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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 calling Fortran functions that are compiled without debug
     17 # information.
     18 
     19 require allow_fortran_tests
     20 
     21 standard_testfile call-no-debug-prog.f90 call-no-debug-func.f90
     22 load_lib fortran.exp
     23 
     24 if {[prepare_for_testing_full "failed to prepare" \
     25 	 [list ${binfile} [list debug f90] \
     26 	      $srcfile [list debug f90] \
     27 	      $srcfile2 [list nodebug f90]]]} {
     28     return -1
     29 }
     30 
     31 # Find a possibly mangled version of NAME, a function we want to call
     32 # that has no debug information available.  We hope that the mangled
     33 # version of NAME contains the pattern NAME, and so we use 'info
     34 # functions' to find a possible suitable symbol.
     35 #
     36 # If no suitable function is found then return the empty string.
     37 proc find_mangled_name { name } {
     38     global hex gdb_prompt
     39 
     40     set into_non_debug_symbols false
     41     set symbol_name "*unknown*"
     42     gdb_test_multiple "info function $name" "" {
     43 	-re ".*Non-debugging symbols:\r\n" {
     44 	    set into_non_debug_symbols true
     45 	    exp_continue
     46 	}
     47 	-re "$hex.*\[ \t\]+(\[^\r\n\]+)\r\n" {
     48 	    set symbol_name $expect_out(1,string)
     49 	    exp_continue
     50 	}
     51 	-re "^$gdb_prompt $" {
     52 	    # Done.
     53 	}
     54     }
     55 
     56     # If we couldn't find a suitable symbol name return the empty
     57     # string.
     58     if { $symbol_name == "*unknown*" } {
     59 	return ""
     60     }
     61 
     62     return $symbol_name
     63 }
     64 
     65 # Sample before before starting the exec, in order to avoid picking up symbols
     66 # from shared libs.
     67 set some_func [find_mangled_name "some_func"]
     68 set string_func [find_mangled_name "string_func"]
     69 
     70 if ![fortran_runto_main] {
     71     return -1
     72 }
     73 
     74 # Call the function SOME_FUNC, that takes a single integer and returns
     75 # an integer.  As the function has no debug information then we have
     76 # to pass the integer argument as '&1' so that GDB will send the
     77 # address of an integer '1' (as Fortran arguments are pass by
     78 # reference).
     79 set symbol_name $some_func
     80 if { $symbol_name == "" } {
     81     untested "couldn't find suitable name for 'some_func'"
     82 } else {
     83     gdb_test "ptype ${symbol_name}" "type = <unknown return type> \\(\\)"
     84     gdb_test "print ${symbol_name} (&1)" \
     85 	"'${symbol_name}' has unknown return type; cast the call to its declared return type"
     86     gdb_test "print (integer) ${symbol_name} (&1)" " = 2"
     87 }
     88 
     89 # Call the function STRING_FUNC which takes an assumed shape character
     90 # array (i.e. a string), and returns an integer.
     91 #
     92 # At least for gfortran, passing the string will pass both the data
     93 # pointer and an artificial argument, the length of the string.
     94 #
     95 # The compiled program is expecting the address of the string, so we
     96 # prefix that argument with '&', but the artificial length parameter
     97 # is pass by value, so there's no need for '&' in that case.
     98 set symbol_name $string_func
     99 if { $symbol_name == "" } {
    100     untested "couldn't find suitable name for 'string_func'"
    101 } else {
    102     gdb_test "ptype ${symbol_name}" "type = <unknown return type> \\(\\)"
    103     gdb_test "print ${symbol_name} (&'abcdefg', 3)" \
    104 	"'${symbol_name}' has unknown return type; cast the call to its declared return type"
    105     gdb_test_stdio "call (integer) ${symbol_name} (&'abcdefg', 3)" \
    106 	" abc" \
    107 	"\\\$\\d+ = 0"
    108 }
    109