Mercurial > hg > icedtea7-forest-aarch64 > jdk
changeset 8146:9d61c33f8555
8044659: Java SecureRandom on SPARC T4 much slower than on x86/Linux
Reviewed-by: mullan
Contributed-by: Bradford Wetmore <bradford.wetmore@oracle.com>
author | robm |
---|---|
date | Fri, 25 Jul 2014 19:49:06 +0100 |
parents | d57bc4eb4227 |
children | d6c2529b5a24 |
files | src/share/classes/sun/security/provider/SecureRandom.java |
diffstat | 1 files changed, 28 insertions(+), 7 deletions(-) [+] |
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--- a/src/share/classes/sun/security/provider/SecureRandom.java Tue Jul 22 22:06:52 2014 +0400 +++ b/src/share/classes/sun/security/provider/SecureRandom.java Fri Jul 25 19:49:06 2014 +0100 @@ -1,5 +1,5 @@ /* - * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1998, 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 @@ -29,6 +29,7 @@ import java.security.MessageDigest; import java.security.SecureRandomSpi; import java.security.NoSuchAlgorithmException; +import java.security.NoSuchProviderException; /** * <p>This class provides a crytpographically strong pseudo-random number @@ -94,9 +95,19 @@ */ private void init(byte[] seed) { try { - digest = MessageDigest.getInstance ("SHA"); - } catch (NoSuchAlgorithmException e) { - throw new InternalError("internal error: SHA-1 not available."); + /* + * Use the local SUN implementation to avoid native + * performance overhead. + */ + digest = MessageDigest.getInstance("SHA", "SUN"); + } catch (NoSuchProviderException | NoSuchAlgorithmException e) { + // Fallback to any available. + try { + digest = MessageDigest.getInstance("SHA"); + } catch (NoSuchAlgorithmException exc) { + throw new InternalError( + "internal error: SHA-1 not available."); + } } if (seed != null) { @@ -258,9 +269,19 @@ s.defaultReadObject (); try { - digest = MessageDigest.getInstance ("SHA"); - } catch (NoSuchAlgorithmException e) { - throw new InternalError("internal error: SHA-1 not available."); + /* + * Use the local SUN implementation to avoid native + * performance overhead. + */ + digest = MessageDigest.getInstance("SHA", "SUN"); + } catch (NoSuchProviderException | NoSuchAlgorithmException e) { + // Fallback to any available. + try { + digest = MessageDigest.getInstance("SHA"); + } catch (NoSuchAlgorithmException exc) { + throw new InternalError( + "internal error: SHA-1 not available."); + } } } }