110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
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//+---------------------------------------------------------------------------
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// File: caiheap.h
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//
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// Contents: Heap debugging structures and routines for the heap code
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// in commnot
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//
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// History: 28-Oct-92 IsaacHe Created
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//
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//----------------------------------------------------------------------------
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#ifndef _CAIHEAP_H_
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#define _CAIHEAP_H_
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//
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// We keep a stack backtrace for each allocated block of memory. DEPTHTRACE
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// is the number of frames that we record
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//
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#define DEPTHTRACE 26 // depth of stack backtraces
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//
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// The AllocArena structure has this signature at its front. We put a
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// signature on the structure to allow external processes to snapshot the
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// debug information and do some minimal check to see they are looking at the
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// right stuff
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//
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const char HEAPSIG[] = { 'H', 'E', 'P', DEPTHTRACE };
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// We keep track of the stack backtraces of allocation calls
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// in these structues.
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struct HeapAllocRec {
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DWORD sum; // checksum of stack backtrace
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void *fTrace[ DEPTHTRACE ]; // stack backtrace
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DWORD count; // # of un-freed allocs from this place
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size_t bytes; // # of un-freed bytes from this place
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struct AllocArena *paa; // points back to the beginning...
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struct {
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DWORD count; // # of allocs from this place
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size_t bytes; // # of bytes from this place
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} total;
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union {
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struct HeapAllocRec *next; // next bucket in the hash list
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void *ImageBase; // base addr of containing module
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} u;
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};
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struct AllocArena {
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char Signature [ sizeof(HEAPSIG) ];
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char comment[ 32 ];
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CRITICAL_SECTION csExclusive; // ensures single writer
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struct {
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int KeepStackTrace:1; // are stack records being kept?
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} flags;
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ULONG cAllocs; // # of non zero Alloc calls
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ULONG czAllocs; // # of Alloc calls w/zero count
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ULONG cFrees; // # of Free calls
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ULONG cReAllocs; // # of realloc calls
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ULONG cMissed; // # of missed stack backtraces
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ULONG cRecords; // index of next free AllocRec entry
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ULONG cBytesNow; // # of bytes currently allocated
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ULONG cBytesTotal; // # of bytes ever allocated
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ULONG cTotalRecords; // Total # of AllocRecs
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ULONG cPaths; // # of distinct allocation paths
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struct {
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ULONG total[ 32 ]; // total number of allocations
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ULONG now[ 32 ]; // current # of simul allocs
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ULONG simul[ 32 ]; // highest # of simul allocs
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} Histogram;
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struct HeapAllocRec AllocRec[1]; // vector of records starts here..
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};
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/*
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* Allocators may want to associate one of these structures with every
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* allocation...
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*/
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struct AHeader {
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struct HeapAllocRec FAR *p;
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size_t size;
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};
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STDAPI_(struct AllocArena ** )
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AllocArenaAddr( void );
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STDAPI_( struct AllocArena * )
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AllocArenaCreate( DWORD memctx, char FAR *comment );
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STDAPI_( struct HeapAllocRec FAR * )
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AllocArenaRecordAlloc( struct AllocArena *paa, size_t bytes );
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STDAPI_(void)
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AllocArenaRecordReAlloc( struct HeapAllocRec FAR *vp,
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size_t oldbytes, size_t newbytes );
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STDAPI_(void)
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AllocArenaRecordFree( struct HeapAllocRec FAR *vp, size_t bytes );
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STDAPI_(void)
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AllocArenaDump( struct AllocArena *paa );
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STDAPI_( void )
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AllocArenaDumpRecord( struct HeapAllocRec FAR *bp );
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#endif // ifndef _CAIHEAP_H_
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