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189935b1 | 1 | #! /usr/bin/perl -w |
2 | # | |
3 | # Copyright (C) 2002 by Kevin L. Mitchell <klmitch@mit.edu> | |
4 | # | |
5 | # This program is free software; you can redistribute it and/or modify | |
6 | # it under the terms of the GNU General Public License as published by | |
7 | # the Free Software Foundation; either version 2 of the License, or | |
8 | # (at your option) any later version. | |
9 | # | |
10 | # This program is distributed in the hope that it will be useful, | |
11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | # GNU General Public License for more details. | |
14 | # | |
15 | # You should have received a copy of the GNU General Public License | |
16 | # along with this program; if not, write to the Free Software | |
17 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | # | |
19 | # @(#)$Id: ringlog.pl,v 1.4 2004/07/01 12:38:28 entrope Exp $ | |
20 | # | |
21 | # This program is intended to be used in conjunction with ringlog and | |
22 | # the binutils program addr2line. The -r option specifies the path to | |
23 | # the ringlog program; the -a option specifies the path to addr2line. | |
24 | # (Both of these default to assuming that the programs are in your | |
25 | # PATH.) All other options are passed to addr2line, and any other | |
26 | # arguments are treated as filenames to pass to ringlog. If no | |
27 | # filenames are given, the program operates in filter mode, expecting | |
28 | # to get output from ringlog on its standard input. In this case, | |
29 | # ringlog will not be directly executed, but addr2line still will. | |
30 | ||
31 | use strict; | |
32 | ||
33 | use Socket; | |
34 | use IO::Handle; | |
35 | ||
36 | sub start_addr2line { | |
37 | my ($location, @args) = @_; | |
38 | ||
39 | unshift(@args, '-f'); # always get functions | |
40 | ||
41 | # Get a socket pair | |
42 | socketpair(CHILD, PARENT, AF_UNIX, SOCK_STREAM, PF_UNSPEC) | |
43 | or die "socketpair: $!"; | |
44 | ||
45 | CHILD->autoflush(1); # Make sure autoflush is turned on | |
46 | PARENT->autoflush(1); | |
47 | ||
48 | my $pid; | |
49 | ||
50 | # Fork... | |
51 | die "cannot fork: $!" | |
52 | unless (defined($pid = fork)); | |
53 | ||
54 | if (!$pid) { # in child | |
55 | close(CHILD); | |
56 | open(STDIN, "<&PARENT"); | |
57 | open(STDOUT, ">&PARENT"); | |
58 | exec($location, @args); # exec! | |
59 | } | |
60 | ||
61 | # in parent | |
62 | close(PARENT); | |
63 | ||
64 | return \*CHILD; # Return a filehandle for it | |
65 | } | |
66 | ||
67 | sub xlate_addr { | |
68 | my ($fh, $addr) = @_; | |
69 | ||
70 | # Feed address into addr2line | |
71 | print $fh "$addr\n"; | |
72 | ||
73 | # Get function name, file name, and line number | |
74 | my $function = <$fh> || die "Couldn't get function name"; | |
75 | my $fileline = <$fh> || die "Couldn't get file name or line number"; | |
76 | ||
77 | # Remove newlines... | |
78 | chomp($function, $fileline); | |
79 | ||
80 | # If addr2line couldn't translate the address, just return it | |
81 | return "[$addr]" | |
82 | if ($function eq "??"); | |
83 | ||
84 | # return function(file:line)[address] | |
85 | return "$function($fileline)[$addr]"; | |
86 | } | |
