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727 lines
20 KiB
727 lines
20 KiB
/*****************************************************************************\
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* DHCMP - Compare DH.EXE outputs.
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*
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* Copyright (c) 1995-2000 Microsoft Corporation. All rights reserved.
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*
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* DHCMP is a character-mode tool which processes DH output file(s) into forms
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* which may be more useful in investigate memory leaks etc.
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*
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* DH is a useful tool which displays heap allocations in a properly enabled
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* system, but the output is sometimes hard to analyze and interpret.
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* The output is a list of allocation backtraces: each backtrace contains up to
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* MAX_BT call-sites, and is accompanied by the number of bytes allocated.
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*
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* 02-01-95 IanJa bugfixes and handle BackTraceNNNNN identifiers from dh.exe
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* 03/22/95 IanJa modify to cope with current DH output format.
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* 07/27/98 t-mattba added -v switch
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\*****************************************************************************/
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char *pszHow =
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" DHCMP has two modes:\n"
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"\n"
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" 1) DHCMP [-d] dh_dump1.txt dh_dump2.txt\n"
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" This compares two DH dumps, useful for finding leaks.\n"
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" dh_dump1.txt & dh_dump2.txt are obtained before and after some test\n"
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" scenario. DHCMP matches the backtraces from each file and calculates\n"
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" the increase in bytes allocated for each backtrace. These are then\n"
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" displayed in descending order of size of leak\n"
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" The first line of each backtrace output shows the size of the leak in\n"
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" bytes, followed by the (last-first) difference in parentheses.\n"
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" Leaks of size 0 are not shown.\n"
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"\n"
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" 2) DHCMP [-d] dh_dump.txt\n"
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" For each allocation backtrace, the number of bytes allocated will be\n"
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" attributed to each callsite (each line of the backtrace). The number\n"
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" of bytes allocated per callsite are summed and the callsites are then\n"
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" displayed in descending order of bytes allocated. This is useful for\n"
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" finding a leak that is reached via many different codepaths.\n"
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" ntdll!RtlAllocateHeap@12 will appear first when analyzing DH dumps of\n"
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" csrss.exe, since all allocation will have gone through that routine.\n"
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" Similarly, ProcessApiRequest will be very prominent too, since that\n"
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" appears in most allocation backtraces. Hence the useful thing to do\n"
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" with mode 2 output is to use dhcmp to comapre two of them:\n"
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" dhcmp dh_dump1.txt > tmp1.txt\n"
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" dhcmp dh_dump2.txt > tmp2.txt\n"
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" dhcmp tmp1.txt tmp2.txt\n"
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" the output will show the differences.\n"
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"\n"
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" Flags:\n"
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" -d Output in decimal (default is hexadecimal)\n"
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// " -t Find Totals (NOT YET IMPLEMENTED)\n"
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" -v Verbose output: include the actual backtraces as well as summary information\n"
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" (Verbose output is only interesting in mode 1 above.)\n"
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" -? This help\n";
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define NHASH 47
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#define TRUE 1
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#define FALSE 0
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typedef int BOOL;
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#define TYPE_WHOLESTACK 0
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#define TYPE_FUNCTIONS 1
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#define MAXLINELENGTH 4096
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#define MAXFUNCNAMELENGTH 1024
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#define MAX_BT 48 /* max length of back trace stack */
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#define SAFEFREE(p) { if(NULL!=p) free(p); p=NULL; }
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void AddToName(char *fnname, unsigned __int64 nb, int sign);
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void SetAllocs(char *fnname, unsigned __int64 nb, int sign);
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void Process(char *fnam, int sign, int type);
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void SortAll();
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void AddToStackTrace(char *fnname, char *line);
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void ResetStackTrace(char *fnname);
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/*
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* Hashing
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*/
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int MakeHash(char *pName);
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void InitHashTab();
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#define DUMPF_FIRST (1)
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#define DUMPF_SECOND (2)
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#define DUMPF_RESULT (4)
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#define DUMPF_ALL (DUMPF_FIRST | DUMPF_SECOND | DUMPF_RESULT)
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void DumpNodes(int Flags);
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#define F_DECIMAL 0x0001
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#define F_TOTAL 0x0002
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#define F_VERBOSE 0x0004
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//
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// Globals
