Mercurial > hg > truffle
annotate src/share/vm/classfile/verifier.cpp @ 2645:b2c1e959be46
Clean up around BlockBegin / StdEntry.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 14:34:29 +0200 |
parents | ed69575596ac |
children | e17b61ba7bb3 d558e01a72c0 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2011, 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 | |
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54 #ifdef TARGET_ARCH_arm |
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55 # include "bytes_arm.hpp" |
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56 #endif |
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57 #ifdef TARGET_ARCH_ppc |
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58 # include "bytes_ppc.hpp" |
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59 #endif |
0 | 60 |
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61 #define NOFAILOVER_MAJOR_VERSION 51 |
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62 |
0 | 63 // Access to external entry for VerifyClassCodes - old byte code verifier |
64 | |
65 extern "C" { | |
66 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint); | |
67 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint); | |
68 } | |
69 | |
70 static void* volatile _verify_byte_codes_fn = NULL; | |
71 | |
72 static volatile jint _is_new_verify_byte_codes_fn = (jint) true; | |
73 | |
74 static void* verify_byte_codes_fn() { | |
75 if (_verify_byte_codes_fn == NULL) { | |
76 void *lib_handle = os::native_java_library(); | |
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77 void *func = os::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion"); |
0 | 78 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
79 if (func == NULL) { | |
80 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false); | |
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81 func = os::dll_lookup(lib_handle, "VerifyClassCodes"); |
0 | 82 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func); |
83 } | |
84 } | |
85 return (void*)_verify_byte_codes_fn; | |
86 } | |
87 | |
88 | |
89 // Methods in Verifier | |
90 | |
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91 bool Verifier::should_verify_for(oop class_loader, bool should_verify_class) { |
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92 return (class_loader == NULL || !should_verify_class) ? |
0 | 93 BytecodeVerificationLocal : BytecodeVerificationRemote; |
94 } | |
95 | |
96 bool Verifier::relax_verify_for(oop loader) { | |
97 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader); | |
98 bool need_verify = | |
99 // verifyAll | |
100 (BytecodeVerificationLocal && BytecodeVerificationRemote) || | |
101 // verifyRemote | |
102 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted); | |
103 return !need_verify; | |
104 } | |
105 | |
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106 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, bool should_verify_class, TRAPS) { |
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107 HandleMark hm; |
0 | 108 ResourceMark rm(THREAD); |
109 | |
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110 Symbol* exception_name = NULL; |
0 | 111 const size_t message_buffer_len = klass->name()->utf8_length() + 1024; |
112 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len); | |
113 | |
114 const char* klassName = klass->external_name(); | |
115 | |
116 // If the class should be verified, first see if we can use the split | |
117 // verifier. If not, or if verification fails and FailOverToOldVerifier | |
118 // is set, then call the inference verifier. | |
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119 if (is_eligible_for_verification(klass, should_verify_class)) { |
0 | 120 if (TraceClassInitialization) { |
121 tty->print_cr("Start class verification for: %s", klassName); | |
122 } | |
123 if (UseSplitVerifier && | |
124 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) { | |
125 ClassVerifier split_verifier( | |
126 klass, message_buffer, message_buffer_len, THREAD); | |
127 split_verifier.verify_class(THREAD); | |
128 exception_name = split_verifier.result(); | |
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129 if (klass->major_version() < NOFAILOVER_MAJOR_VERSION && |
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130 FailOverToOldVerifier && !HAS_PENDING_EXCEPTION && |
0 | 131 (exception_name == vmSymbols::java_lang_VerifyError() || |
132 exception_name == vmSymbols::java_lang_ClassFormatError())) { | |
133 if (TraceClassInitialization) { | |
134 tty->print_cr( | |
135 "Fail over class verification to old verifier for: %s", klassName); | |
136 } | |
137 exception_name = inference_verify( | |
138 klass, message_buffer, message_buffer_len, THREAD); | |
139 } | |
140 } else { | |
141 exception_name = inference_verify( | |
142 klass, message_buffer, message_buffer_len, THREAD); | |
143 } | |
144 | |
145 if (TraceClassInitialization) { | |
146 if (HAS_PENDING_EXCEPTION) { | |
147 tty->print("Verification for %s has", klassName); | |
148 tty->print_cr(" exception pending %s ", | |
149 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name()); | |
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150 } else if (exception_name != NULL) { |
0 | 151 tty->print_cr("Verification for %s failed", klassName); |
152 } | |
153 tty->print_cr("End class verification for: %s", klassName); | |
154 } | |
155 } | |
156 | |
157 if (HAS_PENDING_EXCEPTION) { | |
158 return false; // use the existing exception | |
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159 } else if (exception_name == NULL) { |
0 | 160 return true; // verifcation succeeded |
161 } else { // VerifyError or ClassFormatError to be created and thrown | |
162 ResourceMark rm(THREAD); | |
163 instanceKlassHandle kls = | |
164 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false); | |
165 while (!kls.is_null()) { | |
166 if (kls == klass) { | |
167 // If the class being verified is the exception we're creating | |
168 // or one of it's superclasses, we're in trouble and are going | |
169 // to infinitely recurse when we try to initialize the exception. | |
170 // So bail out here by throwing the preallocated VM error. | |
171 THROW_OOP_(Universe::virtual_machine_error_instance(), false); | |
172 } | |
173 kls = kls->super(); | |
174 } | |
175 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure | |
176 THROW_MSG_(exception_name, message_buffer, false); | |
177 } | |
178 } | |
179 | |
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180 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class) { |
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181 Symbol* name = klass->name(); |
1142 | 182 klassOop refl_magic_klass = SystemDictionary::reflect_MagicAccessorImpl_klass(); |
0 | 183 |
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184 return (should_verify_for(klass->class_loader(), should_verify_class) && |
0 | 185 // return if the class is a bootstrapping class |
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186 // or defineClass specified not to verify by default (flags override passed arg) |
0 | 187 // We need to skip the following four for bootstraping |
188 name != vmSymbols::java_lang_Object() && | |
189 name != vmSymbols::java_lang_Class() && | |
190 name != vmSymbols::java_lang_String() && | |
191 name != vmSymbols::java_lang_Throwable() && | |
192 | |
193 // Can not verify the bytecodes for shared classes because they have | |
194 // already been rewritten to contain constant pool cache indices, | |
195 // which the verifier can't understand. | |
196 // Shared classes shouldn't have stackmaps either. | |
197 !klass()->is_shared() && | |
198 | |
199 // As of the fix for 4486457 we disable verification for all of the | |
200 // dynamically-generated bytecodes associated with the 1.4 | |
201 // reflection implementation, not just those associated with | |
202 // sun/reflect/SerializationConstructorAccessor. | |
203 // NOTE: this is called too early in the bootstrapping process to be | |
204 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection. | |
205 (refl_magic_klass == NULL || | |
206 !klass->is_subtype_of(refl_magic_klass) || | |
207 VerifyReflectionBytecodes) | |
208 ); | |
209 } | |
210 | |
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211 Symbol* Verifier::inference_verify( |
0 | 212 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) { |
213 JavaThread* thread = (JavaThread*)THREAD; | |
214 JNIEnv *env = thread->jni_environment(); | |
215 | |
216 void* verify_func = verify_byte_codes_fn(); | |
217 | |
218 if (verify_func == NULL) { | |
219 jio_snprintf(message, message_len, "Could not link verifier"); | |
220 return vmSymbols::java_lang_VerifyError(); | |
221 } | |
222 | |
223 ResourceMark rm(THREAD); | |
224 if (ClassVerifier::_verify_verbose) { | |
225 tty->print_cr("Verifying class %s with old format", klass->external_name()); | |
226 } | |
227 | |
228 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror()); | |
229 jint result; | |
230 | |
231 { | |
232 HandleMark hm(thread); | |
233 ThreadToNativeFromVM ttn(thread); | |
234 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint | |
235 // code knows that we have left the VM | |
236 | |
237 if (_is_new_verify_byte_codes_fn) { | |
238 verify_byte_codes_fn_new_t func = | |
239 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func); | |
240 result = (*func)(env, cls, message, (int)message_len, | |
241 klass->major_version()); | |
242 } else { | |
243 verify_byte_codes_fn_t func = | |
244 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func); | |
245 result = (*func)(env, cls, message, (int)message_len); | |
246 } | |
247 } | |
248 | |
249 JNIHandles::destroy_local(cls); | |
250 | |
251 // These numbers are chosen so that VerifyClassCodes interface doesn't need | |
252 // to be changed (still return jboolean (unsigned char)), and result is | |
253 // 1 when verification is passed. | |
254 if (result == 0) { | |
255 return vmSymbols::java_lang_VerifyError(); | |
256 } else if (result == 1) { | |
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257 return NULL; // verified. |
0 | 258 } else if (result == 2) { |
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259 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, NULL); |
0 | 260 } else if (result == 3) { |
261 return vmSymbols::java_lang_ClassFormatError(); | |
262 } else { | |
263 ShouldNotReachHere(); | |
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264 return NULL; |
0 | 265 } |
266 } | |
267 | |
268 // Methods in ClassVerifier | |
269 | |
270 bool ClassVerifier::_verify_verbose = false; | |
271 | |
272 ClassVerifier::ClassVerifier( | |
273 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS) | |
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274 : _thread(THREAD), _exception_type(NULL), _message(msg), |
0 | 275 _message_buffer_len(msg_len), _klass(klass) { |
276 _this_type = VerificationType::reference_type(klass->name()); | |
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277 // Create list to hold symbols in reference area. |
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278 _symbols = new GrowableArray<Symbol*>(100, 0, NULL); |
0 | 279 } |
280 | |
281 ClassVerifier::~ClassVerifier() { | |
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282 // Decrement the reference count for any symbols created. |
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283 for (int i = 0; i < _symbols->length(); i++) { |
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284 Symbol* s = _symbols->at(i); |
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285 s->decrement_refcount(); |
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286 } |
0 | 287 } |
288 | |
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289 VerificationType ClassVerifier::object_type() const { |
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290 return VerificationType::reference_type(vmSymbols::java_lang_Object()); |
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291 } |
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292 |
0 | 293 void ClassVerifier::verify_class(TRAPS) { |
294 if (_verify_verbose) { | |
295 tty->print_cr("Verifying class %s with new format", | |
