962effa790
Add tests for the various issues fixed in the previous patches. Add a new "rnglists" procedure to the DWARF assembler, to allow generating .debug_rnglists sections. A trivial change is required to support the DWARF 5 CU header layout. gdb/testsuite/ChangeLog: PR gdb/26813 * lib/dwarf.exp (_handle_DW_FORM): Handle DW_FORM_rnglistx. (cu): Generate header for DWARF 5. (rnglists): New proc. * gdb.dwarf2/rnglists-multiple-cus.exp: New. * gdb.dwarf2/rnglists-sec-offset.exp: New. Change-Id: I5b297e59c370c60cf671dec19796a6c3b9a9f632
102 lines
2.8 KiB
Text
102 lines
2.8 KiB
Text
# 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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# 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_rnglists 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_rnglists 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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if {![dwarf2_support]} {
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return 0
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}
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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 main.c -dw64.S
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set testfile ${testfile}-dw64
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} else {
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standard_testfile main.c -dw32.S
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set testfile ${testfile}-dw32
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}
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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global is_64
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# The CU uses the DW_FORM_rnglistx form to refer to the .debug_rnglists
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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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DW_TAG_compile_unit {
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{DW_AT_ranges 1 DW_FORM_rnglistx}
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{DW_AT_rnglists_base cu_table DW_FORM_sec_offset}
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} {
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# This tests a DW_AT_ranges attribute of form DW_FORM_rnglistx on a
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# function, which was buggy at some point.
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DW_TAG_subprogram {
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{DW_AT_name "foo"}
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{DW_AT_ranges 2 DW_FORM_rnglistx}
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}
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}
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}
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rnglists -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_end 0x1000 0x2000
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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_end 0x2000 0x3000
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}
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# For the CU.
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list_ {
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start_end 0x3000 0x4000
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}
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# For function foo.
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list_ {
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start_end 0x3000 0x3010
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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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# Sanity checks to make sure GDB slurped the symbols correctly.
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gdb_test "p/x &foo" " = 0x3000"
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}
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