355 lines
9.8 KiB
Plaintext
355 lines
9.8 KiB
Plaintext
# Copyright 2018-2020 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 support for DW_OP_GNU_variable_value.
|
|
|
|
load_lib dwarf.exp
|
|
|
|
# This test can only be run on targets which support DWARF-2 and use gas.
|
|
if ![dwarf2_support] {
|
|
return 0
|
|
}
|
|
|
|
# We'll place the output of Dwarf::assemble in varval.S.
|
|
standard_testfile .c .S
|
|
|
|
# ${testfile} is now "varval". srcfile2 is "varval.S".
|
|
set executable ${testfile}
|
|
set asm_file [standard_output_file ${srcfile2}]
|
|
|
|
# We need to know the size of integer and address types in order
|
|
# to write some of the debugging info we'd like to generate.
|
|
#
|
|
# For that, we ask GDB by debugging our varval program.
|
|
# Any program would do, but since we already have varval
|
|
# specifically for this testcase, might as well use that.
|
|
if [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] {
|
|
return -1
|
|
}
|
|
|
|
proc setup_exec { arg_bad } {
|
|
global asm_file executable srcfile bad
|
|
set bad ${arg_bad}
|
|
|
|
# Create the DWARF.
|
|
Dwarf::assemble ${asm_file} {
|
|
global srcdir subdir srcfile bad
|
|
|
|
cu {} {
|
|
DW_TAG_compile_unit {
|
|
{DW_AT_language @DW_LANG_C_plus_plus}
|
|
} {
|
|
declare_labels int_label ptr_label struct_label var_a_label \
|
|
var_b_label var_c_label var_p_label var_bad_label \
|
|
varval_label var_s_label var_untyped_label \
|
|
var_a_abstract_label var_a_concrete_label \
|
|
varval2_label varval3_def_label varval3_decl_label \
|
|
int_array_label int_array_of_1_label
|
|
|
|
set int_size [get_sizeof "int" -1]
|
|
|
|
# gdb always assumes references are implemented as pointers.
|
|
set addr_size [get_sizeof "void *" -1]
|
|
|
|
int_label: DW_TAG_base_type {
|
|
{DW_AT_byte_size ${int_size} DW_FORM_udata}
|
|
{DW_AT_encoding @DW_ATE_signed}
|
|
{DW_AT_name "int"}
|
|
}
|
|
|
|
ptr_label: DW_TAG_pointer_type {
|
|
{DW_AT_type :$int_label}
|
|
}
|
|
|
|
var_a_label: DW_TAG_variable {
|
|
{DW_AT_name "var_a"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_a"]} SPECIAL_expr}
|
|
}
|
|
|
|
var_a_abstract_label: DW_TAG_variable {
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
}
|
|
|
|
var_b_label: DW_TAG_variable {
|
|
{DW_AT_name "var_b"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_b"]} SPECIAL_expr}
|
|
}
|
|
|
|
var_c_label: DW_TAG_variable {
|
|
{DW_AT_name "var_c"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_const_value 53 DW_FORM_sdata}
|
|
}
|
|
|
|
var_p_label: DW_TAG_variable {
|
|
{DW_AT_name "var_p"}
|
|
{DW_AT_type :${ptr_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_p"]} SPECIAL_expr}
|
|
}
|
|
|
|
if { $bad } {
|
|
var_bad_label: DW_TAG_variable {
|
|
{DW_AT_name "var_bad"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
}
|
|
}
|
|
|
|
struct_label: DW_TAG_structure_type {
|
|
{DW_AT_byte_size 8*$int_size DW_FORM_sdata}
|
|
} {
|
|
DW_TAG_member {
|
|
{DW_AT_name "a"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 0*$int_size DW_FORM_udata}
|
|
}
|
|
DW_TAG_member {
|
|
{DW_AT_name "b"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 1*$int_size DW_FORM_udata}
|
|
}
|
|
DW_TAG_member {
|
|
{DW_AT_name "c"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 2*$int_size DW_FORM_udata}
|
|
}
|
|
DW_TAG_member {
|
|
{DW_AT_name "d"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 3*$int_size DW_FORM_udata}
|
|
}
|
|
DW_TAG_member {
|
|
{DW_AT_name "e"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 4*$int_size DW_FORM_udata}
|
|
}
|
|
DW_TAG_member {
|
|
{DW_AT_name "f"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 5*$int_size DW_FORM_udata}
|
|
}
|
|
DW_TAG_member {
|
|
{DW_AT_name "g"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 6*$int_size DW_FORM_udata}
|
|
}
|
|
DW_TAG_member {
|
|
{DW_AT_name "h"}
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_data_member_location 7*$int_size DW_FORM_udata}
|
|
}
|
|
}
|
|
|
|
var_s_label: DW_TAG_variable {
|
|
{DW_AT_name "var_s"}
|
|
{DW_AT_type :${struct_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_s"]} SPECIAL_expr}
|
|
}
|
|
|
|
var_untyped_label: DW_TAG_variable {
|
|
{DW_AT_name "var_untyped"}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_b"]} SPECIAL_expr}
|
|
}
|
|
|
|
int_array_label: DW_TAG_array_type {
|
|
{DW_AT_type :${int_label}}
|
|
} {
|
|
DW_TAG_subrange_type {}
|
|
}
|
|
varval3_decl_label: DW_TAG_variable {
|
|
{DW_AT_name "varval3"}
|
|
{DW_AT_type :${int_array_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_declaration 1 DW_FORM_flag}
