annotate src/share/vm/prims/nativeLookup.cpp @ 16006:66a9286203a2

decoupled Graal runtime initialization and Graal compilation queue initialization
author Doug Simon <doug.simon@oracle.com>
date Tue, 03 Jun 2014 11:51:27 +0200
parents 6aa352b260f4
children ad431bf0de07
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1 /*
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Gilles Duboscq <duboscq@ssw.jku.at>
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "classfile/javaClasses.hpp"
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27 #include "classfile/systemDictionary.hpp"
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28 #include "classfile/vmSymbols.hpp"
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29 #include "memory/oopFactory.hpp"
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30 #include "memory/resourceArea.hpp"
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31 #include "memory/universe.inline.hpp"
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32 #include "oops/instanceKlass.hpp"
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33 #include "oops/method.hpp"
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34 #include "oops/oop.inline.hpp"
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35 #include "oops/symbol.hpp"
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36 #include "prims/jvm_misc.hpp"
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37 #include "prims/nativeLookup.hpp"
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38 #include "runtime/arguments.hpp"
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39 #include "runtime/handles.inline.hpp"
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40 #include "runtime/javaCalls.hpp"
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41 #include "runtime/sharedRuntime.hpp"
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42 #include "runtime/signature.hpp"
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43 #include "utilities/macros.hpp"
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44 #ifdef TARGET_OS_FAMILY_linux
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45 # include "os_linux.inline.hpp"
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46 #endif
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47 #ifdef TARGET_OS_FAMILY_solaris
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48 # include "os_solaris.inline.hpp"
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49 #endif
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50 #ifdef TARGET_OS_FAMILY_windows
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51 # include "os_windows.inline.hpp"
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52 #endif
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53 #ifdef TARGET_OS_FAMILY_bsd
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54 # include "os_bsd.inline.hpp"
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55 #endif
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57
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58 static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) {
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59 char* bytes = (char*)name->bytes() + begin;
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60 char* end_bytes = (char*)name->bytes() + end;
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61 while (bytes < end_bytes) {
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62 jchar c;
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63 bytes = UTF8::next(bytes, &c);
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64 if (c <= 0x7f && isalnum(c)) {
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65 st->put((char) c);
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66 } else {
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67 if (c == '_') st->print("_1");
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68 else if (c == '/') st->print("_");
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69 else if (c == ';') st->print("_2");
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70 else if (c == '[') st->print("_3");
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71 else st->print("_%.5x", c);
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72 }
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73 }
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74 }
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76
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77 static void mangle_name_on(outputStream* st, Symbol* name) {
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78 mangle_name_on(st, name, 0, name->utf8_length());
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79 }
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81
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82 char* NativeLookup::pure_jni_name(methodHandle method) {
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83 stringStream st;
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84 // Prefix
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85 st.print("Java_");
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86 // Klass name
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87 mangle_name_on(&st, method->klass_name());
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88 st.print("_");
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89 // Method name
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90 mangle_name_on(&st, method->name());
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91 return st.as_string();
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92 }
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93
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94
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95 char* NativeLookup::critical_jni_name(methodHandle method) {
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96 stringStream st;
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97 // Prefix
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98 st.print("JavaCritical_");
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99 // Klass name
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100 mangle_name_on(&st, method->klass_name());
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101 st.print("_");
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102 // Method name
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103 mangle_name_on(&st, method->name());
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104 return st.as_string();
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105 }
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106
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107
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108 char* NativeLookup::long_jni_name(methodHandle method) {
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109 // Signature ignore the wrapping parenteses and the trailing return type
