Add test for use of "<block>::<variable>" syntax for locals in watch.

First, fix a technical problem with the function recurser.  The test sets a
watch on local_x at a point where its value is technically undefined.  The
test is written assuming that the value is not initially 2, but nothing in the
C standard guarantees that.

Second, augment the existing test for variables in recursive calls to check an
equivalent expression that explicitly sets the scope of the local variable
being tracked.

2012-01-11  Paul Hilfinger  <hilfingr@adacore.com>

	* gdb.base/watchpoint.c (recurser): Initialize local_x.
	(main): Repeat recurser call.
	* gdb.base/watchpoint.exp: Check that 'watch recurser::local_x' is
	equivalent to 'local_x'.

1 files changed, 7 insertions, 1 deletions

diff --git a/gdb/testsuite/gdb.base/watchpoint.c b/gdb/testsuite/gdb.base/watchpoint.c
index 50f0a83..88c110f 100644
--- a/gdb/testsuite/gdb.base/watchpoint.c
+++ b/gdb/testsuite/gdb.base/watchpoint.c
@@ -80,7 +80,7 @@ void recurser (int  x)
 void recurser (x) int  x;
 #endif
 {
-  int  local_x;
+  int  local_x = 0;
 
   if (x > 0)
     recurser (x-1);
@@ -232,6 +232,12 @@ int main ()
   marker6 ();
   recurser (2);
 
+  /* This invocation is used for watches of a local variable with explicitly
+     specified scope when recursion happens.
+     */
+  marker6 ();
+  recurser (2);
+
   marker6 ();
 
   func3 ();