|
|
}
|
|
int_array_of_1_label: DW_TAG_array_type {
|
|
{DW_AT_type :${int_label}}
|
|
} {
|
|
DW_TAG_subrange_type {
|
|
{DW_AT_type :$int_label}
|
|
{DW_AT_upper_bound 0 DW_FORM_data1}
|
|
}
|
|
}
|
|
varval3_def_label: DW_TAG_variable {
|
|
{DW_AT_name "varval3"}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
{DW_AT_type :${int_array_of_1_label}}
|
|
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_a"]} SPECIAL_expr}
|
|
}
|
|
|
|
DW_TAG_subprogram {
|
|
{MACRO_AT_func { "main" "${srcdir}/${subdir}/${srcfile}" }}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_external 1 DW_FORM_flag}
|
|
} {
|
|
varval_label: DW_TAG_variable {
|
|
{DW_AT_name "varval"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_a_label}
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
varval2_label: DW_TAG_variable {
|
|
{DW_AT_name "varval2"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_a_abstract_label}
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
var_a_concrete_label: DW_TAG_variable {
|
|
{DW_AT_abstract_origin :${var_a_abstract_label}}
|
|
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_a"]} SPECIAL_expr}
|
|
}
|
|
DW_TAG_variable {
|
|
{DW_AT_name "constval"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_c_label}
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
DW_TAG_variable {
|
|
{DW_AT_name "mixedval"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_c_label}
|
|
DW_OP_GNU_variable_value ${var_b_label}
|
|
DW_OP_div
|
|
DW_OP_GNU_variable_value ${varval_label}
|
|
DW_OP_plus
|
|
DW_OP_dup
|
|
DW_OP_plus
|
|
DW_OP_GNU_variable_value ${varval_label}
|
|
DW_OP_minus
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
DW_TAG_variable {
|
|
{DW_AT_name "pointerval"}
|
|
{DW_AT_type :${ptr_label}}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_p_label}
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
if { $bad } {
|
|
DW_TAG_variable {
|
|
{DW_AT_name "badval"}
|
|
{DW_AT_type :${int_label}}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_bad_label}
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
}
|
|
DW_TAG_variable {
|
|
{DW_AT_name "structval"}
|
|
{DW_AT_type :${struct_label}}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_s_label}
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
DW_TAG_variable {
|
|
{DW_AT_name "untypedval"}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${var_untyped_label}
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
if { $bad } {
|
|
DW_TAG_variable {
|
|
{DW_AT_name "bad_die_val1"}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value 0xabcdef11
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
DW_TAG_variable {
|
|
{DW_AT_name "bad_die_val2"}
|
|
{DW_AT_location {
|
|
DW_OP_GNU_variable_value ${ptr_label}+1
|
|
DW_OP_stack_value
|
|
} SPECIAL_expr}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if [prepare_for_testing "failed to prepare" ${executable} [list ${asm_file} ${srcfile}] {}] {
|
|
return -1
|
|
}
|
|
}
|
|
|
|
if { [setup_exec 0] == -1 } {
|
|
return -1
|
|
}
|
|
|
|
with_test_prefix "pre-main" {
|
|
gdb_test "print varval3" "= \\{8\\}" ""
|
|
}
|
|
|
|
# DW_OP_GNU_variable_value implementation requires a valid frame.
|
|
if ![runto_main] {
|
|
return -1
|
|
}
|
|
|
|
gdb_test "print varval" "= 8"
|
|
gdb_test "print varval2" "= 8"
|
|
gdb_test "print varval3" "= \\{8\\}"
|
|
gdb_test "print constval" "= 53"
|
|
gdb_test "print mixedval" "= 42"
|
|
gdb_test "print pointerval" "= \\(int \\*\\) $hex <var_b>"
|
|
gdb_test "print *pointerval" "= 3"
|
|
|
|
# Jakub says: "The intended behavior is that the debug info consumer
|
|
# computes the value of that referenced variable at the current PC,
|
|
# and if it can compute it and pushes the value as a generic type
|
|
# integer into the DWARF stack (it is really only meaningful when
|
|
# referring to integral/pointer typed variables)."
|
|
|
|
gdb_test "print structval" \
|
|
"Type of DW_OP_GNU_variable_value DIE must be an integer or pointer\\."
|
|
|
|
gdb_test "print untypedval" \
|
|
"Type of DW_OP_GNU_variable_value DIE must be an integer or pointer\\."
|
|
|
|
if { [setup_exec 1] == -1 } {
|
|
return -1
|
|
}
|
|
|
|
# DW_OP_GNU_variable_value implementation requires a valid frame.
|
|
if ![runto_main] {
|
|
return -1
|
|
}
|
|
gdb_test "print badval" "value has been optimized out"
|
|
gdb_test "print bad_die_val1" \
|
|
"invalid dwarf2 offset 0xabcdef11"
|
|
gdb_test "print bad_die_val2" \
|
|
"Bad DW_OP_GNU_variable_value DIE\\."
|