Mercurial > hg > graal-compiler
annotate src/share/vm/prims/nativeLookup.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | 4ce7240d622c |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
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20 * or visit www.oracle.com if you need additional information or have any |
|
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_nativeLookup.cpp.incl" | |
| 27 | |
| 28 | |
| 29 static void mangle_name_on(outputStream* st, symbolOop name, int begin, int end) { | |
| 30 char* bytes = (char*)name->bytes() + begin; | |
| 31 char* end_bytes = (char*)name->bytes() + end; | |
| 32 while (bytes < end_bytes) { | |
| 33 jchar c; | |
| 34 bytes = UTF8::next(bytes, &c); | |
| 35 if (c <= 0x7f && isalnum(c)) { | |
| 36 st->put((char) c); | |
| 37 } else { | |
| 38 if (c == '_') st->print("_1"); | |
| 39 else if (c == '/') st->print("_"); | |
| 40 else if (c == ';') st->print("_2"); | |
| 41 else if (c == '[') st->print("_3"); | |
| 42 else st->print("_%.5x", c); | |
| 43 } | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 | |
| 48 static void mangle_name_on(outputStream* st, symbolOop name) { | |
| 49 mangle_name_on(st, name, 0, name->utf8_length()); | |
| 50 } | |
| 51 | |
| 52 | |
| 53 char* NativeLookup::pure_jni_name(methodHandle method) { | |
| 54 stringStream st; | |
| 55 // Prefix | |
| 56 st.print("Java_"); | |
| 57 // Klass name | |
| 58 mangle_name_on(&st, method->klass_name()); | |
| 59 st.print("_"); | |
| 60 // Method name | |
| 61 mangle_name_on(&st, method->name()); | |
| 62 return st.as_string(); | |
| 63 } | |
| 64 | |
| 65 | |
| 66 char* NativeLookup::long_jni_name(methodHandle method) { | |
| 67 // Signature ignore the wrapping parenteses and the trailing return type | |
| 68 stringStream st; | |
| 69 symbolOop signature = method->signature(); | |
| 70 st.print("__"); | |
| 71 // find ')' | |
| 72 int end; | |
| 73 for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++); | |
| 74 // skip first '(' | |
| 75 mangle_name_on(&st, signature, 1, end); | |
| 76 return st.as_string(); | |
| 77 } | |
| 78 | |
| 79 extern "C" { | |
| 80 void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls); | |
| 710 | 81 void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls); |
| 0 | 82 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass); |
| 83 } | |
| 84 | |
| 85 static address lookup_special_native(char* jni_name) { | |
| 86 // NB: To ignore the jni prefix and jni postfix strstr is used matching. | |
| 87 if (!JDK_Version::is_gte_jdk14x_version()) { | |
| 88 // These functions only exist for compatibility with 1.3.1 and earlier | |
| 89 // Intercept ObjectOutputStream getPrimitiveFieldValues for faster serialization | |
| 90 if (strstr(jni_name, "Java_java_io_ObjectOutputStream_getPrimitiveFieldValues") != NULL) { | |
| 91 return CAST_FROM_FN_PTR(address, JVM_GetPrimitiveFieldValues); | |
| 92 } | |
| 93 // Intercept ObjectInputStream setPrimitiveFieldValues for faster serialization | |
| 94 if (strstr(jni_name, "Java_java_io_ObjectInputStream_setPrimitiveFieldValues") != NULL) { | |
| 95 return CAST_FROM_FN_PTR(address, JVM_SetPrimitiveFieldValues); | |
| 96 } | |
| 97 } | |
| 98 if (strstr(jni_name, "Java_sun_misc_Unsafe_registerNatives") != NULL) { | |
| 99 return CAST_FROM_FN_PTR(address, JVM_RegisterUnsafeMethods); | |
| 100 } | |
| 710 | 101 if (strstr(jni_name, "Java_sun_dyn_MethodHandleNatives_registerNatives") != NULL) { |
| 102 return CAST_FROM_FN_PTR(address, JVM_RegisterMethodHandleMethods); | |
| 103 } | |
| 0 | 104 if (strstr(jni_name, "Java_sun_misc_Perf_registerNatives") != NULL) { |
| 105 return CAST_FROM_FN_PTR(address, JVM_RegisterPerfMethods); | |
| 106 } | |
| 107 | |
| 108 return NULL; | |
| 109 } | |
| 110 | |
| 111 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) { | |
| 112 address entry; | |
