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/* $Id: prfcoremodseg.cpp.h 29 2009-07-01 20:30:29Z bird $ */
/** @file
* kProfiler Mark 2 - Core Module Segment 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.
*/
/**
* Adds a module segment.
*
* @returns Offset to the module if existing or successfully added
* @returns 0 if not found.
*
* @param pHdr The profiler header.
* @param pModSeg Pointer to the module segment to insert (it's copied of course).
* @param off The offset into the modseg area which has been searched.
* (This is relative to the first moddule segment record (at pHdr->offModSegs).)
*/
static KU32 KPRF_NAME(InsertModSeg)(KPRF_TYPE(P,HDR) pHdr, KPRF_TYPE(PC,MODSEG) pModSeg, KU32 off)
{
/*
* Lookup the module segment, inserting it if not found (and there is room).
*/
for (;;)
{
if (off >= pHdr->cbModSegs)
{
/*
* It was the end, let's try insert it.
*
* This is where we lock the modseg stuff. The deal is that we
* serialize the actual inserting without blocking lookups. This
* means that we may end up with potential racing inserts, but
* unless there is a large amount of modules being profiled that's
* probably not going to be much of a problem. Anyway if we race,
* we'll simply have to search the new additions before we add our
* own stuff.
*/
KPRF_MODSEGS_LOCK();
if (off >= pHdr->cbModSegs)
{
KU32 cbModSeg = KPRF_OFFSETOF(MODSEG, szPath[pModSeg->cchPath + 1]);
cbModSeg = KPRF_ALIGN(cbModSeg, KPRF_SIZEOF(UPTR));
if (off + cbModSeg <= pHdr->cbMaxModSegs)
{
KPRF_TYPE(P,MODSEG) pNew = KPRF_OFF2PTR(P,MODSEG, off + pHdr->offModSegs, pHdr);
pNew->uBasePtr = pModSeg->uBasePtr;
pNew->cbSegmentMinusOne = pModSeg->cbSegmentMinusOne;
pNew->iSegment = pModSeg->iSegment;
pNew->fLoaded = pModSeg->fLoaded;
pNew->cchPath = pModSeg->cchPath;
KI32 iPath = pModSeg->cchPath;
do pNew->szPath[iPath] = pModSeg->szPath[iPath];
while (--iPath >= 0);
/* commit it */
KPRF_ATOMIC_SET32(&pHdr->cbModSegs, off + cbModSeg);
off += pHdr->offModSegs;
}
else
off = 0;
KPRF_MODSEGS_UNLOCK();
return off;
}
KPRF_MODSEGS_UNLOCK();
/* someone raced us, check the new entries. */
}
/*
* Match?
*/
KPRF_TYPE(PC,MODSEG) pCur = KPRF_OFF2PTR(P,MODSEG, off + pHdr->offModSegs, pHdr);
if ( pCur->uBasePtr == pModSeg->uBasePtr
&& pCur->fLoaded == pModSeg->fLoaded
&& pCur->cchPath == pModSeg->cchPath
&& pCur->iSegment == pModSeg->iSegment
&& pCur->cbSegmentMinusOne == pModSeg->cbSegmentMinusOne
)
{
KI32 iPath = pModSeg->cchPath;
for (;;)
{
if (!iPath--)
return off + pHdr->offModSegs;
if (pModSeg->szPath[iPath] != pCur->szPath[iPath])
break;
}
/* didn't match, continue searching */
}
KU32 cbCur = KPRF_OFFSETOF(MODSEG, szPath[pCur->cchPath + 1]);
off += KPRF_ALIGN(cbCur, KPRF_SIZEOF(UPTR));
}
}
/**
* Queries data for and inserts a new module segment.
*
*
* @returns Offset to the module if existing or successfully added
* @returns 0 if not found.
*
* @param pHdr The profiler header.
* @param uPC Address within the module.
* @param off The offset into the modseg area which has been searched.
* (This is relative to the first moddule segment record (at pHdr->offModSegs).)
*/
static KU32 KPRF_NAME(NewModSeg)(KPRF_TYPE(P,HDR) pHdr, KPRF_TYPE(,UPTR) uPC, KU32 off)
{
/*
* Query the module name and object of the function.
*/
#pragma pack(1)
struct
{
KPRF_TYPE(,MODSEG) ModSeg;
char szMorePath[260];
} s;
#pragma pack()
if (KPRF_GET_MODSEG(uPC + pHdr->uBasePtr, s.ModSeg.szPath, sizeof(s.ModSeg.szPath) + sizeof(s.szMorePath),
&s.ModSeg.iSegment, &s.ModSeg.uBasePtr, &s.ModSeg.cbSegmentMinusOne))
return 0;
s.ModSeg.uBasePtr -= pHdr->uBasePtr;
s.ModSeg.fLoaded = 1;
s.ModSeg.cchPath = 0;
while (s.ModSeg.szPath[s.ModSeg.cchPath])
s.ModSeg.cchPath++;
return KPRF_NAME(InsertModSeg)(pHdr, &s.ModSeg, off);
}
/**
* Record a module segment.
*
* This is an internal worker for recording a module segment when adding
* a new function.
*
* @returns Offset to the module if existing or successfully added
* @returns 0 if not found.
*
* @param pHdr The profiler header.
* @param uPC Address within the module.
*/
static KU32 KPRF_NAME(RecordModSeg)(KPRF_TYPE(P,HDR) pHdr, KPRF_TYPE(,UPTR) uPC)
{
/*
* Lookup the module segment, inserting it if not found (and there is room).
*/
KU32 off = 0;
KPRF_TYPE(PC,MODSEG) pCur = KPRF_OFF2PTR(P,MODSEG, pHdr->offModSegs, pHdr);
const KU32 cbModSegs = pHdr->cbModSegs;
for (;;)
{
/* done and not found? */
if (off >= cbModSegs)
return KPRF_NAME(NewModSeg)(pHdr, uPC, off);
/*
* Match?
*/
if ( pCur->fLoaded
&& uPC - pCur->uBasePtr <= pCur->cbSegmentMinusOne)
return off + pHdr->offModSegs;
KU32 cbCur = KPRF_OFFSETOF(MODSEG, szPath[pCur->cchPath + 1]);
cbCur = KPRF_ALIGN(cbCur, KPRF_SIZEOF(UPTR));
off += cbCur;
pCur = (KPRF_TYPE(PC,MODSEG))((KU8 *)pCur + cbCur);
}
}
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