data[bci] = NEW_OFFSET; |
1347 } else { | |
1348 code_data[bci] = BYTECODE_OFFSET; | |
1349 } | |
1350 } else { | |
1351 verify_error(bcs.bci(), "Bad instruction"); | |
1352 return NULL; | |
1353 } | |
1354 } | |
1355 | |
1356 return code_data; | |
1357 } | |
1358 | |
1359 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1360 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1361 constantPoolHandle cp (THREAD, _method->constants()); | |
1362 | |
1363 if (exhandlers() != NULL) { | |
1364 for(int i = 0; i < exhandlers->length();) { | |
1365 u2 start_pc = exhandlers->int_at(i++); | |
1366 u2 end_pc = exhandlers->int_at(i++); | |
1367 u2 handler_pc = exhandlers->int_at(i++); | |
1368 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1369 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1370 return; | |
1371 } | |
1372 if (end_pc != code_length) { // special case: end_pc == code_length | |
1373 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1374 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1375 return; | |
1376 } | |
1377 } | |
1378 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1379 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1380 return; | |
1381 } | |
1382 int catch_type_index = exhandlers->int_at(i++); | |
1383 if (catch_type_index != 0) { | |
1384 VerificationType catch_type = cp_index_to_type( | |
1385 catch_type_index, cp, CHECK_VERIFY(this)); | |
1386 VerificationType throwable = | |
1387 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1388 bool is_subclass = throwable.is_assignable_from( | |
1389 catch_type, current_class(), CHECK_VERIFY(this)); | |
1390 if (!is_subclass) { | |
1391 // 4286534: should throw VerifyError according to recent spec change | |
1392 verify_error( | |
1393 "Catch type is not a subclass of Throwable in handler %d", | |
1394 handler_pc); | |
1395 return; | |
1396 } | |
1397 } | |
1398 if (start_pc < min) min = start_pc; | |
1399 if (end_pc > max) max = end_pc; | |
1400 } | |
1401 } | |
1402 } | |
1403 | |
1404 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1405 int localvariable_table_length = _method()->localvariable_table_length(); | |
1406 if (localvariable_table_length > 0) { | |
1407 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1408 for (int i = 0; i < localvariable_table_length; i++) { | |
1409 u2 start_bci = table[i].start_bci; | |
1410 u2 length = table[i].length; | |
1411 | |
1412 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1413 class_format_error( | |
1414 "Illegal local variable table start_pc %d", start_bci); | |
1415 return; | |
1416 } | |
1417 u4 end_bci = (u4)(start_bci + length); | |
1418 if (end_bci != code_length) { | |
1419 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1420 class_format_error( "Illegal local variable table length %d", length); | |
1421 return; | |
1422 } | |
1423 } | |
1424 } | |
1425 } | |
1426 } | |
1427 | |
1428 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1429 StackMapFrame* current_frame, | |
1430 StackMapTable* stackmap_table, | |
1431 bool no_control_flow, TRAPS) { | |
1432 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1433 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1434 if (no_control_flow && this_offset > bci) { | |
1435 verify_error(bci, "Expecting a stack map frame"); | |
1436 return 0; | |
1437 } | |
1438 if (this_offset == bci) { | |
1439 // See if current stack map can be assigned to the frame in table. | |
1440 // current_frame is the stackmap frame got from the last instruction. | |
1441 // If matched, current_frame will be updated by this method. | |
1442 bool match = stackmap_table->match_stackmap( | |
1443 current_frame, this_offset, stackmap_index, | |
1444 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1445 if (!match) { | |
1446 // report type error | |
1447 verify_error(bci, "Instruction type does not match stack map"); | |
1448 return 0; | |
1449 } | |
1450 stackmap_index++; | |
1451 } else if (this_offset < bci) { | |
1452 // current_offset should have met this_offset. | |
1453 class_format_error("Bad stack map offset %d", this_offset); | |
1454 return 0; | |
1455 } | |
1456 } else if (no_control_flow) { | |
1457 verify_error(bci, "Expecting a stack map frame"); | |
1458 return 0; | |
1459 } | |
1460 return stackmap_index; | |
1461 } | |
1462 | |
1463 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1464 StackMapTable* stackmap_table, TRAPS) { | |
1465 constantPoolHandle cp (THREAD, _method->constants()); | |
1466 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1467 if (exhandlers() != NULL) { | |
1468 for(int i = 0; i < exhandlers->length();) { | |
1469 u2 start_pc = exhandlers->int_at(i++); | |
1470 u2 end_pc = exhandlers->int_at(i++); | |
1471 u2 handler_pc = exhandlers->int_at(i++); | |
