69 lines
2 KiB
C++
69 lines
2 KiB
C++
|
//*** dbutil.cpp -- debug helpers
|
||
|
|
// DESCRIPTION
|
||
|
|
// this file has the shared-source 'master' implementation. it is
|
||
|
|
// #included in each DLL that uses it.
|
||
|
|
// clients do something like:
|
||
|
|
// #include "priv.h" // for types, ASSERT, DM_*, DF_*, etc.
|
||
|
|
// #include "../lib/dbutil.cpp"
|
||
|
|
|
||
|
|
#ifdef DEBUG // {
|
||
|
|
|
||
|
|
#if ( _X86_)
|
||
|
|
|
||
|
|
// warning: these macros assume we have an ebp-linked chain. for debug we do.
|
||
|
|
#define BP_GETOLDBP(pbp) (*((int *)(pbp) + 0))
|
||
|
|
#define BP_GETRET(pbp) (*((int *)(pbp) + 1))
|
||
|
|
|
||
|
|
//*** DBGetStackBack -- walk stack frame
|
||
|
|
// #if 0 w/ sanity checks #endif
|
||
|
|
// ENTRY/EXIT
|
||
|
|
// pfp INOUT ptr to frame ptr (IN:starting, OUT:ending)
|
||
|
|
// pstkback OUT:fp/ret pairs, IN:optional size/addr pairs for sanity check
|
||
|
|
// nstkback ARRAYSIZE(pstckback)
|
||
|
|
// #if 0
|
||
|
|
// ncheck # of IN pstkback size/addr sanity-check pairs
|
||
|
|
// #endif
|
||
|
|
// n (return) # of frames successfully walked
|
||
|
|
// DESCRIPTION
|
||
|
|
// fills in OUT pstckback w/ backtrace info for nstckback frames.
|
||
|
|
// #if 0
|
||
|
|
// if ncheck > 0, makes sure that initial backtrace entries are in the
|
||
|
|
// range of the function specified by the IN size/addr pairs in pstkback.
|
||
|
|
// #endif
|
||
|
|
// NOTES
|
||
|
|
// not sure if we return the right pfp' value (untested)
|
||
|
|
int DBGetStackBack(int *pfp, struct DBstkback *pstkback, int nstkback /*,int nchk*/)
|
||
|
|
{
|
||
|
|
int fp = *pfp;
|
||
|
|
int ret;
|
||
|
|
int i = 0;
|
||
|
|
|
||
|
|
__try {
|
||
|
|
for (; i < nstkback; i++, pstkback++) {
|
||
|
|
ret = BP_GETRET(fp);
|
||
|
|
#if 0
|
||
|
|
if (i < ncheck && pstkback->ret != 0) {
|
||
|
|
ASSERT(pstkback->fp == 0 || pstkback->fp == -1 || pstkback->fp <= 512);
|
||
|
|
if (!(pstkback->ret <= ret && ret <= pstkback->ret + pstkback->fp)) {
|
||
|
|
// constraint violated
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
fp = BP_GETOLDBP(fp);
|
||
|
|
pstkback->ret = ret;
|
||
|
|
pstkback->fp = fp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
__except(EXCEPTION_EXECUTE_HANDLER) {
|
||
|
|
TraceMsg(TF_ALWAYS, "atm: GPF");
|
||
|
|
// just use last 'ret' we had
|
||
|
|
}
|
||
|
|
|
||
|
|
*pfp = fp;
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
#endif // }
|