mirror of
https://github.com/curl/curl.git
synced 2026-04-11 12:01:42 +08:00
447 lines
13 KiB
Perl
447 lines
13 KiB
Perl
#!/usr/bin/env perl
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#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# SPDX-License-Identifier: curl
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#
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###########################################################################
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#
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# Example input:
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#
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# MEM mprintf.c:1094 malloc(32) = e5718
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# MEM mprintf.c:1103 realloc(e5718, 64) = e6118
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# MEM sendf.c:232 free(f6520)
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package memanalyzer;
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use strict;
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use warnings;
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BEGIN {
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use base qw(Exporter);
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our @EXPORT = qw(
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memanalyze
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);
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}
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my $memsum;
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my $maxmem;
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sub newtotal {
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my ($newtot)=@_;
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# count a max here
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if($newtot > $maxmem) {
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$maxmem = $newtot;
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}
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}
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sub memanalyze {
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my ($file, $verbose, $trace, $showlimit) = @_;
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my @res;
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my $mallocs = 0;
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my $callocs = 0;
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my $reallocs = 0;
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my $strdups = 0;
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my $wcsdups = 0;
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my $sockets = 0;
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$memsum = 0; # the total number of memory allocated over the lifetime
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$maxmem = 0; # the high water mark
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open(my $fileh, "<", $file) or return ();
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if($showlimit) {
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while(<$fileh>) {
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if(/^LIMIT.*memlimit$/) {
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push @res, $_;
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last;
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}
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}
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close($fileh);
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return @res;
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}
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my %sizeataddr;
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my %getmem;
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my $totalmem = 0;
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my $frees = 0;
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my $dup;
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my $size;
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my $addr;
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my %filedes;
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my %getfile;
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my %fopen;
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my %fopenfile;
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my $openfile = 0;
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my $fopens = 0;
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my %addrinfo;
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my %addrinfofile;
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my $addrinfos = 0;
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my $source;
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my $linenum;
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my $function;
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my $lnum = 0;
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while(<$fileh>) {
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chomp $_;
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my $line = $_;
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$lnum++;
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if($line =~ /^BT/) {
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# back-trace, ignore
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}
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elsif($line =~ /^LIMIT ([^ ]*):(\d*) (.*)/) {
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# new memory limit test prefix
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my $i = $3;
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my ($source, $linenum) = ($1, $2);
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if($trace && ($i =~ /([^ ]*) reached memlimit/)) {
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push @res, "LIMIT: $1 returned error at $source:$linenum\n";
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}
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}
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elsif($line =~ /^MEM ([^ ]*):(\d*) (.*)/) {
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# generic match for the filename+linenumber
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$source = $1;
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$linenum = $2;
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$function = $3;
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if($function =~ /free\((\(nil\)|0x([0-9a-f]*))/) {
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$addr = $2;
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if($1 eq "(nil)") {
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; # do nothing when free(NULL)
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}
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elsif(!exists $sizeataddr{$addr}) {
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push @res, "FREE ERROR: No memory allocated: $line\n";
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}
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elsif(-1 == $sizeataddr{$addr}) {
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push @res, "FREE ERROR: Memory freed twice: $line\n";
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push @res, "FREE ERROR: Previously freed at: $getmem{$addr}\n";
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}
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else {
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$totalmem -= $sizeataddr{$addr};
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if($trace) {
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push @res, "FREE: malloc at $getmem{$addr} is freed again at $source:$linenum\n";
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push @res, "FREE: $sizeataddr{$addr} bytes freed, left allocated: $totalmem bytes\n";
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}
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newtotal($totalmem);
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$frees++;
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$sizeataddr{$addr}=-1; # set -1 to mark as freed
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$getmem{$addr}="$source:$linenum";
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}
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}
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elsif($function =~ /malloc\((\d*)\) = 0x([0-9a-f]*)/) {
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$size = $1;
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$addr = $2;
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if($sizeataddr{$addr} && $sizeataddr{$addr}>0) {
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# this means weeeeeirdo
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push @res, "Mixed debug compile ($source:$linenum at line $lnum), rebuild curl now\n";
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push @res, "We think $sizeataddr{$addr} bytes are already allocated at that memory address: $addr!\n";
