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executable file 357 lines (309 sloc) 9.398 kb
#!/usr/bin/env perl
#
# Example input:
#
# MEM mprintf.c:1094 malloc(32) = e5718
# MEM mprintf.c:1103 realloc(e5718, 64) = e6118
# MEM sendf.c:232 free(f6520)
my $mallocs=0;
my $callocs=0;
my $reallocs=0;
my $strdups=0;
my $showlimit;
while(1) {
if($ARGV[0] eq "-v") {
$verbose=1;
shift @ARGV;
}
elsif($ARGV[0] eq "-t") {
$trace=1;
shift @ARGV;
}
elsif($ARGV[0] eq "-l") {
# only show what alloc that caused a memlimit failure
$showlimit=1;
shift @ARGV;
}
else {
last;
}
}
my $maxmem;
sub newtotal {
my ($newtot)=@_;
# count a max here
if($newtot > $maxmem) {
$maxmem= $newtot;
}
}
my $file = $ARGV[0];
if(! -f $file) {
print "Usage: memanalyze.pl [options] <dump file>\n",
"Options:\n",
" -l memlimit failure displayed\n",
" -v Verbose\n",
" -t Trace\n";
exit;
}
open(FILE, "<$file");
if($showlimit) {
while(<FILE>) {
if(/^LIMIT.*memlimit$/) {
print $_;
last;
}
}
close(FILE);
exit;
}
my $lnum=0;
while(<FILE>) {
chomp $_;
$line = $_;
$lnum++;
if($line =~ /^LIMIT ([^ ]*):(\d*) (.*)/) {
# new memory limit test prefix
my $i = $3;
my ($source, $linenum) = ($1, $2);
if($trace && ($i =~ /([^ ]*) reached memlimit/)) {
print "LIMIT: $1 returned error at $source:$linenum\n";
}
}
elsif($line =~ /^MEM ([^ ]*):(\d*) (.*)/) {
# generic match for the filename+linenumber
$source = $1;
$linenum = $2;
$function = $3;
if($function =~ /free\(0x([0-9a-f]*)/) {
$addr = $1;
if(!exists $sizeataddr{$addr}) {
print "FREE ERROR: No memory allocated: $line\n";
}
elsif(-1 == $sizeataddr{$addr}) {
print "FREE ERROR: Memory freed twice: $line\n";
print "FREE ERROR: Previously freed at: ".$getmem{$addr}."\n";
}
else {
$totalmem -= $sizeataddr{$addr};
if($trace) {
print "FREE: malloc at ".$getmem{$addr}." is freed again at $source:$linenum\n";
printf("FREE: %d bytes freed, left allocated: $totalmem bytes\n", $sizeataddr{$addr});
}
newtotal($totalmem);
$frees++;
$sizeataddr{$addr}=-1; # set -1 to mark as freed
$getmem{$addr}="$source:$linenum";
}
}
elsif($function =~ /malloc\((\d*)\) = 0x([0-9a-f]*)/) {
$size = $1;
$addr = $2;
if($sizeataddr{$addr}>0) {
# this means weeeeeirdo
print "Mixed debug compile ($source:$linenum at line $lnum), rebuild curl now\n";
print "We think $sizeataddr{$addr} bytes are already allocated at that memory address: $addr!\n";
}
$sizeataddr{$addr}=$size;
$totalmem += $size;
if($trace) {
print "MALLOC: malloc($size) at $source:$linenum",
" makes totally $totalmem bytes\n";
}
newtotal($totalmem);
$mallocs++;
$getmem{$addr}="$source:$linenum";
}
elsif($function =~ /calloc\((\d*),(\d*)\) = 0x([0-9a-f]*)/) {
$size = $1*$2;
$addr = $3;
$arg1 = $1;
$arg2 = $2;
if($sizeataddr{$addr}>0) {
# this means weeeeeirdo
print "Mixed debug compile, rebuild curl now\n";
}
$sizeataddr{$addr}=$size;
$totalmem += $size;
if($trace) {
print "CALLOC: calloc($arg1,$arg2) at $source:$linenum",
" makes totally $totalmem bytes\n";
}
newtotal($totalmem);
$callocs++;
$getmem{$addr}="$source:$linenum";
}
elsif($function =~ /realloc\((\(nil\)|0x([0-9a-f]*)), (\d*)\) = 0x([0-9a-f]*)/) {
my ($oldaddr, $newsize, $newaddr) = ($2, $3, $4);
$totalmem -= $sizeataddr{$oldaddr};
if($trace) {
printf("REALLOC: %d less bytes and ", $sizeataddr{$oldaddr});
}
$sizeataddr{$oldaddr}=0;
$totalmem += $newsize;
$sizeataddr{$newaddr}=$newsize;
if($trace) {
printf("%d more bytes ($source:$linenum)\n", $newsize);
}
