Home | History | Annotate | Line # | Download | only in gdb.base 
      1 # Copyright 2014-2025 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 # Tests side-effects of sizeof evaluation.
     17 # Based on gcc/testsuite/gcc.dg/vla-4.c; vla-15.c
     18 
     19 standard_testfile
     20 
     21 if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
     22     return -1
     23 }
     24 
     25 if ![runto_main] {
     26     return -1
     27 }
     28 
     29 gdb_breakpoint [gdb_get_line_number "vla-filled"]
     30 gdb_continue_to_breakpoint "vla-filled"
     31 
     32 # Check side effects for sizeof argument.
     33 set sizeof_int [get_sizeof "int" 4]
     34 set sizeof_vla [ expr "10" * "$sizeof_int" ]
     35 
     36 gdb_test "print sizeof (vla1\[i++\])" " = ${sizeof_int}"
     37 gdb_test "print i" " = 0" \
     38          "print i - sizeof no side effects"
     39 
     40 gdb_test "print sizeof (++vla1\[0\])" " = ${sizeof_int}"
     41 gdb_test "print vla1\[0\]" " = 10" \
     42          "print vla1\[0\] - sizeof no side effects"
     43 
     44 gdb_test "ptype ++vla1\[0\]" "type = int"
     45 gdb_test "print vla1\[0\]" " = 10" \
     46          "print vla1\[0\] - ptype no side effects"
     47 
     48 gdb_test "whatis ++vla1\[0\]" "type = int"
     49 gdb_test "print vla1\[0\]" " = 10" \
     50          "print vla1\[0\] - whatis no side effects"
     51 
     52 
     53 gdb_test "print sizeof (vla2\[i++\])" " = ${sizeof_vla}"
     54 gdb_test "print i" " = 1" \
     55 	 "print i - sizeof with side effects, 1"
     56 
     57 gdb_test "print sizeof (vla2\[i++ + sizeof(j++)\])" " = ${sizeof_vla}"
     58 gdb_test "print i" " = 2" \
     59 	 "print i - sizeof with side effects, 2"
     60 gdb_test "print j" " = 0" \
     61          "print j - sizeof with no side effects"
     62 
     63 gdb_test "ptype vla2\[i++\]" "type = int \\\[10\\\]"
     64 gdb_test "print i" " = 2" \
     65 	 "print i - ptype with side effects, 1"
     66 
     67 gdb_test "ptype vla2\[i++ + sizeof(j++)\]" "type = int \\\[10\\\]"
     68 gdb_test "print i" " = 2" \
     69 	 "print i - ptype with side effects, 2"
     70 gdb_test "print j" " = 0" \
     71          "print j - ptype with no side effects"
     72 
     73 gdb_test "whatis vla2\[i++\]" "type = int \\\[10\\\]"
     74 gdb_test "print i" " = 2" \
     75 	 "print i - whatis with side effects, 1"
     76 
     77 gdb_test "whatis vla2\[i++ + sizeof(j++)\]" "type = int \\\[10\\\]"
     78 gdb_test "print i" " = 2" \
     79 	 "print i - whatis with side effects, 2"
     80 gdb_test "print j" " = 0" \
     81          "print j - whatis with no side effects"
     82