296 _klass->external_name()); | |
297 } | |
298 | |
299 objArrayHandle methods(THREAD, _klass->methods()); | |
300 int num_methods = methods->length(); | |
301 | |
302 for (int index = 0; index < num_methods; index++) { | |
1570 | 303 // Check for recursive re-verification before each method. |
304 if (was_recursively_verified()) return; | |
305 | |
0 | 306 methodOop m = (methodOop)methods->obj_at(index); |
307 if (m->is_native() || m->is_abstract()) { | |
308 // If m is native or abstract, skip it. It is checked in class file | |
309 // parser that methods do not override a final method. | |
310 continue; | |
311 } | |
312 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this)); | |
313 } | |
1570 | 314 |
315 if (_verify_verbose || TraceClassInitialization) { | |
316 if (was_recursively_verified()) | |
317 tty->print_cr("Recursive verification detected for: %s", | |
318 _klass->external_name()); | |
319 } | |
0 | 320 } |
321 | |
322 void ClassVerifier::verify_method(methodHandle m, TRAPS) { | |
323 _method = m; // initialize _method | |
324 if (_verify_verbose) { | |
325 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string()); | |
326 } | |
327 | |
328 const char* bad_type_msg = "Bad type on operand stack in %s"; | |
329 | |
330 int32_t max_stack = m->max_stack(); | |
331 int32_t max_locals = m->max_locals(); | |
332 constantPoolHandle cp(THREAD, m->constants()); | |
333 | |
334 if (!SignatureVerifier::is_valid_method_signature(m->signature())) { | |
335 class_format_error("Invalid method signature"); | |
336 return; | |
337 } | |
338 | |
339 // Initial stack map frame: offset is 0, stack is initially empty. | |
340 StackMapFrame current_frame(max_locals, max_stack, this); | |
341 // Set initial locals | |
342 VerificationType return_type = current_frame.set_locals_from_arg( | |
343 m, current_type(), CHECK_VERIFY(this)); | |
344 | |
345 int32_t stackmap_index = 0; // index to the stackmap array | |
346 | |
347 u4 code_length = m->code_size(); | |
348 | |
349 // Scan the bytecode and map each instruction's start offset to a number. | |
350 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this)); | |
351 | |
352 int ex_min = code_length; | |
353 int ex_max = -1; | |
354 // Look through each item on the exception table. Each of the fields must refer | |
355 // to a legal instruction. | |
356 verify_exception_handler_table( | |
357 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this)); | |
358 | |
359 // Look through each entry on the local variable table and make sure | |
360 // its range of code array offsets is valid. (4169817) | |
361 if (m->has_localvariable_table()) { | |
362 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this)); | |
363 } | |
364 | |
365 typeArrayHandle stackmap_data(THREAD, m->stackmap_data()); | |
366 StackMapStream stream(stackmap_data); | |
367 StackMapReader reader(this, &stream, code_data, code_length, THREAD); | |
368 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack, | |
369 code_data, code_length, CHECK_VERIFY(this)); | |
370 | |
371 if (_verify_verbose) { | |
372 stackmap_table.print(); | |
373 } | |
374 | |
375 RawBytecodeStream bcs(m); | |
376 | |
377 // Scan the byte code linearly from the start to the end | |
378 bool no_control_flow = false; // Set to true when there is no direct control | |
379 // flow from current instruction to the next | |
380 // instruction in sequence | |
381 Bytecodes::Code opcode; | |
382 while (!bcs.is_last_bytecode()) { | |
1570 | 383 // Check for recursive re-verification before each bytecode. |
384 if (was_recursively_verified()) return; | |
385 | |
0 | 386 opcode = bcs.raw_next(); |
387 u2 bci = bcs.bci(); | |
388 | |
389 // Set current frame's offset to bci | |
390 current_frame.set_offset(bci); | |
391 | |
392 // Make sure every offset in stackmap table point to the beginning to | |
393 // an instruction. Match current_frame to stackmap_table entry with | |
394 // the same offset if exists. | |
395 stackmap_index = verify_stackmap_table( | |
396 stackmap_index, bci, ¤t_frame, &stackmap_table, | |
397 no_control_flow, CHECK_VERIFY(this)); | |
398 | |
399 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this' | |
400 | |
401 // Merge with the next instruction | |
402 { | |
403 u2 index; | |
404 int target; | |
405 VerificationType type, type2; | |
406 VerificationType atype; | |
407 | |
408 #ifndef PRODUCT | |
409 if (_verify_verbose) { | |
410 current_frame.print(); | |
411 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode)); | |
412 } | |
413 #endif | |
414 | |
415 // Make sure wide instruction is in correct format | |
416 if (bcs.is_wide()) { | |
417 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload && | |
418 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload && | |
419 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore && | |
420 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload && | |
421 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore && | |
422 opcode != Bytecodes::_dstore) { | |
423 verify_error(bci, "Bad wide instruction"); | |
424 return; | |
425 } | |
426 } | |
427 | |
428 switch (opcode) { | |
429 case Bytecodes::_nop : | |
430 no_control_flow = false; break; | |
431 case Bytecodes::_aconst_null : | |
432 current_frame.push_stack( | |
433 VerificationType::null_type(), CHECK_VERIFY(this)); | |
434 no_control_flow = false; break; | |
435 case Bytecodes::_iconst_m1 : | |
436 case Bytecodes::_iconst_0 : | |
437 case Bytecodes::_iconst_1 : | |
438 case Bytecodes::_iconst_2 : | |
439 case Bytecodes::_iconst_3 : | |
440 case Bytecodes::_iconst_4 : | |
441 case Bytecodes::_iconst_5 : | |
442 current_frame.push_stack( | |
443 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
444 no_control_flow = false; break; | |
445 case Bytecodes::_lconst_0 : | |
446 case Bytecodes::_lconst_1 : | |
447 current_frame.push_stack_2( | |
448 VerificationType::long_type(), | |
449 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
450 no_control_flow = false; break; | |
451 case Bytecodes::_fconst_0 : | |
452 case Bytecodes::_fconst_1 : | |
453 case Bytecodes::_fconst_2 : | |
454 current_frame.push_stack( | |
455 VerificationType::float_type(), CHECK_VERIFY(this)); | |
456 no_control_flow = false; break; | |
457 case Bytecodes::_dconst_0 : | |
458 case Bytecodes::_dconst_1 : | |
459 current_frame.push_stack_2( | |
460 VerificationType::double_type(), | |
461 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
462 no_control_flow = false; break; | |
463 case Bytecodes::_sipush : | |
464 case Bytecodes::_bipush : | |
465 current_frame.push_stack( | |
466 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
467 no_control_flow = false; break; | |
468 case Bytecodes::_ldc : | |
469 verify_ldc( | |
1565 | 470 opcode, bcs.get_index_u1(), ¤t_frame, |
0 | 471 cp, bci, CHECK_VERIFY(this)); |
472 no_control_flow = false; break; | |
473 case Bytecodes::_ldc_w : | |
474 case Bytecodes::_ldc2_w : | |
475 verify_ldc( | |
1565 | 476 opcode, bcs.get_index_u2(), ¤t_frame, |
0 | 477 cp, bci, CHECK_VERIFY(this)); |
478 no_control_flow = false; break; | |
479 case Bytecodes::_iload : | |
480 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
481 no_control_flow = false; break; | |
482 case Bytecodes::_iload_0 : | |
483 case Bytecodes::_iload_1 : | |
484 case Bytecodes::_iload_2 : | |
485 case Bytecodes::_iload_3 : | |
486 index = opcode - Bytecodes::_iload_0; | |
487 verify_iload(index, ¤t_frame, CHECK_VERIFY(this)); | |
488 no_control_flow = false; break; | |
489 case Bytecodes::_lload : | |
490 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
491 no_control_flow = false; break; | |
492 case Bytecodes::_lload_0 : | |
493 case Bytecodes::_lload_1 : | |
494 case Bytecodes::_lload_2 : | |
495 case Bytecodes::_lload_3 : | |
496 index = opcode - Bytecodes::_lload_0; | |
497 verify_lload(index, ¤t_frame, CHECK_VERIFY(this)); | |
498 no_control_flow = false; break; | |
499 case Bytecodes::_fload : | |
500 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
501 no_control_flow = false; break; | |
502 case Bytecodes::_fload_0 : | |
503 case Bytecodes::_fload_1 : | |
504 case Bytecodes::_fload_2 : | |
505 case Bytecodes::_fload_3 : | |
506 index = opcode - Bytecodes::_fload_0; | |
507 verify_fload(index, ¤t_frame, CHECK_VERIFY(this)); | |
508 no_control_flow = false; break; | |
509 case Bytecodes::_dload : | |
510 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
511 no_control_flow = false; break; | |
512 case Bytecodes::_dload_0 : | |
513 case Bytecodes::_dload_1 : | |
514 case Bytecodes::_dload_2 : | |
515 case Bytecodes::_dload_3 : | |
516 index = opcode - Bytecodes::_dload_0; | |
517 verify_dload(index, ¤t_frame, CHECK_VERIFY(this)); | |
518 no_control_flow = false; break; | |
519 case Bytecodes::_aload : | |
520 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
521 no_control_flow = false; break; | |
522 case Bytecodes::_aload_0 : | |
523 case Bytecodes::_aload_1 : | |
524 case Bytecodes::_aload_2 : | |
525 case Bytecodes::_aload_3 : | |
526 index = opcode - Bytecodes::_aload_0; | |
527 verify_aload(index, ¤t_frame, CHECK_VERIFY(this)); | |
528 no_control_flow = false; break; | |
529 case Bytecodes::_iaload : | |
530 type = current_frame.pop_stack( | |
531 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
532 atype = current_frame.pop_stack( | |
533 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
534 if (!atype.is_int_array()) { | |
535 verify_error(bci, bad_type_msg, "iaload"); | |
536 return; | |
537 } | |
538 current_frame.push_stack( | |
539 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
540 no_control_flow = false; break; | |
541 case Bytecodes::_baload : | |
542 type = current_frame.pop_stack( | |
543 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
544 atype = current_frame.pop_stack( | |
545 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
546 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
547 verify_error(bci, bad_type_msg, "baload"); | |
548 return; | |
549 } | |
550 current_frame.push_stack( | |
551 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
552 no_control_flow = false; break; | |
553 case Bytecodes::_caload : | |
554 type = current_frame.pop_stack( | |
555 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
556 atype = current_frame.pop_stack( | |
557 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
558 if (!atype.is_char_array()) { | |
559 verify_error(bci, bad_type_msg, "caload"); | |
560 return; | |
561 } | |
562 current_frame.push_stack( | |
563 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
564 no_control_flow = false; break; | |
565 case Bytecodes::_saload : | |
566 type = current_frame.pop_stack( | |
567 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
568 atype = current_frame.pop_stack( | |
569 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
570 if (!atype.is_short_array()) { | |
571 verify_error(bci, bad_type_msg, "saload"); | |
572 return; | |
573 } | |
574 current_frame.push_stack( | |
575 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
576 no_control_flow = false; break; | |
577 case Bytecodes::_laload : | |
578 type = current_frame.pop_stack( | |
579 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
580 atype = current_frame.pop_stack( | |
581 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
582 if (!atype.is_long_array()) { | |
583 verify_error(bci, bad_type_msg, "laload"); | |
584 return; | |
585 } | |
586 current_frame.push_stack_2( | |
587 VerificationType::long_type(), | |
588 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
589 no_control_flow = false; break; | |
590 case Bytecodes::_faload : | |
591 type = current_frame.pop_stack( | |
592 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
593 atype = current_frame.pop_stack( | |
594 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
595 if (!atype.is_float_array()) { | |
596 verify_error(bci, bad_type_msg, "faload"); | |
597 return; | |
598 } | |
599 current_frame.push_stack( | |
600 VerificationType::float_type(), CHECK_VERIFY(this)); | |
601 no_control_flow = false; break; | |
602 case Bytecodes::_daload : | |
603 type = current_frame.pop_stack( | |
604 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
605 atype = current_frame.pop_stack( | |
606 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
