1 /*

     2  * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 #include <sys/types.h>

    26 

    27 #include <stdio.h>

    28 #include <string.h>

    29 #include <stdlib.h>

    30 #include <stdarg.h>

    31 

    32 

    33 #include <limits.h>

    34 

    35 #include <com_sun_java_util_jar_pack_NativeUnpack.h>

    36 

    37 #include "jni_util.h"

    38 

    39 #include "defines.h"

    40 #include "bytes.h"

    41 #include "utils.h"

    42 #include "coding.h"

    43 #include "bands.h"

    44 #include "constants.h"

    45 #include "zip.h"

    46 #include "unpack.h"

    47 

    48 

    49 static jfieldID  unpackerPtrFID;

    50 static jmethodID currentInstMID;

    51 static jmethodID readInputMID;

    52 static jclass    NIclazz;

    53 static jmethodID getUnpackerPtrMID;

    54 

    55 static char* dbg = null;

    56 

    57 #define THROW_IOE(x) JNU_ThrowIOException(env,x)

    58 

    59 #define CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(CERVTI_exception, CERVTI_message) \

    60     do { \

    61         if ((env)->ExceptionOccurred()) { \

    62             THROW_IOE(CERVTI_message); \

    63             return; \

    64         } \

    65         if ((CERVTI_exception) == NULL) { \

    66                 THROW_IOE(CERVTI_message); \

    67                 return; \

    68         } \

    69     } while (JNI_FALSE)

    70 

    71 

    72 #define CHECK_EXCEPTION_RETURN_VALUE(CERL_exception, CERL_return_value) \

    73     do { \

    74         if ((env)->ExceptionOccurred()) { \

    75             return CERL_return_value; \

    76         } \

    77         if ((CERL_exception) == NULL) { \

    78             return CERL_return_value; \

    79         } \

    80     } while (JNI_FALSE)

    81 

    82 

    83 // If these useful macros aren't defined in jni_util.h then define them here

    84 #ifndef CHECK_NULL_RETURN

    85 #define CHECK_NULL_RETURN(x, y) \

    86     do { \

    87         if ((x) == NULL) return (y); \

    88     } while (JNI_FALSE)

    89 #endif

    90 

    91 #ifndef CHECK_EXCEPTION_RETURN

    92 #define CHECK_EXCEPTION_RETURN(env, y) \

    93     do { \

    94         if ((*env)->ExceptionCheck(env)) return (y); \

    95     } while (JNI_FALSE)

    96 #endif

    97 

    98 /*

    99  * Declare library specific JNI_Onload entry if static build

   100  */

   101 DEF_STATIC_JNI_OnLoad

   102 

   103 static jlong read_input_via_jni(unpacker* self,

   104                                 void* buf, jlong minlen, jlong maxlen);

   105 

   106 static unpacker* get_unpacker(JNIEnv *env, jobject pObj, bool noCreate=false) {

   107   unpacker* uPtr;

   108   jlong p = env->CallLongMethod(pObj, getUnpackerPtrMID);

   109   uPtr = (unpacker*)jlong2ptr(p);

   110   if (uPtr == null) {

   111     if (noCreate)  return null;

   112     uPtr = new unpacker();

   113     if (uPtr == null) {

   114       THROW_IOE(ERROR_ENOMEM);

   115       return null;

   116     }

   117     //fprintf(stderr, "get_unpacker(%p) uPtr=%p initializing\n", pObj, uPtr);

   118     uPtr->init(read_input_via_jni);

   119     uPtr->jniobj = (void*) env->NewGlobalRef(pObj);

   120     env->SetLongField(pObj, unpackerPtrFID, ptr2jlong(uPtr));

   121   }

   122   uPtr->jnienv = env;  // keep refreshing this in case of MT access

   123   return uPtr;

   124 }

   125 

   126 // This is the harder trick:  Pull the current state out of mid-air.

