0
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1 /*
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2 * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_verifier.cpp.incl"
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27
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28 // Access to external entry for VerifyClassCodes - old byte code verifier
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29
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30 extern "C" {
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31 typedef jboolean (*verify_byte_codes_fn_t)(JNIEnv *, jclass, char *, jint);
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32 typedef jboolean (*verify_byte_codes_fn_new_t)(JNIEnv *, jclass, char *, jint, jint);
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33 }
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34
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35 static void* volatile _verify_byte_codes_fn = NULL;
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36
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37 static volatile jint _is_new_verify_byte_codes_fn = (jint) true;
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38
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39 static void* verify_byte_codes_fn() {
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40 if (_verify_byte_codes_fn == NULL) {
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41 void *lib_handle = os::native_java_library();
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42 void *func = hpi::dll_lookup(lib_handle, "VerifyClassCodesForMajorVersion");
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43 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func);
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44 if (func == NULL) {
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45 OrderAccess::release_store(&_is_new_verify_byte_codes_fn, false);
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46 func = hpi::dll_lookup(lib_handle, "VerifyClassCodes");
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47 OrderAccess::release_store_ptr(&_verify_byte_codes_fn, func);
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48 }
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49 }
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50 return (void*)_verify_byte_codes_fn;
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51 }
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52
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53
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54 // Methods in Verifier
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55
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56 bool Verifier::should_verify_for(oop class_loader) {
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57 return class_loader == NULL ?
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58 BytecodeVerificationLocal : BytecodeVerificationRemote;
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59 }
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60
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61 bool Verifier::relax_verify_for(oop loader) {
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62 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
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63 bool need_verify =
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64 // verifyAll
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65 (BytecodeVerificationLocal && BytecodeVerificationRemote) ||
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66 // verifyRemote
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67 (!BytecodeVerificationLocal && BytecodeVerificationRemote && !trusted);
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68 return !need_verify;
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69 }
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70
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71 bool Verifier::verify(instanceKlassHandle klass, Verifier::Mode mode, TRAPS) {
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72 ResourceMark rm(THREAD);
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73 HandleMark hm;
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74
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75 symbolHandle exception_name;
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76 const size_t message_buffer_len = klass->name()->utf8_length() + 1024;
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77 char* message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len);
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78
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79 const char* klassName = klass->external_name();
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80
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81 // If the class should be verified, first see if we can use the split
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82 // verifier. If not, or if verification fails and FailOverToOldVerifier
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83 // is set, then call the inference verifier.
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84 if (is_eligible_for_verification(klass)) {
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85 if (TraceClassInitialization) {
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86 tty->print_cr("Start class verification for: %s", klassName);
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87 }
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88 if (UseSplitVerifier &&
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89 klass->major_version() >= STACKMAP_ATTRIBUTE_MAJOR_VERSION) {
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90 ClassVerifier split_verifier(
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91 klass, message_buffer, message_buffer_len, THREAD);
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92 split_verifier.verify_class(THREAD);
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93 exception_name = split_verifier.result();
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94 if (FailOverToOldVerifier && !HAS_PENDING_EXCEPTION &&
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95 (exception_name == vmSymbols::java_lang_VerifyError() ||
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96 exception_name == vmSymbols::java_lang_ClassFormatError())) {
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97 if (TraceClassInitialization) {
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98 tty->print_cr(
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99 "Fail over class verification to old verifier for: %s", klassName);
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100 }
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101 exception_name = inference_verify(
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102 klass, message_buffer, message_buffer_len, THREAD);
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103 }
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104 } else {
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105 exception_name = inference_verify(
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106 klass, message_buffer, message_buffer_len, THREAD);
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107 }
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108
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109 if (TraceClassInitialization) {
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110 if (HAS_PENDING_EXCEPTION) {
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111 tty->print("Verification for %s has", klassName);
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112 tty->print_cr(" exception pending %s ",
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113 instanceKlass::cast(PENDING_EXCEPTION->klass())->external_name());
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114 } else if (!exception_name.is_null()) {
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115 tty->print_cr("Verification for %s failed", klassName);
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116 }
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117 tty->print_cr("End class verification for: %s", klassName);
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118 }
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119 }
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120
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121 if (HAS_PENDING_EXCEPTION) {
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122 return false; // use the existing exception
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123 } else if (exception_name.is_null()) {
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124 return true; // verifcation succeeded
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125 } else { // VerifyError or ClassFormatError to be created and thrown
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126 ResourceMark rm(THREAD);
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127 instanceKlassHandle kls =
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128 SystemDictionary::resolve_or_fail(exception_name, true, CHECK_false);
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129 while (!kls.is_null()) {
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130 if (kls == klass) {
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131 // If the class being verified is the exception we're creating
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132 // or one of it's superclasses, we're in trouble and are going
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133 // to infinitely recurse when we try to initialize the exception.
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134 // So bail out here by throwing the preallocated VM error.
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135 THROW_OOP_(Universe::virtual_machine_error_instance(), false);
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136 }
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137 kls = kls->super();
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138 }
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139 message_buffer[message_buffer_len - 1] = '\0'; // just to be sure
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140 THROW_MSG_(exception_name, message_buffer, false);
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141 }
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142 }
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143
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144 bool Verifier::is_eligible_for_verification(instanceKlassHandle klass) {
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145 symbolOop name = klass->name();
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146 klassOop refl_magic_klass = SystemDictionary::reflect_magic_klass();
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147
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148 return (should_verify_for(klass->class_loader()) &&
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149 // return if the class is a bootstrapping class
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150 // We need to skip the following four for bootstraping
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151 name != vmSymbols::java_lang_Object() &&
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152 name != vmSymbols::java_lang_Class() &&
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153 name != vmSymbols::java_lang_String() &&
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154 name != vmSymbols::java_lang_Throwable() &&
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155
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156 // Can not verify the bytecodes for shared classes because they have
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157 // already been rewritten to contain constant pool cache indices,
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158 // which the verifier can't understand.
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159 // Shared classes shouldn't have stackmaps either.
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160 !klass()->is_shared() &&
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161
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162 // As of the fix for 4486457 we disable verification for all of the
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163 // dynamically-generated bytecodes associated with the 1.4
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164 // reflection implementation, not just those associated with
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165 // sun/reflect/SerializationConstructorAccessor.
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166 // NOTE: this is called too early in the bootstrapping process to be
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167 // guarded by Universe::is_gte_jdk14x_version()/UseNewReflection.
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168 (refl_magic_klass == NULL ||
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169 !klass->is_subtype_of(refl_magic_klass) ||
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170 VerifyReflectionBytecodes)
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171 );
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172 }
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173
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174 symbolHandle Verifier::inference_verify(
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175 instanceKlassHandle klass, char* message, size_t message_len, TRAPS) {
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176 JavaThread* thread = (JavaThread*)THREAD;
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177 JNIEnv *env = thread->jni_environment();
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178
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179 void* verify_func = verify_byte_codes_fn();
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180
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181 if (verify_func == NULL) {
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182 jio_snprintf(message, message_len, "Could not link verifier");
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183 return vmSymbols::java_lang_VerifyError();
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184 }
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185
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186 ResourceMark rm(THREAD);
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187 if (ClassVerifier::_verify_verbose) {
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188 tty->print_cr("Verifying class %s with old format", klass->external_name());
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189 }
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190
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191 jclass cls = (jclass) JNIHandles::make_local(env, klass->java_mirror());
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192 jint result;
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193
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194 {
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195 HandleMark hm(thread);
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196 ThreadToNativeFromVM ttn(thread);
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197 // ThreadToNativeFromVM takes care of changing thread_state, so safepoint
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198 // code knows that we have left the VM
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199
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200 if (_is_new_verify_byte_codes_fn) {
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201 verify_byte_codes_fn_new_t func =
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202 CAST_TO_FN_PTR(verify_byte_codes_fn_new_t, verify_func);
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203 result = (*func)(env, cls, message, (int)message_len,
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204 klass->major_version());
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205 } else {
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206 verify_byte_codes_fn_t func =
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207 CAST_TO_FN_PTR(verify_byte_codes_fn_t, verify_func);
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208 result = (*func)(env, cls, message, (int)message_len);
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209 }
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210 }
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211
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212 JNIHandles::destroy_local(cls);
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213
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214 // These numbers are chosen so that VerifyClassCodes interface doesn't need
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215 // to be changed (still return jboolean (unsigned char)), and result is
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216 // 1 when verification is passed.
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217 symbolHandle nh(NULL);
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218 if (result == 0) {
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219 return vmSymbols::java_lang_VerifyError();
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220 } else if (result == 1) {
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221 return nh; // verified.
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222 } else if (result == 2) {
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223 THROW_MSG_(vmSymbols::java_lang_OutOfMemoryError(), message, nh);
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224 } else if (result == 3) {
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225 return vmSymbols::java_lang_ClassFormatError();
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226 } else {
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227 ShouldNotReachHere();
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228 return nh;
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229 }
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230 }
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231
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232 // Methods in ClassVerifier
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233
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234 bool ClassVerifier::_verify_verbose = false;
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235
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236 ClassVerifier::ClassVerifier(
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237 instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS)
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238 : _thread(THREAD), _exception_type(symbolHandle()), _message(msg),
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239 _message_buffer_len(msg_len), _klass(klass) {
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240 _this_type = VerificationType::reference_type(klass->name());
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241 }
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242
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243 ClassVerifier::~ClassVerifier() {
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244 }
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245
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246 void ClassVerifier::verify_class(TRAPS) {
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247 if (_verify_verbose) {
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248 tty->print_cr("Verifying class %s with new format",
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249 _klass->external_name());
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250 }
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251
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252 objArrayHandle methods(THREAD, _klass->methods());
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253 int num_methods = methods->length();
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254
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255 for (int index = 0; index < num_methods; index++) {
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256 methodOop m = (methodOop)methods->obj_at(index);
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257 if (m->is_native() || m->is_abstract()) {
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258 // If m is native or abstract, skip it. It is checked in class file
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259 // parser that methods do not override a final method.
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260 continue;
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261 }
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262 verify_method(methodHandle(THREAD, m), CHECK_VERIFY(this));
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263 }
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264 }
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265
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266 void ClassVerifier::verify_method(methodHandle m, TRAPS) {
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267 ResourceMark rm(THREAD);
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268 _method = m; // initialize _method
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269 if (_verify_verbose) {
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270 tty->print_cr("Verifying method %s", m->name_and_sig_as_C_string());
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271 }
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272
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273 const char* bad_type_msg = "Bad type on operand stack in %s";
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274
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275 int32_t max_stack = m->max_stack();
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276 int32_t max_locals = m->max_locals();
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277 constantPoolHandle cp(THREAD, m->constants());
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278
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279 if (!SignatureVerifier::is_valid_method_signature(m->signature())) {
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280 class_format_error("Invalid method signature");
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281 return;
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282 }
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283
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284 // Initial stack map frame: offset is 0, stack is initially empty.
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285 StackMapFrame current_frame(max_locals, max_stack, this);
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286 // Set initial locals
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287 VerificationType return_type = current_frame.set_locals_from_arg(
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288 m, current_type(), CHECK_VERIFY(this));
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289
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290 int32_t stackmap_index = 0; // index to the stackmap array
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291
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292 u4 code_length = m->code_size();
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293
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294 // Scan the bytecode and map each instruction's start offset to a number.
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295 char* code_data = generate_code_data(m, code_length, CHECK_VERIFY(this));
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296
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297 int ex_min = code_length;
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298 int ex_max = -1;
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299 // Look through each item on the exception table. Each of the fields must refer
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300 // to a legal instruction.
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301 verify_exception_handler_table(
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302 code_length, code_data, ex_min, ex_max, CHECK_VERIFY(this));
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303
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304 // Look through each entry on the local variable table and make sure
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305 // its range of code array offsets is valid. (4169817)
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306 if (m->has_localvariable_table()) {
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307 verify_local_variable_table(code_length, code_data, CHECK_VERIFY(this));
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308 }
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309
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310 typeArrayHandle stackmap_data(THREAD, m->stackmap_data());
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311 StackMapStream stream(stackmap_data);
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312 StackMapReader reader(this, &stream, code_data, code_length, THREAD);
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313 StackMapTable stackmap_table(&reader, ¤t_frame, max_locals, max_stack,
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314 code_data, code_length, CHECK_VERIFY(this));
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315
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316 if (_verify_verbose) {
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317 stackmap_table.print();
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318 }
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319
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320 RawBytecodeStream bcs(m);
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321
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322 // Scan the byte code linearly from the start to the end
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323 bool no_control_flow = false; // Set to true when there is no direct control
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324 // flow from current instruction to the next
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325 // instruction in sequence
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326 Bytecodes::Code opcode;
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327 while (!bcs.is_last_bytecode()) {
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328 opcode = bcs.raw_next();
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329 u2 bci = bcs.bci();
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330
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331 // Set current frame's offset to bci
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332 current_frame.set_offset(bci);
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333
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334 // Make sure every offset in stackmap table point to the beginning to
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335 // an instruction. Match current_frame to stackmap_table entry with
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336 // the same offset if exists.