607 if (!atype.is_double_array()) { | |
608 verify_error(bci, bad_type_msg, "daload"); | |
609 return; | |
610 } | |
611 current_frame.push_stack_2( | |
612 VerificationType::double_type(), | |
613 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
614 no_control_flow = false; break; | |
615 case Bytecodes::_aaload : { | |
616 type = current_frame.pop_stack( | |
617 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
618 atype = current_frame.pop_stack( | |
619 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
620 if (!atype.is_reference_array()) { | |
621 verify_error(bci, bad_type_msg, "aaload"); | |
622 return; | |
623 } | |
624 if (atype.is_null()) { | |
625 current_frame.push_stack( | |
626 VerificationType::null_type(), CHECK_VERIFY(this)); | |
627 } else { | |
628 VerificationType component = | |
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629 atype.get_component(this, CHECK_VERIFY(this)); |
0 | 630 current_frame.push_stack(component, CHECK_VERIFY(this)); |
631 } | |
632 no_control_flow = false; break; | |
633 } | |
634 case Bytecodes::_istore : | |
635 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
636 no_control_flow = false; break; | |
637 case Bytecodes::_istore_0 : | |
638 case Bytecodes::_istore_1 : | |
639 case Bytecodes::_istore_2 : | |
640 case Bytecodes::_istore_3 : | |
641 index = opcode - Bytecodes::_istore_0; | |
642 verify_istore(index, ¤t_frame, CHECK_VERIFY(this)); | |
643 no_control_flow = false; break; | |
644 case Bytecodes::_lstore : | |
645 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
646 no_control_flow = false; break; | |
647 case Bytecodes::_lstore_0 : | |
648 case Bytecodes::_lstore_1 : | |
649 case Bytecodes::_lstore_2 : | |
650 case Bytecodes::_lstore_3 : | |
651 index = opcode - Bytecodes::_lstore_0; | |
652 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
653 no_control_flow = false; break; | |
654 case Bytecodes::_fstore : | |
655 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
656 no_control_flow = false; break; | |
657 case Bytecodes::_fstore_0 : | |
658 case Bytecodes::_fstore_1 : | |
659 case Bytecodes::_fstore_2 : | |
660 case Bytecodes::_fstore_3 : | |
661 index = opcode - Bytecodes::_fstore_0; | |
662 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
663 no_control_flow = false; break; | |
664 case Bytecodes::_dstore : | |
665 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
666 no_control_flow = false; break; | |
667 case Bytecodes::_dstore_0 : | |
668 case Bytecodes::_dstore_1 : | |
669 case Bytecodes::_dstore_2 : | |
670 case Bytecodes::_dstore_3 : | |
671 index = opcode - Bytecodes::_dstore_0; | |
672 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this)); | |
673 no_control_flow = false; break; | |
674 case Bytecodes::_astore : | |
675 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
676 no_control_flow = false; break; | |
677 case Bytecodes::_astore_0 : | |
678 case Bytecodes::_astore_1 : | |
679 case Bytecodes::_astore_2 : | |
680 case Bytecodes::_astore_3 : | |
681 index = opcode - Bytecodes::_astore_0; | |
682 verify_astore(index, ¤t_frame, CHECK_VERIFY(this)); | |
683 no_control_flow = false; break; | |
684 case Bytecodes::_iastore : | |
685 type = current_frame.pop_stack( | |
686 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
687 type2 = current_frame.pop_stack( | |
688 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
689 atype = current_frame.pop_stack( | |
690 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
691 if (!atype.is_int_array()) { | |
692 verify_error(bci, bad_type_msg, "iastore"); | |
693 return; | |
694 } | |
695 no_control_flow = false; break; | |
696 case Bytecodes::_bastore : | |
697 type = current_frame.pop_stack( | |
698 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
699 type2 = current_frame.pop_stack( | |
700 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
701 atype = current_frame.pop_stack( | |
702 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
703 if (!atype.is_bool_array() && !atype.is_byte_array()) { | |
704 verify_error(bci, bad_type_msg, "bastore"); | |
705 return; | |
706 } | |
707 no_control_flow = false; break; | |
708 case Bytecodes::_castore : | |
709 current_frame.pop_stack( | |
710 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
711 current_frame.pop_stack( | |
712 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
713 atype = current_frame.pop_stack( | |
714 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
715 if (!atype.is_char_array()) { | |
716 verify_error(bci, bad_type_msg, "castore"); | |
717 return; | |
718 } | |
719 no_control_flow = false; break; | |
720 case Bytecodes::_sastore : | |
721 current_frame.pop_stack( | |
722 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
723 current_frame.pop_stack( | |
724 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
725 atype = current_frame.pop_stack( | |
726 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
727 if (!atype.is_short_array()) { | |
728 verify_error(bci, bad_type_msg, "sastore"); | |
729 return; | |
730 } | |
731 no_control_flow = false; break; | |
732 case Bytecodes::_lastore : | |
733 current_frame.pop_stack_2( | |
734 VerificationType::long2_type(), | |
735 VerificationType::long_type(), CHECK_VERIFY(this)); | |
736 current_frame.pop_stack( | |
737 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
738 atype = current_frame.pop_stack( | |
739 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
740 if (!atype.is_long_array()) { | |
741 verify_error(bci, bad_type_msg, "lastore"); | |
742 return; | |
743 } | |
744 no_control_flow = false; break; | |
745 case Bytecodes::_fastore : | |
746 current_frame.pop_stack( | |
747 VerificationType::float_type(), CHECK_VERIFY(this)); | |
748 current_frame.pop_stack | |
749 (VerificationType::integer_type(), CHECK_VERIFY(this)); | |
750 atype = current_frame.pop_stack( | |
751 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
752 if (!atype.is_float_array()) { | |
753 verify_error(bci, bad_type_msg, "fastore"); | |
754 return; | |
755 } | |
756 no_control_flow = false; break; | |
757 case Bytecodes::_dastore : | |
758 current_frame.pop_stack_2( | |
759 VerificationType::double2_type(), | |
760 VerificationType::double_type(), CHECK_VERIFY(this)); | |
761 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 if (!atype.is_double_array()) { | |
766 verify_error(bci, bad_type_msg, "dastore"); | |
767 return; | |
768 } | |
769 no_control_flow = false; break; | |
770 case Bytecodes::_aastore : | |
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771 type = current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 772 type2 = current_frame.pop_stack( |
773 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
774 atype = current_frame.pop_stack( | |
775 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
776 // more type-checking is done at runtime | |
777 if (!atype.is_reference_array()) { | |
778 verify_error(bci, bad_type_msg, "aastore"); | |
779 return; | |
780 } | |
781 // 4938384: relaxed constraint in JVMS 3nd edition. | |
782 no_control_flow = false; break; | |
783 case Bytecodes::_pop : | |
784 current_frame.pop_stack( | |
785 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
786 no_control_flow = false; break; | |
787 case Bytecodes::_pop2 : | |
788 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
789 if (type.is_category1()) { | |
790 current_frame.pop_stack( | |
791 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
792 } else if (type.is_category2_2nd()) { | |
793 current_frame.pop_stack( | |
794 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
795 } else { | |
796 verify_error(bci, bad_type_msg, "pop2"); | |
797 return; | |
798 } | |
799 no_control_flow = false; break; | |
800 case Bytecodes::_dup : | |
801 type = current_frame.pop_stack( | |
802 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
803 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
804 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
805 no_control_flow = false; break; | |
806 case Bytecodes::_dup_x1 : | |
807 type = current_frame.pop_stack( | |
808 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
809 type2 = current_frame.pop_stack( | |
810 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
811 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
812 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
813 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
814 no_control_flow = false; break; | |
815 case Bytecodes::_dup_x2 : | |
816 { | |
817 VerificationType type3; | |
818 type = current_frame.pop_stack( | |
819 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
820 type2 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
821 if (type2.is_category1()) { | |
822 type3 = current_frame.pop_stack( | |
823 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
824 } else if (type2.is_category2_2nd()) { | |
825 type3 = current_frame.pop_stack( | |
826 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
827 } else { | |
828 verify_error(bci, bad_type_msg, "dup_x2"); | |
829 return; | |
830 } | |
831 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
832 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
833 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
834 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
835 no_control_flow = false; break; | |
836 } | |
837 case Bytecodes::_dup2 : | |
838 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
839 if (type.is_category1()) { | |
840 type2 = current_frame.pop_stack( | |
841 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
842 } else if (type.is_category2_2nd()) { | |
843 type2 = current_frame.pop_stack( | |
844 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
845 } else { | |
846 verify_error(bci, bad_type_msg, "dup2"); | |
847 return; | |
848 } | |
849 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
850 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
851 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
852 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
853 no_control_flow = false; break; | |
854 case Bytecodes::_dup2_x1 : | |
855 { | |
856 VerificationType type3; | |
857 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
858 if (type.is_category1()) { | |
859 type2 = current_frame.pop_stack( | |
860 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
861 } else if(type.is_category2_2nd()) { | |
862 type2 = current_frame.pop_stack | |
863 (VerificationType::category2_check(), CHECK_VERIFY(this)); | |
864 } else { | |
865 verify_error(bci, bad_type_msg, "dup2_x1"); | |
866 return; | |
867 } | |
868 type3 = current_frame.pop_stack( | |
869 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
870 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
871 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
872 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
873 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
874 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
875 no_control_flow = false; break; | |
876 } | |
877 case Bytecodes::_dup2_x2 : | |
878 { | |
879 VerificationType type3, type4; | |
880 type = current_frame.pop_stack(CHECK_VERIFY(this)); | |
881 if (type.is_category1()) { | |
882 type2 = current_frame.pop_stack( | |
883 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
884 } else if (type.is_category2_2nd()) { | |
885 type2 = 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 type3 = current_frame.pop_stack(CHECK_VERIFY(this)); | |
892 if (type3.is_category1()) { | |
893 type4 = current_frame.pop_stack( | |
894 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
895 } else if (type3.is_category2_2nd()) { | |
896 type4 = current_frame.pop_stack( | |
897 VerificationType::category2_check(), CHECK_VERIFY(this)); | |
898 } else { | |
899 verify_error(bci, bad_type_msg, "dup2_x2"); | |
900 return; | |
901 } | |
902 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
903 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
904 current_frame.push_stack(type4, CHECK_VERIFY(this)); | |
905 current_frame.push_stack(type3, CHECK_VERIFY(this)); | |
906 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
907 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
908 no_control_flow = false; break; | |
