1 # Copyright 2018 Free Software Foundation, Inc.
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.
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.
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/>.
16 # When caching a proc using gdb_caching_proc, it will become less likely to
17 # be executed, and consequently it's going to be harder to detect that the
18 # proc is racy. OTOH, in general the proc is easy to rerun. So, run all
19 # uncached gdb_caching_procs a number of times and detect inconsistent results.
20 # The purpose of caching is to reduce runtime, so rerunning is somewhat
21 # counter-productive in that aspect, but it's better than uncached, because the
22 # number of reruns is constant-bounded, and the increase in runtime is bound to
23 # this test-case, and could be disabled on slow targets.
25 # Test gdb_caching_proc NAME
26 proc test_proc { name } {
27 set real_name gdb_real__$name
31 set first [$real_name]
32 lappend resultlist $first
34 # Ten repetitions was enough to trigger target_supports_scheduler_locking,
35 # and costs about 20 seconds on an i7-6600U.
39 for {set i 0} {$i < $repeat} {incr i} {
40 set rerun [$real_name]
41 lappend resultlist $rerun
42 if { $rerun != $first } {
48 pass "$name consistency"
50 fail "$name consistency"
51 verbose -log "$name: $resultlist"
55 # Test gdb_caching_procs in FILE
56 proc test_file { file } {
61 while { [gets $fp line] >= 0 } {
62 if [regexp -- "^gdb_caching_proc \[ \t\]*(\[^ \t\]*)" $line \
64 lappend procnames $procname
69 if { [llength $procnames] == 0 } {
73 if { [file tail $file] == "gdb.exp" } {
76 load_lib [file tail $file]
79 foreach procname $procnames {
81 "is_address_zero_readable" { set setup_gdb 1 }
82 "target_is_gdbserver" { set setup_gdb 1 }
83 default {set setup_gdb 0 }
99 set me "gdb_caching_proc"
100 set src { int main() { return 0; } }
101 if { ![gdb_simple_compile $me $src executable] } {
105 # Test gdb_caching_procs in gdb/testsuite/lib/*.exp
106 set files [eval glob -types f $srcdir/lib/*.exp]
107 foreach file $files {
112 remote_file build delete $obj