117 lines
3.0 KiB
Perl
117 lines
3.0 KiB
Perl
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#!/usr/bin/perl
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# Copyright (c) 2012 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# Given a memwatcher logfile, group memory allocations by callstack.
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#
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# Usage:
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#
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# memprof.pl <logfile>
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#
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# logfile -- The memwatcher.logXXXX file to summarize.
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#
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#
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#
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# Sample output:
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#
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# 54,061,617 100.00% AllocationStack::AllocationStack
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# 41,975,368 77.64% malloc
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# 11,886,592 21.99% VirtualAlloc
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# 7,168,000 13.26% v8::internal::OS::Allocate
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# 7,168,000 13.26% v8::internal::MemoryAllocator::AllocateRawMemory
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# 5,976,184 11.05% WebCore::V8Bridge::evaluate
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# 5,767,168 10.67% v8::internal::MemoryAllocator::AllocatePages
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# 5,451,776 10.08% WebCore::V8Proxy::initContextIfNeeded
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# ....
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#
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#
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#
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# ********
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# Note: The output is currently sorted by decreasing size.
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# ********
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#
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sub process_raw($$) {
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my $file = shift;
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my $filter = shift;
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my %leaks = ();
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my %stackframes = ();
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my $blamed = 0;
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my $bytes = 0;
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my $hits = 0;
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open (LOGFILE, "$file") or die("could not open $file");
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while(<LOGFILE>) {
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my $line = $_;
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#print "$line";
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chomp($line);
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if ($line =~ m/([0-9]*) bytes, ([0-9]*) allocs/) {
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# If we didn't find any frames to account this to, log that.
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if ($blamed == 0) {
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$leaks{"UNACCOUNTED"} += $bytes;
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}
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#print "START\n";
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#print("stackframe " . $1 . ", " . $2 . "\n");
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$hits = $2;
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$bytes = $1;
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%stackframes = (); # we have a new frame, clear the list.
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$blamed = 0; # we haven't blamed anyone yet
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}
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elsif ($line =~ m/Total Bytes:[ ]*([0-9]*)/) {
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$total_bytes += $1;
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}
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elsif ($line =~ m/=============/) {
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next;
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}
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elsif ($line =~ m/[ ]*([\-a-zA-Z_\\0-9\.]*) \(([0-9]*)\):[ ]*([<>_a-zA-Z_0-9:]*)/) {
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# print("junk: " . $line . "\n");
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# print("file: $1\n");
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# print("line: $2\n");
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# print("function: $3\n");
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#
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# blame the function
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my $pig = $3;
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# my $pig = $1;
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# only add the memory if this function is not yet on our callstack
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if (!exists $stackframes{$pig}) {
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$leaks{$pig} += $bytes;
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}
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$stackframes{$pig}++;
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$blamed++;
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}
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}
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# now dump our hash table
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my $sum = 0;
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my @keys = sort { $leaks{$b} <=> $leaks{$a} }keys %leaks;
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for ($i=0; $i<@keys; $i++) {
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my $key = @keys[$i];
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printf "%11s\t%3.2f%%\t%s\n", comma_print($leaks{$key}), (100* $leaks{$key} / $total_bytes), $key;
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$sum += $leaks{$key};
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}
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printf("TOTAL: %s\n", comma_print($sum));
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}
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# Insert commas into an integer after each three digits for printing.
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sub comma_print {
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my $num = "$_[0]";
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$num =~ s/(\d{1,3}?)(?=(\d{3})+$)/$1,/g;
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return $num;
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}
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# ----- Main ------------------------------------------------
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# Get the command line argument
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my $filename = shift;
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my $filter = shift;
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# Process the file.
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process_raw($filename, $filter);
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