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Use RLE (Run Length Encoding) to improve debugging performance.

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DEBUG_AGENT_REVISION is DEBUG_AGENT_REVISION_03 to disable this feature and will be changed to DEBUG_AGENT_REVISION_04 when new version of HOST is released.
Reduce the stack usage by re-using the same buffer to send/receive packet.
Zero out the buffer before fxsave so that the reserved field in the buffer remains 0 for better RLE compression ratio.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16628 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ruiyu Ni
2015-01-20 08:46:31 +00:00
committed by niruiyu
parent 6a39a6a1a8
commit d9044ec555
5 changed files with 282 additions and 111 deletions
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16
SourceLevelDebugPkg/Include/TransferProtocol.h
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@@ -2,7 +2,7 @@
Transfer protocol defintions used by debug agent and host. It is only
intended to be used by Debug related module implementation.
Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -20,12 +20,15 @@
//
// Current revision of transfer protocol
// 0.4: Packet compression and decompression.
//
#define DEBUG_AGENT_REVISION ((0 << 16) | 03)
#define DEBUG_AGENT_REVISION_03 ((0 << 16) | 03)
#define DEBUG_AGENT_REVISION_04 ((0 << 16) | 04)
#define DEBUG_AGENT_REVISION DEBUG_AGENT_REVISION_03
#define DEBUG_AGENT_CAPABILITIES 0
//
// Definitions for attach command
// Definitions for the (A)ttach command
//
#define DEBUG_STARTING_SYMBOL_ATTACH (0xFA)
@@ -34,10 +37,15 @@
//
#define DEBUG_STARTING_SYMBOL_NORMAL (0xFE)
//
// Definition for starting symbol of a (C)ompressed debug packet. Choose a non-ASCII to avoid conflict with other serial output.
//
#define DEBUG_STARTING_SYMBOL_COMPRESS (0xFC)
#pragma pack(1)
//
// Definition for debug packet header for normal debug packets (not including break/attach command)
// Definition for debug packet header for debug packets (not including attach command)
//
typedef struct {
UINT8 StartSymbol;