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337 stackmap_index = verify_stackmap_table(
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338 stackmap_index, bci, ¤t_frame, &stackmap_table,
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339 no_control_flow, CHECK_VERIFY(this));
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340
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341 bool this_uninit = false; // Set to true when invokespecial <init> initialized 'this'
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342
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343 // Merge with the next instruction
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344 {
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345 u2 index;
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346 int target;
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347 VerificationType type, type2;
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348 VerificationType atype;
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349
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350 #ifndef PRODUCT
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351 if (_verify_verbose) {
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352 current_frame.print();
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353 tty->print_cr("offset = %d, opcode = %s", bci, Bytecodes::name(opcode));
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354 }
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355 #endif
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356
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357 // Make sure wide instruction is in correct format
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358 if (bcs.is_wide()) {
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359 if (opcode != Bytecodes::_iinc && opcode != Bytecodes::_iload &&
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360 opcode != Bytecodes::_aload && opcode != Bytecodes::_lload &&
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361 opcode != Bytecodes::_istore && opcode != Bytecodes::_astore &&
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362 opcode != Bytecodes::_lstore && opcode != Bytecodes::_fload &&
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363 opcode != Bytecodes::_dload && opcode != Bytecodes::_fstore &&
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364 opcode != Bytecodes::_dstore) {
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365 verify_error(bci, "Bad wide instruction");
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366 return;
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367 }
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368 }
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369
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370 switch (opcode) {
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371 case Bytecodes::_nop :
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372 no_control_flow = false; break;
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373 case Bytecodes::_aconst_null :
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374 current_frame.push_stack(
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375 VerificationType::null_type(), CHECK_VERIFY(this));
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376 no_control_flow = false; break;
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377 case Bytecodes::_iconst_m1 :
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378 case Bytecodes::_iconst_0 :
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379 case Bytecodes::_iconst_1 :
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380 case Bytecodes::_iconst_2 :
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381 case Bytecodes::_iconst_3 :
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382 case Bytecodes::_iconst_4 :
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383 case Bytecodes::_iconst_5 :
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384 current_frame.push_stack(
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385 VerificationType::integer_type(), CHECK_VERIFY(this));
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386 no_control_flow = false; break;
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387 case Bytecodes::_lconst_0 :
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388 case Bytecodes::_lconst_1 :
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389 current_frame.push_stack_2(
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390 VerificationType::long_type(),
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391 VerificationType::long2_type(), CHECK_VERIFY(this));
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392 no_control_flow = false; break;
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393 case Bytecodes::_fconst_0 :
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394 case Bytecodes::_fconst_1 :
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395 case Bytecodes::_fconst_2 :
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396 current_frame.push_stack(
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397 VerificationType::float_type(), CHECK_VERIFY(this));
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398 no_control_flow = false; break;
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399 case Bytecodes::_dconst_0 :
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400 case Bytecodes::_dconst_1 :
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401 current_frame.push_stack_2(
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402 VerificationType::double_type(),
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403 VerificationType::double2_type(), CHECK_VERIFY(this));
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404 no_control_flow = false; break;
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405 case Bytecodes::_sipush :
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406 case Bytecodes::_bipush :
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407 current_frame.push_stack(
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408 VerificationType::integer_type(), CHECK_VERIFY(this));
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409 no_control_flow = false; break;
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410 case Bytecodes::_ldc :
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411 verify_ldc(
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412 opcode, bcs.get_index(), ¤t_frame,
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413 cp, bci, CHECK_VERIFY(this));
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414 no_control_flow = false; break;
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415 case Bytecodes::_ldc_w :
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416 case Bytecodes::_ldc2_w :
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417 verify_ldc(
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418 opcode, bcs.get_index_big(), ¤t_frame,
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419 cp, bci, CHECK_VERIFY(this));
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420 no_control_flow = false; break;
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421 case Bytecodes::_iload :
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422 verify_iload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
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423 no_control_flow = false; break;
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424 case Bytecodes::_iload_0 :
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425 case Bytecodes::_iload_1 :
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426 case Bytecodes::_iload_2 :
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427 case Bytecodes::_iload_3 :
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428 index = opcode - Bytecodes::_iload_0;
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429 verify_iload(index, ¤t_frame, CHECK_VERIFY(this));
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430 no_control_flow = false; break;
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431 case Bytecodes::_lload :
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432 verify_lload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
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433 no_control_flow = false; break;
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434 case Bytecodes::_lload_0 :
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435 case Bytecodes::_lload_1 :
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436 case Bytecodes::_lload_2 :
|
|
437 case Bytecodes::_lload_3 :
|
|
438 index = opcode - Bytecodes::_lload_0;
|
|
439 verify_lload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
440 no_control_flow = false; break;
|
|
441 case Bytecodes::_fload :
|
|
442 verify_fload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
443 no_control_flow = false; break;
|
|
444 case Bytecodes::_fload_0 :
|
|
445 case Bytecodes::_fload_1 :
|
|
446 case Bytecodes::_fload_2 :
|
|
447 case Bytecodes::_fload_3 :
|
|
448 index = opcode - Bytecodes::_fload_0;
|
|
449 verify_fload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
450 no_control_flow = false; break;
|
|
451 case Bytecodes::_dload :
|
|
452 verify_dload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
453 no_control_flow = false; break;
|
|
454 case Bytecodes::_dload_0 :
|
|
455 case Bytecodes::_dload_1 :
|
|
456 case Bytecodes::_dload_2 :
|
|
457 case Bytecodes::_dload_3 :
|
|
458 index = opcode - Bytecodes::_dload_0;
|
|
459 verify_dload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
460 no_control_flow = false; break;
|
|
461 case Bytecodes::_aload :
|
|
462 verify_aload(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
463 no_control_flow = false; break;
|
|
464 case Bytecodes::_aload_0 :
|
|
465 case Bytecodes::_aload_1 :
|
|
466 case Bytecodes::_aload_2 :
|
|
467 case Bytecodes::_aload_3 :
|
|
468 index = opcode - Bytecodes::_aload_0;
|
|
469 verify_aload(index, ¤t_frame, CHECK_VERIFY(this));
|
|
470 no_control_flow = false; break;
|
|
471 case Bytecodes::_iaload :
|
|
472 type = current_frame.pop_stack(
|
|
473 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
474 atype = current_frame.pop_stack(
|
|
475 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
476 if (!atype.is_int_array()) {
|
|
477 verify_error(bci, bad_type_msg, "iaload");
|
|
478 return;
|
|
479 }
|
|
480 current_frame.push_stack(
|
|
481 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
482 no_control_flow = false; break;
|
|
483 case Bytecodes::_baload :
|
|
484 type = current_frame.pop_stack(
|
|
485 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
486 atype = current_frame.pop_stack(
|
|
487 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
488 if (!atype.is_bool_array() && !atype.is_byte_array()) {
|
|
489 verify_error(bci, bad_type_msg, "baload");
|
|
490 return;
|
|
491 }
|
|
492 current_frame.push_stack(
|
|
493 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
494 no_control_flow = false; break;
|
|
495 case Bytecodes::_caload :
|
|
496 type = current_frame.pop_stack(
|
|
497 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
498 atype = current_frame.pop_stack(
|
|
499 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
500 if (!atype.is_char_array()) {
|
|
501 verify_error(bci, bad_type_msg, "caload");
|
|
502 return;
|
|
503 }
|
|
504 current_frame.push_stack(
|
|
505 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
506 no_control_flow = false; break;
|
|
507 case Bytecodes::_saload :
|
|
508 type = current_frame.pop_stack(
|
|
509 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
510 atype = current_frame.pop_stack(
|
|
511 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
512 if (!atype.is_short_array()) {
|
|
513 verify_error(bci, bad_type_msg, "saload");
|
|
514 return;
|
|
515 }
|
|
516 current_frame.push_stack(
|
|
517 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
518 no_control_flow = false; break;
|
|
519 case Bytecodes::_laload :
|
|
520 type = current_frame.pop_stack(
|
|
521 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
522 atype = current_frame.pop_stack(
|
|
523 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
524 if (!atype.is_long_array()) {
|
|
525 verify_error(bci, bad_type_msg, "laload");
|
|
526 return;
|
|
527 }
|
|
528 current_frame.push_stack_2(
|
|
529 VerificationType::long_type(),
|
|
530 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
531 no_control_flow = false; break;
|
|
532 case Bytecodes::_faload :
|
|
533 type = current_frame.pop_stack(
|
|
534 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
535 atype = current_frame.pop_stack(
|
|
536 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
537 if (!atype.is_float_array()) {
|
|
538 verify_error(bci, bad_type_msg, "faload");
|
|
539 return;
|
|
540 }
|
|
541 current_frame.push_stack(
|
|
542 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
543 no_control_flow = false; break;
|
|
544 case Bytecodes::_daload :
|
|
545 type = current_frame.pop_stack(
|
|
546 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
547 atype = current_frame.pop_stack(
|
|
548 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
549 if (!atype.is_double_array()) {
|
|
550 verify_error(bci, bad_type_msg, "daload");
|
|
551 return;
|
|
552 }
|
|
553 current_frame.push_stack_2(
|
|
554 VerificationType::double_type(),
|
|
555 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
556 no_control_flow = false; break;
|
|
557 case Bytecodes::_aaload : {
|
|
558 type = current_frame.pop_stack(
|
|
559 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
560 atype = current_frame.pop_stack(
|
|
561 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
562 if (!atype.is_reference_array()) {
|
|
563 verify_error(bci, bad_type_msg, "aaload");
|
|
564 return;
|
|
565 }
|
|
566 if (atype.is_null()) {
|
|
567 current_frame.push_stack(
|
|
568 VerificationType::null_type(), CHECK_VERIFY(this));
|
|
569 } else {
|
|
570 VerificationType component =
|
|
571 atype.get_component(CHECK_VERIFY(this));
|
|
572 current_frame.push_stack(component, CHECK_VERIFY(this));
|
|
573 }
|
|
574 no_control_flow = false; break;
|
