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Starting with (future) Clang 15 (since https://reviews.llvm.org/D120989), Clang emits the DWARF information of global alias variables as DW_TAG_imported_declaration. However, GDB does not handle it. It incorrectly always reads this tag as C++/Fortran imported declaration (type alias, namespace alias and Fortran module). This commit adds support to handle this tag as an alias variable. This change fixes the failures in the gdb.base/symbol-alias.exp testcase with current git Clang. This testcase is also updated to test nested (recursive) aliases.
94 lines
2.6 KiB
Plaintext
94 lines
2.6 KiB
Plaintext
# Test for printing alias symbols.
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# Copyright 2017-2022 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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standard_testfile symbol-alias.c symbol-alias2.c
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# Clang versions prior to v15 do not emit debug info for aliases.
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set old_clang [expr [test_compiler_info {clang-1[0-4]-*-*}] \
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|| [test_compiler_info {clang-[1-9]-*}]]
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if { [prepare_for_testing "failed to prepare" ${testfile} [list $srcfile $srcfile2]] } {
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return -1
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}
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if ![runto_main] then {
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return
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}
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# Functions.
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foreach f {"func" "func_alias"} {
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gdb_test "p $f" " = {(struct )?S \\*\\(void\\)} $hex <func(\\(\\))?>"
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gdb_test "p *${f}()" "= {field1 = 1, field2 = 2}"
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}
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# Extern global variable.
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gdb_test "p g_var_s" "= {field1 = 1, field2 = 2}"
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foreach v {"g_var_s_alias" "g_var_s_alias2"} {
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gdb_test_multiple "p $v" "print alias variable $v" {
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-re -wrap " = {field1 = 1, field2 = 2}" {
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pass $gdb_test_name
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}
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-re -wrap "has unknown type; cast it to its declared type" {
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if { $old_clang } {
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xfail $gdb_test_name
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} else {
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fail $gdb_test_name
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}
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}
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}
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}
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# Static global variable.
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gdb_test "p g_var" " = 1"
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gdb_test_multiple "p g_var_alias" "print alias of static variable" {
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-re -wrap " = 1" {
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pass $gdb_test_name
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}
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-re -wrap "has unknown type; cast it to its declared type" {
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if { $old_clang } {
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xfail $gdb_test_name
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} else {
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fail $gdb_test_name
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}
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}
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}
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# Alias of a variable that is declared later in the scope.
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gdb_test "p g_def_var" " = 2"
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gdb_test_multiple "p g_def_var_alias" "print g_def_var_alias" {
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-re -wrap " = 2" {
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pass $gdb_test_name
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}
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-re -wrap "has unknown type; cast it to its declared type" {
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if { $old_clang } {
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xfail $gdb_test_name
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} else {
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fail $gdb_test_name
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}
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}
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}
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gdb_test_multiple "p g_def_var_alias2" "print g_def_var_alias2" {
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-re -wrap " = 2" {
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pass $gdb_test_name
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}
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-re -wrap "has unknown type; cast it to its declared type" {
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if { $old_clang } {
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xfail $gdb_test_name
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} else {
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fail $gdb_test_name
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}
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}
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}
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