1472 int catch_type_index = exhandlers->int_at(i++); | |
1473 if(bci >= start_pc && bci < end_pc) { | |
1474 u1 flags = current_frame->flags(); | |
1475 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1476 | |
1477 ResourceMark rm(THREAD); | |
1478 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1479 if (catch_type_index != 0) { | |
1480 // We know that this index refers to a subclass of Throwable | |
1481 VerificationType catch_type = cp_index_to_type( | |
1482 catch_type_index, cp, CHECK_VERIFY(this)); | |
1483 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1484 } else { | |
1485 VerificationType throwable = | |
1486 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1487 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1488 } | |
1489 bool match = stackmap_table->match_stackmap( | |
1490 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1491 if (!match) { | |
1492 verify_error(bci, | |
1493 "Stack map does not match the one at exception handler %d", | |
1494 handler_pc); | |
1495 return; | |
1496 } | |
1497 } | |
1498 } | |
1499 } | |
1500 } | |
1501 | |
1502 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1503 int nconstants = cp->length(); | |
1504 if ((index <= 0) || (index >= nconstants)) { | |
1505 verify_error("Illegal constant pool index %d in class %s", | |
1506 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1507 return; | |
1508 } | |
1509 } | |
1510 | |
1511 void ClassVerifier::verify_cp_type( | |
1512 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1513 | |
1514 // In some situations, bytecode rewriting may occur while we're verifying. | |
1515 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1516 // instead. Be sure we don't pick up such indices by accident. |
1517 // We must check was_recursively_verified() before we get here. | |
1518 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1519 |
1520 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1521 unsigned int tag = cp->tag_at(index).value(); | |
1522 if ((types & (1 << tag)) == 0) { | |
1523 verify_error( | |
1524 "Illegal type at constant pool entry %d in class %s", | |
1525 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1526 return; | |
1527 } | |
1528 } | |
1529 | |
1530 void ClassVerifier::verify_cp_class_type( | |
1531 int index, constantPoolHandle cp, TRAPS) { | |
1532 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1533 constantTag tag = cp->tag_at(index); | |
1534 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1535 verify_error("Illegal type at constant pool entry %d in class %s", | |
1536 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1537 return; | |
1538 } | |
1539 } | |
1540 | |
1541 void ClassVerifier::format_error_message( | |
1542 const char* fmt, int offset, va_list va) { | |
1543 ResourceMark rm(_thread); | |
1544 stringStream message(_message, _message_buffer_len); | |
1545 message.vprint(fmt, va); | |
1546 if (!_method.is_null()) { | |
1547 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1548 } | |
1549 if (offset != -1) { | |
1550 message.print(" at offset %d", offset); | |
1551 } | |
1552 } | |
1553 | |
1554 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1555 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1556 va_list va; | |
1557 va_start(va, fmt); | |
1558 format_error_message(fmt, offset, va); | |
1559 va_end(va); | |
1560 } | |
1561 | |
1562 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1563 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1564 va_list va; | |
1565 va_start(va, fmt); | |
1566 format_error_message(fmt, -1, va); | |
1567 va_end(va); | |
1568 } | |
1569 | |
1570 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1571 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1572 va_list va; | |
1573 va_start(va, msg); | |
1574 format_error_message(msg, -1, va); | |
1575 va_end(va); | |
1576 } | |
1577 | |
1578 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) { | |
1579 // Get current loader and protection domain first. | |
1580 oop loader = current_class()->class_loader(); | |
1581 oop protection_domain = current_class()->protection_domain(); | |
1582 | |
1583 return SystemDictionary::resolve_or_fail( | |
1584 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1585 true, CHECK_NULL); | |
1586 } | |
1587 | |
1588 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1589 klassOop target_class, | |
1590 symbolOop field_name, | |
1591 symbolOop field_sig, | |
1592 bool is_method) { | |
1593 No_Safepoint_Verifier nosafepoint; | |
1594 | |
1595 // If target class isn't a super class of this class, we don't worry about this case | |
1596 if (!this_class->is_subclass_of(target_class)) { | |
1597 return false; | |
1598 } | |
1599 // Check if the specified method or field is protected | |