|
575 }
|
|
576 case Bytecodes::_istore :
|
|
577 verify_istore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
578 no_control_flow = false; break;
|
|
579 case Bytecodes::_istore_0 :
|
|
580 case Bytecodes::_istore_1 :
|
|
581 case Bytecodes::_istore_2 :
|
|
582 case Bytecodes::_istore_3 :
|
|
583 index = opcode - Bytecodes::_istore_0;
|
|
584 verify_istore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
585 no_control_flow = false; break;
|
|
586 case Bytecodes::_lstore :
|
|
587 verify_lstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
588 no_control_flow = false; break;
|
|
589 case Bytecodes::_lstore_0 :
|
|
590 case Bytecodes::_lstore_1 :
|
|
591 case Bytecodes::_lstore_2 :
|
|
592 case Bytecodes::_lstore_3 :
|
|
593 index = opcode - Bytecodes::_lstore_0;
|
|
594 verify_lstore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
595 no_control_flow = false; break;
|
|
596 case Bytecodes::_fstore :
|
|
597 verify_fstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
598 no_control_flow = false; break;
|
|
599 case Bytecodes::_fstore_0 :
|
|
600 case Bytecodes::_fstore_1 :
|
|
601 case Bytecodes::_fstore_2 :
|
|
602 case Bytecodes::_fstore_3 :
|
|
603 index = opcode - Bytecodes::_fstore_0;
|
|
604 verify_fstore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
605 no_control_flow = false; break;
|
|
606 case Bytecodes::_dstore :
|
|
607 verify_dstore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
608 no_control_flow = false; break;
|
|
609 case Bytecodes::_dstore_0 :
|
|
610 case Bytecodes::_dstore_1 :
|
|
611 case Bytecodes::_dstore_2 :
|
|
612 case Bytecodes::_dstore_3 :
|
|
613 index = opcode - Bytecodes::_dstore_0;
|
|
614 verify_dstore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
615 no_control_flow = false; break;
|
|
616 case Bytecodes::_astore :
|
|
617 verify_astore(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
618 no_control_flow = false; break;
|
|
619 case Bytecodes::_astore_0 :
|
|
620 case Bytecodes::_astore_1 :
|
|
621 case Bytecodes::_astore_2 :
|
|
622 case Bytecodes::_astore_3 :
|
|
623 index = opcode - Bytecodes::_astore_0;
|
|
624 verify_astore(index, ¤t_frame, CHECK_VERIFY(this));
|
|
625 no_control_flow = false; break;
|
|
626 case Bytecodes::_iastore :
|
|
627 type = current_frame.pop_stack(
|
|
628 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
629 type2 = current_frame.pop_stack(
|
|
630 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
631 atype = current_frame.pop_stack(
|
|
632 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
633 if (!atype.is_int_array()) {
|
|
634 verify_error(bci, bad_type_msg, "iastore");
|
|
635 return;
|
|
636 }
|
|
637 no_control_flow = false; break;
|
|
638 case Bytecodes::_bastore :
|
|
639 type = current_frame.pop_stack(
|
|
640 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
641 type2 = current_frame.pop_stack(
|
|
642 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
643 atype = current_frame.pop_stack(
|
|
644 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
645 if (!atype.is_bool_array() && !atype.is_byte_array()) {
|
|
646 verify_error(bci, bad_type_msg, "bastore");
|
|
647 return;
|
|
648 }
|
|
649 no_control_flow = false; break;
|
|
650 case Bytecodes::_castore :
|
|
651 current_frame.pop_stack(
|
|
652 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
653 current_frame.pop_stack(
|
|
654 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
655 atype = current_frame.pop_stack(
|
|
656 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
657 if (!atype.is_char_array()) {
|
|
658 verify_error(bci, bad_type_msg, "castore");
|
|
659 return;
|
|
660 }
|
|
661 no_control_flow = false; break;
|
|
662 case Bytecodes::_sastore :
|
|
663 current_frame.pop_stack(
|
|
664 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
665 current_frame.pop_stack(
|
|
666 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
667 atype = current_frame.pop_stack(
|
|
668 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
669 if (!atype.is_short_array()) {
|
|
670 verify_error(bci, bad_type_msg, "sastore");
|
|
671 return;
|
|
672 }
|
|
673 no_control_flow = false; break;
|
|
674 case Bytecodes::_lastore :
|
|
675 current_frame.pop_stack_2(
|
|
676 VerificationType::long2_type(),
|
|
677 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
678 current_frame.pop_stack(
|
|
679 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
680 atype = current_frame.pop_stack(
|
|
681 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
682 if (!atype.is_long_array()) {
|
|
683 verify_error(bci, bad_type_msg, "lastore");
|
|
684 return;
|
|
685 }
|
|
686 no_control_flow = false; break;
|
|
687 case Bytecodes::_fastore :
|
|
688 current_frame.pop_stack(
|
|
689 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
690 current_frame.pop_stack
|
|
691 (VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
692 atype = current_frame.pop_stack(
|
|
693 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
694 if (!atype.is_float_array()) {
|
|
695 verify_error(bci, bad_type_msg, "fastore");
|
|
696 return;
|
|
697 }
|
|
698 no_control_flow = false; break;
|
|
699 case Bytecodes::_dastore :
|
|
700 current_frame.pop_stack_2(
|
|
701 VerificationType::double2_type(),
|
|
702 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
703 current_frame.pop_stack(
|
|
704 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
705 atype = current_frame.pop_stack(
|
|
706 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
707 if (!atype.is_double_array()) {
|
|
708 verify_error(bci, bad_type_msg, "dastore");
|
|
709 return;
|
|
710 }
|
|
711 no_control_flow = false; break;
|
|
712 case Bytecodes::_aastore :
|
|
713 type = current_frame.pop_stack(
|
|
714 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
715 type2 = current_frame.pop_stack(
|
|
716 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
717 atype = current_frame.pop_stack(
|
|
718 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
719 // more type-checking is done at runtime
|
|
720 if (!atype.is_reference_array()) {
|
|
721 verify_error(bci, bad_type_msg, "aastore");
|
|
722 return;
|
|
723 }
|
|
724 // 4938384: relaxed constraint in JVMS 3nd edition.
|
|
725 no_control_flow = false; break;
|
|
726 case Bytecodes::_pop :
|
|
727 current_frame.pop_stack(
|
|
728 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
729 no_control_flow = false; break;
|
|
730 case Bytecodes::_pop2 :
|
|
731 type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
732 if (type.is_category1()) {
|
|
733 current_frame.pop_stack(
|
|
734 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
735 } else if (type.is_category2_2nd()) {
|
|
736 current_frame.pop_stack(
|
|
737 VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
738 } else {
|
|
739 verify_error(bci, bad_type_msg, "pop2");
|
|
740 return;
|
|
741 }
|
|
742 no_control_flow = false; break;
|
|
743 case Bytecodes::_dup :
|
|
744 type = current_frame.pop_stack(
|
|
745 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
746 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
747 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
748 no_control_flow = false; break;
|
|
749 case Bytecodes::_dup_x1 :
|
|
750 type = current_frame.pop_stack(
|
|
751 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
752 type2 = current_frame.pop_stack(
|
|
753 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
754 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
755 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
756 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
757 no_control_flow = false; break;
|
|
758 case Bytecodes::_dup_x2 :
|
|
759 {
|
|
760 VerificationType type3;
|
|
761 type = current_frame.pop_stack(
|
|
762 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
763 type2 = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
764 if (type2.is_category1()) {
|
|
765 type3 = current_frame.pop_stack(
|
|
766 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
767 } else if (type2.is_category2_2nd()) {
|
|
768 type3 = current_frame.pop_stack(
|
|
769 VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
770 } else {
|
|
771 verify_error(bci, bad_type_msg, "dup_x2");
|
|
772 return;
|
|
773 }
|
|
774 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
775 current_frame.push_stack(type3, CHECK_VERIFY(this));
|
|
776 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
777 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
778 no_control_flow = false; break;
|
|
779 }
|
|
780 case Bytecodes::_dup2 :
|
|
781 type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
782 if (type.is_category1()) {
|
|
783 type2 = current_frame.pop_stack(
|
|
784 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
785 } else if (type.is_category2_2nd()) {
|
|
786 type2 = current_frame.pop_stack(
|
|
787 VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
788 } else {
|
|
789 verify_error(bci, bad_type_msg, "dup2");
|
|
790 return;
|
|
791 }
|
|
792 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
793 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
794 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
795 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
796 no_control_flow = false; break;
|
|
797 case Bytecodes::_dup2_x1 :
|
|
798 {
|
|
799 VerificationType type3;
|
|
800 type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
801 if (type.is_category1()) {
|
|
802 type2 = current_frame.pop_stack(
|
|
803 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
804 } else if(type.is_category2_2nd()) {
|
|
805 type2 = current_frame.pop_stack
|
|
806 (VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
807 } else {
|
|
808 verify_error(bci, bad_type_msg, "dup2_x1");
|
|
809 return;
|
|
810 }
|
|
811 type3 = current_frame.pop_stack(
|
|
812 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
813 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
814 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
815 current_frame.push_stack(type3, CHECK_VERIFY(this));
|
|
816 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
817 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
818 no_control_flow = false; break;
|
|
819 }
|
|
820 case Bytecodes::_dup2_x2 :
|
|
821 {
|
|
822 VerificationType type3, type4;
|
|
823 type = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
824 if (type.is_category1()) {
|
|
825 type2 = current_frame.pop_stack(
|
|
826 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
827 } else if (type.is_category2_2nd()) {
|
|
828 type2 = current_frame.pop_stack(
|
|
829 VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
830 } else {
|
|
831 verify_error(bci, bad_type_msg, "dup2_x2");
|
|
832 return;
|
|
833 }
|
|
834 type3 = current_frame.pop_stack(CHECK_VERIFY(this));
|
|
835 if (type3.is_category1()) {
|
|
836 type4 = current_frame.pop_stack(
|
|
837 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
838 } else if (type3.is_category2_2nd()) {
|
|
839 type4 = current_frame.pop_stack(
|
|
840 VerificationType::category2_check(), CHECK_VERIFY(this));
|
|
841 } else {
|
|
842 verify_error(bci, bad_type_msg, "dup2_x2");
|
|
843 return;
|
|
844 }
|
|
845 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
846 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
847 current_frame.push_stack(type4, CHECK_VERIFY(this));
|
|
848 current_frame.push_stack(type3, CHECK_VERIFY(this));
|
|
849 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
850 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
851 no_control_flow = false; break;
|
|
852 }
|
|
853 case Bytecodes::_swap :
|
|
854 type = current_frame.pop_stack(
|
|
855 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
856 type2 = current_frame.pop_stack(
|
|
857 VerificationType::category1_check(), CHECK_VERIFY(this));
|
|
858 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
859 current_frame.push_stack(type2, CHECK_VERIFY(this));
|
|
860 no_control_flow = false; break;
|
|
861 case Bytecodes::_iadd :
|
|
862 case Bytecodes::_isub :
|
|
863 case Bytecodes::_imul :
|
|
864 case Bytecodes::_idiv :
|
|
865 case Bytecodes::_irem :
|
|
866 case Bytecodes::_ishl :
|
|
867 case Bytecodes::_ishr :
|
|
868 case Bytecodes::_iushr :
|
|
869 case Bytecodes::_ior :
|
|
870 case Bytecodes::_ixor :
|
|
871 case Bytecodes::_iand :
|
|
872 current_frame.pop_stack(
|
|
873 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
874 // fall through
|
|
875 case Bytecodes::_ineg :
|
|
876 current_frame.pop_stack(
|
|
877 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
878 current_frame.push_stack(
|
|
879 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
880 no_control_flow = false; break;
|
|
881 case Bytecodes::_ladd :
|
|
882 case Bytecodes::_lsub :
|
|
883 case Bytecodes::_lmul :
|
|
884 case Bytecodes::_ldiv :
|
|
885 case Bytecodes::_lrem :
|
|
886 case Bytecodes::_land :
|
|
887 case Bytecodes::_lor :
|
|
888 case Bytecodes::_lxor :
|
|
889 current_frame.pop_stack_2(
|
|
890 VerificationType::long2_type(),
|
|
891 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
892 // fall through
|
|
893 case Bytecodes::_lneg :
|
|
894 current_frame.pop_stack_2(
|
|
895 VerificationType::long2_type(),
|
|
896 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
897 current_frame.push_stack_2(
|
|
898 VerificationType::long_type(),
|
|
899 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
900 no_control_flow = false; break;
|
|
901 case Bytecodes::_lshl :
|
|
902 case Bytecodes::_lshr :
|
|
903 case Bytecodes::_lushr :
|
|
904 current_frame.pop_stack(
|
|
905 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
906 current_frame.pop_stack_2(
|
|
907 VerificationType::long2_type(),
|
|
908 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
909 current_frame.push_stack_2(
|
|
910 VerificationType::long_type(),
|
|
911 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
912 no_control_flow = false; break;
|
|
913 case Bytecodes::_fadd :
|
|
914 case Bytecodes::_fsub :
|
|
915 case Bytecodes::_fmul :
|
|
916 case Bytecodes::_fdiv :
|
|
917 case Bytecodes::_frem :
|
|
918 current_frame.pop_stack(
|
|
919 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
920 // fall through
|
|
921 case Bytecodes::_fneg :
|
|
922 current_frame.pop_stack(
|
|
923 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
924 current_frame.push_stack(
|
|
