Deep-Memory-Profiler (DMP) implementation

third_party/tcmalloc/chromium/src/pprof

 #! /usr/bin/env perl
 
 # Copyright (c) 1998-2007, Google Inc.
 # All rights reserved.
 # 
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 # 
 #     * Redistributions of source code must retain the above copyright
@@ skipping 54 matching lines @@
 #   Generates disassembly listing of all routines with at least one
 #   sample that match the --disasm=<regexp> pattern.  The listing is
 #   annotated with the flat and cumulative sample counts at each PC value.
 #
 # TODO: Use color to indicate files?
 
 use strict;
 use warnings;
 use Getopt::Long;
 
-my $PPROF_VERSION = "1.7";
+my $PPROF_VERSION = "1.8.2";
 
 # These are the object tools we use which can come from a
 # user-specified location using --tools, from the PPROF_TOOLS
 # environment variable, or from the environment.
 my %obj_tool_map = (
   "objdump" => "objdump",
   "nm" => "nm",
   "addr2line" => "addr2line",
   "c++filt" => "c++filt",
   ## ConfigureObjTools may add architecture-specific entries:
@@ skipping 63 matching lines @@
 pprof [options] <profile>
    <profile> is a remote form.  Symbols are obtained from host:port$SYMBOL_PAGE
 
    Each name can be:
    /path/to/profile        - a path to a profile file
    host:port[/<service>]   - a location of a service to get profile from
 
    The /<service> can be $HEAP_PAGE, $PROFILE_PAGE, /pprof/pmuprofile,
                          $GROWTH_PAGE, $CONTENTION_PAGE, /pprof/wall,
                          $CENSUSPROFILE_PAGE, or /pprof/filteredprofile.
-   For instance: "pprof http://myserver.com:80$HEAP_PAGE".
+   For instance:
+     pprof http://myserver.com:80$HEAP_PAGE
    If /<service> is omitted, the service defaults to $PROFILE_PAGE (cpu profiling).
 pprof --symbols <program>
    Maps addresses to symbol names.  In this mode, stdin should be a
    list of library mappings, in the same format as is found in the heap-
    and cpu-profile files (this loosely matches that of /proc/self/maps
    on linux), followed by a list of hex addresses to map, one per line.
 
    For more help with querying remote servers, including how to add the
    necessary server-side support code, see this filename (or one like it):
 
@@ skipping 368 matching lines @@
   if ($main::use_symbol_page) {
     unless (IsProfileURL($main::pfile_args[0])) {
       error("The first profile should be a remote form to use $SYMBOL_PAGE\n");
     }
     CheckSymbolPage();
     $main::prog = FetchProgramName();
   } elsif (!$main::use_symbolized_profile) {  # may not need objtools!
     ConfigureObjTools($main::prog)
   }
 
-  # Break the opt_list_prefix into the prefix_list array
+  # Break the opt_lib_prefix into the prefix_list array
   @prefix_list = split (',', $main::opt_lib_prefix);
 
   # Remove trailing / from the prefixes, in the list to prevent
   # searching things like /my/path//lib/mylib.so
   foreach (@prefix_list) {
     s|/+$||;
   }
 }
 
 sub Main() {
@@ skipping 77 matching lines @@
 
   # Get derived profiles
   my $flat = FlatProfile($reduced);
   my $cumulative = CumulativeProfile($reduced);
 
   # Print
   if (!$main::opt_interactive) {
     if ($main::opt_disasm) {
       PrintDisassembly($libs, $flat, $cumulative, $main::opt_disasm);
     } elsif ($main::opt_list) {
-      PrintListing($libs, $flat, $cumulative, $main::opt_list);
+      PrintListing($total, $libs, $flat, $cumulative, $main::opt_list, 0);
     } elsif ($main::opt_text) {
       # Make sure the output is empty when have nothing to report
       # (only matters when --heapcheck is given but we must be
       # compatible with old branches that did not pass --heapcheck always):
       if ($total != 0) {
         printf("Total: %s %s\n", Unparse($total), Units());
       }
       PrintText($symbols, $flat, $cumulative, -1);
     } elsif ($main::opt_raw) {
       PrintSymbolizedProfile($symbols, $profile, $main::prog);
@@ skipping 175 matching lines @@
 
   if (m/^\s*(text|top)(\d*)\s*(.*)/) {
     $main::opt_text = 1;
 
     my $line_limit = ($2 ne "") ? int($2) : 10;
 
     my $routine;
     my $ignore;
     ($routine, $ignore) = ParseInteractiveArgs($3);
 
