[RFA/DWARF] variables with no DW_AT_location
Joel Brobecker
brobecker@adacore.com
Thu Mar 29 18:41:00 GMT 2007
> Is this patch coming from an older tree? Because dwarf2read doesn't
> do that any more.
Argh!!! Certain files in my tree had weird tags, and I have no idea
why. I made a clean check out of the sources, and now I see:
Address of symbol "noloc" is unknown.
Thanks for catching this, and sorry for the trouble.
Should we still keep the testcase, though? (revised)
2007-03-29 Joel Brobecker <brobecker@adacore.com>
* gdb.dwarf2/dw2-noloc.S: New file.
* gdb.dwarf2/dw2-noloc.exp: New file.
Tested on x86-linux.
--
Joel
-------------- next part --------------
/* This testcase is part of GDB, the GNU debugger.
Copyright 2007 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA. */
.text
.Lbegin_text1:
.globl func_cu1
.type func_cu1, %function
func_cu1:
.Lbegin_func_cu1:
.int 0
.Lend_func_cu1:
.size func_cu1, .-func_cu1
.Lend_text1:
/* Debug information */
.section .debug_info
.Lcu1_begin:
/* CU header */
.4byte .Lcu1_end - .Lcu1_start /* Length of Compilation Unit */
.Lcu1_start:
.2byte 2 /* DWARF Version */
.4byte .Labbrev1_begin /* Offset into abbrev section */
.byte 4 /* Pointer size */
/* CU die */
.uleb128 1 /* Abbrev: DW_TAG_compile_unit */
.4byte .Lline1_begin /* DW_AT_stmt_list */
.4byte .Lend_text1 /* DW_AT_high_pc */
.4byte .Lbegin_text1 /* DW_AT_low_pc */
.ascii "file1.txt\0" /* DW_AT_name */
.ascii "GNU C 3.3.3\0" /* DW_AT_producer */
.byte 1 /* DW_AT_language (C) */
/* func_cu1 */
.uleb128 2 /* Abbrev: DW_TAG_subprogram */
.byte 1 /* DW_AT_external */
.byte 1 /* DW_AT_decl_file */
.byte 2 /* DW_AT_decl_line */
.ascii "func_cu1\0" /* DW_AT_name */
.4byte .Ltype_int-.Lcu1_begin /* DW_AT_type */
.4byte .Lbegin_func_cu1 /* DW_AT_low_pc */
.4byte .Lend_func_cu1 /* DW_AT_high_pc */
.byte 1 /* DW_AT_frame_base: length */
.byte 0x55 /* DW_AT_frame_base: DW_OP_reg5 */
.Ltype_int:
.uleb128 3 /* Abbrev: DW_TAG_base_type */
.ascii "int\0" /* DW_AT_name */
.byte 4 /* DW_AT_byte_size */
.byte 5 /* DW_AT_encoding */
.uleb128 4 /* Abbrev: DW_TAG_variable */
.ascii "noloc\0" /* DW_AT_name */
.4byte .Ltype_int-.Lcu1_begin /* DW_AT_type */
.byte 1 /* DW_AT_external */
.byte 0 /* End of children of CU */
.Lcu1_end:
/* Abbrev table */
.section .debug_abbrev
.Labbrev1_begin:
.uleb128 1 /* Abbrev code */
.uleb128 0x11 /* DW_TAG_compile_unit */
.byte 1 /* has_children */
.uleb128 0x10 /* DW_AT_stmt_list */
.uleb128 0x6 /* DW_FORM_data4 */
.uleb128 0x12 /* DW_AT_high_pc */
.uleb128 0x1 /* DW_FORM_addr */
.uleb128 0x11 /* DW_AT_low_pc */
.uleb128 0x1 /* DW_FORM_addr */
.uleb128 0x3 /* DW_AT_name */
.uleb128 0x8 /* DW_FORM_string */
.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 0x2e /* DW_TAG_subprogram */
.byte 0 /* has_children */
.uleb128 0x3f /* DW_AT_external */
.uleb128 0xc /* DW_FORM_flag */
.uleb128 0x3a /* DW_AT_decl_file */