925 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
926 no_control_flow = false; break;
|
|
927 case Bytecodes::_dadd :
|
|
928 case Bytecodes::_dsub :
|
|
929 case Bytecodes::_dmul :
|
|
930 case Bytecodes::_ddiv :
|
|
931 case Bytecodes::_drem :
|
|
932 current_frame.pop_stack_2(
|
|
933 VerificationType::double2_type(),
|
|
934 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
935 // fall through
|
|
936 case Bytecodes::_dneg :
|
|
937 current_frame.pop_stack_2(
|
|
938 VerificationType::double2_type(),
|
|
939 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
940 current_frame.push_stack_2(
|
|
941 VerificationType::double_type(),
|
|
942 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
943 no_control_flow = false; break;
|
|
944 case Bytecodes::_iinc :
|
|
945 verify_iinc(bcs.get_index(), ¤t_frame, CHECK_VERIFY(this));
|
|
946 no_control_flow = false; break;
|
|
947 case Bytecodes::_i2l :
|
|
948 type = current_frame.pop_stack(
|
|
949 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
950 current_frame.push_stack_2(
|
|
951 VerificationType::long_type(),
|
|
952 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
953 no_control_flow = false; break;
|
|
954 case Bytecodes::_l2i :
|
|
955 current_frame.pop_stack_2(
|
|
956 VerificationType::long2_type(),
|
|
957 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
958 current_frame.push_stack(
|
|
959 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
960 no_control_flow = false; break;
|
|
961 case Bytecodes::_i2f :
|
|
962 current_frame.pop_stack(
|
|
963 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
964 current_frame.push_stack(
|
|
965 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
966 no_control_flow = false; break;
|
|
967 case Bytecodes::_i2d :
|
|
968 current_frame.pop_stack(
|
|
969 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
970 current_frame.push_stack_2(
|
|
971 VerificationType::double_type(),
|
|
972 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
973 no_control_flow = false; break;
|
|
974 case Bytecodes::_l2f :
|
|
975 current_frame.pop_stack_2(
|
|
976 VerificationType::long2_type(),
|
|
977 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
978 current_frame.push_stack(
|
|
979 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
980 no_control_flow = false; break;
|
|
981 case Bytecodes::_l2d :
|
|
982 current_frame.pop_stack_2(
|
|
983 VerificationType::long2_type(),
|
|
984 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
985 current_frame.push_stack_2(
|
|
986 VerificationType::double_type(),
|
|
987 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
988 no_control_flow = false; break;
|
|
989 case Bytecodes::_f2i :
|
|
990 current_frame.pop_stack(
|
|
991 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
992 current_frame.push_stack(
|
|
993 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
994 no_control_flow = false; break;
|
|
995 case Bytecodes::_f2l :
|
|
996 current_frame.pop_stack(
|
|
997 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
998 current_frame.push_stack_2(
|
|
999 VerificationType::long_type(),
|
|
1000 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1001 no_control_flow = false; break;
|
|
1002 case Bytecodes::_f2d :
|
|
1003 current_frame.pop_stack(
|
|
1004 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1005 current_frame.push_stack_2(
|
|
1006 VerificationType::double_type(),
|
|
1007 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
1008 no_control_flow = false; break;
|
|
1009 case Bytecodes::_d2i :
|
|
1010 current_frame.pop_stack_2(
|
|
1011 VerificationType::double2_type(),
|
|
1012 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1013 current_frame.push_stack(
|
|
1014 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1015 no_control_flow = false; break;
|
|
1016 case Bytecodes::_d2l :
|
|
1017 current_frame.pop_stack_2(
|
|
1018 VerificationType::double2_type(),
|
|
1019 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1020 current_frame.push_stack_2(
|
|
1021 VerificationType::long_type(),
|
|
1022 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1023 no_control_flow = false; break;
|
|
1024 case Bytecodes::_d2f :
|
|
1025 current_frame.pop_stack_2(
|
|
1026 VerificationType::double2_type(),
|
|
1027 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1028 current_frame.push_stack(
|
|
1029 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1030 no_control_flow = false; break;
|
|
1031 case Bytecodes::_i2b :
|
|
1032 case Bytecodes::_i2c :
|
|
1033 case Bytecodes::_i2s :
|
|
1034 current_frame.pop_stack(
|
|
1035 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1036 current_frame.push_stack(
|
|
1037 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1038 no_control_flow = false; break;
|
|
1039 case Bytecodes::_lcmp :
|
|
1040 current_frame.pop_stack_2(
|
|
1041 VerificationType::long2_type(),
|
|
1042 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
1043 current_frame.pop_stack_2(
|
|
1044 VerificationType::long2_type(),
|
|
1045 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
1046 current_frame.push_stack(
|
|
1047 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1048 no_control_flow = false; break;
|
|
1049 case Bytecodes::_fcmpl :
|
|
1050 case Bytecodes::_fcmpg :
|
|
1051 current_frame.pop_stack(
|
|
1052 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1053 current_frame.pop_stack(
|
|
1054 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1055 current_frame.push_stack(
|
|
1056 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1057 no_control_flow = false; break;
|
|
1058 case Bytecodes::_dcmpl :
|
|
1059 case Bytecodes::_dcmpg :
|
|
1060 current_frame.pop_stack_2(
|
|
1061 VerificationType::double2_type(),
|
|
1062 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1063 current_frame.pop_stack_2(
|
|
1064 VerificationType::double2_type(),
|
|
1065 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1066 current_frame.push_stack(
|
|
1067 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1068 no_control_flow = false; break;
|
|
1069 case Bytecodes::_if_icmpeq:
|
|
1070 case Bytecodes::_if_icmpne:
|
|
1071 case Bytecodes::_if_icmplt:
|
|
1072 case Bytecodes::_if_icmpge:
|
|
1073 case Bytecodes::_if_icmpgt:
|
|
1074 case Bytecodes::_if_icmple:
|
|
1075 current_frame.pop_stack(
|
|
1076 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1077 // fall through
|
|
1078 case Bytecodes::_ifeq:
|
|
1079 case Bytecodes::_ifne:
|
|
1080 case Bytecodes::_iflt:
|
|
1081 case Bytecodes::_ifge:
|
|
1082 case Bytecodes::_ifgt:
|
|
1083 case Bytecodes::_ifle:
|
|
1084 current_frame.pop_stack(
|
|
1085 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1086 target = bcs.dest();
|
|
1087 stackmap_table.check_jump_target(
|
|
1088 ¤t_frame, target, CHECK_VERIFY(this));
|
|
1089 no_control_flow = false; break;
|
|
1090 case Bytecodes::_if_acmpeq :
|
|
1091 case Bytecodes::_if_acmpne :
|
|
1092 current_frame.pop_stack(
|
|
1093 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1094 // fall through
|
|
1095 case Bytecodes::_ifnull :
|
|
1096 case Bytecodes::_ifnonnull :
|
|
1097 current_frame.pop_stack(
|
|
1098 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1099 target = bcs.dest();
|
|
1100 stackmap_table.check_jump_target
|
|
1101 (¤t_frame, target, CHECK_VERIFY(this));
|
|
1102 no_control_flow = false; break;
|
|
1103 case Bytecodes::_goto :
|
|
1104 target = bcs.dest();
|
|
1105 stackmap_table.check_jump_target(
|
|
1106 ¤t_frame, target, CHECK_VERIFY(this));
|
|
1107 no_control_flow = true; break;
|
|
1108 case Bytecodes::_goto_w :
|
|
1109 target = bcs.dest_w();
|
|
1110 stackmap_table.check_jump_target(
|
|
1111 ¤t_frame, target, CHECK_VERIFY(this));
|
|
1112 no_control_flow = true; break;
|
|
1113 case Bytecodes::_tableswitch :
|
|
1114 case Bytecodes::_lookupswitch :
|
|
1115 verify_switch(
|
|
1116 &bcs, code_length, code_data, ¤t_frame,
|
|
1117 &stackmap_table, CHECK_VERIFY(this));
|
|
1118 no_control_flow = true; break;
|
|
1119 case Bytecodes::_ireturn :
|
|
1120 type = current_frame.pop_stack(
|
|
1121 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1122 verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1123 no_control_flow = true; break;
|
|
1124 case Bytecodes::_lreturn :
|
|
1125 type2 = current_frame.pop_stack(
|
|
1126 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1127 type = current_frame.pop_stack(
|
|
1128 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
1129 verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1130 no_control_flow = true; break;
|
|
1131 case Bytecodes::_freturn :
|
|
1132 type = current_frame.pop_stack(
|
|
1133 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1134 verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1135 no_control_flow = true; break;
|
|
1136 case Bytecodes::_dreturn :
|
|
1137 type2 = current_frame.pop_stack(
|
|
1138 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
1139 type = current_frame.pop_stack(
|
|
1140 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
1141 verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1142 no_control_flow = true; break;
|
|
1143 case Bytecodes::_areturn :
|
|
1144 type = current_frame.pop_stack(
|
|
1145 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1146 verify_return_value(return_type, type, bci, CHECK_VERIFY(this));
|
|
1147 no_control_flow = true; break;
|
|
1148 case Bytecodes::_return :
|
|
1149 if (return_type != VerificationType::bogus_type()) {
|
|
1150 verify_error(bci, "Method expects no return value");
|
|
1151 return;
|
|
1152 }
|
|
1153 // Make sure "this" has been initialized if current method is an
|
|
1154 // <init>
|
|
1155 if (_method->name() == vmSymbols::object_initializer_name() &&
|
|
1156 current_frame.flag_this_uninit()) {
|
|
1157 verify_error(bci,
|
|
1158 "Constructor must call super() or this() before return");
|
|
1159 return;
|
|
1160 }
|
|
1161 no_control_flow = true; break;
|
|
1162 case Bytecodes::_getstatic :
|
|
1163 case Bytecodes::_putstatic :
|
|
1164 case Bytecodes::_getfield :
|
|
1165 case Bytecodes::_putfield :
|
|
1166 verify_field_instructions(
|
|
1167 &bcs, ¤t_frame, cp, CHECK_VERIFY(this));
|
|
1168 no_control_flow = false; break;
|
|
1169 case Bytecodes::_invokevirtual :
|
|
1170 case Bytecodes::_invokespecial :
|
|
1171 case Bytecodes::_invokestatic :
|
|
1172 verify_invoke_instructions(
|
|
1173 &bcs, code_length, ¤t_frame,
|
|
1174 &this_uninit, return_type, cp, CHECK_VERIFY(this));
|
|
1175 no_control_flow = false; break;
|
|
1176 case Bytecodes::_invokeinterface :
|
|
1177 verify_invoke_instructions(
|
|
1178 &bcs, code_length, ¤t_frame,
|
|
1179 &this_uninit, return_type, cp, CHECK_VERIFY(this));
|
|
1180 no_control_flow = false; break;
|
|
1181 case Bytecodes::_new :
|
|
1182 {
|
|
1183 index = bcs.get_index_big();
|
|
1184 verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1185 VerificationType new_class_type =
|
|
1186 cp_index_to_type(index, cp, CHECK_VERIFY(this));
|
|
1187 if (!new_class_type.is_object()) {
|
|
1188 verify_error(bci, "Illegal new instruction");
|
|
1189 return;
|
|
1190 }
|
|
1191 type = VerificationType::uninitialized_type(bci);
|
|
1192 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
1193 no_control_flow = false; break;
|
|
1194 }
|
|
1195 case Bytecodes::_newarray :
|
|
1196 type = get_newarray_type(bcs.get_index(), bci, CHECK_VERIFY(this));
|
|
1197 current_frame.pop_stack(
|
|
1198 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1199 current_frame.push_stack(type, CHECK_VERIFY(this));
|
|
1200 no_control_flow = false; break;
|
|
1201 case Bytecodes::_anewarray :
|
|
1202 verify_anewarray(
|
|
1203 bcs.get_index_big(), cp, ¤t_frame, CHECK_VERIFY(this));
|
|
1204 no_control_flow = false; break;
|
|
1205 case Bytecodes::_arraylength :
|
|
1206 type = current_frame.pop_stack(
|
|
1207 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1208 if (!type.is_array()) {
|
|
1209 verify_error(bci, bad_type_msg, "arraylength");
|
|
1210 }
|
|
1211 current_frame.push_stack(
|
|
1212 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1213 no_control_flow = false; break;
|
|
1214 case Bytecodes::_checkcast :
|
|
1215 {
|
|
1216 index = bcs.get_index_big();
|
|
1217 verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1218 current_frame.pop_stack(
|
|
1219 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1220 VerificationType klass_type = cp_index_to_type(
|
|
1221 index, cp, CHECK_VERIFY(this));
|
|
1222 current_frame.push_stack(klass_type, CHECK_VERIFY(this));
|
|
1223 no_control_flow = false; break;
|
|
1224 }
|
|
1225 case Bytecodes::_instanceof : {
|
|
1226 index = bcs.get_index_big();
|
|
1227 verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1228 current_frame.pop_stack(
|
|
1229 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1230 current_frame.push_stack(
|
|
1231 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1232 no_control_flow = false; break;
|
|
1233 }
|
|
1234 case Bytecodes::_monitorenter :
|
|
1235 case Bytecodes::_monitorexit :
|
|
1236 current_frame.pop_stack(
|
|
1237 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1238 no_control_flow = false; break;
|
|
1239 case Bytecodes::_multianewarray :
|
|
1240 {
|
|
1241 index = bcs.get_index_big();
|
|
1242 u2 dim = *(bcs.bcp()+3);
|
|
1243 verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
1244 VerificationType new_array_type =
|
|
1245 cp_index_to_type(index, cp, CHECK_VERIFY(this));
|
|
1246 if (!new_array_type.is_array()) {
|
|
1247 verify_error(bci,
|
|
1248 "Illegal constant pool index in multianewarray instruction");
|
|
1249 return;
|
|
1250 }
|
|
1251 if (dim < 1 || new_array_type.dimensions() < dim) {
|
|
1252 verify_error(bci,
|
|
1253 "Illegal dimension in multianewarray instruction");
|
|
1254 return;
|
|
1255 }
|
|
1256 for (int i = 0; i < dim; i++) {
|
|
1257 current_frame.pop_stack(
|
|
1258 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1259 }
|
|
1260 current_frame.push_stack(new_array_type, CHECK_VERIFY(this));
|
|
1261 no_control_flow = false; break;
|
|
1262 }
|
|
1263 case Bytecodes::_athrow :
|
|
1264 type = VerificationType::reference_type(
|
|
1265 vmSymbols::java_lang_Throwable());
|
|
1266 current_frame.pop_stack(type, CHECK_VERIFY(this));
|
|
1267 no_control_flow = true; break;
|
|
1268 default:
|
|
1269 // We only need to check the valid bytecodes in class file.
