1 /* |
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2 * Copyright (c) 2003, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 #include <sys/types.h> |
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26 |
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27 #include <stdio.h> |
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28 #include <string.h> |
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29 #include <stdlib.h> |
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30 #include <stdarg.h> |
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31 |
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32 |
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33 #include <limits.h> |
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34 |
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35 #include <com_sun_java_util_jar_pack_NativeUnpack.h> |
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36 |
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37 #include "jni_util.h" |
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38 |
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39 #include "defines.h" |
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40 #include "bytes.h" |
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41 #include "utils.h" |
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42 #include "coding.h" |
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43 #include "bands.h" |
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44 #include "constants.h" |
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45 #include "zip.h" |
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46 #include "unpack.h" |
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47 |
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48 |
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49 static jfieldID unpackerPtrFID; |
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50 static jmethodID currentInstMID; |
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51 static jmethodID readInputMID; |
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52 static jclass NIclazz; |
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53 static jmethodID getUnpackerPtrMID; |
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54 |
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55 static char* dbg = null; |
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56 |
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57 #define THROW_IOE(x) JNU_ThrowIOException(env,x) |
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58 |
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59 #define CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(CERVTI_exception, CERVTI_message) \ |
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60 do { \ |
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61 if ((env)->ExceptionOccurred()) { \ |
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62 THROW_IOE(CERVTI_message); \ |
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63 return; \ |
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64 } \ |
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65 if ((CERVTI_exception) == NULL) { \ |
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66 THROW_IOE(CERVTI_message); \ |
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67 return; \ |
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68 } \ |
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69 } while (JNI_FALSE) |
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70 |
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71 |
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72 #define CHECK_EXCEPTION_RETURN_VALUE(CERL_exception, CERL_return_value) \ |
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73 do { \ |
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74 if ((env)->ExceptionOccurred()) { \ |
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75 return CERL_return_value; \ |
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76 } \ |
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77 if ((CERL_exception) == NULL) { \ |
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78 return CERL_return_value; \ |
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79 } \ |
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80 } while (JNI_FALSE) |
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81 |
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82 |
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83 // If these useful macros aren't defined in jni_util.h then define them here |
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84 #ifndef CHECK_NULL_RETURN |
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85 #define CHECK_NULL_RETURN(x, y) \ |
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86 do { \ |
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87 if ((x) == NULL) return (y); \ |
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88 } while (JNI_FALSE) |
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89 #endif |
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90 |
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91 #ifndef CHECK_EXCEPTION_RETURN |
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92 #define CHECK_EXCEPTION_RETURN(env, y) \ |
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93 do { \ |
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94 if ((*env)->ExceptionCheck(env)) return (y); \ |
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95 } while (JNI_FALSE) |
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96 #endif |
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97 |
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98 static jlong read_input_via_jni(unpacker* self, |
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99 void* buf, jlong minlen, jlong maxlen); |
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100 |
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101 static unpacker* get_unpacker(JNIEnv *env, jobject pObj, bool noCreate=false) { |
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102 unpacker* uPtr; |
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103 jlong p = env->CallLongMethod(pObj, getUnpackerPtrMID); |
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104 uPtr = (unpacker*)jlong2ptr(p); |
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105 if (uPtr == null) { |
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106 if (noCreate) return null; |
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107 uPtr = new unpacker(); |
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108 if (uPtr == null) { |
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109 THROW_IOE(ERROR_ENOMEM); |
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110 return null; |
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111 } |
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112 //fprintf(stderr, "get_unpacker(%p) uPtr=%p initializing\n", pObj, uPtr); |
