Wed, 01 Feb 2012 16:57:08 -0800
7013347: allow crypto functions to be called inline to enhance performance
Reviewed-by: kvn
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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"
33 #include "oops/methodOop.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "oops/symbol.hpp"
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
52 #ifdef TARGET_OS_FAMILY_bsd
53 # include "os_bsd.inline.hpp"
54 #endif
57 static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) {
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 }
76 static void mangle_name_on(outputStream* st, Symbol* name) {
77 mangle_name_on(st, name, 0, name->utf8_length());
78 }
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 }
94 char* NativeLookup::critical_jni_name(methodHandle method) {
95 stringStream st;
96 // Prefix
97 st.print("JavaCritical_");
98 // Klass name
99 mangle_name_on(&st, method->klass_name());
100 st.print("_");
101 // Method name
102 mangle_name_on(&st, method->name());
103 return st.as_string();
104 }
107 char* NativeLookup::long_jni_name(methodHandle method) {
108 // Signature ignore the wrapping parenteses and the trailing return type
109 stringStream st;
110 Symbol* signature = method->signature();
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 }
120 extern "C" {
121 void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls);
122 void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls);
123 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass);
124 }
126 #define CC (char*) /* cast a literal from (const char*) */
127 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
129 static JNINativeMethod lookup_special_native_methods[] = {
130 // Next two functions only exist for compatibility with 1.3.1 and earlier.
131 { CC"Java_java_io_ObjectOutputStream_getPrimitiveFieldValues", NULL, FN_PTR(JVM_GetPrimitiveFieldValues) }, // intercept ObjectOutputStream getPrimitiveFieldValues for faster serialization
132 { CC"Java_java_io_ObjectInputStream_setPrimitiveFieldValues", NULL, FN_PTR(JVM_SetPrimitiveFieldValues) }, // intercept ObjectInputStream setPrimitiveFieldValues for faster serialization
134 { CC"Java_sun_misc_Unsafe_registerNatives", NULL, FN_PTR(JVM_RegisterUnsafeMethods) },
135 { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) },
136 { CC"Java_sun_misc_Perf_registerNatives", NULL, FN_PTR(JVM_RegisterPerfMethods) }
137 };
139 static address lookup_special_native(char* jni_name) {
140 int i = !JDK_Version::is_gte_jdk14x_version() ? 0 : 2; // see comment in lookup_special_native_methods
141 int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod);
142 for (; i < count; i++) {
143 // NB: To ignore the jni prefix and jni postfix strstr is used matching.
144 if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) {
145 return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr);
146 }
147 }
148 return NULL;
149 }
151 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) {
152 address entry;
153 // Compute complete JNI name for style
154 stringStream st;
155 if (os_style) os::print_jni_name_prefix_on(&st, args_size);
156 st.print_raw(pure_name);
157 st.print_raw(long_name);
158 if (os_style) os::print_jni_name_suffix_on(&st, args_size);
159 char* jni_name = st.as_string();
161 // If the loader is null we have a system class, so we attempt a lookup in
162 // the native Java library. This takes care of any bootstrapping problems.
163 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find
164 // gets found the first time around - otherwise an infinite loop can occure. This is
165 // another VM/library dependency
166 Handle loader(THREAD,
167 instanceKlass::cast(method->method_holder())->class_loader());
168 if (loader.is_null()) {
169 entry = lookup_special_native(jni_name);
170 if (entry == NULL) {
171 entry = (address) os::dll_lookup(os::native_java_library(), jni_name);
172 }
173 if (entry != NULL) {
174 in_base_library = true;
175 return entry;
176 }
177 }
179 // Otherwise call static method findNative in ClassLoader
180 KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass());
181 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL);
183 JavaValue result(T_LONG);
184 JavaCalls::call_static(&result,
185 klass,
186 vmSymbols::findNative_name(),
187 vmSymbols::classloader_string_long_signature(),
188 // Arguments
189 loader,
190 name_arg,
191 CHECK_NULL);
192 entry = (address) (intptr_t) result.get_jlong();
194 if (entry == NULL) {
195 // findNative didn't find it, if there are any agent libraries look in them
196 AgentLibrary* agent;
197 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
198 entry = (address) os::dll_lookup(agent->os_lib(), jni_name);
199 if (entry != NULL) {
200 return entry;
201 }
202 }
203 }
205 return entry;
206 }
209 address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) {
210 if (!method->has_native_function()) {
211 return NULL;
212 }
214 address current_entry = method->native_function();
216 char dll_name[JVM_MAXPATHLEN];
217 int offset;
218 if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) {
219 char ebuf[32];
220 void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf));
221 if (dll != NULL) {
222 // Compute complete JNI name for style
223 stringStream st;
224 if (os_style) os::print_jni_name_prefix_on(&st, args_size);
225 st.print_raw(pure_name);
226 st.print_raw(long_name);
227 if (os_style) os::print_jni_name_suffix_on(&st, args_size);
228 char* jni_name = st.as_string();
229 return (address)os::dll_lookup(dll, jni_name);
230 }
231 }
233 return NULL;
234 }
237 // Check all the formats of native implementation name to see if there is one
238 // for the specified method.