|
|
1270 // And jsr and ret are not in the new class file format in JDK1.5.
|
|
1271 verify_error(bci, "Bad instruction");
|
|
1272 no_control_flow = false;
|
|
1273 return;
|
|
1274 } // end switch
|
|
1275 } // end Merge with the next instruction
|
|
1276
|
|
1277 // Look for possible jump target in exception handlers and see if it
|
|
1278 // matches current_frame
|
|
1279 if (bci >= ex_min && bci < ex_max) {
|
|
1280 verify_exception_handler_targets(
|
|
1281 bci, this_uninit, ¤t_frame, &stackmap_table, CHECK_VERIFY(this));
|
|
1282 }
|
|
1283 } // end while
|
|
1284
|
|
1285 // Make sure that control flow does not fall through end of the method
|
|
1286 if (!no_control_flow) {
|
|
1287 verify_error(code_length, "Control flow falls through code end");
|
|
1288 return;
|
|
1289 }
|
|
1290 }
|
|
1291
|
|
1292 char* ClassVerifier::generate_code_data(methodHandle m, u4 code_length, TRAPS) {
|
|
1293 char* code_data = NEW_RESOURCE_ARRAY(char, code_length);
|
|
1294 memset(code_data, 0, sizeof(char) * code_length);
|
|
1295 RawBytecodeStream bcs(m);
|
|
1296
|
|
1297 while (!bcs.is_last_bytecode()) {
|
|
1298 if (bcs.raw_next() != Bytecodes::_illegal) {
|
|
1299 int bci = bcs.bci();
|
|
1300 if (bcs.code() == Bytecodes::_new) {
|
|
1301 code_data[bci] = NEW_OFFSET;
|
|
1302 } else {
|
|
1303 code_data[bci] = BYTECODE_OFFSET;
|
|
1304 }
|
|
1305 } else {
|
|
1306 verify_error(bcs.bci(), "Bad instruction");
|
|
1307 return NULL;
|
|
1308 }
|
|
1309 }
|
|
1310
|
|
1311 return code_data;
|
|
1312 }
|
|
1313
|
|
1314 void ClassVerifier::verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS) {
|
|
1315 typeArrayHandle exhandlers (THREAD, _method->exception_table());
|
|
1316 constantPoolHandle cp (THREAD, _method->constants());
|
|
1317
|
|
1318 if (exhandlers() != NULL) {
|
|
1319 for(int i = 0; i < exhandlers->length();) {
|
|
1320 u2 start_pc = exhandlers->int_at(i++);
|
|
1321 u2 end_pc = exhandlers->int_at(i++);
|
|
1322 u2 handler_pc = exhandlers->int_at(i++);
|
|
1323 if (start_pc >= code_length || code_data[start_pc] == 0) {
|
|
1324 class_format_error("Illegal exception table start_pc %d", start_pc);
|
|
1325 return;
|
|
1326 }
|
|
1327 if (end_pc != code_length) { // special case: end_pc == code_length
|
|
1328 if (end_pc > code_length || code_data[end_pc] == 0) {
|
|
1329 class_format_error("Illegal exception table end_pc %d", end_pc);
|
|
1330 return;
|
|
1331 }
|
|
1332 }
|
|
1333 if (handler_pc >= code_length || code_data[handler_pc] == 0) {
|
|
1334 class_format_error("Illegal exception table handler_pc %d", handler_pc);
|
|
1335 return;
|
|
1336 }
|
|
1337 int catch_type_index = exhandlers->int_at(i++);
|
|
1338 if (catch_type_index != 0) {
|
|
1339 VerificationType catch_type = cp_index_to_type(
|
|
1340 catch_type_index, cp, CHECK_VERIFY(this));
|
|
1341 VerificationType throwable =
|
|
1342 VerificationType::reference_type(vmSymbols::java_lang_Throwable());
|
|
1343 bool is_subclass = throwable.is_assignable_from(
|
|
1344 catch_type, current_class(), CHECK_VERIFY(this));
|
|
1345 if (!is_subclass) {
|
|
1346 // 4286534: should throw VerifyError according to recent spec change
|
|
1347 verify_error(
|
|
1348 "Catch type is not a subclass of Throwable in handler %d",
|
|
1349 handler_pc);
|
|
1350 return;
|
|
1351 }
|
|
1352 }
|
|
1353 if (start_pc < min) min = start_pc;
|
|
1354 if (end_pc > max) max = end_pc;
|
|
1355 }
|
|
1356 }
|
|
1357 }
|
|
1358
|
|
1359 void ClassVerifier::verify_local_variable_table(u4 code_length, char* code_data, TRAPS) {
|
|
1360 int localvariable_table_length = _method()->localvariable_table_length();
|
|
1361 if (localvariable_table_length > 0) {
|
|
1362 LocalVariableTableElement* table = _method()->localvariable_table_start();
|
|
1363 for (int i = 0; i < localvariable_table_length; i++) {
|
|
1364 u2 start_bci = table[i].start_bci;
|
|
1365 u2 length = table[i].length;
|
|
1366
|
|
1367 if (start_bci >= code_length || code_data[start_bci] == 0) {
|
|
1368 class_format_error(
|
|
1369 "Illegal local variable table start_pc %d", start_bci);
|
|
1370 return;
|
|
1371 }
|
|
1372 u4 end_bci = (u4)(start_bci + length);
|
|
1373 if (end_bci != code_length) {
|
|
1374 if (end_bci >= code_length || code_data[end_bci] == 0) {
|
|
1375 class_format_error( "Illegal local variable table length %d", length);
|
|
1376 return;
|
|
1377 }
|
|
1378 }
|
|
1379 }
|
|
1380 }
|
|
1381 }
|
|
1382
|
|
1383 u2 ClassVerifier::verify_stackmap_table(u2 stackmap_index, u2 bci,
|
|
1384 StackMapFrame* current_frame,
|
|
1385 StackMapTable* stackmap_table,
|
|
1386 bool no_control_flow, TRAPS) {
|
|
1387 if (stackmap_index < stackmap_table->get_frame_count()) {
|
|
1388 u2 this_offset = stackmap_table->get_offset(stackmap_index);
|
|
1389 if (no_control_flow && this_offset > bci) {
|
|
1390 verify_error(bci, "Expecting a stack map frame");
|
|
1391 return 0;
|
|
1392 }
|
|
1393 if (this_offset == bci) {
|
|
1394 // See if current stack map can be assigned to the frame in table.
|
|
1395 // current_frame is the stackmap frame got from the last instruction.
|
|
1396 // If matched, current_frame will be updated by this method.
|
|
1397 bool match = stackmap_table->match_stackmap(
|
|
1398 current_frame, this_offset, stackmap_index,
|
|
1399 !no_control_flow, true, CHECK_VERIFY_(this, 0));
|
|
1400 if (!match) {
|
|
1401 // report type error
|
|
1402 verify_error(bci, "Instruction type does not match stack map");
|
|
1403 return 0;
|
|
1404 }
|
|
1405 stackmap_index++;
|
|
1406 } else if (this_offset < bci) {
|
|
1407 // current_offset should have met this_offset.
|
|
1408 class_format_error("Bad stack map offset %d", this_offset);
|
|
1409 return 0;
|
|
1410 }
|
|
1411 } else if (no_control_flow) {
|
|
1412 verify_error(bci, "Expecting a stack map frame");
|
|
1413 return 0;
|
|
1414 }
|
|
1415 return stackmap_index;
|
|
1416 }
|
|
1417
|
|
1418 void ClassVerifier::verify_exception_handler_targets(u2 bci, bool this_uninit, StackMapFrame* current_frame,
|
|
1419 StackMapTable* stackmap_table, TRAPS) {
|
|
1420 constantPoolHandle cp (THREAD, _method->constants());
|
|
1421 typeArrayHandle exhandlers (THREAD, _method->exception_table());
|
|
1422 if (exhandlers() != NULL) {
|
|
1423 for(int i = 0; i < exhandlers->length();) {
|
|
1424 u2 start_pc = exhandlers->int_at(i++);
|
|
1425 u2 end_pc = exhandlers->int_at(i++);
|
|
1426 u2 handler_pc = exhandlers->int_at(i++);
|
|
1427 int catch_type_index = exhandlers->int_at(i++);
|
|
1428 if(bci >= start_pc && bci < end_pc) {
|
|
1429 u1 flags = current_frame->flags();
|
|
1430 if (this_uninit) { flags |= FLAG_THIS_UNINIT; }
|
|
1431
|
|
1432 ResourceMark rm(THREAD);
|
|
1433 StackMapFrame* new_frame = current_frame->frame_in_exception_handler(flags);
|
|
1434 if (catch_type_index != 0) {
|
|
1435 // We know that this index refers to a subclass of Throwable
|
|
1436 VerificationType catch_type = cp_index_to_type(
|
|
1437 catch_type_index, cp, CHECK_VERIFY(this));
|
|
1438 new_frame->push_stack(catch_type, CHECK_VERIFY(this));
|
|
1439 } else {
|
|
1440 VerificationType throwable =
|
|
1441 VerificationType::reference_type(vmSymbols::java_lang_Throwable());
|
|
1442 new_frame->push_stack(throwable, CHECK_VERIFY(this));
|
|
1443 }
|
|
1444 bool match = stackmap_table->match_stackmap(
|
|
1445 new_frame, handler_pc, true, false, CHECK_VERIFY(this));
|
|
1446 if (!match) {
|
|
1447 verify_error(bci,
|
|
1448 "Stack map does not match the one at exception handler %d",
|
|
1449 handler_pc);
|
|
1450 return;
|
|
1451 }
|
|
1452 }
|
|
1453 }
|
|
1454 }
|
|
1455 }
|
|
1456
|
|
1457 void ClassVerifier::verify_cp_index(constantPoolHandle cp, int index, TRAPS) {
|
|
1458 int nconstants = cp->length();
|
|
1459 if ((index <= 0) || (index >= nconstants)) {
|
|
1460 verify_error("Illegal constant pool index %d in class %s",
|
|
1461 index, instanceKlass::cast(cp->pool_holder())->external_name());
|
|
1462 return;
|
|
1463 }
|
|
1464 }
|
|
1465
|
|
1466 void ClassVerifier::verify_cp_type(
|
|
1467 int index, constantPoolHandle cp, unsigned int types, TRAPS) {
|
|
1468
|
|
1469 // In some situations, bytecode rewriting may occur while we're verifying.