-    my $profile = ProcessProfile($orig_profile, $symbols, "", $ignore);
+    my $profile = ProcessProfile($total, $orig_profile, $symbols, "", $ignore);
     my $reduced = ReduceProfile($symbols, $profile);
 
     # Get derived profiles
     my $flat = FlatProfile($reduced);
     my $cumulative = CumulativeProfile($reduced);
 
     PrintText($symbols, $flat, $cumulative, $line_limit);
     return 1;
   }
   if (m/^\s*callgrind\s*([^ \n]*)/) {
     $main::opt_callgrind = 1;
 
     # Get derived profiles
     my $calls = ExtractCalls($symbols, $orig_profile);
     my $filename = $1;
     if ( $1 eq '' ) {
       $filename = TempName($main::next_tmpfile, "callgrind");
     }
     PrintCallgrind($calls, $filename);
     if ( $1 eq '' ) {
       RunKcachegrind($filename, " & ");
       $main::next_tmpfile++;
     }
 
     return 1;
   }
-  if (m/^\s*list\s*(.+)/) {
+  if (m/^\s*(web)?list\s*(.+)/) {
+    my $html = (defined($1) && ($1 eq "web"));
     $main::opt_list = 1;
 
     my $routine;
     my $ignore;
-    ($routine, $ignore) = ParseInteractiveArgs($1);
+    ($routine, $ignore) = ParseInteractiveArgs($2);
 
-    my $profile = ProcessProfile($orig_profile, $symbols, "", $ignore);
+    my $profile = ProcessProfile($total, $orig_profile, $symbols, "", $ignore);
     my $reduced = ReduceProfile($symbols, $profile);
 
     # Get derived profiles
     my $flat = FlatProfile($reduced);
     my $cumulative = CumulativeProfile($reduced);
 
-    PrintListing($libs, $flat, $cumulative, $routine);
+    PrintListing($total, $libs, $flat, $cumulative, $routine, $html);
     return 1;
   }
   if (m/^\s*disasm\s*(.+)/) {
     $main::opt_disasm = 1;
 
     my $routine;
     my $ignore;
     ($routine, $ignore) = ParseInteractiveArgs($1);
 
     # Process current profile to account for various settings
-    my $profile = ProcessProfile($orig_profile, $symbols, "", $ignore);
+    my $profile = ProcessProfile($total, $orig_profile, $symbols, "", $ignore);
     my $reduced = ReduceProfile($symbols, $profile);
 
     # Get derived profiles
     my $flat = FlatProfile($reduced);
     my $cumulative = CumulativeProfile($reduced);
 
     PrintDisassembly($libs, $flat, $cumulative, $routine);
     return 1;
   }
   if (m/^\s*(gv|web|evince)\s*(.*)/) {
     $main::opt_gv = 0;
     $main::opt_evince = 0;
     $main::opt_web = 0;
     if ($1 eq "gv") {
       $main::opt_gv = 1;
     } elsif ($1 eq "evince") {
       $main::opt_evince = 1;
     } elsif ($1 eq "web") {
       $main::opt_web = 1;
     }
 
     my $focus;
     my $ignore;
     ($focus, $ignore) = ParseInteractiveArgs($2);
 
     # Process current profile to account for various settings
-    my $profile = ProcessProfile($orig_profile, $symbols, $focus, $ignore);
+    my $profile = ProcessProfile($total, $orig_profile, $symbols,
+                                 $focus, $ignore);
     my $reduced = ReduceProfile($symbols, $profile);
 
     # Get derived profiles
     my $flat = FlatProfile($reduced);
     my $cumulative = CumulativeProfile($reduced);
 
     if (PrintDot($main::prog, $symbols, $profile, $flat, $cumulative, $total)) {
       if ($main::opt_gv) {
         RunGV(TempName($main::next_tmpfile, "ps"), " &");
       } elsif ($main::opt_evince) {
         RunEvince(TempName($main::next_tmpfile, "pdf"), " &");
       } elsif ($main::opt_web) {
         RunWeb(TempName($main::next_tmpfile, "svg"));
       }
       $main::next_tmpfile++;
     }
     return 1;
   }
   if (m/^\s*$/) {
     return 1;
   }
   print STDERR "Unknown command: try 'help'.\n";
   return 1;
 }
 
 
 sub ProcessProfile {
+  my $total_count = shift;
   my $orig_profile = shift;
   my $symbols = shift;
   my $focus = shift;
   my $ignore = shift;
 
