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bd360d3048
This adds a test for the commit:
commit 4f180d5396
Date: Fri Feb 21 08:19:21 2020 -0700
Check for null result from gdb_demangle
gdb/testsuite/ChangeLog:
* gdb.dwarf2/cpp-linkage-name.c: New file.
* gdb.dwarf2/cpp-linkage-name.exp: New file.
97 lines
2.6 KiB
Plaintext
97 lines
2.6 KiB
Plaintext
# Copyright 2020 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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# Some compilers give anonymous structures a linkage name, and that
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# linkage name doesn't demangle (within GDB calling gdb_demangle
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# return NULL). At one point this caused GDB to crash due to
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# dereferencing a NULL pointer.
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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 cpp-linkage-name.c cpp-linkage-name-debug.S
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# Set up the DWARF for the test.
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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global srcdir subdir srcfile
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lassign [function_range main ${srcdir}/${subdir}/${srcfile}] \
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main_start main_length
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cu {} {
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DW_TAG_compile_unit {
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{DW_AT_language @DW_LANG_C_plus_plus}
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{DW_AT_name ada-linkage-name.c}
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{DW_AT_comp_dir /tmp}
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} {
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declare_labels a_l b_l
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a_l: DW_TAG_base_type {
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{DW_AT_byte_size 4 DW_FORM_sdata}
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{DW_AT_encoding @DW_ATE_signed}
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{DW_AT_name int}
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}
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# To expose the bug that existed at one point this
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# structure must have a linkage name, but no name, and the
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# linkage name is something that doesn't demangle.
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b_l: DW_TAG_structure_type {
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{DW_AT_byte_size 8 DW_FORM_sdata}
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{DW_AT_encoding @DW_ATE_signed}
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{DW_AT_linkage_name <anon>}
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} {
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member {
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{name x}
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{type :$a_l}
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{data_member_location 0 data1}
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}
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member {
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{name y}
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{type :$a_l}
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{data_member_location 0 data1}
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}
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}
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DW_TAG_subprogram {
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{name "main"}
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{low_pc $main_start addr}
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{high_pc "$main_start + $main_length" addr}
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{type :$a_l}
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}
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DW_TAG_variable {
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{type :$b_l}
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{external 1 flag}
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{DW_AT_name global_var}
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{DW_AT_location {
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DW_OP_addr [gdb_target_symbol global_var]
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} SPECIAL_expr}
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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" ${testfile} \
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[list $srcfile $asm_file] {nodebug}] } {
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return -1
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}
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gdb_assert [runto_main] "run to main"
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gdb_test "p global_var" " = {x = 0, y = 0}"
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