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      1 # Copyright 2016-2024 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 # Test printing a bitfield of an optimized-out variable.  Regression
     17 # test for PR gdb/20295.
     18 
     19 load_lib dwarf.exp
     20 
     21 # This test can only be run on targets which support DWARF-2 and use gas.
     22 require dwarf2_support
     23 
     24 standard_testfile main.c .S
     25 set executable ${testfile}
     26 
     27 # Make some DWARF for the test.
     28 set asm_file [standard_output_file $srcfile2]
     29 Dwarf::assemble $asm_file {
     30     cu { version 3 addr_size 4 } {
     31 	compile_unit {} {
     32 	    declare_labels struct_label var_label int_label
     33 
     34 	    int_label: base_type {
     35 		{byte_size 4 sdata}
     36 		{encoding @DW_ATE_signed}
     37 		{name int}
     38 	    }
     39 
     40 	    struct_label: structure_type {
     41 		{name S}
     42 		{byte_size 8 DW_FORM_sdata}
     43 	    } {
     44 		member {
     45 		    {name bitfield}
     46 		    {type :$int_label}
     47 		    {bit_size 12 DW_FORM_sdata}
     48 		    {bit_offset 20 DW_FORM_sdata}
     49 		}
     50 		member {
     51 		    {name intfield}
     52 		    {type :$int_label}
     53 		    {data_member_location 4 DW_FORM_sdata}
     54 		}
     55 	    }
     56 
     57 	    subprogram {
     58 		{MACRO_AT_func { main }}
     59 		{type :$int_label}
     60 		{external 1 flag}
     61 	    } {
     62 		var_label: DW_TAG_variable {
     63 		    {name var}
     64 		    {location {} DW_FORM_block1}
     65 		    {type :$struct_label}
     66 		}
     67 	    }
     68 	}
     69     }
     70 }
     71 
     72 if [prepare_for_testing "failed to prepare" $executable "${asm_file} ${srcfile}" {}] {
     73     return -1
     74 }
     75 
     76 if ![runto_main] {
     77     return -1
     78 }
     79 
     80 gdb_test "p var" " = <optimized out>"
     81 gdb_test "p var.bitfield" " = <optimized out>"
     82 gdb_test "p var.intfield" " = <optimized out>"
     83