   # Process current profile to account for various settings
   my $profile = $orig_profile;
-  my $total_count = TotalProfile($profile);
   printf("Total: %s %s\n", Unparse($total_count), Units());
   if ($focus ne '') {
     $profile = FocusProfile($symbols, $profile, $focus);
     my $focus_count = TotalProfile($profile);
     printf("After focusing on '%s': %s %s of %s (%0.1f%%)\n",
            $focus,
            Unparse($focus_count), Units(),
            Unparse($total_count), ($focus_count*100.0) / $total_count);
   }
   if ($ignore ne '') {
@@ skipping 26 matching lines @@
   web [focus] [-ignore1] [-ignore2]
       Like GV, but displays profile in your web browser instead of using
       Ghostview. Works best if your web browser is already running.
       To change the browser that gets used:
       On Linux, set the /etc/alternatives/gnome-www-browser symlink.
       On OS X, change the Finder association for SVG files.
 
   list [routine_regexp] [-ignore1] [-ignore2]
       Show source listing of routines whose names match "routine_regexp"
 
+  weblist [routine_regexp] [-ignore1] [-ignore2]
+     Displays a source listing of routines whose names match "routine_regexp"
+     in a web browser.  You can click on source lines to view the
+     corresponding disassembly.
+
   top [--cum] [-ignore1] [-ignore2]
   top20 [--cum] [-ignore1] [-ignore2]
   top37 [--cum] [-ignore1] [-ignore2]
       Show top lines ordered by flat profile count, or cumulative count
       if --cum is specified.  If a number is present after 'top', the
       top K routines will be shown (defaults to showing the top 10)
 
   disasm [routine_regexp] [-ignore1] [-ignore2]
       Show disassembly of routines whose names match "routine_regexp",
       annotated with sample counts.
@@ skipping 155 matching lines @@
     if ($f != 0 || $c != 0) {
       printf("%8s %6s %6s %8s %6s %s\n",
              Unparse($f),
              Percent($f, $total),
              Percent($running_sum, $total),
              Unparse($c),
              Percent($c, $total),
              $sym);
     }
     $lines++;
-    last if ($line_limit >= 0 && $lines > $line_limit);
+    last if ($line_limit >= 0 && $lines >= $line_limit);
   }
 }
 
 # Print the call graph in a way that's suiteable for callgrind.
 sub PrintCallgrind {
   my $calls = shift;
   my $filename;
   if ($main::opt_interactive) {
     $filename = shift;
     print STDERR "Writing callgrind file to '$filename'.\n"
@@ skipping 126 matching lines @@
     print(($symbols->{$pc}->[0] || "??") . "\n");
   }
 }
 
 
 # For sorting functions by name
 sub ByName {
   return ShortFunctionName($a) cmp ShortFunctionName($b);
 }
 
-# Print source-listing for all all routines that match $main::opt_list
+# Print source-listing for all all routines that match $list_opts
 sub PrintListing {
+  my $total = shift;
   my $libs = shift;
   my $flat = shift;
   my $cumulative = shift;
   my $list_opts = shift;
+  my $html = shift;
 
