The Tor Browser: tools/jprof/leaky.cpp@97036ab72558 (annotated)

tools/jprof/leaky.cpp@97036ab72558 (annotated)

tools/jprof/leaky.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "leaky.h"
 #include "intcnt.h"
 #include <sys/types.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <string.h>
 #ifndef NTO
 #include <getopt.h>
 #endif
 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
 #ifdef NTO
 #include <mem.h>
 #endif
 #ifndef FALSE
 #define FALSE 0
 #endif
 #ifndef TRUE
 #define TRUE 1
 #endif
 static const u_int DefaultBuckets = 10007;	// arbitrary, but prime
 static const u_int MaxBuckets = 1000003;	// arbitrary, but prime
 //----------------------------------------------------------------------
 int main(int argc, char** argv)
 {
   leaky* l = new leaky;
   l->initialize(argc, argv);
   l->outputfd = stdout;
   for (int i = 0; i < l->numLogFiles; i++) {
     if (l->output_dir || l->numLogFiles > 1) {
       char name[2048]; // XXX fix
       if (l->output_dir)
         snprintf(name,sizeof(name),"%s/%s.html",l->output_dir,argv[l->logFileIndex + i]);
       else
         snprintf(name,sizeof(name),"%s.html",argv[l->logFileIndex + i]);
       fprintf(stderr,"opening %s\n",name);
       l->outputfd = fopen(name,"w");
       // if an error we won't process the file
     }
     if (l->outputfd) { // paranoia
       l->open(argv[l->logFileIndex + i]);
       if (l->outputfd != stderr) {
         fclose(l->outputfd);
         l->outputfd = nullptr;
       }
     }
   }
   return 0;
 }
 char *
 htmlify(const char *in)
 {
   const char *p = in;
   char *out, *q;
   int n = 0;
   size_t newlen;
   // Count the number of '<' and '>' in the input.
   while ((p = strpbrk(p, "<>")))
   {
     ++n;
     ++p;
   }
   // Knowing the number of '<' and '>', we can calculate the space
   // needed for the output string.
   newlen = strlen(in) + n * 3 + 1;
   out = new char[newlen];
   // Copy the input to the output, with substitutions.
   p = in;
   q = out;
   do
   {
     if (*p == '<')
     {
       strcpy(q, "&lt;");
       q += 4;
     }
     else if (*p == '>')
     {
       strcpy(q, "&gt;");
       q += 4;
     }
     else
     {
       *q++ = *p;
     }
     p++;
   } while (*p);
   *q = '\0';
   return out;
 }
 leaky::leaky()
 {
   applicationName = nullptr;
   progFile = nullptr;
   quiet = true;
   showAddress = false;
   showThreads = false;
   stackDepth = 100000;
   onlyThread = 0;
   cleo = false;
   mappedLogFile = -1;
   firstLogEntry = lastLogEntry = 0;
   sfd = -1;
   externalSymbols = 0;
   usefulSymbols = 0;
   numExternalSymbols = 0;
   lowestSymbolAddr = 0;
   highestSymbolAddr = 0;
   loadMap = nullptr;
   collect_last  = false;
   collect_start = -1;
   collect_end   = -1;
 }
 leaky::~leaky()
 {
 }
 void leaky::usageError()
 {
   fprintf(stderr, "Usage: %s [-v] [-t] [-e exclude] [-i include] [-s stackdepth] [--last] [--all] [--start n [--end m]] [--cleo] [--output-dir dir] prog log [log2 ...]\n", (char*) applicationName);
   fprintf(stderr,
           "\t-v: verbose\n"
           "\t-t | --threads: split threads\n"
