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Re: [RFA] c++/12506

From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
To: Keith Seitz <keiths at redhat dot com>
Cc: gdb-patches at sourceware dot org
Date: Mon, 14 Mar 2011 19:36:24 +0100
Subject: Re: [RFA] c++/12506
References: <4D6FD0BF.8010700@redhat.com>
On Thu, 03 Mar 2011 18:32:47 +0100, Keith Seitz wrote:
> This patch is an attempt to fix c++/12506. In that bug, gdb is
> unable to set a breakpoint in a method because the compiler has
> output different type dies for the declaration and the definition of
> the subprogram.
> 
> However, the compiler has specified DW_AT_specification for the
> method definition. This patch notices (and uses) this while
> computing the physname so that the two method signatures agree.

The declaration DIE uses type `int'.
The definition DIE with DW_AT_low_pc+DW_AT_high_pc uses type `arg_type'.
(`arg_type' is a typedef for `int'.)
The minimal symbol uses type `int'.

I did not understand why specifically declaration or definition should use the
types specific to the linkage.  Currently it seems more as a GCC bug the
declaration does not use the `arg_type' typedef.

But the linkage name should rather get the typedefs expanded instead of
choosing this or that DIE:

ISO C++ standard
3.5 Program and linkage
item 10: After all adjustments of types (during which typedefs (7.1.3) are
         replaced by their definitions), 

I have not reviewed the dwarf2read.c part.

For the testcase part attaching a fix up for compatibility with
	[patch] Fix empty PC range psymtab<->symtab discrepancy
	http://sourceware.org/ml/gdb-patches/2011-03/msg00739.html
and other minor issues.

# -> /**/ is required for some non-standard arch I do not remember (m68k?).



Thanks,
Jan


gdb/testsuite/
2011-03-14  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* gdb.dwarf2/dw2-method-type-spec.exp: Whitespace adjustment.
	* gdb.dwarf2/dw2-method-type-spec.S: Use /**/ instead of #.
	New .text section with labels cu_text_start and cu_text_end.
	(DW_AT_stmt_list, DW_AT_sibling, f2): Remove them all.
	(.debug_abbrev): New label .Labbrev1_begin.
	Whitespace cleanup.

--- a/gdb/testsuite/gdb.dwarf2/dw2-method-type-spec.S
+++ b/gdb/testsuite/gdb.dwarf2/dw2-method-type-spec.S
@@ -18,7 +18,7 @@
 /* This exercises c++/12506.
 
   This test was derived from the following source code:
-	
+
   template<typename types>
   class test
   {
@@ -26,10 +26,6 @@
     void f1 (typename types::arg_type f)
     {
     }
-       
-    void f2 (void)
-    {
-    }
   };
 
   class my_types
@@ -40,326 +36,269 @@
 
 */
 
+	.text
+cu_text_start:
+	/* GDB requires DW_AT_low_pc < DW_AT_high_pc in read_partial_die.  */
+	.byte	0
+cu_text_end:
+
 #define OFFSET(LBL) .Ldie_ ## LBL - .Lcu1_begin
 
 	.section	.debug_info
 .Lcu1_begin:
-	.4byte	.Lcu1_end - .Lcu1_start # Length of Compilation Unit Info
+	.4byte	.Lcu1_end - .Lcu1_start	/* Length of Compilation Unit Info */
 .Lcu1_start:
-	.2byte	0x3		# DWARF version number
-	.long	.Labbrev1_begin	# Offset into abbrev section
-	.byte	0x4		# Pointer size (in bytes)
+	.2byte	0x3		/* DWARF version number */
+	.long	.Labbrev1_begin	/* Offset into abbrev section */
+	.byte	0x4		/* Pointer size (in bytes) */
 
