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When running gdb.base/vla-ptr.exp with clang-10, we run into this FAIL:
...
(gdb) print td_vla^M
$6 = 0x7fffffffd2b0^M
(gdb) FAIL: gdb.base/vla-ptr.exp: print td_vla
...
Clang 10.0.1 generates the following DWARF for td_vla. A variable DIE:
...
<2><19f>: Abbrev Number: 6 (DW_TAG_variable)
<1a0> DW_AT_location : 0x39 (location list)
<1a4> DW_AT_name : td_vla
<1aa> DW_AT_type : <0x1ae>
....
with typedef type:
...
<2><1ae>: Abbrev Number: 7 (DW_TAG_typedef)
<1af> DW_AT_type : <0x1fc>
<1b3> DW_AT_name : typedef_vla
...
pointing to:
...
<1><1fc>: Abbrev Number: 11 (DW_TAG_array_type)
<1fd> DW_AT_type : <0x1d3>
<2><201>: Abbrev Number: 14 (DW_TAG_subrange_type)
<202> DW_AT_type : <0x1f5>
...
The subrange type is missing the count attribute. This was filed as
llvm PR48247 - "vla var with typedef'd type has incomplete debug info".
Mark this as xfail.
gdb/testsuite/ChangeLog:
2020-11-21 Tom de Vries <tdevries@suse.de>
* gdb.base/vla-ptr.exp: Add XFAIL.
80 lines
2.7 KiB
Plaintext
80 lines
2.7 KiB
Plaintext
# Copyright 2014-2020 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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standard_testfile
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set using_clang [test_compiler_info clang*]
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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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if ![runto_main] {
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return -1
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}
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set sizeof_int [get_sizeof "int" 4]
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# Check that VLA passed to function (pointer) points to the first element.
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gdb_breakpoint [gdb_get_line_number "foo_bp"]
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gdb_continue_to_breakpoint "foo_bp"
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gdb_test "print vla_ptr" "\\\(int \\\*\\\) $hex" "print vla_ptr (foo)"
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gdb_test "print *vla_ptr" " = 2" "print *vla_ptr (foo)"
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gdb_breakpoint [gdb_get_line_number "bar_bp"]
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gdb_continue_to_breakpoint "bar_bp"
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gdb_test "print vla_ptr" "\\\(int \\\*\\\) $hex" "print vla_ptr (bar)"
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gdb_test "print *vla_ptr" " = 2" "print *vla_ptr (bar)"
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gdb_breakpoint [gdb_get_line_number "vla_func_bp"]
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gdb_continue_to_breakpoint "vla_func_bp"
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gdb_test_multiple "print td_vla" "" {
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-re -wrap " = \\\{4, 5, 6, 7, 8\\\}" {
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pass $gdb_test_name
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}
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-re -wrap " = $hex" {
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if { $using_clang } {
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# Clang 10.0.1 fails to generate complete type info, filed as
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# llvm PR48247 - "vla var with typedef'd type has incomplete
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# debug info". See note below.
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xfail $gdb_test_name
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# Verify that despite the incomplete type info, the variable is
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# there and has the right value.
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gdb_test "p *td_vla@5" " = \\\{4, 5, 6, 7, 8\\\}"
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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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# Clang 10.0.1 generates this DWARF for td_vla:
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#
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# A variable DIE:
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# <2><19f>: Abbrev Number: 6 (DW_TAG_variable)
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# <1a0> DW_AT_location : 0x39 (location list)
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# <1a4> DW_AT_name : td_vla
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# <1aa> DW_AT_type : <0x1ae>
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# with type:
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# <2><1ae>: Abbrev Number: 7 (DW_TAG_typedef)
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# <1af> DW_AT_type : <0x1fc>
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# <1b3> DW_AT_name : typedef_vla
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# pointing to:
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# <1><1fc>: Abbrev Number: 11 (DW_TAG_array_type)
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# <1fd> DW_AT_type : <0x1d3>
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# <2><201>: Abbrev Number: 14 (DW_TAG_subrange_type)
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# <202> DW_AT_type : <0x1f5>
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#
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# The subrange type is missing the count attribute.
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