Mercurial > hg > graal-compiler
annotate src/share/vm/prims/nativeLookup.cpp @ 2357:8033953d67ff
7012648: move JSR 292 to package java.lang.invoke and adjust names
Summary: package and class renaming only; delete unused methods and classes
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Fri, 11 Mar 2011 22:34:57 -0800 |
| parents | 72dee110246f |
| children | ed69575596ac |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "classfile/systemDictionary.hpp" | |
| 28 #include "classfile/vmSymbols.hpp" | |
| 29 #include "memory/oopFactory.hpp" | |
| 30 #include "memory/resourceArea.hpp" | |
| 31 #include "memory/universe.inline.hpp" | |
| 32 #include "oops/instanceKlass.hpp" | |
| 33 #include "oops/methodOop.hpp" | |
| 34 #include "oops/oop.inline.hpp" | |
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35 #include "oops/symbol.hpp" |
| 1972 | 36 #include "prims/jvm_misc.hpp" |
| 37 #include "prims/nativeLookup.hpp" | |
| 38 #include "runtime/arguments.hpp" | |
| 39 #include "runtime/handles.inline.hpp" | |
| 40 #include "runtime/javaCalls.hpp" | |
| 41 #include "runtime/sharedRuntime.hpp" | |
| 42 #include "runtime/signature.hpp" | |
| 43 #ifdef TARGET_OS_FAMILY_linux | |
| 44 # include "os_linux.inline.hpp" | |
| 45 #endif | |
| 46 #ifdef TARGET_OS_FAMILY_solaris | |
| 47 # include "os_solaris.inline.hpp" | |
| 48 #endif | |
| 49 #ifdef TARGET_OS_FAMILY_windows | |
| 50 # include "os_windows.inline.hpp" | |
| 51 #endif | |
| 0 | 52 |
| 53 | |
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54 static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) { |
| 0 | 55 char* bytes = (char*)name->bytes() + begin; |
| 56 char* end_bytes = (char*)name->bytes() + end; | |
| 57 while (bytes < end_bytes) { | |
| 58 jchar c; | |
| 59 bytes = UTF8::next(bytes, &c); | |
| 60 if (c <= 0x7f && isalnum(c)) { | |
| 61 st->put((char) c); | |
| 62 } else { | |
| 63 if (c == '_') st->print("_1"); | |
| 64 else if (c == '/') st->print("_"); | |
| 65 else if (c == ';') st->print("_2"); | |
| 66 else if (c == '[') st->print("_3"); | |
| 67 else st->print("_%.5x", c); | |
| 68 } | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 | |
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73 static void mangle_name_on(outputStream* st, Symbol* name) { |
| 0 | 74 mangle_name_on(st, name, 0, name->utf8_length()); |
| 75 } | |
| 76 | |
| 77 | |
| 78 char* NativeLookup::pure_jni_name(methodHandle method) { | |
| 79 stringStream st; | |
| 80 // Prefix | |
| 81 st.print("Java_"); | |
| 82 // Klass name | |
| 83 mangle_name_on(&st, method->klass_name()); | |
| 84 st.print("_"); | |
| 85 // Method name | |
| 86 mangle_name_on(&st, method->name()); | |
| 87 return st.as_string(); | |
| 88 } | |
| 89 | |
| 90 | |
| 91 char* NativeLookup::long_jni_name(methodHandle method) { | |
| 92 // Signature ignore the wrapping parenteses and the trailing return type | |
| 93 stringStream st; | |
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94 Symbol* signature = method->signature(); |
| 0 | 95 st.print("__"); |
| 96 // find ')' | |
| 97 int end; | |
| 98 for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++); | |
| 99 // skip first '(' | |
| 100 mangle_name_on(&st, signature, 1, end); | |
| 101 return st.as_string(); | |
| 102 } | |
| 103 | |
| 104 extern "C" { | |
| 105 void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls); | |
| 710 | 106 void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls); |
| 0 | 107 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass); |
| 108 } | |
| 109 | |
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110 #define CC (char*) /* cast a literal from (const char*) */ |
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111 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
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112 |
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113 static JNINativeMethod lookup_special_native_methods[] = { |
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114 // Next two functions only exist for compatibility with 1.3.1 and earlier. |
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115 { CC"Java_java_io_ObjectOutputStream_getPrimitiveFieldValues", NULL, FN_PTR(JVM_GetPrimitiveFieldValues) }, // intercept ObjectOutputStream getPrimitiveFieldValues for faster serialization |
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116 { CC"Java_java_io_ObjectInputStream_setPrimitiveFieldValues", NULL, FN_PTR(JVM_SetPrimitiveFieldValues) }, // intercept ObjectInputStream setPrimitiveFieldValues for faster serialization |
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117 |
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118 { CC"Java_sun_misc_Unsafe_registerNatives", NULL, FN_PTR(JVM_RegisterUnsafeMethods) }, |
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119 { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) }, |