newtotal($totalmem);
$reallocs++;
$getmem{$oldaddr}="";
$getmem{$newaddr}="$source:$linenum";
}
elsif($function =~ /strdup\(0x([0-9a-f]*)\) \((\d*)\) = 0x([0-9a-f]*)/) {
# strdup(a5b50) (8) = df7c0
$dup = $1;
$size = $2;
$addr = $3;
$getmem{$addr}="$source:$linenum";
$sizeataddr{$addr}=$size;
$totalmem += $size;
if($trace) {
printf("STRDUP: $size bytes at %s, makes totally: %d bytes\n",
$getmem{$addr}, $totalmem);
}
newtotal($totalmem);
$strdups++;
}
else {
print "Not recognized input line: $function\n";
}
}
# FD url.c:1282 socket() = 5
elsif($_ =~ /^FD ([^ ]*):(\d*) (.*)/) {
# generic match for the filename+linenumber
$source = $1;
$linenum = $2;
$function = $3;
if($function =~ /socket\(\) = (\d*)/) {
$filedes{$1}=1;
$getfile{$1}="$source:$linenum";
$openfile++;
}
elsif($function =~ /accept\(\) = (\d*)/) {
$filedes{$1}=1;
$getfile{$1}="$source:$linenum";
$openfile++;
}
elsif($function =~ /sclose\((\d*)\)/) {
if($filedes{$1} != 1) {
print "Close without open: $line\n";
}
else {
$filedes{$1}=0; # closed now
$openfile--;
}
}
}
# FILE url.c:1282 fopen("blabla") = 0x5ddd
elsif($_ =~ /^FILE ([^ ]*):(\d*) (.*)/) {
# generic match for the filename+linenumber
$source = $1;
$linenum = $2;
$function = $3;
if($function =~ /fopen\(\"([^\"]*)\",\"([^\"]*)\"\) = (\(nil\)|0x([0-9a-f]*))/) {
if($3 eq "(nil)") {
;
}
else {
$fopen{$4}=1;
$fopenfile{$4}="$source:$linenum";
$fopens++;
}
}
# fclose(0x1026c8)
elsif($function =~ /fclose\(0x([0-9a-f]*)\)/) {
if(!$fopen{$1}) {
print "fclose() without fopen(): $line\n";
}
else {
$fopen{$1}=0;
$fopens--;
}
}
}
# GETNAME url.c:1901 getnameinfo()
elsif($_ =~ /^GETNAME ([^ ]*):(\d*) (.*)/) {
# not much to do
}
# ADDR url.c:1282 getaddrinfo() = 0x5ddd
elsif($_ =~ /^ADDR ([^ ]*):(\d*) (.*)/) {
# generic match for the filename+linenumber
$source = $1;
$linenum = $2;
$function = $3;
if($function =~ /getaddrinfo\(\) = (\(nil\)|0x([0-9a-f]*))/) {
my $add = $2;
if($add eq "(nil)") {
;
}
else {
$addrinfo{$add}=1;
$addrinfofile{$add}="$source:$linenum";
$addrinfos++;
}
if($trace) {
printf("GETADDRINFO ($source:$linenum)\n");
}
}
# fclose(0x1026c8)
elsif($function =~ /freeaddrinfo\(0x([0-9a-f]*)\)/) {
if(!$addrinfo{$1}) {
print "freeaddrinfo() without getaddrinfo(): $line\n";
}
else {
$addrinfo{$1}=0;
$addrinfos--;
}
if($trace) {
printf("FREEADDRINFO ($source:$linenum)\n");
}
}
}
else {
print "Not recognized prefix line: $line\n";
}
}
close(FILE);
if($totalmem) {
print "Leak detected: memory still allocated: $totalmem bytes\n";
for(keys %sizeataddr) {
$addr = $_;
$size = $sizeataddr{$addr};
if($size > 0) {
print "At $addr, there's $size bytes.\n";
print " allocated by ".$getmem{$addr}."\n";
}
}
}
if($openfile) {
for(keys %filedes) {
if($filedes{$_} == 1) {
print "Open file descriptor created at ".$getfile{$_}."\n";
}
}
}
if($fopens) {
print "Open FILE handles left at:\n";
for(keys %fopen) {
if($fopen{$_} == 1) {
print "fopen() called at ".$fopenfile{$_}."\n";
}
}
}
if($addrinfos) {
print "IPv6-style name resolve data left at:\n";
for(keys %addrinfofile) {
if($addrinfo{$_} == 1) {
print "getaddrinfo() called at ".$addrinfofile{$_}."\n";
}
}
}
if($verbose) {
print "Mallocs: $mallocs\n",
"Reallocs: $reallocs\n",
"Callocs: $callocs\n",
"Strdups: $strdups\n",
"Frees: $frees\n",
"Allocations: ".($mallocs + $callocs + $reallocs + $strdups)."\n";
print "Maximum allocated: $maxmem\n";
}
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