jdk8-mips64-public/hotspot: src/share/vm/prims/nativeLookup.cpp@db9981fd3124

8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
Summary: Rename INCLUDE_ALTERNATE_GCS to INCLUDE_ALL_GCS and replace SERIALGC with INCLUDE_ALL_GCS.
Reviewed-by: coleenp, stefank

     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/method.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 #include "utilities/macros.hpp"

    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

    53 #ifdef TARGET_OS_FAMILY_bsd

    54 # include "os_bsd.inline.hpp"

    55 #endif

    58 static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) {

    59   char* bytes = (char*)name->bytes() + begin;

    60   char* end_bytes = (char*)name->bytes() + end;

    61   while (bytes < end_bytes) {

    62     jchar c;

    63     bytes = UTF8::next(bytes, &c);

    64     if (c <= 0x7f && isalnum(c)) {

    65       st->put((char) c);

    66     } else {

    67            if (c == '_') st->print("_1");

    68       else if (c == '/') st->print("_");

    69       else if (c == ';') st->print("_2");

    70       else if (c == '[') st->print("_3");

    71       else               st->print("_%.5x", c);

    72     }

    73   }

    74 }

    77 static void mangle_name_on(outputStream* st, Symbol* name) {

    78   mangle_name_on(st, name, 0, name->utf8_length());

    79 }

    82 char* NativeLookup::pure_jni_name(methodHandle method) {

    83   stringStream st;

    84   // Prefix

    85   st.print("Java_");

    86   // Klass name

    87   mangle_name_on(&st, method->klass_name());

    88   st.print("_");

    89   // Method name

    90   mangle_name_on(&st, method->name());

    91   return st.as_string();

    92 }

    95 char* NativeLookup::critical_jni_name(methodHandle method) {

    96   stringStream st;

    97   // Prefix

    98   st.print("JavaCritical_");

    99   // Klass name

   100   mangle_name_on(&st, method->klass_name());

   101   st.print("_");

   102   // Method name

   103   mangle_name_on(&st, method->name());

   104   return st.as_string();

   105 }

   108 char* NativeLookup::long_jni_name(methodHandle method) {

   109   // Signature ignore the wrapping parenteses and the trailing return type

   110   stringStream st;

   111   Symbol* signature = method->signature();

   112   st.print("__");

   113   // find ')'

   114   int end;

   115   for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++);

   116   // skip first '('

   117   mangle_name_on(&st, signature, 1, end);

   118   return st.as_string();

   119 }

   121 extern "C" {

   122   void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls);

   123   void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls);

   124   void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass);

   125   void JNICALL JVM_RegisterWhiteBoxMethods(JNIEnv *env, jclass wbclass);

   126 }

   128 #define CC (char*)  /* cast a literal from (const char*) */

   129 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)

   131 static JNINativeMethod lookup_special_native_methods[] = {

   132   // Next two functions only exist for compatibility with 1.3.1 and earlier.

   133   { CC"Java_java_io_ObjectOutputStream_getPrimitiveFieldValues",   NULL, FN_PTR(JVM_GetPrimitiveFieldValues)     },  // intercept ObjectOutputStream getPrimitiveFieldValues for faster serialization

   134   { CC"Java_java_io_ObjectInputStream_setPrimitiveFieldValues",    NULL, FN_PTR(JVM_SetPrimitiveFieldValues)     },  // intercept ObjectInputStream setPrimitiveFieldValues for faster serialization

   136   { CC"Java_sun_misc_Unsafe_registerNatives",                      NULL, FN_PTR(JVM_RegisterUnsafeMethods)       },

   137   { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) },

   138   { CC"Java_sun_misc_Perf_registerNatives",                        NULL, FN_PTR(JVM_RegisterPerfMethods)         },

   139   { CC"Java_sun_hotspot_WhiteBox_registerNatives",                 NULL, FN_PTR(JVM_RegisterWhiteBoxMethods)     },

   140 };

   142 static address lookup_special_native(char* jni_name) {

   143   int i = !JDK_Version::is_gte_jdk14x_version() ? 0 : 2;  // see comment in lookup_special_native_methods

   144   int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod);

   145   for (; i < count; i++) {

   146     // NB: To ignore the jni prefix and jni postfix strstr is used matching.

