Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/nativeLookup.cpp @ 24140:d4858e92c9b1
[GR-4077] support Graal.SDK on the boot class path and Truffle on a class path invisible to apps but visible to JVMCI
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 13 Jun 2017 14:22:54 +0200 |
parents | f84a5ac3be22 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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" | |
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43 #include "utilities/macros.hpp" |
1972 | 44 #ifdef TARGET_OS_FAMILY_linux |
45 # include "os_linux.inline.hpp" | |
46 #endif | |
47 #ifdef TARGET_OS_FAMILY_solaris | |
48 # include "os_solaris.inline.hpp" | |
49 #endif | |
50 #ifdef TARGET_OS_FAMILY_windows | |
51 # include "os_windows.inline.hpp" | |
52 #endif | |
14411 | 53 #ifdef TARGET_OS_FAMILY_aix |
54 # include "os_aix.inline.hpp" | |
55 #endif | |
3960 | 56 #ifdef TARGET_OS_FAMILY_bsd |
57 # include "os_bsd.inline.hpp" | |
58 #endif | |
0 | 59 |
60 | |
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61 static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) { |
0 | 62 char* bytes = (char*)name->bytes() + begin; |
63 char* end_bytes = (char*)name->bytes() + end; | |
64 while (bytes < end_bytes) { | |
65 jchar c; | |
66 bytes = UTF8::next(bytes, &c); | |
67 if (c <= 0x7f && isalnum(c)) { | |
68 st->put((char) c); | |
69 } else { | |
70 if (c == '_') st->print("_1"); | |
71 else if (c == '/') st->print("_"); | |
72 else if (c == ';') st->print("_2"); | |
73 else if (c == '[') st->print("_3"); | |
74 else st->print("_%.5x", c); | |
75 } | |
76 } | |
77 } | |
78 | |
79 | |
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80 static void mangle_name_on(outputStream* st, Symbol* name) { |
0 | 81 mangle_name_on(st, name, 0, name->utf8_length()); |
82 } | |
83 | |
84 | |
85 char* NativeLookup::pure_jni_name(methodHandle method) { | |
86 stringStream st; | |
87 // Prefix | |
88 st.print("Java_"); | |
89 // Klass name | |
90 mangle_name_on(&st, method->klass_name()); | |
91 st.print("_"); | |
92 // Method name | |
93 mangle_name_on(&st, method->name()); | |
94 return st.as_string(); | |
95 } | |
96 | |
97 | |
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98 char* NativeLookup::critical_jni_name(methodHandle method) { |
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99 stringStream st; |
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100 // Prefix |
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101 st.print("JavaCritical_"); |
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102 // Klass name |
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103 mangle_name_on(&st, method->klass_name()); |
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104 st.print("_"); |
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105 // Method name |
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106 mangle_name_on(&st, method->name()); |
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107 return st.as_string(); |
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108 } |
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109 |
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110 |
0 | 111 char* NativeLookup::long_jni_name(methodHandle method) { |
112 // Signature ignore the wrapping parenteses and the trailing return type | |
113 stringStream st; | |
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114 Symbol* signature = method->signature(); |
0 | 115 st.print("__"); |
116 // find ')' | |
117 int end; | |
118 for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++); | |
119 // skip first '(' | |
120 mangle_name_on(&st, signature, 1, end); | |
121 return st.as_string(); | |
122 } | |
123 | |
124 extern "C" { | |
125 void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls); | |
710 | 126 void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls); |
0 | 127 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass); |
5915 | 128 void JNICALL JVM_RegisterWhiteBoxMethods(JNIEnv *env, jclass wbclass); |
22298 | 129 #if INCLUDE_JVMCI |
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130 void JNICALL JVM_InitJVMCIClassLoader(JNIEnv *env, jclass c, jobject loader); |
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131 void JNICALL JVM_RegisterJVMCINatives(JNIEnv *env, jclass compilerToVMClass); |
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132 jobject JNICALL JVM_GetJVMCIRuntime(JNIEnv *env, jclass c); |
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133 jobject JNICALL JVM_GetJVMCIClassLoader(JNIEnv *env, jclass c); |
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134 #endif |
0 | 135 } |
136 | |
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137 #define CC (char*) /* cast a literal from (const char*) */ |
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138 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
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139 |
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140 static JNINativeMethod lookup_special_native_methods[] = { |
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141 { CC"Java_sun_misc_Unsafe_registerNatives", NULL, FN_PTR(JVM_RegisterUnsafeMethods) }, |
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142 { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) }, |
5915 | 143 { CC"Java_sun_misc_Perf_registerNatives", NULL, FN_PTR(JVM_RegisterPerfMethods) }, |
144 { CC"Java_sun_hotspot_WhiteBox_registerNatives", NULL, FN_PTR(JVM_RegisterWhiteBoxMethods) }, | |
22298 | 145 #if INCLUDE_JVMCI |
