# HG changeset patch
# User kzhaldyb
# Date 1472051409 -10800
#      Wed Aug 24 18:10:09 2016 +0300
# Node ID 270ae0a3d58680857ad1894aaa316fa0059fcbc7
# Parent  f37577c20a6bcad942dc58b61664d48097279015
8164738: Convert AltHashing_test to GTest
Reviewed-by: duke

diff --git a/src/share/vm/classfile/altHashing.cpp b/src/share/vm/classfile/altHashing.cpp
--- a/src/share/vm/classfile/altHashing.cpp
+++ b/src/share/vm/classfile/altHashing.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2016, 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
@@ -205,103 +205,3 @@
 juint AltHashing::murmur3_32(const int* data, int len) {
   return murmur3_32(0, data, len);
 }
-
-#ifndef PRODUCT
-// Overloaded versions for internal test.
-juint AltHashing::murmur3_32(const jbyte* data, int len) {
-  return murmur3_32(0, data, len);
-}
-
-juint AltHashing::murmur3_32(const jchar* data, int len) {
-  return murmur3_32(0, data, len);
-}
-
-// Internal test for alternate hashing.  Translated from JDK version
-// test/sun/misc/Hashing.java
-static const jbyte ONE_BYTE[] = { (jbyte) 0x80};
-static const jbyte TWO_BYTE[] = { (jbyte) 0x80, (jbyte) 0x81};
-static const jchar ONE_CHAR[] = { (jchar) 0x8180};
-static const jbyte THREE_BYTE[] = { (jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82};
-static const jbyte FOUR_BYTE[] = { (jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82, (jbyte) 0x83};
-static const jchar TWO_CHAR[] = { (jchar) 0x8180, (jchar) 0x8382};
-static const jint ONE_INT[] = { (jint)0x83828180};
-static const jbyte SIX_BYTE[] = { (jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82, (jbyte) 0x83, (jbyte) 0x84, (jbyte) 0x85};
-static const jchar THREE_CHAR[] = { (jchar) 0x8180, (jchar) 0x8382, (jchar) 0x8584};
-static const jbyte EIGHT_BYTE[] = {
-  (jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82,
-  (jbyte) 0x83, (jbyte) 0x84, (jbyte) 0x85,
-  (jbyte) 0x86, (jbyte) 0x87};
-static const jchar FOUR_CHAR[] = {
-  (jchar) 0x8180, (jchar) 0x8382,
-  (jchar) 0x8584, (jchar) 0x8786};
-
-static const jint TWO_INT[] = { (jint)0x83828180, (jint)0x87868584};
-
-static const juint MURMUR3_32_X86_CHECK_VALUE = 0xB0F57EE3;
-
-void AltHashing::testMurmur3_32_ByteArray() {
-  // printf("testMurmur3_32_ByteArray\n");
-
-  jbyte vector[256];
-  jbyte hashes[4 * 256];
-
-  for (int i = 0; i < 256; i++) {
-    vector[i] = (jbyte) i;
-  }
-
-  // Hash subranges {}, {0}, {0,1}, {0,1,2}, ..., {0,...,255}
-  for (int i = 0; i < 256; i++) {
-    juint hash = murmur3_32(256 - i, vector, i);
-    hashes[i * 4] = (jbyte) hash;
-    hashes[i * 4 + 1] = (jbyte)(hash >> 8);
-    hashes[i * 4 + 2] = (jbyte)(hash >> 16);
-    hashes[i * 4 + 3] = (jbyte)(hash >> 24);
-  }
-
-  // hash to get const result.
