gdb/gdb-subrange-no-type.patch

commit 7d8bdfbdfd0e38fb314d70785b0516181b8d4e77
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Date:   Mon Mar 26 20:49:51 2012 +0200

    https://bugzilla.redhat.com/show_bug.cgi?id=806920
    gdb.dwarf2/dw2-subrange-no-type.exp

--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -9014,6 +9014,44 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
   /* Preserve BASE_TYPE's original type, just set its LENGTH.  */
   check_typedef (base_type);
 
+  /* Dwarf-2 specifications explicitly allows to create subrange types
+     without specifying a base type.
+     In that case, the base type must be set to the type of
+     the lower bound, upper bound or count, in that order, if any of these
+     three attributes references an object that has a type.
+     If no base type is found, the Dwarf-2 specifications say that
+     a signed integer type of size equal to the size of an address should
+     be used.
+     For the following C code: `extern char gdb_int [];'
+     GCC produces an empty range DIE.
+     FIXME: muller/2010-05-28: Possible references to object for low bound,
+     high bound or count are not yet handled by this code.  */
+  if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
+    {
+      struct objfile *objfile = cu->objfile;
+      struct gdbarch *gdbarch = get_objfile_arch (objfile);
+      int addr_size = gdbarch_addr_bit (gdbarch) /8;
+      struct type *int_type = objfile_type (objfile)->builtin_int;
+
+      /* Test "int", "long int", and "long long int" objfile types,
+	 and select the first one having a size above or equal to the
+	 architecture address size.  */
+      if (int_type && TYPE_LENGTH (int_type) >= addr_size)
+	base_type = int_type;
+      else
+	{
+	  int_type = objfile_type (objfile)->builtin_long;
+	  if (int_type && TYPE_LENGTH (int_type) >= addr_size)
+	    base_type = int_type;
+	  else
+	    {
+	      int_type = objfile_type (objfile)->builtin_long_long;
+	      if (int_type && TYPE_LENGTH (int_type) >= addr_size)
+		base_type = int_type;
+	    }
+	}
+    }
+
   /* The die_type call above may have already set the type for this DIE.  */
   range_type = get_die_type (die, cu);
   if (range_type)
@@ -9141,44 +9179,6 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
       TYPE_HIGH_BOUND (range_type) = high;
     }
 