   127 static unpacker* get_unpacker() {

   128   //fprintf(stderr, "get_unpacker()\n");

   129   JavaVM* vm = null;

   130   jsize nVM = 0;

   131   jint retval = JNI_GetCreatedJavaVMs(&vm, 1, &nVM);

   132   // other VM implements may differ, thus for correctness, we need these checks

   133   if (retval != JNI_OK || nVM != 1)

   134     return null;

   135   void* envRaw = null;

   136   vm->GetEnv(&envRaw, JNI_VERSION_1_1);

   137   JNIEnv* env = (JNIEnv*) envRaw;

   138   //fprintf(stderr, "get_unpacker() env=%p\n", env);

   139   CHECK_NULL_RETURN(env, NULL);

   140   jobject pObj = env->CallStaticObjectMethod(NIclazz, currentInstMID);

   141   // We should check upon the known non-null variable because here we want to check

   142   // only for pending exceptions. If pObj is null we'll deal with it later.

   143   CHECK_EXCEPTION_RETURN_VALUE(env, NULL);

   144   //fprintf(stderr, "get_unpacker0() pObj=%p\n", pObj);

   145   if (pObj != null) {

   146     // Got pObj and env; now do it the easy way.

   147     return get_unpacker(env, pObj);

   148   }

   149   // this should really not happen, if it does something is seriously

   150   // wrong throw an exception

   151   THROW_IOE(ERROR_INTERNAL);

   152   return null;

   153 }

   154 

   155 static void free_unpacker(JNIEnv *env, jobject pObj, unpacker* uPtr) {

   156   if (uPtr != null) {

   157     //fprintf(stderr, "free_unpacker(%p) uPtr=%p\n", pObj, uPtr);

   158     env->DeleteGlobalRef((jobject) uPtr->jniobj);

   159     uPtr->jniobj = null;

   160     uPtr->free();

   161     delete uPtr;

   162     env->SetLongField(pObj, unpackerPtrFID, (jlong)null);

   163    }

   164 }

   165 

   166 unpacker* unpacker::current() {

   167   return get_unpacker();

   168 }

   169 

   170 // Callback for fetching data, Java style.  Calls NativeUnpack.readInputFn().

   171 static jlong read_input_via_jni(unpacker* self,

   172                                 void* buf, jlong minlen, jlong maxlen) {

   173   JNIEnv* env = (JNIEnv*) self->jnienv;

   174   jobject pbuf = env->NewDirectByteBuffer(buf, maxlen);

   175   return env->CallLongMethod((jobject) self->jniobj, readInputMID,

   176                              pbuf, minlen);

   177 }

   178 

   179 JNIEXPORT void JNICALL

   180 Java_com_sun_java_util_jar_pack_NativeUnpack_initIDs(JNIEnv *env, jclass clazz) {

   181 #ifndef PRODUCT

   182   dbg = getenv("DEBUG_ATTACH");

   183   while( dbg != null) { sleep(10); }

   184 #endif

   185   NIclazz = (jclass) env->NewGlobalRef(clazz);

   186 

   187   unpackerPtrFID = env->GetFieldID(clazz, "unpackerPtr", "J");

   188   CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(unpackerPtrFID, ERROR_INIT);

   189 

   190   currentInstMID = env->GetStaticMethodID(clazz, "currentInstance",

   191                                           "()Ljava/lang/Object;");

   192   CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(currentInstMID, ERROR_INIT);

   193 

   194   readInputMID = env->GetMethodID(clazz, "readInputFn",

   195                                   "(Ljava/nio/ByteBuffer;J)J");

   196   CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(readInputMID, ERROR_INIT);

   197 

   198   getUnpackerPtrMID = env->GetMethodID(clazz, "getUnpackerPtr", "()J");

   199   CHECK_EXCEPTION_RETURN_VOID_THROW_IOE(getUnpackerPtrMID, ERROR_INIT);

   200 }

   201 

   202 JNIEXPORT jlong JNICALL

   203 Java_com_sun_java_util_jar_pack_NativeUnpack_start(JNIEnv *env, jobject pObj,

   204                                    jobject pBuf, jlong offset) {

   205   // try to get the unpacker pointer the hard way first, we do this to ensure

   206   // valid object pointers and env is intact, if not now is good time to bail.

