tools/memory_watcher/scripts/memprof.pl

   1 #!/usr/bin/perl
   2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5 #
   6 # Given a memwatcher logfile, group memory allocations by callstack.
   7 #
   8 # Usage:
   9 #
  10 #   memprof.pl <logfile>
  11 #
  12 #      logfile -- The memwatcher.logXXXX file to summarize.
  13 #
  14 #
  15 #
  16 # Sample output:
  17 #
  18 # 54,061,617        100.00% AllocationStack::AllocationStack
  19 # 41,975,368        77.64%  malloc
  20 # 11,886,592        21.99%  VirtualAlloc
  21 #  7,168,000        13.26%  v8::internal::OS::Allocate
  22 #  7,168,000        13.26%  v8::internal::MemoryAllocator::AllocateRawMemory
  23 #  5,976,184        11.05%  WebCore::V8Bridge::evaluate
  24 #  5,767,168        10.67%  v8::internal::MemoryAllocator::AllocatePages
  25 #  5,451,776        10.08%  WebCore::V8Proxy::initContextIfNeeded
  26 #  ....
  27 #
  28 #
  29 #
  30 # ********
  31 # Note: The output is currently sorted by decreasing size.
  32 # ********
  33 #
  34
  35 sub process_raw($$) {
  36   my $file = shift;
  37   my $filter = shift;
  38
  39   my %leaks = ();
  40   my %stackframes = ();
  41
  42   my $blamed = 0;
  43   my $bytes = 0;
  44   my $hits = 0;
  45   open (LOGFILE, "$file") or die("could not open $file");
  46   while(<LOGFILE>) {
  47     my $line = $_;
  48 #print "$line";
  49     chomp($line);
  50     if ($line =~ m/([0-9]*) bytes, ([0-9]*) items/) {
  51
  52       # If we didn't find any frames to account this to, log that.
  53       if ($blamed == 0) {
  54         $leaks{"UNACCOUNTED"} += $bytes;
  55       }
  56
  57 #print "START\n";
  58       #print("stackframe " . $1 . ", " . $2 . "\n");
  59       $hits = $2;
  60       $bytes = $1;
  61       %stackframes = ();   # we have a new frame, clear the list.
  62       $blamed = 0;         # we haven't blamed anyone yet
  63     }
  64     elsif ($line =~ m/Total Bytes:[ ]*([0-9]*)/) {
  65       $total_bytes += $1;
  66     }
  67     elsif ($line =~ m/=============/) {
  68       next;
  69     }
  70     elsif ($line =~ m/[ ]*([\-a-zA-Z_\\0-9\.]*) \(([0-9]*)\):[ ]*([<>_a-zA-Z_0-9:]*)/) {
  71 #      print("junk: " . $line . "\n");
  72 #    print("file: $1\n");
  73 #    print("line: $2\n");
  74 #    print("function: $3\n");
  75 #
  76
  77       # blame the function
  78       my $pig = $3;
  79 #      my $pig = $1;
  80
  81       # only add the memory if this function is not yet on our callstack
  82       if (!exists $stackframes{$pig}) {
  83         $leaks{$pig} += $bytes;
  84       }
  85
  86       $stackframes{$pig}++;
  87       $blamed++;
  88     }
  89   }
  90
  91   # now dump our hash table
  92   my $sum = 0;
  93   my @keys = sort { $leaks{$b} <=> $leaks{$a}  }keys %leaks;
  94   for ($i=0; $i<@keys; $i++) {
  95     my $key = @keys[$i];
  96     printf "%11s\t%3.2f%%\t%s\n", comma_print($leaks{$key}), (100* $leaks{$key} / $total_bytes), $key;
  97     $sum += $leaks{$key};
  98   }
  99   printf("TOTAL: %s\n", comma_print($sum));
 100 }
 101
 102 # Insert commas into an integer after each three digits for printing.
 103 sub comma_print {
 104     my $num = "$_[0]";
 105     $num =~ s/(\d{1,3}?)(?=(\d{3})+$)/$1,/g;
 106     return $num;
 107 }
 108
 109 # ----- Main ------------------------------------------------
 110
 111 # Get the command line argument
 112 my $filename = shift;
 113 my $filter = shift;
 114
 115 # Process the file.
 116 process_raw($filename, $filter);