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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* Poor-man profiling.
*
* @author José Fonseca <jrfonseca@tungstengraphics.com>
*
* @sa http://blogs.msdn.com/joshpoley/archive/2008/03/12/poor-man-s-profiler.aspx
* @sa http://www.johnpanzer.com/aci_cuj/index.html
*/
#include "pipe/p_config.h"
#if defined(PROFILE) && defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
#include <windows.h>
#include <winddi.h>
#include "pipe/p_debug.h"
#include "util/u_string.h"
#define PROFILE_FILE_SIZE 4*1024*1024
#define FILE_NAME_SIZE 256
static WCHAR wFileName[FILE_NAME_SIZE] = L"\\??\\c:\\00000000.trace";
static ULONG_PTR iFile = 0;
static BYTE *pMap = NULL;
static BYTE *pMapBegin = NULL;
static BYTE *pMapEnd = NULL;
void __declspec(naked) __cdecl
debug_profile_close(void)
{
_asm {
push eax
push ebx
push ecx
push edx
push ebp
push edi
push esi
}
if(iFile) {
EngUnmapFile(iFile);
/* Truncate the file */
pMap = EngMapFile(wFileName, pMap - pMapBegin, &iFile);
if(pMap)
EngUnmapFile(iFile);
}
iFile = 0;
pMapBegin = pMapEnd = pMap = NULL;
_asm {
pop esi
pop edi
pop ebp
pop edx
pop ecx
pop ebx
pop eax
ret
}
}
void __declspec(naked) __cdecl
debug_profile_open(void)
{
WCHAR *p;
_asm {
push eax
push ebx
push ecx
push edx
push ebp
push edi
push esi
}
debug_profile_close();
// increment starting from the less significant digit
p = &wFileName[14];
while(1) {
if(*p == '9') {
*p-- = '0';
}
else {
*p += 1;
break;
}
}
pMap = EngMapFile(wFileName, PROFILE_FILE_SIZE, &iFile);
if(pMap) {
pMapBegin = pMap;
pMapEnd = pMap + PROFILE_FILE_SIZE;
}
_asm {
pop esi
pop edi
pop ebp
pop edx
pop ecx
pop ebx
pop eax
ret
}
}
/**
* Called at the start of every method or function.
*
* @sa http://msdn.microsoft.com/en-us/library/c63a9b7h.aspx
*/
void __declspec(naked) __cdecl
_penter(void) {
_asm {
push ebx
retry:
mov ebx, [pMap]
test ebx, ebx
jz done
cmp ebx, [pMapEnd]
jne ready
call debug_profile_open
jmp retry
ready:
push eax
push edx
mov eax, [esp+12]
and eax, 0xfffffffe
mov [ebx], eax
add ebx, 4
rdtsc
mov [ebx], eax
add ebx, 4
mov [pMap], ebx
pop edx
pop eax
done:
pop ebx
ret
}
}
/**
* Called at the end of Calls the end of every method or function.
*
* @sa http://msdn.microsoft.com/en-us/library/xc11y76y.aspx
*/
void __declspec(naked) __cdecl
_pexit(void) {
_asm {
push ebx
retry:
mov ebx, [pMap]
test ebx, ebx
jz done
cmp ebx, [pMapEnd]
jne ready
call debug_profile_open
jmp retry
ready:
push eax
push edx
mov eax, [esp+12]
or eax, 0x00000001
mov [ebx], eax
add ebx, 4
rdtsc
mov [ebx], eax
add ebx, 4
mov [pMap], ebx
pop edx
pop eax
done:
pop ebx
ret
}
}
/**
* Reference function for calibration.
*/
void __declspec(naked)
__debug_profile_reference(void) {
_asm {
call _penter
call _pexit
ret
}
}
void
debug_profile_start(void)
{
debug_profile_open();
if(pMap) {
unsigned i;
for(i = 0; i < 8; ++i) {
_asm {
call _penter
call __debug_profile_reference
call _pexit
}
}
}
}
void
debug_profile_stop(void)
{
debug_profile_close();
}
#endif /* PROFILE */
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