Correct handling of no-output

modules/compiler_vm/languages/c11.pm

@@ -11,7 +11,7 @@ sub initialize {
 
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
-  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c11 -lm -Wfatal-errors -fsanitize=bounds -fsanitize=alignment';
+  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c11 -lm -Wfatal-errors -fsanitize=bounds -fsanitize=alignment -fno-diagnostics-show-caret';
   $self->{cmdline}         = 'gcc -ggdb -g3 $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';

modules/compiler_vm/languages/server/_c_base.pm

@@ -31,6 +31,8 @@ sub postprocess {
 
   $result =~ s/\s+$//;
 
+  $self->{no_output} = 1 if not length $result;
+
   $self->{output} .= $result;
 }
 

modules/compiler_vm/languages/server/_c_base.pm_2015-01-15-01:25:37~

@@ -0,0 +1,39 @@
+#!/usr/bin/perl
+
+use warnings;
+use strict;
+
+package _c_base; 
+use parent '_default';
+
+sub postprocess {
+  my $self = shift;
+
+  print "c11 postprocessing\n";
+
+  # no errors compiling, but if output contains something, it must be diagnostic messages
+  if(length $self->{output}) {
+    $self->{output} =~ s/^\s+//;
+    $self->{output} =~ s/\s+$//;
+    $self->{output} = "[$self->{output}]\n";
+  }
+
+  print "Executing gdb\n";
+  my $input_quoted = quotemeta $self->{input};
+  $input_quoted =~ s/\\"/"'\\"'"/g;
+  my ($retval, $result) = $self->execute(60, "bash -c \"date -s \@$self->{date}; ulimit -t 1; compiler_watchdog.pl $input_quoted > .output\"");
+
+  $result = "";
+  open(FILE, '.output');
+  while(<FILE>) {
+    $result .= $_;
+    last if length $result >= 1024 * 20;
+  }
+  close(FILE);
+
+  $result =~ s/\s+$//;
+
+  $self->{output} .= $result;
+}
+
+1;

modules/compiler_vm/languages/server/_default.pm

@@ -44,7 +44,6 @@ sub preprocess {
 }
 
 sub postprocess {
-  print "_default postprocessing\n";
 }
 
 sub execute {

modules/compiler_vm/languages/server/tendra.pm

@@ -30,6 +30,8 @@ sub postprocess {
 
   $result =~ s/\s+$//;
 
+  $self->{no_output} = 1 if not length $result;
+
   $self->{output} .= $result;
 }