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# Copyright 2013-2016 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/>.
# Test PR 18258.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
return 0
}
standard_testfile opaque-type-lookup.c opaque-type-lookup-1.S opaque-type-lookup-2.c
# Create the DWARF.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
declare_labels partial_unit_defining_a partial_unit_defining_b
declare_labels partial_unit_with_opaque
declare_labels struct_a_label struct_b_label
declare_labels opaque_struct_a_label opaque_struct_b_label
declare_labels char_type1_label char_type2_label
global srcdir subdir srcfile
extern main
# The partial units are laid out so we're not dependent on the order that
# they appear in compunit_symtab.includes. We need the one with the
# opaque definition to appear first to gdb, so we put it in the middle.
# Either the handling of variable_a or variable_b will be broken (in an
# unpatched gdb).
#
# However, once a partial unit with a non-opaque type is read in we can
# no longer see the bug as gdb will keep looking until it eventually gets
# to the defining partial unit, setting aside the symbol lookup cache.
# So heads up!
cu {} {
compile_unit {
{language @DW_LANG_C}
{name opaque_before}
} {
imported_unit {
{import $partial_unit_with_opaque ref_addr}
}
imported_unit {
{import $partial_unit_defining_a ref_addr}
}
}
}
cu {} {
compile_unit {
{language @DW_LANG_C}
{name opaque_after}
} {
imported_unit {
{import $partial_unit_defining_b ref_addr}
}
imported_unit {
{import $partial_unit_with_opaque ref_addr}
}
}
}
cu {} {
partial_unit_with_opaque: partial_unit {
{name "partial_unit_with_opaque"}
} {
# Normally gdb doesn't add opaque types to the symbol table
# but there are times when it will, and in order to exercise
# this bug we need this entry in the symbol table.
# By giving it a size of 1 we achieve this.
opaque_struct_a_label: structure_type {
{name struct_a}
{declaration 1 flag}
{byte_size 1 DW_FORM_sdata}
}
opaque_struct_b_label: structure_type {
{name struct_b}
{declaration 1 flag}
{byte_size 1 DW_FORM_sdata}
}
DW_TAG_variable {
{name variable_a}
{type :$opaque_struct_a_label}
{external 1 flag}
{declaration 1 flag}
}
DW_TAG_variable {
{name variable_b}
{type :$opaque_struct_b_label}
{external 1 flag}
{declaration 1 flag}
}
}
}
cu {} {
partial_unit_defining_a: partial_unit {
{name "partial_unit_defining_a"}
} {
char_type1_label: base_type {
{name "signed char"}
{encoding @DW_ATE_signed}
{byte_size 1 DW_FORM_sdata}
}
struct_a_label: structure_type {
{name struct_a}
{byte_size 1 DW_FORM_sdata}
} {
member {
{name xyz}
{type :$char_type1_label}
{data_member_location 0 DW_FORM_sdata}
}
}
DW_TAG_variable {
{name variable_a}
{type :$struct_a_label}
{external 1 flag}
{linkage_name variable_a}
}
}
}
cu {} {
partial_unit_defining_b: partial_unit {
{name "partial_unit_defining_b"}
} {
char_type2_label: base_type {
{name "signed char"}
{encoding @DW_ATE_signed}
{byte_size 1 DW_FORM_sdata}
}
struct_b_label: structure_type {
{name struct_b}
{byte_size 1 DW_FORM_sdata}
} {
member {
{name xyz}
{type :$char_type2_label}
{data_member_location 0 DW_FORM_sdata}
}
}
DW_TAG_variable {
{name variable_b}
{type :$struct_b_label}
{external 1 flag}
{linkage_name variable_b}
}
}
}
# GDB expands the symbol table with main at start up,
# so keep this separate.
cu {} {
compile_unit {
{language @DW_LANG_C}
{name main}
} {
subprogram {
{MACRO_AT_func { main ${srcdir}/${subdir}/${srcfile} }}
}
}
}
}
if [prepare_for_testing "failed to prepare" $testfile "${asm_file} ${srcfile} ${srcfile3}" {nodebug}] {
return -1
}
if ![runto_main] {
return -1
}
gdb_test "p variable_a" " = {xyz = 97 'a'}"
gdb_test "p variable_b" " = {xyz = 98 'b'}"
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