+  my $output = \*STDOUT;
+  my $fname = "";
+
+  if ($html) {
+    # Arrange to write the output to a temporary file
+    $fname = TempName($main::next_tmpfile, "html");
+    $main::next_tmpfile++;
+    if (!open(TEMP, ">$fname")) {
+      print STDERR "$fname: $!\n";
+      return;
+    }
+    $output = \*TEMP;
+    print $output HtmlListingHeader();
+    printf $output ("<div class=\"legend\">%s<br>Total: %s %s</div>\n",
+                    $main::prog, Unparse($total), Units());
+  }
+
+  my $listed = 0;
   foreach my $lib (@{$libs}) {
     my $symbol_table = GetProcedureBoundaries($lib->[0], $list_opts);
     my $offset = AddressSub($lib->[1], $lib->[3]);
     foreach my $routine (sort ByName keys(%{$symbol_table})) {
       # Print if there are any samples in this routine
       my $start_addr = $symbol_table->{$routine}->[0];
       my $end_addr = $symbol_table->{$routine}->[1];
       my $length = hex(AddressSub($end_addr, $start_addr));
       my $addr = AddressAdd($start_addr, $offset);
       for (my $i = 0; $i < $length; $i++) {
         if (defined($cumulative->{$addr})) {
-          PrintSource($lib->[0], $offset,
-                      $routine, $flat, $cumulative,
-                      $start_addr, $end_addr);
+          $listed += PrintSource(
+            $lib->[0], $offset,
+            $routine, $flat, $cumulative,
+            $start_addr, $end_addr,
+            $html,
+            $output);
           last;
         }
         $addr = AddressInc($addr);
       }
     }
   }
+
+  if ($html) {
+    if ($listed > 0) {
+      print $output HtmlListingFooter();
+      close($output);
+      RunWeb($fname);
+    } else {
+      close($output);
+      unlink($fname);
+    }
+  }
+}
+
+sub HtmlListingHeader {
+  return <<'EOF';
+<DOCTYPE html>
+<html>
+<head>
+<title>Pprof listing</title>
+<style type="text/css">
+body {
+  font-family: sans-serif;
+}
+h1 {
+  font-size: 1.5em;
+  margin-bottom: 4px;
+}
+.legend {
+  font-size: 1.25em;
+}
+.line {
+  color: #aaaaaa;
+}
+.nop {
+  color: #aaaaaa;
+}
+.unimportant {
+  color: #cccccc;
+}
+.disasmloc {
+  color: #000000;
+}
+.deadsrc {
+  cursor: pointer;
+}
+.deadsrc:hover {
+  background-color: #eeeeee;
+}
+.livesrc {
+  color: #0000ff;
+  cursor: pointer;
+}
+.livesrc:hover {
+  background-color: #eeeeee;
+}
+.asm {
+  color: #008800;
+  display: none;
+}
+</style>
+<script type="text/javascript">
+function pprof_toggle_asm(e) {
+  var target;
+  if (!e) e = window.event;
+  if (e.target) target = e.target;
+  else if (e.srcElement) target = e.srcElement;
+
+  if (target) {
+    var asm = target.nextSibling;
+    if (asm && asm.className == "asm") {
+      asm.style.display = (asm.style.display == "block" ? "" : "block");
+      e.preventDefault();
+      return false;
+    }
+  }
+}
+</script>
+</head>
+<body>
+EOF
+}
+
+sub HtmlListingFooter {
+  return <<'EOF';
+</body>
+</html>
+EOF
+}
+
+sub HtmlEscape {
+  my $text = shift;
+  $text =~ s/&/&amp;/g;
+  $text =~ s/</&lt;/g;
+  $text =~ s/>/&gt;/g;
+  return $text;
 }
 
 # Returns the indentation of the line, if it has any non-whitespace
 # characters.  Otherwise, returns -1.
 sub Indentation {
   my $line = shift;
   if (m/^(\s*)\S/) {
     return length($1);
   } else {
     return -1;
   }
 }
 
+# If the symbol table contains inlining info, Disassemble() may tag an
+# instruction with a location inside an inlined function.  But for
+# source listings, we prefer to use the location in the function we
+# are listing.  So use MapToSymbols() to fetch full location
+# information for each instruction and then pick out the first
+# location from a location list (location list contains callers before
+# callees in case of inlining).
+#
+# After this routine has run, each entry in $instructions contains:
+#   [0] start address
+#   [1] filename for function we are listing
+#   [2] line number for function we are listing
+#   [3] disassembly
+#   [4] limit address
+#   [5] most specific filename (may be different from [1] due to inlining)
+#   [6] most specific line number (may be different from [2] due to inlining)
+sub GetTopLevelLineNumbers {
+  my ($lib, $offset, $instructions) = @_;
+  my $pcs = [];
+  for (my $i = 0; $i <= $#{$instructions}; $i++) {
+    push(@{$pcs}, $instructions->[$i]->[0]);
+  }
+  my $symbols = {};
+  MapToSymbols($lib, $offset, $pcs, $symbols);
+  for (my $i = 0; $i <= $#{$instructions}; $i++) {
+    my $e = $instructions->[$i];
+    push(@{$e}, $e->[1]);
+    push(@{$e}, $e->[2]);
+    my $addr = $e->[0];
+    my $sym = $symbols->{$addr};
+    if (defined($sym)) {
+      if ($#{$sym} >= 2 && $sym->[1] =~ m/^(.*):(\d+)$/) {
+        $e->[1] = $1;  # File name
+        $e->[2] = $2;  # Line number
+      }
+    }
+  }
+}
+
 # Print source-listing for one routine
 sub PrintSource {
   my $prog = shift;
   my $offset = shift;
   my $routine = shift;
   my $flat = shift;
   my $cumulative = shift;
   my $start_addr = shift;
   my $end_addr = shift;
+  my $html = shift;
+  my $output = shift;
 