           "\t--only-thread n: only profile thread N\n"
           "\t-i include-id: stack must include specified id\n"
           "\t-e exclude-id: stack must NOT include specified id\n"
           "\t-s stackdepth: Limit depth looked at from captured stack frames\n"
           "\t--last: only profile the last capture section\n"
           "\t--start n [--end m]: profile n to m (or end) capture sections\n"
           "\t--cleo: format output for 'cleopatra' display\n"
           "\t--output-dir dir: write output files to dir\n"
           "\tIf there's one log, output goes to stdout unless --output-dir is set\n"
           "\tIf there are more than one log, output files will be named with .html added\n"
           );
   exit(-1);
 }
 static struct option longopts[] = {
     { "threads", 0, nullptr, 't' },
     { "only-thread", 1, nullptr, 'T' },
     { "last", 0, nullptr, 'l' },
     { "start", 1, nullptr, 'x' },
     { "end", 1, nullptr, 'n' },
     { "cleo",0, nullptr, 'c' },
     { "output-dir", 1, nullptr, 'd' },
     { nullptr, 0, nullptr, 0 },
 };
 void leaky::initialize(int argc, char** argv)
 {
   applicationName = argv[0];
   applicationName = strrchr(applicationName, '/');
   if (!applicationName) {
     applicationName = argv[0];
   } else {
     applicationName++;
   }
   int arg;
   int errflg = 0;
   int longindex = 0;
   onlyThread = 0;
   output_dir = nullptr;
   cleo = false;
   // XXX tons of cruft here left over from tracemalloc
   // XXX The -- options shouldn't need short versions, or they should be documented
   while (((arg = getopt_long(argc, argv, "adEe:gh:i:r:Rs:tT:qvx:ln:",longopts,&longindex)) != -1)) {
     switch (arg) {
       case '?':
       default:
         fprintf(stderr,"error: unknown option %c\n",optopt);
 	errflg++;
 	break;
       case 'a':
 	break;
       case 'A': // not implemented
 	showAddress = true;
 	break;
       case 'c':
         cleo = true;
         break;
       case 'd':
         output_dir = optarg; // reference to an argv pointer
 	break;
       case 'R':
 	break;
       case 'e':
 	exclusions.add(optarg);
 	break;
       case 'g':
 	break;
       case 'r': // not implemented
 	roots.add(optarg);
 	if (!includes.IsEmpty()) {
 	  errflg++;
 	}
 	break;
       case 'i':
 	includes.add(optarg);
 	if (!roots.IsEmpty()) {
 	  errflg++;
 	}
 	break;
       case 'h':
 	break;
       case 's':
 	stackDepth = atoi(optarg);
 	if (stackDepth < 2) {
 	  stackDepth = 2;
 	}
 	break;
       case 'x':
         // --start
         collect_start = atoi(optarg);
 	break;
       case 'n':
         // --end
         collect_end = atoi(optarg);
         break;
       case 'l':
         // --last
         collect_last = true;
         break;
       case 'q':
         break;
       case 'v':
         quiet = !quiet;
         break;
       case 't':
         showThreads = true;
 	break;
       case 'T':
         showThreads = true;
         onlyThread = atoi(optarg);
 	break;
     }
   }
   if (errflg || ((argc - optind) < 2)) {
     usageError();
   }
   progFile = argv[optind++];
   logFileIndex = optind;
   numLogFiles  = argc - optind;
