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windows-nt/Source/XPSP1/NT/inetsrv/iis/svcs/dbgext/heapstat.cxx

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/*++
Copyright (c) 1995-1999 Microsoft Corporation
Module Name:
heapstat.cxx
Abstract:
This module contains an NTSD debugger extension for dumping various
heap statistics.
Author:
Keith Moore (keithmo) 01-Nov-1997
Revision History:
--*/
#include "inetdbgp.h"
#define MAX_SIZE 65536
// Large busy block (size exceeds MAX_SIZE)
#define MAX_LBBSIZE 1024
typedef struct _ENUM_CONTEXT {
BOOLEAN ContinueEnum;
ULONG FreeJumbo;
ULONG BusyJumbo;
ULONG FreeJumboBytes;
ULONG BusyJumboBytes;
ULONG BusyOverhead;
ULONG FreeOverhead;
ULONG FreeCounters[MAX_SIZE];
ULONG BusyCounters[MAX_SIZE];
ULONG LargeBusyBlock[MAX_LBBSIZE];
} ENUM_CONTEXT, *PENUM_CONTEXT;
#define BYTES_TO_K(cb) ( ( (cb) + 512 ) / 1024 )
/************************************************************
* Dump Heap Info
************************************************************/
BOOLEAN
CALLBACK
HspEnumHeapSegmentEntriesProc(
IN PVOID Param,
IN PHEAP_ENTRY LocalHeapEntry,
IN PHEAP_ENTRY RemoteHeapEntry
)
/*++
Routine Description:
Callback invoked for each heap entry within a heap segment.
Arguments:
Param - An uninterpreted parameter passed to the enumerator.
LocalHeapEntry - Pointer to a local copy of the HEAP_ENTRY structure.
RemoteHeapEntry - The remote address of the HEAP_ENTRY structure
in the debugee.
Return Value:
BOOLEAN - TRUE if the enumeration should continue, FALSE if it
should be terminated.
--*/
{
PENUM_CONTEXT context = (PENUM_CONTEXT)Param;
ULONG entryLength;
ULONG allocLength;
//
// Calculate the total length of this entry, including the heap
// header and any "slop" at the end of the block.
//
entryLength = (ULONG)LocalHeapEntry->Size << HEAP_GRANULARITY_SHIFT;
//
// From that, compute the number of bytes in use. This is the size
// of the allocation request as received from the application.
//
allocLength = entryLength - (ULONG)LocalHeapEntry->UnusedBytes;
//
// Adjust the appropriate accumulators.
//
if( LocalHeapEntry->Flags & HEAP_ENTRY_BUSY ) {
context->BusyOverhead += entryLength;
if( allocLength < MAX_SIZE ) {
context->BusyCounters[allocLength] += 1;
} else {
context->BusyJumbo += 1;
context->BusyJumboBytes += allocLength;
if (context->LargeBusyBlock[MAX_LBBSIZE-1] == 0) {
BOOL fFound = FALSE;
UINT i = 0;
for (; context->LargeBusyBlock[i] != 0 && i < MAX_LBBSIZE; i++) {
if( CheckControlC() ) {
context->ContinueEnum = FALSE;
return FALSE;
}
if (allocLength == context->LargeBusyBlock[i]) {
fFound = TRUE;
break;
}
}
if (!fFound && i < MAX_LBBSIZE-1) {
context->LargeBusyBlock[i] = allocLength;
}
}
}
} else {
context->FreeOverhead += entryLength;
if( allocLength < MAX_SIZE ) {
context->FreeCounters[allocLength] += 1;
} else {
context->FreeJumbo += 1;
context->FreeJumboBytes += allocLength;
}
}
return TRUE;
} // HspEnumHeapSegmentEntriesProc
BOOLEAN
CALLBACK
HspEnumHeapSegmentsProc(
IN PVOID Param,
IN PHEAP_SEGMENT LocalHeapSegment,
IN PHEAP_SEGMENT RemoteHeapSegment,
IN ULONG HeapSegmentIndex
)
/*++
Routine Description:
Callback invoked for each heap segment within a heap.
Arguments:
Param - An uninterpreted parameter passed to the enumerator.
LocalHeapSegment - Pointer to a local copy of the HEAP_SEGMENT
structure.
RemoteHeapSegment - The remote address of the HEAP_SEGMENT
structure in the debugee.
Return Value:
BOOLEAN - TRUE if the enumeration should continue, FALSE if it
should be terminated.
--*/
{
//
// Enumerate the entries for the specified segment.
//
if( !EnumHeapSegmentEntries(
LocalHeapSegment,
RemoteHeapSegment,
HspEnumHeapSegmentEntriesProc,
Param
) ) {
dprintf( "error retrieving heap segment entries\n" );
return FALSE;
}
return TRUE;
} // HspEnumHeapSegmentsProc
BOOLEAN
CALLBACK
HspEnumHeapsProc(
IN PVOID Param,
IN PHEAP LocalHeap,
IN PHEAP RemoteHeap,
IN ULONG HeapIndex
)
/*++
Routine Description:
Callback invoked for each heap within a process.