87 | ||
88 | sub start_ringlog { | |
89 | my ($location, @args) = @_; | |
90 | ||
91 | # Build a pipe and fork, through the magic of open() | |
92 | my $pid = open(RINGLOG, "-|"); | |
93 | ||
94 | # Make sure we forked! | |
95 | die "couldn't fork: $!" | |
96 | unless (defined($pid)); | |
97 | ||
98 | # Execute ringlog... | |
99 | exec($location, @args) | |
100 | unless ($pid); | |
101 | ||
102 | return \*RINGLOG; | |
103 | } | |
104 | ||
105 | sub parse_ringlog { | |
106 | my ($ringlog, $addr) = @_; | |
107 | my $state = "reading"; | |
108 | ||
109 | while (<$ringlog>) { | |
110 | chomp; | |
111 | ||
112 | # Beginning of parsable data | |
113 | if (/^File.*contents:$/) { | |
114 | $state = "parsing"; | |
115 | ||
116 | # Here's actual parsable data, so parse it | |
117 | } elsif ($state eq "parsing" && /^\s*\d+/) { | |
118 | s/(0x[a-fA-F0-9]+)/&xlate_addr($addr, $1)/eg; | |
119 | ||
120 | # Switch out of parsing mode | |
121 | } else { | |
122 | $state = "reading"; | |
123 | } | |
124 | ||
125 | # Print the final result | |
126 | print "$_\n"; | |
127 | } | |
128 | } | |
129 | ||
130 | # get an argument for an option that requires one | |
131 | sub getarg (\$) { | |
132 | my ($iref) = @_; | |
133 | ||
134 | $ARGV[$$iref] =~ /^(-.)(.*)/; | |
135 | ||
136 | die "Argument for $1 missing" | |
137 | unless ((defined($2) && $2 ne "") || @ARGV > $$iref + 1); | |
138 | ||
139 | return defined($2) && $2 ne "" ? $2 : $ARGV[++$$iref]; | |
140 | } | |
141 | ||
142 | my ($ringlog_exe, $addr2line_exe) = ("ringlog", "addr2line"); | |
143 | my (@addr2line_args, @files); | |
144 | ||
145 | # Deal with arguments; note that we have to deal with -b and -e for | |
146 | # addr2line. | |
147 | for (my $i = 0; $i < @ARGV; $i++) { | |
148 | if ($ARGV[$i] =~ /^-r/) { | |
149 | $ringlog_exe = getarg($i); | |
150 | } elsif ($ARGV[$i] =~ /^-a/) { | |
151 | $addr2line_exe = getarg($i); | |
152 | } elsif ($ARGV[$i] =~ /^-([be])/) { | |
153 | push(@addr2line_args, "-$1", getarg($i)); | |
154 | } elsif ($ARGV[$i] =~ /^-/) { | |
155 | push(@addr2line_args, $ARGV[$i]); | |
156 | } else { | |
157 | push(@files, [ $ARGV[$i], @addr2line_args ]); | |
158 | @addr2line_args = (); | |
159 | } | |
160 | } | |
161 | ||
162 | # Verify that that left us with executable names, at least | |
163 | die "No ringlog executable" | |
164 | unless (defined($ringlog_exe) && $ringlog_exe ne ""); | |
165 | die "No addr2line executable" | |
166 | unless (defined($addr2line_exe) && $addr2line_exe ne ""); | |
167 | ||
168 | # Ok, process each file we've been asked to process | |
169 | foreach my $file (@files) { | |
170 | my ($addr2line, $ringlog) = | |
171 | (start_addr2line($addr2line_exe, @{$file}[1..$#{$file}]), | |
172 | start_ringlog($ringlog_exe, $file->[0])); | |
173 | ||
174 | parse_ringlog($ringlog, $addr2line); | |
175 | ||
176 | close($addr2line); | |
177 | close($ringlog); | |
178 | } | |
179 | ||
180 | # Now if there are still more unprocessed arguments, expect ringlog | |
181 | # input on stdin... | |
182 | if (@addr2line_args) { | |
183 | my $addr2line = start_addr2line($addr2line_exe, @addr2line_args); | |
184 | ||
185 | parse_ringlog(\*STDIN, $addr2line); | |
186 | close($addr2line); | |
187 | } |