-  juint final_hash = murmur3_32(hashes, 4*256);
-
-  assert (MURMUR3_32_X86_CHECK_VALUE == final_hash,
-          "Calculated hash result not as expected. Expected %08X got %08X\n",
-          MURMUR3_32_X86_CHECK_VALUE,
-          final_hash);
-}
-
-void AltHashing::testEquivalentHashes() {
-  juint jbytes, jchars, ints;
-
-  // printf("testEquivalentHashes\n");
-
-  jbytes = murmur3_32(TWO_BYTE, 2);
-  jchars = murmur3_32(ONE_CHAR, 1);
-  assert (jbytes == jchars,
-          "Hashes did not match. b:%08x != c:%08x\n", jbytes, jchars);
-
-  jbytes = murmur3_32(FOUR_BYTE, 4);
-  jchars = murmur3_32(TWO_CHAR, 2);
-  ints = murmur3_32(ONE_INT, 1);
-  assert ((jbytes == jchars) && (jbytes == ints),
-          "Hashes did not match. b:%08x != c:%08x != i:%08x\n", jbytes, jchars, ints);
-
-  jbytes = murmur3_32(SIX_BYTE, 6);
-  jchars = murmur3_32(THREE_CHAR, 3);
-  assert (jbytes == jchars,
-         "Hashes did not match. b:%08x != c:%08x\n", jbytes, jchars);
-
-  jbytes = murmur3_32(EIGHT_BYTE, 8);
-  jchars = murmur3_32(FOUR_CHAR, 4);
-  ints = murmur3_32(TWO_INT, 2);
-  assert ((jbytes == jchars) && (jbytes == ints),
-          "Hashes did not match. b:%08x != c:%08x != i:%08x\n", jbytes, jchars, ints);
-}
-
-// Returns true if the alternate hashcode is correct
-void AltHashing::test_alt_hash() {
-  testMurmur3_32_ByteArray();
-  testEquivalentHashes();
-}
-
-void AltHashing_test() {
-  AltHashing::test_alt_hash();
-}
-#endif // PRODUCT
diff --git a/src/share/vm/classfile/altHashing.hpp b/src/share/vm/classfile/altHashing.hpp
--- a/src/share/vm/classfile/altHashing.hpp
+++ b/src/share/vm/classfile/altHashing.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2016, 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
@@ -37,26 +37,18 @@
  */
 
 class AltHashing : AllStatic {
+  friend class AltHashingTest;
 
   // utility function copied from java/lang/Integer
   static juint Integer_rotateLeft(juint i, int distance) {
-    return (i << distance) | (i >> (32-distance));
+    return (i << distance) | (i >> (32 - distance));
   }
   static juint murmur3_32(const int* data, int len);
   static juint murmur3_32(juint seed, const int* data, int len);
 
-#ifndef PRODUCT
-  // Hashing functions used for internal testing
-  static juint murmur3_32(const jbyte* data, int len);
-  static juint murmur3_32(const jchar* data, int len);
-  static void testMurmur3_32_ByteArray();
-  static void testEquivalentHashes();
-#endif // PRODUCT
-
  public:
   static juint compute_seed();
   static juint murmur3_32(juint seed, const jbyte* data, int len);
   static juint murmur3_32(juint seed, const jchar* data, int len);
-  NOT_PRODUCT(static void test_alt_hash();)
 };
 #endif // SHARE_VM_CLASSFILE_ALTHASHING_HPP
diff --git a/src/share/vm/utilities/internalVMTests.cpp b/src/share/vm/utilities/internalVMTests.cpp
--- a/src/share/vm/utilities/internalVMTests.cpp
+++ b/src/share/vm/utilities/internalVMTests.cpp
@@ -56,7 +56,6 @@
   run_unit_test(CollectedHeap_test);
   run_unit_test(QuickSort_test);
   run_unit_test(GuardedMemory_test);
-  run_unit_test(AltHashing_test);
   run_unit_test(TestNewSize_test);
   run_unit_test(TestOldSize_test);
   run_unit_test(TestKlass_test);
diff --git a/test/native/classfile/test_AltHashing.cpp b/test/native/classfile/test_AltHashing.cpp
new file mode 100644