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146 { CC"Java_jdk_vm_ci_services_JVMCIClassLoaderFactory_init", NULL, FN_PTR(JVM_InitJVMCIClassLoader) }, |
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147 { CC"Java_jdk_vm_ci_runtime_JVMCI_initializeRuntime", NULL, FN_PTR(JVM_GetJVMCIRuntime) }, |
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148 { CC"Java_jdk_vm_ci_services_Services_getJVMCIClassLoader", NULL, FN_PTR(JVM_GetJVMCIClassLoader) }, |
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149 { CC"Java_jdk_vm_ci_hotspot_CompilerToVM_registerNatives", NULL, FN_PTR(JVM_RegisterJVMCINatives) }, |
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150 #endif |
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151 }; |
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152 |
0 | 153 static address lookup_special_native(char* jni_name) { |
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154 int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod); |
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155 for (int i = 0; i < count; i++) { |
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156 // NB: To ignore the jni prefix and jni postfix strstr is used matching. |
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157 if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) { |
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158 return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr); |
0 | 159 } |
160 } | |
161 return NULL; | |
162 } | |
163 | |
164 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) { | |
165 address entry; | |
166 // Compute complete JNI name for style | |
167 stringStream st; | |
168 if (os_style) os::print_jni_name_prefix_on(&st, args_size); | |
169 st.print_raw(pure_name); | |
170 st.print_raw(long_name); | |
171 if (os_style) os::print_jni_name_suffix_on(&st, args_size); | |
172 char* jni_name = st.as_string(); | |
173 | |
174 // If the loader is null we have a system class, so we attempt a lookup in | |
175 // the native Java library. This takes care of any bootstrapping problems. | |
176 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find | |
177 // gets found the first time around - otherwise an infinite loop can occure. This is | |
178 // another VM/library dependency | |
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179 Handle loader(THREAD, method->method_holder()->class_loader()); |
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180 if (loader.is_null() JVMCI_ONLY(|| loader() == SystemDictionary::jvmci_loader())) { |
0 | 181 entry = lookup_special_native(jni_name); |
182 if (entry == NULL) { | |
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183 entry = (address) os::dll_lookup(os::native_java_library(), jni_name); |
0 | 184 } |
185 if (entry != NULL) { | |
186 in_base_library = true; | |
187 return entry; | |
188 } | |
189 } | |
190 | |
191 // Otherwise call static method findNative in ClassLoader | |
1142 | 192 KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass()); |
0 | 193 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL); |
194 | |
195 JavaValue result(T_LONG); | |
196 JavaCalls::call_static(&result, | |
197 klass, | |
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198 vmSymbols::findNative_name(), |
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199 vmSymbols::classloader_string_long_signature(), |
0 | 200 // Arguments |
201 loader, | |
202 name_arg, | |
203 CHECK_NULL); | |
204 entry = (address) (intptr_t) result.get_jlong(); | |
205 | |
206 if (entry == NULL) { | |
207 // findNative didn't find it, if there are any agent libraries look in them | |
208 AgentLibrary* agent; | |
209 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
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210 entry = (address) os::dll_lookup(agent->os_lib(), jni_name); |
0 | 211 if (entry != NULL) { |
212 return entry; | |
213 } | |
214 } | |
215 } | |
216 | |
217 return entry; | |
218 } | |
219 | |
220 | |
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221 address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) { |
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222 if (!method->has_native_function()) { |
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223 return NULL; |
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224 } |
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225 |
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226 address current_entry = method->native_function(); |
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227 |
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228 char dll_name[JVM_MAXPATHLEN]; |
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229 int offset; |
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230 if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) { |
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231 char ebuf[32]; |
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232 void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf)); |
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233 if (dll != NULL) { |
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234 // Compute complete JNI name for style |
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235 stringStream st; |
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236 if (os_style) os::print_jni_name_prefix_on(&st, args_size); |
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237 st.print_raw(pure_name); |
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238 st.print_raw(long_name); |