   207   unpacker* uPtr = get_unpacker();

   208   //fprintf(stderr, "start(%p) uPtr=%p initializing\n", pObj, uPtr);

   209   CHECK_EXCEPTION_RETURN_VALUE(uPtr, -1);

   210   // redirect our io to the default log file or whatever.

   211   uPtr->redirect_stdio();

   212 

   213   void*  buf    = null;

   214   size_t buflen = 0;

   215   if (pBuf != null) {

   216     buf    = env->GetDirectBufferAddress(pBuf);

   217     buflen = (size_t)env->GetDirectBufferCapacity(pBuf);

   218     if (buflen == 0)  buf = null;

   219     if (buf == null) { THROW_IOE(ERROR_INTERNAL); return 0; }

   220     if ((size_t)offset >= buflen)

   221       { buf = null; buflen = 0; }

   222     else

   223       { buf = (char*)buf + (size_t)offset; buflen -= (size_t)offset; }

   224   }

   225   // before we start off we make sure there is no other error by the time we

   226   // get here

   227   if (uPtr->aborting()) {

   228     THROW_IOE(uPtr->get_abort_message());

   229     return 0;

   230   }

   231   uPtr->start(buf, buflen);

   232   if (uPtr->aborting()) {

   233     THROW_IOE(uPtr->get_abort_message());

   234     return 0;

   235   }

   236 

   237   return ((jlong)

   238           uPtr->get_segments_remaining() << 32)

   239     + uPtr->get_files_remaining();

   240 }

   241 

   242 JNIEXPORT jboolean JNICALL

   243 Java_com_sun_java_util_jar_pack_NativeUnpack_getNextFile(JNIEnv *env, jobject pObj,

   244                                          jobjectArray pParts) {

   245 

   246   unpacker* uPtr = get_unpacker(env, pObj);

   247   CHECK_EXCEPTION_RETURN_VALUE(uPtr, false);

   248   unpacker::file* filep = uPtr->get_next_file();

   249 

   250   if (uPtr->aborting()) {

   251     THROW_IOE(uPtr->get_abort_message());

   252     return false;

   253   }

   254 

   255   CHECK_NULL_RETURN(filep, false);

   256   assert(filep == &uPtr->cur_file);

   257 

   258   int pidx = 0, iidx = 0;

   259   jintArray pIntParts = (jintArray) env->GetObjectArrayElement(pParts, pidx++);

   260   CHECK_EXCEPTION_RETURN_VALUE(pIntParts, false);

   261   jint*     intParts  = env->GetIntArrayElements(pIntParts, null);

   262   intParts[iidx++] = (jint)( (julong)filep->size >> 32 );

   263   intParts[iidx++] = (jint)( (julong)filep->size >>  0 );

   264   intParts[iidx++] = filep->modtime;

   265   intParts[iidx++] = filep->deflate_hint() ? 1 : 0;

   266   env->ReleaseIntArrayElements(pIntParts, intParts, JNI_COMMIT);

   267   jstring filename = env->NewStringUTF(filep->name);

   268   CHECK_EXCEPTION_RETURN_VALUE(filename, false);

   269   env->SetObjectArrayElement(pParts, pidx++, filename);

   270   CHECK_EXCEPTION_RETURN_VALUE(uPtr, false);

   271   jobject pDataBuf = null;

   272   if (filep->data[0].len > 0) {

   273     pDataBuf = env->NewDirectByteBuffer(filep->data[0].ptr,

   274                                         filep->data[0].len);

   275     CHECK_EXCEPTION_RETURN_VALUE(pDataBuf, false);

   276   }

   277   env->SetObjectArrayElement(pParts, pidx++, pDataBuf);

