Mercurial > hg > truffle
annotate src/share/vm/prims/nativeLookup.cpp @ 6735:aed758eda82a
7195833: NPG: Rename instanceClassLoaderKlass, instanceRefKlass and instanceMirrorKlass
Summary: Simple renaming to be consistent with instanceKlass->InstanceKlass renaming
Reviewed-by: stefank, jmasa
author | coleenp |
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date | Fri, 07 Sep 2012 12:04:16 -0400 |
parents | da91efe96a93 |
children | fb19af007ffc |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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" | |
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33 #include "oops/method.hpp" |
1972 | 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 | |
3960 | 52 #ifdef TARGET_OS_FAMILY_bsd |
53 # include "os_bsd.inline.hpp" | |
54 #endif | |
0 | 55 |
56 | |
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57 static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) { |
0 | 58 char* bytes = (char*)name->bytes() + begin; |
59 char* end_bytes = (char*)name->bytes() + end; | |
60 while (bytes < end_bytes) { | |
61 jchar c; | |
62 bytes = UTF8::next(bytes, &c); | |
63 if (c <= 0x7f && isalnum(c)) { | |
64 st->put((char) c); | |
65 } else { | |
66 if (c == '_') st->print("_1"); | |
67 else if (c == '/') st->print("_"); | |
68 else if (c == ';') st->print("_2"); | |
69 else if (c == '[') st->print("_3"); | |
70 else st->print("_%.5x", c); | |
71 } | |
72 } | |
73 } | |
74 | |
75 | |
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76 static void mangle_name_on(outputStream* st, Symbol* name) { |
0 | 77 mangle_name_on(st, name, 0, name->utf8_length()); |
78 } | |
79 | |
80 | |
81 char* NativeLookup::pure_jni_name(methodHandle method) { | |
82 stringStream st; | |
83 // Prefix | |
84 st.print("Java_"); | |
85 // Klass name | |
86 mangle_name_on(&st, method->klass_name()); | |
87 st.print("_"); | |
88 // Method name | |
89 mangle_name_on(&st, method->name()); | |
90 return st.as_string(); | |
91 } | |
92 | |
93 | |
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94 char* NativeLookup::critical_jni_name(methodHandle method) { |
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95 stringStream st; |
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96 // Prefix |
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97 st.print("JavaCritical_"); |
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98 // Klass name |
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99 mangle_name_on(&st, method->klass_name()); |
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100 st.print("_"); |
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101 // Method name |
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102 mangle_name_on(&st, method->name()); |
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103 return st.as_string(); |
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104 } |
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105 |
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106 |
0 | 107 char* NativeLookup::long_jni_name(methodHandle method) { |
108 // Signature ignore the wrapping parenteses and the trailing return type | |
109 stringStream st; | |
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110 Symbol* signature = method->signature(); |
0 | 111 st.print("__"); |
112 // find ')' | |
113 int end; | |
114 for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++); | |
115 // skip first '(' | |
116 mangle_name_on(&st, signature, 1, end); | |
117 return st.as_string(); | |
118 } | |
119 | |
120 extern "C" { | |
121 void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls); | |
710 | 122 void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls); |
0 | 123 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass); |
5915 | 124 void JNICALL JVM_RegisterWhiteBoxMethods(JNIEnv *env, jclass wbclass); |
0 | 125 } |
126 | |
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127 #define CC (char*) /* cast a literal from (const char*) */ |
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128 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
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129 |
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130 static JNINativeMethod lookup_special_native_methods[] = { |
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131 // Next two functions only exist for compatibility with 1.3.1 and earlier. |
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132 { CC"Java_java_io_ObjectOutputStream_getPrimitiveFieldValues", NULL, FN_PTR(JVM_GetPrimitiveFieldValues) }, // intercept ObjectOutputStream getPrimitiveFieldValues for faster serialization |
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133 { CC"Java_java_io_ObjectInputStream_setPrimitiveFieldValues", NULL, FN_PTR(JVM_SetPrimitiveFieldValues) }, // intercept ObjectInputStream setPrimitiveFieldValues for faster serialization |
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134 |
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135 { CC"Java_sun_misc_Unsafe_registerNatives", NULL, FN_PTR(JVM_RegisterUnsafeMethods) }, |
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136 { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) }, |
5915 | 137 { CC"Java_sun_misc_Perf_registerNatives", NULL, FN_PTR(JVM_RegisterPerfMethods) }, |
138 { CC"Java_sun_hotspot_WhiteBox_registerNatives", NULL, FN_PTR(JVM_RegisterWhiteBoxMethods) }, | |