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//
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int gFlags = 0;
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BOOL DHCMP(ULONG argc, PCHAR * argv) {
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int n, DumpType;
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InitHashTab();
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for (n = 1; n < (int)argc; n++) {
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if ((argv[n][0] == '-') || (argv[n][0] == '/')) {
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/*
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* Flags
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*/
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switch (argv[n][1]) {
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case 'd':
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gFlags |= F_DECIMAL;
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break;
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//NOT YET IMPLEMENTED
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//case 't':
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// gFlags |= F_TOTAL;
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// break;
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case 'v':
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gFlags |= F_VERBOSE;
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break;
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case '?':
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default:
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return FALSE;
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}
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} else {
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/*
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* No more flags
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*/
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break;
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}
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}
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if ((argc - n) == 2) {
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DumpType = DUMPF_ALL;
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Process(argv[n], -1, TYPE_WHOLESTACK);
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Process(argv[n+1], +1, TYPE_WHOLESTACK);
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} else if ((argc - n) == 1) {
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//
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// F_VERBOSE is not meaningful when groveling only one dump.
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//
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gFlags &= ~F_VERBOSE;
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DumpType = DUMPF_RESULT;
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Process(argv[n], +1, TYPE_FUNCTIONS);
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} else {
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return FALSE;
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}
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// printf("==================== BEFORE SORTING ====================\n");
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// DumpNodes(DUMPF_ALL);
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SortAll();
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// printf("==================== AFTER SORTING ====================\n");
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DumpNodes(DumpType);
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return TRUE;
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}
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void Process(char *fname, int sign, int type) {
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FILE *stream = NULL;
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char *linebuff = NULL;
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char *fnnamebuff = NULL;
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char *BackTraceBuff = NULL;
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char *p;
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int lineno = 0;
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BOOL skip = TRUE; // start out skipping lines
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int iT;
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unsigned __int64 ulT = 0L;
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unsigned __int64 nBytes = 0L;
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unsigned __int64 ulConsumed;
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unsigned __int64 lAllocs;
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//
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// Allocate memory from the heap (previously this was allocated
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// from the stack)
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//
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linebuff = (char *)calloc(MAXLINELENGTH, sizeof(char));
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fnnamebuff = (char *)calloc(MAXFUNCNAMELENGTH, sizeof(char));
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BackTraceBuff = (char *)calloc(MAXFUNCNAMELENGTH * MAX_BT, sizeof(char));
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if (NULL == linebuff || NULL == fnnamebuff || NULL == BackTraceBuff) {
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fprintf(stderr, "Failed to allocate memory\n");
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goto Exit;
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}
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// printf("PROCESS %s %d %d\n", fname, sign, type);
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stream = fopen(fname, "r");
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if (stream == NULL) {
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fprintf(stderr, "Can't open %s for reading\n", fname);
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exit (2);
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}
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nBytes = 0;
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while (fgets(linebuff, MAXLINELENGTH, stream) != NULL) {
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lineno++;
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//fprintf(stderr, "Line #%d\r", lineno);
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if (linebuff[0] == '*') {
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//
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// If we find a "hogs" line, stack traces follow, any other line
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// started by "*" should cause us to go back to searching for a
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// hogs block.
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//
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if (strstr(linebuff,
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"Hogs")) {
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skip = FALSE;
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} else {
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skip = TRUE;
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}
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continue;
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}
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if (skip) {
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//
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// Skip is enabled, skip this line, it is data about the heap
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// between 'heap information' and 'heap hogs' lines.