   # Disassemble all instructions (just to get line numbers)
   my @instructions = Disassemble($prog, $offset, $start_addr, $end_addr);
+  GetTopLevelLineNumbers($prog, $offset, \@instructions);
 
   # Hack 1: assume that the first source file encountered in the
   # disassembly contains the routine
   my $filename = undef;
   for (my $i = 0; $i <= $#instructions; $i++) {
     if ($instructions[$i]->[2] >= 0) {
       $filename = $instructions[$i]->[1];
       last;
     }
   }
   if (!defined($filename)) {
     print STDERR "no filename found in $routine\n";
-    return;
+    return 0;
   }
 
   # Hack 2: assume that the largest line number from $filename is the
   # end of the procedure.  This is typically safe since if P1 contains
   # an inlined call to P2, then P2 usually occurs earlier in the
   # source file.  If this does not work, we might have to compute a
   # density profile or just print all regions we find.
   my $lastline = 0;
   for (my $i = 0; $i <= $#instructions; $i++) {
     my $f = $instructions[$i]->[1];
@@ skipping 12 matching lines @@
       last;
     }
   }
 
   # Hack 4: Extend last line forward until its indentation is less than
   # the indentation we saw on $firstline
   my $oldlastline = $lastline;
   {
     if (!open(FILE, "<$filename")) {
       print STDERR "$filename: $!\n";
-      return;
+      return 0;
     }
     my $l = 0;
     my $first_indentation = -1;
     while (<FILE>) {
       s/\r//g;         # turn windows-looking lines into unix-looking lines
       $l++;
       my $indent = Indentation($_);
       if ($l >= $firstline) {
         if ($first_indentation < 0 && $indent >= 0) {
           $first_indentation = $indent;
           last if ($first_indentation == 0);
         }
       }
       if ($l >= $lastline && $indent >= 0) {
         if ($indent >= $first_indentation) {
           $lastline = $l+1;
         } else {
           last;
         }
       }
     }
     close(FILE);
   }
 
   # Assign all samples to the range $firstline,$lastline,
   # Hack 4: If an instruction does not occur in the range, its samples
   # are moved to the next instruction that occurs in the range.
-  my $samples1 = {};
-  my $samples2 = {};
-  my $running1 = 0;     # Unassigned flat counts
-  my $running2 = 0;     # Unassigned cumulative counts
-  my $total1 = 0;       # Total flat counts
-  my $total2 = 0;       # Total cumulative counts
+  my $samples1 = {};        # Map from line number to flat count
+  my $samples2 = {};        # Map from line number to cumulative count
+  my $running1 = 0;         # Unassigned flat counts
+  my $running2 = 0;         # Unassigned cumulative counts
+  my $total1 = 0;           # Total flat counts
+  my $total2 = 0;           # Total cumulative counts
+  my %disasm = ();          # Map from line number to disassembly
+  my $running_disasm = "";  # Unassigned disassembly
+  my $skip_marker = "---\n";
+  if ($html) {
+    $skip_marker = "";
+    for (my $l = $firstline; $l <= $lastline; $l++) {
+      $disasm{$l} = "";
+    }
+  }
+  my $last_dis_filename = '';
+  my $last_dis_linenum = -1;
+  my $last_touched_line = -1;  # To detect gaps in disassembly for a line
   foreach my $e (@instructions) {
     # Add up counts for all address that fall inside this instruction
     my $c1 = 0;
     my $c2 = 0;
     for (my $a = $e->[0]; $a lt $e->[4]; $a = AddressInc($a)) {
       $c1 += GetEntry($flat, $a);
       $c2 += GetEntry($cumulative, $a);
     }
+
+    if ($html) {
+      my $dis = sprintf("      %6s %6s \t\t%8s: %s ",
+                        HtmlPrintNumber($c1),
+                        HtmlPrintNumber($c2),
+                        UnparseAddress($offset, $e->[0]),
+                        CleanDisassembly($e->[3]));
+      
+      # Append the most specific source line associated with this instruction
+      if (length($dis) < 80) { $dis .= (' ' x (80 - length($dis))) };
+      $dis = HtmlEscape($dis);
+      my $f = $e->[5];
+      my $l = $e->[6];
+      if ($f ne $last_dis_filename) {
+        $dis .= sprintf("<span class=disasmloc>%s:%d</span>", 
+                        HtmlEscape(CleanFileName($f)), $l);
+      } elsif ($l ne $last_dis_linenum) {
+        # De-emphasize the unchanged file name portion
+        $dis .= sprintf("<span class=unimportant>%s</span>" .
+                        "<span class=disasmloc>:%d</span>", 
+                        HtmlEscape(CleanFileName($f)), $l);
+      } else {
+        # De-emphasize the entire location
+        $dis .= sprintf("<span class=unimportant>%s:%d</span>", 
+                        HtmlEscape(CleanFileName($f)), $l);
+      }
+      $last_dis_filename = $f;
+      $last_dis_linenum = $l;
+      $running_disasm .= $dis;
+      $running_disasm .= "\n";
+    }
+
     $running1 += $c1;
     $running2 += $c2;
     $total1 += $c1;
     $total2 += $c2;
     my $file = $e->[1];
     my $line = $e->[2];
     if (($file eq $filename) &&
         ($line >= $firstline) &&
         ($line <= $lastline)) {
       # Assign all accumulated samples to this line
       AddEntry($samples1, $line, $running1);
       AddEntry($samples2, $line, $running2);
       $running1 = 0;
       $running2 = 0;
+      if ($html) {
+        if ($line != $last_touched_line && $disasm{$line} ne '') {
+          $disasm{$line} .= "\n";
+        }
+        $disasm{$line} .= $running_disasm;
+        $running_disasm = '';
+        $last_touched_line = $line;
+      }
     }
   }
 