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}
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$sizeataddr{$addr} = $size;
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$totalmem += $size;
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$memsum += $size;
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if($trace) {
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push @res, "MALLOC: malloc($size) at $source:$linenum makes totally $totalmem bytes\n";
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}
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newtotal($totalmem);
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$mallocs++;
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$getmem{$addr}="$source:$linenum";
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}
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elsif($function =~ /calloc\((\d*),(\d*)\) = 0x([0-9a-f]*)/) {
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$size = $1 * $2;
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$addr = $3;
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my $arg1 = $1;
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my $arg2 = $2;
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if($sizeataddr{$addr} && $sizeataddr{$addr}>0) {
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# this means weeeeeirdo
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push @res, "Mixed debug compile ($source:$linenum at line $lnum), rebuild curl now\n";
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push @res, "We think $sizeataddr{$addr} bytes are already allocated at that memory address: $addr!\n";
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}
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$sizeataddr{$addr} = $size;
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$totalmem += $size;
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$memsum += $size;
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if($trace) {
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push @res, "CALLOC: calloc($arg1,$arg2) at $source:$linenum makes totally $totalmem bytes\n";
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}
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newtotal($totalmem);
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$callocs++;
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$getmem{$addr}="$source:$linenum";
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}
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elsif($function =~ /realloc\((\(nil\)|0x([0-9a-f]*)), (\d*)\) = 0x([0-9a-f]*)/) {
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my ($oldaddr, $newsize, $newaddr) = ($2, $3, $4);
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my $oldsize = '-';
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if($oldaddr) {
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$oldsize = $sizeataddr{$oldaddr} ? $sizeataddr{$oldaddr} : 0;
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$totalmem -= $oldsize;
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if($trace) {
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}
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$sizeataddr{$oldaddr} = 0;
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$getmem{$oldaddr} = "";
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}
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$totalmem += $newsize;
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$memsum += $newsize;
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$sizeataddr{$newaddr} = $newsize;
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if($trace) {
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push @res, "REALLOC: $oldsize less bytes and $newsize more bytes ($source:$linenum)\n";
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}
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newtotal($totalmem);
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$reallocs++;
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$getmem{$newaddr}="$source:$linenum";
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}
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elsif($function =~ /strdup\(0x([0-9a-f]*)\) \((\d*)\) = 0x([0-9a-f]*)/) {
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# strdup(a5b50) (8) = df7c0
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$dup = $1;
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$size = $2;
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$addr = $3;
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$getmem{$addr} = "$source:$linenum";
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$sizeataddr{$addr} = $size;
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$totalmem += $size;
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$memsum += $size;
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if($trace) {
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push @res, "STRDUP: $size bytes at $getmem{$addr}, makes totally: $totalmem bytes\n";
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}
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newtotal($totalmem);
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$strdups++;
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}
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elsif($function =~ /wcsdup\(0x([0-9a-f]*)\) \((\d*)\) = 0x([0-9a-f]*)/) {
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# wcsdup(a5b50) (8) = df7c0
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$dup = $1;
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$size = $2;
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$addr = $3;
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$getmem{$addr}="$source:$linenum";
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$sizeataddr{$addr}=$size;
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$totalmem += $size;
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$memsum += $size;
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if($trace) {
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push @res, "WCSDUP: $size bytes at $getmem{$addr}, makes totally: $totalmem bytes\n";
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}
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newtotal($totalmem);
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$wcsdups++;
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}
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else {
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push @res, "Not recognized input line: $function\n";
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}
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}
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# FD url.c:1282 socket() = 5
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elsif($_ =~ /^FD ([^ ]*):(\d*) (.*)/) {
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# generic match for the filename+linenumber
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$source = $1;
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$linenum = $2;
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$function = $3;
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if($function =~ /socket\(\) = (\d*)/) {
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$filedes{$1} = 1;
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$getfile{$1} = "$source:$linenum";
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$openfile++;
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$sockets++; # number of socket() calls
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}
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elsif($function =~ /socketpair\(\) = (\d*) (\d*)/) {
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$filedes{$1} = 1;
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$getfile{$1} = "$source:$linenum";
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$openfile++;
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$filedes{$2} = 1;
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$getfile{$2} = "$source:$linenum";
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$openfile++;
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}
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elsif($function =~ /accept\(\) = (\d*)/) {
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$filedes{$1} = 1;
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$getfile{$1} = "$source:$linenum";
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$openfile++;
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}
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elsif($function =~ /sclose\((\d*)\)/) {
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if($filedes{$1} != 1) {
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push @res, "Close without open: $line\n";
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}
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else {
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$filedes{$1}=0; # closed now
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$openfile--;
