Add little test script to check debug info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113779 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/test_debuginfo.pl b/utils/test_debuginfo.pl
new file mode 100755 (executable)
index 0000000..740405f
--- /dev/null
+++ b/utils/test_debuginfo.pl
@@ -0,0 +1,61 @@
+#!/usr/bin/perl
+#
+# This script tests debugging information generated by a compiler.
+# Input arguments
+#   - Input source program. Usually this source file is decorated using
+#     special comments to communicate debugger commands.
+#   - Executable file. This file is generated by the compiler.
+#
+# This perl script extracts debugger commands from input source program 
+# comments in a script. A debugger is used to load the executable file
+# and run the script generated from source program comments. Finally,
+# the debugger output is checked, using FileCheck, to validate 
+# debugging information.
+
+use File::Basename;
+
+my $testcase_file = $ARGV[0];
+my $executable_file = $ARGV[1];
+
+my $input_filename = basename $testcase_file;
+my $output_dir = dirname $executable_file;
+
+my $debugger_script_file = "$output_dir/$input_filename.gdb.scirpt";
+my $output_file = "$output_dir/$input_filename.gdb.output";
+
+# Extract debugger commands from testcase. They are marked with DEBUGGER: 
+# at the beginnign of a comment line.
+open(INPUT, $testcase_file);
+open(OUTPUT, ">$debugger_script_file");
+while(<INPUT>) {
+    my($line) = $_;
+    $i = index($line, "DEBUGGER:");
+    if ( $i >= 0) {
+        $l = length("DEBUGGER:");
+        $s = substr($line, $i + $l);
+        print OUTPUT  "$s";
+    }
+}
+print OUTPUT "\n";
+print OUTPUT "quit\n";
+close(INPUT);
+close(OUTPUT);
+
+# setup debugger and debugger options to run a script.
+my $my_debugger = $ENV{'DEBUGGER'};
+if (!$my_debugger) {
+    $my_debugger = "gdb";
+}
+my $debugger_options = "-q -batch -n -x";
+
+# run debugger and capture output.
+system("$my_debugger $debugger_options $debugger_script_file $executable_file >& $output_file");
+
+# validate output.
+system("FileCheck", "-input-file", "$output_file", "$testcase_file");
+if ($?>>8 == 1) {
+    exit 1;
+}
+else {
+    exit 0;
+}