.uleb128 0xb /* DW_FORM_data1 */
.uleb128 0x3b /* DW_AT_decl_line */
.uleb128 0xb /* DW_FORM_data1 */
.uleb128 0x3 /* DW_AT_name */
.uleb128 0x8 /* DW_FORM_string */
.uleb128 0x49 /* DW_AT_type */
.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 0x40 /* DW_AT_frame_base */
.uleb128 0xa /* DW_FORM_block1 */
.byte 0x0 /* Terminator */
.byte 0x0 /* Terminator */
.uleb128 3 /* Abbrev code */
.uleb128 0x24 /* DW_TAG_base_type */
.byte 0 /* has_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 4 /* Abbrev code */
.uleb128 0x34 /* DW_TAG_variable */
.byte 0 /* has_children */
.uleb128 0x3 /* DW_AT_name */
.uleb128 0x8 /* DW_FORM_string */
.uleb128 0x49 /* DW_AT_type */
.uleb128 0x13 /* DW_FORM_ref4 */
.uleb128 0x3f /* DW_AT_external */
.uleb128 0xc /* DW_FORM_flag */
.byte 0x0 /* Terminator */
.byte 0x0 /* Terminator */
.byte 0x0 /* Terminator */
.byte 0x0 /* Terminator */
/* Line table */
.section .debug_line
.Lline1_begin:
.4byte .Lline1_end - .Lline1_start /* Initial length */
.Lline1_start:
.2byte 2 /* Version */
.4byte .Lline1_lines - .Lline1_hdr /* header_length */
.Lline1_hdr:
.byte 1 /* Minimum insn length */
.byte 1 /* default_is_stmt */
.byte 1 /* line_base */
.byte 1 /* line_range */
.byte 0x10 /* opcode_base */
/* Standard lengths */
.byte 0
.byte 1
.byte 1
.byte 1
.byte 1
.byte 0
.byte 0
.byte 0
.byte 1
.byte 0
.byte 0
.byte 1
.byte 0
.byte 0
.byte 0
/* Include directories */
.byte 0
/* File names */
.ascii "file1.txt\0"
.uleb128 0
.uleb128 0
.uleb128 0
.byte 0
.Lline1_lines:
.byte 0 /* DW_LNE_set_address */
.uleb128 5
.byte 2
.4byte .Lbegin_func_cu1
.byte 3 /* DW_LNS_advance_line */
.sleb128 3 /* ... to 4 */
.byte 1 /* DW_LNS_copy */
.byte 1 /* DW_LNS_copy (second time as an end-of-prologue marker) */
.byte 0 /* DW_LNE_set_address */
.uleb128 5
.byte 2
.4byte .Lend_func_cu1
.byte 0 /* DW_LNE_end_of_sequence */
.uleb128 1
.byte 1
.Lline1_end:
-------------- next part --------------
# Copyright 2007 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# This test can only be run on targets which support DWARF-2 and use gas.
# For now pick a sampling of likely targets.
if {![istarget *-*-linux*]
&& ![istarget *-*-gnu*]
&& ![istarget *-*-elf*]
&& ![istarget *-*-openbsd*]
&& ![istarget arm-*-eabi*]
&& ![istarget powerpc-*-eabi*]} {
return 0
}
set testfile "dw2-noloc"
set srcfile ${testfile}.S
set binfile ${objdir}/${subdir}/${testfile}.x
if { [gdb_compile "${srcdir}/${subdir}/main.c" "main.o" object {debug}] != "" } {
return -1
}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${testfile}.o" object {nodebug}] != "" } {
return -1
}
if { [gdb_compile "${testfile}.o main.o" "${binfile}" executable {debug}] != "" } {
return -1
}
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
gdb_test "print noloc" "Address of symbol \"noloc\" is unknown." "print noloc"
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