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139 }; |
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140 |
0 | 141 static address lookup_special_native(char* jni_name) { |
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142 int i = !JDK_Version::is_gte_jdk14x_version() ? 0 : 2; // see comment in lookup_special_native_methods |
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143 int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod); |
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144 for (; i < count; i++) { |
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145 // NB: To ignore the jni prefix and jni postfix strstr is used matching. |
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146 if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) { |
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147 return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr); |
0 | 148 } |
149 } | |
150 return NULL; | |
151 } | |
152 | |
153 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) { | |
154 address entry; | |
155 // Compute complete JNI name for style | |
156 stringStream st; | |
157 if (os_style) os::print_jni_name_prefix_on(&st, args_size); | |
158 st.print_raw(pure_name); | |
159 st.print_raw(long_name); | |
160 if (os_style) os::print_jni_name_suffix_on(&st, args_size); | |
161 char* jni_name = st.as_string(); | |
162 | |
163 // If the loader is null we have a system class, so we attempt a lookup in | |
164 // the native Java library. This takes care of any bootstrapping problems. | |
165 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find | |
166 // gets found the first time around - otherwise an infinite loop can occure. This is | |
167 // another VM/library dependency | |
168 Handle loader(THREAD, | |
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169 InstanceKlass::cast(method->method_holder())->class_loader()); |
0 | 170 if (loader.is_null()) { |
171 entry = lookup_special_native(jni_name); | |
172 if (entry == NULL) { | |
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173 entry = (address) os::dll_lookup(os::native_java_library(), jni_name); |
0 | 174 } |
175 if (entry != NULL) { | |
176 in_base_library = true; | |
177 return entry; | |
178 } | |
179 } | |
180 | |
181 // Otherwise call static method findNative in ClassLoader | |
1142 | 182 KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass()); |
0 | 183 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL); |
184 | |
185 JavaValue result(T_LONG); | |
186 JavaCalls::call_static(&result, | |
187 klass, | |
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188 vmSymbols::findNative_name(), |
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189 vmSymbols::classloader_string_long_signature(), |
0 | 190 // Arguments |
191 loader, | |
192 name_arg, | |
193 CHECK_NULL); | |
194 entry = (address) (intptr_t) result.get_jlong(); | |
195 | |
196 if (entry == NULL) { | |
197 // findNative didn't find it, if there are any agent libraries look in them | |
198 AgentLibrary* agent; | |
199 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
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200 entry = (address) os::dll_lookup(agent->os_lib(), jni_name); |
0 | 201 if (entry != NULL) { |
202 return entry; | |
203 } | |
204 } | |
205 } | |
206 | |
207 return entry; | |
208 } | |
209 | |
210 | |
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211 address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) { |
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212 if (!method->has_native_function()) { |
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213 return NULL; |
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214 } |
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215 |
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216 address current_entry = method->native_function(); |
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217 |
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218 char dll_name[JVM_MAXPATHLEN]; |
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219 int offset; |
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220 if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) { |
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221 char ebuf[32]; |
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222 void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf)); |
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223 if (dll != NULL) { |
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224 // Compute complete JNI name for style |
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225 stringStream st; |
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226 if (os_style) os::print_jni_name_prefix_on(&st, args_size); |
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227 st.print_raw(pure_name); |
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228 st.print_raw(long_name); |
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229 if (os_style) os::print_jni_name_suffix_on(&st, args_size); |
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230 char* jni_name = st.as_string(); |
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231 return (address)os::dll_lookup(dll, jni_name); |
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232 } |
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233 } |