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//
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continue;
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}
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if (linebuff[0] != ' ' && NULL != strstr(linebuff, "bytes"))
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{
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//
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// Scan for byte count and find out how many characters have
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// been consumed by this action.
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//
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ulConsumed = 0;
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iT = sscanf(linebuff, "%I64x bytes in %I64x", &ulT, &lAllocs);
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if (iT > 0)
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{
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nBytes = ulT;
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p = strstr(linebuff, "BackTrace");
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if (!p)
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{
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//
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// What's this ?
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//
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continue;
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}
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strcpy(BackTraceBuff, p);
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p = strchr(BackTraceBuff, '\n');
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if (p)
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{
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*p = '\0';
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}
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if (type == TYPE_FUNCTIONS)
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{
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//
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// BackTraceBuff is now saved for use with the rest of the
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// trace.
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//
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continue;
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}
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AddToName(BackTraceBuff, nBytes, sign);
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if(iT == 1)
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{
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lAllocs = 1;
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}
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SetAllocs(BackTraceBuff, lAllocs, sign);
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ResetStackTrace(BackTraceBuff);
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}
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}
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else if (nBytes != 0)
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{
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/*
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* If TYPE_WHOLESTACK, then add the count to each line of the
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* stack backtrace.
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*/
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if (sscanf(linebuff, " %[^+]+0x", fnnamebuff) == 1) {
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if (type == TYPE_FUNCTIONS) {
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AddToName(fnnamebuff, nBytes, sign);
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}
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if ((gFlags & F_VERBOSE) == F_VERBOSE) {
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AddToStackTrace(BackTraceBuff, linebuff);
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}
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continue;
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} else {
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nBytes = 0;
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}
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}
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}
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/*
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* make sure to account for the final one.
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*/
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if (type == TYPE_WHOLESTACK) {
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AddToName(BackTraceBuff, nBytes, sign);
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}
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Exit:
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if (NULL != fname || NULL != stream) {
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fclose(stream);
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}
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SAFEFREE(linebuff);
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SAFEFREE(fnnamebuff);
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SAFEFREE(BackTraceBuff);
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}
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/*
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* Hashing
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*/
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typedef struct tagNODE {
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char *pName;
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__int64 lValue;
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__int64 lFirst;
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__int64 lSecond;
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char BackTrace[MAX_BT][MAXFUNCNAMELENGTH];
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long lPosition;
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__int64 lAllocsFirst;
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__int64 lAllocsSecond;
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struct tagNODE *pNext;
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} NODE, *PNODE;
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VOID
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DumpStackTrace (
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PNODE pNode
