FYI: fix PR 9708

[Tom Tromey <tromey at redhat dot com>]

I'm checking this in.

This fixes PR c++/9708.  The bug is that a method-scoped static variable
can't currently be printed by gdb.  This happens because the variable is
erroneously put into a namespace.

Built and regtested on x86-64 (compile farm).  New test case included.

Tom

2010-03-12  Tom Tromey  <tromey@redhat.com>

	PR c++/9708:
	* dwarf2read.c (die_needs_namespace) <DW_TAG_variable>: A variable
	in a lexical block does not need a namespace.
	(new_symbol) <DW_TAG_variable>: Put extern variables on
	list_in_scope in all cases.

2010-03-12  Tom Tromey  <tromey@redhat.com>

	PR c++/9708:
	* gdb.cp/m-static.exp: Add regression test.
	* gdb.cp/m-static.cc (method): New method.
	(main): Call it.

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 53e2e1e..2d21edb 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -3204,6 +3204,8 @@ process_die (struct die_info *die, struct dwarf2_cu *cu)
 static int
 die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
 {
+  struct attribute *attr;
+
   switch (die->tag)
     {
     case DW_TAG_namespace:
@@ -3231,11 +3233,17 @@ die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu)
 				      spec_cu);
 	}
 
-      if (dwarf2_attr (die, DW_AT_external, cu)
-	  || die->parent->tag == DW_TAG_namespace)
-	return 1;
-
-      return 0;
+      attr = dwarf2_attr (die, DW_AT_external, cu);
+      if (attr == NULL && die->parent->tag != DW_TAG_namespace)
+	return 0;
+      /* A variable in a lexical block of some kind does not need a
+	 namespace, even though in C++ such variables may be external
+	 and have a mangled name.  */
+      if (die->parent->tag ==  DW_TAG_lexical_block
+	  || die->parent->tag ==  DW_TAG_try_block
+	  || die->parent->tag ==  DW_TAG_catch_block)
+	return 0;
+      return 1;
 
     default:
       return 0;
@@ -8413,7 +8421,15 @@ new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
 	      var_decode_location (attr, sym, cu);
 	      attr2 = dwarf2_attr (die, DW_AT_external, cu);
 	      if (attr2 && (DW_UNSND (attr2) != 0))
-		add_symbol_to_list (sym, &global_symbols);
+		{
+		  struct pending **list_to_add;
+
+		  /* A variable with DW_AT_external is never static,
+		     but it may be block-scoped.  */
+		  list_to_add = (cu->list_in_scope == &file_symbols
+				 ? &global_symbols : cu->list_in_scope);
+		  add_symbol_to_list (sym, list_to_add);
+		}
 	      else
 		add_symbol_to_list (sym, cu->list_in_scope);
 	    }
diff --git a/gdb/testsuite/gdb.cp/m-static.cc b/gdb/testsuite/gdb.cp/m-static.cc
index 2a0b61c..7f997ef 100644
--- a/gdb/testsuite/gdb.cp/m-static.cc
+++ b/gdb/testsuite/gdb.cp/m-static.cc
@@ -15,6 +15,12 @@ protected:
 
 public:
   gnu_obj_1(antiquities a, long l) {}
+
+  long method ()
+  {
+    static bool svar = true;
+    return key2;
+  }
 };
 
 const bool gnu_obj_1::test;
@@ -70,5 +76,8 @@ int main()
 
   test4.dummy = test4.elsewhere;
   test4.dummy = 0;
-  return test4.dummy;	// breakpoint: constructs-done
+
+  test1.method (); // breakpoint: constructs-done
+
+  return test4.dummy;
 }
diff --git a/gdb/testsuite/gdb.cp/m-static.exp b/gdb/testsuite/gdb.cp/m-static.exp
index f207462..7b4e0ca 100644
--- a/gdb/testsuite/gdb.cp/m-static.exp
+++ b/gdb/testsuite/gdb.cp/m-static.exp
@@ -132,5 +132,10 @@ gdb_test "print test4.nowhere" "field nowhere is nonexistent or has been optimis
 # that GDB's current behavior in such situations is either consistent
 # across platforms or optimal, so I'm not including one now.
 
+# Step into test1.method and examine the method-scoped static.
+# This is a regression test for PR 9708.
+gdb_test "step" "gnu_obj_1::method.*"
+gdb_test "print svar" " = true"
+
 gdb_exit
 return 0