Tue, 17 Oct 2017 12:58:25 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #include "precompiled.hpp" |
aoqi@0 | 26 | #include "classfile/javaClasses.hpp" |
aoqi@0 | 27 | #include "classfile/systemDictionary.hpp" |
aoqi@0 | 28 | #include "classfile/vmSymbols.hpp" |
aoqi@0 | 29 | #include "memory/oopFactory.hpp" |
aoqi@0 | 30 | #include "memory/resourceArea.hpp" |
aoqi@0 | 31 | #include "memory/universe.inline.hpp" |
aoqi@0 | 32 | #include "oops/instanceKlass.hpp" |
aoqi@0 | 33 | #include "oops/method.hpp" |
aoqi@0 | 34 | #include "oops/oop.inline.hpp" |
aoqi@0 | 35 | #include "oops/symbol.hpp" |
aoqi@0 | 36 | #include "prims/jvm_misc.hpp" |
aoqi@0 | 37 | #include "prims/nativeLookup.hpp" |
aoqi@0 | 38 | #include "runtime/arguments.hpp" |
aoqi@0 | 39 | #include "runtime/handles.inline.hpp" |
aoqi@0 | 40 | #include "runtime/javaCalls.hpp" |
aoqi@0 | 41 | #include "runtime/sharedRuntime.hpp" |
aoqi@0 | 42 | #include "runtime/signature.hpp" |
aoqi@0 | 43 | #include "utilities/macros.hpp" |
aoqi@0 | 44 | #ifdef TARGET_OS_FAMILY_linux |
aoqi@0 | 45 | # include "os_linux.inline.hpp" |
aoqi@0 | 46 | #endif |
aoqi@0 | 47 | #ifdef TARGET_OS_FAMILY_solaris |
aoqi@0 | 48 | # include "os_solaris.inline.hpp" |
aoqi@0 | 49 | #endif |
aoqi@0 | 50 | #ifdef TARGET_OS_FAMILY_windows |
aoqi@0 | 51 | # include "os_windows.inline.hpp" |
aoqi@0 | 52 | #endif |
aoqi@0 | 53 | #ifdef TARGET_OS_FAMILY_aix |
aoqi@0 | 54 | # include "os_aix.inline.hpp" |
aoqi@0 | 55 | #endif |
aoqi@0 | 56 | #ifdef TARGET_OS_FAMILY_bsd |
aoqi@0 | 57 | # include "os_bsd.inline.hpp" |
aoqi@0 | 58 | #endif |
aoqi@0 | 59 | |
aoqi@0 | 60 | |
aoqi@0 | 61 | static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) { |
aoqi@0 | 62 | char* bytes = (char*)name->bytes() + begin; |
aoqi@0 | 63 | char* end_bytes = (char*)name->bytes() + end; |
aoqi@0 | 64 | while (bytes < end_bytes) { |
aoqi@0 | 65 | jchar c; |
aoqi@0 | 66 | bytes = UTF8::next(bytes, &c); |
aoqi@0 | 67 | if (c <= 0x7f && isalnum(c)) { |
aoqi@0 | 68 | st->put((char) c); |
aoqi@0 | 69 | } else { |
aoqi@0 | 70 | if (c == '_') st->print("_1"); |
aoqi@0 | 71 | else if (c == '/') st->print("_"); |
aoqi@0 | 72 | else if (c == ';') st->print("_2"); |
aoqi@0 | 73 | else if (c == '[') st->print("_3"); |
aoqi@0 | 74 | else st->print("_%.5x", c); |
aoqi@0 | 75 | } |
aoqi@0 | 76 | } |
aoqi@0 | 77 | } |
aoqi@0 | 78 | |
aoqi@0 | 79 | |
aoqi@0 | 80 | static void mangle_name_on(outputStream* st, Symbol* name) { |
aoqi@0 | 81 | mangle_name_on(st, name, 0, name->utf8_length()); |
aoqi@0 | 82 | } |
aoqi@0 | 83 | |
aoqi@0 | 84 | |
aoqi@0 | 85 | char* NativeLookup::pure_jni_name(methodHandle method) { |
aoqi@0 | 86 | stringStream st; |
aoqi@0 | 87 | // Prefix |
aoqi@0 | 88 | st.print("Java_"); |
aoqi@0 | 89 | // Klass name |
aoqi@0 | 90 | mangle_name_on(&st, method->klass_name()); |
aoqi@0 | 91 | st.print("_"); |
aoqi@0 | 92 | // Method name |
aoqi@0 | 93 | mangle_name_on(&st, method->name()); |
aoqi@0 | 94 | return st.as_string(); |
aoqi@0 | 95 | } |
aoqi@0 | 96 | |
aoqi@0 | 97 | |
