1# Copyright 2013-2023 Free Software Foundation, Inc. 2 3# This program is free software; you can redistribute it and/or modify 4# it under the terms of the GNU General Public License as published by 5# the Free Software Foundation; either version 3 of the License, or 6# (at your option) any later version. 7# 8# This program is distributed in the hope that it will be useful, 9# but WITHOUT ANY WARRANTY; without even the implied warranty of 10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11# GNU General Public License for more details. 12# 13# You should have received a copy of the GNU General Public License 14# along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16load_lib dwarf.exp 17 18# This test can only be run on targets which support DWARF-2. 19if {![dwarf2_support]} { 20 return 0 21} 22 23standard_testfile main.c 24 25if { [prepare_for_testing "failed to prepare" "${testfile}" \ 26 [list ${srcfile}]] } { 27 return -1 28} 29 30# Add a .gdb_index section to PROGRAM. 31# PROGRAM is assumed to be the output of standard_output_file. 32# Returns the path of the program or "" if there is a failure. 33# If there is a failure it will have already been logged. 34# Use local prefix to prevent overriding add_gdb_index from lib/gdb.exp. 35 36proc local_add_gdb_index { program } { 37 set index_file ${program}.gdb-index 38 set dir [file dirname ${program}] 39 set filename [file tail ${program}] 40 set dwz $dir/.tmp/${filename}.dwz 41 set dwz_index_file $program.dwz.gdb-index 42 verbose -log "index_file: ${index_file}" 43 remote_file host delete ${index_file} 44 remote_file host delete ${dwz_index_file} 45 gdb_test_no_output "save gdb-index [file dirname ${index_file}]" \ 46 "save gdb-index for file [file tail ${program}]" 47 48 # No point in continuing if generating the index failed. 49 # N.B.: There are times when gdb won't create an index, and it's not a 50 # failure. However, in our case we need an index. So if you find one 51 # not being generated, you'll either have to tweak the .c file or maybe 52 # add a flag to force an index to be generated. 53 if { [remote_file host exists ${index_file}] } { 54 pass "gdb-index file created" 55 } else { 56 fail "gdb-index file created" 57 return "" 58 } 59 60 set program_with_index ${program}.with-index 61 if {[run_on_host "objcopy" [gdb_find_objcopy] "--remove-section .gdb_index --add-section .gdb_index=$index_file --set-section-flags .gdb_index=readonly ${program} ${program_with_index}"]} { 62 return "" 63 } 64 65 with_test_prefix "modify dwz file" { 66 if { [remote_file host exists ${dwz_index_file}] } { 67 # We're modifying $dwz in place, otherwise we'd have to update 68 # .gnu_debugaltlink in $program. 69 set args [join [list "--remove-section .gdb_index" \ 70 " --add-section .gdb_index=$dwz_index_file" \ 71 " --set-section-flags .gdb_index=readonly $dwz"]] 72 if {[run_on_host "objcopy" [gdb_find_objcopy] "$args"]} { 73 return "" 74 } 75 } 76 } 77 78 return ${program_with_index} 79} 80 81# Build a copy of the program with an index (.gdb_index/.debug_names). 82# But only if the toolchain didn't already create one: gdb doesn't support 83# building an index from a program already using one. 84 85set test "check if index present" 86gdb_test_multiple "mt print objfiles ${testfile}" $test { 87 -re "gdb_index.*${gdb_prompt} $" { 88 set binfile_with_index $binfile 89 } 90 -re "debug_names.*${gdb_prompt} $" { 91 set binfile_with_index $binfile 92 } 93 -re "(Psymtabs|Cooked).*${gdb_prompt} $" { 94 set binfile_with_index [local_add_gdb_index $binfile] 95 if { ${binfile_with_index} == "" } { 96 return -1 97 } 98 } 99 -re ".*${gdb_prompt} $" { 100 fail "unrecognized symbol reader" 101 } 102} 103 104# Ok, we have a copy of $binfile with an index. 105# Restart gdb and verify the index was used. 106 107clean_restart ${binfile_with_index} 108gdb_test "mt print objfiles ${testfile}" \ 109 "(gdb_index|debug_names).*" \ 110 "index used" 111 112# Make gdb re-read symbols and see if .gdb_index/.debug_names still 113# gets used. symtab/15885 114 115# There is gdb_touch_execfile, but it doesn't handle remote hosts. 116# Is touch portable enough? 117# First make sure enough time has passed, file mtime resolution is seconds. 118gdb_test_no_output "shell sleep 1" 119if {[run_on_host "touch binary" touch ${binfile_with_index}]} { 120 return -1 121} 122 123if ![runto_main] { 124 return -1 125} 126gdb_test "mt print objfiles ${testfile}" \ 127 "(gdb_index|debug_names).*" \ 128 "index used after symbol reloading" 129