   # Assign any leftover samples to $lastline
   AddEntry($samples1, $lastline, $running1);
   AddEntry($samples2, $lastline, $running2);
+  if ($html) {
+    if ($lastline != $last_touched_line && $disasm{$lastline} ne '') {
+      $disasm{$lastline} .= "\n";
+    }
+    $disasm{$lastline} .= $running_disasm;
+  }
 
-  printf("ROUTINE ====================== %s in %s\n" .
-         "%6s %6s Total %s (flat / cumulative)\n",
-         ShortFunctionName($routine),
-         $filename,
-         Units(),
-         Unparse($total1),
-         Unparse($total2));
+  if ($html) {
+    printf $output (
+      "<h1>%s</h1>%s\n<pre onClick=\"pprof_toggle_asm()\">\n" .
+      "Total:%6s %6s (flat / cumulative %s)\n",
+      HtmlEscape(ShortFunctionName($routine)),
+      HtmlEscape(CleanFileName($filename)),
+      Unparse($total1),
+      Unparse($total2),
+      Units());
+  } else {
+    printf $output (
+      "ROUTINE ====================== %s in %s\n" .
+      "%6s %6s Total %s (flat / cumulative)\n",
+      ShortFunctionName($routine),
+      CleanFileName($filename),
+      Unparse($total1),
+      Unparse($total2),
+      Units());
+  }
   if (!open(FILE, "<$filename")) {
     print STDERR "$filename: $!\n";
-    return;
+    return 0;
   }
   my $l = 0;
   while (<FILE>) {
     s/\r//g;         # turn windows-looking lines into unix-looking lines
     $l++;
     if ($l >= $firstline - 5 &&
         (($l <= $oldlastline + 5) || ($l <= $lastline))) {
       chop;
       my $text = $_;
-      if ($l == $firstline) { printf("---\n"); }
-      printf("%6s %6s %4d: %s\n",
-             UnparseAlt(GetEntry($samples1, $l)),
-             UnparseAlt(GetEntry($samples2, $l)),
-             $l,
-             $text);
-      if ($l == $lastline)  { printf("---\n"); }
+      if ($l == $firstline) { print $output $skip_marker; }
+      my $n1 = GetEntry($samples1, $l);
+      my $n2 = GetEntry($samples2, $l);
+      if ($html) {
+        # Emit a span that has one of the following classes:
+        #    livesrc -- has samples
+        #    deadsrc -- has disassembly, but with no samples
+        #    nop     -- has no matching disasembly
+        # Also emit an optional span containing disassembly.
+        my $dis = $disasm{$l};
+        my $asm = "";
+        if (defined($dis) && $dis ne '') {
+          $asm = "<span class=\"asm\">" . $dis . "</span>";
+        }
+        my $source_class = (($n1 + $n2 > 0) 
+                            ? "livesrc" 
+                            : (($asm ne "") ? "deadsrc" : "nop"));
+        printf $output (
+          "<span class=\"line\">%5d</span> " .
+          "<span class=\"%s\">%6s %6s %s</span>%s\n",
+          $l, $source_class,
+          HtmlPrintNumber($n1),
+          HtmlPrintNumber($n2),
+          HtmlEscape($text),
+          $asm);
+      } else {
+        printf $output(
+          "%6s %6s %4d: %s\n",
+          UnparseAlt($n1),
+          UnparseAlt($n2),
+          $l,
+          $text);
+      }
+      if ($l == $lastline)  { print $output $skip_marker; }
     };
   }
   close(FILE);
+  if ($html) {
+    print $output "</pre>\n";
+  }
+  return 1;
 }
 
