audk/PerformancePkg/Dp_App/DpUtilities.c

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/** @file
* Utility functions used by the Dp application.
*
* Copyright (c) 2009 - 2010, 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
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/TimerLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/PrintLib.h>
#include <Library/HiiLib.h>
#include <Library/PcdLib.h>
#include <Protocol/LoadedImage.h>
#include <Protocol/Driverbinding.h>
#include <Guid/Performance.h>
#include "Dp.h"
#include "Literals.h"
#include "DpInternal.h"
/** Calculate an event's duration in timer ticks.
*
* Given the count direction and the event's start and end timer values,
* calculate the duration of the event in timer ticks. Information for
* the current measurement is pointed to by the parameter.
*
* If the measurement's start time is 1, it indicates that the developer
* is indicating that the measurement began at the release of reset.
* The start time is adjusted to the timer's starting count before performing
* the elapsed time calculation.
*
* The calculated duration, in ticks, is the absolute difference between
* the measurement's ending and starting counts.
*
* @pre The global TimerInfo structure must have already been initialized
* before this function is called.
*
* @param[in,out] Measurement Pointer to a MEASUREMENT_RECORD structure containing
* data for the current measurement.
*
* @return The 64-bit duration of the event.
**/
UINT64
GetDuration (
IN OUT MEASUREMENT_RECORD *Measurement
)
{
UINT64 Duration;
BOOLEAN Error;
// PERF_START macros are called with a value of 1 to indicate
// the beginning of time. So, adjust the start ticker value
// to the real beginning of time.
// Assumes no wraparound. Even then, there is a very low probability
// of having a valid StartTicker value of 1.
if (Measurement->StartTimeStamp == 1) {
Measurement->StartTimeStamp = TimerInfo.StartCount;
}
if (TimerInfo.CountUp) {
Duration = Measurement->EndTimeStamp - Measurement->StartTimeStamp;
Error = (BOOLEAN)(Duration > Measurement->EndTimeStamp);
}
else {
Duration = Measurement->StartTimeStamp - Measurement->EndTimeStamp;
Error = (BOOLEAN)(Duration > Measurement->StartTimeStamp);
}
if (Error) {
DEBUG ((EFI_D_ERROR, ALit_TimerLibError));
Duration = 0;
}
return Duration;
}
/** Determine whether the Measurement record is for an EFI Phase.
*
* The Token and Module members of the measurement record are checked.
* Module must be empty and Token must be one of SEC, PEI, DXE, BDS, or SHELL.
*
* @param[in] Measurement A pointer to the Measurement record to test.
*
* @retval TRUE The measurement record is for an EFI Phase.
* @retval FALSE The measurement record is NOT for an EFI Phase.
**/
BOOLEAN
IsPhase(
IN MEASUREMENT_RECORD *Measurement
)
{
BOOLEAN RetVal;
RetVal = (BOOLEAN)( ( *Measurement->Module == '\0') &&
((AsciiStrnCmp (Measurement->Token, ALit_SEC, PERF_TOKEN_LENGTH) == 0) ||
(AsciiStrnCmp (Measurement->Token, ALit_PEI, PERF_TOKEN_LENGTH) == 0) ||
(AsciiStrnCmp (Measurement->Token, ALit_DXE, PERF_TOKEN_LENGTH) == 0) ||
(AsciiStrnCmp (Measurement->Token, ALit_BDS, PERF_TOKEN_LENGTH) == 0))
);
return RetVal;
}
/** Get the file name portion of the Pdb File Name.
*
* The portion of the Pdb File Name between the last backslash and
* either a following period or the end of the string is converted
* to Unicode and copied into UnicodeBuffer. The name is truncated,
* if necessary, to ensure that UnicodeBuffer is not overrun.
*
* @param[in] PdbFileName Pdb file name.
* @param[out] UnicodeBuffer The resultant Unicode File Name.
*
**/
VOID
GetShortPdbFileName (
IN CHAR8 *PdbFileName,
OUT CHAR16 *UnicodeBuffer
)
{
UINTN IndexA; // Current work location within an ASCII string.
UINTN IndexU; // Current work location within a Unicode string.
UINTN StartIndex;
UINTN EndIndex;
ZeroMem (UnicodeBuffer, DXE_PERFORMANCE_STRING_LENGTH * sizeof (CHAR16));
if (PdbFileName == NULL) {
StrCpy (UnicodeBuffer, L" ");
} else {
StartIndex = 0;
for (EndIndex = 0; PdbFileName[EndIndex] != 0; EndIndex++)
;
for (IndexA = 0; PdbFileName[IndexA] != 0; IndexA++) {
if (PdbFileName[IndexA] == '\\') {
StartIndex = IndexA + 1;
}
if (PdbFileName[IndexA] == '.') {
EndIndex = IndexA;
}
}
IndexU = 0;
for (IndexA = StartIndex; IndexA < EndIndex; IndexA++) {
UnicodeBuffer[IndexU] = (CHAR16) PdbFileName[IndexA];
IndexU++;
if (IndexU >= DXE_PERFORMANCE_STRING_LENGTH) {
UnicodeBuffer[DXE_PERFORMANCE_STRING_LENGTH] = 0;
break;
}
}
}
}
/** Get a human readable name for an image handle.
