2017-01-01 07:50:51 +01:00
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# Copyright 2013-2017 Free Software Foundation, Inc.
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2015-05-27 20:50:38 +02:00
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Test PR 18258.
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load_lib dwarf.exp
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# This test can only be run on targets which support DWARF-2 and use gas.
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if {![dwarf2_support]} {
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return 0
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}
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standard_testfile opaque-type-lookup.c opaque-type-lookup-1.S opaque-type-lookup-2.c
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# Create the DWARF.
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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declare_labels partial_unit_defining_a partial_unit_defining_b
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declare_labels partial_unit_with_opaque
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declare_labels struct_a_label struct_b_label
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declare_labels opaque_struct_a_label opaque_struct_b_label
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declare_labels char_type1_label char_type2_label
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global srcdir subdir srcfile
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extern main
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# The partial units are laid out so we're not dependent on the order that
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# they appear in compunit_symtab.includes. We need the one with the
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# opaque definition to appear first to gdb, so we put it in the middle.
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# Either the handling of variable_a or variable_b will be broken (in an
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# unpatched gdb).
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#
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# However, once a partial unit with a non-opaque type is read in we can
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# no longer see the bug as gdb will keep looking until it eventually gets
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# to the defining partial unit, setting aside the symbol lookup cache.
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# So heads up!
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cu {} {
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compile_unit {
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{language @DW_LANG_C}
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{name opaque_before}
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} {
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imported_unit {
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{import $partial_unit_with_opaque ref_addr}
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}
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imported_unit {
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{import $partial_unit_defining_a ref_addr}
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}
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}
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}
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cu {} {
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compile_unit {
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{language @DW_LANG_C}
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{name opaque_after}
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} {
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imported_unit {
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{import $partial_unit_defining_b ref_addr}
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}
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imported_unit {
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{import $partial_unit_with_opaque ref_addr}
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}
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}
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}
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cu {} {
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partial_unit_with_opaque: partial_unit {
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{name "partial_unit_with_opaque"}
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} {
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# Normally gdb doesn't add opaque types to the symbol table
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# but there are times when it will, and in order to exercise
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# this bug we need this entry in the symbol table.
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# By giving it a size of 1 we achieve this.
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opaque_struct_a_label: structure_type {
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{name struct_a}
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{declaration 1 flag}
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{byte_size 1 DW_FORM_sdata}
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}
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opaque_struct_b_label: structure_type {
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{name struct_b}
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{declaration 1 flag}
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{byte_size 1 DW_FORM_sdata}
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}
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DW_TAG_variable {
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{name variable_a}
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{type :$opaque_struct_a_label}
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{external 1 flag}
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{declaration 1 flag}
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}
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DW_TAG_variable {
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{name variable_b}
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{type :$opaque_struct_b_label}
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{external 1 flag}
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{declaration 1 flag}
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}
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}
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}
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cu {} {
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partial_unit_defining_a: partial_unit {
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{name "partial_unit_defining_a"}
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} {
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char_type1_label: base_type {
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{name "signed char"}
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{encoding @DW_ATE_signed}
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{byte_size 1 DW_FORM_sdata}
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}
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struct_a_label: structure_type {
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{name struct_a}
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{byte_size 1 DW_FORM_sdata}
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} {
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member {
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{name xyz}
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{type :$char_type1_label}
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{data_member_location 0 DW_FORM_sdata}
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}
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}
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DW_TAG_variable {
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{name variable_a}
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{type :$struct_a_label}
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{external 1 flag}
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{linkage_name variable_a}
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}
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}
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}
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cu {} {
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partial_unit_defining_b: partial_unit {
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{name "partial_unit_defining_b"}
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} {
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char_type2_label: base_type {
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{name "signed char"}
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{encoding @DW_ATE_signed}
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{byte_size 1 DW_FORM_sdata}
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}
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struct_b_label: structure_type {
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{name struct_b}
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{byte_size 1 DW_FORM_sdata}
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} {
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member {
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{name xyz}
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{type :$char_type2_label}
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{data_member_location 0 DW_FORM_sdata}
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}
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}
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DW_TAG_variable {
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{name variable_b}
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{type :$struct_b_label}
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{external 1 flag}
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{linkage_name variable_b}
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}
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}
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}
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# GDB expands the symbol table with main at start up,
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# so keep this separate.
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cu {} {
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compile_unit {
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{language @DW_LANG_C}
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{name main}
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} {
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subprogram {
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{MACRO_AT_func { main ${srcdir}/${subdir}/${srcfile} }}
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}
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}
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}
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}
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2016-12-23 17:52:18 +01:00
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if [prepare_for_testing "failed to prepare" $testfile "${asm_file} ${srcfile} ${srcfile3}" {nodebug}] {
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2015-05-27 20:50:38 +02:00
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return -1
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}
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if ![runto_main] {
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return -1
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}
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gdb_test "p variable_a" " = {xyz = 97 'a'}"
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gdb_test "p variable_b" " = {xyz = 98 'b'}"
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