gdb/gdb-bz606185-obstack-2of5.patch

commit d54f5671e190a5c0ca8fd1ff070372bf20eb42a8
Author: cmoller <cmoller>
Date:   Wed Apr 21 17:33:51 2010 +0000

    PR 9167
    * cp-valprint.c (cp_print_value_fields): Replaced obstack_base()
    method of popping recursion-detection stack with a method based on
    obstack_object_size().
    * gdb.cp/Makefile.in (EXECUTABLES): Added pr9167.
    * gdb.cp/pr9167.cc: New file.
    * gdb.cp/pr9167.exp: New file.

### a/gdb/ChangeLog
### b/gdb/ChangeLog
## -1,3 +1,10 @@
+2010-04-21  Chris Moller  <cmoller@redhat.com>
+
+	PR 9167
+	* cp-valprint.c (cp_print_value_fields): Replaced obstack_base()
+        method of popping recursion-detection stack with a method based on
+        obstack_object_size().
+
 2010-04-21  Pierre Muller  <muller@ics.u-strasbg.fr>
 
 	PR pascal/11492.
## -3184,7 +3191,7 @@
 	addr_bit.  Adjust LOAD_ADDR sign for cross-arch inferiors.
 
 2010-02-17  Tristan Gingold  <gingold@adacore.com>
-	    Petr Hluzín <petr.hluzin@gmail.com>
+	    Petr Hluzín <petr.hluzin@gmail.com>
 
 	* avr-tdep.c (avr_scan_prologue): Convert an if statement to a
 	gdb_assert.  Fix info->size for SIG prologue.
Index: gdb-7.1/gdb/cp-valprint.c
===================================================================
--- gdb-7.1.orig/gdb/cp-valprint.c	2010-06-28 20:21:53.000000000 +0200
+++ gdb-7.1/gdb/cp-valprint.c	2010-06-28 20:22:16.000000000 +0200
@@ -186,14 +186,13 @@ cp_print_value_fields (struct type *type
     fprintf_filtered (stream, "<No data fields>");
   else
     {
-      void *statmem_obstack_top = NULL;
+      int obstack_initial_size = 0;
       void *stat_array_obstack_top = NULL;
       
       if (dont_print_statmem == 0)
 	{
-	  /* Set the current printed-statics stack top.  */
-	  statmem_obstack_top
-	    = obstack_next_free (&dont_print_statmem_obstack);
+	  obstack_initial_size =
+	    obstack_object_size (&dont_print_statmem_obstack);
 
 	  if (last_set_recurse != recurse)
 	    {
@@ -321,8 +320,19 @@ cp_print_value_fields (struct type *type
 
       if (dont_print_statmem == 0)
 	{
-	  if (obstack_object_size (&dont_print_statmem_obstack) > 0) 
-	    obstack_free (&dont_print_statmem_obstack, statmem_obstack_top);
+	  int obstack_final_size =
+           obstack_object_size (&dont_print_statmem_obstack);
+
+	  if (obstack_final_size > obstack_initial_size) {
+	    /* In effect, a pop of the printed-statics stack.  */
+
+	    void *free_to_ptr =
+	      obstack_next_free (&dont_print_statmem_obstack) -
+	      (obstack_final_size - obstack_initial_size);
+
+	    obstack_free (&dont_print_statmem_obstack,
+			  free_to_ptr);
+	  }
 
 	  if (last_set_recurse != recurse)
 	    {
@@ -555,7 +565,6 @@ cp_print_static_field (struct type *type
       addr = value_address (val);
       obstack_grow (&dont_print_statmem_obstack, (char *) &addr,
 		    sizeof (CORE_ADDR));
-
       CHECK_TYPEDEF (type);
       cp_print_value_fields (type, value_enclosing_type (val),
 			     value_contents_all (val),
Index: gdb-7.1/gdb/testsuite/gdb.cp/pr9167.cc
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.1/gdb/testsuite/gdb.cp/pr9167.cc	2010-06-28 20:22:16.000000000 +0200
@@ -0,0 +1,36 @@
+#include <iostream>
+
+template<typename DATA>
+struct ATB
+{
+    int data;
+    ATB() : data(0) {}
+};
+
+
+template<typename DATA,
+	 typename DerivedType >
+class A : public ATB<DATA>
+{
+public:
+    static DerivedType const DEFAULT_INSTANCE;
+};
+
+template<typename DATA, typename DerivedType>
+const DerivedType A<DATA, DerivedType>::DEFAULT_INSTANCE;
+
+class B : public A<int, B>
+{
+    
+};
+
+int main()
+{
+    B b;
+    // If this if-block is removed then GDB shall
+    // not infinitely recurse when trying to print b.
+
+    return 0;		// marker
+}
+
+
Index: gdb-7.1/gdb/testsuite/gdb.cp/pr9167.exp
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.1/gdb/testsuite/gdb.cp/pr9167.exp	2010-06-28 20:22:16.000000000 +0200
@@ -0,0 +1,31 @@
+#Copyright 2010 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+set testfile pr9167
+set srcfile ${testfile}.cc
+if [prepare_for_testing $testfile.exp $testfile $srcfile {debug c++}] {
+    return -1
+}
+
+if ![runto_main] then {
+    fail "Can't run to main"
+    return
+}
+
+gdb_breakpoint [gdb_get_line_number "marker"]
+gdb_continue_to_breakpoint "marker"
+
+gdb_test "p b" "{<A<int, B>> = {<ATB<int>> = {data = 0}, static DEFAULT_INSTANCE = <optimized out>}, <No data fields>}"
+