   147     if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) {

   148       return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr);

   149     }

   150   }

   151   return NULL;

   152 }

   154 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) {

   155   address entry;

   156   // Compute complete JNI name for style

   157   stringStream st;

   158   if (os_style) os::print_jni_name_prefix_on(&st, args_size);

   159   st.print_raw(pure_name);

   160   st.print_raw(long_name);

   161   if (os_style) os::print_jni_name_suffix_on(&st, args_size);

   162   char* jni_name = st.as_string();

   164   // If the loader is null we have a system class, so we attempt a lookup in

   165   // the native Java library. This takes care of any bootstrapping problems.

   166   // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find

   167   // gets found the first time around - otherwise an infinite loop can occure. This is

   168   // another VM/library dependency

   169   Handle loader(THREAD, method->method_holder()->class_loader());

   170   if (loader.is_null()) {

   171     entry = lookup_special_native(jni_name);

   172     if (entry == NULL) {

   173        entry = (address) os::dll_lookup(os::native_java_library(), jni_name);

   174     }

   175     if (entry != NULL) {

   176       in_base_library = true;

   177       return entry;

   178     }

   179   }

   181   // Otherwise call static method findNative in ClassLoader

   182   KlassHandle   klass (THREAD, SystemDictionary::ClassLoader_klass());

   183   Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL);

   185   JavaValue result(T_LONG);

   186   JavaCalls::call_static(&result,

   187                          klass,

   188                          vmSymbols::findNative_name(),

   189                          vmSymbols::classloader_string_long_signature(),

   190                          // Arguments

   191                          loader,

   192                          name_arg,

   193                          CHECK_NULL);

   194   entry = (address) (intptr_t) result.get_jlong();

   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()) {

   200       entry = (address) os::dll_lookup(agent->os_lib(), jni_name);

   201       if (entry != NULL) {

   202         return entry;

   203       }

   204     }

   205   }

   207   return entry;

   208 }

   211 address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) {

   212   if (!method->has_native_function()) {

   213     return NULL;

   214   }

   216   address current_entry = method->native_function();

   218   char dll_name[JVM_MAXPATHLEN];

   219   int offset;

   220   if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) {

   221     char ebuf[32];

   222     void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf));

   223     if (dll != NULL) {

   224       // Compute complete JNI name for style

   225       stringStream st;

   226       if (os_style) os::print_jni_name_prefix_on(&st, args_size);

   227       st.print_raw(pure_name);

   228       st.print_raw(long_name);

   229       if (os_style) os::print_jni_name_suffix_on(&st, args_size);

   230       char* jni_name = st.as_string();

   231       return (address)os::dll_lookup(dll, jni_name);

   232     }

   233   }

   235   return NULL;

   236 }

   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);

   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

   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;

   257   // Compute long name

   258   char* long_name = long_jni_name(method);

   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;

   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;

   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);

   271   return entry; // NULL indicates not found

   272 }

   274 // Check all the formats of native implementation name to see if there is one

   275 // for the specified method.

   276 address NativeLookup::lookup_critical_entry(methodHandle method) {

   277   if (!CriticalJNINatives) return NULL;

   279   if (method->is_synchronized() ||

   280       !method->is_static()) {

   281     // Only static non-synchronized methods are allowed

   282     return NULL;

   283   }

   285   ResourceMark rm;

   286   address entry = NULL;

   288   Symbol* signature = method->signature();

   289   for (int end = 0; end < signature->utf8_length(); end++) {

   290     if (signature->byte_at(end) == 'L') {

   291       // Don't allow object types

   292       return NULL;

   293     }

   294   }

   296   // Compute critical name

   297   char* critical_name = critical_jni_name(method);

   299   // Compute argument size

   300   int args_size = 1                             // JNIEnv

   301                 + (method->is_static() ? 1 : 0) // class for static methods

   302                 + method->size_of_parameters(); // actual parameters

   305   // 1) Try JNI short style

   306   entry = lookup_critical_style(method, critical_name, "",        args_size, true);

   307   if (entry != NULL) return entry;

   309   // Compute long name

   310   char* long_name = long_jni_name(method);

