forked from Imagelibrary/binutils-gdb
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
113 lines
3.6 KiB
Plaintext
113 lines
3.6 KiB
Plaintext
# Copyright 2016-2024 Free Software Foundation, Inc.
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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 a C++ reference marked with DW_OP_GNU_implicit_pointer.
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# The referenced value is a DW_AT_const_value.
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require allow_cplus_tests
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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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require dwarf2_support
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# We'll place the output of Dwarf::assemble in implref-const.S.
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standard_testfile main.c .S
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# ${testfile} is now "implref-const". srcfile2 is "implref-const.S".
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set executable ${testfile}
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set asm_file [standard_output_file ${srcfile2}]
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# We need to know the size of integer and address types in order
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# to write some of the debugging info we'd like to generate.
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#
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# For that, we ask GDB by debugging our implref-const program.
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# Any program would do, but since we already have implref-const
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# specifically for this testcase, might as well use that.
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if [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] {
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return -1
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}
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# Create the DWARF. We need a regular variable and a reference to it that'll
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# be marked with DW_OP_GNU_implicit_pointer.
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Dwarf::assemble ${asm_file} {
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cu {} {
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DW_TAG_compile_unit {
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{DW_AT_language @DW_LANG_C_plus_plus}
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} {
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declare_labels int_label const_label variable_label ref_label
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set int_size [get_sizeof "int" -1]
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# gdb always assumes references are implemented as pointers.
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set addr_size [get_sizeof "void *" -1]
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set var_value 42
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int_label: DW_TAG_base_type {
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{DW_AT_byte_size ${int_size} DW_FORM_udata}
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{DW_AT_encoding @DW_ATE_signed}
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{DW_AT_name "int"}
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}
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ref_label: DW_TAG_reference_type {
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{DW_AT_byte_size ${addr_size} DW_FORM_udata}
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{DW_AT_type :${int_label}}
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}
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const_label: DW_TAG_const_type {
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{DW_AT_type :${ref_label}}
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}
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DW_TAG_subprogram {
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{MACRO_AT_func { "main" }}
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{DW_AT_type :${int_label}}
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{DW_AT_external 1 DW_FORM_flag}
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} {
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variable_label: DW_TAG_variable {
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{DW_AT_name "var"}
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{DW_AT_type :${int_label}}
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{DW_AT_const_value ${var_value} DW_FORM_udata}
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}
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DW_TAG_variable {
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{DW_AT_name "ref"}
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{DW_AT_type :${const_label}}
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{DW_AT_location {DW_OP_GNU_implicit_pointer ${variable_label} 0} SPECIAL_expr}
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}
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}
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}
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}
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}
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if [prepare_for_testing "failed to prepare" ${executable} [list ${asm_file} ${srcfile}] {}] {
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return -1
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}
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# DW_OP_GNU_implicit_pointer implementation requires a valid frame.
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if ![runto_main] {
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return -1
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}
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# Doing 'print ref' should show us e.g. '(int &) <synthetic pointer>: 42'.
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gdb_test "print ref" " = \\(int &\\) <synthetic pointer>: \\\d+"
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# The variable isn't located in memory, thus we can't take its address.
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gdb_test "print &var" "Can't take address of \"var\" which isn't an lvalue."
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gdb_test "print &ref" "Attempt to take address of value not located in memory."
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# gdb assumes C++ references are implemented as pointers, and print &(&ref)
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# shows us the underlying pointer's address.
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# Since in this case there's no physical pointer, gdb should tell us so.
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gdb_test "print &(&ref)" "Attempt to take address of value not located in memory."
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