aio / timers: Add scripts/switch-timer-api
Add scripts/switch-timer-api to programatically rewrite source files to use the new timer system. Signed-off-by: Alex Bligh <alex@alex.org.uk> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Alex Bligh
Stefan Hajnoczi
parent
b53edf971f
commit
fe10ab540b
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#!/usr/bin/perl
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use strict;
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use warnings;
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use Getopt::Long;
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use FindBin;
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my @legacy = qw(qemu_clock_ptr qemu_get_clock_ns qemu_get_clock_ms qemu_register_clock_reset_notifier qemu_unregister_clock_reset_notifier qemu_new_timer qemu_free_timer qemu_del_timer qemu_mod_timer_ns qemu_mod_timer qemu_run_timers qemu_new_timer_ns qemu_new_timer_us qemu_new_timer_ms);
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my $legacyre = '\b('.join('|', @legacy).')\b';
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my $option_git;
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my $option_dryrun;
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my $option_quiet;
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my $option_rtc;
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my $suffix=".tmp.$$";
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my @files;
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my $getfiles = 'git grep -l -E \'\b((host|rt|vm|rtc)_clock\b|qemu_\w*timer)\' | egrep \'\.[ch]$\' | egrep -v \'qemu-timer\.c$|include/qemu/timer\.h$\'';
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sub Syntax
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{
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print STDERR <<STOP;
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Usage: $FindBin::Script [options] FILE ...
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Translate each FILE to the new Qemu timer API. If no files
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are passed, a reasonable guess is taken.
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Options:
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-q, --quiet Do not show warnings etc
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-d, --dry-run Do a dry run
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-g, --git Generate a git commit for each change
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-r, --rtc Only fix up rtc usage
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-h, --help Print this message
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STOP
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return;
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}
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sub ParseOptions
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{
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if (!GetOptions (
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"dry-run|d" => \$option_dryrun,
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"git|g" => \$option_git,
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"quiet|q" => \$option_quiet,
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"rtc|r" => \$option_rtc,
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"help|h" => sub { Syntax(); exit(0); }
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))
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{
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Syntax();
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die "Bad options";
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}
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if ($#ARGV >=0)
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{
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@files = @ARGV;
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}
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else
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{
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@files = split(/\s+/, `$getfiles`);
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}
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foreach my $file (@files)
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{
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die "Cannot find $file" unless (-f $file && -r $file);
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}
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}
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sub DoWarn
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{
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my $text = shift @_;
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my $line = shift @_;
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return if ($option_quiet);
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chomp ($line);
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print STDERR "$text\n";
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print STDERR "$line\n\n";
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}
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sub Process
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{
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my $ifn = shift @_;
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my $ofn = $ifn.$suffix;
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my $intext;
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my $outtext;
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my $linenum = 0;
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open my $input, "<", $ifn || die "Cannot open $ifn for read: $!";
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while (<$input>)
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{
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my $line = $_;
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$intext .= $line;
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$linenum++;
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# fix the specific uses
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unless ($option_rtc)
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{
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$line =~ s/\bqemu_new_timer(_[num]s)\s*\((vm_|rt_|host_)clock\b/timer_new$1(XXX_$2clock/g;
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$line =~ s/\bqemu_new_timer\s*\((vm_|rt_|host_)clock\b/timer_new(XXX_$1clock/g;
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$line =~ s/\bqemu_get_clock(_[num]s)\s*\((vm_|rt_|host_)clock\b/qemu_clock_get$1(XXX_$2clock/g;
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}
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# rtc is different
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$line =~ s/\bqemu_new_timer(_[num]s)\s*\(rtc_clock\b/timer_new$1(rtc_clock/g;
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$line =~ s/\bqemu_new_timer\s*\(rtc_clock\b/timer_new(rtc_clock/g;
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$line =~ s/\bqemu_get_clock(_[num]s)\s*\(rtc_clock\b/qemu_clock_get$1(rtc_clock/g;
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$line =~ s/\bqemu_register_clock_reset_notifier\s*\(rtc_clock\b/qemu_register_clock_reset_notifier(qemu_clock_ptr(rtc_clock)/g;
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unless ($option_rtc)
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{
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# fix up comments
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$line =~ s/\b(vm_|rt_|host_)clock\b/XXX_$1clock/g if ($line =~ m,^[/ ]+\*,);
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# spurious fprintf error reporting
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$line =~ s/: qemu_new_timer_ns failed/: timer_new_ns failed/g;
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# these have just changed name
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$line =~ s/\bqemu_mod_timer\b/timer_mod/g;
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$line =~ s/\bqemu_mod_timer_(ns|us|ms)\b/timer_mod_$1/g;
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$line =~ s/\bqemu_free_timer\b/timer_free/g;
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$line =~ s/\bqemu_del_timer\b/timer_del/g;
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}
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# fix up rtc_clock
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$line =~ s/QEMUClock \*rtc_clock;/QEMUClockType rtc_clock;/g;
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$line =~ s/\brtc_clock = (vm_|rt_|host_)clock\b/rtc_clock = XXX_$1clock/g;
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unless ($option_rtc)
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{
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# replace any more general uses
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$line =~ s/\b(vm_|rt_|host_)clock\b/qemu_clock_ptr(XXX_$1clock)/g;
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}
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# fix up the place holders
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$line =~ s/\bXXX_vm_clock\b/QEMU_CLOCK_VIRTUAL/g;
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$line =~ s/\bXXX_rt_clock\b/QEMU_CLOCK_REALTIME/g;
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$line =~ s/\bXXX_host_clock\b/QEMU_CLOCK_HOST/g;
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unless ($option_rtc)
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{
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DoWarn("$ifn:$linenum WARNING: timer $1 not fixed up", $line) if ($line =~ /\b((vm_|rt_|host_)clock)\b/);
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DoWarn("$ifn:$linenum WARNING: function $1 not fixed up", $line) if ($line =~ /\b(qemu_new_timer\w+)\b/);
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DoWarn("$ifn:$linenum WARNING: legacy function $1 remains", $line) if ($line =~ /$legacyre/o);
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}
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$outtext .= $line;
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}
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close $input;
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if ($intext ne $outtext)
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{
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print STDERR "Patching $ifn\n" unless ($option_quiet);
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unless ($option_dryrun)
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{
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open my $output, ">", $ofn || die "Cannot open $ofn for write: $!";
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print $output $outtext;
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close $output;
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rename ($ofn, $ifn) || die "Cannot rename temp file to $ifn: $!";
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return 1;
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}
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}
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return 0;
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}
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sub DoCommit
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{
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my $file = shift @_;
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open (my $git, "| git commit -F - $file") || die "Cannot run git commit on $file: $!";
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print $git "timers api: use new timer api in $file\n\nConvert $file to use new timer API.\nThis is an automated commit made by scripts/switch-timer-api\n";
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close ($git);
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}
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ParseOptions;
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foreach my $file (@files)
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{
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my $changed = Process ($file);
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DoCommit($file) if ($changed && $option_git);
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}
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