   312   // 2) Try JNI long style

   313   entry = lookup_critical_style(method, critical_name, long_name, args_size, true);

   314   if (entry != NULL) return entry;

   316   // 3) Try JNI short style without os prefix/suffix

   317   entry = lookup_critical_style(method, critical_name, "",        args_size, false);

   318   if (entry != NULL) return entry;

   320   // 4) Try JNI long style without os prefix/suffix

   321   entry = lookup_critical_style(method, critical_name, long_name, args_size, false);

   323   return entry; // NULL indicates not found

   324 }

   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 #if INCLUDE_JVMTI

   332   ResourceMark rm(THREAD);

   334   int prefix_count;

   335   char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);

   336   char* in_name = method->name()->as_C_string();

   337   char* wrapper_name = in_name;

   338   // last applied prefix will be first -- go backwards

   339   for (int i = prefix_count-1; i >= 0; i--) {

   340     char* prefix = prefixes[i];

   341     size_t prefix_len = strlen(prefix);

   342     if (strncmp(prefix, wrapper_name, prefix_len) == 0) {

   343       // has this prefix remove it

   344       wrapper_name += prefix_len;

   345     }

   346   }

   347   if (wrapper_name != in_name) {

   348     // we have a name for a wrapping method

   349     int wrapper_name_len = (int)strlen(wrapper_name);

   350     TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len);

   351     if (wrapper_symbol != NULL) {

   352       KlassHandle kh(method->method_holder());

   353       Method* wrapper_method = kh()->lookup_method(wrapper_symbol,

   354                                                                   method->signature());

   355       if (wrapper_method != NULL && !wrapper_method->is_native()) {

   356         // we found a wrapper method, use its native entry

   357         method->set_is_prefixed_native();

   358         return lookup_entry(wrapper_method, in_base_library, THREAD);

   359       }

   360     }

   361   }

   362 #endif // INCLUDE_JVMTI

   363   return NULL;

   364 }

   366 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) {

   367   address entry = NULL;

   368   ResourceMark rm(THREAD);

   370   entry = lookup_entry(method, in_base_library, THREAD);

   371   if (entry != NULL) return entry;

   373   // standard native method resolution has failed.  Check if there are any

   374   // JVM TI prefixes which have been applied to the native method name.

   375   entry = lookup_entry_prefixed(method, in_base_library, THREAD);

   376   if (entry != NULL) return entry;

   378   // Native function not found, throw UnsatisfiedLinkError

   379   THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(),

   380               method->name_and_sig_as_C_string());

   381 }

   384 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) {

   385   if (!method->has_native_function()) {

   386     address entry =

   387         method->intrinsic_id() == vmIntrinsics::_invokeGeneric ?

   388             SharedRuntime::native_method_throw_unsupported_operation_exception_entry() :

   389             lookup_base(method, in_base_library, CHECK_NULL);

   390     method->set_native_function(entry,

   391       Method::native_bind_event_is_interesting);

   392     // -verbose:jni printing

   393     if (PrintJNIResolving) {

   394       ResourceMark rm(THREAD);

   395       tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]",

   396         method->method_holder()->external_name(),

   397         method->name()->as_C_string());

   398     }

   399   }

   400   return method->native_function();

   401 }

   403 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) {

   404   EXCEPTION_MARK;

   405   bool in_base_library = true;  // SharedRuntime inits some math methods.

   406   TempNewSymbol c_name = SymbolTable::new_symbol(class_name,  CATCH);

   407   TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH);

   408   TempNewSymbol s_name = SymbolTable::new_symbol(signature,   CATCH);

   410   // Find the class

   411   Klass* k = SystemDictionary::resolve_or_fail(c_name, true, CATCH);

   412   instanceKlassHandle klass (THREAD, k);

   414   // Find method and invoke standard lookup

   415   methodHandle method (THREAD,

   416                        klass->uncached_lookup_method(m_name, s_name));

   417   address result = lookup(method, in_base_library, CATCH);

   418   assert(in_base_library, "must be in basic library");

   419   guarantee(result != NULL, "must be non NULL");

   420   return result;

   421 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/prims/nativeLookup.cpp@db9981fd3124

src/share/vm/prims/nativeLookup.cpp