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annotate src/share/vm/prims/nativeLookup.cpp @ 21519:cecb4e39521c

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Use files in lib/graal/options to define Graal options (-G:...) instead of generating code for them
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Wed, 27 May 2015 17:40:26 +0200
parents db0af0d8d623
children 47bebae7454f
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1 /*
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2 * Copyright (c) 1997, 2014, 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_aix
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54 # include "os_aix.inline.hpp"
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55 #endif
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56 #ifdef TARGET_OS_FAMILY_bsd
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57 # include "os_bsd.inline.hpp"
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58 #endif
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59
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60
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61 static void mangle_name_on(outputStream* st, Symbol* name, int begin, int end) {
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62 char* bytes = (char*)name->bytes() + begin;
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63 char* end_bytes = (char*)name->bytes() + end;
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64 while (bytes < end_bytes) {
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65 jchar c;
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66 bytes = UTF8::next(bytes, &c);
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67 if (c <= 0x7f && isalnum(c)) {
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68 st->put((char) c);
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69 } else {
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70 if (c == '_') st->print("_1");
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71 else if (c == '/') st->print("_");
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72 else if (c == ';') st->print("_2");
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73 else if (c == '[') st->print("_3");
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74 else st->print("_%.5x", c);
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75 }
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76 }
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77 }
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78
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79
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80 static void mangle_name_on(outputStream* st, Symbol* name) {
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81 mangle_name_on(st, name, 0, name->utf8_length());
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82 }
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83
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84
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85 char* NativeLookup::pure_jni_name(methodHandle method) {
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86 stringStream st;
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87 // Prefix
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88 st.print("Java_");
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89 // Klass name
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90 mangle_name_on(&st, method->klass_name());
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91 st.print("_");
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92 // Method name
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93 mangle_name_on(&st, method->name());
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94 return st.as_string();
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95 }
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96
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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
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111 char* NativeLookup::long_jni_name(methodHandle method) {
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112 // Signature ignore the wrapping parenteses and the trailing return type
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113 stringStream st;
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114 Symbol* signature = method->signature();
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115 st.print("__");
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116 // find ')'
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117 int end;
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118 for (end = 0; end < signature->utf8_length() && signature->byte_at(end) != ')'; end++);
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119 // skip first '('
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120 mangle_name_on(&st, signature, 1, end);
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121 return st.as_string();
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122 }
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123
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124 extern "C" {
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125 void JNICALL JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls);
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126 void JNICALL JVM_RegisterMethodHandleMethods(JNIEnv *env, jclass unsafecls);
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127 void JNICALL JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass);
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128 void JNICALL JVM_RegisterWhiteBoxMethods(JNIEnv *env, jclass wbclass);
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129 #ifdef GRAAL
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130 void JNICALL JVM_InitGraalClassLoader(JNIEnv *env, jclass c, jobject loader);
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131 void JNICALL JVM_InitializeGraalNatives(JNIEnv *env, jclass compilerToVMClass);
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132 jobject JNICALL JVM_GetGraalRuntime(JNIEnv *env, jclass c);
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133 jobject JNICALL JVM_GetGraalServiceImpls(JNIEnv *env, jclass c, jclass serviceClass);
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134 jobject JNICALL JVM_CreateTruffleRuntime(JNIEnv *env, jclass c);
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135 jobject JNICALL JVM_CreateNativeFunctionInterface(JNIEnv *env, jclass c);
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136 jboolean JNICALL JVM_IsCITimingEnabled(JNIEnv *env);
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137 #ifdef COMPILERGRAAL
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138 void JNICALL JVM_PrintAndResetGraalCompRate(JNIEnv *env, jclass c);
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139 #endif
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140 #endif
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141 }
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142
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143 #define CC (char*) /* cast a literal from (const char*) */
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144 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
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145
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146 static JNINativeMethod lookup_special_native_methods[] = {
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147 { CC"Java_sun_misc_Unsafe_registerNatives", NULL, FN_PTR(JVM_RegisterUnsafeMethods) },
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148 { CC"Java_java_lang_invoke_MethodHandleNatives_registerNatives", NULL, FN_PTR(JVM_RegisterMethodHandleMethods) },
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149 { CC"Java_sun_misc_Perf_registerNatives", NULL, FN_PTR(JVM_RegisterPerfMethods) },
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150 { CC"Java_sun_hotspot_WhiteBox_registerNatives", NULL, FN_PTR(JVM_RegisterWhiteBoxMethods) },
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151 #ifdef GRAAL
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152 { CC"Java_com_oracle_graal_hotspot_loader_Factory_init", NULL, FN_PTR(JVM_InitGraalClassLoader) },
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153 { CC"Java_com_oracle_graal_api_runtime_Graal_initializeRuntime", NULL, FN_PTR(JVM_GetGraalRuntime) },
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154 { CC"Java_com_oracle_graal_api_runtime_Services_getServiceImpls", NULL, FN_PTR(JVM_GetGraalServiceImpls) },
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155 { CC"Java_com_oracle_truffle_api_Truffle_createRuntime", NULL, FN_PTR(JVM_CreateTruffleRuntime) },
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156 { CC"Java_com_oracle_nfi_NativeFunctionInterfaceRuntime_createInterface", NULL, FN_PTR(JVM_CreateNativeFunctionInterface) },