909 } | |
910 case Bytecodes::_swap : | |
911 type = current_frame.pop_stack( | |
912 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
913 type2 = current_frame.pop_stack( | |
914 VerificationType::category1_check(), CHECK_VERIFY(this)); | |
915 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
916 current_frame.push_stack(type2, CHECK_VERIFY(this)); | |
917 no_control_flow = false; break; | |
918 case Bytecodes::_iadd : | |
919 case Bytecodes::_isub : | |
920 case Bytecodes::_imul : | |
921 case Bytecodes::_idiv : | |
922 case Bytecodes::_irem : | |
923 case Bytecodes::_ishl : | |
924 case Bytecodes::_ishr : | |
925 case Bytecodes::_iushr : | |
926 case Bytecodes::_ior : | |
927 case Bytecodes::_ixor : | |
928 case Bytecodes::_iand : | |
929 current_frame.pop_stack( | |
930 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
931 // fall through | |
932 case Bytecodes::_ineg : | |
933 current_frame.pop_stack( | |
934 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
935 current_frame.push_stack( | |
936 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
937 no_control_flow = false; break; | |
938 case Bytecodes::_ladd : | |
939 case Bytecodes::_lsub : | |
940 case Bytecodes::_lmul : | |
941 case Bytecodes::_ldiv : | |
942 case Bytecodes::_lrem : | |
943 case Bytecodes::_land : | |
944 case Bytecodes::_lor : | |
945 case Bytecodes::_lxor : | |
946 current_frame.pop_stack_2( | |
947 VerificationType::long2_type(), | |
948 VerificationType::long_type(), CHECK_VERIFY(this)); | |
949 // fall through | |
950 case Bytecodes::_lneg : | |
951 current_frame.pop_stack_2( | |
952 VerificationType::long2_type(), | |
953 VerificationType::long_type(), CHECK_VERIFY(this)); | |
954 current_frame.push_stack_2( | |
955 VerificationType::long_type(), | |
956 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
957 no_control_flow = false; break; | |
958 case Bytecodes::_lshl : | |
959 case Bytecodes::_lshr : | |
960 case Bytecodes::_lushr : | |
961 current_frame.pop_stack( | |
962 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
963 current_frame.pop_stack_2( | |
964 VerificationType::long2_type(), | |
965 VerificationType::long_type(), CHECK_VERIFY(this)); | |
966 current_frame.push_stack_2( | |
967 VerificationType::long_type(), | |
968 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
969 no_control_flow = false; break; | |
970 case Bytecodes::_fadd : | |
971 case Bytecodes::_fsub : | |
972 case Bytecodes::_fmul : | |
973 case Bytecodes::_fdiv : | |
974 case Bytecodes::_frem : | |
975 current_frame.pop_stack( | |
976 VerificationType::float_type(), CHECK_VERIFY(this)); | |
977 // fall through | |
978 case Bytecodes::_fneg : | |
979 current_frame.pop_stack( | |
980 VerificationType::float_type(), CHECK_VERIFY(this)); | |
981 current_frame.push_stack( | |
982 VerificationType::float_type(), CHECK_VERIFY(this)); | |
983 no_control_flow = false; break; | |
984 case Bytecodes::_dadd : | |
985 case Bytecodes::_dsub : | |
986 case Bytecodes::_dmul : | |
987 case Bytecodes::_ddiv : | |
988 case Bytecodes::_drem : | |
989 current_frame.pop_stack_2( | |
990 VerificationType::double2_type(), | |
991 VerificationType::double_type(), CHECK_VERIFY(this)); | |
992 // fall through | |
993 case Bytecodes::_dneg : | |
994 current_frame.pop_stack_2( | |
995 VerificationType::double2_type(), | |
996 VerificationType::double_type(), CHECK_VERIFY(this)); | |
997 current_frame.push_stack_2( | |
998 VerificationType::double_type(), | |
999 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1000 no_control_flow = false; break; | |
1001 case Bytecodes::_iinc : | |
1002 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this)); | |
1003 no_control_flow = false; break; | |
1004 case Bytecodes::_i2l : | |
1005 type = current_frame.pop_stack( | |
1006 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1007 current_frame.push_stack_2( | |
1008 VerificationType::long_type(), | |
1009 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1010 no_control_flow = false; break; | |
1011 case Bytecodes::_l2i : | |
1012 current_frame.pop_stack_2( | |
1013 VerificationType::long2_type(), | |
1014 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1015 current_frame.push_stack( | |
1016 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1017 no_control_flow = false; break; | |
1018 case Bytecodes::_i2f : | |
1019 current_frame.pop_stack( | |
1020 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1021 current_frame.push_stack( | |
1022 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1023 no_control_flow = false; break; | |
1024 case Bytecodes::_i2d : | |
1025 current_frame.pop_stack( | |
1026 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1027 current_frame.push_stack_2( | |
1028 VerificationType::double_type(), | |
1029 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1030 no_control_flow = false; break; | |
1031 case Bytecodes::_l2f : | |
1032 current_frame.pop_stack_2( | |
1033 VerificationType::long2_type(), | |
1034 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1035 current_frame.push_stack( | |
1036 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1037 no_control_flow = false; break; | |
1038 case Bytecodes::_l2d : | |
1039 current_frame.pop_stack_2( | |
1040 VerificationType::long2_type(), | |
1041 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1042 current_frame.push_stack_2( | |
1043 VerificationType::double_type(), | |
1044 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1045 no_control_flow = false; break; | |
1046 case Bytecodes::_f2i : | |
1047 current_frame.pop_stack( | |
1048 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1049 current_frame.push_stack( | |
1050 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1051 no_control_flow = false; break; | |
1052 case Bytecodes::_f2l : | |
1053 current_frame.pop_stack( | |
1054 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1055 current_frame.push_stack_2( | |
1056 VerificationType::long_type(), | |
1057 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1058 no_control_flow = false; break; | |
1059 case Bytecodes::_f2d : | |
1060 current_frame.pop_stack( | |
1061 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1062 current_frame.push_stack_2( | |
1063 VerificationType::double_type(), | |
1064 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1065 no_control_flow = false; break; | |
1066 case Bytecodes::_d2i : | |
1067 current_frame.pop_stack_2( | |
1068 VerificationType::double2_type(), | |
1069 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1070 current_frame.push_stack( | |
1071 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1072 no_control_flow = false; break; | |
1073 case Bytecodes::_d2l : | |
1074 current_frame.pop_stack_2( | |
1075 VerificationType::double2_type(), | |
1076 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1077 current_frame.push_stack_2( | |
1078 VerificationType::long_type(), | |
1079 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1080 no_control_flow = false; break; | |
1081 case Bytecodes::_d2f : | |
1082 current_frame.pop_stack_2( | |
1083 VerificationType::double2_type(), | |
1084 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1085 current_frame.push_stack( | |
1086 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1087 no_control_flow = false; break; | |
1088 case Bytecodes::_i2b : | |
1089 case Bytecodes::_i2c : | |
1090 case Bytecodes::_i2s : | |
1091 current_frame.pop_stack( | |
1092 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1093 current_frame.push_stack( | |
1094 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1095 no_control_flow = false; break; | |
1096 case Bytecodes::_lcmp : | |
1097 current_frame.pop_stack_2( | |
1098 VerificationType::long2_type(), | |
1099 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1100 current_frame.pop_stack_2( | |
1101 VerificationType::long2_type(), | |
1102 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1103 current_frame.push_stack( | |
1104 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1105 no_control_flow = false; break; | |
1106 case Bytecodes::_fcmpl : | |
1107 case Bytecodes::_fcmpg : | |
1108 current_frame.pop_stack( | |
1109 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1110 current_frame.pop_stack( | |
1111 VerificationType::float_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::_dcmpl : | |
1116 case Bytecodes::_dcmpg : | |
1117 current_frame.pop_stack_2( | |
1118 VerificationType::double2_type(), | |
1119 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1120 current_frame.pop_stack_2( | |
1121 VerificationType::double2_type(), | |
1122 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1123 current_frame.push_stack( | |
1124 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1125 no_control_flow = false; break; | |
1126 case Bytecodes::_if_icmpeq: | |
1127 case Bytecodes::_if_icmpne: | |
1128 case Bytecodes::_if_icmplt: | |
1129 case Bytecodes::_if_icmpge: | |
1130 case Bytecodes::_if_icmpgt: | |
1131 case Bytecodes::_if_icmple: | |
1132 current_frame.pop_stack( | |
1133 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1134 // fall through | |
1135 case Bytecodes::_ifeq: | |
1136 case Bytecodes::_ifne: | |
1137 case Bytecodes::_iflt: | |
1138 case Bytecodes::_ifge: | |
1139 case Bytecodes::_ifgt: | |
1140 case Bytecodes::_ifle: | |
1141 current_frame.pop_stack( | |
1142 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1143 target = bcs.dest(); | |
1144 stackmap_table.check_jump_target( | |
1145 ¤t_frame, target, CHECK_VERIFY(this)); | |
1146 no_control_flow = false; break; | |
1147 case Bytecodes::_if_acmpeq : | |
1148 case Bytecodes::_if_acmpne : | |
1149 current_frame.pop_stack( | |
1150 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1151 // fall through | |
1152 case Bytecodes::_ifnull : | |
1153 case Bytecodes::_ifnonnull : | |
1154 current_frame.pop_stack( | |
1155 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1156 target = bcs.dest(); | |
1157 stackmap_table.check_jump_target | |
1158 (¤t_frame, target, CHECK_VERIFY(this)); | |
1159 no_control_flow = false; break; | |
1160 case Bytecodes::_goto : | |
1161 target = bcs.dest(); | |
1162 stackmap_table.check_jump_target( | |
1163 ¤t_frame, target, CHECK_VERIFY(this)); | |
1164 no_control_flow = true; break; | |
1165 case Bytecodes::_goto_w : | |
1166 target = bcs.dest_w(); | |
1167 stackmap_table.check_jump_target( | |
1168 ¤t_frame, target, CHECK_VERIFY(this)); | |
1169 no_control_flow = true; break; | |
1170 case Bytecodes::_tableswitch : | |
1171 case Bytecodes::_lookupswitch : | |
1172 verify_switch( | |
1173 &bcs, code_length, code_data, ¤t_frame, | |
1174 &stackmap_table, CHECK_VERIFY(this)); | |
1175 no_control_flow = true; break; | |
1176 case Bytecodes::_ireturn : | |
1177 type = current_frame.pop_stack( | |
1178 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1179 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1180 no_control_flow = true; break; | |
1181 case Bytecodes::_lreturn : | |
1182 type2 = current_frame.pop_stack( | |
1183 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1184 type = current_frame.pop_stack( | |
1185 VerificationType::long_type(), CHECK_VERIFY(this)); | |
1186 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1187 no_control_flow = true; break; | |
1188 case Bytecodes::_freturn : | |
1189 type = current_frame.pop_stack( | |
1190 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1191 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1192 no_control_flow = true; break; | |
1193 case Bytecodes::_dreturn : | |
1194 type2 = current_frame.pop_stack( | |
1195 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1196 type = current_frame.pop_stack( | |
1197 VerificationType::double_type(), CHECK_VERIFY(this)); | |
1198 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1199 no_control_flow = true; break; | |
1200 case Bytecodes::_areturn : | |
1201 type = current_frame.pop_stack( | |
1202 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1203 verify_return_value(return_type, type, bci, CHECK_VERIFY(this)); | |
1204 no_control_flow = true; break; | |
1205 case Bytecodes::_return : | |
1206 if (return_type != VerificationType::bogus_type()) { | |
1207 verify_error(bci, "Method expects no return value"); | |