 .Ldie_b:
-	.uleb128 0x1		# (DIE (0xb) DW_TAG_compile_unit)
-	.ascii	"GNU C++ 4.4.5 20101112 (Red Hat 4.4.5-2)\0" # DW_AT_producer
-	.byte	0x4		# DW_AT_language
-	.ascii	"pr12506.cc\0"	# DW_AT_name
-	.long	.Ldebug_line0	# DW_AT_stmt_list
+	.uleb128 0x1		/* (DIE (0xb) DW_TAG_compile_unit) */
+	.ascii	"GNU C++ 4.4.5 20101112 (Red Hat 4.4.5-2)\0"	/* DW_AT_producer */
+	.byte	0x4		/* DW_AT_language */
+	.ascii	"pr12506.cc\0"	/* DW_AT_name */
 
 .Ldie_31:
-	.uleb128 0x2		# (DIE (0x31) DW_TAG_class_type)
-	.ascii 	"my_types\0"	# DW_AT_name
-	.byte	0x1		# DW_AT_byte_size
-	.long	OFFSET (49)	# DW_AT_sibling
+	.uleb128 0x2		/* (DIE (0x31) DW_TAG_class_type) */
+	.ascii 	"my_types\0"	/* DW_AT_name */
+	.byte	0x1		/* DW_AT_byte_size */
 
 .Ldie_3d:
-	.uleb128 0x3		# (DIE (0x3d) DW_TAG_typedef)
-	.ascii	"arg_type\0"	# DW_AT_name
-	.long	OFFSET (49)	# DW_AT_type
-	.byte	0x0		# end of children of DIE 0x31
+	.uleb128 0x3		/* (DIE (0x3d) DW_TAG_typedef) */
+	.ascii	"arg_type\0"	/* DW_AT_name */
+	.long	OFFSET (49)	/* DW_AT_type */
+	.byte	0x0		/* end of children of DIE 0x31 */
 
 .Ldie_49:
-	.uleb128 0x4		# (DIE (0x49) DW_TAG_base_type)
-	.byte	0x4		# DW_AT_byte_size
-	.byte	0x5		# DW_AT_encoding
-	.ascii	"int\0"		# DW_AT_name
+	.uleb128 0x4		/* (DIE (0x49) DW_TAG_base_type) */
+	.byte	0x4		/* DW_AT_byte_size */
+	.byte	0x5		/* DW_AT_encoding */
+	.ascii	"int\0"		/* DW_AT_name */
 
 .Ldie_50:
-	.uleb128 0x2		# (DIE (0x50) DW_TAG_class_type)
-	.ascii	"test<my_types>\0" # DW_at_name
-	.byte	0x1		# DW_AT_byte_size
-	.long	OFFSET (8c)	# DW_AT_sibling
+	.uleb128 0x2		/* (DIE (0x50) DW_TAG_class_type) */
+	.ascii	"test<my_types>\0"	/* DW_at_name */
+	.byte	0x1		/* DW_AT_byte_size */
 
 .Ldie_5c:
-	.uleb128 0x5		# (DIE (0x5c) DW_TAG_subprogram)
-	.byte	0x1		# DW_AT_external
-	.ascii	"f1\0"		# DW_AT_name
-	.byte	0x1		# DW_AT_declaration
-	.long	OFFSET (78)	# DW_AT_sibling
+	.uleb128 0x5		/* (DIE (0x5c) DW_TAG_subprogram) */
+	.byte	0x1		/* DW_AT_external */
+	.ascii	"f1\0"		/* DW_AT_name */
+	.byte	0x1		/* DW_AT_declaration */
 
 .Ldie_6c:
-	.uleb128 0x6		# (DIE (0x6c) DW_TAG_formal_parameter)
-	.long	OFFSET (8c)	# DW_AT_type
-	.byte	0x1		# DW_AT_artificial
+	.uleb128 0x6		/* (DIE (0x6c) DW_TAG_formal_parameter) */
+	.long	OFFSET (8c)	/* DW_AT_type */
+	.byte	0x1		/* DW_AT_artificial */
 