aoqi@0 | 98 | char* NativeLookup::critical_jni_name(methodHandle method) { |
aoqi@0 | 99 | stringStream st; |
aoqi@0 | 100 | // Prefix |
aoqi@0 | 101 | st.print("JavaCritical_"); |
aoqi@0 | 102 | // Klass name |
aoqi@0 | 103 | mangle_name_on(&st, method->klass_name()); |
aoqi@0 | 104 | st.print("_"); |
aoqi@0 | 105 | // Method name |
aoqi@0 | 106 | mangle_name_on(&st, method->name()); |
aoqi@0 | 107 | return st.as_string(); |
aoqi@0 | 108 | } |
aoqi@0 | 109 | |
aoqi@0 | 110 | |
aoqi@0 | 111 | char* NativeLookup::long_jni_name(methodHandle method) { |
aoqi@0 | 112 | // Signature ignore the wrapping parenteses and the trailing return type |
aoqi@0 | 113 | stringStream st; |
aoqi@0 | 114 | Symbol* signature = method->signature(); |
aoqi@0 | 115 | st.print("__"); |
aoqi@0 | 116 | // find ')' |
aoqi@0 | 117 | int end; |
aoqi@0 | 118 | for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++); |
aoqi@0 | 119 | // skip first '(' |
aoqi@0 | 120 | mangle_name_on(&st, signature, 1, end); |
aoqi@0 | 121 | return st.as_string(); |
aoqi@0 | 122 | } |
aoqi@0 | 123 | |
aoqi@0 | 124 | extern "C" { |
aoqi@0 | 125 | void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls); |
aoqi@0 | 126 | void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls); |
aoqi@0 | 127 | void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass); |
aoqi@0 | 128 | void JNICALL JVM_RegisterWhiteBoxMethods(JNIEnv *env, jclass wbclass); |
aoqi@0 | 129 | } |
aoqi@0 | 130 | |
aoqi@0 | 131 | #define CC (char*) /* cast a literal from (const char*) */ |
aoqi@0 | 132 | #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
aoqi@0 | 133 | |
aoqi@0 | 134 | static JNINativeMethod lookup_special_native_methods[] = { |
aoqi@0 | 135 | { CC"Java_sun_misc_Unsafe_registerNatives", NULL, FN_PTR(JVM_RegisterUnsafeMethods) }, |
aoqi@0 | 136 | { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) }, |
aoqi@0 | 137 | { CC"Java_sun_misc_Perf_registerNatives", NULL, FN_PTR(JVM_RegisterPerfMethods) }, |
aoqi@0 | 138 | { CC"Java_sun_hotspot_WhiteBox_registerNatives", NULL, FN_PTR(JVM_RegisterWhiteBoxMethods) }, |
aoqi@0 | 139 | }; |
aoqi@0 | 140 | |
aoqi@0 | 141 | static address lookup_special_native(char* jni_name) { |
aoqi@0 | 142 | int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod); |
aoqi@0 | 143 | for (int i = 0; i < count; i++) { |
aoqi@0 | 144 | // NB: To ignore the jni prefix and jni postfix strstr is used matching. |
aoqi@0 | 145 | if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) { |
aoqi@0 | 146 | return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr); |
aoqi@0 | 147 | } |
aoqi@0 | 148 | } |
aoqi@0 | 149 | return NULL; |
aoqi@0 | 150 | } |
aoqi@0 | 151 | |
aoqi@0 | 152 | address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) { |
aoqi@0 | 153 | address entry; |
aoqi@0 | 154 | // Compute complete JNI name for style |
aoqi@0 | 155 | stringStream st; |
aoqi@0 | 156 | if (os_style) os::print_jni_name_prefix_on(&st, args_size); |
aoqi@0 | 157 | st.print_raw(pure_name); |
aoqi@0 | 158 | st.print_raw(long_name); |