-  /* Dwarf-2 specifications explicitly allows to create subrange types
-     without specifying a base type.
-     In that case, the base type must be set to the type of
-     the lower bound, upper bound or count, in that order, if any of these
-     three attributes references an object that has a type.
-     If no base type is found, the Dwarf-2 specifications say that
-     a signed integer type of size equal to the size of an address should
-     be used.
-     For the following C code: `extern char gdb_int [];'
-     GCC produces an empty range DIE.
-     FIXME: muller/2010-05-28: Possible references to object for low bound,
-     high bound or count are not yet handled by this code.  */
-  if (TYPE_CODE (base_type) == TYPE_CODE_VOID)
-    {
-      struct objfile *objfile = cu->objfile;
-      struct gdbarch *gdbarch = get_objfile_arch (objfile);
-      int addr_size = gdbarch_addr_bit (gdbarch) /8;
-      struct type *int_type = objfile_type (objfile)->builtin_int;
-
-      /* Test "int", "long int", and "long long int" objfile types,
-	 and select the first one having a size above or equal to the
-	 architecture address size.  */
-      if (int_type && TYPE_LENGTH (int_type) >= addr_size)
-	base_type = int_type;
-      else
-	{
-	  int_type = objfile_type (objfile)->builtin_long;
-	  if (int_type && TYPE_LENGTH (int_type) >= addr_size)
-	    base_type = int_type;
-	  else
-	    {
-	      int_type = objfile_type (objfile)->builtin_long_long;
-	      if (int_type && TYPE_LENGTH (int_type) >= addr_size)
-		base_type = int_type;
-	    }
-	}
-    }
-
   /* DW_AT_bit_stride is currently unsupported as we count in bytes.  */
   attr = dwarf2_attr (die, DW_AT_byte_stride, cu);
   if (attr && attr_form_is_block (attr) && cu->language != language_ada)
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-subrange-no-type.S
@@ -0,0 +1,121 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2012 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/>.  */
+
+/* Debug information */
+
+	.section	.data
+vardata:
+	.rept		129
+	.ascii		"x"
+	.endr
+	.ascii		"UNSEEN\0"
+
+	.section	.debug_info
+.Lcu1_begin:
+	.4byte		.Lcu1_end - .Lcu1_start	/* Length of Compilation Unit */
+.Lcu1_start:
+	.2byte		2			/* DWARF version number */
+	.4byte		.Ldebug_abbrev0		/* Offset Into Abbrev. Section */
+	.byte		4			/* Pointer Size (in bytes) */
+
+	/* CU die */
+	.uleb128	1			/* Abbrev: DW_TAG_compile_unit */
+	.ascii		"GNU C 3.3.3\0"		/* DW_AT_producer */
+	.byte		2			/* DW_AT_language (C) -  */
+
+.Larray_type:
+	.uleb128	2			/* Abbrev: DW_TAG_array_type */
+	.4byte		.Lchar_type-.Lcu1_begin	/* DW_AT_type */
+
+	.uleb128	8			/* Abbrev: DW_TAG_subrange_type without DW_AT_type */
+	.byte		0			/* DW_AT_lower_bound */
+	.byte		128			/* DW_AT_upper_bound */
+
+	.byte		0			/* End of children of die */
+
+.Lchar_type:
+	.uleb128	4			/* Abbrev: DW_TAG_base_type */
+	.ascii		"char\0"		/* DW_AT_name */
+	.byte		1			/* DW_AT_byte_size */
+	.byte		6			/* DW_AT_encoding */
+
+	.uleb128	6			/* Abbrev: DW_TAG_variable DW_FORM_string */
+	.ascii		"notype_string\0"	/* DW_AT_name */
+	.4byte		.Larray_type-.Lcu1_begin /* DW_AT_type */
+	.byte		2f - 1f			/* DW_AT_location */
+1:	.byte		3			/*   DW_OP_addr */
+	.4byte		vardata			/*   <addr> */
+2:
+
+	.byte		0			/* End of children of CU */
+.Lcu1_end:
+
+	.section .debug_abbrev
+.Ldebug_abbrev0:
+	.uleb128	1			/* Abbrev code */
+	.uleb128	0x11			/* DW_TAG_compile_unit */
+	.byte		0x1			/* has_children */
+	.uleb128	0x25			/* DW_AT_producer */
+	.uleb128	0x8			/* DW_FORM_string */
+	.uleb128	0x13			/* DW_AT_language */
+	.uleb128	0xb			/* DW_FORM_data1 */
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
+
+	.uleb128	2			/* Abbrev code */
+	.uleb128	0x1			/* TAG: DW_TAG_array_type */
+	.byte		0x1			/* DW_children_yes */
+	.uleb128	0x49			/* DW_AT_type */
+	.uleb128	0x13			/* DW_FORM_ref4 */
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
+
+	.uleb128	4			/* Abbrev code */
+	.uleb128	0x24			/* DW_TAG_base_type */
+	.byte		0x0			/* no_children */
+	.uleb128	0x3			/* DW_AT_name */
+	.uleb128	0x8			/* DW_FORM_string */
+	.uleb128	0xb			/* DW_AT_byte_size */
+	.uleb128	0xb			/* DW_FORM_data1 */
+	.uleb128	0x3e			/* DW_AT_encoding */
+	.uleb128	0xb			/* DW_FORM_data1 */
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
+
+	.uleb128	6			/* Abbrev code */
+	.uleb128	0x34			/* DW_TAG_variable */
+	.byte		0x0			/* no_children */
+	.uleb128	0x3			/* DW_AT_name */
+	.uleb128	0x8			/* DW_FORM_string */
+	.uleb128	0x49			/* DW_AT_type */
+	.uleb128	0x13			/* DW_FORM_ref4 */
+	.uleb128	0x2			/* DW_AT_location */
+	.uleb128	0xa			/* DW_FORM_block1 */
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
+
+	.uleb128	8			/* Abbrev code */
+	.uleb128	0x21			/* DW_TAG_subrange_type without DW_AT_type */
+	.byte		0x0			/* no children */
+	.uleb128	0x22			/* DW_AT_lower_bound */
+	.uleb128	0xb			/* DW_FORM_data1 */
+	.uleb128	0x2f			/* DW_AT_upper_bound */
+	.uleb128	0xb			/* DW_FORM_data1 */
+	.byte		0x0			/* Terminator */
+	.byte		0x0			/* Terminator */
+
+	.byte		0x0			/* Terminator */
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-subrange-no-type.exp
@@ -0,0 +1,39 @@
+# Copyright 2012 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/>.
+load_lib dwarf.exp
+
+# https://bugzilla.redhat.com/show_bug.cgi?id=806920
+# read_subrange_type <TYPE_CODE (base_type) == TYPE_CODE_VOID> reinitialization
+# of BASE_TYPE was done too late, it affects DW_TAG_subrange_type without
+# specified DW_AT_type, present only in XLF produced code.
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if {![dwarf2_support]} {
+    return 0  
+}
+
+set testfile dw2-subrange-no-type
+set srcfile ${testfile}.S
+set executable ${testfile}.x
+set binfile ${objdir}/${subdir}/${executable}
+
+if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" object {}] != "" } {
+    return -1
+}
+
+clean_restart $executable
+
+gdb_test "ptype notype_string" {type = char \[129\]}
+gdb_test "p notype_string" " = 'x' <repeats 129 times>"