|
0
|
1 /*
|
|
|
2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
|
|
|
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 *
|
|
|
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
|
21 * have any questions.
|
|
|
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);
|
|
|
81 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass);
|
|
|
82 }
|
|
|
83
|
|
|
84 static address lookup_special_native(char* jni_name) {
|
|
|
85 // NB: To ignore the jni prefix and jni postfix strstr is used matching.
|
|
|
86 if (!JDK_Version::is_gte_jdk14x_version()) {
|
|
|
87 // These functions only exist for compatibility with 1.3.1 and earlier
|
|
|
88 // Intercept ObjectOutputStream getPrimitiveFieldValues for faster serialization
|
|
|
89 if (strstr(jni_name, "Java_java_io_ObjectOutputStream_getPrimitiveFieldValues") != NULL) {
|
|
|
90 return CAST_FROM_FN_PTR(address, JVM_GetPrimitiveFieldValues);
|
|
|
91 }
|
|
|
92 // Intercept ObjectInputStream setPrimitiveFieldValues for faster serialization
|
|
|
93 if (strstr(jni_name, "Java_java_io_ObjectInputStream_setPrimitiveFieldValues") != NULL) {
|
|
|
94 return CAST_FROM_FN_PTR(address, JVM_SetPrimitiveFieldValues);
|
|
|
95 }
|
|
|
96 }
|
|
|
97 if (strstr(jni_name, "Java_sun_misc_Unsafe_registerNatives") != NULL) {
|
|
|
98 return CAST_FROM_FN_PTR(address, JVM_RegisterUnsafeMethods);
|
|
|
99 }
|
|
|
100 if (strstr(jni_name, "Java_sun_misc_Perf_registerNatives") != NULL) {
|
|
|
101 return CAST_FROM_FN_PTR(address, JVM_RegisterPerfMethods);
|
|
|
102 }
|
|
|
103
|
|
|
104 return NULL;
|
|
|
105 }
|
|
|
106
|
|
|
107 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) {
|
|
|
108 address entry;
|
|
|
109 // Compute complete JNI name for style
|
|
|
110 stringStream st;
|
|
|
111 if (os_style) os::print_jni_name_prefix_on(&st, args_size);
|
|
|
112 st.print_raw(pure_name);
|
|
|
113 st.print_raw(long_name);
|
|
|
114 if (os_style) os::print_jni_name_suffix_on(&st, args_size);
|
|
|
115 char* jni_name = st.as_string();
|
|
|
116
|
|
|
117 // If the loader is null we have a system class, so we attempt a lookup in
|
|
|
118 // the native Java library. This takes care of any bootstrapping problems.
|
|
|
119 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find
|
|
|
120 // gets found the first time around - otherwise an infinite loop can occure. This is
|
|
|
121 // another VM/library dependency
|
|
|
122 Handle loader(THREAD,
|
|
|
123 instanceKlass::cast(method->method_holder())->class_loader());
|
|
|
124 if (loader.is_null()) {
|
|
|
125 entry = lookup_special_native(jni_name);
|
|
|
126 if (entry == NULL) {
|
|
|
127 entry = (address) hpi::dll_lookup(os::native_java_library(), jni_name);
|
|
|
128 }
|
|
|
129 if (entry != NULL) {
|
|
|
130 in_base_library = true;
|
|
|
131 return entry;
|
|
|
132 }
|
|
|
133 }
|
|
|
134
|
|
|
135 // Otherwise call static method findNative in ClassLoader
|
|
|
136 KlassHandle klass (THREAD, SystemDictionary::classloader_klass());
|
|
|
137 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL);
|
|
|
138
|
|
|
139 JavaValue result(T_LONG);
|
|
|
140 JavaCalls::call_static(&result,
|
|
|
141 klass,
|
|
|
142 vmSymbolHandles::findNative_name(),
|
|
|
143 vmSymbolHandles::classloader_string_long_signature(),
|
|
|
144 // Arguments
|
|
|
145 loader,
|
|
|
146 name_arg,
|
|
|
147 CHECK_NULL);
|
|
|
148 entry = (address) (intptr_t) result.get_jlong();
|
|
|
149
|
|
|
150 if (entry == NULL) {
|
|
|
151 // findNative didn't find it, if there are any agent libraries look in them
|
|
|
152 AgentLibrary* agent;
|
|
|
153 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
|
|
|
154 entry = (address) hpi::dll_lookup(agent->os_lib(), jni_name);
|
|
|
155 if (entry != NULL) {
|
|
|
156 return entry;
|
|
|
157 }
|
|
|
158 }
|
|
|
159 }
|
|
|
160
|
|
|
161 return entry;
|
|
|
162 }
|
|
|
163
|
|
|
164
|
|
|
165 // Check all the formats of native implementation name to see if there is one
|
|
|
166 // for the specified method.
|
|
|
167 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) {
|
|
|
168 address entry = NULL;
|
|
|
169 in_base_library = false;
|
|
|
170 // Compute pure name
|
|
|
171 char* pure_name = pure_jni_name(method);
|
|
|
172
|
|
|
173 // Compute argument size
|
|
|
174 int args_size = 1 // JNIEnv
|
|
|
175 + (method->is_static() ? 1 : 0) // class for static methods
|
|
|
176 + method->size_of_parameters(); // actual parameters
|
|
|
177
|
|
|
178
|
|
|
179 // 1) Try JNI short style
|
|
|
180 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL);
|
|
|
181 if (entry != NULL) return entry;
|
|
|
182
|
|
|
183 // Compute long name
|
|
|
184 char* long_name = long_jni_name(method);
|
|
|
185
|
|
|
186 // 2) Try JNI long style
|
|
|
187 entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL);
|
|
|
188 if (entry != NULL) return entry;
|
|
|
189
|
|
|
190 // 3) Try JNI short style without os prefix/suffix
|
|
|
191 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL);
|
|
|
192 if (entry != NULL) return entry;
|
|
|
193
|
|
|
194 // 4) Try JNI long style without os prefix/suffix
|
|
|
195 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL);
|
|
|
196
|
|
|
197 return entry; // NULL indicates not found
|
|
|
198 }
|
|
|
199
|
|
|
200 // Check if there are any JVM TI prefixes which have been applied to the native method name.