aoqi@0 | 159 | if (os_style) os::print_jni_name_suffix_on(&st, args_size); |
aoqi@0 | 160 | char* jni_name = st.as_string(); |
aoqi@0 | 161 | |
aoqi@0 | 162 | // If the loader is null we have a system class, so we attempt a lookup in |
aoqi@0 | 163 | // the native Java library. This takes care of any bootstrapping problems. |
aoqi@0 | 164 | // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find |
aoqi@0 | 165 | // gets found the first time around - otherwise an infinite loop can occure. This is |
aoqi@0 | 166 | // another VM/library dependency |
aoqi@0 | 167 | Handle loader(THREAD, method->method_holder()->class_loader()); |
aoqi@0 | 168 | if (loader.is_null()) { |
aoqi@0 | 169 | entry = lookup_special_native(jni_name); |
aoqi@0 | 170 | if (entry == NULL) { |
aoqi@0 | 171 | entry = (address) os::dll_lookup(os::native_java_library(), jni_name); |
aoqi@0 | 172 | } |
aoqi@0 | 173 | if (entry != NULL) { |
aoqi@0 | 174 | in_base_library = true; |
aoqi@0 | 175 | return entry; |
aoqi@0 | 176 | } |
aoqi@0 | 177 | } |
aoqi@0 | 178 | |
aoqi@0 | 179 | // Otherwise call static method findNative in ClassLoader |
aoqi@0 | 180 | KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass()); |
aoqi@0 | 181 | Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL); |
aoqi@0 | 182 | |
aoqi@0 | 183 | JavaValue result(T_LONG); |
aoqi@0 | 184 | JavaCalls::call_static(&result, |
aoqi@0 | 185 | klass, |
aoqi@0 | 186 | vmSymbols::findNative_name(), |
aoqi@0 | 187 | vmSymbols::classloader_string_long_signature(), |
aoqi@0 | 188 | // Arguments |
aoqi@0 | 189 | loader, |
aoqi@0 | 190 | name_arg, |
aoqi@0 | 191 | CHECK_NULL); |
aoqi@0 | 192 | entry = (address) (intptr_t) result.get_jlong(); |
aoqi@0 | 193 | |
aoqi@0 | 194 | if (entry == NULL) { |
aoqi@0 | 195 | // findNative didn't find it, if there are any agent libraries look in them |
aoqi@0 | 196 | AgentLibrary* agent; |
aoqi@0 | 197 | for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
aoqi@0 | 198 | entry = (address) os::dll_lookup(agent->os_lib(), jni_name); |
aoqi@0 | 199 | if (entry != NULL) { |
aoqi@0 | 200 | return entry; |
aoqi@0 | 201 | } |
aoqi@0 | 202 | } |
aoqi@0 | 203 | } |
aoqi@0 | 204 | |
aoqi@0 | 205 | return entry; |
aoqi@0 | 206 | } |
aoqi@0 | 207 | |
aoqi@0 | 208 | |
aoqi@0 | 209 | address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) { |
aoqi@0 | 210 | if (!method->has_native_function()) { |
aoqi@0 | 211 | return NULL; |
aoqi@0 | 212 | } |
aoqi@0 | 213 | |
aoqi@0 | 214 | address current_entry = method->native_function(); |
aoqi@0 | 215 | |
aoqi@0 | 216 | char dll_name[JVM_MAXPATHLEN]; |
aoqi@0 | 217 | int offset; |
aoqi@0 | 218 | if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) { |
aoqi@0 | 219 | char ebuf[32]; |
aoqi@0 | 220 | void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf)); |
aoqi@0 | 221 | if (dll != NULL) { |
aoqi@0 | 222 | // Compute complete JNI name for style |
aoqi@0 | 223 | stringStream st; |
aoqi@0 | 224 | if (os_style) os::print_jni_name_prefix_on(&st, args_size); |
aoqi@0 | 225 | st.print_raw(pure_name); |
aoqi@0 | 226 | st.print_raw(long_name); |