*
* @param[in] Handle
*
* @post The resulting Unicode name string is stored in the
* mGaugeString global array.
*
**/
VOID
GetNameFromHandle (
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *Image;
CHAR8 *PdbFileName;
EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
EFI_STRING StringPtr;
// Proactively get the error message so it will be ready if needed
StringPtr = HiiGetString (gHiiHandle, STRING_TOKEN (STR_DP_ERROR_NAME), NULL);
ASSERT (StringPtr != NULL);
// Get handle name from image protocol
//
Status = gBS->HandleProtocol (
Handle,
&gEfiLoadedImageProtocolGuid,
&Image
);
if (EFI_ERROR (Status)) {
Status = gBS->OpenProtocol (
Handle,
&gEfiDriverBindingProtocolGuid,
(VOID **) &DriverBinding,
NULL,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
StrCpy (mGaugeString, StringPtr);
return ;
}
// Get handle name from image protocol
//
Status = gBS->HandleProtocol (
DriverBinding->ImageHandle,
&gEfiLoadedImageProtocolGuid,
&Image
);
}
PdbFileName = PeCoffLoaderGetPdbPointer (Image->ImageBase);
if (PdbFileName != NULL) {
GetShortPdbFileName (PdbFileName, mGaugeString);
} else {
StrCpy (mGaugeString, StringPtr);
}
return ;
}
/** Calculate the Duration in microseconds.
*
* Duration is multiplied by 1000, instead of Frequency being divided by 1000 or
* multiplying the result by 1000, in order to maintain precision. Since Duration is
* a 64-bit value, multiplying it by 1000 is unlikely to produce an overflow.
*
* The time is calculated as (Duration * 1000) / Timer_Frequency.
*
* @param[in] Duration The event duration in timer ticks.
*
* @return A 64-bit value which is the Elapsed time in microseconds.
**/
UINT64
DurationInMicroSeconds (
IN UINT64 Duration
)
{
UINT64 Temp;
Temp = MultU64x32 (Duration, 1000);
return DivU64x32 (Temp, TimerInfo.Frequency);
}
/** Formatted Print using a Hii Token to reference the localized format string.
*
* @param[in] Token A HII token associated with a localized Unicode string.
*
* @return The number of characters converted by UnicodeVSPrint().
*
**/
UINTN
PrintToken (
IN UINT16 Token,
...
)
{
VA_LIST Marker;
EFI_STRING StringPtr;
UINTN Return;
UINTN BufferSize;
StringPtr = HiiGetString (gHiiHandle, Token, NULL);
ASSERT (StringPtr != NULL);
VA_START (Marker, Token);
BufferSize = (PcdGet32 (PcdUefiLibMaxPrintBufferSize) + 1) * sizeof (CHAR16);
if (mPrintTokenBuffer == NULL) {
mPrintTokenBuffer = AllocatePool (BufferSize);
ASSERT (mPrintTokenBuffer != NULL);
}
SetMem( mPrintTokenBuffer, BufferSize, 0);
Return = UnicodeVSPrint (mPrintTokenBuffer, BufferSize, StringPtr, Marker);
if (Return > 0 && gST->ConOut != NULL) {
gST->ConOut->OutputString (gST->ConOut, mPrintTokenBuffer);
}
return Return;
}
/** Get index of Measurement Record's match in the CumData array.
*
* If the Measurement's Token value matches a Token in one of the CumData
* records, the index of the matching record is returned. The returned
* index is a signed value so that negative values can indicate that
* the Measurement didn't match any entry in the CumData array.
*
* @param[in] Measurement A pointer to a Measurement Record to match against the CumData array.
*
* @retval <0 Token is not in the CumData array.
* @retval >=0 Return value is the index into CumData where Token is found.
**/
INTN
GetCumulativeItem(
IN MEASUREMENT_RECORD *Measurement
)
{
INTN Index;
for( Index = 0; Index < (INTN)NumCum; ++Index) {
if (AsciiStrnCmp (Measurement->Token, CumData[Index].Name, PERF_TOKEN_LENGTH) == 0) {
return Index; // Exit, we found a match
}
}
// If the for loop exits, Token was not found.
return -1; // Indicate failure
}