1600 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1601 fieldDescriptor fd; | |
1602 if (is_method) { | |
1603 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1604 if (m != NULL && m->is_protected()) { | |
1605 if (!this_class->is_same_class_package(m->method_holder())) { | |
1606 return true; | |
1607 } | |
1608 } | |
1609 } else { | |
1610 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1611 if(member_klass != NULL && fd.is_protected()) { | |
1612 if (!this_class->is_same_class_package(member_klass)) { | |
1613 return true; | |
1614 } | |
1615 } | |
1616 } | |
1617 return false; | |
1618 } | |
1619 | |
1620 void ClassVerifier::verify_ldc( | |
1621 int opcode, u2 index, StackMapFrame *current_frame, | |
1622 constantPoolHandle cp, u2 bci, TRAPS) { | |
1623 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1624 constantTag tag = cp->tag_at(index); | |
1625 unsigned int types; | |
1626 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1627 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1628 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1602 | 1629 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1630 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1631 // Note: The class file parser already verified the legality of | |
1632 // MethodHandle and MethodType constants. | |
0 | 1633 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
1634 } | |
1635 } else { | |
1636 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1637 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1638 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1639 } | |
431
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1640 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
1955
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diff
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|
1641 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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|
1642 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1643 current_frame->push_stack( |
1644 VerificationType::reference_type( | |
1645 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1646 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1647 current_frame->push_stack( | |
1648 VerificationType::reference_type( | |
1649 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1650 } else if (tag.is_int()) { | |
1651 current_frame->push_stack( | |
1652 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1653 } else if (tag.is_float()) { | |
1654 current_frame->push_stack( | |
1655 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1656 } else if (tag.is_double()) { | |
1657 current_frame->push_stack_2( | |
1658 VerificationType::double_type(), | |
1659 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1660 } else if (tag.is_long()) { | |
1661 current_frame->push_stack_2( | |
1662 VerificationType::long_type(), | |
1663 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 1664 } else if (tag.is_method_handle()) { |
1665 current_frame->push_stack( | |
1666 VerificationType::reference_type( | |
1667 vmSymbols::java_dyn_MethodHandle()), CHECK_VERIFY(this)); | |
1668 } else if (tag.is_method_type()) { | |
1669 current_frame->push_stack( | |
1670 VerificationType::reference_type( | |
1671 vmSymbols::java_dyn_MethodType()), CHECK_VERIFY(this)); | |
0 | 1672 } else { |
1673 verify_error(bci, "Invalid index in ldc"); | |
1674 return; | |
1675 } | |
1676 } | |
1677 | |
1678 void ClassVerifier::verify_switch( | |
1679 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1680 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1681 int bci = bcs->bci(); | |
1682 address bcp = bcs->bcp(); | |
1683 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1684 | |
1685 // 4639449 & 4647081: padding bytes must be 0 | |
1686 u2 padding_offset = 1; | |
1687 while ((bcp + padding_offset) < aligned_bcp) { | |
1688 if(*(bcp + padding_offset) != 0) { | |
1689 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1690 return; | |
1691 } | |
1692 padding_offset++; | |
1693 } | |
1694 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1695 int keys, delta; | |
1696 current_frame->pop_stack( | |
1697 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 1698 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 1699 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
1700 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1701 if (low > high) { | |
1702 verify_error(bci, | |
1703 "low must be less than or equal to high in tableswitch"); | |
1704 return; | |
1705 } | |
1706 keys = high - low + 1; | |
1707 if (keys < 0) { | |
1708 verify_error(bci, "too many keys in tableswitch"); | |
1709 return; | |
1710 } | |
1711 delta = 1; | |
1712 } else { | |
1713 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1714 if (keys < 0) { | |