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157 { CC"Java_com_oracle_graal_hotspot_bridge_CompilerToVMImpl_init", NULL, FN_PTR(JVM_InitializeGraalNatives) },
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158 { CC"Java_com_oracle_graal_hotspot_HotSpotOptions_isCITimingEnabled", NULL, FN_PTR(JVM_IsCITimingEnabled) },
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159 #endif
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160 };
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161
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162 static address lookup_special_native(char* jni_name) {
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163 int count = sizeof(lookup_special_native_methods) / sizeof(JNINativeMethod);
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164 for (int i = 0; i < count; i++) {
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165 // NB: To ignore the jni prefix and jni postfix strstr is used matching.
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166 if (strstr(jni_name, lookup_special_native_methods[i].name) != NULL) {
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167 return CAST_FROM_FN_PTR(address, lookup_special_native_methods[i].fnPtr);
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168 }
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169 }
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170 return NULL;
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171 }
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172
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173 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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174 address entry;
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175 // Compute complete JNI name for style
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176 stringStream st;
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177 if (os_style) os::print_jni_name_prefix_on(&st, args_size);
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178 st.print_raw(pure_name);
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179 st.print_raw(long_name);
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180 if (os_style) os::print_jni_name_suffix_on(&st, args_size);
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181 char* jni_name = st.as_string();
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182
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183 // If the loader is null we have a system class, so we attempt a lookup in
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184 // the native Java library. This takes care of any bootstrapping problems.
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185 // Note: It is critical for bootstrapping that Java_java_lang_ClassLoader_00024NativeLibrary_find
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186 // gets found the first time around - otherwise an infinite loop can occure. This is
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187 // another VM/library dependency
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188 Handle loader(THREAD, method->method_holder()->class_loader());
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189 if (loader.is_null() GRAAL_ONLY(|| loader() == SystemDictionary::graal_loader())) {
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190 entry = lookup_special_native(jni_name);
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191 if (entry == NULL) {
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192 entry = (address) os::dll_lookup(os::native_java_library(), jni_name);
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193 }
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194 if (entry != NULL) {
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195 in_base_library = true;
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196 return entry;
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197 }
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198 }
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199
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200 // Otherwise call static method findNative in ClassLoader
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201 KlassHandle klass (THREAD, SystemDictionary::ClassLoader_klass());
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202 Handle name_arg = java_lang_String::create_from_str(jni_name, CHECK_NULL);
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203
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204 JavaValue result(T_LONG);
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205 JavaCalls::call_static(&result,
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206 klass,
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207 vmSymbols::findNative_name(),
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208 vmSymbols::classloader_string_long_signature(),
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209 // Arguments
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210 loader,
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211 name_arg,
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212 CHECK_NULL);
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213 entry = (address) (intptr_t) result.get_jlong();
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214
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215 if (entry == NULL) {
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216 // findNative didn't find it, if there are any agent libraries look in them
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217 AgentLibrary* agent;
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218 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) {
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219 entry = (address) os::dll_lookup(agent->os_lib(), jni_name);
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220 if (entry != NULL) {
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221 return entry;
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222 }
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223 }
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224 }
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225
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226 return entry;
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227 }
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228
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229
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230 address NativeLookup::lookup_critical_style(methodHandle method, char* pure_name, const char* long_name, int args_size, bool os_style) {
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231 if (!method->has_native_function()) {
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232 return NULL;
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233 }
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234
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235 address current_entry = method->native_function();
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236
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237 char dll_name[JVM_MAXPATHLEN];
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238 int offset;
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239 if (os::dll_address_to_library_name(current_entry, dll_name, sizeof(dll_name), &offset)) {
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240 char ebuf[32];
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241 void* dll = os::dll_load(dll_name, ebuf, sizeof(ebuf));
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242 if (dll != NULL) {
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243 // Compute complete JNI name for style
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244 stringStream st;
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245 if (os_style) os::print_jni_name_prefix_on(&st, args_size);
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246 st.print_raw(pure_name);
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247 st.print_raw(long_name);
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248 if (os_style) os::print_jni_name_suffix_on(&st, args_size);
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249 char* jni_name = st.as_string();
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250 return (address)os::dll_lookup(dll, jni_name);
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251 }
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252 }
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253
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254 return NULL;
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255 }
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256
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257
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258 // Check all the formats of native implementation name to see if there is one
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259 // for the specified method.