239 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) {
240 address entry = NULL;
241 in_base_library = false;
242 // Compute pure name
243 char* pure_name = pure_jni_name(method);
245 // Compute argument size
246 int args_size = 1 // JNIEnv
247 + (method->is_static() ? 1 : 0) // class for static methods
248 + method->size_of_parameters(); // actual parameters
251 // 1) Try JNI short style
252 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL);
253 if (entry != NULL) return entry;
255 // Compute long name
256 char* long_name = long_jni_name(method);
258 // 2) Try JNI long style
259 entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL);
260 if (entry != NULL) return entry;
262 // 3) Try JNI short style without os prefix/suffix
263 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL);
264 if (entry != NULL) return entry;
266 // 4) Try JNI long style without os prefix/suffix
267 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL);
269 return entry; // NULL indicates not found
270 }
272 // Check all the formats of native implementation name to see if there is one
273 // for the specified method.
274 address NativeLookup::lookup_critical_entry(methodHandle method) {
275 if (!CriticalJNINatives) return NULL;
277 if (method->is_synchronized() ||
278 !method->is_static()) {
279 // Only static non-synchronized methods are allowed
280 return NULL;
281 }
283 ResourceMark rm;
284 address entry = NULL;
286 Symbol* signature = method->signature();
287 for (int end = 0; end < signature->utf8_length(); end++) {
288 if (signature->byte_at(end) == 'L') {
289 // Don't allow object types
290 return NULL;
291 }
292 }
294 // Compute critical name
295 char* critical_name = critical_jni_name(method);
297 // Compute argument size
298 int args_size = 1 // JNIEnv
299 + (method->is_static() ? 1 : 0) // class for static methods
300 + method->size_of_parameters(); // actual parameters
303 // 1) Try JNI short style
304 entry = lookup_critical_style(method, critical_name, "", args_size, true);
305 if (entry != NULL) return entry;
307 // Compute long name
308 char* long_name = long_jni_name(method);
310 // 2) Try JNI long style
311 entry = lookup_critical_style(method, critical_name, long_name, args_size, true);
312 if (entry != NULL) return entry;
314 // 3) Try JNI short style without os prefix/suffix
315 entry = lookup_critical_style(method, critical_name, "", args_size, false);
316 if (entry != NULL) return entry;
318 // 4) Try JNI long style without os prefix/suffix
319 entry = lookup_critical_style(method, critical_name, long_name, args_size, false);
321 return entry; // NULL indicates not found
322 }
324 // Check if there are any JVM TI prefixes which have been applied to the native method name.
325 // If any are found, remove them before attemping the look up of the
326 // native implementation again.
327 // See SetNativeMethodPrefix in the JVM TI Spec for more details.
328 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) {
329 ResourceMark rm(THREAD);
331 int prefix_count;
332 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
333 char* in_name = method->name()->as_C_string();
334 char* wrapper_name = in_name;
335 // last applied prefix will be first -- go backwards
336 for (int i = prefix_count-1; i >= 0; i--) {
337 char* prefix = prefixes[i];
338 size_t prefix_len = strlen(prefix);
339 if (strncmp(prefix, wrapper_name, prefix_len) == 0) {
340 // has this prefix remove it
341 wrapper_name += prefix_len;
342 }
343 }
344 if (wrapper_name != in_name) {
345 // we have a name for a wrapping method
346 int wrapper_name_len = (int)strlen(wrapper_name);
347 TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len);
348 if (wrapper_symbol != NULL) {
349 KlassHandle kh(method->method_holder());
350 methodOop wrapper_method = Klass::cast(kh())->lookup_method(wrapper_symbol,
351 method->signature());
352 if (wrapper_method != NULL && !wrapper_method->is_native()) {
353 // we found a wrapper method, use its native entry
354 method->set_is_prefixed_native();
355 return lookup_entry(wrapper_method, in_base_library, THREAD);
356 }
357 }
358 }
359 return NULL;
360 }
362 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) {
363 address entry = NULL;
364 ResourceMark rm(THREAD);
366 entry = lookup_entry(method, in_base_library, THREAD);
367 if (entry != NULL) return entry;
369 // standard native method resolution has failed. Check if there are any
370 // JVM TI prefixes which have been applied to the native method name.
371 entry = lookup_entry_prefixed(method, in_base_library, THREAD);
372 if (entry != NULL) return entry;
374 // Native function not found, throw UnsatisfiedLinkError
375 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(),
376 method->name_and_sig_as_C_string());
377 }
380 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) {
381 if (!method->has_native_function()) {
382 address entry = lookup_base(method, in_base_library, CHECK_NULL);
383 method->set_native_function(entry,
384 methodOopDesc::native_bind_event_is_interesting);
385 // -verbose:jni printing
386 if (PrintJNIResolving) {
387 ResourceMark rm(THREAD);
388 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]",
389 Klass::cast(method->method_holder())->external_name(),
390 method->name()->as_C_string());
391 }
392 }
393 return method->native_function();
394 }
396 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) {
397 EXCEPTION_MARK;
398 bool in_base_library = true; // SharedRuntime inits some math methods.
399 TempNewSymbol c_name = SymbolTable::new_symbol(class_name, CATCH);
400 TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH);
401 TempNewSymbol s_name = SymbolTable::new_symbol(signature, CATCH);
403 // Find the class
404 klassOop k = SystemDictionary::resolve_or_fail(c_name, true, CATCH);
405 instanceKlassHandle klass (THREAD, k);
407 // Find method and invoke standard lookup
408 methodHandle method (THREAD,
409 klass->uncached_lookup_method(m_name, s_name));
410 address result = lookup(method, in_base_library, CATCH);
411 assert(in_base_library, "must be in basic library");
412 guarantee(result != NULL, "must be non NULL");
413 return result;
414 }