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      1 # Copyright 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 # Check that a symbol from an unused PU is not accessible.
     17 
     18 load_lib dwarf.exp
     19 
     20 # This test can only be run on targets which support DWARF-2 and use gas.
     21 require dwarf2_support
     22 
     23 standard_testfile main.c -dw.S
     24 
     25 # Create the DWARF.
     26 set asm_file [standard_output_file $srcfile2]
     27 Dwarf::assemble $asm_file {
     28     declare_labels partial_label int_label int_label2
     29 
     30     cu {} {
     31 	compile_unit {{language @DW_LANG_C}} {
     32 	    subprogram {
     33 		{MACRO_AT_func { main }}
     34 	    }
     35 	}
     36     }
     37 
     38     cu {} {
     39 	partial_unit {} {
     40 	    int_label: base_type {
     41 		{name int}
     42 		{byte_size 4 sdata}
     43 		{encoding @DW_ATE_signed}
     44 	    }
     45 
     46 	    constant {
     47 		{name the_int}
     48 		{type :$int_label}
     49 		{const_value 99 data1}
     50 	    }
     51 	}
     52     }
     53 }
     54 
     55 if { [prepare_for_testing "failed to prepare" $testfile \
     56 	  [list $asm_file $srcfile] {nodebug}] } {
     57     return -1
     58 }
     59 
     60 set cmd "p the_int"
     61 set re \
     62     [string_to_regexp \
     63 	 {No symbol "the_int" in current context.}]
     64 
     65 # Check that the unreferenced PU is not expanded.
     66 gdb_test $cmd $re
     67 
     68 # This should expand all CUs and referenced PUs, but not an unreferenced PU.
     69 gdb_test_no_output "maint expand-symtabs"
     70 
     71 # Flush the symbol cache to do a new symbol lookup.
     72 gdb_test_no_output "maint flush symbol-cache"
     73 
     74 # Check that the unreferenced PU is not expanded after "maint expand-symtabs".
     75 gdb_test $cmd $re "$cmd, again"
     76