--- /dev/null
+++ b/test/native/classfile/test_AltHashing.cpp
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2016, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+#include "precompiled.hpp"
+#include "classfile/altHashing.hpp"
+#include "unittest.hpp"
+
+// Internal test for alternate hashing.  Translated from JDK version
+// test/sun/misc/Hashing.java
+static const jbyte ONE_BYTE[] = {(jbyte) 0x80};
+static const jbyte TWO_BYTE[] = {(jbyte) 0x80, (jbyte) 0x81};
+static const jchar ONE_CHAR[] = {(jchar) 0x8180};
+static const jbyte THREE_BYTE[] = {(jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82};
+static const jbyte FOUR_BYTE[] = {(jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82, (jbyte) 0x83};
+static const jchar TWO_CHAR[] = {(jchar) 0x8180, (jchar) 0x8382};
+static const jint ONE_INT[] = {(jint) 0x83828180};
+static const jbyte SIX_BYTE[] = {(jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82, (jbyte) 0x83, (jbyte) 0x84, (jbyte) 0x85};
+static const jchar THREE_CHAR[] = {(jchar) 0x8180, (jchar) 0x8382, (jchar) 0x8584};
+static const jbyte EIGHT_BYTE[] = {
+  (jbyte) 0x80, (jbyte) 0x81, (jbyte) 0x82,
+  (jbyte) 0x83, (jbyte) 0x84, (jbyte) 0x85,
+  (jbyte) 0x86, (jbyte) 0x87
+};
+static const jchar FOUR_CHAR[] = {
+  (jchar) 0x8180, (jchar) 0x8382,
+  (jchar) 0x8584, (jchar) 0x8786
+};
+
+static const jint TWO_INT[] = {(jint) 0x83828180, (jint) 0x87868584};
+static const juint MURMUR3_32_X86_CHECK_VALUE = 0xB0F57EE3;
+
+class AltHashingTest : public ::testing::Test {
+ public:
+
+  static juint murmur3_32(const int* data, int len) {
+    return AltHashing::murmur3_32(data, len);
+  }
+};
+
+TEST_F(AltHashingTest, murmur3_32_byte_array_test) {
+  jbyte vector[256];
+  jbyte hashes[4 * 256];
+
+  for (int i = 0; i < 256; i++) {
+    vector[i] = (jbyte) i;
+  }
+
+  // Hash subranges {}, {0}, {0,1}, {0,1,2}, ..., {0,...,255}
+  for (int i = 0; i < 256; i++) {
+    juint hash = AltHashing::murmur3_32(256 - i, vector, i);
+    hashes[i * 4] = (jbyte) hash;
+    hashes[i * 4 + 1] = (jbyte) (hash >> 8);
+    hashes[i * 4 + 2] = (jbyte) (hash >> 16);
+    hashes[i * 4 + 3] = (jbyte) (hash >> 24);
+  }
+
+  // hash to get const result.
+  juint final_hash = AltHashing::murmur3_32(0, hashes, 4 * 256);
+
+  ASSERT_EQ(MURMUR3_32_X86_CHECK_VALUE, final_hash)
+          << "Calculated hash result not as expected.";
+}
+
+TEST_F(AltHashingTest, equivalent_hashes_test) {
+  juint jbytes, jchars, ints;
+
+  jbytes = AltHashing::murmur3_32(0, TWO_BYTE, 2);
+  jchars = AltHashing::murmur3_32(0, ONE_CHAR, 1);
+  ASSERT_EQ(jbytes, jchars) << "Hashes did not match.";
+
+  jbytes = AltHashing::murmur3_32(0, FOUR_BYTE, 4);
+  jchars = AltHashing::murmur3_32(0, TWO_CHAR, 2);
+  ints = AltHashingTest::murmur3_32(ONE_INT, 1);
+
+  ASSERT_EQ(jbytes, jchars) << "Hashes did not match.";
+  ASSERT_EQ(jbytes, ints) << "Hashes did not match.";
+
+  jbytes = AltHashing::murmur3_32(0, SIX_BYTE, 6);
+  jchars = AltHashing::murmur3_32(0, THREE_CHAR, 3);
+  ASSERT_EQ(jbytes, jchars) << "Hashes did not match.";
+
+  jbytes = AltHashing::murmur3_32(0, EIGHT_BYTE, 8);
+  jchars = AltHashing::murmur3_32(0, FOUR_CHAR, 4);
+  ints = AltHashingTest::murmur3_32(TWO_INT, 2);
+
+  ASSERT_EQ(jbytes, jchars) << "Hashes did not match.";
+  ASSERT_EQ(jbytes, ints) << "Hashes did not match.";
+}