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239 if (os_style) os::print_jni_name_suffix_on(&st, args_size); |
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240 char* jni_name = st.as_string(); |
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241 return (address)os::dll_lookup(dll, jni_name); |
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242 } |
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243 } |
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244 |
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245 return NULL; |
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246 } |
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247 |
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248 |
0 | 249 // Check all the formats of native implementation name to see if there is one |
250 // for the specified method. | |
251 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) { | |
252 address entry = NULL; | |
253 in_base_library = false; | |
254 // Compute pure name | |
255 char* pure_name = pure_jni_name(method); | |
256 | |
257 // Compute argument size | |
258 int args_size = 1 // JNIEnv | |
259 + (method->is_static() ? 1 : 0) // class for static methods | |
260 + method->size_of_parameters(); // actual parameters | |
261 | |
262 | |
263 // 1) Try JNI short style | |
264 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL); | |
265 if (entry != NULL) return entry; | |
266 | |
267 // Compute long name | |
268 char* long_name = long_jni_name(method); | |
269 | |
270 // 2) Try JNI long style | |
271 entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL); | |
272 if (entry != NULL) return entry; | |
273 | |
274 // 3) Try JNI short style without os prefix/suffix | |
275 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL); | |
276 if (entry != NULL) return entry; | |
277 | |
278 // 4) Try JNI long style without os prefix/suffix | |
279 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL); | |
280 | |
281 return entry; // NULL indicates not found | |
282 } | |
283 | |
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284 // Check all the formats of native implementation name to see if there is one |
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285 // for the specified method. |
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286 address NativeLookup::lookup_critical_entry(methodHandle method) { |
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287 if (!CriticalJNINatives) return NULL; |
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288 |
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289 if (method->is_synchronized() || |
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290 !method->is_static()) { |
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291 // Only static non-synchronized methods are allowed |
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292 return NULL; |
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293 } |
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294 |
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295 ResourceMark rm; |
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296 address entry = NULL; |
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297 |
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298 Symbol* signature = method->signature(); |
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299 for (int end = 0; end < signature->utf8_length(); end++) { |
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300 if (signature->byte_at(end) == 'L') { |
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301 // Don't allow object types |
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302 return NULL; |
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303 } |
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304 } |
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305 |
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306 // Compute critical name |
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307 char* critical_name = critical_jni_name(method); |
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308 |
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309 // Compute argument size |
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310 int args_size = 1 // JNIEnv |
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311 + (method->is_static() ? 1 : 0) // class for static methods |
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312 + method->size_of_parameters(); // actual parameters |
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313 |
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314 |
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315 // 1) Try JNI short style |
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316 entry = lookup_critical_style(method, critical_name, "", args_size, true); |
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317 if (entry != NULL) return entry; |
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318 |
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319 // Compute long name |
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320 char* long_name = long_jni_name(method); |
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321 |
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322 // 2) Try JNI long style |
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323 entry = lookup_critical_style(method, critical_name, long_name, args_size, true); |
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324 if (entry != NULL) return entry; |
