1# Copyright (C) 2016-2020 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
16standard_testfile
17
18if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
19    return -1
20}
21
22if ![runto_main] then {
23    fail "can't run to main"
24    return 0
25}
26
27# Run "show max-value-size" and return the interesting bit of the
28# result.  This is either the maximum size in bytes, or the string
29# "unlimited".
30proc get_max_value_size {} {
31    global gdb_prompt
32    global decimal
33
34    gdb_test_multiple "show max-value-size" "" {
35	-re "Maximum value size is ($decimal) bytes.*$gdb_prompt $" {
36	    return $expect_out(1,string)
37	}
38	-re "Maximum value size is unlimited.*$gdb_prompt $" {
39	    return "unlimited"
40	}
41    }
42}
43
44# Assuming that MAX_VALUE_SIZE is the current value for
45# max-value-size, print the test values.  Use TEST_PREFIX to make the
46# test names unique.
47proc do_value_printing { max_value_size test_prefix } {
48    with_test_prefix ${test_prefix} {
49	gdb_test "p/d one" " = 0"
50	if { $max_value_size != "unlimited" && $max_value_size < 100 } then {
51	    gdb_test "p/d one_hundred" \
52		"value requires 100 bytes, which is more than max-value-size"
53	} else {
54	    gdb_test "p/d one_hundred" " = \\{0 <repeats 100 times>\\}"
55	}
56	gdb_test "p/d one_hundred \[99\]" " = 0"
57    }
58}
59
60# Install SET_VALUE as the value for max-value-size, then print the
61# test values.
62proc set_and_check_max_value_size { set_value } {
63    if { $set_value == "unlimited" } then {
64	set check_pattern "unlimited"
65    } else {
66	set check_pattern "${set_value} bytes"
67    }
68
69    gdb_test_no_output "set max-value-size ${set_value}"
70    gdb_test "show max-value-size" \
71	"Maximum value size is ${check_pattern}." \
72	"check that the value shows as ${check_pattern}"
73
74    do_value_printing ${set_value} "max-value-size is '${set_value}'"
75}
76
77# Check the default value is sufficient.
78do_value_printing [get_max_value_size] "using initial max-value-size"
79
80# Check some values for max-value-size that should prevent some
81# allocations.
82set_and_check_max_value_size 25
83set_and_check_max_value_size 99
84
85# Check values for max-value-size that should allow all allocations.
86set_and_check_max_value_size 100
87set_and_check_max_value_size 200
88set_and_check_max_value_size "unlimited"
89
90# Check that we can't set the maximum size stupidly low.
91gdb_test "set max-value-size 1" \
92    "max-value-size set too low, increasing to \[0-9\]+ bytes"
93gdb_test "set max-value-size 0" \
94    "max-value-size set too low, increasing to \[0-9\]+ bytes"
95gdb_test "set max-value-size -5" \
96    "only -1 is allowed to set as unlimited"
97