   278   CHECK_EXCEPTION_RETURN_VALUE(uPtr, false);

   279   pDataBuf = null;

   280   if (filep->data[1].len > 0) {

   281     pDataBuf = env->NewDirectByteBuffer(filep->data[1].ptr,

   282                                         filep->data[1].len);

   283     CHECK_EXCEPTION_RETURN_VALUE(pDataBuf, false);

   284   }

   285   env->SetObjectArrayElement(pParts, pidx++, pDataBuf);

   286   CHECK_EXCEPTION_RETURN_VALUE(uPtr, false);

   287 

   288   return true;

   289 }

   290 

   291 

   292 JNIEXPORT jobject JNICALL

   293 Java_com_sun_java_util_jar_pack_NativeUnpack_getUnusedInput(JNIEnv *env, jobject pObj) {

   294   unpacker* uPtr = get_unpacker(env, pObj);

   295   CHECK_EXCEPTION_RETURN_VALUE(uPtr, NULL);

   296   unpacker::file* filep = &uPtr->cur_file;

   297 

   298   if (uPtr->aborting()) {

   299     THROW_IOE(uPtr->get_abort_message());

   300     return null;

   301   }

   302 

   303   // We have fetched all the files.

   304   // Now swallow up any remaining input.

   305   if (uPtr->input_remaining() == 0) {

   306     return null;

   307   } else {

   308     bytes remaining_bytes;

   309     remaining_bytes.malloc(uPtr->input_remaining());

   310     remaining_bytes.copyFrom(uPtr->input_scan(), uPtr->input_remaining());

   311     return env->NewDirectByteBuffer(remaining_bytes.ptr, remaining_bytes.len);

   312   }

   313 }

   314 

   315 JNIEXPORT jlong JNICALL

   316 Java_com_sun_java_util_jar_pack_NativeUnpack_finish(JNIEnv *env, jobject pObj) {

   317   unpacker* uPtr = get_unpacker(env, pObj, false);

   318   CHECK_EXCEPTION_RETURN_VALUE(uPtr, 0);

   319   size_t consumed = uPtr->input_consumed();

   320   free_unpacker(env, pObj, uPtr);

   321   return consumed;

   322 }

   323 

   324 JNIEXPORT jboolean JNICALL

   325 Java_com_sun_java_util_jar_pack_NativeUnpack_setOption(JNIEnv *env, jobject pObj,

   326                                        jstring pProp, jstring pValue) {

   327   unpacker*   uPtr  = get_unpacker(env, pObj);

   328   CHECK_EXCEPTION_RETURN_VALUE(uPtr, false);

   329   const char* prop  = env->GetStringUTFChars(pProp, JNI_FALSE);

   330   CHECK_EXCEPTION_RETURN_VALUE(prop, false);

   331   const char* value = env->GetStringUTFChars(pValue, JNI_FALSE);

   332   CHECK_EXCEPTION_RETURN_VALUE(value, false);

   333   jboolean   retval = uPtr->set_option(prop, value);

   334   env->ReleaseStringUTFChars(pProp,  prop);

   335   env->ReleaseStringUTFChars(pValue, value);

   336   return retval;

   337 }

   338 

   339 JNIEXPORT jstring JNICALL

   340 Java_com_sun_java_util_jar_pack_NativeUnpack_getOption(JNIEnv *env, jobject pObj,

   341                                        jstring pProp) {

   342 

   343   unpacker*   uPtr  = get_unpacker(env, pObj);

   344   CHECK_EXCEPTION_RETURN_VALUE(uPtr, NULL);

   345   const char* prop  = env->GetStringUTFChars(pProp, JNI_FALSE);

   346   CHECK_EXCEPTION_RETURN_VALUE(prop, NULL);

   347   const char* value = uPtr->get_option(prop);

   348   CHECK_EXCEPTION_RETURN_VALUE(value, NULL);

   349   env->ReleaseStringUTFChars(pProp, prop);

   350   return env->NewStringUTF(value);

   351 }