1715 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1716 return; | |
1717 } | |
1718 delta = 2; | |
1719 // Make sure that the lookupswitch items are sorted | |
1720 for (int i = 0; i < (keys - 1); i++) { | |
1721 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1722 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1723 if (this_key >= next_key) { | |
1724 verify_error(bci, "Bad lookupswitch instruction"); | |
1725 return; | |
1726 } | |
1727 } | |
1728 } | |
1729 int target = bci + default_offset; | |
1730 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1731 for (int i = 0; i < keys; i++) { | |
1732 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1733 stackmap_table->check_jump_target( | |
1734 current_frame, target, CHECK_VERIFY(this)); | |
1735 } | |
1736 } | |
1737 | |
1738 bool ClassVerifier::name_in_supers( | |
1739 symbolOop ref_name, instanceKlassHandle current) { | |
1740 klassOop super = current->super(); | |
1741 while (super != NULL) { | |
1742 if (super->klass_part()->name() == ref_name) { | |
1743 return true; | |
1744 } | |
1745 super = super->klass_part()->super(); | |
1746 } | |
1747 return false; | |
1748 } | |
1749 | |
1750 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1751 StackMapFrame* current_frame, | |
1752 constantPoolHandle cp, | |
1753 TRAPS) { | |
1565 | 1754 u2 index = bcs->get_index_u2(); |
0 | 1755 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); |
1756 | |
1757 // Get field name and signature | |
1758 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index)); | |
1759 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index)); | |
1760 | |
1761 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1762 class_format_error( | |
1763 "Invalid signature for field in class %s referenced " | |
1764 "from constant pool index %d", _klass->external_name(), index); | |
1765 return; | |
1766 } | |
1767 | |
1768 // Get referenced class type | |
1769 VerificationType ref_class_type = cp_ref_index_to_type( | |
1770 index, cp, CHECK_VERIFY(this)); | |
1771 if (!ref_class_type.is_object()) { | |
1772 verify_error( | |
1773 "Expecting reference to class in class %s at constant pool index %d", | |
1774 _klass->external_name(), index); | |
1775 return; | |
1776 } | |
1777 VerificationType target_class_type = ref_class_type; | |
1778 | |
1779 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1780 "buffer type must match VerificationType size"); | |
1781 uintptr_t field_type_buffer[2]; | |
1782 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1783 // If we make a VerificationType[2] array directly, the compiler calls | |
1784 // to the c-runtime library to do the allocation instead of just | |
1785 // stack allocating it. Plus it would run constructors. This shows up | |
1786 // in performance profiles. | |
1787 | |
1788 SignatureStream sig_stream(field_sig, false); | |
1789 VerificationType stack_object_type; | |
1790 int n = change_sig_to_verificationType( | |
1791 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1792 u2 bci = bcs->bci(); | |
1793 bool is_assignable; | |
1565 | 1794 switch (bcs->raw_code()) { |
0 | 1795 case Bytecodes::_getstatic: { |
1796 for (int i = 0; i < n; i++) { | |
1797 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1798 } | |
1799 break; | |
1800 } | |
1801 case Bytecodes::_putstatic: { | |
1802 for (int i = n - 1; i >= 0; i--) { | |
1803 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1804 } | |
1805 break; | |
1806 } | |
1807 case Bytecodes::_getfield: { | |
1808 stack_object_type = current_frame->pop_stack( | |
1809 target_class_type, CHECK_VERIFY(this)); | |
1810 for (int i = 0; i < n; i++) { | |
1811 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1812 } | |
1813 goto check_protected; | |
1814 } | |
1815 case Bytecodes::_putfield: { | |
1816 for (int i = n - 1; i >= 0; i--) { | |
1817 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1818 } | |
1819 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1820 | |
1821 // The JVMS 2nd edition allows field initialization before the superclass | |
1822 // initializer, if the field is defined within the current class. | |
1823 fieldDescriptor fd; | |
1824 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1825 target_class_type.equals(current_type()) && | |
1826 _klass->find_local_field(field_name(), field_sig(), &fd)) { | |
1827 stack_object_type = current_type(); | |
1828 } | |
1829 is_assignable = target_class_type.is_assignable_from( | |
1830 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1831 if (!is_assignable) { | |
1832 verify_error(bci, "Bad type on operand stack in putfield"); | |
1833 return; | |
1834 } | |
1835 } | |
1836 check_protected: { | |
1837 if (_this_type == stack_object_type) | |