aoqi@0 | 227 | if (os_style) os::print_jni_name_suffix_on(&st, args_size); |
aoqi@0 | 228 | char* jni_name = st.as_string(); |
aoqi@0 | 229 | return (address)os::dll_lookup(dll, jni_name); |
aoqi@0 | 230 | } |
aoqi@0 | 231 | } |
aoqi@0 | 232 | |
aoqi@0 | 233 | return NULL; |
aoqi@0 | 234 | } |
aoqi@0 | 235 | |
aoqi@0 | 236 | |
aoqi@0 | 237 | // Check all the formats of native implementation name to see if there is one |
aoqi@0 | 238 | // for the specified method. |
aoqi@0 | 239 | address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) { |
aoqi@0 | 240 | address entry = NULL; |
aoqi@0 | 241 | in_base_library = false; |
aoqi@0 | 242 | // Compute pure name |
aoqi@0 | 243 | char* pure_name = pure_jni_name(method); |
aoqi@0 | 244 | |
aoqi@0 | 245 | // Compute argument size |
aoqi@0 | 246 | int args_size = 1 // JNIEnv |
aoqi@0 | 247 | + (method->is_static() ? 1 : 0) // class for static methods |
aoqi@0 | 248 | + method->size_of_parameters(); // actual parameters |
aoqi@0 | 249 | |
aoqi@0 | 250 | |
aoqi@0 | 251 | // 1) Try JNI short style |
aoqi@0 | 252 | entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL); |
aoqi@0 | 253 | if (entry != NULL) return entry; |
aoqi@0 | 254 | |
aoqi@0 | 255 | // Compute long name |
aoqi@0 | 256 | char* long_name = long_jni_name(method); |
aoqi@0 | 257 | |
aoqi@0 | 258 | // 2) Try JNI long style |
aoqi@0 | 259 | entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL); |
aoqi@0 | 260 | if (entry != NULL) return entry; |
aoqi@0 | 261 | |
aoqi@0 | 262 | // 3) Try JNI short style without os prefix/suffix |
aoqi@0 | 263 | entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL); |
aoqi@0 | 264 | if (entry != NULL) return entry; |
aoqi@0 | 265 | |
aoqi@0 | 266 | // 4) Try JNI long style without os prefix/suffix |
aoqi@0 | 267 | entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL); |
aoqi@0 | 268 | |
aoqi@0 | 269 | return entry; // NULL indicates not found |
aoqi@0 | 270 | } |
aoqi@0 | 271 | |
aoqi@0 | 272 | // Check all the formats of native implementation name to see if there is one |
aoqi@0 | 273 | // for the specified method. |
aoqi@0 | 274 | address NativeLookup::lookup_critical_entry(methodHandle method) { |
aoqi@0 | 275 | if (!CriticalJNINatives) return NULL; |
aoqi@0 | 276 | |
aoqi@0 | 277 | if (method->is_synchronized() || |
aoqi@0 | 278 | !method->is_static()) { |
aoqi@0 | 279 | // Only static non-synchronized methods are allowed |
aoqi@0 | 280 | return NULL; |
aoqi@0 | 281 | } |
aoqi@0 | 282 | |
aoqi@0 | 283 | ResourceMark rm; |
aoqi@0 | 284 | address entry = NULL; |
aoqi@0 | 285 | |
aoqi@0 | 286 | Symbol* signature = method->signature(); |
aoqi@0 | 287 | for (int end = 0; end < signature->utf8_length(); end++) { |
aoqi@0 | 288 | if (signature->byte_at(end) == 'L') { |
aoqi@0 | 289 | // Don't allow object types |
aoqi@0 | 290 | return NULL; |
aoqi@0 | 291 | } |
aoqi@0 | 292 | } |
aoqi@0 | 293 | |
aoqi@0 | 294 | // Compute critical name |
aoqi@0 | 295 | char* critical_name = critical_jni_name(method); |
aoqi@0 | 296 | |
