Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/nativeLookup.cpp @ 1748:3e8fbc61cee8
6978355: renaming for 6961697
Summary: This is the renaming part of 6961697 to keep the actual changes small for review.
Reviewed-by: kvn, never
author | twisti |
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date | Wed, 25 Aug 2010 05:27:54 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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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 } |