|
|
1470 // In this case, a constant pool cache exists and some indices refer to that
|
|
1471 // instead. Get the original index for the tag check
|
|
1472 constantPoolCacheOop cache = cp->cache();
|
|
1473 if (cache != NULL &&
|
|
1474 ((types == (1 << JVM_CONSTANT_InterfaceMethodref)) ||
|
|
1475 (types == (1 << JVM_CONSTANT_Methodref)) ||
|
|
1476 (types == (1 << JVM_CONSTANT_Fieldref)))) {
|
|
1477 int native_index = index;
|
|
1478 if (Bytes::is_Java_byte_ordering_different()) {
|
|
1479 native_index = Bytes::swap_u2(index);
|
|
1480 }
|
|
1481 assert((native_index >= 0) && (native_index < cache->length()),
|
|
1482 "Must be a legal index into the cp cache");
|
|
1483 index = cache->entry_at(native_index)->constant_pool_index();
|
|
1484 }
|
|
1485
|
|
1486 verify_cp_index(cp, index, CHECK_VERIFY(this));
|
|
1487 unsigned int tag = cp->tag_at(index).value();
|
|
1488 if ((types & (1 << tag)) == 0) {
|
|
1489 verify_error(
|
|
1490 "Illegal type at constant pool entry %d in class %s",
|
|
1491 index, instanceKlass::cast(cp->pool_holder())->external_name());
|
|
1492 return;
|
|
1493 }
|
|
1494 }
|
|
1495
|
|
1496 void ClassVerifier::verify_cp_class_type(
|
|
1497 int index, constantPoolHandle cp, TRAPS) {
|
|
1498 verify_cp_index(cp, index, CHECK_VERIFY(this));
|
|
1499 constantTag tag = cp->tag_at(index);
|
|
1500 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
|
|
1501 verify_error("Illegal type at constant pool entry %d in class %s",
|
|
1502 index, instanceKlass::cast(cp->pool_holder())->external_name());
|
|
1503 return;
|
|
1504 }
|
|
1505 }
|
|
1506
|
|
1507 void ClassVerifier::format_error_message(
|
|
1508 const char* fmt, int offset, va_list va) {
|
|
1509 ResourceMark rm(_thread);
|
|
1510 stringStream message(_message, _message_buffer_len);
|
|
1511 message.vprint(fmt, va);
|
|
1512 if (!_method.is_null()) {
|
|
1513 message.print(" in method %s", _method->name_and_sig_as_C_string());
|
|
1514 }
|
|
1515 if (offset != -1) {
|
|
1516 message.print(" at offset %d", offset);
|
|
1517 }
|
|
1518 }
|
|
1519
|
|
1520 void ClassVerifier::verify_error(u2 offset, const char* fmt, ...) {
|
|
1521 _exception_type = vmSymbols::java_lang_VerifyError();
|
|
1522 va_list va;
|
|
1523 va_start(va, fmt);
|
|
1524 format_error_message(fmt, offset, va);
|
|
1525 va_end(va);
|
|
1526 }
|
|
1527
|
|
1528 void ClassVerifier::verify_error(const char* fmt, ...) {
|
|
1529 _exception_type = vmSymbols::java_lang_VerifyError();
|
|
1530 va_list va;
|
|
1531 va_start(va, fmt);
|
|
1532 format_error_message(fmt, -1, va);
|
|
1533 va_end(va);
|
|
1534 }
|
|
1535
|
|
1536 void ClassVerifier::class_format_error(const char* msg, ...) {
|
|
1537 _exception_type = vmSymbols::java_lang_ClassFormatError();
|
|
1538 va_list va;
|
|
1539 va_start(va, msg);
|
|
1540 format_error_message(msg, -1, va);
|
|
1541 va_end(va);
|
|
1542 }
|
|
1543
|
|
1544 klassOop ClassVerifier::load_class(symbolHandle name, TRAPS) {
|
|
1545 // Get current loader and protection domain first.
|
|
1546 oop loader = current_class()->class_loader();
|
|
1547 oop protection_domain = current_class()->protection_domain();
|
|
1548
|
|
1549 return SystemDictionary::resolve_or_fail(
|
|
1550 name, Handle(THREAD, loader), Handle(THREAD, protection_domain),
|
|
1551 true, CHECK_NULL);
|
|
1552 }
|
|
1553
|
|
1554 bool ClassVerifier::is_protected_access(instanceKlassHandle this_class,
|
|
1555 klassOop target_class,
|
|
1556 symbolOop field_name,
|
|
1557 symbolOop field_sig,
|
|
1558 bool is_method) {
|
|
1559 No_Safepoint_Verifier nosafepoint;
|
|
1560
|
|
1561 // If target class isn't a super class of this class, we don't worry about this case
|
|
1562 if (!this_class->is_subclass_of(target_class)) {
|
|
1563 return false;
|
|
1564 }
|
|
1565 // Check if the specified method or field is protected
|
|
1566 instanceKlass* target_instance = instanceKlass::cast(target_class);
|
|
1567 fieldDescriptor fd;
|
|
1568 if (is_method) {
|
|
1569 methodOop m = target_instance->uncached_lookup_method(field_name, field_sig);
|
|
1570 if (m != NULL && m->is_protected()) {
|
|
1571 if (!this_class->is_same_class_package(m->method_holder())) {
|
|
1572 return true;
|
|
1573 }
|
|
1574 }
|
|
1575 } else {
|
|
1576 klassOop member_klass = target_instance->find_field(field_name, field_sig, &fd);
|
|
1577 if(member_klass != NULL && fd.is_protected()) {
|
|
1578 if (!this_class->is_same_class_package(member_klass)) {
|
|
1579 return true;
|
|
1580 }
|
|
1581 }
|
|
1582 }
|
|
1583 return false;
|
|
1584 }
|
|
1585
|
|
1586 void ClassVerifier::verify_ldc(
|
|
1587 int opcode, u2 index, StackMapFrame *current_frame,
|
|
1588 constantPoolHandle cp, u2 bci, TRAPS) {
|
|
1589 verify_cp_index(cp, index, CHECK_VERIFY(this));
|
|
1590 constantTag tag = cp->tag_at(index);
|
|
1591 unsigned int types;
|
|
1592 if (opcode == Bytecodes::_ldc || opcode == Bytecodes::_ldc_w) {
|
|
1593 if (!tag.is_unresolved_string() && !tag.is_unresolved_klass()) {
|
|
1594 types = (1 << JVM_CONSTANT_Integer) | (1 << JVM_CONSTANT_Float)
|
|
1595 | (1 << JVM_CONSTANT_String) | (1 << JVM_CONSTANT_Class);
|
|
1596 verify_cp_type(index, cp, types, CHECK_VERIFY(this));
|
|
1597 }
|
|
1598 } else {
|
|
1599 assert(opcode == Bytecodes::_ldc2_w, "must be ldc2_w");
|
|
1600 types = (1 << JVM_CONSTANT_Double) | (1 << JVM_CONSTANT_Long);
|
|
1601 verify_cp_type(index, cp, types, CHECK_VERIFY(this));
|
|
1602 }
|
|
1603 if (tag.is_string() || tag.is_unresolved_string()) {
|
|
1604 current_frame->push_stack(
|
|
1605 VerificationType::reference_type(
|
|
1606 vmSymbols::java_lang_String()), CHECK_VERIFY(this));
|
|
1607 } else if (tag.is_klass() || tag.is_unresolved_klass()) {
|
|
1608 current_frame->push_stack(
|
|
1609 VerificationType::reference_type(
|
|
1610 vmSymbols::java_lang_Class()), CHECK_VERIFY(this));
|
|
1611 } else if (tag.is_int()) {
|
|
1612 current_frame->push_stack(
|
|
1613 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1614 } else if (tag.is_float()) {
|
|
1615 current_frame->push_stack(
|
|
1616 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
1617 } else if (tag.is_double()) {
|
|
1618 current_frame->push_stack_2(
|
|
1619 VerificationType::double_type(),
|
|
1620 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
1621 } else if (tag.is_long()) {
|
|
1622 current_frame->push_stack_2(
|
|
1623 VerificationType::long_type(),
|
|
1624 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
1625 } else {
|
|
1626 verify_error(bci, "Invalid index in ldc");
|
|
1627 return;
|
|
1628 }
|
|
1629 }
|
|
1630
|
|
1631 void ClassVerifier::verify_switch(
|
|
1632 RawBytecodeStream* bcs, u4 code_length, char* code_data,
|
|
1633 StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS) {
|
|
1634 int bci = bcs->bci();
|
|
1635 address bcp = bcs->bcp();
|
|
1636 address aligned_bcp = (address) round_to((intptr_t)(bcp + 1), jintSize);
|
|
1637
|
|
1638 // 4639449 & 4647081: padding bytes must be 0
|
|
1639 u2 padding_offset = 1;
|
|
1640 while ((bcp + padding_offset) < aligned_bcp) {
|
|
1641 if(*(bcp + padding_offset) != 0) {
|
|
1642 verify_error(bci, "Nonzero padding byte in lookswitch or tableswitch");
|
|
1643 return;
|
|
1644 }
|
|
1645 padding_offset++;
|
|
1646 }
|
|
1647 int default_offset = (int) Bytes::get_Java_u4(aligned_bcp);
|
|
1648 int keys, delta;
|
|
1649 current_frame->pop_stack(
|
|
1650 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
1651 if (bcs->code() == Bytecodes::_tableswitch) {
|
|
1652 jint low = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize);
|
|
1653 jint high = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize);
|
|
1654 if (low > high) {
|
|
1655 verify_error(bci,
|
|
1656 "low must be less than or equal to high in tableswitch");
|
|
1657 return;
|
|
1658 }
|
|
1659 keys = high - low + 1;
|
|
1660 if (keys < 0) {
|
|
1661 verify_error(bci, "too many keys in tableswitch");
|
|
1662 return;
|
|
1663 }
|
|
1664 delta = 1;
|
|
1665 } else {
|
|
1666 keys = (int)Bytes::get_Java_u4(aligned_bcp + jintSize);
|
|
1667 if (keys < 0) {
|
|
1668 verify_error(bci, "number of keys in lookupswitch less than 0");
|
|
1669 return;
|
|
1670 }
|
|
1671 delta = 2;
|
|
1672 // Make sure that the lookupswitch items are sorted
|
|
1673 for (int i = 0; i < (keys - 1); i++) {
|
|
1674 jint this_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i)*jintSize);
|
|
1675 jint next_key = Bytes::get_Java_u4(aligned_bcp + (2+2*i+2)*jintSize);
|
|
1676 if (this_key >= next_key) {
|
|
1677 verify_error(bci, "Bad lookupswitch instruction");
|
|
1678 return;
|
|
1679 }
|
|
1680 }
|
|
1681 }
|
|
1682 int target = bci + default_offset;
|
|
1683 stackmap_table->check_jump_target(current_frame, target, CHECK_VERIFY(this));
|
|
1684 for (int i = 0; i < keys; i++) {
|
|
1685 target = bci + (jint)Bytes::get_Java_u4(aligned_bcp+(3+i*delta)*jintSize);
|
|
1686 stackmap_table->check_jump_target(
|
|
1687 current_frame, target, CHECK_VERIFY(this));
|
|
1688 }
|
|
1689 }
|
|
1690
|
|
1691 bool ClassVerifier::name_in_supers(
|
|
1692 symbolOop ref_name, instanceKlassHandle current) {
|
|
1693 klassOop super = current->super();
|
|
1694 while (super != NULL) {
|
|
1695 if (super->klass_part()->name() == ref_name) {
|
|
1696 return true;
|
|
1697 }
|
|
1698 super = super->klass_part()->super();
|
|
1699 }
|
|
1700 return false;
|
|
1701 }
|
|
1702
|
|
1703 void ClassVerifier::verify_field_instructions(RawBytecodeStream* bcs,
|
|
1704 StackMapFrame* current_frame,
|
|
1705 constantPoolHandle cp,
|
|
1706 TRAPS) {
|
|
1707 u2 index = bcs->get_index_big();
|
|
1708 verify_cp_type(index, cp, 1 << JVM_CONSTANT_Fieldref, CHECK_VERIFY(this));
|
|
1709
|
|
1710 // Get field name and signature
|
|
1711 symbolHandle field_name = symbolHandle(THREAD, cp->name_ref_at(index));
|
|
1712 symbolHandle field_sig = symbolHandle(THREAD, cp->signature_ref_at(index));
|
|
1713
|
|
1714 if (!SignatureVerifier::is_valid_type_signature(field_sig)) {
|
|
1715 class_format_error(
|
|
1716 "Invalid signature for field in class %s referenced "
|
|
1717 "from constant pool index %d", _klass->external_name(), index);
|
|
1718 return;
|
|
1719 }
|
|
1720
|
|
1721 // Get referenced class type
|
|
1722 VerificationType ref_class_type = cp_ref_index_to_type(
|
|
1723 index, cp, CHECK_VERIFY(this));
|
|
1724 if (!ref_class_type.is_object()) {
|
|
1725 verify_error(
|
|
1726 "Expecting reference to class in class %s at constant pool index %d",
|
|
1727 _klass->external_name(), index);
|
|
1728 return;
|
|
1729 }
|
|
1730 VerificationType target_class_type = ref_class_type;
|
|
1731
|
|
1732 assert(sizeof(VerificationType) == sizeof(uintptr_t),
|
|
1733 "buffer type must match VerificationType size");
|
|
1734 uintptr_t field_type_buffer[2];
|
|
1735 VerificationType* field_type = (VerificationType*)field_type_buffer;
|
|
1736 // If we make a VerificationType[2] array directly, the compiler calls
|
|
1737 // to the c-runtime library to do the allocation instead of just
|
|
1738 // stack allocating it. Plus it would run constructors. This shows up
|
|
1739 // in performance profiles.