 # Return the source line for the specified file/linenumber.
 # Returns undef if not found.
 sub SourceLine {
   my $file = shift;
   my $line = shift;
 
   # Look in cache
   if (!defined($main::source_cache{$file})) {
@@ skipping 122 matching lines @@
       printf("%6s %6s %5d: %s",
              UnparseAlt($flat_sum{$l}),
              UnparseAlt($cum_sum{$l}),
              $l,
              $line);
     }
 
     # Print disassembly
     for (my $x = $first_inst; $x <= $last_inst; $x++) {
       my $e = $instructions[$x];
-      my $address = $e->[0];
-      $address = AddressSub($address, $offset);  # Make relative to section
-      $address =~ s/^0x//;
-      $address =~ s/^0*//;
-
-      # Trim symbols
-      my $d = $e->[3];
-      while ($d =~ s/\([^()%]*\)(\s*const)?//g) { } # Argument types, not (%rax)
-      while ($d =~ s/(\w+)<[^<>]*>/$1/g)  { }       # Remove template arguments
-
       printf("%6s %6s    %8s: %6s\n",
              UnparseAlt($flat_count[$x]),
              UnparseAlt($cum_count[$x]),
-             $address,
-             $d);
+             UnparseAddress($offset, $e->[0]),
+             CleanDisassembly($e->[3]));
     }
   }
 }
 
 # Print DOT graph
 sub PrintDot {
   my $prog = shift;
   my $symbols = shift;
   my $raw = shift;
   my $flat = shift;
@@ skipping 638 matching lines @@
 # Alternate pretty-printed form: 0 maps to "."
 sub UnparseAlt {
   my $num = shift;
   if ($num == 0) {
     return ".";
   } else {
     return Unparse($num);
   }
 }
 
+# Alternate pretty-printed form: 0 maps to ""
+sub HtmlPrintNumber {
+  my $num = shift;
+  if ($num == 0) {
+    return "";
+  } else {
+    return Unparse($num);
+  }
+}
+
 # Return output units
 sub Units {
   if ($main::profile_type eq 'heap' || $main::profile_type eq 'growth') {
     if ($main::opt_inuse_objects || $main::opt_alloc_objects) {
       return "objects";
     } else {
       if ($main::opt_show_bytes) {
         return "B";
       } else {
         return "MB";
@@ skipping 136 matching lines @@
                       '::do_malloc_or_cpp_alloc',
                       'DoSampledAllocation',
                       'simple_alloc::allocate',
                       '__malloc_alloc_template::allocate',
                       '__builtin_delete',
                       '__builtin_new',
                       '__builtin_vec_delete',
                       '__builtin_vec_new',
                       'operator new',
                       'operator new[]',
+                      # The entry to our memory-allocation routines on OS X
+                      'malloc_zone_malloc',
+                      'malloc_zone_calloc',
+                      'malloc_zone_valloc',
+                      'malloc_zone_realloc',
+                      'malloc_zone_memalign',
+                      'malloc_zone_free',
                       # These mark the beginning/end of our custom sections
                       '__start_google_malloc',
                       '__stop_google_malloc',
                       '__start_malloc_hook',
                       '__stop_malloc_hook') {
       $skip{$name} = 1;
       $skip{"_" . $name} = 1;   # Mach (OS X) adds a _ prefix to everything
     }
     # TODO: Remove TCMalloc once everything has been
     # moved into the tcmalloc:: namespace and we have flushed
@@ skipping 1474 matching lines @@
   my $buildvar = "";
   foreach my $l (split("\n", $map)) {
     if ($l =~ m/^\s*build=(.*)$/) {
       $buildvar = $1;
     }
 
