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bitfield-parent-optimized-out.exp revision 1.1 
      1 # Copyright 2016 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 $asm_file {
     32     global srcdir subdir srcfile
     33 
     34     cu { version 3 addr_size 4 } {
     35 	compile_unit {} {
     36 	    declare_labels struct_label var_label int_label
     37 
     38 	    int_label: base_type {
     39 		{byte_size 4 sdata}
     40 		{encoding @DW_ATE_signed}
     41 		{name int}
     42 	    }
     43 
     44 	    struct_label: structure_type {
     45 		{name S}
     46 		{byte_size 4 DW_FORM_sdata}
     47 	    } {
     48 		member {
     49 		    {name bitfield}
     50 		    {type :$int_label}
     51 		    {bit_size 12 DW_FORM_sdata}
     52 		    {bit_offset 20 DW_FORM_sdata}
     53 		    {data_member_location 2 DW_FORM_sdata}
     54 		}
     55 		member {
     56 		    {name intfield}
     57 		    {type :$int_label}
     58 		    {data_member_location 2 DW_FORM_sdata}
     59 		}
     60 	    }
     61 
     62 	    subprogram {
     63 		{MACRO_AT_func { main ${srcdir}/${subdir}/${srcfile} }}
     64 		{type :$int_label}
     65 		{external 1 flag}
     66 	    } {
     67 		var_label: DW_TAG_variable {
     68 		    {name var}
     69 		    {location {} DW_FORM_block1}
     70 		    {type :$struct_label}
     71 		}
     72 	    }
     73 	}
     74     }
     75 }
     76 
     77 if [prepare_for_testing ${testfile}.exp $executable "${asm_file} ${srcfile}" {}] {
     78     return -1
     79 }
     80 
     81 if ![runto_main] {
     82     return -1
     83 }
     84 
     85 gdb_test "p var" " = <optimized out>"
     86 gdb_test "p var.bitfield" " = <optimized out>"
     87 gdb_test "p var.intfield" " = <optimized out>"
     88