Add test for modifiable DWARF locations

This adds a test for read/write access to variables with various types of
DWARF locations.  It uses register- and memory locations and composite
locations with register- and memory pieces.

Since the new test calls gdb_test_no_output with commands that contain
braces, it is necessary for string_to_regexp to quote braces as well.
This was not done before.

gdb/testsuite/ChangeLog:

	* gdb.dwarf2/var-access.c: New file.
	* gdb.dwarf2/var-access.exp: New test.
	* lib/gdb-utils.exp (string_to_regexp): Quote braces as well.

1 files changed, 1 insertions, 1 deletions

diff --git a/gdb/testsuite/lib/gdb-utils.exp b/gdb/testsuite/lib/gdb-utils.exp
index ff1b24a..37abb14 100644
--- a/gdb/testsuite/lib/gdb-utils.exp
+++ b/gdb/testsuite/lib/gdb-utils.exp
@@ -34,6 +34,6 @@ proc gdb_init_commands {} {
 
 proc string_to_regexp {str} {
     set result $str
-    regsub -all {[]*+.|()^$\[\\]} $str {\\&} result
+    regsub -all {[]*+.|(){}^$\[\\]} $str {\\&} result
     return $result
 }