 .Ldie_72:
-	.uleb128 0x7		# (DIE (0x72) DW_TAG_formal_parameter)
-	.long	OFFSET (49)	# DW_AT_type
-	.byte	0x0		# end of children of DIE 0x5c
-
-.Ldie_78:
-	.uleb128 0x8		# (DIE (0x78) DW_TAG_subprogram)
-	.byte	0x1		# DW_AT_external
-	.ascii	"f2\0"		# DW_AT_name
-	.byte	0x1		# DW_AT_declaration
-
-.Ldie_84:
-	.uleb128 0x6		# (DIE (0x84) DW_TAG_formal_parameter)
-	.long	OFFSET (8c)	# DW_AT_type
-	.byte	0x1		# DW_AT_artificial
-	.byte	0x0		# end of children of DIE 0x78
-	.byte	0x0		# end of children of DIE 0x50
+	.uleb128 0x7		/* (DIE (0x72) DW_TAG_formal_parameter) */
+	.long	OFFSET (49)	/* DW_AT_type */
+	.byte	0x0		/* end of children of DIE 0x5c */
+	.byte	0x0		/* end of children of DIE 0x50 */
 
 .Ldie_8c:
-	.uleb128 0x9		# (DIE (0x8c) DW_TAG_pointer_type)
-	.byte	0x4		# DW_AT_byte_size
-	.long	OFFSET (50)	# DW_AT_type
+	.uleb128 0x9		/* (DIE (0x8c) DW_TAG_pointer_type) */
+	.byte	0x4		/* DW_AT_byte_size */
+	.long	OFFSET (50)	/* DW_AT_type */
 
 .Ldie_92:
-	.uleb128 0xa		# (DIE (0x92) DW_TAG_subprogram)
-	.byte	0x1		# DW_AT_external
-	.ascii	"main\0"	# DW_AT_name
-	.long	OFFSET (49)	# DW_AT_type
-	.long	OFFSET (d3)	# DW_AT_sibling
+	.uleb128 0xa		/* (DIE (0x92) DW_TAG_subprogram) */
+	.byte	0x1		/* DW_AT_external */
+	.ascii	"main\0"	/* DW_AT_name */
+	.long	OFFSET (49)	/* DW_AT_type */
 
 .Ldie_b4:
-	.uleb128 0xb		# (DIE (0xb4) DW_TAG_lexical_block)
+	.uleb128 0xb		/* (DIE (0xb4) DW_TAG_lexical_block) */
 
 .Ldie_c5:
-	.uleb128 0xc		# (DIE (0xc5) DW_TAG_variable)
-	.ascii	"t\0"		# DW_AT_name
-	.long	OFFSET (50)	# DW_AT_type
-	.byte	0x0		# end of children of DIE 0xb4
-	.byte	0x0		# end of children of DIE 0x92
+	.uleb128 0xc		/* (DIE (0xc5) DW_TAG_variable) */
+	.ascii	"t\0"		/* DW_AT_name */
+	.long	OFFSET (50)	/* DW_AT_type */
+	.byte	0x0		/* end of children of DIE 0xb4 */
+	.byte	0x0		/* end of children of DIE 0x92 */
 
 .Ldie_d3:
-	.uleb128 0xd		# (DIE (0xd3) DW_TAG_subprogram)
-	.long	OFFSET (5c)	# DW_AT_specification
-	.4byte	cu_text_start	# DW_AT_low_pc
-	.4byte	cu_text_end	# DW_AT_high_pc
-	.long	OFFSET (108)	# DW_AT_sibling
+	.uleb128 0xd		/* (DIE (0xd3) DW_TAG_subprogram) */
+	.long	OFFSET (5c)	/* DW_AT_specification */
+	.4byte	cu_text_start	/* DW_AT_low_pc */
+	.4byte	cu_text_end	/* DW_AT_high_pc */
 
 .Ldie_ee:
-	.uleb128 0xe		# (DIE (0xee) DW_TAG_formal_parameter)
-	.ascii	"this\0"	# DW_AT_name
-	.long	OFFSET (108)	# DW_AT_type
-	.byte	0x1		# DW_AT_artificial
+	.uleb128 0xe		/* (DIE (0xee) DW_TAG_formal_parameter) */
+	.ascii	"this\0"	/* DW_AT_name */
+	.long	OFFSET (108)	/* DW_AT_type */
+	.byte	0x1		/* DW_AT_artificial */
 