   if (!quiet)
     fprintf(stderr,"numlogfiles = %d\n",numLogFiles);
 }
 static void* mapFile(int fd, u_int flags, off_t* sz)
 {
   struct stat sb;
   if (fstat(fd, &sb) < 0) {
     perror("fstat");
     exit(-1);
   }
   void* base = mmap(0, (int)sb.st_size, flags, MAP_PRIVATE, fd, 0);
   if (!base) {
     perror("mmap");
     exit(-1);
   }
   *sz = sb.st_size;
   return base;
 }
 void leaky::LoadMap()
 {
   malloc_map_entry mme;
   char name[1000];
   if (!loadMap) {
     // all files use the same map
     int fd = ::open(M_MAPFILE, O_RDONLY);
     if (fd < 0) {
       perror("open: " M_MAPFILE);
       exit(-1);
     }
     for (;;) {
       int nb = read(fd, &mme, sizeof(mme));
       if (nb != sizeof(mme)) break;
       nb = read(fd, name, mme.nameLen);
       if (nb != (int)mme.nameLen) break;
       name[mme.nameLen] = 0;
       if (!quiet) {
         fprintf(stderr,"%s @ %lx\n", name, mme.address);
       }
       LoadMapEntry* lme = new LoadMapEntry;
       lme->address = mme.address;
       lme->name = strdup(name);
       lme->next = loadMap;
       loadMap = lme;
     }
     close(fd);
   }
 }
 void leaky::open(char *logFile)
 {
   int threadArray[100]; // should auto-expand
   int last_thread = -1;
   int numThreads = 0;
   int section = -1;
   bool collecting = false;
   LoadMap();
   setupSymbols(progFile);
   // open up the log file
   if (mappedLogFile)
     ::close(mappedLogFile);
   mappedLogFile = ::open(logFile, O_RDONLY);
   if (mappedLogFile < 0) {
     perror("open");
     exit(-1);
   }
   off_t size;
   firstLogEntry = (malloc_log_entry*) mapFile(mappedLogFile, PROT_READ, &size);
   lastLogEntry = (malloc_log_entry*)((char*)firstLogEntry + size);
   if (!collect_last || collect_start < 0) {
     collecting = true;
   }
   // First, restrict it to the capture sections specified (all, last, start/end)
   // This loop walks through all the call stacks we recorded
   for (malloc_log_entry* lep=firstLogEntry;
        lep < lastLogEntry;
        lep = reinterpret_cast<malloc_log_entry*>(&lep->pcs[lep->numpcs])) {
     if (lep->flags & JP_FIRST_AFTER_PAUSE) {
       section++;
       if (collect_last) {
         firstLogEntry = lep;
         numThreads = 0;
         collecting = true;
       }
       if (collect_start == section) {
         collecting = true;
         firstLogEntry = lep;
       }
       if (collect_end == section) {
         collecting = false;
         lastLogEntry = lep;
       }
       if (!quiet)
         fprintf(stderr,"New section %d: first=%p, last=%p, collecting=%d\n",
                 section,(void*)firstLogEntry,(void*)lastLogEntry,collecting);
     }
     // Capture thread info at the same time
     // Find all the threads captured
     // pthread/linux docs say the signal can be delivered to any thread in
     // the process.  In practice, it appears in Linux that it's always
     // delivered to the thread that called setitimer(), and each thread can
     // have a separate itimer.  There's a support library for gprof that
     // overlays pthread_create() to set timers in any threads you spawn.
