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# Copyright 2024 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/>.
# Create a file with an artificially short (1-byte) build-id, and
# check that GDB doesn't try to load debug information. If we do try
# then we end up loading from: `debug-directory/.build-id/xx/.debug`
# which isn't right.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support
# No remote host testing either.
require {!is_remote host}
standard_testfile main.c
# Create an assembler file which encodes BUILDID as the build-id. Compile
# this along with the global SRCFILE to create a test executable.
#
# Split the debug information out from the newly created executable and place
# it into the debug file directory.
#
# Load the executable into GDB and check to see if the debug information was
# loaded or not. For this test we are expecting that the debug information
# was not loaded. The reason is that, with short values for BUILDID, GDB ends
# up looking for the debug information in weird locations.
proc run_test { buildid } {
set len [string length $buildid]
set asm_file [standard_output_file "$::testfile.$len.S"]
Dwarf::assemble $asm_file {
declare_labels int_label int_label2
upvar buildid buildid
build_id $buildid
cu { label cu_start } {
compile_unit {{language @DW_LANG_C}} {
int_label2: base_type {
{name int}
{byte_size 4 sdata}
{encoding @DW_ATE_signed}
}
constant {
{name the_int}
{type :$int_label2}
{const_value 99 data1}
}
}
}
aranges {} cu_start {
arange {} 0 0
}
}
set execfile [standard_output_file $::testfile.$len]
if { [build_executable_from_specs "failed to build" \
$execfile {debug no-build-id} \
$::srcfile debug \
$asm_file {}] } {
return
}
# Create the debug directory.
set debugdir [standard_output_file "debugdir.$len"]
set build_id_dir $debugdir/.build-id/$buildid
remote_exec host "mkdir -p $build_id_dir"
# Split out the debug information.
if {[gdb_gnu_strip_debug $execfile no-debuglink]} {
unresolved "failed to split out debug information"
return
}
# Move the debug information into the debug directory. We place the debug
# information into a file called just '.debug'. GDB should not check this
# file, but at one point GDB would check this file, even though this
# doesn't make much sense.
set execfile_debug ${execfile}.debug
remote_exec host "mv $execfile_debug $build_id_dir/.debug"
# Start GDB, set the debug-file-directory, and try loading the file.
clean_restart
gdb_test_no_output "set debug-file-directory $debugdir" \
"set debug-file-directory"
gdb_file_cmd $execfile
gdb_assert { $::gdb_file_cmd_debug_info eq "nodebug" } \
"no debug should be loaded"
# For sanity, read something that was encoded in the debug
# information, this should fail.
gdb_test "print the_int" \
"(?:No symbol table is loaded|No symbol \"the_int\" in current context).*"
}
foreach_with_prefix buildid { a4 "" } {
run_test $buildid
}
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