|
|
|
201 // If any are found, remove them before attemping the look up of the
|
|
|
202 // native implementation again.
|
|
|
203 // See SetNativeMethodPrefix in the JVM TI Spec for more details.
|
|
|
204 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) {
|
|
|
205 ResourceMark rm(THREAD);
|
|
|
206
|
|
|
207 int prefix_count;
|
|
|
208 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
|
|
|
209 char* in_name = method->name()->as_C_string();
|
|
|
210 char* wrapper_name = in_name;
|
|
|
211 // last applied prefix will be first -- go backwards
|
|
|
212 for (int i = prefix_count-1; i >= 0; i--) {
|
|
|
213 char* prefix = prefixes[i];
|
|
|
214 size_t prefix_len = strlen(prefix);
|
|
|
215 if (strncmp(prefix, wrapper_name, prefix_len) == 0) {
|
|
|
216 // has this prefix remove it
|
|
|
217 wrapper_name += prefix_len;
|
|
|
218 }
|
|
|
219 }
|
|
|
220 if (wrapper_name != in_name) {
|
|
|
221 // we have a name for a wrapping method
|
|
|
222 int wrapper_name_len = (int)strlen(wrapper_name);
|
|
|
223 symbolHandle wrapper_symbol(THREAD, SymbolTable::probe(wrapper_name, wrapper_name_len));
|
|
|
224 if (!wrapper_symbol.is_null()) {
|
|
|
225 KlassHandle kh(method->method_holder());
|
|
|
226 methodOop wrapper_method = Klass::cast(kh())->lookup_method(wrapper_symbol(),
|
|
|
227 method->signature());
|
|
|
228 if (wrapper_method != NULL && !wrapper_method->is_native()) {
|
|
|
229 // we found a wrapper method, use its native entry
|
|
|
230 method->set_is_prefixed_native();
|
|
|
231 return lookup_entry(wrapper_method, in_base_library, THREAD);
|
|
|
232 }
|
|
|
233 }
|
|
|
234 }
|
|
|
235 return NULL;
|
|
|
236 }
|
|
|
237
|
|
|
238 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) {
|
|
|
239 address entry = NULL;
|
|
|
240 ResourceMark rm(THREAD);
|
|
|
241
|
|
|
242 entry = lookup_entry(method, in_base_library, THREAD);
|
|
|
243 if (entry != NULL) return entry;
|
|
|
244
|
|
|
245 // standard native method resolution has failed. Check if there are any
|
|
|
246 // JVM TI prefixes which have been applied to the native method name.
|
|
|
247 entry = lookup_entry_prefixed(method, in_base_library, THREAD);
|
|
|
248 if (entry != NULL) return entry;
|
|
|
249
|
|
|
250 // Native function not found, throw UnsatisfiedLinkError
|
|
|
251 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(),
|
|
|
252 method->name_and_sig_as_C_string());
|
|
|
253 }
|
|
|
254
|
|
|
255
|
|
|
256 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) {
|
|
|
257 if (!method->has_native_function()) {
|
|
|
258 address entry = lookup_base(method, in_base_library, CHECK_NULL);
|
|
|
259 method->set_native_function(entry,
|
|
|
260 methodOopDesc::native_bind_event_is_interesting);
|
|
|
261 // -verbose:jni printing
|
|
|
262 if (PrintJNIResolving) {
|
|
|
263 ResourceMark rm(THREAD);
|
|
|
264 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]",
|
|
|
265 Klass::cast(method->method_holder())->external_name(),
|
|
|
266 method->name()->as_C_string());
|
|
|
267 }
|
|
|
268 }
|
|
|
269 return method->native_function();
|
|
|
270 }
|
|
|
271
|
|
|
272 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) {
|
|
|
273 EXCEPTION_MARK;
|
|
|
274 bool in_base_library = true; // SharedRuntime inits some math methods.
|
|
|
275 symbolHandle c_name = oopFactory::new_symbol_handle(class_name, CATCH);
|
|
|
276 symbolHandle m_name = oopFactory::new_symbol_handle(method_name, CATCH);
|
|
|
277 symbolHandle s_name = oopFactory::new_symbol_handle(signature, CATCH);
|
|
|
278
|
|
|
279 // Find the class
|
|
|
280 klassOop k = SystemDictionary::resolve_or_fail(c_name, true, CATCH);
|
|
|
281 instanceKlassHandle klass (THREAD, k);
|
|
|
282
|
|
|
283 // Find method and invoke standard lookup
|
|
|
284 methodHandle method (THREAD,
|
|
|
285 klass->uncached_lookup_method(m_name(), s_name()));
|
|
|
286 address result = lookup(method, in_base_library, CATCH);
|
|
|
287 assert(in_base_library, "must be in basic library");
|
|
|
288 guarantee(result != NULL, "must be non NULL");
|
|
|
289 return result;
|
|
|
290 }
|