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325 |
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326 // 3) Try JNI short style without os prefix/suffix |
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327 entry = lookup_critical_style(method, critical_name, "", args_size, false); |
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328 if (entry != NULL) return entry; |
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329 |
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330 // 4) Try JNI long style without os prefix/suffix |
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331 entry = lookup_critical_style(method, critical_name, long_name, args_size, false); |
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332 |
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333 return entry; // NULL indicates not found |
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334 } |
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335 |
0 | 336 // Check if there are any JVM TI prefixes which have been applied to the native method name. |
337 // If any are found, remove them before attemping the look up of the | |
338 // native implementation again. | |
339 // See SetNativeMethodPrefix in the JVM TI Spec for more details. | |
340 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) { | |
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341 #if INCLUDE_JVMTI |
0 | 342 ResourceMark rm(THREAD); |
343 | |
344 int prefix_count; | |
345 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count); | |
346 char* in_name = method->name()->as_C_string(); | |
347 char* wrapper_name = in_name; | |
348 // last applied prefix will be first -- go backwards | |
349 for (int i = prefix_count-1; i >= 0; i--) { | |
350 char* prefix = prefixes[i]; | |
351 size_t prefix_len = strlen(prefix); | |
352 if (strncmp(prefix, wrapper_name, prefix_len) == 0) { | |
353 // has this prefix remove it | |
354 wrapper_name += prefix_len; | |
355 } | |
356 } | |
357 if (wrapper_name != in_name) { | |
358 // we have a name for a wrapping method | |
359 int wrapper_name_len = (int)strlen(wrapper_name); | |
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360 TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len); |
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361 if (wrapper_symbol != NULL) { |
0 | 362 KlassHandle kh(method->method_holder()); |
6983 | 363 Method* wrapper_method = kh()->lookup_method(wrapper_symbol, |
0 | 364 method->signature()); |
365 if (wrapper_method != NULL && !wrapper_method->is_native()) { | |
366 // we found a wrapper method, use its native entry | |
367 method->set_is_prefixed_native(); | |
368 return lookup_entry(wrapper_method, in_base_library, THREAD); | |
369 } | |
370 } | |
371 } | |
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372 #endif // INCLUDE_JVMTI |
0 | 373 return NULL; |
374 } | |
375 | |
376 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) { | |
377 address entry = NULL; | |
378 ResourceMark rm(THREAD); | |
379 | |
380 entry = lookup_entry(method, in_base_library, THREAD); | |
381 if (entry != NULL) return entry; | |
382 | |
383 // standard native method resolution has failed. Check if there are any | |
384 // JVM TI prefixes which have been applied to the native method name. | |
385 entry = lookup_entry_prefixed(method, in_base_library, THREAD); | |
386 if (entry != NULL) return entry; | |
387 | |
388 // Native function not found, throw UnsatisfiedLinkError | |
389 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(), | |
390 method->name_and_sig_as_C_string()); | |
391 } | |
392 | |
393 | |
394 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) { | |
395 if (!method->has_native_function()) { | |
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396 address entry = lookup_base(method, in_base_library, CHECK_NULL); |
0 | 397 method->set_native_function(entry, |
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398 Method::native_bind_event_is_interesting); |
0 | 399 // -verbose:jni printing |
400 if (PrintJNIResolving) { | |
401 ResourceMark rm(THREAD); | |
402 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]", | |
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403 method->method_holder()->external_name(), |
0 | 404 method->name()->as_C_string()); |
405 } | |
406 } | |
407 return method->native_function(); | |
408 } | |
409 | |
410 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) { | |
411 EXCEPTION_MARK; | |
412 bool in_base_library = true; // SharedRuntime inits some math methods. | |
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413 TempNewSymbol c_name = SymbolTable::new_symbol(class_name, CATCH); |
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414 TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH); |
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415 TempNewSymbol s_name = SymbolTable::new_symbol(signature, CATCH); |
0 | 416 |
417 // Find the class | |
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418 Klass* k = SystemDictionary::resolve_or_fail(c_name, true, CATCH); |
0 | 419 instanceKlassHandle klass (THREAD, k); |
420 | |
421 // Find method and invoke standard lookup | |
422 methodHandle method (THREAD, | |
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423 klass->uncached_lookup_method(m_name, s_name, Klass::normal)); |
0 | 424 address result = lookup(method, in_base_library, CATCH); |
425 assert(in_base_library, "must be in basic library"); | |
426 guarantee(result != NULL, "must be non NULL"); | |
427 return result; | |
428 } |