From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.93; helo=mga11.intel.com; envelope-from=shenglei.zhang@intel.com; receiver=edk2-devel@lists.01.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 4DEAE201B0400 for ; Sun, 24 Feb 2019 22:08:22 -0800 (PST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Feb 2019 22:08:22 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,410,1544515200"; d="scan'208";a="323089016" Received: from shenglei-dev.ccr.corp.intel.com ([10.239.158.52]) by fmsmga005.fm.intel.com with ESMTP; 24 Feb 2019 22:08:21 -0800 From: Shenglei Zhang To: edk2-devel@lists.01.org Cc: Michael D Kinney , Liming Gao Date: Mon, 25 Feb 2019 14:08:08 +0800 Message-Id: <20190225060808.15332-5-shenglei.zhang@intel.com> X-Mailer: git-send-email 2.18.0.windows.1 In-Reply-To: <20190225060808.15332-1-shenglei.zhang@intel.com> References: <20190225060808.15332-1-shenglei.zhang@intel.com> Subject: [PATCH 4/4] MdePkg/BaseUefiDecompressLib: Improve performance of boundary validation X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Feb 2019 06:08:22 -0000 The boundary validation checking in MakeTable() performs on every loop iteration. This could be improved by checking just once before the loop. https://bugzilla.tianocore.org/show_bug.cgi?id=1329 Cc: Michael D Kinney Cc: Liming Gao Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Shenglei Zhang --- .../Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c index c1e8c5581a..e979b18f0f 100644 --- a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c +++ b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c @@ -222,10 +222,10 @@ MakeTable ( if (Len <= TableBits) { - for (Index = Start[Len]; Index < NextCode; Index++) { - if (Index >= MaxTableLength) { - return (UINT16) BAD_TABLE; - } + if (Start[Len] + NextCode > MaxTableLength) { + return (UINT16) BAD_TABLE; + } + for (Index = Start[Len]; Index < NextCode; Index++) { Table[Index] = Char; } -- 2.18.0.windows.1