     if (showThreads && collecting) {
       if (lep->thread != last_thread)
       {
         int i;
         for (i=0; i<numThreads; i++)
         {
           if (lep->thread == threadArray[i])
             break;
         }
         if (i == numThreads &&
             i < (int) (sizeof(threadArray)/sizeof(threadArray[0])))
         {
           threadArray[i] = lep->thread;
           numThreads++;
           if (!quiet)
             fprintf(stderr,"new thread %d\n",lep->thread);
         }
       }
     }
   }
   if (!quiet)
     fprintf(stderr,"Done collecting: sections %d: first=%p, last=%p, numThreads=%d\n",
             section,(void*)firstLogEntry,(void*)lastLogEntry,numThreads);
   if (!cleo) {
     fprintf(outputfd,"<html><head><title>Jprof Profile Report</title></head><body>\n");
     fprintf(outputfd,"<h1><center>Jprof Profile Report</center></h1>\n");
   }
   if (showThreads)
   {
     fprintf(stderr,"Num threads %d\n",numThreads);
     if (!cleo) {
       fprintf(outputfd,"<hr>Threads:<p><pre>\n");
       for (int i=0; i<numThreads; i++)
       {
         fprintf(outputfd,"   <a href=\"#thread_%d\">%d</a>  ",
                 threadArray[i],threadArray[i]);
         if ((i+1)%10 == 0)
           fprintf(outputfd,"<br>\n");
       }
       fprintf(outputfd,"</pre>");
     }
     for (int i=0; i<numThreads; i++)
     {
       if (!onlyThread || onlyThread == threadArray[i])
         analyze(threadArray[i]);
     }
   }
   else
   {
     analyze(0);
   }
   if (!cleo)
     fprintf(outputfd,"</pre></body></html>\n");
 }
 //----------------------------------------------------------------------
 static int symbolOrder(void const* a, void const* b)
 {
   Symbol const** ap = (Symbol const **)a;
   Symbol const** bp = (Symbol const **)b;
   return (*ap)->address == (*bp)->address ? 0 :
     ((*ap)->address > (*bp)->address ? 1 : -1);
 }
 void leaky::ReadSharedLibrarySymbols()
 {
   LoadMapEntry* lme = loadMap;
   while (nullptr != lme) {
     ReadSymbols(lme->name, lme->address);
     lme = lme->next;
   }
 }
 void leaky::setupSymbols(const char *fileName)
 {
   if (usefulSymbols == 0) {
     // only read once!
     // Read in symbols from the program
     ReadSymbols(fileName, 0);
     // Read in symbols from the .so's
     ReadSharedLibrarySymbols();
     if (!quiet) {
       fprintf(stderr,"A total of %d symbols were loaded\n", usefulSymbols);
     }
     // Now sort them
     qsort(externalSymbols, usefulSymbols, sizeof(Symbol *), symbolOrder);
     lowestSymbolAddr = externalSymbols[0]->address;
     highestSymbolAddr = externalSymbols[usefulSymbols-1]->address;
   }
 }
 // Binary search the table, looking for a symbol that covers this
 // address.
 int leaky::findSymbolIndex(u_long addr)
 {
   u_int base = 0;
   u_int limit = usefulSymbols - 1;
   Symbol** end = &externalSymbols[limit];
   while (base <= limit) {
     u_int midPoint = (base + limit)>>1;
     Symbol** sp = &externalSymbols[midPoint];
     if (addr < (*sp)->address) {
       if (midPoint == 0) {
 	return -1;
       }
       limit = midPoint - 1;
     } else {
       if (sp+1 < end) {
 	if (addr < (*(sp+1))->address) {
 	  return midPoint;
 	}
       } else {
 	return midPoint;
       }
       base = midPoint + 1;
     }
   }
   return -1;
 }
 Symbol* leaky::findSymbol(u_long addr)
 {
   int idx = findSymbolIndex(addr);
   if(idx<0) {
     return nullptr;
   } else {
     return externalSymbols[idx];
   }
 }
 //----------------------------------------------------------------------
 bool leaky::excluded(malloc_log_entry* lep)
 {
   if (exclusions.IsEmpty()) {
     return false;
   }
   char** pcp = &lep->pcs[0];
   u_int n = lep->numpcs;
   for (u_int i = 0; i < n; i++, pcp++) {
     Symbol* sp = findSymbol((u_long) *pcp);
     if (sp && exclusions.contains(sp->name)) {
       return true;
     }
   }
   return false;
 }