1838 break; // stack_object_type must be assignable to _current_class_type | |
1839 symbolHandle ref_class_name = symbolHandle(THREAD, | |
1840 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
1841 if (!name_in_supers(ref_class_name(), current_class())) | |
1842 // stack_object_type must be assignable to _current_class_type since: | |
1843 // 1. stack_object_type must be assignable to ref_class. | |
1844 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1845 // be a superclass of it. See revised JVMS 5.4.4. | |
1846 break; | |
1847 | |
1848 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
1849 if (is_protected_access(current_class(), ref_class_oop, field_name(), | |
1850 field_sig(), false)) { | |
1851 // It's protected access, check if stack object is assignable to | |
1852 // current class. | |
1853 is_assignable = current_type().is_assignable_from( | |
1854 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
1855 if (!is_assignable) { | |
1856 verify_error(bci, "Bad access to protected data in getfield"); | |
1857 return; | |
1858 } | |
1859 } | |
1860 break; | |
1861 } | |
1862 default: ShouldNotReachHere(); | |
1863 } | |
1864 } | |
1865 | |
1866 void ClassVerifier::verify_invoke_init( | |
1867 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1868 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1869 constantPoolHandle cp, TRAPS) { | |
1870 u2 bci = bcs->bci(); | |
1871 VerificationType type = current_frame->pop_stack( | |
1872 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1873 if (type == VerificationType::uninitialized_this_type()) { | |
1874 // The method must be an <init> method of either this class, or one of its | |
1875 // superclasses | |
1677 | 1876 if (ref_class_type.name() != current_class()->name() && |
1877 !name_in_supers(ref_class_type.name(), current_class())) { | |
0 | 1878 verify_error(bci, "Bad <init> method call"); |
1879 return; | |
1880 } | |
1881 current_frame->initialize_object(type, current_type()); | |
1882 *this_uninit = true; | |
1883 } else if (type.is_uninitialized()) { | |
1884 u2 new_offset = type.bci(); | |
1885 address new_bcp = bcs->bcp() - bci + new_offset; | |
1886 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1887 verify_error(new_offset, "Expecting new instruction"); | |
1888 return; | |
1889 } | |
1890 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1891 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1892 | |
1893 // The method must be an <init> method of the indicated class | |
1894 VerificationType new_class_type = cp_index_to_type( | |
1895 new_class_index, cp, CHECK_VERIFY(this)); | |
1896 if (!new_class_type.equals(ref_class_type)) { | |
1897 verify_error(bci, "Call to wrong <init> method"); | |
1898 return; | |
1899 } | |
1900 // According to the VM spec, if the referent class is a superclass of the | |
1901 // current class, and is in a different runtime package, and the method is | |
1902 // protected, then the objectref must be the current class or a subclass | |
1903 // of the current class. | |
1904 VerificationType objectref_type = new_class_type; | |
1905 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1906 klassOop ref_klass = load_class( | |
1907 ref_class_type.name(), CHECK_VERIFY(this)); | |
1908 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1909 vmSymbols::object_initializer_name(), | |
1565 | 1910 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 1911 instanceKlassHandle mh(THREAD, m->method_holder()); |
1912 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1913 bool assignable = current_type().is_assignable_from( | |
1914 objectref_type, current_class(), CHECK_VERIFY(this)); | |
1915 if (!assignable) { | |
1916 verify_error(bci, "Bad access to protected <init> method"); | |
1917 return; | |
1918 } | |
1919 } | |
1920 } | |
1921 current_frame->initialize_object(type, new_class_type); | |
1922 } else { | |
1923 verify_error(bci, "Bad operand type when invoking <init>"); | |
1924 return; | |
1925 } | |
1926 } | |
1927 | |
1928 void ClassVerifier::verify_invoke_instructions( | |
1929 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1930 bool *this_uninit, VerificationType return_type, | |
1931 constantPoolHandle cp, TRAPS) { | |
1932 // Make sure the constant pool item is the right type | |
1565 | 1933 u2 index = bcs->get_index_u2(); |
1934 Bytecodes::Code opcode = bcs->raw_code(); | |
0 | 1935 unsigned int types = (opcode == Bytecodes::_invokeinterface |
1936 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1937 : opcode == Bytecodes::_invokedynamic |
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1938 ? ((AllowTransitionalJSR292 ? 1 << JVM_CONSTANT_NameAndType : 0) |
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1939 |1 << JVM_CONSTANT_InvokeDynamic) |