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234 |
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235 return NULL; |
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236 } |
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237 |
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238 |
0 | 239 // Check all the formats of native implementation name to see if there is one |
240 // for the specified method. | |
241 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) { | |
242 address entry = NULL; | |
243 in_base_library = false; | |
244 // Compute pure name | |
245 char* pure_name = pure_jni_name(method); | |
246 | |
247 // Compute argument size | |
248 int args_size = 1 // JNIEnv | |
249 + (method->is_static() ? 1 : 0) // class for static methods | |
250 + method->size_of_parameters(); // actual parameters | |
251 | |
252 | |
253 // 1) Try JNI short style | |
254 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL); | |
255 if (entry != NULL) return entry; | |
256 | |
257 // Compute long name | |
258 char* long_name = long_jni_name(method); | |
259 | |
260 // 2) Try JNI long style | |
261 entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL); | |
262 if (entry != NULL) return entry; | |
263 | |
264 // 3) Try JNI short style without os prefix/suffix | |
265 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL); | |
266 if (entry != NULL) return entry; | |
267 | |
268 // 4) Try JNI long style without os prefix/suffix | |
269 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL); | |
270 | |
271 return entry; // NULL indicates not found | |
272 } | |
273 | |
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274 // Check all the formats of native implementation name to see if there is one |
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275 // for the specified method. |
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276 address NativeLookup::lookup_critical_entry(methodHandle method) { |
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277 if (!CriticalJNINatives) return NULL; |
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278 |
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279 if (method->is_synchronized() || |
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280 !method->is_static()) { |
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281 // Only static non-synchronized methods are allowed |
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282 return NULL; |
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283 } |
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284 |
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285 ResourceMark rm; |
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286 address entry = NULL; |
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287 |
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288 Symbol* signature = method->signature(); |
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289 for (int end = 0; end < signature->utf8_length(); end++) { |
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290 if (signature->byte_at(end) == 'L') { |
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291 // Don't allow object types |
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292 return NULL; |
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293 } |
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294 } |
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295 |
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296 // Compute critical name |
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297 char* critical_name = critical_jni_name(method); |
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298 |
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299 // Compute argument size |
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300 int args_size = 1 // JNIEnv |
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301 + (method->is_static() ? 1 : 0) // class for static methods |
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302 + method->size_of_parameters(); // actual parameters |
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303 |
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304 |
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305 // 1) Try JNI short style |
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306 entry = lookup_critical_style(method, critical_name, "", args_size, true); |
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307 if (entry != NULL) return entry; |
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308 |
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309 // Compute long name |
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310 char* long_name = long_jni_name(method); |
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311 |
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312 // 2) Try JNI long style |
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313 entry = lookup_critical_style(method, critical_name, long_name, args_size, true); |
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314 if (entry != NULL) return entry; |
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315 |
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316 // 3) Try JNI short style without os prefix/suffix |
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317 entry = lookup_critical_style(method, critical_name, "", args_size, false); |