 bool leaky::included(malloc_log_entry* lep)
 {
   if (includes.IsEmpty()) {
     return true;
   }
   char** pcp = &lep->pcs[0];
   u_int n = lep->numpcs;
   for (u_int i = 0; i < n; i++, pcp++) {
     Symbol* sp = findSymbol((u_long) *pcp);
     if (sp && includes.contains(sp->name)) {
       return true;
     }
   }
   return false;
 }
 //----------------------------------------------------------------------
 void leaky::displayStackTrace(FILE* out, malloc_log_entry* lep)
 {
   char** pcp = &lep->pcs[0];
   u_int n = (lep->numpcs < stackDepth) ? lep->numpcs : stackDepth;
   for (u_int i = 0; i < n; i++, pcp++) {
     u_long addr = (u_long) *pcp;
     Symbol* sp = findSymbol(addr);
     if (sp) {
       fputs(sp->name, out);
       if (showAddress) {
 	fprintf(out, "[%p]", (char*)addr);
       }
     }
     else {
       fprintf(out, "<%p>", (char*)addr);
     }
     fputc(' ', out);
   }
   fputc('\n', out);
 }
 void leaky::dumpEntryToLog(malloc_log_entry* lep)
 {
   printf("%ld\t", lep->delTime);
   printf(" --> ");
   displayStackTrace(outputfd, lep);
 }
 void leaky::generateReportHTML(FILE *fp, int *countArray, int count, int thread)
 {
   fprintf(fp,"<center>");
   if (showThreads)
   {
     fprintf(fp,"<hr><A NAME=thread_%d><b>Thread: %d</b></A><p>",
             thread,thread);
   }
   fprintf(fp,"<A href=#flat_%d>flat</A><b> | </b><A href=#hier_%d>hierarchical</A>",
           thread,thread);
   fprintf(fp,"</center><P><P><P>\n");
   int totalTimerHits = count;
   int *rankingTable = new int[usefulSymbols];
   for(int cnt=usefulSymbols; --cnt>=0; rankingTable[cnt]=cnt);
   // Drat.  I would use ::qsort() but I would need a global variable and my
   // intro-pascal professor threatened to flunk anyone who used globals.
   // She damaged me for life :-) (That was 1986.  See how much influence
   // she had.  I don't remember her name but I always feel guilty about globals)
   // Shell Sort. 581130733 is the max 31 bit value of h = 3h+1
   int mx, i, h;
   for(mx=usefulSymbols/9, h=581130733; h>0; h/=3) {
     if(h<mx) {
       for(i = h-1; i<usefulSymbols; i++) {
         int j, tmp=rankingTable[i], val = countArray[tmp];
 	for(j = i; (j>=h) && (countArray[rankingTable[j-h]]<val); j-=h) {
 	  rankingTable[j] = rankingTable[j-h];
 	}
 	rankingTable[j] = tmp;
       }
     }
   }
   // Ok, We are sorted now.  Let's go through the table until we get to
   // functions that were never called.  Right now we don't do much inside
   // this loop.  Later we can get callers and callees into it like gprof
   // does
   fprintf(fp,
           "<h2><A NAME=hier_%d></A><center><a href=\"http://mxr.mozilla.org/mozilla-central/source/tools/jprof/README.html#hier\">Hierarchical Profile</a></center></h2><hr>\n",
           thread);
   fprintf(fp, "<pre>\n");
   fprintf(fp, "%6s %6s         %4s      %s\n",
           "index", "Count", "Hits", "Function Name");
   for(i=0; i<usefulSymbols && countArray[rankingTable[i]]>0; i++) {
     Symbol **sp=&externalSymbols[rankingTable[i]];
     (*sp)->cntP.printReport(fp, this, rankingTable[i], totalTimerHits);
     char *symname = htmlify((*sp)->name);
     fprintf(fp, "%6d %6d (%3.1f%%)%s <a name=%d>%8d (%3.1f%%)</a>%s <b>%s</b>\n",
             rankingTable[i],
             (*sp)->timerHit, ((*sp)->timerHit*1000/totalTimerHits)/10.0,
             ((*sp)->timerHit*1000/totalTimerHits)/10.0 >= 10.0 ? "" : " ",
             rankingTable[i], countArray[rankingTable[i]],
             (countArray[rankingTable[i]]*1000/totalTimerHits)/10.0,
             (countArray[rankingTable[i]]*1000/totalTimerHits)/10.0 >= 10.0 ? "" : " ",
             symname);
     delete [] symname;
     (*sp)->cntC.printReport(fp, this, rankingTable[i], totalTimerHits);
     fprintf(fp, "<hr>\n");
   }
   fprintf(fp,"</pre>\n");
   // OK, Now we want to print the flat profile.  To do this we resort on
   // the hit count.
