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90b17aef1a
This is particularly useful on operating systems that don't ship Perl as part of the base system (eg. FreeBSD) while still working just as well as it did before on Linux. In one case (src/rpc/genprotocol.pl) the interpreter path was missing altogether. Signed-off-by: Andrea Bolognani <abologna@redhat.com>
132 lines
3.7 KiB
Perl
Executable File
132 lines
3.7 KiB
Perl
Executable File
#!/usr/bin/env perl
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#
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# Copyright (C) 2011-2012 Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Author: Daniel P. Berrange <berrange@redhat.com>
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#
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# Generate a set of systemtap probe definitions corresponding to
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# DTrace probe markers in libvirt.so
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#
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# perl dtrace2systemtap.pl probes.d > libvirt_probes.stp
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#
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use strict;
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use warnings;
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my $file;
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my @files;
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my %files;
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my $with_modules = 0;
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if ($ARGV[0] eq "--with-modules") {
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# set if we want to honor the "module" setting in the .d file
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$with_modules = 1;
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shift @ARGV;
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}
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my $bindir = shift @ARGV;
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my $sbindir = shift @ARGV;
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my $libdir = shift @ARGV;
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my $probe;
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my $args;
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# Read the DTraceprobes definition
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while (<>) {
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next if m,^\s*$,;
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next if /^\s*provider\s+\w+\s*{\s*$/;
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next if /^\s*};\s*$/;
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if (m,^\s*\#,) {
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if (m,^\s*\#\s*file:\s*(\S+)\s*$,) {
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$file = $1;
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push @files, $file;
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$files{$file} = { prefix => undef, probes => [] };
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} elsif (m,^\s*\#\s*prefix:\s*(\S+)\s*$,) {
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$files{$file}->{prefix} = $1;
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} elsif (m,^\s*\#\s*binary:\s*(\S+)\s*$,) {
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$files{$file}->{binary} = $1;
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} elsif (m,^\s*\#\s*module:\s*(\S+)\s*$,) {
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$files{$file}->{module} = $1;
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} else {
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# ignore unknown comments
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}
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} else {
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if (m,\s*probe\s+([a-zA-Z0-9_]+)\((.*?)(\);)?$,) {
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$probe = $1;
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$args = $2;
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if ($3) {
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push @{$files{$file}->{probes}}, [$probe, $args];
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$probe = $args = undef;
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}
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} elsif ($probe) {
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if (m,^(.*?)(\);)?$,) {
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$args .= $1;
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if ($2) {
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push @{$files{$file}->{probes}}, [$probe, $args];
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$probe = $args = undef;
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}
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} else {
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die "unexpected data $_ on line $.";
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}
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} else {
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die "unexpected data $_ on line $.";
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}
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}
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}
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# Write out the SystemTap probes
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foreach my $file (@files) {
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my $prefix = $files{$file}->{prefix};
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my @probes = @{$files{$file}->{probes}};
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print "# $file\n\n";
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foreach my $probe (@probes) {
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my $name = $probe->[0];
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my $args = $probe->[1];
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my $pname = $name;
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$pname =~ s/${prefix}_/libvirt.$prefix./;
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my $binary = "$libdir/libvirt.so";
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if (exists $files{$file}->{binary}) {
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$binary = $sbindir . "/" . $files{$file}->{binary};
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}
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if ($with_modules && exists $files{$file}->{module}) {
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$binary = $libdir . "/" . $files{$file}->{module};
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}
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print "probe $pname = process(\"$binary\").mark(\"$name\") {\n";
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my @args = split /,/, $args;
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for (my $i = 0 ; $i <= $#args ; $i++) {
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my $arg = $args[$i];
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my $isstr = $arg =~ /char\s+\*/;
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$arg =~ s/^.*\s\*?(\S+)$/$1/;
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if ($isstr) {
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print " $arg = user_string(\$arg", $i + 1, ");\n";
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} else {
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print " $arg = \$arg", $i + 1, ";\n";
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}
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}
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print "}\n\n";
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}
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print "\n";
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}
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