6858865: Fix for 6728376 causes regression if the size of "data" is 0 and...

6858865: Fix for 6728376 causes regression if the size of "data" is 0 and malloc returns Null for 0-length
Summary: don't throw OOME when in or out buffer size is 0 length
Reviewed-by: alanb

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

@@ -132,6 +132,8 @@ Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr,
 
         in_buf = (jbyte *) malloc(this_len);
         if (in_buf == 0) {
+            // Throw OOME only when length is not zero
+            if (this_len != 0)
                 JNU_ThrowOutOfMemoryError(env, 0);
             return 0;
         }
@@ -139,6 +141,7 @@ Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr,
         out_buf = (jbyte *) malloc(len);
         if (out_buf == 0) {
             free(in_buf);
+            if (len != 0)
                 JNU_ThrowOutOfMemoryError(env, 0);
             return 0;
         }
@@ -173,6 +176,7 @@ Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr,
         jboolean finish = (*env)->GetBooleanField(env, this, finishID);
         in_buf = (jbyte *) malloc(this_len);
         if (in_buf == 0) {
+            if (this_len != 0)
                 JNU_ThrowOutOfMemoryError(env, 0);
             return 0;
         }
@@ -181,6 +185,7 @@ Java_java_util_zip_Deflater_deflateBytes(JNIEnv *env, jobject this, jlong addr,
         out_buf = (jbyte *) malloc(len);
         if (out_buf == 0) {
             free(in_buf);
+            if (len != 0)
                 JNU_ThrowOutOfMemoryError(env, 0);
             return 0;
         }

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

@@ -135,6 +135,7 @@ Java_java_util_zip_Inflater_inflateBytes(JNIEnv *env, jobject this, jlong addr,
 
     in_buf = (jbyte *) malloc(in_len);
     if (in_buf == 0) {
+        if (in_len != 0)
             JNU_ThrowOutOfMemoryError(env, 0);
         return 0;
     }
@@ -143,6 +144,7 @@ Java_java_util_zip_Inflater_inflateBytes(JNIEnv *env, jobject this, jlong addr,
     out_buf = (jbyte *) malloc(len);
     if (out_buf == 0) {
         free(in_buf);
+        if (len != 0)
             JNU_ThrowOutOfMemoryError(env, 0);
         return 0;
     }