xref: /netbsd-src/external/gpl3/gdb.old/dist/gdb/testsuite/gdb.python/py-lazy-string.exp (revision 6881a4007f077b54e5f51159c52b9b25f57deb0d)
1# Copyright (C) 2015-2023 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
16# This file is part of the GDB testsuite.  It tests lazy string support
17# not tested by py-prettyprinter.exp.
18
19load_lib gdb-python.exp
20
21standard_testfile
22
23if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
24    return -1
25}
26
27# Skip all tests if Python scripting is not enabled.
28if { [skip_python_tests] } { continue }
29
30if ![runto_main ] {
31    return -1
32}
33
34gdb_breakpoint [gdb_get_line_number "break here"]
35gdb_continue_to_breakpoint "break here"
36
37gdb_py_test_silent_cmd "python null = gdb.parse_and_eval(\"null\")" "get null value" 1
38
39gdb_py_test_silent_cmd "python nullstr = null.lazy_string(length=0)" "create a null lazy string" 1
40gdb_test "python print (nullstr.length)" "0" "null lazy string length"
41gdb_test "python print (nullstr.address)" "0" "null lazy string address"
42gdb_test "python print (nullstr.type)" "const char \\*" "null lazy string type"
43gdb_test "python print(nullstr.value())" \
44    "gdb.MemoryError: Cannot create a value from NULL.*Error while executing Python code." \
45    "create value from NULL"
46gdb_test "python print(null.lazy_string(length=3).value())" \
47    "gdb.MemoryError: Cannot create a lazy string with address 0x0, and a non-zero length.*Error while executing Python code." \
48    "null lazy string with non-zero length"
49gdb_test "python print(null.lazy_string(length=-2))" \
50    "ValueError: Invalid length.*Error while executing Python code." \
51    "bad length"
52
53foreach var_spec { { "ptr" "pointer" "const char \\*" -1 } \
54		   { "array" "array" "const char \\[6\\]" 6 } \
55		   { "typedef_ptr" "typedef pointer" "pointer" -1 } } {
56    set var [lindex $var_spec 0]
57    set value [lindex $var_spec 1]
58    set type [lindex $var_spec 2]
59    set length [lindex $var_spec 3]
60    with_test_prefix $var {
61	gdb_test "print $var" "\"$value\""
62	gdb_py_test_silent_cmd "python $var = gdb.history (0)" "get value from history" 1
63	gdb_py_test_silent_cmd "python l$var = $var.lazy_string()" "acquire lazy string" 1
64	gdb_test "python print ($var.type)" "$type" "string type name equality"
65	gdb_test "python print (l$var.type)" "$type" "lazy-string type name equality"
66	gdb_test "python print (l$var.length)" "$length" "lazy string length"
67	gdb_test "python print (l$var.value())" "\"$value\"" "lazy string value"
68	gdb_py_test_silent_cmd "python l2$var = $var.lazy_string(length=2)" "acquire lazy string, length 2" 1
69	gdb_test "python print (l2$var.length)" "2" "lazy string length 2"
70	gdb_test "python print (l2$var.value())" "\"[string range $value 0 1]\"" "lazy string length 2 value"
71	# This test will have to wait until gdb can handle it. There's no way,
72	# currently, to internally specify an array of length zero in the C
73	# language support.  PR 20786
74	#gdb_test "python print ($var.lazy_string(length=0).value())" "\"\"" "empty lazy string value"
75    }
76}
77