 .Ldie_fb:
-	.uleb128 0xf		# (DIE (0xfb) DW_TAG_formal_parameter)
-	.ascii "f\0"		# DW_AT_name
-	.long	OFFSET (3d)	# DW_AT_type
-	.byte	0x0		# end of children of DIE 0xd3
+	.uleb128 0xf		/* (DIE (0xfb) DW_TAG_formal_parameter) */
+	.ascii "f\0"		/* DW_AT_name */
+	.long	OFFSET (3d)	/* DW_AT_type */
+	.byte	0x0		/* end of children of DIE 0xd3 */
 
 .Ldie_108:
-	.uleb128 0x10		# (DIE (0x108) DW_TAG_const_type)
-	.long	OFFSET (8c)	# DW_AT_type
-
-.Ldie_10d:
-	.uleb128 0x11		# (DIE (0x10d) DW_TAG_subprogram)
-	.long	OFFSET (78)	# DW_AT_specification
-	.4byte	cu_text_start	# DW_AT_low_pc
-	.4byte	cu_text_end	# DW_AT_high_pc
-
-.Ldie_124:
-	.uleb128 0xe		# (DIE (0x124) DW_TAG_formal_parameter)
-	.ascii	"this\0"	# DW_AT_name
-	.long	OFFSET (108)	# DW_AT_type
-	.byte	0x1		# DW_AT_artificial
-	.byte	0x0		# end of children of DIE 0x10d
-	.byte	0x0		# end of children of DIE 0xb
+	.uleb128 0x10		/* (DIE (0x108) DW_TAG_const_type) */
+	.long	OFFSET (8c)	/* DW_AT_type */
+	.byte	0x0		/* end of children of DIE 0xb */
 .Lcu1_end:
 