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}
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}
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}
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# FILE url.c:1282 fopen("blabla") = 0x5ddd
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elsif($_ =~ /^FILE ([^ ]*):(\d*) (.*)/) {
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# generic match for the filename+linenumber
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$source = $1;
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$linenum = $2;
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$function = $3;
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if($function =~ /f[d]*open\(\"(.*)\",\"([^\"]*)\"\) = (\(nil\)|0x([0-9a-f]*))/) {
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if($3 eq "(nil)") {
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;
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}
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else {
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$fopen{$4} = 1;
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$fopenfile{$4} = "$source:$linenum";
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$fopens++;
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}
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}
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# fclose(0x1026c8)
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elsif($function =~ /fclose\(0x([0-9a-f]*)\)/) {
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if(!$fopen{$1}) {
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push @res, "fclose() without fopen(): $line\n";
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}
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else {
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$fopen{$1} = 0;
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$fopens--;
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}
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}
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}
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# GETNAME url.c:1901 getnameinfo()
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elsif($_ =~ /^GETNAME ([^ ]*):(\d*) (.*)/) {
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# not much to do
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}
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# ADDR url.c:1282 getaddrinfo() = 0x5ddd
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elsif($_ =~ /^ADDR ([^ ]*):(\d*) (.*)/) {
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# generic match for the filename+linenumber
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$source = $1;
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$linenum = $2;
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$function = $3;
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if($function =~ /getaddrinfo\(\) = (\(nil\)|0x([0-9a-f]*))/) {
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my $add = $1;
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if($add eq "(nil)") {
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;
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}
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else {
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$addrinfo{$add} = 1;
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$addrinfofile{$add} = "$source:$linenum";
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$addrinfos++;
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}
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if($trace) {
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push @res, "GETADDRINFO ($source:$linenum)\n";
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}
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}
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# fclose(0x1026c8)
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elsif($function =~ /freeaddrinfo\((0x[0-9a-f]*)\)/) {
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my $addr = $1;
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if(!$addrinfo{$addr}) {
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push @res, "freeaddrinfo() without getaddrinfo(): $line\n";
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}
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else {
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$addrinfo{$addr} = 0;
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$addrinfos--;
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}
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if($trace) {
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push @res, "FREEADDRINFO ($source:$linenum)\n";
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}
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}
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}
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else {
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push @res, "Not recognized prefix line: $line\n";
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}
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}
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close($fileh);
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if($totalmem) {
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push @res, "Leak detected: memory still allocated: $totalmem bytes\n";
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for(keys %sizeataddr) {
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$addr = $_;
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$size = $sizeataddr{$addr};
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if($size > 0) {
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push @res, "At $addr, there is $size bytes.\n";
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push @res, " allocated by $getmem{$addr}\n";
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}
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}
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}
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if($openfile) {
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for(keys %filedes) {
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if($filedes{$_} == 1) {
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push @res, "Open file descriptor created at $getfile{$_}.\n";
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}
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}
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}
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if($fopens) {
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push @res, "Open FILE handles left at:\n";
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for(keys %fopen) {
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if($fopen{$_} == 1) {
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push @res, "fopen() called at $fopenfile{$_}.\n";
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}
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}
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}
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if($addrinfos) {
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push @res, "IPv6-style name resolve data left at:\n";
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for(keys %addrinfofile) {
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if($addrinfo{$_} == 1) {
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push @res, "getaddrinfo() called at $addrinfofile{$_}.\n";
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}
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}
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}
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if($verbose) {
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push @res,
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"Mallocs: $mallocs\n",
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"Reallocs: $reallocs\n",
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"Callocs: $callocs\n",
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"Strdups: $strdups\n",
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"Wcsdups: $wcsdups\n",
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"Frees: $frees\n",
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"Sockets: $sockets\n",
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"Allocations: ".($mallocs + $callocs + $reallocs + $strdups + $wcsdups)."\n",
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"Operations: ".($mallocs + $callocs + $reallocs + $strdups + $wcsdups + $sockets)."\n",
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"Maximum allocated: $maxmem\n",
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"Total allocated: $memsum\n";
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}
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return @res;
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}
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1;
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