   // Cut-N-Paste Shell sort from above.  The Ranking Table has already been
   // populated, so we do not have to reinitialize it.
   for(mx=usefulSymbols/9, h=581130733; h>0; h/=3) {
     if(h<mx) {
       for(i = h-1; i<usefulSymbols; i++) {
 	int j, tmp=rankingTable[i], val = externalSymbols[tmp]->timerHit;
 	for(j = i;
 	  (j>=h) && (externalSymbols[rankingTable[j-h]]->timerHit<val); j-=h) {
 	  rankingTable[j] = rankingTable[j-h];
 	}
 	rankingTable[j] = tmp;
       }
     }
   }
   // Pre-count up total counter hits, to get a percentage.
   // I wanted the total before walking the list, if this
   // double-pass over externalSymbols gets slow we can
   // do single-pass and print this out after the loop finishes.
   totalTimerHits = 0;
   for(i=0;
       i<usefulSymbols && externalSymbols[rankingTable[i]]->timerHit>0; i++) {
     Symbol **sp=&externalSymbols[rankingTable[i]];
     totalTimerHits += (*sp)->timerHit;
   }
   if (totalTimerHits == 0)
     totalTimerHits = 1;
   if (totalTimerHits != count)
     fprintf(stderr,"Hit count mismatch: count=%d; totalTimerHits=%d",
             count,totalTimerHits);
   fprintf(fp,"<h2><A NAME=flat_%d></A><center><a href=\"http://mxr.mozilla.org/mozilla-central/source/tools/jprof/README.html#flat\">Flat Profile</a></center></h2><br>\n",
           thread);
   fprintf(fp, "<pre>\n");
   fprintf(fp, "Total hit count: %d\n", totalTimerHits);
   fprintf(fp, "Count %%Total  Function Name\n");
   // Now loop for as long as we have timer hits
   for(i=0;
       i<usefulSymbols && externalSymbols[rankingTable[i]]->timerHit>0; i++) {
     Symbol **sp=&externalSymbols[rankingTable[i]];
     char *symname = htmlify((*sp)->name);
     fprintf(fp, "<a href=\"#%d\">%3d   %-2.1f     %s</a>\n",
             rankingTable[i], (*sp)->timerHit,
             ((float)(*sp)->timerHit/(float)totalTimerHits)*100.0, symname);
     delete [] symname;
   }
 }
 void leaky::analyze(int thread)
 {
   int *countArray = new int[usefulSymbols];
   int *flagArray  = new int[usefulSymbols];
   //Zero our function call counter
   memset(countArray, 0, sizeof(countArray[0])*usefulSymbols);
   // reset hit counts
   for(int i=0; i<usefulSymbols; i++) {
     externalSymbols[i]->timerHit = 0;
     externalSymbols[i]->regClear();
   }
   // The flag array is used to prevent counting symbols multiple times
   // if functions are called recursively.  In order to keep from having
   // to zero it on each pass through the loop, we mark it with the value
   // of stacks on each trip through the loop.  This means we can determine
   // if we have seen this symbol for this stack trace w/o having to reset
   // from the prior stacktrace.