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260 address NativeLookup::lookup_entry(methodHandle method, bool& in_base_library, TRAPS) {
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261 address entry = NULL;
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262 in_base_library = false;
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263 // Compute pure name
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264 char* pure_name = pure_jni_name(method);
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265
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266 // Compute argument size
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267 int args_size = 1 // JNIEnv
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268 + (method->is_static() ? 1 : 0) // class for static methods
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269 + method->size_of_parameters(); // actual parameters
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270
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271
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272 // 1) Try JNI short style
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273 entry = lookup_style(method, pure_name, "", args_size, true, in_base_library, CHECK_NULL);
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274 if (entry != NULL) return entry;
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275
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276 // Compute long name
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277 char* long_name = long_jni_name(method);
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278
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279 // 2) Try JNI long style
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280 entry = lookup_style(method, pure_name, long_name, args_size, true, 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 // 3) Try JNI short style without os prefix/suffix
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284 entry = lookup_style(method, pure_name, "", args_size, false, in_base_library, CHECK_NULL);
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285 if (entry != NULL) return entry;
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286
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287 // 4) Try JNI long style without os prefix/suffix
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288 entry = lookup_style(method, pure_name, long_name, args_size, false, in_base_library, CHECK_NULL);
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289
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290 return entry; // NULL indicates not found
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291 }
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292
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293 // Check all the formats of native implementation name to see if there is one
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294 // for the specified method.
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295 address NativeLookup::lookup_critical_entry(methodHandle method) {
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296 if (!CriticalJNINatives) return NULL;
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297
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298 if (method->is_synchronized() ||
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299 !method->is_static()) {
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300 // Only static non-synchronized methods are allowed
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301 return NULL;
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302 }
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303
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304 ResourceMark rm;
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305 address entry = NULL;
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306
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307 Symbol* signature = method->signature();
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308 for (int end = 0; end < signature->utf8_length(); end++) {
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309 if (signature->byte_at(end) == 'L') {
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310 // Don't allow object types
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311 return NULL;
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312 }
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313 }
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314
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315 // Compute critical name
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316 char* critical_name = critical_jni_name(method);
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317
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318 // Compute argument size
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319 int args_size = 1 // JNIEnv
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320 + (method->is_static() ? 1 : 0) // class for static methods
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321 + method->size_of_parameters(); // actual parameters
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322
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323
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324 // 1) Try JNI short style
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325 entry = lookup_critical_style(method, critical_name, "", args_size, true);
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326 if (entry != NULL) return entry;
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327
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328 // Compute long name
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329 char* long_name = long_jni_name(method);
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330
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331 // 2) Try JNI long style
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332 entry = lookup_critical_style(method, critical_name, long_name, args_size, true);
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333 if (entry != NULL) return entry;
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334
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335 // 3) Try JNI short style without os prefix/suffix
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336 entry = lookup_critical_style(method, critical_name, "", args_size, false);
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337 if (entry != NULL) return entry;
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338
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339 // 4) Try JNI long style without os prefix/suffix
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340 entry = lookup_critical_style(method, critical_name, long_name, args_size, false);
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341
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342 return entry; // NULL indicates not found
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343 }
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344
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345 // Check if there are any JVM TI prefixes which have been applied to the native method name.
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346 // If any are found, remove them before attemping the look up of the
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347 // native implementation again.
