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Re: [patch] PR symtab/13277: Resolving opaque structures in ICC generated binaries. (testcase)

From: John Steele Scott <toojays at toojays dot net>
To: Jan Kratochvil <jan dot kratochvil at redhat dot com>
Cc: gdb-patches at sourceware dot org
Date: Sun, 13 Nov 2011 22:07:41 +1030
Subject: Re: [patch] PR symtab/13277: Resolving opaque structures in ICC generated binaries. (testcase)
References: <4E9A6F3C.6010400@toojays.net> <20111019084011.GA9326@host1.jankratochvil.net> <4EA3E995.8040206@toojays.net> <20111026221057.GA24628@host1.jankratochvil.net>

On 27/10/11 08:40, Jan Kratochvil wrote:
> It would be really good to have a testcase for this ICC case.

I'm forking this thread to allow the test case to be reviewed independently of
the code change.

I have created a .S testcase based on the assembler output from ICC when
compiling the simple test case attached to the bug. I left out some attributes
like column and line number which aren't relevant to this case.

Note that my papers are still in process. I hope to have my employer disclaimer
sorted out this week.

cheers,

John

commit ab653cf1460bfeccc1b3a2a5ff150284144b4b7b
Author: John Steele Scott <toojays@toojays.net>
Date:   Sun Nov 13 19:41:10 2011

    Add test for GDB PR 13277.

gdb/testsuite/Changelog    
    2011-11-13  John Steele Scott  <toojays@toojays.net>
    
    	PR symtab/13277: Resolving opaque structures in ICC generated binaries.
    	* gdb.dwarf2/dw2-icc-opaque.S: New file.
    	* gdb.dwarf2/dw2-icc-opaque.exp: New file.

