8029020: Check src/share/native/java/util/zip code for JNI pending exceptions

Reviewed-by: alanb, chegar

src/share/native/java/util/zip/Deflater.c

 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -49,13 +49,21 @@ JNIEXPORT void JNICALL
 Java_java_util_zip_Deflater_initIDs(JNIEnv *env, jclass cls)
 {
     levelID = (*env)->GetFieldID(env, cls, "level", "I");
+    CHECK_NULL(levelID);
     strategyID = (*env)->GetFieldID(env, cls, "strategy", "I");
+    CHECK_NULL(strategyID);
     setParamsID = (*env)->GetFieldID(env, cls, "setParams", "Z");
+    CHECK_NULL(setParamsID);
     finishID = (*env)->GetFieldID(env, cls, "finish", "Z");
+    CHECK_NULL(finishID);
     finishedID = (*env)->GetFieldID(env, cls, "finished", "Z");
+    CHECK_NULL(finishedID);
     bufID = (*env)->GetFieldID(env, cls, "buf", "[B");
+    CHECK_NULL(bufID);
     offID = (*env)->GetFieldID(env, cls, "off", "I");
+    CHECK_NULL(offID);
     lenID = (*env)->GetFieldID(env, cls, "len", "I");
+    CHECK_NULL(lenID);
 }
 
 JNIEXPORT jlong JNICALL
@@ -137,14 +145,14 @@ Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr,
         in_buf = (*env)->GetPrimitiveArrayCritical(env, this_buf, 0);
         if (in_buf == NULL) {
             // Throw OOME only when length is not zero
-            if (this_len != 0)
+            if (this_len != 0 && (*env)->ExceptionOccurred(env) == NULL)
                 JNU_ThrowOutOfMemoryError(env, 0);
             return 0;
         }
         out_buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
         if (out_buf == NULL) {
             (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0);
-            if (len != 0)
+            if (len != 0 && (*env)->ExceptionOccurred(env) == NULL)
                 JNU_ThrowOutOfMemoryError(env, 0);
             return 0;
         }
@@ -163,7 +171,7 @@ Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr,
             this_off += this_len - strm->avail_in;
             (*env)->SetIntField(env, this, offID, this_off);
             (*env)->SetIntField(env, this, lenID, strm->avail_in);
-            return len - strm->avail_out;
+            return (jint) (len - strm->avail_out);
         case Z_BUF_ERROR:
             (*env)->SetBooleanField(env, this, setParamsID, JNI_FALSE);
             return 0;

src/share/native/java/util/zip/Inflater.c

 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -50,10 +50,15 @@ JNIEXPORT void JNICALL
 Java_java_util_zip_Inflater_initIDs(JNIEnv *env, jclass cls)
 {
     needDictID = (*env)->GetFieldID(env, cls, "needDict", "Z");
+    CHECK_NULL(needDictID);
     finishedID = (*env)->GetFieldID(env, cls, "finished", "Z");
+    CHECK_NULL(finishedID);
     bufID = (*env)->GetFieldID(env, cls, "buf", "[B");
+    CHECK_NULL(bufID);
     offID = (*env)->GetFieldID(env, cls, "off", "I");
+    CHECK_NULL(offID);
     lenID = (*env)->GetFieldID(env, cls, "len", "I");
+    CHECK_NULL(lenID);
 }
 
 JNIEXPORT jlong JNICALL
@@ -127,14 +132,14 @@ Java_java_util_zip_Inflater_inflateBytes(JNIEnv *env, jobject this, jlong addr,
 
     in_buf  = (*env)->GetPrimitiveArrayCritical(env, this_buf, 0);
     if (in_buf == NULL) {
-        if (this_len != 0)
+        if (this_len != 0 && (*env)->ExceptionOccurred(env) == NULL)
             JNU_ThrowOutOfMemoryError(env, 0);
         return 0;
     }
     out_buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
     if (out_buf == NULL) {
         (*env)->ReleasePrimitiveArrayCritical(env, this_buf, in_buf, 0);
-        if (len != 0)
+        if (len != 0 && (*env)->ExceptionOccurred(env) == NULL)
             JNU_ThrowOutOfMemoryError(env, 0);
         return 0;
     }
@@ -154,7 +159,7 @@ Java_java_util_zip_Inflater_inflateBytes(JNIEnv *env, jobject this, jlong addr,
         this_off += this_len - strm->avail_in;
         (*env)->SetIntField(env, this, offID, this_off);
         (*env)->SetIntField(env, this, lenID, strm->avail_in);
-        return len - strm->avail_out;
+        return (jint) (len - strm->avail_out);
     case Z_NEED_DICT:
         (*env)->SetBooleanField(env, this, needDictID, JNI_TRUE);
         /* Might have consumed some input here! */

src/share/native/java/util/zip/ZipFile.c

 /*
- * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -71,12 +71,14 @@ ThrowZipException(JNIEnv *env, const char *msg)
     if (msg != NULL) {
         s = JNU_NewStringPlatform(env, msg);
     }
+    if (s != NULL) {
         x = JNU_NewObjectByName(env,
                             "java/util/zip/ZipException",
                             "(Ljava/lang/String;)V", s);
         if (x != NULL) {
             (*env)->Throw(env, x);
         }
+    }
 }
 
 JNIEXPORT jlong JNICALL
@@ -363,8 +365,10 @@ Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
 
     /* If some names were found then build array of java strings */
     if (count > 0) {
-        jclass cls = (*env)->FindClass(env, "java/lang/String");
+        jclass cls = JNU_ClassString(env);
+        CHECK_NULL_RETURN(cls, NULL);
         result = (*env)->NewObjectArray(env, count, cls, 0);
+        CHECK_NULL_RETURN(result, NULL);
         if (result != 0) {
             for (i = 0; i < count; i++) {
                 jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);