Wed, 05 Jun 2024 19:50:44 +0200
add extra nullptr check in the event loop to handle the case when the finish ptr is set to NULL after it was already scheduled
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2013 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <stdio.h> |
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30 | #include <stdlib.h> |
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31 | #include <dlfcn.h> |
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32 | |
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33 | #include <cx/map.h> |
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34 | |
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35 | #include "jvm.h" |
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36 | #include "daemon/request.h" |
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37 | |
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38 | #ifdef __i386 |
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39 | #define LIBJVM "/usr/java/jre/lib/i386/server/libjvm.so" |
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40 | #else |
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41 | |
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42 | #endif |
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43 | |
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44 | static JNIEnv *env = NULL; |
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45 | static JavaVM *jvm = NULL; |
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46 | |
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47 | static jobject plugin_instance = NULL; |
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48 | static jmethodID load_jmodules_method = NULL; |
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49 | static jmethodID exec_method = NULL; |
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50 | |
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51 | int jvm_init(pblock *pb, Session *sn, Request *rq) { |
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52 | // load lib |
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53 | void *lib = dlopen(LIBJVM, RTLD_GLOBAL | RTLD_NOW); |
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54 | if(!lib) { |
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55 | log_ereport(LOG_FAILURE, "Cannot load libjvm.so"); |
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56 | return REQ_ABORTED; |
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57 | } |
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58 | |
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59 | // get symbol |
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60 | void *sym = dlsym(lib, "JNI_CreateJavaVM"); |
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61 | if(sym == NULL) { |
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62 | log_ereport( |
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63 | LOG_FAILURE, |
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64 | "Cannot get symbol JNI_CreateJavaVM from lib"); |
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65 | return REQ_ABORTED; |
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66 | } |
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67 | |
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68 | // create JVM |
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69 | JavaVMInitArgs vm_args; |
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70 | JavaVMOption options[2]; |
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71 | options[0].optionString = "-Djava.class.path=lib/wsrt.jar"; |
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72 | options[1].optionString = "-Djava.library.path=lib/"; |
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73 | vm_args.version = JNI_VERSION_1_6; |
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74 | vm_args.options = options; |
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75 | vm_args.nOptions = 2; |
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76 | vm_args.ignoreUnrecognized = JNI_TRUE; |
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77 | |
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78 | CreateJVMFunc create_jvm = (CreateJVMFunc)sym; |
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79 | if(create_jvm(&jvm, (void**)&env, &vm_args)) { |
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80 | dlclose(lib); |
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81 | log_ereport(LOG_FAILURE, "Cannot create JVM"); |
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82 | } |
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83 | |
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84 | // load classes and methods |
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85 | jclass cls = (*env)->FindClass(env, "webserver/ServerPlugin"); |
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86 | if(!cls) { |
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87 | log_ereport( |
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88 | LOG_FAILURE, |
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89 | "jvm-init: missing or broken wsrt.jar"); |
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90 | log_ereport( |
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91 | LOG_FAILURE, |
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92 | "jvm-init: missing class webserver.ServerPlugin"); |
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93 | return REQ_ABORTED; |
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94 | } |
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95 | |
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96 | jmethodID constr = (*env)->GetMethodID(env, cls, "<init>", "()V"); |
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97 | if(!constr) { |
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98 | log_ereport( |
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99 | LOG_FAILURE, |
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100 | "jvm-init: missing or broken wsrt.jar"); |
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101 | log_ereport( |
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102 | LOG_FAILURE, |
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103 | "jvm-init: missing constructor"); |
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104 | return REQ_ABORTED; |
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105 | } |
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106 | plugin_instance = (*env)->NewObject(env, cls, constr); |
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107 | if(!plugin_instance) { |
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108 | log_ereport( |
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109 | LOG_FAILURE, |
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110 | "jvm-init: cannot create ServerPlugin instance"); |
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111 | return REQ_ABORTED; |
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112 | } |
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113 | |
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114 | // methods |
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115 | load_jmodules_method = (*env)->GetMethodID( |
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116 | env, |
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117 | cls, |
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118 | "loadModule", |
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119 | "(Ljava/lang/String;Ljava/lang/String;)I"); |
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120 | if(!load_jmodules_method) { |
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121 | log_ereport(LOG_FAILURE, "jvm-init: missing or broken wsrt.jar"); |
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122 | log_ereport(LOG_FAILURE, "jvm-init: missing method (loadModule)"); |
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123 | return REQ_ABORTED; |
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124 | } |
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125 | |
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126 | exec_method = (*env)->GetMethodID( |
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127 | env, |
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128 | cls, |
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129 | "exec", |
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130 | "(I)I"); |
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131 | if(!exec_method) { |
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132 | log_ereport(LOG_FAILURE, "jvm-init: missing or broken wsrt.jar"); |
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133 | log_ereport(LOG_FAILURE, "jvm-init: missing method (exec)"); |
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134 | return REQ_ABORTED; |
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135 | } |
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136 | |
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137 | |
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138 | return REQ_PROCEED; |
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139 | } |
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140 | |
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141 | int load_jmodules(pblock *pb, Session *sn, Request *rq) { |
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142 | char *jar = pblock_findval("jar", pb); |
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143 | char *classes = pblock_findval("classes", pb); |
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144 | |
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145 | if(!jar || !classes) { |
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146 | log_ereport( |
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147 | LOG_MISCONFIG, |
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148 | "load-jmodule: missing parameters (jar, classes)"); |
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149 | return REQ_ABORTED; |
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150 | } |
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151 | |
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152 | // check jvm |
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153 | if(!plugin_instance) { |
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154 | log_ereport( |
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155 | LOG_FAILURE, |
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156 | "load-jmodules: java plugin not properly loaded"); |
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157 | return REQ_ABORTED; |
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158 | } |
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159 | if(!load_jmodules_method) { |
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160 | log_ereport( |
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161 | LOG_FAILURE, |
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162 | "load-jmodules: java plugin not properly loaded"); |
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163 | return REQ_ABORTED; |
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164 | } |
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165 | |
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166 | // load java module |
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167 | jstring jar_param = (*env)->NewStringUTF(env, jar); |
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168 | jstring classes_param = (*env)->NewStringUTF(env, classes); |
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169 | |
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170 | jint ret = (*env)->CallIntMethod( |
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171 | env, |
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172 | plugin_instance, |
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173 | load_jmodules_method, |
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174 | jar_param, |
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175 | classes_param); |
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176 | |
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177 | // free stuff |
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178 | (*env)->DeleteLocalRef(env, jar_param); |
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179 | (*env)->DeleteLocalRef(env, classes_param); |
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180 | |
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181 | return ret; |
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182 | } |
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183 | |
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184 | int jexec(pblock *pb, Session *sn, Request *rq) { |
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185 | return REQ_NOACTION; |
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186 | } |
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187 | |
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188 | int jvm_method_exec(FuncStruct *func, pblock *pb, Session *sn, Request *rq) { |
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189 | printf("jvm_method_exec: %d\n", func); |
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190 | NSAPIRequest *nrq = (NSAPIRequest*)rq; |
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191 | |
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192 | JNIEnv *e = NULL; |
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193 | int r = (*jvm)->AttachCurrentThread(jvm, (void**)&e, NULL); |
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194 | |
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195 | jint index = (jint)func->exec_data; |
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196 | printf("(C) exec: %d\n", index); |
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197 | |
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198 | jint ret = (*env)->CallIntMethod( |
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199 | env, |
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200 | plugin_instance, |
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201 | exec_method, |
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202 | index); |
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203 | |
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204 | return ret; |
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205 | } |
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206 |