1208 return; | |
1209 } | |
1210 // Make sure "this" has been initialized if current method is an | |
1211 // <init> | |
1212 if (_method->name() == vmSymbols::object_initializer_name() && | |
1213 current_frame.flag_this_uninit()) { | |
1214 verify_error(bci, | |
1215 "Constructor must call super() or this() before return"); | |
1216 return; | |
1217 } | |
1218 no_control_flow = true; break; | |
1219 case Bytecodes::_getstatic : | |
1220 case Bytecodes::_putstatic : | |
1221 case Bytecodes::_getfield : | |
1222 case Bytecodes::_putfield : | |
1223 verify_field_instructions( | |
1224 &bcs, ¤t_frame, cp, CHECK_VERIFY(this)); | |
1225 no_control_flow = false; break; | |
1226 case Bytecodes::_invokevirtual : | |
1227 case Bytecodes::_invokespecial : | |
1228 case Bytecodes::_invokestatic : | |
1229 verify_invoke_instructions( | |
1230 &bcs, code_length, ¤t_frame, | |
1231 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1232 no_control_flow = false; break; | |
1233 case Bytecodes::_invokeinterface : | |
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diff
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|
1234 case Bytecodes::_invokedynamic : |
0 | 1235 verify_invoke_instructions( |
1236 &bcs, code_length, ¤t_frame, | |
1237 &this_uninit, return_type, cp, CHECK_VERIFY(this)); | |
1238 no_control_flow = false; break; | |
1239 case Bytecodes::_new : | |
1240 { | |
1565 | 1241 index = bcs.get_index_u2(); |
0 | 1242 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
1243 VerificationType new_class_type = | |
1244 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1245 if (!new_class_type.is_object()) { | |
1246 verify_error(bci, "Illegal new instruction"); | |
1247 return; | |
1248 } | |
1249 type = VerificationType::uninitialized_type(bci); | |
1250 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1251 no_control_flow = false; break; | |
1252 } | |
1253 case Bytecodes::_newarray : | |
1254 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this)); | |
1255 current_frame.pop_stack( | |
1256 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1257 current_frame.push_stack(type, CHECK_VERIFY(this)); | |
1258 no_control_flow = false; break; | |
1259 case Bytecodes::_anewarray : | |
1260 verify_anewarray( | |
1565 | 1261 bcs.get_index_u2(), cp, ¤t_frame, CHECK_VERIFY(this)); |
0 | 1262 no_control_flow = false; break; |
1263 case Bytecodes::_arraylength : | |
1264 type = current_frame.pop_stack( | |
1265 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
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diff
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|
1266 if (!(type.is_null() || type.is_array())) { |
0 | 1267 verify_error(bci, bad_type_msg, "arraylength"); |
1268 } | |
1269 current_frame.push_stack( | |
1270 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1271 no_control_flow = false; break; | |
1272 case Bytecodes::_checkcast : | |
1273 { | |
1565 | 1274 index = bcs.get_index_u2(); |
0 | 1275 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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diff
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|
1276 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1277 VerificationType klass_type = cp_index_to_type( |
1278 index, cp, CHECK_VERIFY(this)); | |
1279 current_frame.push_stack(klass_type, CHECK_VERIFY(this)); | |
1280 no_control_flow = false; break; | |
1281 } | |
1282 case Bytecodes::_instanceof : { | |
1565 | 1283 index = bcs.get_index_u2(); |
0 | 1284 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); |
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|
1285 current_frame.pop_stack(object_type(), CHECK_VERIFY(this)); |
0 | 1286 current_frame.push_stack( |
1287 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1288 no_control_flow = false; break; | |
1289 } | |
1290 case Bytecodes::_monitorenter : | |
1291 case Bytecodes::_monitorexit : | |
1292 current_frame.pop_stack( | |
1293 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1294 no_control_flow = false; break; | |
1295 case Bytecodes::_multianewarray : | |
1296 { | |
1565 | 1297 index = bcs.get_index_u2(); |
0 | 1298 u2 dim = *(bcs.bcp()+3); |
1299 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
1300 VerificationType new_array_type = | |
1301 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
1302 if (!new_array_type.is_array()) { | |
1303 verify_error(bci, | |
1304 "Illegal constant pool index in multianewarray instruction"); | |
1305 return; | |
1306 } | |
1307 if (dim < 1 || new_array_type.dimensions() < dim) { | |
1308 verify_error(bci, | |
1309 "Illegal dimension in multianewarray instruction"); | |
1310 return; | |
1311 } | |
1312 for (int i = 0; i < dim; i++) { | |
1313 current_frame.pop_stack( | |
1314 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1315 } | |
1316 current_frame.push_stack(new_array_type, CHECK_VERIFY(this)); | |
1317 no_control_flow = false; break; | |
1318 } | |
1319 case Bytecodes::_athrow : | |
1320 type = VerificationType::reference_type( | |
1321 vmSymbols::java_lang_Throwable()); | |
1322 current_frame.pop_stack(type, CHECK_VERIFY(this)); | |
1323 no_control_flow = true; break; | |
1324 default: | |
1325 // We only need to check the valid bytecodes in class file. | |
1326 // And jsr and ret are not in the new class file format in JDK1.5. | |
1327 verify_error(bci, "Bad instruction"); | |
1328 no_control_flow = false; | |
1329 return; | |
1330 } // end switch | |
1331 } // end Merge with the next instruction | |
1332 | |
1333 // Look for possible jump target in exception handlers and see if it | |
1334 // matches current_frame | |
1335 if (bci >= ex_min && bci < ex_max) { | |
1336 verify_exception_handler_targets( | |
1337 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this)); | |
1338 } | |
1339 } // end while | |
1340 | |
1341 // Make sure that control flow does not fall through end of the method | |
1342 if (!no_control_flow) { | |
1343 verify_error(code_length, "Control flow falls through code end"); | |
1344 return; | |
1345 } | |
1346 } | |
1347 | |
1348 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) { | |
1349 char* code_data = NEW_RESOURCE_ARRAY(char, code_length); | |
1350 memset(code_data, 0, sizeof(char) * code_length); | |
1351 RawBytecodeStream bcs(m); | |
1352 | |
1353 while (!bcs.is_last_bytecode()) { | |
1354 if (bcs.raw_next() != Bytecodes::_illegal) { | |
1355 int bci = bcs.bci(); | |
1565 | 1356 if (bcs.raw_code() == Bytecodes::_new) { |
0 | 1357 code_data[bci] = NEW_OFFSET; |
1358 } else { | |
1359 code_data[bci] = BYTECODE_OFFSET; | |
1360 } | |
1361 } else { | |
1362 verify_error(bcs.bci(), "Bad instruction"); | |
1363 return NULL; | |
1364 } | |
1365 } | |
1366 | |
1367 return code_data; | |
1368 } | |
1369 | |
1370 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) { | |
1371 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1372 constantPoolHandle cp (THREAD, _method->constants()); | |
1373 | |
1374 if (exhandlers() != NULL) { | |
1375 for(int i = 0; i < exhandlers->length();) { | |
1376 u2 start_pc = exhandlers->int_at(i++); | |
1377 u2 end_pc = exhandlers->int_at(i++); | |
1378 u2 handler_pc = exhandlers->int_at(i++); | |
1379 if (start_pc >= code_length || code_data[start_pc] == 0) { | |
1380 class_format_error("Illegal exception table start_pc %d", start_pc); | |
1381 return; | |
1382 } | |
1383 if (end_pc != code_length) { // special case: end_pc == code_length | |
1384 if (end_pc > code_length || code_data[end_pc] == 0) { | |
1385 class_format_error("Illegal exception table end_pc %d", end_pc); | |
1386 return; | |
1387 } | |
1388 } | |
1389 if (handler_pc >= code_length || code_data[handler_pc] == 0) { | |
1390 class_format_error("Illegal exception table handler_pc %d", handler_pc); | |
1391 return; | |
1392 } | |
1393 int catch_type_index = exhandlers->int_at(i++); | |
1394 if (catch_type_index != 0) { | |
1395 VerificationType catch_type = cp_index_to_type( | |
1396 catch_type_index, cp, CHECK_VERIFY(this)); | |
1397 VerificationType throwable = | |
1398 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1399 bool is_subclass = throwable.is_assignable_from( | |
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1400 catch_type, this, CHECK_VERIFY(this)); |
0 | 1401 if (!is_subclass) { |
1402 // 4286534: should throw VerifyError according to recent spec change | |
1403 verify_error( | |
1404 "Catch type is not a subclass of Throwable in handler %d", | |
1405 handler_pc); | |
1406 return; | |
1407 } | |
1408 } | |
1409 if (start_pc < min) min = start_pc; | |
1410 if (end_pc > max) max = end_pc; | |
1411 } | |
1412 } | |
1413 } | |
1414 | |
1415 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) { | |
1416 int localvariable_table_length = _method()->localvariable_table_length(); | |
1417 if (localvariable_table_length > 0) { | |
1418 LocalVariableTableElement* table = _method()->localvariable_table_start(); | |
1419 for (int i = 0; i < localvariable_table_length; i++) { | |
1420 u2 start_bci = table[i].start_bci; | |
1421 u2 length = table[i].length; | |
1422 | |
1423 if (start_bci >= code_length || code_data[start_bci] == 0) { | |
1424 class_format_error( | |
1425 "Illegal local variable table start_pc %d", start_bci); | |
1426 return; | |
1427 } | |
1428 u4 end_bci = (u4)(start_bci + length); | |
1429 if (end_bci != code_length) { | |
1430 if (end_bci >= code_length || code_data[end_bci] == 0) { | |
1431 class_format_error( "Illegal local variable table length %d", length); | |
1432 return; | |
1433 } | |
1434 } | |
1435 } | |
1436 } | |
1437 } | |
1438 | |
1439 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci, | |
1440 StackMapFrame* current_frame, | |
1441 StackMapTable* stackmap_table, | |
1442 bool no_control_flow, TRAPS) { | |
1443 if (stackmap_index < stackmap_table->get_frame_count()) { | |
1444 u2 this_offset = stackmap_table->get_offset(stackmap_index); | |
1445 if (no_control_flow && this_offset > bci) { | |
1446 verify_error(bci, "Expecting a stack map frame"); | |
1447 return 0; | |
1448 } | |
1449 if (this_offset == bci) { | |
1450 // See if current stack map can be assigned to the frame in table. | |
1451 // current_frame is the stackmap frame got from the last instruction. | |
1452 // If matched, current_frame will be updated by this method. | |
1453 bool match = stackmap_table->match_stackmap( | |
1454 current_frame, this_offset, stackmap_index, | |
1455 !no_control_flow, true, CHECK_VERIFY_(this, 0)); | |
1456 if (!match) { | |
1457 // report type error | |
1458 verify_error(bci, "Instruction type does not match stack map"); | |
1459 return 0; | |
1460 } | |
1461 stackmap_index++; | |
1462 } else if (this_offset < bci) { | |
1463 // current_offset should have met this_offset. | |
1464 class_format_error("Bad stack map offset %d", this_offset); | |
1465 return 0; | |
1466 } | |
1467 } else if (no_control_flow) { | |
1468 verify_error(bci, "Expecting a stack map frame"); | |
1469 return 0; | |
1470 } | |
1471 return stackmap_index; | |
1472 } | |
1473 | |
1474 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame, | |
1475 StackMapTable* stackmap_table, TRAPS) { | |
1476 constantPoolHandle cp (THREAD, _method->constants()); | |
1477 typeArrayHandle exhandlers (THREAD, _method->exception_table()); | |
1478 if (exhandlers() != NULL) { | |
1479 for(int i = 0; i < exhandlers->length();) { | |
1480 u2 start_pc = exhandlers->int_at(i++); | |
1481 u2 end_pc = exhandlers->int_at(i++); | |
1482 u2 handler_pc = exhandlers->int_at(i++); | |
1483 int catch_type_index = exhandlers->int_at(i++); | |
1484 if(bci >= start_pc && bci < end_pc) { | |
1485 u1 flags = current_frame->flags(); | |
1486 if (this_uninit) { flags |= FLAG_THIS_UNINIT; } | |
1487 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags); | |
1488 if (catch_type_index != 0) { | |
1489 // We know that this index refers to a subclass of Throwable | |
1490 VerificationType catch_type = cp_index_to_type( | |
1491 catch_type_index, cp, CHECK_VERIFY(this)); | |
1492 new_frame->push_stack(catch_type, CHECK_VERIFY(this)); | |
1493 } else { | |
1494 VerificationType throwable = | |
1495 VerificationType::reference_type(vmSymbols::java_lang_Throwable()); | |
1496 new_frame->push_stack(throwable, CHECK_VERIFY(this)); | |