     my $start;
     my $finish;
     my $offset;
     my $lib;
-    if ($l =~ /^($h)-($h)\s+..x.\s+($h)\s+\S+:\S+\s+\d+\s+(\S+\.(so|dll|dylib|bundle)((\.\d+)+\w*(\.\d+){0,3})?)$/i) {
+    if ($l =~ /^($h)-($h)\s+..x.\s+($h)\s+\S+:\S+\s+\d+\s+(\S+(\.(so|dll|dylib|bundle)|chrome)((\.\d+)+\w*(\.\d+){0,3})?)$/i) {
       # Full line from /proc/self/maps.  Example:
       #   40000000-40015000 r-xp 00000000 03:01 12845071   /lib/ld-2.3.2.so
       $start = HexExtend($1);
       $finish = HexExtend($2);
       $offset = HexExtend($3);
       $lib = $4;
       $lib =~ s|\\|/|g;     # turn windows-style paths into unix-style paths
     } elsif ($l =~ /^\s*($h)-($h):\s*(\S+\.so(\.\d+)*)/) {
       # Cooked line from DumpAddressMap.  Example:
       #   40000000-40015000: /lib/ld-2.3.2.so
       $start = HexExtend($1);
       $finish = HexExtend($2);
       $offset = $zero_offset;
       $lib = $3;
     } else {
       next;
     }
 
     # Expand "$build" variable if available
     $lib =~ s/\$build\b/$buildvar/g;
-
     $lib = FindLibrary($lib);
 
     # Check for pre-relocated libraries, which use pre-relocated symbol tables
     # and thus require adjusting the offset that we'll use to translate
     # VM addresses into symbol table addresses.
     # Only do this if we're not going to fetch the symbol table from a
     # debugging copy of the library.
     if (!DebuggingLibrary($lib)) {
       my $text = ParseTextSectionHeader($lib);
       if (defined($text)) {
@@ skipping 396 matching lines @@
 }
 
 sub ShortFunctionName {
   my $function = shift;
   while ($function =~ s/\([^()]*\)(\s*const)?//g) { }   # Argument types
   while ($function =~ s/<[^<>]*>//g)  { }    # Remove template arguments
   $function =~ s/^.*\s+(\w+::)/$1/;          # Remove leading type
   return $function;
 }
 
+# Trim overly long symbols found in disassembler output
+sub CleanDisassembly {
+  my $d = shift;
+  while ($d =~ s/\([^()%]*\)(\s*const)?//g) { } # Argument types, not (%rax)
+  while ($d =~ s/(\w+)<[^<>]*>/$1/g)  { }       # Remove template arguments
+  return $d;
+}
+
+# Clean file name for display
+sub CleanFileName {
+  my ($f) = @_;
+  $f =~ s|^/proc/self/cwd/||;
+  $f =~ s|^\./||;
+  return $f;
+}
+
+# Make address relative to section and clean up for display
+sub UnparseAddress {
+  my ($offset, $address) = @_;
+  $address = AddressSub($address, $offset);
+  $address =~ s/^0x//;
+  $address =~ s/^0*//;
+  return $address;
+}
+
 ##### Miscellaneous #####
 
 # Find the right versions of the above object tools to use.  The
 # argument is the program file being analyzed, and should be an ELF
 # 32-bit or ELF 64-bit executable file.  The location of the tools
 # is determined by considering the following options in this order:
 #   1) --tools option, if set
 #   2) PPROF_TOOLS environment variable, if set
 #   3) the environment
 sub ConfigureObjTools {
@@ skipping 472 matching lines @@
   $error_count += AddressAddUnitTest($unit_test_data_8, $unit_test_data_16);
   $error_count += AddressSubUnitTest($unit_test_data_8, $unit_test_data_16);
   $error_count += AddressIncUnitTest($unit_test_data_8, $unit_test_data_16);
   if ($error_count > 0) {
     print STDERR $error_count, " errors: FAILED\n";
   } else {
     print STDERR "PASS\n";
   }
   exit ($error_count);
 }