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220 lines
6.0 KiB
Perl
Executable File
220 lines
6.0 KiB
Perl
Executable File
#!/usr/bin/perl -w
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#
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# Process output of TraceMallocDumpAllocations() to produce a table
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# that attributes memory to the allocators using call stack.
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#
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use 5.004;
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use strict;
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# A table of all ancestors. Key is function name, value is an
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# array of ancestors, each attributed with a number of calls and
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# the amount of memory allocated.
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my %Ancestors;
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# Ibid, for descendants.
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my %Descendants;
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# A table that keeps the total amount of memory allocated by each
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# function
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my %Totals;
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$Totals{".root"} = { "#memory#" => 0, "#calls#" => 0 };
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# A table that maps the long ugly function name to a unique number so
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# that the HTML we generate isn't too fat
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my %Ids;
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my $NextId = 0;
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$Ids{".root"} = ++$NextId;
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LINE: while (<>) {
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# The line'll look like:
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#
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# 0x4000a008 16 PR_Malloc+16; nsMemoryImpl::Alloc(unsigned int)+12; ...
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# Ignore any lines that don't start with an address
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next LINE unless /^0x/;
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# Parse it
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my ($address, $size, $rest) = /^(0x\S*)\s*(\d+)\s*(.*)$/;
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my @stack = reverse(split /; /, $rest);
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# Accumulate at the root
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$Totals{".root"}->{"#memory#"} += $size;
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++$Totals{".root"}->{"#calls#"};
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my $caller = ".root";
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foreach my $callee (@stack) {
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# Strip the offset from the callsite information. I don't
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# think we care.
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$callee =~ s/\+\d+$//g;
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# Accumulate the total for the callee
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if (! $Totals{$callee}) {
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$Totals{$callee} = { "#memory#" => 0, "#calls#" => 0 };
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}
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$Totals{$callee}->{"#memory#"} += $size;
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++$Totals{$callee}->{"#calls#"};
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# Descendants
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my $descendants = $Descendants{$caller};
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if (! $descendants) {
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$descendants = $Descendants{$caller} = [ ];
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}
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# Manage the list of descendants
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{
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my $wasInserted = 0;
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DESCENDANT: foreach my $item (@$descendants) {
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if ($item->{"#name#"} eq $callee) {
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$item->{"#memory#"} += $size;
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++$item->{"#calls#"};
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$wasInserted = 1;
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last DESCENDANT;
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}
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}
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if (! $wasInserted) {
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$descendants->[@$descendants] = {
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"#name#" => $callee,
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"#memory#" => $size,
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"#calls#" => 1
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};
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}
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}
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# Ancestors
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my $ancestors = $Ancestors{$callee};
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if (! $ancestors) {
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$ancestors = $Ancestors{$callee} = [ ];
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}
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# Manage the list of ancestors
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{
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my $wasInserted = 0;
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ANCESTOR: foreach my $item (@$ancestors) {
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if ($item->{"#name#"} eq $caller) {
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$item->{"#memory#"} += $size;
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++$item->{"#calls#"};
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$wasInserted = 1;
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last ANCESTOR;
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}
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}
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if (! $wasInserted) {
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$ancestors->[@$ancestors] = {
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"#name#" => $caller,
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"#memory#" => $size,
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"#calls#" => 1
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};
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}
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}
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# Make a new "id", if necessary
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if (! $Ids{$callee}) {
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$Ids{$callee} = ++$NextId;
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}
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# On to the next one...
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$caller = $callee;
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}
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}
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# Change the manky looking callsite into a pretty function; strip argument
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# types and offset information.
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sub pretty($) {
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$_ = $_[0];
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s/&/&/g;
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s/</</g;
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s/>/>/g;
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if (/([^\(]*)(\(.*\))/) {
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return $1 . "()";
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}
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else {
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return $_[0];
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}
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}
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# Dump a web page!
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print "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\">\n";
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print "<html><head>\n";
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print "<title>Live Bloat Blame</title>\n";
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print "<link rel=\"stylesheet\" type=\"text/css\" href=\"blame.css\">\n";
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print "</head>\n";
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print "<body>\n";
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# At most 100 rows per table so as not to kill the browser.
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my $maxrows = 100;
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print "<table>\n";
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print "<thead><tr><td>Function</td><td>Ancestors</td><td>Descendants</td></tr></thead>\n";
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foreach my $node (sort(keys(%Ids))) {
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print "<tr>\n";
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# Print the current node
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{
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my ($memory, $calls) =
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($Totals{$node}->{"#memory#"},
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$Totals{$node}->{"#calls#"});
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my $pretty = pretty($node);
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print " <td><a name=\"$Ids{$node}\">$pretty $memory ($calls)</a></td>\n";
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}
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# Ancestors, sorted descending by amount of memory allocated
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print " <td>\n";
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my $ancestors = $Ancestors{$node};
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if ($ancestors) {
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foreach my $ancestor (sort { $b->{"#memory#"} <=> $a->{"#memory#"} } @$ancestors) {
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my ($name, $memory, $calls) =
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($ancestor->{"#name#"},
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$ancestor->{"#memory#"},
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$ancestor->{"#calls#"});
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my $pretty = pretty($name);
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print " <a href=\"#$Ids{$name}\">$pretty</a> $memory ($calls)<br>\n";
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}
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}
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print " </td>\n";
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# Descendants, sorted descending by amount of memory allocated
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print " <td>\n";
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my $descendants = $Descendants{$node};
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if ($descendants) {
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foreach my $descendant (sort { $b->{"#memory#"} <=> $a->{"#memory#"} } @$descendants) {
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my ($name, $memory, $calls) =
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($descendant->{"#name#"},
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$descendant->{"#memory#"},
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$descendant->{"#calls#"});
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my $pretty = pretty($name);
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print " <a href=\"#$Ids{$name}\">$pretty</a> $memory ($calls)<br>\n";
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}
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}
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print " </td></tr>\n";
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if (--$maxrows == 0) {
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print "</table>\n";
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print "<table>\n";
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print "<thead><tr><td>Function</td><td>Ancestors</td><td>Descendants</td></tr></thead>\n";
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$maxrows = 100;
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}
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}
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# Footer
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print "</table>\n";
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print "</body></html>\n";
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