Arguments:
Param - An uninterpreted parameter passed to the enumerator.
LocalHeap - Pointer to a local copy of the HEAP structure.
RemoteHeap - The remote address of the HEAP structure in the debugee.
Return Value:
BOOLEAN - TRUE if the enumeration should continue, FALSE if it
should be terminated.
--*/
{
//
// Enumerate the segments for the specified heap.
//
if( !EnumHeapSegments(
LocalHeap,
RemoteHeap,
HspEnumHeapSegmentsProc,
Param
) ) {
dprintf( "error retrieving heap segments\n" );
return FALSE;
}
return TRUE;
} // HspEnumHeapsProc
DECLARE_API( heapstat )
/*++
Routine Description:
This function is called as an NTSD extension to format and dump
heap statistics.
Arguments:
hCurrentProcess - Supplies a handle to the current process (at the
time the extension was called).
hCurrentThread - Supplies a handle to the current thread (at the
time the extension was called).
CurrentPc - Supplies the current pc at the time the extension is
called.
lpExtensionApis - Supplies the address of the functions callable
by this extension.
lpArgumentString - Supplies the asciiz string that describes the
ansi string to be dumped.
Return Value:
None.
--*/
{
PENUM_CONTEXT context;
ULONG i;
ULONG busyBytes;
ULONG totalBusy;
ULONG totalFree;
ULONG totalBusyBytes;
ULONG lowerNoiseBound;
INIT_API();
//
// Setup.
//
context = (PENUM_CONTEXT)malloc( sizeof(*context) );
if( context == NULL ) {
dprintf( "out of memory\n" );
return;
}
RtlZeroMemory(
context,
sizeof(*context)
);
context->ContinueEnum = TRUE;
//
// Skip leading blanks.
//
while( *lpArgumentString == ' ' ||
*lpArgumentString == '\t' ) {
lpArgumentString++;
}
if( *lpArgumentString == '\0' ) {
lowerNoiseBound = 1;
} else {
lowerNoiseBound = strtoul( lpArgumentString, NULL, 16 );
}
//
// Enumerate the heaps, which will enumerate the segments, which
// will enumerate the entries, which will accumulate the statistics.
//
if( !EnumProcessHeaps(
HspEnumHeapsProc,
(PVOID)context
) ) {
dprintf( "error retrieving process heaps\n" );
free( context );
return;
}
//
// Dump 'em.
//
dprintf(
" Size : NumBusy : NumFree : BusyBytes\n"
);
totalBusy = 0;
totalFree = 0;
totalBusyBytes = 0;
for( i = 0 ; i < MAX_SIZE ; i++ ) {
if (CheckControlC())
goto cleanup;
busyBytes = i * context->BusyCounters[i];
if( context->BusyCounters[i] >= lowerNoiseBound ||
context->FreeCounters[i] >= lowerNoiseBound ) {
dprintf(
" %5lx : %8lx : %8lx : %8lx (%10ldK)\n",
i,
context->BusyCounters[i],
context->FreeCounters[i],
busyBytes,
BYTES_TO_K( busyBytes )
);
}
totalBusy += context->BusyCounters[i];
totalBusyBytes += busyBytes;
totalFree += context->FreeCounters[i];
}
if( context->BusyJumbo >= lowerNoiseBound ||
context->FreeJumbo >= lowerNoiseBound ) {
dprintf(
">%5lx : %8lx : %8lx : %8lx (%10ldK)\n",
MAX_SIZE,
context->BusyJumbo,
context->FreeJumbo,
context->BusyJumboBytes,
BYTES_TO_K( context->BusyJumboBytes )
);
totalBusy += context->BusyJumbo;
totalFree += context->FreeJumbo;
totalBusyBytes += context->BusyJumboBytes;
}
if (context->LargeBusyBlock[0] != 0) {
for (i = 0; i < MAX_LBBSIZE && context->LargeBusyBlock[i] != 0; i++) {
dprintf("%8lx : \n", context->LargeBusyBlock[i]);
}
}
dprintf(
" Total : %8lx : %8lx : %8lx (%10ldK)\n"
"\n"
" Total Heap Impact from Busy Blocks = %8lx (%10ldK)\n"
" Total Heap Impact from Free Blocks = %8lx (%10ldK)\n",
totalBusy,
totalFree,
totalBusyBytes,
BYTES_TO_K( totalBusyBytes ),
context->BusyOverhead,
BYTES_TO_K( context->BusyOverhead ),
context->FreeOverhead,
BYTES_TO_K( context->FreeOverhead )
);
cleanup:
free( context );
} // DECLARE_API( heapstat )
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