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When reading an exec with a .debug_line section containing a vendor-specific extended opcode, we get: ... $ gdb -batch -iex "set complaints 10" dw2-vendor-extended-opcode During symbol reading: mangled .debug_line section ... and reading of the .debug_line section is abandoned. The vendor-specific extended opcode should be ignored, as specified in the DWARF standard (7.1 Vendor Extensibility). [ FWIW, vendor-specific standard opcodes are already ignored. ] Fix this by ignoring all vendor-specific extended opcodes. Build and tested on x86_64-linux. gdb/ChangeLog: 2020-08-03 Tom de Vries <tdevries@suse.de> PR symtab/26333 * dwarf2/read.c (dwarf_decode_lines_1): Ignore DW_LNE_lo_user/DW_LNE_hi_user range. gdb/testsuite/ChangeLog: 2020-08-03 Tom de Vries <tdevries@suse.de> PR symtab/26333 * lib/dwarf.exp (DW_LNE_user): New proc. * gdb.dwarf2/dw2-vendor-extended-opcode.c: New test. * gdb.dwarf2/dw2-vendor-extended-opcode.exp: New file.
82 lines
2.0 KiB
Plaintext
82 lines
2.0 KiB
Plaintext
# 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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load_lib dwarf.exp
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# This test can only be run on targets which support DWARF-2 and use gas.
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if {![dwarf2_support]} {
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verbose "Skipping dw2-vendor-extended-opcode test."
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return 0
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}
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# The .c files use __attribute__.
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if [get_compiler_info] {
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return -1
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}
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if !$gcc_compiled {
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verbose "Skipping dw2-vendor-extended-opcode test."
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return 0
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}
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standard_testfile dw2-vendor-extended-opcode.c dw2-vendor-extended-opcode-dw.S
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set asm_file [standard_output_file $srcfile2]
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Dwarf::assemble $asm_file {
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declare_labels Llines
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global srcdir subdir srcfile
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set DW_LNE_lo_usr 0x80
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set DW_LNE_hi_usr 0xff
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cu {} {
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compile_unit {
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{language @DW_LANG_C}
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{name dw2-vendor-extended-opcode.c}
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{stmt_list $Llines DW_FORM_sec_offset}
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} {
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subprogram {
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{external 1 flag}
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{MACRO_AT_func {main}}
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}
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}
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}
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lines {version 2} Llines {
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include_dir "${srcdir}/${subdir}"
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file_name "$srcfile" 1
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program {
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{DW_LNE_set_address main_label}
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{line 27}
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{DW_LNE_user 1 $DW_LNE_lo_usr}
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{DW_LNE_user 2 $DW_LNE_hi_usr}
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{DW_LNS_copy}
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{DW_LNE_set_address main_label_2}
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{DW_LNE_end_sequence}
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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 $asm_file] {nodebug}] } {
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return -1
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}
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if ![runto_main] {
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return -1
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}
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gdb_breakpoint "$srcfile:27" message
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