mirror of
https://github.com/curl/curl.git
synced 2024-12-09 06:30:06 +08:00
90695fb2c5
This reverts commit7ed25cc, reinstating commit8ec2cb5. As of 18-jul-2013 we still do have code in libcurl that makes use of these memory functions. Commit8ec2cb5comment still applies and is yet valid. These memory functions are solely used in Windows builds, so all related code is protected with '#ifdef WIN32' preprocessor conditional compilation directives. Specifically, wcsdup() _wcsdup() are used when building a Windows target with UNICODE and USE_WINDOWS_SSPI preprocessor symbols defined. This is the case when building a Windows UNICODE target with Windows native SSL/TLS support enabled. Realizing that wcsdup() _wcsdup() are used is a bit tricky given that usage of these is hidden behind _tcsdup() which is MS way of dealing with code that must tolerate UNICODE and non-UNICODE compilation. Additionally, MS header files and those compatible from other compilers use this preprocessor conditional compilation directive in order to select at compilation time whether 'wide' or 'ansi' MS API functions are used. Without this code, Windows build targets with Windows native SSL/TLS support enabled and MemoryTracking support enabled misbehave in tracking memory usage, regardless of being a UNICODE enabled build or not.
407 lines
11 KiB
Perl
Executable File
407 lines
11 KiB
Perl
Executable File
#!/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) 1998 - 2013, 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 http://curl.haxx.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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###########################################################################
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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 $wcsdups=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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$strdups++;
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}
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elsif($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 += $size;
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if($trace) {
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printf("WCSDUP: $size bytes at %s, makes totally: %d bytes\n",
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$getmem{$addr}, $totalmem);
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}
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newtotal($totalmem);
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$wcsdups++;
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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 =~ /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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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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"Wcsdups: $wcsdups\n",
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"Frees: $frees\n",
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"Allocations: ".($mallocs + $callocs + $reallocs + $strdups + $wcsdups)."\n";
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print "Maximum allocated: $maxmem\n";
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}
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