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);
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VOID
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DumpLogDescription (
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VOID
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);
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PNODE HashTab[NHASH];
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void InitHashTab() {
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int i;
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for (i = 0; i < NHASH; i++) {
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HashTab[i] = NULL;
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}
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}
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int MakeHash(char *pName) {
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int hash = 0;
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while (*pName) {
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hash += *pName;
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pName++;
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}
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return hash % NHASH;
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}
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void DumpNodes(int Flags) {
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PNODE pNode;
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int i;
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unsigned __int64 ulTotal = 0;
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char *fmt1;
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char *fmt2;
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char *fmt3;
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char *fmt4;
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char *fmt5;
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char *fmt6;
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char *fmt7;
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DumpLogDescription ();
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if ((gFlags & F_VERBOSE) == F_VERBOSE) {
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if (gFlags & F_DECIMAL) {
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fmt1 = "% 8I64d %s\n";
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fmt2 = "% 8I64d bytes by: %s\n";
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fmt3 = "+% 8I64d ( %6I64d - %6I64d) %6I64d allocs\t%s\n";
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fmt4 = "-% 8I64d ( %6I64d - %6I64d) %6I64d allocs\t%s\n";
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fmt5 = "\nTotal increase == %I64d\n";
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fmt6 = "+% 8I64d ( %6I64d - %6I64d)\t%s\tallocations\n";
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fmt7 = "-% 8I64d ( %6I64d - %6I64d)\t%s\tallocations\n";
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} else {
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fmt1 = "%08I64x %s\n";
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fmt2 = "%08I64x bytes by: %s\n";
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fmt3 = "+% 8I64x ( %5I64x - %5I64x) %6I64x allocs\t%s\n";
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fmt4 = "-% 8I64x ( %5I64x - %5I64x) %6I64x allocs\t%s\n";
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fmt5 = "\nTotal increase == %I64x\n";
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fmt6 = "+% 8I64x ( %5I64x - %5I64x)\t%s\tallocations\n";
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fmt7 = "-% 8I64x ( %5I64x - %5I64x)\t%s\tallocations\n";
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}
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} else {
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if (gFlags & F_DECIMAL) {
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fmt1 = "% 8I64d %s\n";
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fmt2 = "% 8I64d bytes by: %s\n";
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fmt3 = "+% 8I64d ( %6I64d - %6I64d) %6I64d allocs\t%s\n";
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fmt4 = "\n-% 8I64d ( %6I64d - %6I64d) %6I64d allocs\t%s";
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fmt5 = "\nTotal increase == %I64d\n";
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} else {
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fmt1 = "%08I64x %s\n";
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fmt2 = "%08I64x bytes by: %s\n";
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fmt3 = "+% 8I64x ( %5I64x - %5I64x) %6I64x allocs\t%s\n";
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fmt4 = "\n-% 8I64x ( %5I64x - %5I64x) %6I64x allocs\t%s";
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fmt5 = "\nTotal increase == %I64x\n";
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}
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}
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for (i = 0; i < NHASH; i++) {
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// printf("========= HASH %d ==========\n", i);
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for (pNode = HashTab[i]; pNode != NULL; pNode = pNode->pNext) {
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switch (Flags) {
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case DUMPF_FIRST:
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printf(fmt1, pNode->lFirst, pNode->pName);
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break;
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case DUMPF_SECOND:
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printf(fmt1, pNode->lSecond, pNode->pName);
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break;
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case DUMPF_RESULT:
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printf(fmt2, pNode->lValue, pNode->pName);
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break;
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case DUMPF_ALL:
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if (pNode->lValue > 0) {
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printf(fmt3, pNode->lValue,
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pNode->lSecond, pNode->lFirst, (pNode->lAllocsSecond), pNode->pName);
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} else if (pNode->lValue < 0) {
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printf(fmt4, -pNode->lValue,