 /* Abbrev table */
 	.section	.debug_abbrev
-	.uleb128 0x1	# (abbrev code)
-	.uleb128 0x11	# (TAG: DW_TAG_compile_unit)
-	.byte	0x1	# DW_children_yes
-	.uleb128 0x25	# (DW_AT_producer)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x13	# (DW_AT_language)
-	.uleb128 0xb	# (DW_FORM_data1)
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string
-	.uleb128 0x10	# (DW_AT_stmt_list)
-	.uleb128 0x6	# (DW_FORM_data4)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0x2	# (abbrev code)
-	.uleb128 0x2	# (DW_TAG_class_type)	
-	.byte	0x1	# DW_children_yes
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0xb	# (DW_AT_byte_size)
-	.uleb128 0xb	# (DW_FORM_data1)
-	.uleb128 0x1	# (DW_AT_sibling)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-
-	.uleb128 0x3	# (abbrev code)
-	.uleb128 0x16	# (DW_TAG_typedef)
-	.byte	0x0	# DW_children_no
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0x4	# (abbrev code)
-	.uleb128 0x24	# (DW_TAG_base_type)
-	.byte	0x0	# DW_children_no
-	.uleb128 0xb	# (DW_AT_byte_size)
-	.uleb128 0xb	# (DW_FORM_data1)
-	.uleb128 0x3e	# (DW_AT_encoding)
-	.uleb128 0xb	# (DW_FORM_data1)
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.byte	0x0
-	.byte	0x0
-
-	.uleb128 0x5	# (abbrev code)
-	.uleb128 0x2e	# (DW_TAG_subprogram)
-	.byte	0x1	# DW_children_yes
-	.uleb128 0x3f	# (DW_AT_external)
-	.uleb128 0xc	# (DW_FORM_flag)
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x3c	# (DW_AT_declaration)
-	.uleb128 0xc	# (DW_FORM_flag)
-	.uleb128 0x1	# (DW_AT_sibling)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-
-	.uleb128 0x6	# (abbrev code)
-	.uleb128 0x5	# (DW_TAG_formal_parameter)
-	.byte	0x0	# DW_children_no
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.uleb128 0x34	# (DW_AT_artificial)
-	.uleb128 0xc	# (DW_FORM_flag)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0x7	# (abbrev code)
-	.uleb128 0x5	# (DW_TAG_formal_parameter)
-	.byte	0x0	# DW_children_no
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-
-	.uleb128 0x8	# (abbrev code)
-	.uleb128 0x2e	# (DW_TAG_subprogram)
-	.byte	0x1	# DW_children_yes
-	.uleb128 0x3f	# (DW_AT_external)
-	.uleb128 0xc	# (DW_FORM_flag)
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x3c	# (DW_AT_declaration)
-	.uleb128 0xc	# (DW_FORM_flag)
-	.byte	0x0
-	.byte	0x0
-
-	.uleb128 0x9	# (abbrev code)
-	.uleb128 0xf	# (DW_TAG_pointer_type)
-	.byte	0x0	# DW_children_no
-	.uleb128 0xb	# (DW_AT_byte_size)
-	.uleb128 0xb	# (DW_FORM_data1)
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0xa	# (abbrev code)
-	.uleb128 0x2e	# (DW_TAG_subprogram)
-	.byte	0x1	# DW_children_yes
-	.uleb128 0x3f	# (DW_AT_external)
-	.uleb128 0xc	# (DW_FORM_flag)
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.uleb128 0x1	# (DW_AT_sibling)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-
-	.uleb128 0xb	# (abbrev code)
-	.uleb128 0xb	# (DW_TAG_lexical_block)
-	.byte	0x1	# DW_children_yes
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0xc	# (abbrev code)
-	.uleb128 0x34	# (DW_TAG_variable)
-	.byte	0x0	# DW_children_no
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0xd	# (abbrev code)
-	.uleb128 0x2e	# (DW_TAG_subprogram)
-	.byte	0x1	# DW_children_yes
-	.uleb128 0x47	# (DW_AT_specification)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.uleb128 0x11	# (DW_AT_low_pc)
-	.uleb128 0x1	# (DW_FORM_addr)
-	.uleb128 0x12	# (DW_AT_high_pc)
-	.uleb128 0x1	# (DW_FORM_addr)
-	.uleb128 0x1	# (DW_AT_sibling)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0xe	# (abbrev code)
-	.uleb128 0x5	# (DW_TAG_formal_parameter)
-	.byte	0x0	# DW_children_no
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.uleb128 0x34	# (DW_AT_artificial)
-	.uleb128 0xc	# (DW_FORM_flag)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0xf	# (abbrev code)
-	.uleb128 0x5	# (DW_TAG_formal_parameter)
-	.byte	0x0	# DW_children_no
-	.uleb128 0x3	# (DW_AT_name)
-	.uleb128 0x8	# (DW_FORM_string)
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0x10	# (abbrev code)
-	.uleb128 0x26	# (DW_TAG_const_type)
-	.byte	0x0	# DW_children_no
-	.uleb128 0x49	# (DW_AT_type)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.byte	0x0
-	.byte	0x0
-	
-	.uleb128 0x11	# (abbrev code)
-	.uleb128 0x2e	# (DW_TAG_subprogram)
