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From: =?utf-8?b?SMOpY3RvciBPcsOzbiBNYXJ0w61uZXo=?= <[email protected]>
Date: Wed, 20 Feb 2019 13:25:36 0100
Subject: gdb-fortran-main
Daniel,
Although the proper way of adding case insensitivity to symbol lookup is
still under discussion, I think it might be desirable to set the main
function of Fortran programs to "MAIN__" first. Because it can at least
let GDB recognize that the language is Fortran after loading a Fortran
executable only. What is your idea on this? Please comments. TIA!
Here is the patch to set the main function in Fortran programs to
"MAIN__". And followed is a patch to verify this. Tested with g77 and
gfortran on x86, and g77 on ppc64. With the first patch, it reported
PASS; without, report FAIL. No regression is found in gdb.fortran
testcases.
P.S: if there is a symbol named "MAIN__" in sources of other languages, it
might disturb the debugging. But I am not sure how much it is.
---
gdb/symtab.c | 9 --
gdb/testsuite/gdb.fortran/lang.exp | 40
2 files changed, 47 insertions( ), 2 deletions(-)
create mode 100644 gdb/testsuite/gdb.fortran/lang.exp
Index: gdb/gdb/symtab.c
===================================================================
--- gdb.orig/gdb/symtab.c
gdb/gdb/symtab.c
@@ -6537,7 6537,14 @@ find_main_name (void)
if (symbol_found_p)
return;
- set_main_name (pspace, "main", language_unknown);
/* Fallback to "MAIN__" (g77 and gfortran) if we can find it in the
* minimal symtab, to "main" otherwise. */
struct bound_minimal_symbol msym = lookup_minimal_symbol ("MAIN__", NULL, NULL);
if (msym.minsym)
set_main_name (pspace, "MAIN__", language_fortran);
else
set_main_name (pspace, "main", language_unknown);
}
/* See symtab.h. */
Index: gdb/gdb/testsuite/gdb.fortran/lang.exp
===================================================================
--- /dev/null
gdb/gdb/testsuite/gdb.fortran/lang.exp
@@ -0,0 1,40 @@
# Copyright 2005 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# This file was written by Wu Zhou. ([email protected])
# This file is part of the gdb testsuite. It is intended to test that gdb
# could recognize the Fortran language after loading the binary
if $tracelevel then {
strace $tracelevel
}
set testfile "array-element"
set srcfile ${srcdir}/${subdir}/${testfile}.f
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcfile}" "${binfile}" executable {debug f77}] != "" } {
untested "Couldn't compile ${srcfile}"
return -1
}
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
gdb_test "show language" ".*currently fortran.*" "show language(fortran)"
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