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113 uPtr->init(read_input_via_jni); |
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114 uPtr->jniobj = (void*) env->NewGlobalRef(pObj); |
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115 env->SetLongField(pObj, unpackerPtrFID, ptr2jlong(uPtr)); |
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116 } |
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117 uPtr->jnienv = env; // keep refreshing this in case of MT access |
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118 return uPtr; |
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119 } |
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120 |
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121 // This is the harder trick: Pull the current state out of mid-air. |
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122 static unpacker* get_unpacker() { |
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123 //fprintf(stderr, "get_unpacker()\n"); |
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124 JavaVM* vm = null; |
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125 jsize nVM = 0; |
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126 jint retval = JNI_GetCreatedJavaVMs(&vm, 1, &nVM); |
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127 // other VM implements may differ, thus for correctness, we need these checks |
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128 if (retval != JNI_OK || nVM != 1) |
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129 return null; |
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130 void* envRaw = null; |
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131 vm->GetEnv(&envRaw, JNI_VERSION_1_1); |
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132 JNIEnv* env = (JNIEnv*) envRaw; |
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133 //fprintf(stderr, "get_unpacker() env=%p\n", env); |
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134 CHECK_NULL_RETURN(env, NULL); |
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135 jobject pObj = env->CallStaticObjectMethod(NIclazz, currentInstMID); |
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136 // We should check upon the known non-null variable because here we want to check |
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137 // only for pending exceptions. If pObj is null we'll deal with it later. |
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138 CHECK_EXCEPTION_RETURN_VALUE(env, NULL); |
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139 //fprintf(stderr, "get_unpacker0() pObj=%p\n", pObj); |
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140 if (pObj != null) { |
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141 // Got pObj and env; now do it the easy way. |
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142 return get_unpacker(env, pObj); |
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143 } |
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144 // this should really not happen, if it does something is seriously |
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145 // wrong throw an exception |
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146 THROW_IOE(ERROR_INTERNAL); |
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147 return null; |
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148 } |
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149 |
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150 static void free_unpacker(JNIEnv *env, jobject pObj, unpacker* uPtr) { |
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151 if (uPtr != null) { |
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152 //fprintf(stderr, "free_unpacker(%p) uPtr=%p\n", pObj, uPtr); |
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153 env->DeleteGlobalRef((jobject) uPtr->jniobj); |
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154 uPtr->jniobj = null; |
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155 uPtr->free(); |
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156 delete uPtr; |
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157 env->SetLongField(pObj, unpackerPtrFID, (jlong)null); |
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158 } |
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159 } |
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160 |
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161 unpacker* unpacker::current() { |
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162 return get_unpacker(); |
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163 } |
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164 |
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165 // Callback for fetching data, Java style. Calls NativeUnpack.readInputFn(). |
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166 static jlong read_input_via_jni(unpacker* self, |
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167 void* buf, jlong minlen, jlong maxlen) { |
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168 JNIEnv* env = (JNIEnv*) self->jnienv; |
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169 jobject pbuf = env->NewDirectByteBuffer(buf, maxlen); |
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170 return env->CallLongMethod((jobject) self->jniobj, readInputMID, |
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171 pbuf, minlen); |
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172 } |
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173 |
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174 JNIEXPORT void JNICALL |
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175 Java_com_sun_java_util_jar_pack_NativeUnpack_initIDs(JNIEnv *env, jclass clazz) { |
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176 #ifndef PRODUCT |
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177 dbg = getenv("DEBUG_ATTACH"); |
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178 while( dbg != null) { sleep(10); } |
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179 #endif |
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180 NIclazz = (jclass) env->NewGlobalRef(clazz); |
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181 |
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182 unpackerPtrFID = env->GetFieldID(clazz, "unpackerPtr", "J"); |
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183 CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(unpackerPtrFID, ERROR_INIT); |
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184 |
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185 currentInstMID = env->GetStaticMethodID(clazz, "currentInstance", |
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186 "()Ljava/lang/Object;"); |
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187 CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(currentInstMID, ERROR_INIT); |
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188 |
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189 readInputMID = env->GetMethodID(clazz, "readInputFn", |