1497 } | |
1498 bool match = stackmap_table->match_stackmap( | |
1499 new_frame, handler_pc, true, false, CHECK_VERIFY(this)); | |
1500 if (!match) { | |
1501 verify_error(bci, | |
1502 "Stack map does not match the one at exception handler %d", | |
1503 handler_pc); | |
1504 return; | |
1505 } | |
1506 } | |
1507 } | |
1508 } | |
1509 } | |
1510 | |
1511 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) { | |
1512 int nconstants = cp->length(); | |
1513 if ((index <= 0) || (index >= nconstants)) { | |
1514 verify_error("Illegal constant pool index %d in class %s", | |
1515 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1516 return; | |
1517 } | |
1518 } | |
1519 | |
1520 void ClassVerifier::verify_cp_type( | |
1521 int index, constantPoolHandle cp, unsigned int types, TRAPS) { | |
1522 | |
1523 // In some situations, bytecode rewriting may occur while we're verifying. | |
1524 // In this case, a constant pool cache exists and some indices refer to that | |
1570 | 1525 // instead. Be sure we don't pick up such indices by accident. |
1526 // We must check was_recursively_verified() before we get here. | |
1527 guarantee(cp->cache() == NULL, "not rewritten yet"); | |
0 | 1528 |
1529 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1530 unsigned int tag = cp->tag_at(index).value(); | |
1531 if ((types & (1 << tag)) == 0) { | |
1532 verify_error( | |
1533 "Illegal type at constant pool entry %d in class %s", | |
1534 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1535 return; | |
1536 } | |
1537 } | |
1538 | |
1539 void ClassVerifier::verify_cp_class_type( | |
1540 int index, constantPoolHandle cp, TRAPS) { | |
1541 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1542 constantTag tag = cp->tag_at(index); | |
1543 if (!tag.is_klass() && !tag.is_unresolved_klass()) { | |
1544 verify_error("Illegal type at constant pool entry %d in class %s", | |
1545 index, instanceKlass::cast(cp->pool_holder())->external_name()); | |
1546 return; | |
1547 } | |
1548 } | |
1549 | |
1550 void ClassVerifier::format_error_message( | |
1551 const char* fmt, int offset, va_list va) { | |
1552 ResourceMark rm(_thread); | |
1553 stringStream message(_message, _message_buffer_len); | |
1554 message.vprint(fmt, va); | |
1555 if (!_method.is_null()) { | |
1556 message.print(" in method %s", _method->name_and_sig_as_C_string()); | |
1557 } | |
1558 if (offset != -1) { | |
1559 message.print(" at offset %d", offset); | |
1560 } | |
1561 } | |
1562 | |
1563 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) { | |
1564 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1565 va_list va; | |
1566 va_start(va, fmt); | |
1567 format_error_message(fmt, offset, va); | |
1568 va_end(va); | |
1569 } | |
1570 | |
1571 void ClassVerifier::verify_error(const char* fmt, ...) { | |
1572 _exception_type = vmSymbols::java_lang_VerifyError(); | |
1573 va_list va; | |
1574 va_start(va, fmt); | |
1575 format_error_message(fmt, -1, va); | |
1576 va_end(va); | |
1577 } | |
1578 | |
1579 void ClassVerifier::class_format_error(const char* msg, ...) { | |
1580 _exception_type = vmSymbols::java_lang_ClassFormatError(); | |
1581 va_list va; | |
1582 va_start(va, msg); | |
1583 format_error_message(msg, -1, va); | |
1584 va_end(va); | |
1585 } | |
1586 | |
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1587 klassOop ClassVerifier::load_class(Symbol* name, TRAPS) { |
0 | 1588 // Get current loader and protection domain first. |
1589 oop loader = current_class()->class_loader(); | |
1590 oop protection_domain = current_class()->protection_domain(); | |
1591 | |
1592 return SystemDictionary::resolve_or_fail( | |
1593 name, Handle(THREAD, loader), Handle(THREAD, protection_domain), | |
1594 true, CHECK_NULL); | |
1595 } | |
1596 | |
1597 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class, | |
1598 klassOop target_class, | |
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1599 Symbol* field_name, |
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1600 Symbol* field_sig, |
0 | 1601 bool is_method) { |
1602 No_Safepoint_Verifier nosafepoint; | |
1603 | |
1604 // If target class isn't a super class of this class, we don't worry about this case | |
1605 if (!this_class->is_subclass_of(target_class)) { | |
1606 return false; | |
1607 } | |
1608 // Check if the specified method or field is protected | |
1609 instanceKlass* target_instance = instanceKlass::cast(target_class); | |
1610 fieldDescriptor fd; | |
1611 if (is_method) { | |
1612 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig); | |
1613 if (m != NULL && m->is_protected()) { | |
1614 if (!this_class->is_same_class_package(m->method_holder())) { | |
1615 return true; | |
1616 } | |
1617 } | |
1618 } else { | |
1619 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd); | |
1620 if(member_klass != NULL && fd.is_protected()) { | |
1621 if (!this_class->is_same_class_package(member_klass)) { | |
1622 return true; | |
1623 } | |
1624 } | |
1625 } | |
1626 return false; | |
1627 } | |
1628 | |
1629 void ClassVerifier::verify_ldc( | |
1630 int opcode, u2 index, StackMapFrame *current_frame, | |
1631 constantPoolHandle cp, u2 bci, TRAPS) { | |
1632 verify_cp_index(cp, index, CHECK_VERIFY(this)); | |
1633 constantTag tag = cp->tag_at(index); | |
1634 unsigned int types; | |
1635 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) { | |
1636 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) { | |
1637 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float) | |
1602 | 1638 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class) |
1639 | (1 << JVM_CONSTANT_MethodHandle) | (1 << JVM_CONSTANT_MethodType); | |
1640 // Note: The class file parser already verified the legality of | |
1641 // MethodHandle and MethodType constants. | |
0 | 1642 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); |
1643 } | |
1644 } else { | |
1645 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w"); | |
1646 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long); | |
1647 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1648 } | |
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1649 if (tag.is_string() && cp->is_pseudo_string_at(index)) { |
1955
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diff
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1650 current_frame->push_stack(object_type(), CHECK_VERIFY(this)); |
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1651 } else if (tag.is_string() || tag.is_unresolved_string()) { |
0 | 1652 current_frame->push_stack( |
1653 VerificationType::reference_type( | |
1654 vmSymbols::java_lang_String()), CHECK_VERIFY(this)); | |
1655 } else if (tag.is_klass() || tag.is_unresolved_klass()) { | |
1656 current_frame->push_stack( | |
1657 VerificationType::reference_type( | |
1658 vmSymbols::java_lang_Class()), CHECK_VERIFY(this)); | |
1659 } else if (tag.is_int()) { | |
1660 current_frame->push_stack( | |
1661 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1662 } else if (tag.is_float()) { | |
1663 current_frame->push_stack( | |
1664 VerificationType::float_type(), CHECK_VERIFY(this)); | |
1665 } else if (tag.is_double()) { | |
1666 current_frame->push_stack_2( | |
1667 VerificationType::double_type(), | |
1668 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
1669 } else if (tag.is_long()) { | |
1670 current_frame->push_stack_2( | |
1671 VerificationType::long_type(), | |
1672 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
1602 | 1673 } else if (tag.is_method_handle()) { |
1674 current_frame->push_stack( | |
1675 VerificationType::reference_type( | |
2460 | 1676 vmSymbols::java_lang_invoke_MethodHandle()), CHECK_VERIFY(this)); |
1602 | 1677 } else if (tag.is_method_type()) { |
1678 current_frame->push_stack( | |
1679 VerificationType::reference_type( | |
2460 | 1680 vmSymbols::java_lang_invoke_MethodType()), CHECK_VERIFY(this)); |
0 | 1681 } else { |
1682 verify_error(bci, "Invalid index in ldc"); | |
1683 return; | |
1684 } | |
1685 } | |
1686 | |
1687 void ClassVerifier::verify_switch( | |
1688 RawBytecodeStream* bcs, u4 code_length, char* code_data, | |
1689 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) { | |
1690 int bci = bcs->bci(); | |
1691 address bcp = bcs->bcp(); | |
1692 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize); | |
1693 | |
1694 // 4639449 & 4647081: padding bytes must be 0 | |
1695 u2 padding_offset = 1; | |
1696 while ((bcp + padding_offset) < aligned_bcp) { | |
1697 if(*(bcp + padding_offset) != 0) { | |
1698 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch"); | |
1699 return; | |
1700 } | |
1701 padding_offset++; | |
1702 } | |
1703 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp); | |
1704 int keys, delta; | |
1705 current_frame->pop_stack( | |
1706 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
1565 | 1707 if (bcs->raw_code() == Bytecodes::_tableswitch) { |
0 | 1708 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); |
1709 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); | |
1710 if (low > high) { | |
1711 verify_error(bci, | |
1712 "low must be less than or equal to high in tableswitch"); | |
1713 return; | |
1714 } | |
1715 keys = high - low + 1; | |
1716 if (keys < 0) { | |
1717 verify_error(bci, "too many keys in tableswitch"); | |
1718 return; | |
1719 } | |
1720 delta = 1; | |
1721 } else { | |
1722 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize); | |
1723 if (keys < 0) { | |
1724 verify_error(bci, "number of keys in lookupswitch less than 0"); | |
1725 return; | |
1726 } | |
1727 delta = 2; | |
1728 // Make sure that the lookupswitch items are sorted | |
1729 for (int i = 0; i < (keys - 1); i++) { | |
1730 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize); | |
1731 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize); | |
1732 if (this_key >= next_key) { | |
1733 verify_error(bci, "Bad lookupswitch instruction"); | |
1734 return; | |
1735 } | |
1736 } | |
1737 } | |
1738 int target = bci + default_offset; | |
1739 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this)); | |
1740 for (int i = 0; i < keys; i++) { | |
1741 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize); | |
1742 stackmap_table->check_jump_target( | |
1743 current_frame, target, CHECK_VERIFY(this)); | |
1744 } | |
1745 } | |
1746 | |
1747 bool ClassVerifier::name_in_supers( | |
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diff
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|
1748 Symbol* ref_name, instanceKlassHandle current) { |
0 | 1749 klassOop super = current->super(); |
1750 while (super != NULL) { | |
1751 if (super->klass_part()->name() == ref_name) { | |
1752 return true; | |
1753 } | |
1754 super = super->klass_part()->super(); | |
1755 } | |
1756 return false; | |
1757 } | |
1758 | |
1759 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs, | |
1760 StackMapFrame* current_frame, | |
1761 constantPoolHandle cp, | |
1762 TRAPS) { | |
1565 | 1763 u2 index = bcs->get_index_u2(); |
0 | 1764 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this)); |
1765 | |
1766 // Get field name and signature | |
2177
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diff
changeset
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1767 Symbol* field_name = cp->name_ref_at(index); |
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diff
changeset
|
1768 Symbol* field_sig = cp->signature_ref_at(index); |
0 | 1769 |
1770 if (!SignatureVerifier::is_valid_type_signature(field_sig)) { | |
1771 class_format_error( | |
1772 "Invalid signature for field in class %s referenced " | |
1773 "from constant pool index %d", _klass->external_name(), index); | |
1774 return; | |
1775 } | |
1776 | |
1777 // Get referenced class type | |
1778 VerificationType ref_class_type = cp_ref_index_to_type( | |
1779 index, cp, CHECK_VERIFY(this)); | |
1780 if (!ref_class_type.is_object()) { | |
1781 verify_error( | |
1782 "Expecting reference to class in class %s at constant pool index %d", | |
1783 _klass->external_name(), index); | |
1784 return; | |
1785 } | |
1786 VerificationType target_class_type = ref_class_type; | |
1787 | |
1788 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1789 "buffer type must match VerificationType size"); | |
1790 uintptr_t field_type_buffer[2]; | |