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110 stringStream st;
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111 Symbol* signature = method->signature();
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112 st.print("__");
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113 // find ')'
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114 int end;
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115 for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++);
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116 // skip first '('
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117 mangle_name_on(&st, signature, 1, end);
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118 return st.as_string();
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119 }
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120
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121 extern "C" {
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122 void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls);
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123 void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls);
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124 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass);
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125 void JNICALL JVM_RegisterWhiteBoxMethods(JNIEnv *env, jclass wbclass);
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126 #ifdef GRAAL
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127 void JNICALL JVM_InitializeGraalNatives(JNIEnv *env, jclass compilerToVMClass);
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128 jobject JNICALL JVM_GetGraalRuntime(JNIEnv *env, jclass c);
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129 jobject JNICALL JVM_GetGraalServiceImpls(JNIEnv *env, jclass c);
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130 jobject JNICALL JVM_CreateTruffleRuntime(JNIEnv *env, jclass c);
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131 jboolean JNICALL JVM_ParseGraalOptions(JNIEnv *env, jclass hotspotOptionsClass);
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132 #ifdef COMPILERGRAAL
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133 void JNICALL JVM_PrintAndResetGraalCompRate(JNIEnv *env, jclass c);
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134 #endif
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135 #endif
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136 }
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137
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138 #define CC (char*) /* cast a literal from (const char*) */
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139 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
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140
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141 static JNINativeMethod lookup_special_native_methods[] = {
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142 { CC"Java_sun_misc_Unsafe_registerNatives", NULL, FN_PTR(JVM_RegisterUnsafeMethods) },
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143 { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) },
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144 { CC"Java_sun_misc_Perf_registerNatives", NULL, FN_PTR(JVM_RegisterPerfMethods) },
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145 { CC"Java_sun_hotspot_WhiteBox_registerNatives", NULL, FN_PTR(JVM_RegisterWhiteBoxMethods) },
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146 #ifdef GRAAL
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147 { CC"Java_com_oracle_graal_api_runtime_Graal_initializeRuntime", NULL, FN_PTR(JVM_GetGraalRuntime) },
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148 { CC"Java_com_oracle_graal_api_runtime_Services_getServiceImpls", NULL, FN_PTR(JVM_GetGraalServiceImpls) },
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149 { CC"Java_com_oracle_truffle_api_Truffle_createRuntime", NULL, FN_PTR(JVM_CreateTruffleRuntime) },
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150 { CC"Java_com_oracle_graal_hotspot_bridge_CompilerToVMImpl_init", NULL, FN_PTR(JVM_InitializeGraalNatives) },
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151 { CC"Java_com_oracle_graal_hotspot_HotSpotOptions_parseVMOptions", NULL, FN_PTR(JVM_ParseGraalOptions) },
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152 #ifdef COMPILERGRAAL
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153 { CC"Java_com_oracle_graal_hotspot_CompilationQueue_printAndResetCompRate", NULL, FN_PTR(JVM_PrintAndResetGraalCompRate)},
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154 #endif
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155 #endif
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156 };
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157
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158 static address lookup_special_native(char* jni_name) {
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159 int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod);
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160 for (int i = 0; i < count; i++) {
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161 // NB: To ignore the jni prefix and jni postfix strstr is used matching.
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162 if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) {
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163 return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr);
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164 }
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165 }
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166 return NULL;
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167 }
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168
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169 address NativeLookup::lookup_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style, bool& in_base_library, TRAPS) {
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170 address entry;
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171 // Compute complete JNI name for style
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172 stringStream st;
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173 if (os_style) os::print_jni_name_prefix_on(&st, args_size);
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174 st.print_raw(pure_name);
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175 st.print_raw(long_name);
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176 if (os_style) os::print_jni_name_suffix_on(&st, args_size);
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177 char* jni_name = st.as_string();
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178
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179 // If the loader is null we have a system class, so we attempt a lookup in
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180 // the native Java library. This takes care of any bootstrapping problems.