aoqi@0 | 297 | // Compute argument size |
aoqi@0 | 298 | int args_size = 1 // JNIEnv |
aoqi@0 | 299 | + (method->is_static() ? 1 : 0) // class for static methods |
aoqi@0 | 300 | + method->size_of_parameters(); // actual parameters |
aoqi@0 | 301 | |
aoqi@0 | 302 | |
aoqi@0 | 303 | // 1) Try JNI short style |
aoqi@0 | 304 | entry = lookup_critical_style(method, critical_name, "", args_size, true); |
aoqi@0 | 305 | if (entry != NULL) return entry; |
aoqi@0 | 306 | |
aoqi@0 | 307 | // Compute long name |
aoqi@0 | 308 | char* long_name = long_jni_name(method); |
aoqi@0 | 309 | |
aoqi@0 | 310 | // 2) Try JNI long style |
aoqi@0 | 311 | entry = lookup_critical_style(method, critical_name, long_name, args_size, true); |
aoqi@0 | 312 | if (entry != NULL) return entry; |
aoqi@0 | 313 | |
aoqi@0 | 314 | // 3) Try JNI short style without os prefix/suffix |
aoqi@0 | 315 | entry = lookup_critical_style(method, critical_name, "", args_size, false); |
aoqi@0 | 316 | if (entry != NULL) return entry; |
aoqi@0 | 317 | |
aoqi@0 | 318 | // 4) Try JNI long style without os prefix/suffix |
aoqi@0 | 319 | entry = lookup_critical_style(method, critical_name, long_name, args_size, false); |
aoqi@0 | 320 | |
aoqi@0 | 321 | return entry; // NULL indicates not found |
aoqi@0 | 322 | } |
aoqi@0 | 323 | |
aoqi@0 | 324 | // Check if there are any JVM TI prefixes which have been applied to the native method name. |
aoqi@0 | 325 | // If any are found, remove them before attemping the look up of the |
aoqi@0 | 326 | // native implementation again. |
aoqi@0 | 327 | // See SetNativeMethodPrefix in the JVM TI Spec for more details. |
aoqi@0 | 328 | address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) { |
aoqi@0 | 329 | #if INCLUDE_JVMTI |
aoqi@0 | 330 | ResourceMark rm(THREAD); |
aoqi@0 | 331 | |
aoqi@0 | 332 | int prefix_count; |
aoqi@0 | 333 | char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); |
aoqi@0 | 334 | char* in_name = method->name()->as_C_string(); |
aoqi@0 | 335 | char* wrapper_name = in_name; |
aoqi@0 | 336 | // last applied prefix will be first -- go backwards |
aoqi@0 | 337 | for (int i = prefix_count-1; i >= 0; i--) { |
aoqi@0 | 338 | char* prefix = prefixes[i]; |
aoqi@0 | 339 | size_t prefix_len = strlen(prefix); |
aoqi@0 | 340 | if (strncmp(prefix, wrapper_name, prefix_len) == 0) { |
aoqi@0 | 341 | // has this prefix remove it |
aoqi@0 | 342 | wrapper_name += prefix_len; |
aoqi@0 | 343 | } |
aoqi@0 | 344 | } |
aoqi@0 | 345 | if (wrapper_name != in_name) { |
aoqi@0 | 346 | // we have a name for a wrapping method |
aoqi@0 | 347 | int wrapper_name_len = (int)strlen(wrapper_name); |
aoqi@0 | 348 | TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len); |
aoqi@0 | 349 | if (wrapper_symbol != NULL) { |
aoqi@0 | 350 | KlassHandle kh(method->method_holder()); |
aoqi@0 | 351 | Method* wrapper_method = kh()->lookup_method(wrapper_symbol, |
aoqi@0 | 352 | method->signature()); |
aoqi@0 | 353 | if (wrapper_method != NULL && !wrapper_method->is_native()) { |
aoqi@0 | 354 | // we found a wrapper method, use its native entry |