   memset(flagArray, -1, sizeof(flagArray[0])*usefulSymbols);
   if (cleo)
     fprintf(outputfd,"m-Start\n");
   // This loop walks through all the call stacks we recorded
   // --last, --start and --end can restrict it, as can excludes/includes
   stacks = 0;
   for(malloc_log_entry* lep=firstLogEntry;
     lep < lastLogEntry;
     lep = reinterpret_cast<malloc_log_entry*>(&lep->pcs[lep->numpcs])) {
     if ((thread != 0 && lep->thread != thread) ||
         excluded(lep) || !included(lep))
     {
       continue;
     }
     ++stacks; // How many stack frames did we collect
     u_int n = (lep->numpcs < stackDepth) ? lep->numpcs : stackDepth;
     char** pcp = &lep->pcs[n-1];
     int idx=-1, parrentIdx=-1;  // Init idx incase n==0
     if (cleo) {
       // This loop walks through every symbol in the call stack.  By walking it
       // backwards we know who called the function when we get there.
       char type = 's';
       for (int i=n-1; i>=0; --i, --pcp) {
         idx = findSymbolIndex(reinterpret_cast<u_long>(*pcp));
         if(idx>=0) {
           // Skip over bogus __restore_rt frames that realtime profiling
           // can introduce.
           if (i > 0 && !strcmp(externalSymbols[idx]->name, "__restore_rt")) {
             --pcp;
             --i;
             idx = findSymbolIndex(reinterpret_cast<u_long>(*pcp));
             if (idx < 0) {
               continue;
             }
           }
           Symbol **sp=&externalSymbols[idx];
           char *symname = htmlify((*sp)->name);
           fprintf(outputfd,"%c-%s\n",type,symname);
           delete [] symname;
         }
         // else can't find symbol - ignore
         type = 'c';
       }
     } else {
       // This loop walks through every symbol in the call stack.  By walking it
       // backwards we know who called the function when we get there.
       for (int i=n-1; i>=0; --i, --pcp) {
         idx = findSymbolIndex(reinterpret_cast<u_long>(*pcp));
         if(idx>=0) {
           // Skip over bogus __restore_rt frames that realtime profiling
           // can introduce.
           if (i > 0 && !strcmp(externalSymbols[idx]->name, "__restore_rt")) {
             --pcp;
             --i;
             idx = findSymbolIndex(reinterpret_cast<u_long>(*pcp));
             if (idx < 0) {
               continue;
             }
           }
           // If we have not seen this symbol before count it and mark it as seen
           if(flagArray[idx]!=stacks && ((flagArray[idx]=stacks) || true)) {
             ++countArray[idx];
           }
           // We know who we are and we know who our parrent is.  Count this
           if(parrentIdx>=0) {
             externalSymbols[parrentIdx]->regChild(idx);
             externalSymbols[idx]->regParrent(parrentIdx);
           }
           // inside if() so an unknown in the middle of a stack won't break
           // the link!
           parrentIdx=idx;
         }
       }
       // idx should be the function that we were in when we received the signal.
       if(idx>=0) {
         ++externalSymbols[idx]->timerHit;
       }
     }
   }
   if (!cleo)
     generateReportHTML(outputfd, countArray, stacks, thread);
 }
 void FunctionCount::printReport(FILE *fp, leaky *lk, int parent, int total)
 {
     const char *fmt = "                      <A href=\"#%d\">%8d (%3.1f%%)%s %s</A>%s\n";
     int nmax, tmax=((~0U)>>1);
     do {
 	nmax=0;
 	for(int j=getSize(); --j>=0;) {
 	    int cnt = getCount(j);
 	    if(cnt==tmax) {
 		int idx = getIndex(j);
 		char *symname = htmlify(lk->indexToName(idx));
                 fprintf(fp, fmt, idx, getCount(j),
                         getCount(j)*100.0/total,
                         getCount(j)*100.0/total >= 10.0 ? "" : " ",
                         symname,
                         parent == idx ? " (self)" : "");
 		delete [] symname;
 	    } else if(cnt<tmax && cnt>nmax) {
 	        nmax=cnt;
 	    }
 	}
     } while((tmax=nmax)>0);
 }

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tools/jprof/leaky.cpp@97036ab72558 (annotated)

tools/jprof/leaky.cpp