0 | 1940 : 1 << JVM_CONSTANT_Methodref); |
1941 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1942 | |
1943 // Get method name and signature | |
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1944 symbolHandle method_name(THREAD, cp->name_ref_at(index)); |
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1945 symbolHandle method_sig(THREAD, cp->signature_ref_at(index)); |
0 | 1946 |
1947 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1948 class_format_error( | |
1949 "Invalid method signature in class %s referenced " | |
1950 "from constant pool index %d", _klass->external_name(), index); | |
1951 return; | |
1952 } | |
1953 | |
1954 // Get referenced class type | |
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1955 VerificationType ref_class_type; |
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1956 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 1957 if (!EnableInvokeDynamic || |
1958 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
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1959 class_format_error( |
1602 | 1960 (!EnableInvokeDynamic ? |
1961 "invokedynamic instructions not enabled in this JVM" : | |
1962 "invokedynamic instructions not supported by this class file version"), | |
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1963 _klass->external_name()); |
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1964 return; |
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1965 } |
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1966 } else { |
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1967 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1968 } |
0 | 1969 |
1970 // For a small signature length, we just allocate 128 bytes instead | |
1971 // of parsing the signature once to find its size. | |
1972 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1973 // longs/doubles to be consertive. | |
1974 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1975 "buffer type must match VerificationType size"); | |
1976 uintptr_t on_stack_sig_types_buffer[128]; | |
1977 // If we make a VerificationType[128] array directly, the compiler calls | |
1978 // to the c-runtime library to do the allocation instead of just | |
1979 // stack allocating it. Plus it would run constructors. This shows up | |
1980 // in performance profiles. | |
1981 | |
1982 VerificationType* sig_types; | |
1983 int size = (method_sig->utf8_length() - 3) * 2; | |
1984 if (size > 128) { | |
1985 // Long and double occupies two slots here. | |
1986 ArgumentSizeComputer size_it(method_sig); | |
1987 size = size_it.size(); | |
1988 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1989 } else{ | |
1990 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1991 } | |
1992 SignatureStream sig_stream(method_sig); | |
1993 int sig_i = 0; | |
1994 while (!sig_stream.at_return_type()) { | |
1995 sig_i += change_sig_to_verificationType( | |
1996 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
1997 sig_stream.next(); | |
1998 } | |
1999 int nargs = sig_i; | |
2000 | |
2001 #ifdef ASSERT | |
2002 { | |
2003 ArgumentSizeComputer size_it(method_sig); | |
2004 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
2005 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
2006 } | |
2007 #endif | |
2008 | |
2009 // Check instruction operands | |
2010 u2 bci = bcs->bci(); | |
2011 if (opcode == Bytecodes::_invokeinterface) { | |
2012 address bcp = bcs->bcp(); | |
2013 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
2014 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
2015 // the difference between the size of the operand stack before and after the instruction | |
2016 // executes. | |
2017 if (*(bcp+3) != (nargs+1)) { | |
2018 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
2019 return; | |
2020 } | |
2021 if (*(bcp+4) != 0) { | |
2022 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
2023 return; | |
2024 } | |
2025 } | |
2026 | |
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2027 if (opcode == Bytecodes::_invokedynamic) { |
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2028 address bcp = bcs->bcp(); |
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2029 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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2030 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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2031 return; |
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2032 } |
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2033 } |
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2034 |
0 | 2035 if (method_name->byte_at(0) == '<') { |
2036 // Make sure <init> can only be invoked by invokespecial | |
2037 if (opcode != Bytecodes::_invokespecial || | |
