gdb/testsuite/gdb.guile/scm-lazy-string.exp

   1 # Copyright (C) 2008-2020 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
  16 # This file is part of the GDB testsuite.
  17 # It tests the mechanism exposing lazy strings to Guile.
  18
  19 load_lib gdb-guile.exp
  20
  21 standard_testfile
  22
  23 if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
  24     return
  25 }
  26
  27 # Skip all tests if Guile scripting is not enabled.
  28 if { [skip_guile_tests] } { continue }
  29
  30 #gdb_install_guile_utils
  31 #gdb_install_guile_module
  32
  33 # The following tests require execution.
  34
  35 if ![gdb_guile_runto_main] {
  36     fail "can't run to main"
  37     return
  38 }
  39
  40 gdb_breakpoint [gdb_get_line_number "break here"]
  41 gdb_continue_to_breakpoint "break here"
  42
  43 gdb_scm_test_silent_cmd "gu (define null (parse-and-eval \"null\"))" 1
  44
  45 gdb_scm_test_silent_cmd "gu (define nullstr (value->lazy-string null #:length 0))" "create a null lazy string" 1
  46 gdb_test "gu (print (lazy-string-length nullstr))" "= 0" "null lazy string length"
  47 gdb_test "gu (print (lazy-string-address nullstr))" "= 0" "null lazy string address"
  48 gdb_test "gu (print (lazy-string-type nullstr))" "const char \\*" "null lazy string type"
  49 gdb_test "gu (print (lazy-string->value nullstr))" \
  50     "Out of range: cannot create a value from NULL.*Error while executing Scheme code." \
  51     "create value from NULL"
  52 gdb_test "gu (print (lazy-string->value (value->lazy-string null #:length 3)))" \
  53     "Out of range: cannot create a lazy string with address 0x0, and a non-zero length.*Error while executing Scheme code." \
  54     "null lazy string with non-zero length"
  55 gdb_test "gu (print (value->lazy-string null #:length -2))" \
  56     "Out of range: invalid length.*Error while executing Scheme code." \
  57     "bad length"
  58
  59 foreach var_spec { { "ptr" "pointer" "const char \\*" -1 } \
  60                    { "array" "array" "const char \\[6\\]" 6 } \
  61                    { "typedef_ptr" "typedef pointer" "pointer" -1 } } {
  62     set var [lindex $var_spec 0]
  63     set value [lindex $var_spec 1]
  64     set type [lindex $var_spec 2]
  65     set length [lindex $var_spec 3]
  66     with_test_prefix $var {
  67         gdb_test "print $var" "\"$value\""
  68         gdb_scm_test_silent_cmd "gu (define $var (history-ref 0))" "get value from history" 1
  69         gdb_scm_test_silent_cmd "gu (define l$var (value->lazy-string $var))" "acquire lazy string" 1
  70         gdb_test "gu (print (value-type $var))" "$type" "string type name equality"
  71         gdb_test "gu (print (lazy-string-type l$var))" "$type" "lazy-string type name equality"
  72         gdb_test "gu (print (lazy-string-length l$var))" "$length" "lazy string length"
  73         gdb_test "gu (print (lazy-string->value l$var))" "\"$value\"" "lazy string value"
  74         gdb_scm_test_silent_cmd "gu (define l2$var (value->lazy-string $var #:length 2))" "acquire lazy string, length 2" 1
  75         gdb_test "gu (print (lazy-string-length l2$var))" "2" "lazy string length 2"
  76         gdb_test "gu (print (lazy-string->value l2$var))" "\"[string range $value 0 1]\"" "lazy string length 2 value"
  77         # This test will have to wait until gdb can handle it. There's no way,
  78         # currently, to internally specify an array of length zero in the C
  79         # language support.  PR 20786
  80         #gdb_test "gu (print (lazy-string->value (value->lazy-string $var #:length 0)))" "\"\"" "empty lazy string value"
  81     }
  82 }