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190 "(Ljava/nio/ByteBuffer;J)J"); |
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191 CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(readInputMID, ERROR_INIT); |
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192 |
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193 getUnpackerPtrMID = env->GetMethodID(clazz, "getUnpackerPtr", "()J"); |
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194 CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(getUnpackerPtrMID, ERROR_INIT); |
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195 } |
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196 |
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197 JNIEXPORT jlong JNICALL |
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198 Java_com_sun_java_util_jar_pack_NativeUnpack_start(JNIEnv *env, jobject pObj, |
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199 jobject pBuf, jlong offset) { |
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200 // try to get the unpacker pointer the hard way first, we do this to ensure |
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201 // valid object pointers and env is intact, if not now is good time to bail. |
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202 unpacker* uPtr = get_unpacker(); |
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203 //fprintf(stderr, "start(%p) uPtr=%p initializing\n", pObj, uPtr); |
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204 CHECK_EXCEPTION_RETURN_VALUE(uPtr, -1); |
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205 // redirect our io to the default log file or whatever. |
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206 uPtr->redirect_stdio(); |
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207 |
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208 void* buf = null; |
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209 size_t buflen = 0; |
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210 if (pBuf != null) { |
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211 buf = env->GetDirectBufferAddress(pBuf); |
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212 buflen = (size_t)env->GetDirectBufferCapacity(pBuf); |
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213 if (buflen == 0) buf = null; |
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214 if (buf == null) { THROW_IOE(ERROR_INTERNAL); return 0; } |
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215 if ((size_t)offset >= buflen) |
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216 { buf = null; buflen = 0; } |
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217 else |
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218 { buf = (char*)buf + (size_t)offset; buflen -= (size_t)offset; } |
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219 } |
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220 // before we start off we make sure there is no other error by the time we |
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221 // get here |
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222 if (uPtr->aborting()) { |
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223 THROW_IOE(uPtr->get_abort_message()); |
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224 return 0; |
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225 } |
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226 uPtr->start(buf, buflen); |
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227 if (uPtr->aborting()) { |
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228 THROW_IOE(uPtr->get_abort_message()); |
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229 return 0; |
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230 } |
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231 |
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232 return ((jlong) |
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233 uPtr->get_segments_remaining() << 32) |
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234 + uPtr->get_files_remaining(); |
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235 } |
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236 |
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237 JNIEXPORT jboolean JNICALL |
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238 Java_com_sun_java_util_jar_pack_NativeUnpack_getNextFile(JNIEnv *env, jobject pObj, |
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239 jobjectArray pParts) { |
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240 |
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241 unpacker* uPtr = get_unpacker(env, pObj); |
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242 CHECK_EXCEPTION_RETURN_VALUE(uPtr, false); |
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243 unpacker::file* filep = uPtr->get_next_file(); |
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244 |
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245 if (uPtr->aborting()) { |
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246 THROW_IOE(uPtr->get_abort_message()); |
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247 return false; |
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248 } |
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249 |
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250 CHECK_NULL_RETURN(filep, false); |
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251 assert(filep == &uPtr->cur_file); |
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252 |
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253 int pidx = 0, iidx = 0; |
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254 jintArray pIntParts = (jintArray) env->GetObjectArrayElement(pParts, pidx++); |
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255 CHECK_EXCEPTION_RETURN_VALUE(pIntParts, false); |
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256 jint* intParts = env->GetIntArrayElements(pIntParts, null); |
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257 intParts[iidx++] = (jint)( (julong)filep->size >> 32 ); |
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258 intParts[iidx++] = (jint)( (julong)filep->size >> 0 ); |
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259 intParts[iidx++] = filep->modtime; |
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260 intParts[iidx++] = filep->deflate_hint() ? 1 : 0; |
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261 env->ReleaseIntArrayElements(pIntParts, intParts, JNI_COMMIT); |
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262 jstring filename = env->NewStringUTF(filep->name); |
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263 CHECK_EXCEPTION_RETURN_VALUE(filename, false); |
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264 env->SetObjectArrayElement(pParts, pidx++, filename); |
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265 CHECK_EXCEPTION_RETURN_VALUE(uPtr, false); |
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266 jobject pDataBuf = null; |
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267 if (filep->data[0].len > 0) { |
