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/* $Id: prfcorefunction.cpp.h 29 2009-07-01 20:30:29Z bird $ */
/** @file
* kProfiler Mark 2 - Core NewFunction Code Template.
*/
/*
* Copyright (c) 2006-2007 Knut St. Osmundsen <bird-kStuff-spamix@anduin.net>
*
* 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, sublicense, 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 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS 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.
*/
/**
* Creates a new function.
*
* @returns Pointer to the new function.
* @returns NULL if we're out of space.
*/
static KPRF_TYPE(P,FUNC) KPRF_NAME(NewFunction)(KPRF_TYPE(P,HDR) pHdr,KPRF_TYPE(,UPTR) uPC)
{
/*
* First find the position of the function (it might actually have been inserted by someone else by now too).
*/
KPRF_FUNCS_WRITE_LOCK();
KPRF_TYPE(P,FUNC) paFunctions = KPRF_OFF2PTR(P,FUNC, pHdr->offFunctions, pHdr);
KI32 iStart = 0;
KI32 iLast = pHdr->cFunctions - 1;
KI32 i = iLast / 2;
for (;;)
{
KU32 iFunction = pHdr->aiFunctions[i];
KPRF_TYPE(,IPTR) iDiff = uPC - paFunctions[iFunction].uEntryPtr;
if (!iDiff)
{
KPRF_FUNCS_WRITE_UNLOCK();
return &paFunctions[iFunction];
}
if (iLast == iStart)
break;
if (iDiff < 0)
iLast = i - 1;
else
iStart = i + 1;
if (iLast < iStart)
break;
i = iStart + (iLast - iStart) / 2;
}
/*
* Adjust the index so we're exactly in the right spot.
* (I've too much of a headache to figure out if the above loop leaves us where we should be.)
*/
const KI32 iNew = pHdr->cFunctions;
if (paFunctions[pHdr->aiFunctions[i]].uEntryPtr > uPC)
{
while ( i > 0
&& paFunctions[pHdr->aiFunctions[i - 1]].uEntryPtr > uPC)
i--;
}
else
{
while ( i < iNew
&& paFunctions[pHdr->aiFunctions[i]].uEntryPtr < uPC)
i++;
}
/*
* Ensure that there still is space for the function.
*/
if (iNew >= (KI32)pHdr->cMaxFunctions)
{
KPRF_FUNCS_WRITE_UNLOCK();
return NULL;
}
pHdr->cFunctions++;
KPRF_TYPE(P,FUNC) pNew = &paFunctions[iNew];
/* init the new function entry */
pNew->uEntryPtr = uPC;
pNew->offModSeg = 0;
pNew->cOnStack = 0;
pNew->cCalls = 0;
pNew->OnStack.MinTicks = ~(KU64)0;
pNew->OnStack.MaxTicks = 0;
pNew->OnStack.SumTicks = 0;
pNew->OnTopOfStack.MinTicks = ~(KU64)0;
pNew->OnTopOfStack.MaxTicks = 0;
pNew->OnTopOfStack.SumTicks = 0;
/* shift the function index array and insert the new one. */
KI32 j = iNew;
while (j > i)
{
pHdr->aiFunctions[j] = pHdr->aiFunctions[j - 1];
j--;
}
pHdr->aiFunctions[i] = iNew;
KPRF_FUNCS_WRITE_UNLOCK();
/*
* Record the module segment (i.e. add it if it's new).
*/
pNew->offModSeg = KPRF_NAME(RecordModSeg)(pHdr, uPC);
return pNew;
}
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