146 lines
3.9 KiB
Text
146 lines
3.9 KiB
Text
# Copyright 2020-2023 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 to reproduce the crash described in PR 26813.
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#
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# When reading a list in any table in the .debug_loclists section, GDB would
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# read the header at offset 0 in the section (the header of the first table).
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# When the index of the list we read was greater than the number of lists of
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# the first table, GDB would erroneously report that the index is invalid.
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#
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# So this test creates a .debug_loclists section with two tables. The second
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# table has more lists than the first one and we try to read a high index in
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# the second table.
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load_lib dwarf.exp
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require dwarf2_support
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# Test with 32-bit and 64-bit DWARF.
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foreach_with_prefix is_64 {false true} {
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if { $is_64 } {
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standard_testfile .c -dw64.S
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set testfile ${testfile}-dw64
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} else {
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standard_testfile .c -dw32.S
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set testfile ${testfile}-dw32
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}
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# Get the addresses / lengths of func1 and func2.
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lassign [function_range func1 $srcdir/$subdir/$srcfile] func1_addr func1_len
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lassign [function_range func2 $srcdir/$subdir/$srcfile] func2_addr func2_len
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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global func1_addr func1_len
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global func2_addr func2_len
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global is_64
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# The CU uses the DW_FORM_loclistx form to refer to the .debug_loclists
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# section.
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cu {
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version 5
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is_64 $is_64
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} {
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declare_labels int_type
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DW_TAG_compile_unit {
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{DW_AT_loclists_base cu_table DW_FORM_sec_offset}
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} {
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int_type: DW_TAG_base_type {
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{DW_AT_byte_size 4 DW_FORM_data1}
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{DW_AT_encoding @DW_ATE_signed}
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{DW_AT_name "int"}
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}
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DW_TAG_variable {
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{DW_AT_name "foo"}
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{DW_AT_location 1 DW_FORM_loclistx}
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{DW_AT_type :$int_type}
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}
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DW_TAG_subprogram {
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{DW_AT_name "func1"}
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{DW_AT_low_pc $func1_addr}
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{DW_AT_high_pc $func1_len DW_FORM_udata}
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}
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DW_TAG_subprogram {
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{DW_AT_name "func2"}
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{DW_AT_low_pc $func2_addr}
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{DW_AT_high_pc $func2_len DW_FORM_udata}
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}
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}
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}
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loclists {is-64 $is_64} {
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# This table is unused, but exists so that the used table is not at
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# the beginning of the section.
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table {} {
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list_ {
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start_length 0x1000 0x1000 { DW_OP_addr 0x100000 }
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}
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}
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# The lists in this table are accessed by index (DW_FORM_rnglistx).
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table {post-header-label cu_table} {
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# This list is unused, but exists to offset the next ones.
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list_ {
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start_length 0x1000 0x1000 { DW_OP_addr 0x100000 }
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}
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# For variable foo.
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list_ {
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# This should not affect the following addresses.
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base_address 0xffff
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# When in func1.
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start_length $func1_addr $func1_len {
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DW_OP_constu 0x123456
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DW_OP_stack_value
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}
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# When in func2.
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start_length $func2_addr $func2_len {
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DW_OP_constu 0x234567
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DW_OP_stack_value
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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" ${testfile} \
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[list $srcfile $asm_file] {nodebug}] } {
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return -1
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}
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if { ![runto_main] } {
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return
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}
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gdb_breakpoint "func1"
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gdb_breakpoint "func2"
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gdb_continue_to_breakpoint "func1"
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with_test_prefix "at func1" {
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gdb_test "print /x foo" " = 0x123456"
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}
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gdb_continue_to_breakpoint "func2"
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with_test_prefix "at func2" {
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gdb_test "print /x foo" " = 0x234567"
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}
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}
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