1791 VerificationType* field_type = (VerificationType*)field_type_buffer; | |
1792 // If we make a VerificationType[2] array directly, the compiler calls | |
1793 // to the c-runtime library to do the allocation instead of just | |
1794 // stack allocating it. Plus it would run constructors. This shows up | |
1795 // in performance profiles. | |
1796 | |
1797 SignatureStream sig_stream(field_sig, false); | |
1798 VerificationType stack_object_type; | |
1799 int n = change_sig_to_verificationType( | |
1800 &sig_stream, field_type, CHECK_VERIFY(this)); | |
1801 u2 bci = bcs->bci(); | |
1802 bool is_assignable; | |
1565 | 1803 switch (bcs->raw_code()) { |
0 | 1804 case Bytecodes::_getstatic: { |
1805 for (int i = 0; i < n; i++) { | |
1806 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1807 } | |
1808 break; | |
1809 } | |
1810 case Bytecodes::_putstatic: { | |
1811 for (int i = n - 1; i >= 0; i--) { | |
1812 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1813 } | |
1814 break; | |
1815 } | |
1816 case Bytecodes::_getfield: { | |
1817 stack_object_type = current_frame->pop_stack( | |
1818 target_class_type, CHECK_VERIFY(this)); | |
1819 for (int i = 0; i < n; i++) { | |
1820 current_frame->push_stack(field_type[i], CHECK_VERIFY(this)); | |
1821 } | |
1822 goto check_protected; | |
1823 } | |
1824 case Bytecodes::_putfield: { | |
1825 for (int i = n - 1; i >= 0; i--) { | |
1826 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this)); | |
1827 } | |
1828 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this)); | |
1829 | |
1830 // The JVMS 2nd edition allows field initialization before the superclass | |
1831 // initializer, if the field is defined within the current class. | |
1832 fieldDescriptor fd; | |
1833 if (stack_object_type == VerificationType::uninitialized_this_type() && | |
1834 target_class_type.equals(current_type()) && | |
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diff
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1835 _klass->find_local_field(field_name, field_sig, &fd)) { |
0 | 1836 stack_object_type = current_type(); |
1837 } | |
1838 is_assignable = target_class_type.is_assignable_from( | |
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1839 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 1840 if (!is_assignable) { |
1841 verify_error(bci, "Bad type on operand stack in putfield"); | |
1842 return; | |
1843 } | |
1844 } | |
1845 check_protected: { | |
1846 if (_this_type == stack_object_type) | |
1847 break; // stack_object_type must be assignable to _current_class_type | |
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1848 Symbol* ref_class_name = |
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1849 cp->klass_name_at(cp->klass_ref_index_at(index)); |
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1850 if (!name_in_supers(ref_class_name, current_class())) |
0 | 1851 // stack_object_type must be assignable to _current_class_type since: |
1852 // 1. stack_object_type must be assignable to ref_class. | |
1853 // 2. ref_class must be _current_class or a subclass of it. It can't | |
1854 // be a superclass of it. See revised JVMS 5.4.4. | |
1855 break; | |
1856 | |
1857 klassOop ref_class_oop = load_class(ref_class_name, CHECK); | |
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1858 if (is_protected_access(current_class(), ref_class_oop, field_name, |
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1859 field_sig, false)) { |
0 | 1860 // It's protected access, check if stack object is assignable to |
1861 // current class. | |
1862 is_assignable = current_type().is_assignable_from( | |
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1863 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 1864 if (!is_assignable) { |
1865 verify_error(bci, "Bad access to protected data in getfield"); | |
1866 return; | |
1867 } | |
1868 } | |
1869 break; | |
1870 } | |
1871 default: ShouldNotReachHere(); | |
1872 } | |
1873 } | |
1874 | |
1875 void ClassVerifier::verify_invoke_init( | |
1876 RawBytecodeStream* bcs, VerificationType ref_class_type, | |
1877 StackMapFrame* current_frame, u4 code_length, bool *this_uninit, | |
1878 constantPoolHandle cp, TRAPS) { | |
1879 u2 bci = bcs->bci(); | |
1880 VerificationType type = current_frame->pop_stack( | |
1881 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
1882 if (type == VerificationType::uninitialized_this_type()) { | |
1883 // The method must be an <init> method of either this class, or one of its | |
1884 // superclasses | |
1677 | 1885 if (ref_class_type.name() != current_class()->name() && |
1886 !name_in_supers(ref_class_type.name(), current_class())) { | |
0 | 1887 verify_error(bci, "Bad <init> method call"); |
1888 return; | |
1889 } | |
1890 current_frame->initialize_object(type, current_type()); | |
1891 *this_uninit = true; | |
1892 } else if (type.is_uninitialized()) { | |
1893 u2 new_offset = type.bci(); | |
1894 address new_bcp = bcs->bcp() - bci + new_offset; | |
1895 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) { | |
1896 verify_error(new_offset, "Expecting new instruction"); | |
1897 return; | |
1898 } | |
1899 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1); | |
1900 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this)); | |
1901 | |
1902 // The method must be an <init> method of the indicated class | |
1903 VerificationType new_class_type = cp_index_to_type( | |
1904 new_class_index, cp, CHECK_VERIFY(this)); | |
1905 if (!new_class_type.equals(ref_class_type)) { | |
1906 verify_error(bci, "Call to wrong <init> method"); | |
1907 return; | |
1908 } | |
1909 // According to the VM spec, if the referent class is a superclass of the | |
1910 // current class, and is in a different runtime package, and the method is | |
1911 // protected, then the objectref must be the current class or a subclass | |
1912 // of the current class. | |
1913 VerificationType objectref_type = new_class_type; | |
1914 if (name_in_supers(ref_class_type.name(), current_class())) { | |
1915 klassOop ref_klass = load_class( | |
1916 ref_class_type.name(), CHECK_VERIFY(this)); | |
1917 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method( | |
1918 vmSymbols::object_initializer_name(), | |
1565 | 1919 cp->signature_ref_at(bcs->get_index_u2())); |
0 | 1920 instanceKlassHandle mh(THREAD, m->method_holder()); |
1921 if (m->is_protected() && !mh->is_same_class_package(_klass())) { | |
1922 bool assignable = current_type().is_assignable_from( | |
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1923 objectref_type, this, CHECK_VERIFY(this)); |
0 | 1924 if (!assignable) { |
1925 verify_error(bci, "Bad access to protected <init> method"); | |
1926 return; | |
1927 } | |
1928 } | |
1929 } | |
1930 current_frame->initialize_object(type, new_class_type); | |
1931 } else { | |
1932 verify_error(bci, "Bad operand type when invoking <init>"); | |
1933 return; | |
1934 } | |
1935 } | |
1936 | |
1937 void ClassVerifier::verify_invoke_instructions( | |
1938 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, | |
1939 bool *this_uninit, VerificationType return_type, | |
1940 constantPoolHandle cp, TRAPS) { | |
1941 // Make sure the constant pool item is the right type | |
1565 | 1942 u2 index = bcs->get_index_u2(); |
1943 Bytecodes::Code opcode = bcs->raw_code(); | |
0 | 1944 unsigned int types = (opcode == Bytecodes::_invokeinterface |
1945 ? 1 << JVM_CONSTANT_InterfaceMethodref | |
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1946 : opcode == Bytecodes::_invokedynamic |
2460 | 1947 ? 1 << JVM_CONSTANT_InvokeDynamic |
0 | 1948 : 1 << JVM_CONSTANT_Methodref); |
1949 verify_cp_type(index, cp, types, CHECK_VERIFY(this)); | |
1950 | |
1951 // Get method name and signature | |
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1952 Symbol* method_name = cp->name_ref_at(index); |
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1953 Symbol* method_sig = cp->signature_ref_at(index); |
0 | 1954 |
1955 if (!SignatureVerifier::is_valid_method_signature(method_sig)) { | |
1956 class_format_error( | |
1957 "Invalid method signature in class %s referenced " | |
1958 "from constant pool index %d", _klass->external_name(), index); | |
1959 return; | |
1960 } | |
1961 | |
1962 // Get referenced class type | |
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1963 VerificationType ref_class_type; |
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1964 if (opcode == Bytecodes::_invokedynamic) { |
1602 | 1965 if (!EnableInvokeDynamic || |
1966 _klass->major_version() < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
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1967 class_format_error( |
1602 | 1968 (!EnableInvokeDynamic ? |
1969 "invokedynamic instructions not enabled in this JVM" : | |
1970 "invokedynamic instructions not supported by this class file version"), | |
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1971 _klass->external_name()); |
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1972 return; |
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1973 } |
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1974 } else { |
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1975 ref_class_type = cp_ref_index_to_type(index, cp, CHECK_VERIFY(this)); |
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1976 } |
0 | 1977 |
1978 // For a small signature length, we just allocate 128 bytes instead | |
1979 // of parsing the signature once to find its size. | |
1980 // -3 is for '(', ')' and return descriptor; multiply by 2 is for | |
1981 // longs/doubles to be consertive. | |
1982 assert(sizeof(VerificationType) == sizeof(uintptr_t), | |
1983 "buffer type must match VerificationType size"); | |
1984 uintptr_t on_stack_sig_types_buffer[128]; | |
1985 // If we make a VerificationType[128] array directly, the compiler calls | |
1986 // to the c-runtime library to do the allocation instead of just | |
1987 // stack allocating it. Plus it would run constructors. This shows up | |
1988 // in performance profiles. | |
1989 | |
1990 VerificationType* sig_types; | |
1991 int size = (method_sig->utf8_length() - 3) * 2; | |
1992 if (size > 128) { | |
1993 // Long and double occupies two slots here. | |
1994 ArgumentSizeComputer size_it(method_sig); | |
1995 size = size_it.size(); | |
1996 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size); | |
1997 } else{ | |
1998 sig_types = (VerificationType*)on_stack_sig_types_buffer; | |
1999 } | |
2000 SignatureStream sig_stream(method_sig); | |
2001 int sig_i = 0; | |
2002 while (!sig_stream.at_return_type()) { | |
2003 sig_i += change_sig_to_verificationType( | |
2004 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this)); | |
2005 sig_stream.next(); | |
2006 } | |
2007 int nargs = sig_i; | |
2008 | |
2009 #ifdef ASSERT | |
2010 { | |
2011 ArgumentSizeComputer size_it(method_sig); | |
2012 assert(nargs == size_it.size(), "Argument sizes do not match"); | |
2013 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough"); | |
2014 } | |
2015 #endif | |
2016 | |
2017 // Check instruction operands | |
2018 u2 bci = bcs->bci(); | |
2019 if (opcode == Bytecodes::_invokeinterface) { | |
2020 address bcp = bcs->bcp(); | |
2021 // 4905268: count operand in invokeinterface should be nargs+1, not nargs. | |
2022 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is | |
2023 // the difference between the size of the operand stack before and after the instruction | |
2024 // executes. | |
2025 if (*(bcp+3) != (nargs+1)) { | |
2026 verify_error(bci, "Inconsistent args count operand in invokeinterface"); | |
2027 return; | |
2028 } | |
2029 if (*(bcp+4) != 0) { | |
2030 verify_error(bci, "Fourth operand byte of invokeinterface must be zero"); | |
2031 return; | |
2032 } | |
2033 } | |
2034 | |
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2035 if (opcode == Bytecodes::_invokedynamic) { |
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2036 address bcp = bcs->bcp(); |
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2037 if (*(bcp+3) != 0 || *(bcp+4) != 0) { |
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2038 verify_error(bci, "Third and fourth operand bytes of invokedynamic must be zero"); |
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2039 return; |