diff --git a/gdb/testsuite/gdb.dwarf2/dw2-icc-opaque.S b/gdb/testsuite/gdb.dwarf2/dw2-icc-opaque.S
new file mode 100644
index 0000000..07c3220
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-icc-opaque.S
@@ -0,0 +1,192 @@
+/* Copyright 2011 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/>.  */
+
+	.file "opaque-pointer.c"
+	.data
+	.comm p_struct,8,8
+	.global p_struct#
+
+	.section .debug_info
+	.align 1
+debug_info_seg1:
+	.4byte debug_info_seg1_end - 1f	/* Length of compilation unit info. */
+1:
+	.2byte 0x0002			/* DWARF version number. */
+	.4byte .debug_abbrev_seg1	/* Points to abbrev section for this unit. */
+	.byte 0x08			/* Target address size. */
+
+	.byte 0x01			/* DIE 1: DW_TAG_compile_unit. */
+	.byte 0x01			/* DW_AT_language = DW_LANG_C89. */
+	.ascii "Intel(R) C Intel(R) 64 Compiler XE "	/* DW_AT_producer. */
+	.ascii "for applications running on Intel(R) 64, "
+	.ascii "Version 12.0.4.191 Build 20110427\n "
+	.asciz "Fixes SameLinkageName MemberPointers"
+
+	.byte 0x02			/* DIE 2: DW_TAG_variable. */
+	.byte 0x01			/* DW_AT_accessibility. */
+	.asciz "p_struct"		/* DW_AT_name. */
+	.4byte 3f - debug_info_seg1	/* DW_AT_type. */
+	.2byte 0x0309			/* DW_AT_location: 9 bytes, DW_OP_addr */
+	.8byte p_struct			/* followed by the address of p_struct. */
+	.byte 0x01			/* DW_AT_external. */
+
+3:
+	.byte 0x03			/* DIE 3: DW_TAG_pointer_type. */
+	.4byte 4f - debug_info_seg1	/* DW_AT_type. */
+
+4:
+	.byte 0x04			/* DIE 4: DW_TAG_structure_type. */
+	.byte 0x01			/* DW_AT_accessibility. */
+	.byte 0x00			/* DW_AT_byte_size. */
+	.asciz "opaque_struct_t"	/* DW_AT_name. */
+	.byte 0x00
+	.byte 0x00
+	.byte 0x00
+	.byte 0x00
+debug_info_seg1_end:
+
+	.section .debug_abbrev
+.debug_abbrev_seg1:
+	.align 1
+	.byte 0x01	/* Abbrev 1. */
+	.byte 0x11	/* DW_TAG_compile_unit. */
+	.byte 0x01	/* DW_CHILDREN_yes. */
+	.byte 0x13	/* DW_AT_language. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x25	/* DW_AT_producer. */
+	.byte 0x08	/* DW_AT_string. */
+	.2byte 0x0000	/* End abbrev. */
+
+	.byte 0x02	/* Abbrev 2. */
+	.byte 0x34	/* DW_TAG_variable. */
+	.byte 0x00	/* DW_CHILDREN_no. */
+	.byte 0x32	/* DW_AT_accessibility. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x03	/* DW_AT_name. */
+	.byte 0x08	/* DW_FORM_string. */
+	.byte 0x49	/* DW_AT_type. */
+	.byte 0x13	/* DW_FORM_ref4. */
+	.byte 0x02	/* DW_AT_location. */
+	.byte 0x0a	/* DW_FORM_block1. */
+	.byte 0x3f	/* DW_AT_external. */
+	.byte 0x0c	/* DW_FORM_flag. */
+	.2byte 0x0000	/* End abbrev. */
+
+	.byte 0x03	/* Abbrev 3. */
+	.byte 0x0f	/* DW_TAG_pointer_type. */
+	.byte 0x00	/* DW_CHILDREN_no. */
+	.byte 0x49	/* DW_AT_type. */
+	.byte 0x13	/* DW_FORM_ref4. */
+	.2byte 0x0000	/* End abbrev. */
+
+	.byte 0x04	/* Abbrev 4. */
+	.byte 0x13	/* DW_TAG_structure_type. */
+	.byte 0x00	/* DW_CHILDREN_no. */
+	.byte 0x32	/* DW_AT_accessibility. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x0b	/* DW_AT_byte_size. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x03	/* DW_AT_name. */
+	.byte 0x08	/* DW_FORM_string. */
+	.2byte 0x0000	/* End abbrev. */
+	.byte 0x00	/* End abbrev table. */
+
+
+	.file "opaque-struct.c"
+	.section .debug_info
+	.align 1
+debug_info_seg2:
+	.4byte debug_info_seg2_end - 1f	/* Length of compilation unit info. */
+1:
+	.2byte 0x0002			/* DWARF version number. */
+	.4byte .debug_abbrev_seg2	/* Points to abbrev section for this unit. */
+	.byte 0x08			/* Target address size. */
+
+	.byte 0x01			/* DIE 1: DW_TAG_compile_unit. */
+	.byte 0x01			/* DW_AT_language = DW_LANG_C89. */
+	.ascii "Intel(R) C Intel(R) 64 Compiler XE "	/* DW_AT_producer. */
+	.ascii "for applications running on Intel(R) 64, "
+	.ascii "Version 12.0.4.191 Build 20110427\n "
+	.asciz "Fixes SameLinkageName MemberPointers"
+
+	.byte 0x02			/* DIE 2: DW_TAG_structure_type. */
+	.byte 0x01			/* DW_AT_accessibility. */
+	.byte 0x04			/* DW_AT_byte_size. */
+	.asciz "opaque_struct_t"	/* DW_AT_name. */
+
+
+	.byte 0x03			/* DIE 3: DW_TAG_member. */
+	.2byte 0x2302			/* DW_AT_data_member_location, 2 bytes, */
+	.byte 0x00			/* DW_OP_plus_uconst followed by zero. */
+	.asciz "wrapped_value"		/* DW_AT_name. */
+	.4byte 4f - debug_info_seg2	/* DW_AT_type. */
+	.byte 0x00
+
+4:
+	.byte 0x04			/* DIE 4: DW_TAG_base_type. */
+	.byte 0x04			/* DW_AT_byte_size. */
+	.byte 0x05			/* DW_AT_encoding. */
+	.asciz "int"			/* DW_AT_name. */
+	.byte 0x00
+	.byte 0x00
+	.byte 0x00
+	.byte 0x00
+debug_info_seg2_end:
+
+	.section .debug_abbrev
+.debug_abbrev_seg2:
+	.align 1
+	.byte 0x01	/* Abbrev 1. */
+	.byte 0x11	/* DW_TAG_compile_unit. */
+	.byte 0x01	/* DW_CHILDREN_yes. */
+	.byte 0x13	/* DW_AT_language. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x25	/* DW_AT_producer. */
+	.byte 0x08	/* DW_FORM_string. */
+	.2byte 0x0000	/* End abbrev. */
+
+	.byte 0x02	/* Abbrev 2. */
+	.byte 0x13	/* DW_TAG_structure_type. */
+	.byte 0x01	/* DW_CHILDREN_yes. */
+	.byte 0x32	/* DW_AT_accessibility. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x0b	/* DW_AT_byte_size. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x03	/* DW_AT_name. */
+	.byte 0x08	/* DW_FORM_string. */
+	.2byte 0x0000	/* End abbrev. */
+
+	.byte 0x03	/* Abbrev 3. */
+	.byte 0x0d	/* DW_TAG_member. */
+	.byte 0x00	/* DW_CHILDREN_no. */
+	.byte 0x38	/* DW_AT_data_member_location. */
+	.byte 0x0a	/* DW_FORM_block1. */
+	.byte 0x03	/* DW_AT_name. */
+	.byte 0x08	/* DW_FORM_string. */
+	.byte 0x49	/* DW_AT_type. */
+	.byte 0x13	/* DW_FORM_ref4. */
+	.2byte 0x0000	/* End abbrev. */
+
+	.byte 0x04	/* Abbrev 4. */
+	.byte 0x24	/* DW_TAG_base_type. */
+	.byte 0x00	/* DW_CHILDREN_no. */
+	.byte 0x0b	/* DW_AT_byte_size. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x3e	/* DW_AT_encoding. */
+	.byte 0x0b	/* DW_FORM_data1. */
+	.byte 0x03	/* DW_AT_name. */
+	.byte 0x08	/* DW_FORM_string. */
+	.2byte 0x0000	/* End abbrev. */
+	.byte 0x00	/* End abbrev table. */
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-icc-opaque.exp b/gdb/testsuite/gdb.dwarf2/dw2-icc-opaque.exp
new file mode 100644
index 0000000..8fce951
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-icc-opaque.exp
@@ -0,0 +1,37 @@
+# Copyright 2011 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
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if {![dwarf2_support]} {
+    return 0
+}
+
+set testfile "dw2-icc-opaque"
+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
+
+# Before PR 13277 was fixed, this would output:
+# type = struct opaque_struct_t {
+#     <no data fields>
+# } *
+gdb_test "ptype p_struct" "type = struct opaque_struct_t {\r\n *int wrapped_value;\r\n} \\*"

Follow-Ups:
- Re: [patch] PR symtab/13277: Resolving opaque structures in ICC generated binaries. (testcase)
  - From: Tom Tromey

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