194 lines
5.6 KiB
Plaintext
194 lines
5.6 KiB
Plaintext
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# Copyright 2018 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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# This test checks that the index-cache feature generates the expected files at
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# the expected location.
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standard_testfile
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if { [prepare_for_testing "failed to prepare" $testfile $srcfile] } {
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return
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}
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# List the files in DIR on the host (where GDB-under-test runs).
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# Return a list of two elements:
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# - 0 on success, -1 on failure
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# - the list of files on success, empty on failure
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proc ls_host { dir } {
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lassign [remote_exec host ls "-1 $dir"] ret output
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if { $ret != 0 } {
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fail "failed to list files on host in $dir"
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return -1
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}
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# ls -1 returns a list separated by \r\n. split will return a bunch of
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# empty entries (it treats a sequence of split characters as separate
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# fields, plus there is a \r\n at the end of the result). Ignore empty
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# list elements.
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set filtered {}
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set files [split $output \r\n]
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foreach file $files {
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if { $file != "" } {
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lappend filtered $file
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}
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}
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return "0 $filtered"
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}
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# Execute "show index-cache stats" and verify the output against expected
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# values.
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proc check_cache_stats { expected_hits expected_misses } {
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set re [multi_line \
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" Cache hits .this session.: $expected_hits" \
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"Cache misses .this session.: $expected_misses" \
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]
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gdb_test "show index-cache stats" $re "check index-cache stats"
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}
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# Run CODE using a fresh GDB configured based on the other parameters.
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proc run_test_with_flags { cache_dir cache_enabled code } {
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global GDBFLAGS testfile
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save_vars { GDBFLAGS } {
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set GDBFLAGS "$GDBFLAGS -iex \"set index-cache directory $cache_dir\""
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set GDBFLAGS "$GDBFLAGS -iex \"set index-cache $cache_enabled\""
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clean_restart ${testfile}
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uplevel 1 $code
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}
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}
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# Test administrative stuff.
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proc_with_prefix test_basic_stuff { } {
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global testfile
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clean_restart ${testfile}
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# Check that the index cache is disabled by default.
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gdb_test \
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"show index-cache" \
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" is currently disabled." \
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"index-cache is disabled by default"
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# Test that we can enable it and "show index-cache" reflects that.
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gdb_test_no_output "set index-cache on" "enable index cache"
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gdb_test \
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"show index-cache" \
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" is currently enabled." \
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"index-cache is now enabled"
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# Test the "set/show index-cache directory" commands.
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gdb_test "set index-cache directory" "Argument required.*" "set index-cache directory without arg"
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gdb_test_no_output "set index-cache directory /tmp" "change the index cache directory"
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gdb_test \
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"show index-cache directory" \
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"The directory of the index cache is \"/tmp\"." \
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"show index cache directory"
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}
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# Test loading a binary with the cache disabled. No file should be created.
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proc_with_prefix test_cache_disabled { cache_dir } {
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lassign [ls_host $cache_dir] ret files_before
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run_test_with_flags $cache_dir off {
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lassign [ls_host $cache_dir] ret files_after
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set nfiles_created [expr [llength $files_after] - [llength $files_before]]
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gdb_assert "$nfiles_created == 0" "no files were created"
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check_cache_stats 0 0
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}
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}
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# Test with the cache enabled, we expect to have exactly one file created.
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proc_with_prefix test_cache_enabled_miss { cache_dir } {
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global testfile
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lassign [ls_host $cache_dir] ret files_before
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run_test_with_flags $cache_dir on {
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lassign [ls_host $cache_dir] ret files_after
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set nfiles_created [expr [llength $files_after] - [llength $files_before]]
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gdb_assert "$nfiles_created > 0" "at least one file was created"
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set build_id [get_build_id [standard_output_file ${testfile}]]
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if { $build_id == "" } {
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fail "couldn't get executable build id"
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return
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}
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set expected_created_file [list "${build_id}.gdb-index"]
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set found_idx [lsearch -exact $files_after $expected_created_file]
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gdb_assert "$found_idx >= 0" "expected file is there"
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remote_exec host rm "-f $cache_dir/$expected_created_file"
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check_cache_stats 0 1
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}
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}
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# Test with the cache enabled, this time we should have one file (the
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# same), but one cache read hit.
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proc_with_prefix test_cache_enabled_hit { cache_dir } {
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# Just to populate the cache.
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run_test_with_flags $cache_dir on {}
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lassign [ls_host $cache_dir] ret files_before
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run_test_with_flags $cache_dir on {
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lassign [ls_host $cache_dir] ret files_after
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set nfiles_created [expr [llength $files_after] - [llength $files_before]]
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gdb_assert "$nfiles_created == 0" "no files were created"
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check_cache_stats 1 0
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}
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}
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test_basic_stuff
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# The cache dir should be on the host (possibly remote), so we can't use the
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# standard output directory for that (it's on the build machine).
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lassign [remote_exec host mktemp -d] ret cache_dir
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if { $ret != 0 } {
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fail "couldn't create temporary cache dir"
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return
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}
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# The ouput of mktemp contains an end of line, remove it.
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set cache_dir [string trimright $cache_dir \r\n]
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test_cache_disabled $cache_dir
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test_cache_enabled_miss $cache_dir
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test_cache_enabled_hit $cache_dir
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# Test again with the cache disabled, now that it is populated.
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test_cache_disabled $cache_dir
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