IntelFrameworkModulePkg GenericBdsLib: Do not assume perf entry count has no change

Current implementation assumes the performance entry count has no change from
multiple GetPerformanceMeasurement() while loops, it may cause the allocated buffer
for PerfEntriesAsDxeHandle at the first loop to be overflowed if the following loop has
the count changed.

This patch is also to sync the change at
commit R18417 "MdeModulePkg: Fix a performance data buffer overrun issue".

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18562 6f19259b-4bc3-4df7-8a09-765794883524

IntelFrameworkModulePkg/Library/GenericBdsLib/Performance.c

@@ -168,13 +168,8 @@ WriteBootToOsPerformanceData (
   UINT64                    StartValue;
   UINT64                    EndValue;
   BOOLEAN                   CountUp;
-  UINTN                     EntryIndex;
-  UINTN                     NumPerfEntries;
-  //
-  // List of flags indicating PerfEntry contains DXE handle
-  //
-  BOOLEAN                   *PerfEntriesAsDxeHandle;
   UINTN                     VarSize;
+  BOOLEAN                   Found;
 
   //
   // Record the performance data for End of BDS
@@ -203,6 +198,11 @@ WriteBootToOsPerformanceData (
     CountUp            = FALSE;
   }
 
+  //
+  // Reset the entry count
+  //
+  mPerfHeader.Count = 0;
+
   if (mAcpiLowMemoryBase == 0x0FFFFFFFF) {
     VarSize = sizeof (EFI_PHYSICAL_ADDRESS);
     Status = gRT->GetVariable (
@@ -238,7 +238,9 @@ WriteBootToOsPerformanceData (
   Ptr        = (UINT8 *) ((UINT32) mAcpiLowMemoryBase + sizeof (PERF_HEADER));
   LimitCount = (UINT32) (PERF_DATA_MAX_LENGTH - sizeof (PERF_HEADER)) / sizeof (PERF_DATA);
 
-  NumPerfEntries = 0;
+  //
+  // Get performance data
+  //
   LogEntryKey = 0;
   while ((LogEntryKey = GetPerformanceMeasurement (
                           LogEntryKey,
@@ -247,76 +249,7 @@ WriteBootToOsPerformanceData (
                           &Module,
                           &StartTicker,
                           &EndTicker)) != 0) {
-    NumPerfEntries++;
+    if (EndTicker != 0) {
-  }
-  PerfEntriesAsDxeHandle = AllocateZeroPool (NumPerfEntries * sizeof (BOOLEAN));
-  ASSERT (PerfEntriesAsDxeHandle != NULL);
-  
-  //
-  // Get DXE drivers performance
-  //
-  for (Index = 0; Index < NoHandles; Index++) {
-    Ticker = 0;
-    LogEntryKey = 0;
-    EntryIndex  = 0;
-    while ((LogEntryKey = GetPerformanceMeasurement (
-                            LogEntryKey,
-                            &Handle,
-                            &Token,
-                            &Module,
-                            &StartTicker,
-                            &EndTicker)) != 0) {
-      if (Handle == Handles[Index] && !PerfEntriesAsDxeHandle[EntryIndex]) {
-        PerfEntriesAsDxeHandle[EntryIndex] = TRUE;
-      }
-      EntryIndex++;
-      if ((Handle == Handles[Index]) && (EndTicker != 0)) {
-        if (StartTicker == 1) {
-          StartTicker = StartValue;
-        }
-        if (EndTicker == 1) {
-          EndTicker = StartValue;
-        }
-        Ticker += CountUp ? (EndTicker - StartTicker) : (StartTicker - EndTicker);
-      }
-    }
-
-    Duration = (UINT32) DivU64x32 (Ticker, (UINT32) Freq);
-
-    if (Duration > 0) {
-
-      GetNameFromHandle (Handles[Index], GaugeString);
-
-      AsciiStrCpyS (mPerfData.Token, PERF_TOKEN_SIZE, GaugeString);
-      mPerfData.Duration = Duration;
-
-      CopyMem (Ptr, &mPerfData, sizeof (PERF_DATA));
-      Ptr += sizeof (PERF_DATA);
-
-      mPerfHeader.Count++;
-      if (mPerfHeader.Count == LimitCount) {
-        goto Done;
-      }
-    }
-  }
-
-  //
-  // Get inserted performance data
-  //
-  LogEntryKey = 0;
-  EntryIndex  = 0;
-  while ((LogEntryKey = GetPerformanceMeasurement (
-                          LogEntryKey,
-                          &Handle,
-                          &Token,
-                          &Module,
-                          &StartTicker,
-                          &EndTicker)) != 0) {
-    if (!PerfEntriesAsDxeHandle[EntryIndex] && EndTicker != 0) {
-
-      ZeroMem (&mPerfData, sizeof (PERF_DATA));
-
-      AsciiStrnCpyS (mPerfData.Token, PERF_TOKEN_SIZE, Token, PERF_TOKEN_LENGTH);
       if (StartTicker == 1) {
         StartTicker = StartValue;
       }
@@ -325,7 +258,31 @@ WriteBootToOsPerformanceData (
       }
       Ticker = CountUp ? (EndTicker - StartTicker) : (StartTicker - EndTicker);
 
-      mPerfData.Duration = (UINT32) DivU64x32 (Ticker, (UINT32) Freq);
+      Duration = (UINT32) DivU64x32 (Ticker, (UINT32) Freq);
+      if (Duration == 0) {
+        continue;
+      }
+
+      ZeroMem (&mPerfData, sizeof (PERF_DATA));
+
+      mPerfData.Duration = Duration;
+
+      //
+      // See if the Handle is in the handle buffer
+      //
+      Found = FALSE;
+      for (Index = 0; Index < NoHandles; Index++) {
+        if (Handle == Handles[Index]) {
+          GetNameFromHandle (Handles[Index], GaugeString);
+          AsciiStrCpyS (mPerfData.Token, PERF_TOKEN_SIZE, GaugeString);
+          Found = TRUE;
+          break;
+        }
+      }
+
+      if (!Found) {
+        AsciiStrnCpyS (mPerfData.Token, PERF_TOKEN_SIZE, Token, PERF_TOKEN_LENGTH);
+      }
 
       CopyMem (Ptr, &mPerfData, sizeof (PERF_DATA));
       Ptr += sizeof (PERF_DATA);
@@ -335,13 +292,11 @@ WriteBootToOsPerformanceData (
         goto Done;
       }
     }
-    EntryIndex++;
   }
 
 Done:
 
   FreePool (Handles);
-  FreePool (PerfEntriesAsDxeHandle);
 
   mPerfHeader.Signiture = PERFORMANCE_SIGNATURE;