2038 method_name() != vmSymbols::object_initializer_name()) { | |
2039 verify_error(bci, "Illegal call to internal method"); | |
2040 return; | |
2041 } | |
2042 } else if (opcode == Bytecodes::_invokespecial | |
2043 && !ref_class_type.equals(current_type()) | |
2044 && !ref_class_type.equals(VerificationType::reference_type( | |
2045 current_class()->super()->klass_part()->name()))) { | |
2046 bool subtype = ref_class_type.is_assignable_from( | |
2047 current_type(), current_class(), CHECK_VERIFY(this)); | |
2048 if (!subtype) { | |
2049 verify_error(bci, "Bad invokespecial instruction: " | |
2050 "current class isn't assignable to reference class."); | |
2051 return; | |
2052 } | |
2053 } | |
2054 // Match method descriptor with operand stack | |
2055 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2056 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2057 } | |
2058 // Check objectref on operand stack | |
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2059 if (opcode != Bytecodes::_invokestatic && |
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2060 opcode != Bytecodes::_invokedynamic) { |
0 | 2061 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method |
2062 verify_invoke_init(bcs, ref_class_type, current_frame, | |
2063 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2064 } else { // other methods | |
2065 // Ensures that target class is assignable to method class. | |
2066 if (opcode == Bytecodes::_invokespecial) { | |
2067 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2068 } else if (opcode == Bytecodes::_invokevirtual) { | |
2069 VerificationType stack_object_type = | |
2070 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2071 if (current_type() != stack_object_type) { | |
2072 assert(cp->cache() == NULL, "not rewritten yet"); | |
2073 symbolHandle ref_class_name = symbolHandle(THREAD, | |
2074 cp->klass_name_at(cp->klass_ref_index_at(index))); | |
2075 // See the comments in verify_field_instructions() for | |
2076 // the rationale behind this. | |
2077 if (name_in_supers(ref_class_name(), current_class())) { | |
2078 klassOop ref_class = load_class(ref_class_name, CHECK); | |
2079 if (is_protected_access( | |
2080 _klass, ref_class, method_name(), method_sig(), true)) { | |
2081 // It's protected access, check if stack object is | |
2082 // assignable to current class. | |
2083 bool is_assignable = current_type().is_assignable_from( | |
2084 stack_object_type, current_class(), CHECK_VERIFY(this)); | |
2085 if (!is_assignable) { | |
2086 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2087 && stack_object_type.is_array() | |
2088 && method_name() == vmSymbols::clone_name()) { | |
2089 // Special case: arrays pretend to implement public Object | |
2090 // clone(). | |
2091 } else { | |
2092 verify_error(bci, | |
2093 "Bad access to protected data in invokevirtual"); | |
2094 return; | |
2095 } | |
2096 } | |
2097 } | |
2098 } | |
2099 } | |
2100 } else { | |
2101 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2102 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2103 } | |
2104 } | |
2105 } | |
2106 // Push the result type. | |
2107 if (sig_stream.type() != T_VOID) { | |
2108 if (method_name() == vmSymbols::object_initializer_name()) { | |
2109 // <init> method must have a void return type | |
2110 verify_error(bci, "Return type must be void in <init> method"); | |
2111 return; | |
2112 } | |
2113 VerificationType return_type[2]; | |
2114 int n = change_sig_to_verificationType( | |
2115 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2116 for (int i = 0; i < n; i++) { | |
2117 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2118 } | |
2119 } | |
2120 } | |
2121 | |
2122 VerificationType ClassVerifier::get_newarray_type( | |
2123 u2 index, u2 bci, TRAPS) { | |
2124 const char* from_bt[] = { | |
2125 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2126 }; | |
2127 if (index < T_BOOLEAN || index > T_LONG) { | |
2128 verify_error(bci, "Illegal newarray instruction"); | |
2129 return VerificationType::bogus_type(); | |
2130 } | |
2131 | |
2132 // from_bt[index] contains the array signature which has a length of 2 | |
2133 symbolHandle sig = oopFactory::new_symbol_handle( | |
2134 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); | |
2135 return VerificationType::reference_type(sig); | |
2136 } | |
2137 | |
2138 void ClassVerifier::verify_anewarray( | |
2139 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2140 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2141 current_frame->pop_stack( | |
2142 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2143 | |
2144 VerificationType component_type = | |
2145 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2146 ResourceMark rm(THREAD); | |
2147 int length; | |