|
|
1740
|
|
1741 SignatureStream sig_stream(field_sig, false);
|
|
1742 VerificationType stack_object_type;
|
|
1743 int n = change_sig_to_verificationType(
|
|
1744 &sig_stream, field_type, CHECK_VERIFY(this));
|
|
1745 u2 bci = bcs->bci();
|
|
1746 bool is_assignable;
|
|
1747 switch (bcs->code()) {
|
|
1748 case Bytecodes::_getstatic: {
|
|
1749 for (int i = 0; i < n; i++) {
|
|
1750 current_frame->push_stack(field_type[i], CHECK_VERIFY(this));
|
|
1751 }
|
|
1752 break;
|
|
1753 }
|
|
1754 case Bytecodes::_putstatic: {
|
|
1755 for (int i = n - 1; i >= 0; i--) {
|
|
1756 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this));
|
|
1757 }
|
|
1758 break;
|
|
1759 }
|
|
1760 case Bytecodes::_getfield: {
|
|
1761 stack_object_type = current_frame->pop_stack(
|
|
1762 target_class_type, CHECK_VERIFY(this));
|
|
1763 for (int i = 0; i < n; i++) {
|
|
1764 current_frame->push_stack(field_type[i], CHECK_VERIFY(this));
|
|
1765 }
|
|
1766 goto check_protected;
|
|
1767 }
|
|
1768 case Bytecodes::_putfield: {
|
|
1769 for (int i = n - 1; i >= 0; i--) {
|
|
1770 current_frame->pop_stack(field_type[i], CHECK_VERIFY(this));
|
|
1771 }
|
|
1772 stack_object_type = current_frame->pop_stack(CHECK_VERIFY(this));
|
|
1773
|
|
1774 // The JVMS 2nd edition allows field initialization before the superclass
|
|
1775 // initializer, if the field is defined within the current class.
|
|
1776 fieldDescriptor fd;
|
|
1777 if (stack_object_type == VerificationType::uninitialized_this_type() &&
|
|
1778 target_class_type.equals(current_type()) &&
|
|
1779 _klass->find_local_field(field_name(), field_sig(), &fd)) {
|
|
1780 stack_object_type = current_type();
|
|
1781 }
|
|
1782 is_assignable = target_class_type.is_assignable_from(
|
|
1783 stack_object_type, current_class(), CHECK_VERIFY(this));
|
|
1784 if (!is_assignable) {
|
|
1785 verify_error(bci, "Bad type on operand stack in putfield");
|
|
1786 return;
|
|
1787 }
|
|
1788 }
|
|
1789 check_protected: {
|
|
1790 if (_this_type == stack_object_type)
|
|
1791 break; // stack_object_type must be assignable to _current_class_type
|
|
1792 symbolHandle ref_class_name = symbolHandle(THREAD,
|
|
1793 cp->klass_name_at(cp->klass_ref_index_at(index)));
|
|
1794 if (!name_in_supers(ref_class_name(), current_class()))
|
|
1795 // stack_object_type must be assignable to _current_class_type since:
|
|
1796 // 1. stack_object_type must be assignable to ref_class.
|
|
1797 // 2. ref_class must be _current_class or a subclass of it. It can't
|
|
1798 // be a superclass of it. See revised JVMS 5.4.4.
|
|
1799 break;
|
|
1800
|
|
1801 klassOop ref_class_oop = load_class(ref_class_name, CHECK);
|
|
1802 if (is_protected_access(current_class(), ref_class_oop, field_name(),
|
|
1803 field_sig(), false)) {
|
|
1804 // It's protected access, check if stack object is assignable to
|
|
1805 // current class.
|
|
1806 is_assignable = current_type().is_assignable_from(
|
|
1807 stack_object_type, current_class(), CHECK_VERIFY(this));
|
|
1808 if (!is_assignable) {
|
|
1809 verify_error(bci, "Bad access to protected data in getfield");
|
|
1810 return;
|
|
1811 }
|
|
1812 }
|
|
1813 break;
|
|
1814 }
|
|
1815 default: ShouldNotReachHere();
|
|
1816 }
|
|
1817 }
|
|
1818
|
|
1819 void ClassVerifier::verify_invoke_init(
|
|
1820 RawBytecodeStream* bcs, VerificationType ref_class_type,
|
|
1821 StackMapFrame* current_frame, u4 code_length, bool *this_uninit,
|
|
1822 constantPoolHandle cp, TRAPS) {
|
|
1823 u2 bci = bcs->bci();
|
|
1824 VerificationType type = current_frame->pop_stack(
|
|
1825 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
1826 if (type == VerificationType::uninitialized_this_type()) {
|
|
1827 // The method must be an <init> method of either this class, or one of its
|
|
1828 // superclasses
|
|
1829 klassOop oop = current_class()();
|
|
1830 Klass* klass = oop->klass_part();
|
|
1831 while (klass != NULL && ref_class_type.name() != klass->name()) {
|
|
1832 klass = klass->super()->klass_part();
|
|
1833 }
|
|
1834 if (klass == NULL) {
|
|
1835 verify_error(bci, "Bad <init> method call");
|
|
1836 return;
|
|
1837 }
|
|
1838 current_frame->initialize_object(type, current_type());
|
|
1839 *this_uninit = true;
|
|
1840 } else if (type.is_uninitialized()) {
|
|
1841 u2 new_offset = type.bci();
|
|
1842 address new_bcp = bcs->bcp() - bci + new_offset;
|
|
1843 if (new_offset > (code_length - 3) || (*new_bcp) != Bytecodes::_new) {
|
|
1844 verify_error(new_offset, "Expecting new instruction");
|
|
1845 return;
|
|
1846 }
|
|
1847 u2 new_class_index = Bytes::get_Java_u2(new_bcp + 1);
|
|
1848 verify_cp_class_type(new_class_index, cp, CHECK_VERIFY(this));
|
|
1849
|
|
1850 // The method must be an <init> method of the indicated class
|
|
1851 VerificationType new_class_type = cp_index_to_type(
|
|
1852 new_class_index, cp, CHECK_VERIFY(this));
|
|
1853 if (!new_class_type.equals(ref_class_type)) {
|
|
1854 verify_error(bci, "Call to wrong <init> method");
|
|
1855 return;
|
|
1856 }
|
|
1857 // According to the VM spec, if the referent class is a superclass of the
|
|
1858 // current class, and is in a different runtime package, and the method is
|
|
1859 // protected, then the objectref must be the current class or a subclass
|
|
1860 // of the current class.
|
|
1861 VerificationType objectref_type = new_class_type;
|
|
1862 if (name_in_supers(ref_class_type.name(), current_class())) {
|
|
1863 klassOop ref_klass = load_class(
|
|
1864 ref_class_type.name(), CHECK_VERIFY(this));
|
|
1865 methodOop m = instanceKlass::cast(ref_klass)->uncached_lookup_method(
|
|
1866 vmSymbols::object_initializer_name(),
|
|
1867 cp->signature_ref_at(bcs->get_index_big()));
|
|
1868 instanceKlassHandle mh(THREAD, m->method_holder());
|
|
1869 if (m->is_protected() && !mh->is_same_class_package(_klass())) {
|
|
1870 bool assignable = current_type().is_assignable_from(
|
|
1871 objectref_type, current_class(), CHECK_VERIFY(this));
|
|
1872 if (!assignable) {
|
|
1873 verify_error(bci, "Bad access to protected <init> method");
|
|
1874 return;
|
|
1875 }
|
|
1876 }
|
|
1877 }
|
|
1878 current_frame->initialize_object(type, new_class_type);
|
|
1879 } else {
|
|
1880 verify_error(bci, "Bad operand type when invoking <init>");
|
|
1881 return;
|
|
1882 }
|
|
1883 }
|
|
1884
|
|
1885 void ClassVerifier::verify_invoke_instructions(
|
|
1886 RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame,
|
|
1887 bool *this_uninit, VerificationType return_type,
|
|
1888 constantPoolHandle cp, TRAPS) {
|
|
1889 // Make sure the constant pool item is the right type
|
|
1890 u2 index = bcs->get_index_big();
|
|
1891 Bytecodes::Code opcode = bcs->code();
|
|
1892 unsigned int types = (opcode == Bytecodes::_invokeinterface
|
|
1893 ? 1 << JVM_CONSTANT_InterfaceMethodref
|
|
1894 : 1 << JVM_CONSTANT_Methodref);
|
|
1895 verify_cp_type(index, cp, types, CHECK_VERIFY(this));
|
|
1896
|
|
1897 // Get method name and signature
|
|
1898 symbolHandle method_name(THREAD, cp->name_ref_at(index));
|
|
1899 symbolHandle method_sig(THREAD, cp->signature_ref_at(index));
|
|
1900
|
|
1901 if (!SignatureVerifier::is_valid_method_signature(method_sig)) {
|
|
1902 class_format_error(
|
|
1903 "Invalid method signature in class %s referenced "
|
|
1904 "from constant pool index %d", _klass->external_name(), index);
|
|
1905 return;
|
|
1906 }
|
|
1907
|
|
1908 // Get referenced class type
|
|
1909 VerificationType ref_class_type = cp_ref_index_to_type(
|
|
1910 index, cp, CHECK_VERIFY(this));
|
|
1911
|
|
1912 // For a small signature length, we just allocate 128 bytes instead
|
|
1913 // of parsing the signature once to find its size.
|
|
1914 // -3 is for '(', ')' and return descriptor; multiply by 2 is for
|
|
1915 // longs/doubles to be consertive.
|
|
1916 assert(sizeof(VerificationType) == sizeof(uintptr_t),
|
|
1917 "buffer type must match VerificationType size");
|
|
1918 uintptr_t on_stack_sig_types_buffer[128];
|
|
1919 // If we make a VerificationType[128] array directly, the compiler calls
|
|
1920 // to the c-runtime library to do the allocation instead of just
|
|
1921 // stack allocating it. Plus it would run constructors. This shows up
|
|
1922 // in performance profiles.
|
|
1923
|
|
1924 VerificationType* sig_types;
|
|
1925 int size = (method_sig->utf8_length() - 3) * 2;
|
|
1926 if (size > 128) {
|
|
1927 // Long and double occupies two slots here.
|
|
1928 ArgumentSizeComputer size_it(method_sig);
|
|
1929 size = size_it.size();
|
|
1930 sig_types = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, VerificationType, size);
|
|
1931 } else{
|
|
1932 sig_types = (VerificationType*)on_stack_sig_types_buffer;
|
|
1933 }
|
|
1934 SignatureStream sig_stream(method_sig);
|
|
1935 int sig_i = 0;
|
|
1936 while (!sig_stream.at_return_type()) {
|
|
1937 sig_i += change_sig_to_verificationType(
|
|
1938 &sig_stream, &sig_types[sig_i], CHECK_VERIFY(this));
|
|
1939 sig_stream.next();
|
|
1940 }
|
|
1941 int nargs = sig_i;
|
|
1942
|
|
1943 #ifdef ASSERT
|
|
1944 {
|
|
1945 ArgumentSizeComputer size_it(method_sig);
|
|
1946 assert(nargs == size_it.size(), "Argument sizes do not match");
|
|
1947 assert(nargs <= (method_sig->utf8_length() - 3) * 2, "estimate of max size isn't conservative enough");
|
|
1948 }
|
|
1949 #endif
|
|
1950
|
|
1951 // Check instruction operands
|
|
1952 u2 bci = bcs->bci();
|
|
1953 if (opcode == Bytecodes::_invokeinterface) {
|
|
1954 address bcp = bcs->bcp();
|
|
1955 // 4905268: count operand in invokeinterface should be nargs+1, not nargs.