-	.byte	0x1	# DW_children_yes
-	.uleb128 0x47	# (DW_AT_specification)
-	.uleb128 0x13	# (DW_FORM_ref4)
-	.uleb128 0x11	# (DW_AT_low_pc)
-	.uleb128 0x1	# (DW_FORM_addr)
-	.uleb128 0x12	# (DW_AT_high_pc)
-	.uleb128 0x1	# (DW_FORM_addr)
-	.byte	0x0
-	.byte	0x0
-	
+.Labbrev1_begin:
+
+	.uleb128 0x1	/* (abbrev code) */
+	.uleb128 0x11	/* (TAG: DW_TAG_compile_unit) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x25	/* (DW_AT_producer) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x13	/* (DW_AT_language) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x2	/* (abbrev code) */
+	.uleb128 0x2	/* (DW_TAG_class_type) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0xb	/* (DW_AT_byte_size) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x3	/* (abbrev code) */
+	.uleb128 0x16	/* (DW_TAG_typedef) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x4	/* (abbrev code) */
+	.uleb128 0x24	/* (DW_TAG_base_type) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0xb	/* (DW_AT_byte_size) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3e	/* (DW_AT_encoding) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x5	/* (abbrev code) */
+	.uleb128 0x2e	/* (DW_TAG_subprogram) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x3f	/* (DW_AT_external) */
+	.uleb128 0xc	/* (DW_FORM_flag) */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x3c	/* (DW_AT_declaration) */
+	.uleb128 0xc	/* (DW_FORM_flag) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x6	/* (abbrev code) */
+	.uleb128 0x5	/* (DW_TAG_formal_parameter) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.uleb128 0x34	/* (DW_AT_artificial) */
+	.uleb128 0xc	/* (DW_FORM_flag) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x7	/* (abbrev code) */
+	.uleb128 0x5	/* (DW_TAG_formal_parameter) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x9	/* (abbrev code) */
+	.uleb128 0xf	/* (DW_TAG_pointer_type) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0xb	/* (DW_AT_byte_size) */
+	.uleb128 0xb	/* (DW_FORM_data1) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0xa	/* (abbrev code) */
+	.uleb128 0x2e	/* (DW_TAG_subprogram) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x3f	/* (DW_AT_external) */
+	.uleb128 0xc	/* (DW_FORM_flag) */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0xb	/* (abbrev code) */
+	.uleb128 0xb	/* (DW_TAG_lexical_block) */
+	.byte	0x1	/* DW_children_yes */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0xc	/* (abbrev code) */
+	.uleb128 0x34	/* (DW_TAG_variable) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0xd	/* (abbrev code) */
+	.uleb128 0x2e	/* (DW_TAG_subprogram) */
+	.byte	0x1	/* DW_children_yes */
+	.uleb128 0x47	/* (DW_AT_specification) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.uleb128 0x11	/* (DW_AT_low_pc) */
+	.uleb128 0x1	/* (DW_FORM_addr) */
+	.uleb128 0x12	/* (DW_AT_high_pc) */
+	.uleb128 0x1	/* (DW_FORM_addr) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0xe	/* (abbrev code) */
+	.uleb128 0x5	/* (DW_TAG_formal_parameter) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.uleb128 0x34	/* (DW_AT_artificial) */
+	.uleb128 0xc	/* (DW_FORM_flag) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0xf	/* (abbrev code) */
+	.uleb128 0x5	/* (DW_TAG_formal_parameter) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0x3	/* (DW_AT_name) */
+	.uleb128 0x8	/* (DW_FORM_string) */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0x0
+	.byte	0x0
+
+	.uleb128 0x10	/* (abbrev code) */
+	.uleb128 0x26	/* (DW_TAG_const_type) */
+	.byte	0x0	/* DW_children_no */
+	.uleb128 0x49	/* (DW_AT_type) */
+	.uleb128 0x13	/* (DW_FORM_ref4) */
+	.byte	0x0
+	.byte	0x0
+
 	.byte	0x0
 	.byte	0x0
--- a/gdb/testsuite/gdb.dwarf2/dw2-method-type-spec.exp
+++ b/gdb/testsuite/gdb.dwarf2/dw2-method-type-spec.exp
@@ -28,8 +28,8 @@ set srcfile $testfile.S
 set executable $testfile.x
 
 if  {[gdb_compile [file join $srcdir $subdir $srcfile] \
-	   [file join $objdir $subdir $executable] \
-	   object {nodebug}] != ""} {
+     [file join $objdir $subdir $executable] \
+     object {nodebug}] != ""} {
     return -1
 }
Follow-Ups:
- Re: [RFA] c++/12506
  - From: Keith Seitz
References:
- [RFA] c++/12506
  - From: Keith Seitz
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