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181 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find
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182 // gets found the first time around - otherwise an infinite loop can occure. This is
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183 // another VM/library dependency
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184 Handle loader(THREAD, method->method_holder()->class_loader());
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185 if (loader.is_null()) {
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186 entry = lookup_special_native(jni_name);
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187 if (entry == NULL) {
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188 entry = (address) os::dll_lookup(os::native_java_library(), jni_name);
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189 }
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190 if (entry != NULL) {
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191 in_base_library = true;
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192 return entry;
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193 }
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194 }
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195
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196 // Otherwise call static method findNative in ClassLoader
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197 KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass());
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198 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL);
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199
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200 JavaValue result(T_LONG);
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201 JavaCalls::call_static(&result,
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202 klass,
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203 vmSymbols::findNative_name(),
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204 vmSymbols::classloader_string_long_signature(),
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205 // Arguments
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206 loader,
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207 name_arg,
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208 CHECK_NULL);
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209 entry = (address) (intptr_t) result.get_jlong();
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210
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211 if (entry == NULL) {
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212 // findNative didn't find it, if there are any agent libraries look in them
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213 AgentLibrary* agent;
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214 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
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215 entry = (address) os::dll_lookup(agent->os_lib(), jni_name);
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216 if (entry != NULL) {
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217 return entry;
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218 }
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219 }
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220 }
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221
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222 return entry;
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223 }
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224
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225
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226 address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) {
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227 if (!method->has_native_function()) {
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228 return NULL;
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229 }
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230
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231 address current_entry = method->native_function();
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232
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233 char dll_name[JVM_MAXPATHLEN];
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234 int offset;
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235 if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) {
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236 char ebuf[32];
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237 void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf));
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238 if (dll != NULL) {
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239 // Compute complete JNI name for style
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240 stringStream st;
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241 if (os_style) os::print_jni_name_prefix_on(&st, args_size);
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242 st.print_raw(pure_name);
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243 st.print_raw(long_name);
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244 if (os_style) os::print_jni_name_suffix_on(&st, args_size);
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245 char* jni_name = st.as_string();
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246 return (address)os::dll_lookup(dll, jni_name);
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247 }
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248 }
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249
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250 return NULL;
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251 }
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252
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253
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254 // Check all the formats of native implementation name to see if there is one
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255 // for the specified method.
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256 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) {
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257 address entry = NULL;
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258 in_base_library = false;
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259 // Compute pure name
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260 char* pure_name = pure_jni_name(method);
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261
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262 // Compute argument size
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263 int args_size = 1 // JNIEnv
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264 + (method->is_static() ? 1 : 0) // class for static methods
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265 + method->size_of_parameters(); // actual parameters
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266
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267
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268 // 1) Try JNI short style
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269 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL);
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270 if (entry != NULL) return entry;
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271
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272 // Compute long name
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273 char* long_name = long_jni_name(method);
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274
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275 // 2) Try JNI long style
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276 entry = lookup_style(method, pure_name, long_name, args_size, true, in_base_library, CHECK_NULL);
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277 if (entry != NULL) return entry;
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278
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279 // 3) Try JNI short style without os prefix/suffix
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280 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL);
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281 if (entry != NULL) return entry;
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282
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283 // 4) Try JNI long style without os prefix/suffix
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284 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL);
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285
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286 return entry; // NULL indicates not found
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287 }
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288
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289 // Check all the formats of native implementation name to see if there is one
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290 // for the specified method.
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291 address NativeLookup::lookup_critical_entry(methodHandle method) {
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292 if (!CriticalJNINatives) return NULL;
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293
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294 if (method->is_synchronized() ||
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295 !method->is_static()) {
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296 // Only static non-synchronized methods are allowed
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297 return NULL;
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298 }
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299
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300 ResourceMark rm;
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301 address entry = NULL;
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302
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303 Symbol* signature = method->signature();
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304 for (int end = 0; end < signature->utf8_length(); end++) {
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305 if (signature->byte_at(end) == 'L') {
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306 // Don't allow object types
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307 return NULL;
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308 }
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309 }
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310
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311 // Compute critical name
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312 char* critical_name = critical_jni_name(method);
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313
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314 // Compute argument size
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315 int args_size = 1 // JNIEnv
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316 + (method->is_static() ? 1 : 0) // class for static methods
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317 + method->size_of_parameters(); // actual parameters
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318
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319
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320 // 1) Try JNI short style
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321 entry = lookup_critical_style(method, critical_name, "", args_size, true);
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322 if (entry != NULL) return entry;
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323
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324 // Compute long name
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325 char* long_name = long_jni_name(method);
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326
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327 // 2) Try JNI long style
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328 entry = lookup_critical_style(method, critical_name, long_name, args_size, true);
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329 if (entry != NULL) return entry;
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330
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331 // 3) Try JNI short style without os prefix/suffix
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332 entry = lookup_critical_style(method, critical_name, "", args_size, false);
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333 if (entry != NULL) return entry;
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334
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335 // 4) Try JNI long style without os prefix/suffix
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336 entry = lookup_critical_style(method, critical_name, long_name, args_size, false);
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337
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338 return entry; // NULL indicates not found
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339 }
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340
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341 // Check if there are any JVM TI prefixes which have been applied to the native method name.