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268 pDataBuf = env->NewDirectByteBuffer(filep->data[0].ptr, |
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269 filep->data[0].len); |
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270 CHECK_EXCEPTION_RETURN_VALUE(pDataBuf, false); |
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271 } |
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272 env->SetObjectArrayElement(pParts, pidx++, pDataBuf); |
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273 CHECK_EXCEPTION_RETURN_VALUE(uPtr, false); |
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274 pDataBuf = null; |
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275 if (filep->data[1].len > 0) { |
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276 pDataBuf = env->NewDirectByteBuffer(filep->data[1].ptr, |
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277 filep->data[1].len); |
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278 CHECK_EXCEPTION_RETURN_VALUE(pDataBuf, false); |
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279 } |
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280 env->SetObjectArrayElement(pParts, pidx++, pDataBuf); |
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281 CHECK_EXCEPTION_RETURN_VALUE(uPtr, false); |
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282 |
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283 return true; |
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284 } |
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285 |
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286 |
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287 JNIEXPORT jobject JNICALL |
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288 Java_com_sun_java_util_jar_pack_NativeUnpack_getUnusedInput(JNIEnv *env, jobject pObj) { |
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289 unpacker* uPtr = get_unpacker(env, pObj); |
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290 CHECK_EXCEPTION_RETURN_VALUE(uPtr, NULL); |
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291 unpacker::file* filep = &uPtr->cur_file; |
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292 |
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293 if (uPtr->aborting()) { |
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294 THROW_IOE(uPtr->get_abort_message()); |
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295 return false; |
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296 } |
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297 |
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298 // We have fetched all the files. |
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299 // Now swallow up any remaining input. |
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300 if (uPtr->input_remaining() == 0) { |
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301 return null; |
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302 } else { |
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303 bytes remaining_bytes; |
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304 remaining_bytes.malloc(uPtr->input_remaining()); |
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305 remaining_bytes.copyFrom(uPtr->input_scan(), uPtr->input_remaining()); |
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306 return env->NewDirectByteBuffer(remaining_bytes.ptr, remaining_bytes.len); |
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307 } |
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308 } |
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309 |
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310 JNIEXPORT jlong JNICALL |
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311 Java_com_sun_java_util_jar_pack_NativeUnpack_finish(JNIEnv *env, jobject pObj) { |
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312 unpacker* uPtr = get_unpacker(env, pObj, false); |
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313 CHECK_EXCEPTION_RETURN_VALUE(uPtr, NULL); |
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314 size_t consumed = uPtr->input_consumed(); |
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315 free_unpacker(env, pObj, uPtr); |
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316 return consumed; |
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317 } |
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318 |
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319 JNIEXPORT jboolean JNICALL |
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320 Java_com_sun_java_util_jar_pack_NativeUnpack_setOption(JNIEnv *env, jobject pObj, |
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321 jstring pProp, jstring pValue) { |
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322 unpacker* uPtr = get_unpacker(env, pObj); |
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323 const char* prop = env->GetStringUTFChars(pProp, JNI_FALSE); |
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324 CHECK_EXCEPTION_RETURN_VALUE(prop, false); |
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325 const char* value = env->GetStringUTFChars(pValue, JNI_FALSE); |
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326 CHECK_EXCEPTION_RETURN_VALUE(value, false); |
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327 jboolean retval = uPtr->set_option(prop, value); |
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328 env->ReleaseStringUTFChars(pProp, prop); |
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329 env->ReleaseStringUTFChars(pValue, value); |
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330 return retval; |
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331 } |
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332 |
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333 JNIEXPORT jstring JNICALL |
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334 Java_com_sun_java_util_jar_pack_NativeUnpack_getOption(JNIEnv *env, jobject pObj, |
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335 jstring pProp) { |
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336 |
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337 unpacker* uPtr = get_unpacker(env, pObj); |
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338 CHECK_EXCEPTION_RETURN_VALUE(uPtr, NULL); |
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339 const char* prop = env->GetStringUTFChars(pProp, JNI_FALSE); |
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340 CHECK_EXCEPTION_RETURN_VALUE(prop, NULL); |
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341 const char* value = uPtr->get_option(prop); |
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342 CHECK_EXCEPTION_RETURN_VALUE(value, NULL); |
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343 env->ReleaseStringUTFChars(pProp, prop); |
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344 return env->NewStringUTF(value); |
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345 } |
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