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Do not print values of uninitialized/unassigned objects

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Pragmatic Software 2015-08-16 05:19:53 -07:00
parent b15267c587
commit 593fe59263
1 changed files with 63 additions and 42 deletions
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105
modules/compiler_vm/compiler_watchdog.pl
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@ -16,17 +16,53 @@ my $closing = "\n\n";
my $watching = 0;
my $got_output = 0;
my $local_vars = "";
my $locals_start;
my $locals_end;
my $last_statement;
my ($main_start, $main_end);
sub flushall;
sub gdb;
my ($out, $in);
sub getlocals {
print "getting locals\n" if $debug >= 5;
gdb $in, "print \"Go.\"\ninfo locals\nprint \"Ok.\"\n";
while(my $peep = <$out>) {
chomp $peep;
print "got peep: [$peep]\n" if $debug >= 5;
last if $peep =~ m/\(gdb\) \$\d+ = "Go."/;
# fix this
$peep =~ s/^\d+: (.*?) =/$1 =/;
print "$opening$peep$closing";
$got_output = 1;
}
my $result = {};
while(my $line = <$out>) {
chomp $line;
print "got: [$line]\n" if $debug >= 5;
last if $line =~ m/\(gdb\) \$\d+ = "Ok."/;
if($line =~ m/([^=]+)=\s+(.*)/) {
my $var = $1;
my $value = $2;
$var =~ s/^\(gdb\)\s+//;
$var =~ s/\s+$//;
$result->{$var} = $value;
print " got local: $var = $value\n" if $debug >= 4;
}
}
return $result;
}
sub execute {
my ($cmdline) = @_;
my ($ret, $result);
my ($out, $in);
open2($out, $in, "$cmdline 2>&1");
while(my $line = <$out>) {
@ -61,22 +97,23 @@ sub execute {
gdb $in, "list main,9001\n";
gdb $in, "\nprint \"Ok.\"\n";
my $break = 0;
my $bracket = 0;
my $main_ended = 0;
my ($bracket, $main_ended) = (0);
while(my $line = <$out>) {
chomp $line;
print "list got: [$line]\n" if $debug >= 4;
my ($line_number) = $line =~ m/^(\d+)/g;
my ($line_number) = $line =~ m/^(?:\(gdb\)\s+)?(\d+)/g;
while($line =~ m/(.)/g) {
my $char = $1;
if($char eq '{') {
if($char eq '{' and not $main_ended) {
if ($bracket == 0) {
$main_start = $line_number;
}
$bracket++;
} elsif($char eq '}') {
$bracket--;
if($bracket == 0 and not $main_ended) {
$break = $line_number - 1;
$main_end = $line_number - 1;
$main_ended = 1;
last;
}
@ -86,7 +123,8 @@ sub execute {
last if $line =~ m/^\(gdb\) \$\d+ = "Ok."/;
}
gdb $in, "break $break\n";
gdb $in, "break $main_start\n";
gdb $in, "break $main_end\n";
gdb $in, "set width 0\n";
gdb $in, "set height 0\n";
gdb $in, "run < .input\n";
@ -96,41 +134,21 @@ sub execute {
if($line =~ m/^Breakpoint \d+, main/) {
my $line = <$out>;
print "== got: $line\n" if $debug >= 5;
if($line =~ m/^\d+\s+return.*?;\s*$/ or $line =~ m/^\d+\s+}\s*$/) {
if ($line =~ m/^\d+\s+return.*?;\s*$/ or $line =~ m/^\d+\s+}\s*$/) {
if($got_output == 0) {
print "no output, checking locals\n" if $debug >= 5;
gdb $in, "print \"Go.\"\ninfo locals\nprint \"Ok.\"\n";
$locals_end = getlocals();
while(my $peep = <$out>) {
chomp $peep;
last if $peep =~ m/\(gdb\) \$\d+ = "Go."/;
# fix this
$peep =~ s/^\d+: (.*?) =/$1 =/;
print "$opening$peep$closing";
$got_output = 1;
}
my $result = "";
my $vars = "";
my $varsep = "";
while(my $line = <$out>) {
chomp $line;
print "got: [$line]\n" if $debug >= 5;
last if $line =~ m/\(gdb\) \$\d+ = "Ok."/;
if($line =~ m/([^=]+)=\s+(.*)/) {
$vars .= "$varsep$1= $2";
$varsep = "; ";
my $sep = '';
foreach my $var (keys %$locals_end) {
print "checking local $var...\n" if $debug >= 4;
if ($locals_start->{$var} ne $locals_end->{$var}) {
$local_vars .= "$sep$var = $locals_end->{$var}";
$sep = '; ';
}
}
$result =~ s/^\s+//;
$result =~ s/\s+$//;
$vars =~ s/\(gdb\)\s*//g;
$local_vars = $vars if length $vars;
}
} elsif ($line =~ m/^$main_start\s+/) {
$locals_start = getlocals();
}
gdb $in, "cont\n";
@ -260,15 +278,18 @@ sub execute {
while (my $line = <$out>) {
chomp $line;
print "-- print-last-statement: read [$line]\n" if $debug;
$line =~ s/^\(gdb\)\s*//;
if ($line =~ m/^\$\d+ = "Ok."/) {
last;
} elsif ($line =~ m/^\$\d+ = (.*)/) {
} elsif ($line =~ s/\$\d+ = (.*)$//) {
unless ($1 eq 'void' || $args eq $1) {
$last_statement = "$args = $1";
print "got last statement [$last_statement]\n" if $debug;
}
if (length $line) {
print "$line\n";
$got_output = 1;
}
} else {
$line =~ s/\$\d+ = \d+$//;
print "$line\n";