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pNode->lSecond, pNode->lFirst, (pNode->lAllocsSecond), pNode->pName);
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}
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if((gFlags & F_VERBOSE) == F_VERBOSE) {
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if(pNode->lAllocsSecond-pNode->lAllocsFirst > 0) {
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printf(fmt6, pNode->lAllocsSecond-pNode->lAllocsFirst,
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pNode->lAllocsSecond, pNode->lAllocsFirst, pNode->pName);
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} else if(pNode->lAllocsSecond-pNode->lAllocsFirst < 0) {
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printf(fmt7, -(pNode->lAllocsSecond-pNode->lAllocsFirst),
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pNode->lAllocsSecond, pNode->lAllocsFirst, pNode->pName);
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}
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}
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break;
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}
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ulTotal += pNode->lValue;
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if(((gFlags & F_VERBOSE) == F_VERBOSE) && (pNode->lValue != 0)) {
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DumpStackTrace(pNode);
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}
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}
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}
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if (Flags == DUMPF_ALL) {
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printf(fmt5, ulTotal);
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}
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}
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PNODE FindNode(char *pName) {
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int i;
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PNODE pNode;
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i = MakeHash(pName);
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pNode = HashTab[i];
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while (pNode) {
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if (strcmp(pName, pNode->pName) == 0) {
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return pNode;
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}
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pNode = pNode->pNext;
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}
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// Not found
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// fprintf(stderr, "NEW %s\n", pName);
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pNode = malloc(sizeof(NODE));
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if (!pNode) {
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fprintf(stderr, "malloc failed in FindNode\n");
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exit(2);
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}
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pNode->pName = _strdup(pName);
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if (!pNode->pName) {
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fprintf(stderr, "strdup failed in FindNode\n");
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exit(2);
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}
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pNode->pNext = HashTab[i];
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HashTab[i] = pNode;
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pNode->lValue = 0L;
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pNode->lFirst = 0L;
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pNode->lSecond = 0L;
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pNode->lPosition = 0L;
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pNode->lAllocsFirst = 0L;
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pNode->lAllocsSecond = 0L;
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return pNode;
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}
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void AddToName(char *fnname, unsigned __int64 nb, int sign) {
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PNODE pNode;
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// fprintf(stderr, "%s += %lx\n", fnname, nb);
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pNode = FindNode(fnname);
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pNode->lValue += nb * sign;
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if (sign == -1) {
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pNode->lFirst += nb;
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} else {
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pNode->lSecond += nb;
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}
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// fprintf(stderr, "%s == %lx\n", fnname, pNode->lValue);
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}
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|
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void SetAllocs(char *fnname, unsigned __int64 nb, int sign) {
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|
PNODE pNode;
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|
|
// fprintf(stderr, "%s += %lx\n", fnname, nb);
|
|
pNode = FindNode(fnname);
|
|
|
|
if (sign == -1) {
|
|
pNode->lAllocsFirst = nb;
|
|
} else {
|
|
pNode->lAllocsSecond = nb;
|
|
}
|
|
// fprintf(stderr, "%s == %lx\n", fnname, pNode->lValue);
|
|
}
|
|
|
|
void ResetStackTrace(char *fnname) {
|
|
PNODE pNode;
|
|
|
|
pNode = FindNode(fnname);
|
|
pNode->lPosition = 0L;
|
|
}
|
|
|
|
void AddToStackTrace(char *fnname, char *line)
|
|
{
|
|
PNODE pNode;
|
|
|
|
pNode = FindNode(fnname);
|
|
|
|
//
|
|
// Make sure we don't write too much data in the BackTrace field.
|
|
//
|
|
|
|
if (pNode -> lPosition >= MAX_BT) {
|
|
//
|
|
// MAX_BT should be the number of entries in a stack trace that
|
|
// DH/UMDH captures. If we trigger this we have tried to attach
|
|
// more than MAX_BT entries in this stack.
|
|
//
|
|
|
|
fprintf(stderr,
|
|
"More than %d entries in this stack trace, "
|
|
"did the max change ?\n",
|
|
MAX_BT);
|
|
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
strcpy(pNode->BackTrace[pNode->lPosition++], line);
|
|
}
|
|
|
|
/*
|
|
* Insert pNode into the list at ppNodeHead.
|
|
* Sort in ascending order.
|
|
* Insert pNode BEFORE the first item >= pNode.