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318 if (entry != NULL) return entry; |
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319 |
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320 // 4) Try JNI long style without os prefix/suffix |
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321 entry = lookup_critical_style(method, critical_name, long_name, args_size, false); |
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322 |
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323 return entry; // NULL indicates not found |
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324 } |
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325 |
0 | 326 // Check if there are any JVM TI prefixes which have been applied to the native method name. |
327 // If any are found, remove them before attemping the look up of the | |
328 // native implementation again. | |
329 // See SetNativeMethodPrefix in the JVM TI Spec for more details. | |
330 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) { | |
331 ResourceMark rm(THREAD); | |
332 | |
333 int prefix_count; | |
334 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
335 char* in_name = method->name()->as_C_string(); | |
336 char* wrapper_name = in_name; | |
337 // last applied prefix will be first -- go backwards | |
338 for (int i = prefix_count-1; i >= 0; i--) { | |
339 char* prefix = prefixes[i]; | |
340 size_t prefix_len = strlen(prefix); | |
341 if (strncmp(prefix, wrapper_name, prefix_len) == 0) { | |
342 // has this prefix remove it | |
343 wrapper_name += prefix_len; | |
344 } | |
345 } | |
346 if (wrapper_name != in_name) { | |
347 // we have a name for a wrapping method | |
348 int wrapper_name_len = (int)strlen(wrapper_name); | |
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349 TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len); |
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350 if (wrapper_symbol != NULL) { |
0 | 351 KlassHandle kh(method->method_holder()); |
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352 Method* wrapper_method = Klass::cast(kh())->lookup_method(wrapper_symbol, |
0 | 353 method->signature()); |
354 if (wrapper_method != NULL && !wrapper_method->is_native()) { | |
355 // we found a wrapper method, use its native entry | |
356 method->set_is_prefixed_native(); | |
357 return lookup_entry(wrapper_method, in_base_library, THREAD); | |
358 } | |
359 } | |
360 } | |
361 return NULL; | |
362 } | |
363 | |
364 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) { | |
365 address entry = NULL; | |
366 ResourceMark rm(THREAD); | |
367 | |
368 entry = lookup_entry(method, in_base_library, THREAD); | |
369 if (entry != NULL) return entry; | |
370 | |
371 // standard native method resolution has failed. Check if there are any | |
372 // JVM TI prefixes which have been applied to the native method name. | |
373 entry = lookup_entry_prefixed(method, in_base_library, THREAD); | |
374 if (entry != NULL) return entry; | |
375 | |
376 // Native function not found, throw UnsatisfiedLinkError | |
377 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(), | |
378 method->name_and_sig_as_C_string()); | |
379 } | |
380 | |
381 | |
382 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) { | |
383 if (!method->has_native_function()) { | |
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384 address entry = |
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385 method->intrinsic_id() == vmIntrinsics::_invokeGeneric ? |
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386 SharedRuntime::native_method_throw_unsupported_operation_exception_entry() : |
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387 lookup_base(method, in_base_library, CHECK_NULL); |
0 | 388 method->set_native_function(entry, |
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389 Method::native_bind_event_is_interesting); |
0 | 390 // -verbose:jni printing |
391 if (PrintJNIResolving) { | |
392 ResourceMark rm(THREAD); | |
393 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]", | |
394 Klass::cast(method->method_holder())->external_name(), | |
395 method->name()->as_C_string()); | |
396 } | |
397 } | |
398 return method->native_function(); | |
399 } | |
400 | |
401 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) { | |
402 EXCEPTION_MARK; | |
403 bool in_base_library = true; // SharedRuntime inits some math methods. | |
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404 TempNewSymbol c_name = SymbolTable::new_symbol(class_name, CATCH); |
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405 TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH); |
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406 TempNewSymbol s_name = SymbolTable::new_symbol(signature, CATCH); |
0 | 407 |
408 // Find the class | |
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409 Klass* k = SystemDictionary::resolve_or_fail(c_name, true, CATCH); |
0 | 410 instanceKlassHandle klass (THREAD, k); |
411 | |
412 // Find method and invoke standard lookup | |
413 methodHandle method (THREAD, | |
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414 klass->uncached_lookup_method(m_name, s_name)); |
0 | 415 address result = lookup(method, in_base_library, CATCH); |
416 assert(in_base_library, "must be in basic library"); | |
417 guarantee(result != NULL, "must be non NULL"); | |
418 return result; | |
419 } |