| # Copyright 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 to reproduce the crash described in PR 26813. |
| # |
| # When reading a list in any table in the .debug_loclists section, GDB would |
| # read the header at offset 0 in the section (the header of the first table). |
| # When the index of the list we read was greater than the number of lists of |
| # the first table, GDB would erroneously report that the index is invalid. |
| # |
| # So this test creates a .debug_loclists section with two tables. The second |
| # table has more lists than the first one and we try to read a high index in |
| # the second table. |
| |
| load_lib dwarf.exp |
| |
| if {![dwarf2_support]} { |
| return 0 |
| } |
| |
| # Test with 32-bit and 64-bit DWARF. |
| foreach_with_prefix is_64 {false true} { |
| if { $is_64 } { |
| standard_testfile .c -dw64.S |
| set testfile ${testfile}-dw64 |
| } else { |
| standard_testfile .c -dw32.S |
| set testfile ${testfile}-dw32 |
| } |
| |
| # Get the addresses / lengths of func1 and func2. |
| lassign [function_range func1 $srcdir/$subdir/$srcfile] func1_addr func1_len |
| lassign [function_range func2 $srcdir/$subdir/$srcfile] func2_addr func2_len |
| |
| set asm_file [standard_output_file $srcfile2] |
| Dwarf::assemble $asm_file { |
| global func1_addr func1_len |
| global func2_addr func2_len |
| global is_64 |
| |
| # The CU uses the DW_FORM_loclistx form to refer to the .debug_loclists |
| # section. |
| cu { |
| version 5 |
| is_64 $is_64 |
| } { |
| declare_labels int_type |
| |
| DW_TAG_compile_unit { |
| {DW_AT_loclists_base cu_table DW_FORM_sec_offset} |
| } { |
| int_type: DW_TAG_base_type { |
| {DW_AT_byte_size 4 DW_FORM_data1} |
| {DW_AT_encoding @DW_ATE_signed} |
| {DW_AT_name "int"} |
| } |
| |
| DW_TAG_variable { |
| {DW_AT_name "foo"} |
| {DW_AT_location 1 DW_FORM_loclistx} |
| {DW_AT_type :$int_type} |
| } |
| |
| DW_TAG_subprogram { |
| {DW_AT_name "func1"} |
| {DW_AT_low_pc $func1_addr} |
| {DW_AT_high_pc $func1_len DW_FORM_udata} |
| } |
| |
| DW_TAG_subprogram { |
| {DW_AT_name "func2"} |
| {DW_AT_low_pc $func2_addr} |
| {DW_AT_high_pc $func2_len DW_FORM_udata} |
| } |
| } |
| } |
| |
| loclists {is-64 $is_64} { |
| # This table is unused, but exists so that the used table is not at |
| # the beginning of the section. |
| table {} { |
| list_ { |
| start_length 0x1000 0x1000 { DW_OP_addr 0x100000 } |
| } |
| } |
| |
| # The lists in this table are accessed by index (DW_FORM_rnglistx). |
| table {post-header-label cu_table} { |
| # This list is unused, but exists to offset the next ones. |
| list_ { |
| start_length 0x1000 0x1000 { DW_OP_addr 0x100000 } |
| } |
| |
| # For variable foo. |
| list_ { |
| # When in func1. |
| start_length $func1_addr $func1_len { |
| DW_OP_constu 0x123456 |
| DW_OP_stack_value |
| } |
| |
| # When in func2. |
| start_length $func2_addr $func2_len { |
| DW_OP_constu 0x234567 |
| DW_OP_stack_value |
| } |
| } |
| } |
| } |
| } |
| |
| if { [prepare_for_testing "failed to prepare" ${testfile} \ |
| [list $srcfile $asm_file] {nodebug}] } { |
| return -1 |
| } |
| |
| if { ![runto_main] } { |
| return |
| } |
| |
| gdb_breakpoint "func1" |
| gdb_breakpoint "func2" |
| |
| gdb_continue_to_breakpoint "func1" |
| with_test_prefix "at func1" { |
| gdb_test "print /x foo" " = 0x123456" |
| } |
| |
| gdb_continue_to_breakpoint "func2" |
| with_test_prefix "at func2" { |
| gdb_test "print /x foo" " = 0x234567" |
| } |
| } |