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      1 # Copyright 2020-2024 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 to reproduce the crash described in PR 26693.  The following DWARF was
     17 # crashing GDB while loading partial symbols: a DW_TAG_subprogram with a
     18 # DW_AT_specification (pointing to another subprogram), without a DW_AT_name
     19 # and with a template parameter (DW_TAG_template_type_parameter).  More
     20 # precisely, the crash was happening when trying to compute the full name of the
     21 # subprogram.
     22 
     23 load_lib dwarf.exp
     24 
     25 require dwarf2_support
     26 
     27 standard_testfile main.c .S
     28 
     29 lassign [function_range main ${srcdir}/${subdir}/${srcfile}] \
     30     main_start main_length
     31 
     32 set asm_file [standard_output_file $srcfile2]
     33 Dwarf::assemble $asm_file {
     34     global main_start main_length
     35 
     36     cu { label cu_start } {
     37 	DW_TAG_compile_unit {
     38 	    {DW_AT_language @DW_LANG_C_plus_plus}
     39         } {
     40 	    declare_labels templated_subprogram int
     41 
     42 	    int: DW_TAG_base_type {
     43 		{DW_AT_name "int"}
     44 		{DW_AT_byte_size 4 DW_FORM_data1}
     45 		{DW_AT_encoding @DW_ATE_signed}
     46 	    }
     47 
     48 	    # The templated subprogram.
     49 	    templated_subprogram: DW_TAG_subprogram {
     50 		{DW_AT_name "apply"}
     51 	    }
     52 
     53 	    # The template specialization.
     54 	    #
     55 	    # The low and high PC are phony: we just need an address range that
     56 	    # is valid in the program, so we use the main function's range.
     57 	    DW_TAG_subprogram {
     58 		{DW_AT_specification :$templated_subprogram}
     59 		{MACRO_AT_range main}
     60 	    } {
     61 		DW_TAG_template_type_param {
     62 		  {DW_AT_name "T"}
     63 		  {DW_AT_type :$int DW_FORM_ref4}
     64 		}
     65 	    }
     66 	}
     67     }
     68 
     69     aranges {} cu_start {
     70 	arange {} "$main_start" "$main_length"
     71     }
     72 }
     73 
     74 if { [prepare_for_testing "failed to prepare" ${testfile} \
     75 	  [list $srcfile $asm_file] {nodebug}] } {
     76     return -1
     77 }
     78 
     79 if ![runto_main] {
     80     return -1
     81 }
     82 
     83 # Just a sanity check to make sure GDB slurped the symbols correctly.
     84 gdb_test "print apply<int>" " = {void \\(void\\)} $hex <apply<int>\\(\\)>"
     85