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342 // If any are found, remove them before attemping the look up of the
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343 // native implementation again.
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344 // See SetNativeMethodPrefix in the JVM TI Spec for more details.
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345 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) {
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346 #if INCLUDE_JVMTI
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347 ResourceMark rm(THREAD);
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348
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349 int prefix_count;
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350 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
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351 char* in_name = method->name()->as_C_string();
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352 char* wrapper_name = in_name;
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353 // last applied prefix will be first -- go backwards
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354 for (int i = prefix_count-1; i >= 0; i--) {
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355 char* prefix = prefixes[i];
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356 size_t prefix_len = strlen(prefix);
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357 if (strncmp(prefix, wrapper_name, prefix_len) == 0) {
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358 // has this prefix remove it
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359 wrapper_name += prefix_len;
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360 }
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361 }
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362 if (wrapper_name != in_name) {
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363 // we have a name for a wrapping method
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364 int wrapper_name_len = (int)strlen(wrapper_name);
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coleenp
parents: 1980
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365 TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len);
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coleenp
parents: 1980
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366 if (wrapper_symbol != NULL) {
0
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367 KlassHandle kh(method->method_holder());
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070d523b96a7 8001471: Klass::cast() does nothing
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368 Method* wrapper_method = kh()->lookup_method(wrapper_symbol,
0
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369 method->signature());
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370 if (wrapper_method != NULL && !wrapper_method->is_native()) {
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371 // we found a wrapper method, use its native entry
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372 method->set_is_prefixed_native();
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373 return lookup_entry(wrapper_method, in_base_library, THREAD);
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374 }
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375 }
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376 }
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377 #endif // INCLUDE_JVMTI
0
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378 return NULL;
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379 }
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380
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381 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) {
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382 address entry = NULL;
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383 ResourceMark rm(THREAD);
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384
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385 entry = lookup_entry(method, in_base_library, THREAD);
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386 if (entry != NULL) return entry;
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387
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388 // standard native method resolution has failed. Check if there are any
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389 // JVM TI prefixes which have been applied to the native method name.
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390 entry = lookup_entry_prefixed(method, in_base_library, THREAD);
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391 if (entry != NULL) return entry;
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392
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393 // Native function not found, throw UnsatisfiedLinkError
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394 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(),
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395 method->name_and_sig_as_C_string());
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396 }
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397
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398
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399 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) {
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400 if (!method->has_native_function()) {
10276
f0bc60565ba8 7196277: JSR 292: Two jck/runtime tests crash on java.lang.invoke.MethodHandle.invokeExact
twisti
parents: 8001
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401 address entry = lookup_base(method, in_base_library, CHECK_NULL);
0
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402 method->set_native_function(entry,
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6271
diff changeset
403 Method::native_bind_event_is_interesting);
0
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parents:
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404 // -verbose:jni printing
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405 if (PrintJNIResolving) {
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406 ResourceMark rm(THREAD);
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407 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]",
6940
18fb7da42534 8000725: NPG: method_holder() and pool_holder() and pool_holder field should be InstanceKlass
coleenp
parents: 6854
diff changeset
408 method->method_holder()->external_name(),
0
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409 method->name()->as_C_string());
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410 }
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411 }
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412 return method->native_function();
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413 }
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414
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415 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) {
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416 EXCEPTION_MARK;
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417 bool in_base_library = true; // SharedRuntime inits some math methods.
2177
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1980
diff changeset
418 TempNewSymbol c_name = SymbolTable::new_symbol(class_name, CATCH);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1980
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419 TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH);
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1980
diff changeset
420 TempNewSymbol s_name = SymbolTable::new_symbol(signature, CATCH);
0
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parents:
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421
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422 // Find the class
6725
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory
coleenp
parents: 6271
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423 Klass* k = SystemDictionary::resolve_or_fail(c_name, true, CATCH);
0
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424 instanceKlassHandle klass (THREAD, k);
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425
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426 // Find method and invoke standard lookup
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427 methodHandle method (THREAD,
2177
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents: 1980
diff changeset
428 klass->uncached_lookup_method(m_name, s_name));
0
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429 address result = lookup(method, in_base_library, CATCH);
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430 assert(in_base_library, "must be in basic library");
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431 guarantee(result != NULL, "must be non NULL");
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432 return result;
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433 }