| 113 // Compute complete JNI name for style | |
| 114 stringStream st; | |
| 115 if (os_style) os::print_jni_name_prefix_on(&st, args_size); | |
| 116 st.print_raw(pure_name); | |
| 117 st.print_raw(long_name); | |
| 118 if (os_style) os::print_jni_name_suffix_on(&st, args_size); | |
| 119 char* jni_name = st.as_string(); | |
| 120 | |
| 121 // If the loader is null we have a system class, so we attempt a lookup in | |
| 122 // the native Java library. This takes care of any bootstrapping problems. | |
| 123 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find | |
| 124 // gets found the first time around - otherwise an infinite loop can occure. This is | |
| 125 // another VM/library dependency | |
| 126 Handle loader(THREAD, | |
| 127 instanceKlass::cast(method->method_holder())->class_loader()); | |
| 128 if (loader.is_null()) { | |
| 129 entry = lookup_special_native(jni_name); | |
| 130 if (entry == NULL) { | |
| 131 entry = (address) hpi::dll_lookup(os::native_java_library(), jni_name); | |
| 132 } | |
| 133 if (entry != NULL) { | |
| 134 in_base_library = true; | |
| 135 return entry; | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 // Otherwise call static method findNative in ClassLoader | |
| 1142 | 140 KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass()); |
| 0 | 141 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL); |
| 142 | |
| 143 JavaValue result(T_LONG); | |
| 144 JavaCalls::call_static(&result, | |
| 145 klass, | |
| 146 vmSymbolHandles::findNative_name(), | |
| 147 vmSymbolHandles::classloader_string_long_signature(), | |
| 148 // Arguments | |
| 149 loader, | |
| 150 name_arg, | |
| 151 CHECK_NULL); | |
| 152 entry = (address) (intptr_t) result.get_jlong(); | |
| 153 | |
| 154 if (entry == NULL) { | |
| 155 // findNative didn't find it, if there are any agent libraries look in them | |
| 156 AgentLibrary* agent; | |
| 157 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
| 158 entry = (address) hpi::dll_lookup(agent->os_lib(), jni_name); | |
| 159 if (entry != NULL) { | |
| 160 return entry; | |
| 161 } | |
| 162 } | |
| 163 } | |
| 164 | |
| 165 return entry; | |
| 166 } | |
| 167 | |
| 168 | |
| 169 // Check all the formats of native implementation name to see if there is one | |
| 170 // for the specified method. | |
| 171 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) { | |
| 172 address entry = NULL; | |
| 173 in_base_library = false; | |
| 174 // Compute pure name | |
| 175 char* pure_name = pure_jni_name(method); | |
| 176 | |
| 177 // Compute argument size | |
| 178 int args_size = 1 // JNIEnv | |
| 179 + (method->is_static() ? 1 : 0) // class for static methods | |
| 180 + method->size_of_parameters(); // actual parameters | |
| 181 | |
| 182 | |
| 183 // 1) Try JNI short style | |
| 184 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL); | |
| 185 if (entry != NULL) return entry; | |
| 186 | |
| 187 // Compute long name | |
| 188 char* long_name = long_jni_name(method); | |
| 189 | |
| 190 // 2) Try JNI long style | |
| 191 entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL); | |
| 192 if (entry != NULL) return entry; | |
| 193 | |
| 194 // 3) Try JNI short style without os prefix/suffix | |
| 195 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL); | |
| 196 if (entry != NULL) return entry; | |
| 197 | |
| 198 // 4) Try JNI long style without os prefix/suffix | |
| 199 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL); | |
| 200 | |
| 201 return entry; // NULL indicates not found | |
| 202 } | |
| 203 | |
| 204 // Check if there are any JVM TI prefixes which have been applied to the native method name. | |
| 205 // If any are found, remove them before attemping the look up of the | |
| 206 // native implementation again. | |
| 207 // See SetNativeMethodPrefix in the JVM TI Spec for more details. | |
