357 lines
9.2 KiB
Perl
357 lines
9.2 KiB
Perl
#!/usr/bin/env perl
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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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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 $showlimit;
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while(1) {
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if($ARGV[0] eq "-v") {
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$verbose=1;
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shift @ARGV;
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}
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elsif($ARGV[0] eq "-t") {
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$trace=1;
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shift @ARGV;
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}
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elsif($ARGV[0] eq "-l") {
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# only show what alloc that caused a memlimit failure
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$showlimit=1;
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shift @ARGV;
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}
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else {
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last;
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}
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}
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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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my $file = $ARGV[0];
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if(! -f $file) {
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print "Usage: memanalyze.pl [options] <dump file>\n",
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"Options:\n",
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" -l memlimit failure displayed\n",
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" -v Verbose\n",
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" -t Trace\n";
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exit;
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}
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open(FILE, "<$file");
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if($showlimit) {
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while(<FILE>) {
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if(/^LIMIT.*memlimit$/) {
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print $_;
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last;
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}
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}
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close(FILE);
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exit;
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}
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my $lnum=0;
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while(<FILE>) {
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chomp $_;
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$line = $_;
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$lnum++;
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if($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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print "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\(0x([0-9a-f]*)/) {
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$addr = $1;
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if(!exists $sizeataddr{$addr}) {
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print "FREE ERROR: No memory allocated: $line\n";
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}
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elsif(-1 == $sizeataddr{$addr}) {
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print "FREE ERROR: Memory freed twice: $line\n";
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print "FREE ERROR: Previously freed at: ".$getmem{$addr}."\n";
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}
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else {
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$totalmem -= $sizeataddr{$addr};
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if($trace) {
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print "FREE: malloc at ".$getmem{$addr}." is freed again at $source:$linenum\n";
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printf("FREE: %d bytes freed, left allocated: $totalmem bytes\n", $sizeataddr{$addr});
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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{$addr}>0) {
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# this means weeeeeirdo
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print "Mixed debug compile ($source:$linenum at line $lnum), rebuild curl now\n";
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print "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 += $size;
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if($trace) {
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print "MALLOC: malloc($size) at $source:$linenum",
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" 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 = $3;
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$arg1 = $1;
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$arg2 = $2;
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if($sizeataddr{$addr}>0) {
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# this means weeeeeirdo
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print "Mixed debug compile, rebuild curl now\n";
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}
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$sizeataddr{$addr}=$size;
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$totalmem += $size;
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if($trace) {
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print "CALLOC: calloc($arg1,$arg2) at $source:$linenum",
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" 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, $4);
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$totalmem -= $sizeataddr{$oldaddr};
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if($trace) {
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printf("REALLOC: %d less bytes and ", $sizeataddr{$oldaddr});
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}
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$sizeataddr{$oldaddr}=0;
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$totalmem += $newsize;
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$sizeataddr{$newaddr}=$newsize;
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if($trace) {
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printf("%d more bytes ($source:$linenum)\n", $newsize);
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}
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newtotal($totalmem);
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$reallocs++;
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$getmem{$oldaddr}="";
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$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 += $size;
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if($trace) {
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printf("STRDUP: $size bytes at %s, makes totally: %d bytes\n",
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$getmem{$addr}, $totalmem);
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}
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newtotal($totalmem);
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$strdups++;
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}
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else {
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print "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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}
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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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print "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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print "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 = $2;
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if($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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printf("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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if(!$addrinfo{$1}) {
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print "freeaddrinfo() without getaddrinfo(): $line\n";
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}
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else {
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$addrinfo{$1}=0;
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$addrinfos--;
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}
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if($trace) {
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printf("FREEADDRINFO ($source:$linenum)\n");
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}
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}
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}
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else {
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print "Not recognized prefix line: $line\n";
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}
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}
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close(FILE);
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if($totalmem) {
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print "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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print "At $addr, there's $size bytes.\n";
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print " allocated by ".$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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print "Open file descriptor created at ".$getfile{$_}."\n";
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}
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}
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}
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if($fopens) {
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print "Open FILE handles left at:\n";
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for(keys %fopen) {
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if($fopen{$_} == 1) {
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print "fopen() called at ".$fopenfile{$_}."\n";
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}
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}
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}
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if($addrinfos) {
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print "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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print "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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print "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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"Frees: $frees\n",
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"Allocations: ".($mallocs + $callocs + $reallocs + $strdups)."\n";
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print "Maximum allocated: $maxmem\n";
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}
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