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348 // See SetNativeMethodPrefix in the JVM TI Spec for more details.
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349 address NativeLookup::lookup_entry_prefixed(methodHandle method, bool& in_base_library, TRAPS) {
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350 #if INCLUDE_JVMTI
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351 ResourceMark rm(THREAD);
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352
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353 int prefix_count;
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354 char** prefixes = JvmtiExport::get_all_native_method_prefixes(&prefix_count);
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355 char* in_name = method->name()->as_C_string();
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356 char* wrapper_name = in_name;
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357 // last applied prefix will be first -- go backwards
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358 for (int i = prefix_count-1; i >= 0; i--) {
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359 char* prefix = prefixes[i];
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360 size_t prefix_len = strlen(prefix);
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361 if (strncmp(prefix, wrapper_name, prefix_len) == 0) {
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362 // has this prefix remove it
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363 wrapper_name += prefix_len;
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364 }
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365 }
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366 if (wrapper_name != in_name) {
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367 // we have a name for a wrapping method
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368 int wrapper_name_len = (int)strlen(wrapper_name);
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369 TempNewSymbol wrapper_symbol = SymbolTable::probe(wrapper_name, wrapper_name_len);
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370 if (wrapper_symbol != NULL) {
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371 KlassHandle kh(method->method_holder());
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372 Method* wrapper_method = kh()->lookup_method(wrapper_symbol,
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373 method->signature());
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374 if (wrapper_method != NULL && !wrapper_method->is_native()) {
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375 // we found a wrapper method, use its native entry
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376 method->set_is_prefixed_native();
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377 return lookup_entry(wrapper_method, in_base_library, THREAD);
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378 }
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379 }
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380 }
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381 #endif // INCLUDE_JVMTI
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382 return NULL;
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383 }
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384
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385 address NativeLookup::lookup_base(methodHandle method, bool& in_base_library, TRAPS) {
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386 address entry = NULL;
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387 ResourceMark rm(THREAD);
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388
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389 entry = lookup_entry(method, in_base_library, THREAD);
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390 if (entry != NULL) return entry;
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391
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392 // standard native method resolution has failed. Check if there are any
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393 // JVM TI prefixes which have been applied to the native method name.
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394 entry = lookup_entry_prefixed(method, in_base_library, THREAD);
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395 if (entry != NULL) return entry;
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396
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397 // Native function not found, throw UnsatisfiedLinkError
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398 THROW_MSG_0(vmSymbols::java_lang_UnsatisfiedLinkError(),
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399 method->name_and_sig_as_C_string());
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400 }
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401
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402
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403 address NativeLookup::lookup(methodHandle method, bool& in_base_library, TRAPS) {
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404 if (!method->has_native_function()) {
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405 address entry = lookup_base(method, in_base_library, CHECK_NULL);
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406 method->set_native_function(entry,
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407 Method::native_bind_event_is_interesting);
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408 // -verbose:jni printing
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409 if (PrintJNIResolving) {
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410 ResourceMark rm(THREAD);
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411 tty->print_cr("[Dynamic-linking native method %s.%s ... JNI]",
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412 method->method_holder()->external_name(),
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413 method->name()->as_C_string());
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414 }
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415 }
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416 return method->native_function();
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417 }
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418
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419 address NativeLookup::base_library_lookup(const char* class_name, const char* method_name, const char* signature) {
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420 EXCEPTION_MARK;
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421 bool in_base_library = true; // SharedRuntime inits some math methods.
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422 TempNewSymbol c_name = SymbolTable::new_symbol(class_name, CATCH);
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423 TempNewSymbol m_name = SymbolTable::new_symbol(method_name, CATCH);
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424 TempNewSymbol s_name = SymbolTable::new_symbol(signature, CATCH);
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425
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426 // Find the class
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427 Klass* k = SystemDictionary::resolve_or_fail(c_name, true, CATCH);
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428 instanceKlassHandle klass (THREAD, k);
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429
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430 // Find method and invoke standard lookup
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431 methodHandle method (THREAD,
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432 klass->uncached_lookup_method(m_name, s_name, Klass::normal));
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433 address result = lookup(method, in_base_library, CATCH);
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434 assert(in_base_library, "must be in basic library");
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435 guarantee(result != NULL, "must be non NULL");
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436 return result;
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437 }