|
|
1956 // JSR202 spec: The count operand of an invokeinterface instruction is valid if it is
|
|
1957 // the difference between the size of the operand stack before and after the instruction
|
|
1958 // executes.
|
|
1959 if (*(bcp+3) != (nargs+1)) {
|
|
1960 verify_error(bci, "Inconsistent args count operand in invokeinterface");
|
|
1961 return;
|
|
1962 }
|
|
1963 if (*(bcp+4) != 0) {
|
|
1964 verify_error(bci, "Fourth operand byte of invokeinterface must be zero");
|
|
1965 return;
|
|
1966 }
|
|
1967 }
|
|
1968
|
|
1969 if (method_name->byte_at(0) == '<') {
|
|
1970 // Make sure <init> can only be invoked by invokespecial
|
|
1971 if (opcode != Bytecodes::_invokespecial ||
|
|
1972 method_name() != vmSymbols::object_initializer_name()) {
|
|
1973 verify_error(bci, "Illegal call to internal method");
|
|
1974 return;
|
|
1975 }
|
|
1976 } else if (opcode == Bytecodes::_invokespecial
|
|
1977 && !ref_class_type.equals(current_type())
|
|
1978 && !ref_class_type.equals(VerificationType::reference_type(
|
|
1979 current_class()->super()->klass_part()->name()))) {
|
|
1980 bool subtype = ref_class_type.is_assignable_from(
|
|
1981 current_type(), current_class(), CHECK_VERIFY(this));
|
|
1982 if (!subtype) {
|
|
1983 verify_error(bci, "Bad invokespecial instruction: "
|
|
1984 "current class isn't assignable to reference class.");
|
|
1985 return;
|
|
1986 }
|
|
1987 }
|
|
1988 // Match method descriptor with operand stack
|
|
1989 for (int i = nargs - 1; i >= 0; i--) { // Run backwards
|
|
1990 current_frame->pop_stack(sig_types[i], CHECK_VERIFY(this));
|
|
1991 }
|
|
1992 // Check objectref on operand stack
|
|
1993 if (opcode != Bytecodes::_invokestatic) {
|
|
1994 if (method_name() == vmSymbols::object_initializer_name()) { // <init> method
|
|
1995 verify_invoke_init(bcs, ref_class_type, current_frame,
|
|
1996 code_length, this_uninit, cp, CHECK_VERIFY(this));
|
|
1997 } else { // other methods
|
|
1998 // Ensures that target class is assignable to method class.
|
|
1999 if (opcode == Bytecodes::_invokespecial) {
|
|
2000 current_frame->pop_stack(current_type(), CHECK_VERIFY(this));
|
|
2001 } else if (opcode == Bytecodes::_invokevirtual) {
|
|
2002 VerificationType stack_object_type =
|
|
2003 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this));
|
|
2004 if (current_type() != stack_object_type) {
|
|
2005 assert(cp->cache() == NULL, "not rewritten yet");
|
|
2006 symbolHandle ref_class_name = symbolHandle(THREAD,
|
|
2007 cp->klass_name_at(cp->klass_ref_index_at(index)));
|
|
2008 // See the comments in verify_field_instructions() for
|
|
2009 // the rationale behind this.
|
|
2010 if (name_in_supers(ref_class_name(), current_class())) {
|
|
2011 klassOop ref_class = load_class(ref_class_name, CHECK);
|
|
2012 if (is_protected_access(
|
|
2013 _klass, ref_class, method_name(), method_sig(), true)) {
|
|
2014 // It's protected access, check if stack object is
|
|
2015 // assignable to current class.
|
|
2016 bool is_assignable = current_type().is_assignable_from(
|
|
2017 stack_object_type, current_class(), CHECK_VERIFY(this));
|
|
2018 if (!is_assignable) {
|
|
2019 if (ref_class_type.name() == vmSymbols::java_lang_Object()
|
|
2020 && stack_object_type.is_array()
|
|
2021 && method_name() == vmSymbols::clone_name()) {
|
|
2022 // Special case: arrays pretend to implement public Object
|
|
2023 // clone().
|
|
2024 } else {
|
|
2025 verify_error(bci,
|
|
2026 "Bad access to protected data in invokevirtual");
|
|
2027 return;
|
|
2028 }
|
|
2029 }
|
|
2030 }
|
|
2031 }
|
|
2032 }
|
|
2033 } else {
|
|
2034 assert(opcode == Bytecodes::_invokeinterface, "Unexpected opcode encountered");
|
|
2035 current_frame->pop_stack(ref_class_type, CHECK_VERIFY(this));
|
|
2036 }
|
|
2037 }
|
|
2038 }
|
|
2039 // Push the result type.
|
|
2040 if (sig_stream.type() != T_VOID) {
|
|
2041 if (method_name() == vmSymbols::object_initializer_name()) {
|
|
2042 // <init> method must have a void return type
|
|
2043 verify_error(bci, "Return type must be void in <init> method");
|
|
2044 return;
|
|
2045 }
|
|
2046 VerificationType return_type[2];
|
|
2047 int n = change_sig_to_verificationType(
|
|
2048 &sig_stream, return_type, CHECK_VERIFY(this));
|
|
2049 for (int i = 0; i < n; i++) {
|
|
2050 current_frame->push_stack(return_type[i], CHECK_VERIFY(this)); // push types backwards
|
|
2051 }
|
|
2052 }
|
|
2053 }
|
|
2054
|
|
2055 VerificationType ClassVerifier::get_newarray_type(
|
|
2056 u2 index, u2 bci, TRAPS) {
|
|
2057 const char* from_bt[] = {
|
|
2058 NULL, NULL, NULL, NULL, "[Z", "[C", "[F", "[D", "[B", "[S", "[I", "[J",
|
|
2059 };
|
|
2060 if (index < T_BOOLEAN || index > T_LONG) {
|
|
2061 verify_error(bci, "Illegal newarray instruction");
|
|
2062 return VerificationType::bogus_type();
|
|
2063 }
|
|
2064
|
|
2065 // from_bt[index] contains the array signature which has a length of 2
|
|
2066 symbolHandle sig = oopFactory::new_symbol_handle(
|
|
2067 from_bt[index], 2, CHECK_(VerificationType::bogus_type()));
|
|
2068 return VerificationType::reference_type(sig);
|
|
2069 }
|
|
2070
|
|
2071 void ClassVerifier::verify_anewarray(
|
|
2072 u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS) {
|
|
2073 verify_cp_class_type(index, cp, CHECK_VERIFY(this));
|
|
2074 current_frame->pop_stack(
|
|
2075 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2076
|
|
2077 VerificationType component_type =
|
|
2078 cp_index_to_type(index, cp, CHECK_VERIFY(this));
|
|
2079 ResourceMark rm(THREAD);
|
|
2080 int length;
|
|
2081 char* arr_sig_str;
|
|
2082 if (component_type.is_array()) { // it's an array
|
|
2083 const char* component_name = component_type.name()->as_utf8();
|
|
2084 // add one dimension to component
|
|
2085 length = (int)strlen(component_name) + 1;
|
|
2086 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length);
|
|
2087 arr_sig_str[0] = '[';
|
|
2088 strncpy(&arr_sig_str[1], component_name, length - 1);
|
|
2089 } else { // it's an object or interface
|
|
2090 const char* component_name = component_type.name()->as_utf8();
|
|
2091 // add one dimension to component with 'L' prepended and ';' postpended.
|
|
2092 length = (int)strlen(component_name) + 3;
|
|
2093 arr_sig_str = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, length);
|
|
2094 arr_sig_str[0] = '[';
|
|
2095 arr_sig_str[1] = 'L';
|
|
2096 strncpy(&arr_sig_str[2], component_name, length - 2);
|
|
2097 arr_sig_str[length - 1] = ';';
|
|
2098 }
|
|
2099 symbolHandle arr_sig = oopFactory::new_symbol_handle(
|
|
2100 arr_sig_str, length, CHECK_VERIFY(this));
|
|
2101 VerificationType new_array_type = VerificationType::reference_type(arr_sig);
|
|
2102 current_frame->push_stack(new_array_type, CHECK_VERIFY(this));
|
|
2103 }
|
|
2104
|
|
2105 void ClassVerifier::verify_iload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2106 current_frame->get_local(
|
|
2107 index, VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2108 current_frame->push_stack(
|
|
2109 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2110 }
|
|
2111
|
|
2112 void ClassVerifier::verify_lload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2113 current_frame->get_local_2(
|
|
2114 index, VerificationType::long_type(),
|
|
2115 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
2116 current_frame->push_stack_2(
|
|
2117 VerificationType::long_type(),
|
|
2118 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
2119 }
|
|
2120
|
|
2121 void ClassVerifier::verify_fload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2122 current_frame->get_local(
|
|
2123 index, VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2124 current_frame->push_stack(
|
|
2125 VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2126 }
|
|
2127
|
|
2128 void ClassVerifier::verify_dload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2129 current_frame->get_local_2(
|
|
2130 index, VerificationType::double_type(),
|
|
2131 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
2132 current_frame->push_stack_2(
|
|
2133 VerificationType::double_type(),
|
|
2134 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
2135 }
|
|
2136
|
|
2137 void ClassVerifier::verify_aload(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2138 VerificationType type = current_frame->get_local(
|
|
2139 index, VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
2140 current_frame->push_stack(type, CHECK_VERIFY(this));
|
|
2141 }
|
|
2142
|
|
2143 void ClassVerifier::verify_istore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2144 current_frame->pop_stack(
|
|
2145 VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2146 current_frame->set_local(
|
|
2147 index, VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2148 }
|
|
2149
|
|
2150 void ClassVerifier::verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2151 current_frame->pop_stack_2(
|
|
2152 VerificationType::long2_type(),
|
|
2153 VerificationType::long_type(), CHECK_VERIFY(this));
|
|
2154 current_frame->set_local_2(
|
|
2155 index, VerificationType::long_type(),
|
|
2156 VerificationType::long2_type(), CHECK_VERIFY(this));
|
|
2157 }
|
|
2158
|
|
2159 void ClassVerifier::verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2160 current_frame->pop_stack(VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2161 current_frame->set_local(
|
|
2162 index, VerificationType::float_type(), CHECK_VERIFY(this));
|
|
2163 }
|
|
2164
|
|
2165 void ClassVerifier::verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2166 current_frame->pop_stack_2(
|
|
2167 VerificationType::double2_type(),
|
|
2168 VerificationType::double_type(), CHECK_VERIFY(this));
|
|
2169 current_frame->set_local_2(
|
|
2170 index, VerificationType::double_type(),
|
|
2171 VerificationType::double2_type(), CHECK_VERIFY(this));
|
|
2172 }
|
|
2173
|
|
2174 void ClassVerifier::verify_astore(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2175 VerificationType type = current_frame->pop_stack(
|
|
2176 VerificationType::reference_check(), CHECK_VERIFY(this));
|
|
2177 current_frame->set_local(index, type, CHECK_VERIFY(this));
|
|
2178 }
|
|
2179
|
|
2180 void ClassVerifier::verify_iinc(u2 index, StackMapFrame* current_frame, TRAPS) {
|
|
2181 VerificationType type = current_frame->get_local(
|
|
2182 index, VerificationType::integer_type(), CHECK_VERIFY(this));
|
|
2183 current_frame->set_local(index, type, CHECK_VERIFY(this));
|
|
2184 }
|
|
2185
|
|
2186 void ClassVerifier::verify_return_value(
|
|
2187 VerificationType return_type, VerificationType type, u2 bci, TRAPS) {
|
|
2188 if (return_type == VerificationType::bogus_type()) {
|
|
2189 verify_error(bci, "Method expects a return value");
|
|
2190 return;
|
|
2191 }
|
|
2192 bool match = return_type.is_assignable_from(type, _klass, CHECK_VERIFY(this));
|
|
2193 if (!match) {
|
|
2194 verify_error(bci, "Bad return type");
|
|
2195 return;
|
|
2196 }
|
|
2197 }
|