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bitfield-parent-optimized-out.exp revision 1.1.1.4 
      1 # Copyright 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 
     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 if {![dwarf2_support]} {
     23     return 0
     24 }
     25 
     26 standard_testfile main.c .S
     27 set executable ${testfile}
     28 
     29 # Make some DWARF for the test.
     30 set asm_file [standard_output_file $srcfile2]
     31 Dwarf::assemble $asm_file {
     32     cu { version 3 addr_size 4 } {
     33 	compile_unit {} {
     34 	    declare_labels struct_label var_label int_label
     35 
     36 	    int_label: base_type {
     37 		{byte_size 4 sdata}
     38 		{encoding @DW_ATE_signed}
     39 		{name int}
     40 	    }
     41 
     42 	    struct_label: structure_type {
     43 		{name S}
     44 		{byte_size 8 DW_FORM_sdata}
     45 	    } {
     46 		member {
     47 		    {name bitfield}
     48 		    {type :$int_label}
     49 		    {bit_size 12 DW_FORM_sdata}
     50 		    {bit_offset 20 DW_FORM_sdata}
     51 		}
     52 		member {
     53 		    {name intfield}
     54 		    {type :$int_label}
     55 		    {data_member_location 4 DW_FORM_sdata}
     56 		}
     57 	    }
     58 
     59 	    subprogram {
     60 		{MACRO_AT_func { main }}
     61 		{type :$int_label}
     62 		{external 1 flag}
     63 	    } {
     64 		var_label: DW_TAG_variable {
     65 		    {name var}
     66 		    {location {} DW_FORM_block1}
     67 		    {type :$struct_label}
     68 		}
     69 	    }
     70 	}
     71     }
     72 }
     73 
     74 if [prepare_for_testing "failed to prepare" $executable "${asm_file} ${srcfile}" {}] {
     75     return -1
     76 }
     77 
     78 if ![runto_main] {
     79     return -1
     80 }
     81 
     82 gdb_test "p var" " = <optimized out>"
     83 gdb_test "p var.bitfield" " = <optimized out>"
     84 gdb_test "p var.intfield" " = <optimized out>"
     85