aoqi@0 | 355 | method->set_is_prefixed_native(); |
aoqi@0 | 356 | return lookup_entry(wrapper_method, in_base_library, THREAD); |
aoqi@0 | 357 | } |
aoqi@0 | 358 | } |
aoqi@0 | 359 | } |
aoqi@0 | 360 | #endif // INCLUDE_JVMTI |
aoqi@0 | 361 | return NULL; |
aoqi@0 | 362 | } |
aoqi@0 | 363 | |
aoqi@0 | 364 | address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) { |
aoqi@0 | 365 | address entry = NULL; |
aoqi@0 | 366 | ResourceMark rm(THREAD); |
aoqi@0 | 367 | |
aoqi@0 | 368 | entry = lookup_entry(method, in_base_library, THREAD); |
aoqi@0 | 369 | if (entry != NULL) return entry; |
aoqi@0 | 370 | |
aoqi@0 | 371 | // standard native method resolution has failed. Check if there are any |
aoqi@0 | 372 | // JVM TI prefixes which have been applied to the native method name. |
aoqi@0 | 373 | entry = lookup_entry_prefixed(method, in_base_library, THREAD); |
aoqi@0 | 374 | if (entry != NULL) return entry; |
aoqi@0 | 375 | |
aoqi@0 | 376 | // Native function not found, throw UnsatisfiedLinkError |
aoqi@0 | 377 | THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(), |
aoqi@0 | 378 | method->name_and_sig_as_C_string()); |
aoqi@0 | 379 | } |
aoqi@0 | 380 | |
aoqi@0 | 381 | |
aoqi@0 | 382 | address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) { |
aoqi@0 | 383 | if (!method->has_native_function()) { |
aoqi@0 | 384 | address entry = lookup_base(method, in_base_library, CHECK_NULL); |
aoqi@0 | 385 | method->set_native_function(entry, |
aoqi@0 | 386 | Method::native_bind_event_is_interesting); |
aoqi@0 | 387 | // -verbose:jni printing |
aoqi@0 | 388 | if (PrintJNIResolving) { |
aoqi@0 | 389 | ResourceMark rm(THREAD); |
aoqi@0 | 390 | tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]", |
aoqi@0 | 391 | method->method_holder()->external_name(), |
aoqi@0 | 392 | method->name()->as_C_string()); |
aoqi@0 | 393 | } |
aoqi@0 | 394 | } |
aoqi@0 | 395 | return method->native_function(); |
aoqi@0 | 396 | } |
aoqi@0 | 397 | |
aoqi@0 | 398 | address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) { |
aoqi@0 | 399 | EXCEPTION_MARK; |
aoqi@0 | 400 | bool in_base_library = true; // SharedRuntime inits some math methods. |
aoqi@0 | 401 | TempNewSymbol c_name = SymbolTable::new_symbol(class_name, CATCH); |
aoqi@0 | 402 | TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH); |
aoqi@0 | 403 | TempNewSymbol s_name = SymbolTable::new_symbol(signature, CATCH); |
aoqi@0 | 404 | |
aoqi@0 | 405 | // Find the class |
aoqi@0 | 406 | Klass* k = SystemDictionary::resolve_or_fail(c_name, true, CATCH); |
aoqi@0 | 407 | instanceKlassHandle klass (THREAD, k); |
aoqi@0 | 408 | |
aoqi@0 | 409 | // Find method and invoke standard lookup |
aoqi@0 | 410 | methodHandle method (THREAD, |
aoqi@0 | 411 | klass->uncached_lookup_method(m_name, s_name, Klass::normal)); |
aoqi@0 | 412 | address result = lookup(method, in_base_library, CATCH); |
aoqi@0 | 413 | assert(in_base_library, "must be in basic library"); |
aoqi@0 | 414 | guarantee(result != NULL, "must be non NULL"); |
aoqi@0 | 415 | return result; |
aoqi@0 | 416 | } |