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# Copyright 2013-2022 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/>.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2.
if {![dwarf2_support]} {
return 0
}
standard_testfile main.c
if { [prepare_for_testing "failed to prepare" "${testfile}" \
[list ${srcfile}]] } {
return -1
}
# Add a .gdb_index section to PROGRAM.
# PROGRAM is assumed to be the output of standard_output_file.
# Returns the path of the program or "" if there is a failure.
# If there is a failure it will have already been logged.
# Use local prefix to prevent overriding add_gdb_index from lib/gdb.exp.
proc local_add_gdb_index { program } {
set index_file ${program}.gdb-index
set dir [file dirname ${program}]
set filename [file tail ${program}]
set dwz $dir/.tmp/${filename}.dwz
set dwz_index_file $program.dwz.gdb-index
verbose -log "index_file: ${index_file}"
remote_file host delete ${index_file}
remote_file host delete ${dwz_index_file}
gdb_test_no_output "save gdb-index [file dirname ${index_file}]" \
"save gdb-index for file [file tail ${program}]"
# No point in continuing if generating the index failed.
# N.B.: There are times when gdb won't create an index, and it's not a
# failure. However, in our case we need an index. So if you find one
# not being generated, you'll either have to tweak the .c file or maybe
# add a flag to force an index to be generated.
if { [remote_file host exists ${index_file}] } {
pass "gdb-index file created"
} else {
fail "gdb-index file created"
return ""
}
set program_with_index ${program}.with-index
if {[run_on_host "objcopy" [gdb_find_objcopy] "--remove-section .gdb_index --add-section .gdb_index=$index_file --set-section-flags .gdb_index=readonly ${program} ${program_with_index}"]} {
return ""
}
with_test_prefix "modify dwz file" {
if { [remote_file host exists ${dwz_index_file}] } {
# We're modifying $dwz in place, otherwise we'd have to update
# .gnu_debugaltlink in $program.
set args [join [list "--remove-section .gdb_index" \
" --add-section .gdb_index=$dwz_index_file" \
" --set-section-flags .gdb_index=readonly $dwz"]]
if {[run_on_host "objcopy" [gdb_find_objcopy] "$args"]} {
return ""
}
}
}
return ${program_with_index}
}
# Build a copy of the program with an index (.gdb_index/.debug_names).
# But only if the toolchain didn't already create one: gdb doesn't support
# building an index from a program already using one.
set test "check if index present"
gdb_test_multiple "mt print objfiles ${testfile}" $test {
-re "gdb_index.*${gdb_prompt} $" {
set binfile_with_index $binfile
}
-re "debug_names.*${gdb_prompt} $" {
set binfile_with_index $binfile
}
-re "Psymtabs.*${gdb_prompt} $" {
set binfile_with_index [local_add_gdb_index $binfile]
if { ${binfile_with_index} == "" } {
return -1
}
}
}
# Ok, we have a copy of $binfile with an index.
# Restart gdb and verify the index was used.
clean_restart ${binfile_with_index}
gdb_test "mt print objfiles ${testfile}" \
"(gdb_index|debug_names).*" \
"index used"
# Make gdb re-read symbols and see if .gdb_index/.debug_names still
# gets used. symtab/15885
# There is gdb_touch_execfile, but it doesn't handle remote hosts.
# Is touch portable enough?
# First make sure enough time has passed, file mtime resolution is seconds.
gdb_test_no_output "shell sleep 1"
if {[run_on_host "touch binary" touch ${binfile_with_index}]} {
return -1
}
if ![runto_main] {
return -1
}
gdb_test "mt print objfiles ${testfile}" \
"(gdb_index|debug_names).*" \
"index used after symbol reloading"
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