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120 { CC"Java_sun_dyn_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) }, // AllowTransitionalJSR292 |
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121 { CC"Java_java_dyn_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) }, // AllowTransitionalJSR292 |
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122 { CC"Java_sun_misc_Perf_registerNatives", NULL, FN_PTR(JVM_RegisterPerfMethods) } |
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123 }; |
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124 |
| 0 | 125 static address lookup_special_native(char* jni_name) { |
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126 int i = !JDK_Version::is_gte_jdk14x_version() ? 0 : 2; // see comment in lookup_special_native_methods |
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127 int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod); |
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128 for (; i < count; i++) { |
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129 // NB: To ignore the jni prefix and jni postfix strstr is used matching. |
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130 if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) { |
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131 return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr); |
| 0 | 132 } |
| 133 } | |
| 134 return NULL; | |
| 135 } | |
| 136 | |
| 137 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) { | |
| 138 address entry; | |
| 139 // Compute complete JNI name for style | |
| 140 stringStream st; | |
| 141 if (os_style) os::print_jni_name_prefix_on(&st, args_size); | |
| 142 st.print_raw(pure_name); | |
| 143 st.print_raw(long_name); | |
| 144 if (os_style) os::print_jni_name_suffix_on(&st, args_size); | |
| 145 char* jni_name = st.as_string(); | |
| 146 | |
| 147 // If the loader is null we have a system class, so we attempt a lookup in | |
| 148 // the native Java library. This takes care of any bootstrapping problems. | |
| 149 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find | |
| 150 // gets found the first time around - otherwise an infinite loop can occure. This is | |
| 151 // another VM/library dependency | |
| 152 Handle loader(THREAD, | |
| 153 instanceKlass::cast(method->method_holder())->class_loader()); | |
| 154 if (loader.is_null()) { | |
| 155 entry = lookup_special_native(jni_name); | |
| 156 if (entry == NULL) { | |
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157 entry = (address) os::dll_lookup(os::native_java_library(), jni_name); |
| 0 | 158 } |
| 159 if (entry != NULL) { | |
| 160 in_base_library = true; | |
| 161 return entry; | |
| 162 } | |
| 163 } | |
| 164 | |
| 165 // Otherwise call static method findNative in ClassLoader | |
| 1142 | 166 KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass()); |
| 0 | 167 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL); |
| 168 | |
| 169 JavaValue result(T_LONG); | |
| 170 JavaCalls::call_static(&result, | |
| 171 klass, | |
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172 vmSymbols::findNative_name(), |
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173 vmSymbols::classloader_string_long_signature(), |
| 0 | 174 // Arguments |
| 175 loader, | |
| 176 name_arg, | |
| 177 CHECK_NULL); | |
| 178 entry = (address) (intptr_t) result.get_jlong(); | |
| 179 | |
| 180 if (entry == NULL) { | |
| 181 // findNative didn't find it, if there are any agent libraries look in them | |
| 182 AgentLibrary* agent; | |
| 183 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
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184 entry = (address) os::dll_lookup(agent->os_lib(), jni_name); |
| 0 | 185 if (entry != NULL) { |
| 186 return entry; | |
| 187 } | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 return entry; | |
| 192 } | |
| 193 | |
| 194 | |
| 195 // Check all the formats of native implementation name to see if there is one | |
| 196 // for the specified method. | |
| 197 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) { | |
| 198 address entry = NULL; | |
| 199 in_base_library = false; | |
| 200 // Compute pure name | |
| 201 char* pure_name = pure_jni_name(method); | |
| 202 | |
| 203 // Compute argument size | |
| 204 int args_size = 1 // JNIEnv | |
| 205 + (method->is_static() ? 1 : 0) // class for static methods | |
| 206 + method->size_of_parameters(); // actual parameters | |
| 207 | |
| 208 | |
| 209 // 1) Try JNI short style | |
| 210 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL); | |
| 211 if (entry != NULL) return entry; | |
| 212 | |
| 213 // Compute long name | |
| 214 char* long_name = long_jni_name(method); | |
| 215 | |
| 216 // 2) Try JNI long style | |
| 217 entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL); | |