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2040 } |
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2041 } |
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2042 |
0 | 2043 if (method_name->byte_at(0) == '<') { |
2044 // Make sure <init> can only be invoked by invokespecial | |
2045 if (opcode != Bytecodes::_invokespecial || | |
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2046 method_name != vmSymbols::object_initializer_name()) { |
0 | 2047 verify_error(bci, "Illegal call to internal method"); |
2048 return; | |
2049 } | |
2050 } else if (opcode == Bytecodes::_invokespecial | |
2051 && !ref_class_type.equals(current_type()) | |
2052 && !ref_class_type.equals(VerificationType::reference_type( | |
2053 current_class()->super()->klass_part()->name()))) { | |
2054 bool subtype = ref_class_type.is_assignable_from( | |
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2055 current_type(), this, CHECK_VERIFY(this)); |
0 | 2056 if (!subtype) { |
2057 verify_error(bci, "Bad invokespecial instruction: " | |
2058 "current class isn't assignable to reference class."); | |
2059 return; | |
2060 } | |
2061 } | |
2062 // Match method descriptor with operand stack | |
2063 for (int i = nargs - 1; i >= 0; i--) { // Run backwards | |
2064 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this)); | |
2065 } | |
2066 // Check objectref on operand stack | |
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2067 if (opcode != Bytecodes::_invokestatic && |
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2068 opcode != Bytecodes::_invokedynamic) { |
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2069 if (method_name == vmSymbols::object_initializer_name()) { // <init> method |
0 | 2070 verify_invoke_init(bcs, ref_class_type, current_frame, |
2071 code_length, this_uninit, cp, CHECK_VERIFY(this)); | |
2072 } else { // other methods | |
2073 // Ensures that target class is assignable to method class. | |
2074 if (opcode == Bytecodes::_invokespecial) { | |
2075 current_frame->pop_stack(current_type(), CHECK_VERIFY(this)); | |
2076 } else if (opcode == Bytecodes::_invokevirtual) { | |
2077 VerificationType stack_object_type = | |
2078 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2079 if (current_type() != stack_object_type) { | |
2080 assert(cp->cache() == NULL, "not rewritten yet"); | |
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2081 Symbol* ref_class_name = |
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2082 cp->klass_name_at(cp->klass_ref_index_at(index)); |
0 | 2083 // See the comments in verify_field_instructions() for |
2084 // the rationale behind this. | |
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2085 if (name_in_supers(ref_class_name, current_class())) { |
0 | 2086 klassOop ref_class = load_class(ref_class_name, CHECK); |
2087 if (is_protected_access( | |
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2088 _klass, ref_class, method_name, method_sig, true)) { |
0 | 2089 // It's protected access, check if stack object is |
2090 // assignable to current class. | |
2091 bool is_assignable = current_type().is_assignable_from( | |
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2092 stack_object_type, this, CHECK_VERIFY(this)); |
0 | 2093 if (!is_assignable) { |
2094 if (ref_class_type.name() == vmSymbols::java_lang_Object() | |
2095 && stack_object_type.is_array() | |
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2096 && method_name == vmSymbols::clone_name()) { |
0 | 2097 // Special case: arrays pretend to implement public Object |
2098 // clone(). | |
2099 } else { | |
2100 verify_error(bci, | |
2101 "Bad access to protected data in invokevirtual"); | |
2102 return; | |
2103 } | |
2104 } | |
2105 } | |
2106 } | |
2107 } | |
2108 } else { | |
2109 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered"); | |
2110 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this)); | |
2111 } | |
2112 } | |
2113 } | |
2114 // Push the result type. | |
2115 if (sig_stream.type() != T_VOID) { | |
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2116 if (method_name == vmSymbols::object_initializer_name()) { |
0 | 2117 // <init> method must have a void return type |
2118 verify_error(bci, "Return type must be void in <init> method"); | |
2119 return; | |
2120 } | |
2121 VerificationType return_type[2]; | |
2122 int n = change_sig_to_verificationType( | |
2123 &sig_stream, return_type, CHECK_VERIFY(this)); | |
2124 for (int i = 0; i < n; i++) { | |
2125 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards | |
2126 } | |
2127 } | |
2128 } | |
2129 | |
2130 VerificationType ClassVerifier::get_newarray_type( | |
2131 u2 index, u2 bci, TRAPS) { | |
2132 const char* from_bt[] = { | |
2133 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J", | |
2134 }; | |
2135 if (index < T_BOOLEAN || index > T_LONG) { | |
2136 verify_error(bci, "Illegal newarray instruction"); | |
2137 return VerificationType::bogus_type(); | |
2138 } | |
2139 | |
2140 // from_bt[index] contains the array signature which has a length of 2 | |
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2141 Symbol* sig = create_temporary_symbol( |
0 | 2142 from_bt[index], 2, CHECK_(VerificationType::bogus_type())); |
2143 return VerificationType::reference_type(sig); | |
2144 } | |
2145 | |
2146 void ClassVerifier::verify_anewarray( | |
2147 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) { | |
2148 verify_cp_class_type(index, cp, CHECK_VERIFY(this)); | |
2149 current_frame->pop_stack( | |
2150 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2151 | |
2152 VerificationType component_type = | |
2153 cp_index_to_type(index, cp, CHECK_VERIFY(this)); | |
2154 int length; | |
2155 char* arr_sig_str; | |
2156 if (component_type.is_array()) { // it's an array | |
2157 const char* component_name = component_type.name()->as_utf8(); | |
2158 // add one dimension to component | |
2159 length = (int)strlen(component_name) + 1; | |
2160 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2161 arr_sig_str[0] = '['; | |
2162 strncpy(&arr_sig_str[1], component_name, length - 1); | |
2163 } else { // it's an object or interface | |
2164 const char* component_name = component_type.name()->as_utf8(); | |
2165 // add one dimension to component with 'L' prepended and ';' postpended. | |
2166 length = (int)strlen(component_name) + 3; | |
2167 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length); | |
2168 arr_sig_str[0] = '['; | |
2169 arr_sig_str[1] = 'L'; | |
2170 strncpy(&arr_sig_str[2], component_name, length - 2); | |
2171 arr_sig_str[length - 1] = ';'; | |
2172 } | |
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2173 Symbol* arr_sig = create_temporary_symbol( |
0 | 2174 arr_sig_str, length, CHECK_VERIFY(this)); |
2175 VerificationType new_array_type = VerificationType::reference_type(arr_sig); | |
2176 current_frame->push_stack(new_array_type, CHECK_VERIFY(this)); | |
2177 } | |
2178 | |
2179 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2180 current_frame->get_local( | |
2181 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2182 current_frame->push_stack( | |
2183 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2184 } | |
2185 | |
2186 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2187 current_frame->get_local_2( | |
2188 index, VerificationType::long_type(), | |
2189 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2190 current_frame->push_stack_2( | |
2191 VerificationType::long_type(), | |
2192 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2193 } | |
2194 | |
2195 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2196 current_frame->get_local( | |
2197 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2198 current_frame->push_stack( | |
2199 VerificationType::float_type(), CHECK_VERIFY(this)); | |
2200 } | |
2201 | |
2202 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2203 current_frame->get_local_2( | |
2204 index, VerificationType::double_type(), | |
2205 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2206 current_frame->push_stack_2( | |
2207 VerificationType::double_type(), | |
2208 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2209 } | |
2210 | |
2211 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2212 VerificationType type = current_frame->get_local( | |
2213 index, VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2214 current_frame->push_stack(type, CHECK_VERIFY(this)); | |
2215 } | |
2216 | |
2217 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2218 current_frame->pop_stack( | |
2219 VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2220 current_frame->set_local( | |
2221 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2222 } | |
2223 | |
2224 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2225 current_frame->pop_stack_2( | |
2226 VerificationType::long2_type(), | |
2227 VerificationType::long_type(), CHECK_VERIFY(this)); | |
2228 current_frame->set_local_2( | |
2229 index, VerificationType::long_type(), | |
2230 VerificationType::long2_type(), CHECK_VERIFY(this)); | |
2231 } | |
2232 | |
2233 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2234 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this)); | |
2235 current_frame->set_local( | |
2236 index, VerificationType::float_type(), CHECK_VERIFY(this)); | |
2237 } | |
2238 | |
2239 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2240 current_frame->pop_stack_2( | |
2241 VerificationType::double2_type(), | |
2242 VerificationType::double_type(), CHECK_VERIFY(this)); | |
2243 current_frame->set_local_2( | |
2244 index, VerificationType::double_type(), | |
2245 VerificationType::double2_type(), CHECK_VERIFY(this)); | |
2246 } | |
2247 | |
2248 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2249 VerificationType type = current_frame->pop_stack( | |
2250 VerificationType::reference_check(), CHECK_VERIFY(this)); | |
2251 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2252 } | |
2253 | |
2254 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) { | |
2255 VerificationType type = current_frame->get_local( | |
2256 index, VerificationType::integer_type(), CHECK_VERIFY(this)); | |
2257 current_frame->set_local(index, type, CHECK_VERIFY(this)); | |
2258 } | |
2259 | |
2260 void ClassVerifier::verify_return_value( | |
2261 VerificationType return_type, VerificationType type, u2 bci, TRAPS) { | |
2262 if (return_type == VerificationType::bogus_type()) { | |
2263 verify_error(bci, "Method expects a return value"); | |
2264 return; | |
2265 } | |
2177
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2266 bool match = return_type.is_assignable_from(type, this, CHECK_VERIFY(this)); |
0 | 2267 if (!match) { |
2268 verify_error(bci, "Bad return type"); | |
2269 return; | |
2270 } | |
2271 } | |
2177
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2272 |
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2273 // The verifier creates symbols which are substrings of Symbols. |
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2274 // These are stored in the verifier until the end of verification so that |
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2275 // they can be reference counted. |
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2276 Symbol* ClassVerifier::create_temporary_symbol(const Symbol *s, int begin, |
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2277 int end, TRAPS) { |
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2278 Symbol* sym = SymbolTable::new_symbol(s, begin, end, CHECK_NULL); |
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2279 _symbols->push(sym); |
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2280 return sym; |
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2281 } |
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2282 |
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2283 Symbol* ClassVerifier::create_temporary_symbol(const char *s, int length, TRAPS) { |
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2284 Symbol* sym = SymbolTable::new_symbol(s, length, CHECK_NULL); |
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2285 _symbols->push(sym); |
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2286 return sym; |
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2287 } |