2148 char* arr_sig_str; | |
2149 if (component_type.is_array()) { // it's an array | |
2150 const char* component_name = component_type.name()->as_utf8(); | |
2151 // add one dimension to component | |
2152 length = (int)strlen(component_name) + 1; | |
2153 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2154 arr_sig_str[0] = '['; | |
2155 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2156 } else { // it's an object or interface | |
2157 const char* component_name = component_type.name()->as_utf8(); | |
2158 // add one dimension to component with 'L' prepended and ';' postpended. | |
2159 length = (int)strlen(component_name) + 3; | |
2160 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2161 arr_sig_str[0] = '['; | |
2162 arr_sig_str[1] = 'L'; | |
2163 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2164 arr_sig_str[length - 1] = ';'; | |
2165 } | |
2166 symbolHandle arr_sig = oopFactory::new_symbol_handle( | |
2167 arr_sig_str, length, CHECK_VERIFY(this)); | |
2168 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2169 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2170 } | |
2171 | |
2172 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2173 current_frame->get_local( | |
2174 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2175 current_frame->push_stack( | |
2176 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2177 } | |
2178 | |
2179 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2180 current_frame->get_local_2( | |
2181 index, VerificationType::long_type(), | |
2182 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2183 current_frame->push_stack_2( | |
2184 VerificationType::long_type(), | |
2185 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2186 } | |
2187 | |
2188 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2189 current_frame->get_local( | |
2190 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2191 current_frame->push_stack( | |
2192 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2193 } | |
2194 | |
2195 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2196 current_frame->get_local_2( | |
2197 index, VerificationType::double_type(), | |
2198 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2199 current_frame->push_stack_2( | |
2200 VerificationType::double_type(), | |
2201 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2202 } | |
2203 | |
2204 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2205 VerificationType type = current_frame->get_local( | |
2206 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2207 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2208 } | |
2209 | |
2210 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2211 current_frame->pop_stack( | |
2212 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2213 current_frame->set_local( | |
2214 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2215 } | |
2216 | |
2217 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2218 current_frame->pop_stack_2( | |
2219 VerificationType::long2_type(), | |
2220 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2221 current_frame->set_local_2( | |
2222 index, VerificationType::long_type(), | |
2223 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2224 } | |
2225 | |
2226 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2227 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2228 current_frame->set_local( | |
2229 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2230 } | |
2231 | |
2232 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2233 current_frame->pop_stack_2( | |
2234 VerificationType::double2_type(), | |
2235 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2236 current_frame->set_local_2( | |
2237 index, VerificationType::double_type(), | |
2238 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2239 } | |
2240 | |
2241 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2242 VerificationType type = current_frame->pop_stack( | |
2243 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2244 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2245 } | |
2246 | |
2247 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2248 VerificationType type = current_frame->get_local( | |
2249 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2250 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2251 } | |
2252 | |
2253 void ClassVerifier::verify_return_value( | |
2254 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2255 if (return_type == VerificationType::bogus_type()) { | |
2256 verify_error(bci, "Method expects a return value"); | |
2257 return; | |
2258 } | |
2259 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this)); | |
2260 if (!match) { | |
2261 verify_error(bci, "Bad return type"); | |
2262 return; | |
2263 } | |
2264 } |