| 218 if (entry != NULL) return entry; | |
| 219 | |
| 220 // 3) Try JNI short style without os prefix/suffix | |
| 221 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL); | |
| 222 if (entry != NULL) return entry; | |
| 223 | |
| 224 // 4) Try JNI long style without os prefix/suffix | |
| 225 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL); | |
| 226 | |
| 227 return entry; // NULL indicates not found | |
| 228 } | |
| 229 | |
| 230 // Check if there are any JVM TI prefixes which have been applied to the native method name. | |
| 231 // If any are found, remove them before attemping the look up of the | |
| 232 // native implementation again. | |
| 233 // See SetNativeMethodPrefix in the JVM TI Spec for more details. | |
| 234 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) { | |
| 235 ResourceMark rm(THREAD); | |
| 236 | |
| 237 int prefix_count; | |
| 238 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
| 239 char* in_name = method->name()->as_C_string(); | |
| 240 char* wrapper_name = in_name; | |
| 241 // last applied prefix will be first -- go backwards | |
| 242 for (int i = prefix_count-1; i >= 0; i--) { | |
| 243 char* prefix = prefixes[i]; | |
| 244 size_t prefix_len = strlen(prefix); | |
| 245 if (strncmp(prefix, wrapper_name, prefix_len) == 0) { | |
| 246 // has this prefix remove it | |
| 247 wrapper_name += prefix_len; | |
| 248 } | |
| 249 } | |
| 250 if (wrapper_name != in_name) { | |
| 251 // we have a name for a wrapping method | |
| 252 int wrapper_name_len = (int)strlen(wrapper_name); | |
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253 TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len); |
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254 if (wrapper_symbol != NULL) { |
| 0 | 255 KlassHandle kh(method->method_holder()); |
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256 methodOop wrapper_method = Klass::cast(kh())->lookup_method(wrapper_symbol, |
| 0 | 257 method->signature()); |
| 258 if (wrapper_method != NULL && !wrapper_method->is_native()) { | |
| 259 // we found a wrapper method, use its native entry | |
| 260 method->set_is_prefixed_native(); | |
| 261 return lookup_entry(wrapper_method, in_base_library, THREAD); | |
| 262 } | |
| 263 } | |
| 264 } | |
| 265 return NULL; | |
| 266 } | |
| 267 | |
| 268 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) { | |
| 269 address entry = NULL; | |
| 270 ResourceMark rm(THREAD); | |
| 271 | |
| 272 entry = lookup_entry(method, in_base_library, THREAD); | |
| 273 if (entry != NULL) return entry; | |
| 274 | |
| 275 // standard native method resolution has failed. Check if there are any | |
| 276 // JVM TI prefixes which have been applied to the native method name. | |
| 277 entry = lookup_entry_prefixed(method, in_base_library, THREAD); | |
| 278 if (entry != NULL) return entry; | |
| 279 | |
| 280 // Native function not found, throw UnsatisfiedLinkError | |
| 281 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(), | |
| 282 method->name_and_sig_as_C_string()); | |
| 283 } | |
| 284 | |
| 285 | |
| 286 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) { | |
| 287 if (!method->has_native_function()) { | |
| 288 address entry = lookup_base(method, in_base_library, CHECK_NULL); | |
| 289 method->set_native_function(entry, | |
| 290 methodOopDesc::native_bind_event_is_interesting); | |
| 291 // -verbose:jni printing | |
| 292 if (PrintJNIResolving) { | |
| 293 ResourceMark rm(THREAD); | |
| 294 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]", | |
| 295 Klass::cast(method->method_holder())->external_name(), | |
| 296 method->name()->as_C_string()); | |
| 297 } | |
| 298 } | |
| 299 return method->native_function(); | |
| 300 } | |
| 301 | |
| 302 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) { | |
| 303 EXCEPTION_MARK; | |
| 304 bool in_base_library = true; // SharedRuntime inits some math methods. | |
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305 TempNewSymbol c_name = SymbolTable::new_symbol(class_name, CATCH); |
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306 TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH); |
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307 TempNewSymbol s_name = SymbolTable::new_symbol(signature, CATCH); |
| 0 | 308 |
| 309 // Find the class | |
| 310 klassOop k = SystemDictionary::resolve_or_fail(c_name, true, CATCH); | |
| 311 instanceKlassHandle klass (THREAD, k); | |
| 312 | |
| 313 // Find method and invoke standard lookup | |
| 314 methodHandle method (THREAD, | |
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315 klass->uncached_lookup_method(m_name, s_name)); |
| 0 | 316 address result = lookup(method, in_base_library, CATCH); |
| 317 assert(in_base_library, "must be in basic library"); | |
| 318 guarantee(result != NULL, "must be non NULL"); | |
| 319 return result; | |
| 320 } |