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From: Dandan Bi <dandan.bi@intel.com>
To: edk2-devel@lists.01.org
Cc: Max Knutsen <maknutse@microsoft.com>,
	Jian J Wang <jian.j.wang@intel.com>, Hao Wu <hao.a.wu@intel.com>,
	Michael Turner <Michael.Turner@microsoft.com>,
	Liming Gao <liming.gao@intel.com>
Subject: [patch] MdeModulePkg/ReportStatusCodeLib: Avoid using AllocatePool if possible
Date: Sat,  2 Feb 2019 16:46:54 +0800	[thread overview]
Message-ID: <20190202084654.34868-1-dandan.bi@intel.com> (raw)

From: Max Knutsen <maknutse@microsoft.com>

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1114

When report status code with ExtendedData data,
and the extended data can fit in the local static buffer,
there is no need to use AllocatePool to hold the ExtendedData data.

This patch is just to do the enhancement to avoid using AllocatePool.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
---
 .../Library/DxeReportStatusCodeLib/ReportStatusCodeLib.c | 9 +++++++--
 .../RuntimeDxeReportStatusCodeLib/ReportStatusCodeLib.c  | 9 +++++++--
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/MdeModulePkg/Library/DxeReportStatusCodeLib/ReportStatusCodeLib.c b/MdeModulePkg/Library/DxeReportStatusCodeLib/ReportStatusCodeLib.c
index b28dc5c3bb..c88be5a1a3 100644
--- a/MdeModulePkg/Library/DxeReportStatusCodeLib/ReportStatusCodeLib.c
+++ b/MdeModulePkg/Library/DxeReportStatusCodeLib/ReportStatusCodeLib.c
@@ -505,13 +505,18 @@ ReportStatusCodeEx (
   //
   Tpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
   gBS->RestoreTPL (Tpl);
 
   StatusCodeData = NULL;
-  if (Tpl <= TPL_NOTIFY) {
+  if (ExtendedDataSize <= (MAX_EXTENDED_DATA_SIZE - sizeof (EFI_STATUS_CODE_DATA))) {
     //
-    // Allocate space for the Status Code Header and its buffer
+    // Use Buffer instead of allocating if possible.
+    //
+    StatusCodeData = (EFI_STATUS_CODE_DATA *)Buffer;
+  } else if (Tpl <= TPL_NOTIFY){
+    //
+    // If Buffer is not big enough, allocate space for the Status Code Header and its buffer
     //
     gBS->AllocatePool (EfiBootServicesData, sizeof (EFI_STATUS_CODE_DATA) + ExtendedDataSize, (VOID **)&StatusCodeData);
   }
 
   if (StatusCodeData == NULL) {
diff --git a/MdeModulePkg/Library/RuntimeDxeReportStatusCodeLib/ReportStatusCodeLib.c b/MdeModulePkg/Library/RuntimeDxeReportStatusCodeLib/ReportStatusCodeLib.c
index b73103517a..3380469759 100644
--- a/MdeModulePkg/Library/RuntimeDxeReportStatusCodeLib/ReportStatusCodeLib.c
+++ b/MdeModulePkg/Library/RuntimeDxeReportStatusCodeLib/ReportStatusCodeLib.c
@@ -635,11 +635,14 @@ ReportStatusCodeEx (
   if (mHaveExitedBootServices) {
     if (sizeof (EFI_STATUS_CODE_DATA) + ExtendedDataSize > MAX_EXTENDED_DATA_SIZE) {
       return EFI_OUT_OF_RESOURCES;
     }
     StatusCodeData = (EFI_STATUS_CODE_DATA *) StatusCodeBuffer;
-  } else  {
+  } else if (sizeof (EFI_STATUS_CODE_DATA) + ExtendedDataSize > MAX_EXTENDED_DATA_SIZE) {
+    //
+    // Only use AllocatePool for larger ExtendedData.
+    //
     if (gBS == NULL || gBS->AllocatePool == NULL || gBS->FreePool == NULL) {
       return EFI_UNSUPPORTED;
     }
 
     //
@@ -648,10 +651,12 @@ ReportStatusCodeEx (
     StatusCodeData = NULL;
     gBS->AllocatePool (EfiBootServicesData, sizeof (EFI_STATUS_CODE_DATA) + ExtendedDataSize, (VOID **)&StatusCodeData);
     if (StatusCodeData == NULL) {
       return EFI_OUT_OF_RESOURCES;
     }
+  } else {
+    StatusCodeData = (EFI_STATUS_CODE_DATA *) StatusCodeBuffer;
   }
 
   //
   // Fill in the extended data header
   //
@@ -678,11 +683,11 @@ ReportStatusCodeEx (
   Status = InternalReportStatusCode (Type, Value, Instance, CallerId, StatusCodeData);
 
   //
   // Free the allocated buffer
   //
-  if (!mHaveExitedBootServices) {
+  if (!mHaveExitedBootServices && (StatusCodeData != (EFI_STATUS_CODE_DATA *) StatusCodeBuffer)) {
     gBS->FreePool (StatusCodeData);
   }
 
   return Status;
 }
-- 
2.18.0.windows.1



             reply	other threads:[~2019-02-02  8:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-02  8:46 Dandan Bi [this message]
2019-02-12 11:01 ` [patch] MdeModulePkg/ReportStatusCodeLib: Avoid using AllocatePool if possible Gao, Liming

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