| 208 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) { | |
| 209 ResourceMark rm(THREAD); | |
| 210 | |
| 211 int prefix_count; | |
| 212 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
| 213 char* in_name = method->name()->as_C_string(); | |
| 214 char* wrapper_name = in_name; | |
| 215 // last applied prefix will be first -- go backwards | |
| 216 for (int i = prefix_count-1; i >= 0; i--) { | |
| 217 char* prefix = prefixes[i]; | |
| 218 size_t prefix_len = strlen(prefix); | |
| 219 if (strncmp(prefix, wrapper_name, prefix_len) == 0) { | |
| 220 // has this prefix remove it | |
| 221 wrapper_name += prefix_len; | |
| 222 } | |
| 223 } | |
| 224 if (wrapper_name != in_name) { | |
| 225 // we have a name for a wrapping method | |
| 226 int wrapper_name_len = (int)strlen(wrapper_name); | |
| 227 symbolHandle wrapper_symbol(THREAD, SymbolTable::probe(wrapper_name, wrapper_name_len)); | |
| 228 if (!wrapper_symbol.is_null()) { | |
| 229 KlassHandle kh(method->method_holder()); | |
| 230 methodOop wrapper_method = Klass::cast(kh())->lookup_method(wrapper_symbol(), | |
| 231 method->signature()); | |
| 232 if (wrapper_method != NULL && !wrapper_method->is_native()) { | |
| 233 // we found a wrapper method, use its native entry | |
| 234 method->set_is_prefixed_native(); | |
| 235 return lookup_entry(wrapper_method, in_base_library, THREAD); | |
| 236 } | |
| 237 } | |
| 238 } | |
| 239 return NULL; | |
| 240 } | |
| 241 | |
| 242 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) { | |
| 243 address entry = NULL; | |
| 244 ResourceMark rm(THREAD); | |
| 245 | |
| 246 entry = lookup_entry(method, in_base_library, THREAD); | |
| 247 if (entry != NULL) return entry; | |
| 248 | |
| 249 // standard native method resolution has failed. Check if there are any | |
| 250 // JVM TI prefixes which have been applied to the native method name. | |
| 251 entry = lookup_entry_prefixed(method, in_base_library, THREAD); | |
| 252 if (entry != NULL) return entry; | |
| 253 | |
| 254 // Native function not found, throw UnsatisfiedLinkError | |
| 255 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(), | |
| 256 method->name_and_sig_as_C_string()); | |
| 257 } | |
| 258 | |
| 259 | |
| 260 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) { | |
| 261 if (!method->has_native_function()) { | |
| 262 address entry = lookup_base(method, in_base_library, CHECK_NULL); | |
| 263 method->set_native_function(entry, | |
| 264 methodOopDesc::native_bind_event_is_interesting); | |
| 265 // -verbose:jni printing | |
| 266 if (PrintJNIResolving) { | |
| 267 ResourceMark rm(THREAD); | |
| 268 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]", | |
| 269 Klass::cast(method->method_holder())->external_name(), | |
| 270 method->name()->as_C_string()); | |
| 271 } | |
| 272 } | |
| 273 return method->native_function(); | |
| 274 } | |
| 275 | |
| 276 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) { | |
| 277 EXCEPTION_MARK; | |
| 278 bool in_base_library = true; // SharedRuntime inits some math methods. | |
| 279 symbolHandle c_name = oopFactory::new_symbol_handle(class_name, CATCH); | |
| 280 symbolHandle m_name = oopFactory::new_symbol_handle(method_name, CATCH); | |
| 281 symbolHandle s_name = oopFactory::new_symbol_handle(signature, CATCH); | |
| 282 | |
| 283 // Find the class | |
| 284 klassOop k = SystemDictionary::resolve_or_fail(c_name, true, CATCH); | |
| 285 instanceKlassHandle klass (THREAD, k); | |
| 286 | |
| 287 // Find method and invoke standard lookup | |
| 288 methodHandle method (THREAD, | |
| 289 klass->uncached_lookup_method(m_name(), s_name())); | |
| 290 address result = lookup(method, in_base_library, CATCH); | |
| 291 assert(in_base_library, "must be in basic library"); | |
| 292 guarantee(result != NULL, "must be non NULL"); | |
| 293 return result; | |
| 294 } |