|
|
*/
|
|
void Reinsert(PNODE pNode, PNODE *ppNodeHead) {
|
|
PNODE *ppT;
|
|
ppT = ppNodeHead;
|
|
while (*ppT && (pNode->lValue < (*ppT)->lValue)) {
|
|
ppT = &((*ppT)->pNext);
|
|
}
|
|
/*
|
|
* Insert pNode before *ppT
|
|
*/
|
|
pNode->pNext = *ppT;
|
|
*ppT = pNode;
|
|
}
|
|
|
|
void SortList(PNODE *ppNodeHead) {
|
|
PNODE pNode;
|
|
PNODE pNext;
|
|
|
|
pNode = *ppNodeHead;
|
|
if (pNode == NULL) {
|
|
return;
|
|
}
|
|
pNext = pNode->pNext;
|
|
if (pNext == NULL) {
|
|
return;
|
|
}
|
|
|
|
while (TRUE) {
|
|
while (pNext != NULL) {
|
|
if (pNode->lValue < pNext->lValue) {
|
|
|
|
/*
|
|
* cut the unordered node from the list
|
|
*/
|
|
pNode->pNext = pNext->pNext;
|
|
Reinsert(pNext, ppNodeHead);
|
|
break;
|
|
}
|
|
pNode = pNext;
|
|
pNext = pNode->pNext;
|
|
}
|
|
if (pNext == NULL) {
|
|
return;
|
|
}
|
|
pNode = *ppNodeHead;
|
|
pNext = pNode->pNext;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Merge ordered list 1 into ordered list 2
|
|
* Leaves list 1 empty; list 2 ordered
|
|
*/
|
|
void MergeLists(PNODE *ppNode1, PNODE *ppNode2) {
|
|
PNODE *pp1;
|
|
PNODE *pp2;
|
|
PNODE p1;
|
|
PNODE p2;
|
|
|
|
pp1 = ppNode1;
|
|
pp2 = ppNode2;
|
|
while (TRUE) {
|
|
p1 = *pp1;
|
|
p2 = *pp2;
|
|
|
|
if (p1 == NULL) {
|
|
return;
|
|
}
|
|
if (p2 == NULL) {
|
|
*pp2 = *pp1;
|
|
*pp1 = NULL;
|
|
return;
|
|
}
|
|
|
|
if (p1->lValue > p2->lValue) {
|
|
*pp1 = p1->pNext;
|
|
p1->pNext = p2;
|
|
*pp2 = p1;
|
|
pp2 = &(p1->pNext);
|
|
} else {
|
|
pp2 = &(p2->pNext);
|
|
}
|
|
}
|
|
}
|
|
|
|
void SortAll() {
|
|
int i;
|
|
|
|
for (i = 0; i < NHASH; i++) {
|
|
SortList(&HashTab[i]);
|
|
}
|
|
// printf(" ======================== SORTED ========================\n");
|
|
// DumpNodes(DUMPF_ALL);
|
|
for (i = 0; i < NHASH-1; i++) {
|
|
// printf(" ======================== MERGING %d and %d ======================== \n", i, i+1);
|
|
MergeLists(&HashTab[i], &HashTab[i+1]);
|
|
// DumpNodes(DUMPF_ALL);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
DumpStackTrace (
|
|
PNODE pNode
|
|
)
|
|
{
|
|
int n;
|
|
|
|
printf ("\n");
|
|
|
|
for (n = 0; n < pNode->lPosition; n += 1) {
|
|
|
|
printf ("%s", pNode->BackTrace[n]);
|
|
}
|
|
|
|
printf ("\n");
|
|
}
|
|
|
|
CHAR LogDescription [] =
|
|
"// \n"
|
|
"// Each log entry has the following syntax: \n"
|
|
"// \n"
|
|
"// + BYTES_DELTA (NEW_BYTES - OLD_BYTES) NEW_COUNT allocs BackTrace TRACEID \n"
|
|
"// + COUNT_DELTA (NEW_COUNT - OLD_COUNT) BackTrace TRACEID allocations \n"
|
|
"// ... stack trace ... \n"
|
|
"// \n"
|
|
"// where: \n"
|
|
"// \n"
|
|
"// BYTES_DELTA - increase in bytes between before and after log \n"
|
|
"// NEW_BYTES - bytes in after log \n"
|
|
"// OLD_BYTES - bytes in before log \n"
|
|
"// COUNT_DELTA - increase in allocations between before and after log \n"
|
|
"// NEW_COUNT - number of allocations in after log \n"
|
|
"// OLD_COUNT - number of allocations in before log \n"
|
|
"// TRACEID - decimal index of the stack trace in the trace database \n"
|
|
"// (can be used to search for allocation instances in the original \n"
|
|
"// UMDH logs). \n"
|
|
"// \n\n";
|
|
|
|
VOID
|
|
DumpLogDescription (
|
|
VOID
|
|
)
|
|
{
|
|
fputs (LogDescription, stdout);
|
|
}
|
|
|