[PATCH] Fortran: Testsuite, non-local references in nested functions.

[Bernhard Heckel <bernhard dot heckel at intel dot com>]

Non-local references in nested functions are usually implemented
by using DWARF static link. This feature was added
with commit 63e43d3aedb8b1112899c2d0ad74cbbee687e5d6
(DWARF: handle non-local references in nested functions) but
a testcase was missing in Fortran.

2016-06-01  Bernhard Heckel  <bernhard.heckel@intel.com>

gdb/Testsuite/Changelog:
	* gdb.fortran/nested-funcs.exp: New.
	* gdb.fortran/nested-funcs.f90:	New.

---
 gdb/testsuite/gdb.fortran/nested-funcs.exp | 64 ++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.fortran/nested-funcs.f90 | 50 +++++++++++++++++++++++
 2 files changed, 114 insertions(+)
 create mode 100755 gdb/testsuite/gdb.fortran/nested-funcs.exp
 create mode 100755 gdb/testsuite/gdb.fortran/nested-funcs.f90

diff --git a/gdb/testsuite/gdb.fortran/nested-funcs.exp b/gdb/testsuite/gdb.fortran/nested-funcs.exp
new file mode 100755
index 0000000..976aa22
--- /dev/null
+++ b/gdb/testsuite/gdb.fortran/nested-funcs.exp
@@ -0,0 +1,64 @@
+# Copyright 2016 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 3 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, see <http://www.gnu.org/licenses/>.
+
+# This testcase is supposed to test DWARF static link which is usually
+# used together with nested functions.  
+
+if { [skip_fortran_tests] } { return -1 }
+
+standard_testfile .f90
+load_lib "fortran.exp"
+
+if {[prepare_for_testing $testfile.exp $testfile $srcfile {debug f90}]} {
+    return -1
+}
+
+if ![runto MAIN__] then {
+    perror "couldn't run to breakpoint MAIN__"
+    continue
+}
+
+# Test if we can access local and
+# non-local variables defined one level up.
+gdb_breakpoint [gdb_get_line_number "! BP_outer"]
+gdb_continue_to_breakpoint "! BP_outer" ".*! BP_outer"
+gdb_test "print index" "= 13" "print index at BP_outer"
+gdb_test "set index = 42"
+gdb_test "print index" "= 42" "print index at BP_outer, manipulated"
+gdb_test "print local_int" "= 19" "print local_int in outer function"
+
+# Non-local variable should be affected in one frame up as well.
+gdb_test "up"
+gdb_test "print index" "= 42" "print index at BP1, one frame up"
+
+# Test if we can access local and
+# non-local variables defined two level up.
+gdb_breakpoint [gdb_get_line_number "! BP_inner"]
+gdb_continue_to_breakpoint "! BP_inner" ".*! BP_inner"
+gdb_test "print index" "= 42" "print index at BP_inner"
+gdb_test "print v_state%code" "= 61" "print v_state%code at BP_inner"
+gdb_test "print local_int" "= 17" "print local_int in inner function"
+
+# Test if local variable is still correct.
+gdb_breakpoint [gdb_get_line_number "! BP_outer_2"]
+gdb_continue_to_breakpoint "! BP_outer_2" ".*! BP_outer_2"
+gdb_test "print local_int" "= 19" \
+  "print local_int in outer function, after sub_nested_inner"
+
+# Sanity check in main.
+gdb_breakpoint [gdb_get_line_number "! BP_main"]
+gdb_continue_to_breakpoint "! BP_main" ".*! BP_main"
+gdb_test "print index" "= 42" "print index at BP_main"
+gdb_test "print v_state%code" "= 59" "print v_state%code at BP_main"
diff --git a/gdb/testsuite/gdb.fortran/nested-funcs.f90 b/gdb/testsuite/gdb.fortran/nested-funcs.f90
new file mode 100755
index 0000000..5501b3b
--- /dev/null
+++ b/gdb/testsuite/gdb.fortran/nested-funcs.f90
@@ -0,0 +1,50 @@
+! Copyright 2016 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 3 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, see <http://www.gnu.org/licenses/>.
+
+program TestNestedFuncs
+
+  IMPLICIT NONE
+
+  TYPE :: t_State
+    integer :: code
+  END TYPE t_State
+
+  TYPE (t_State) :: v_state
+  integer index
+
+  index = 13
+  CALL sub_nested_outer
+  index = 11              ! BP_main
+  v_state%code = 27
+
+CONTAINS
+
+  SUBROUTINE sub_nested_outer
+    integer local_int
+    local_int = 19
+    v_state%code = index + local_int   ! BP_outer
+    call sub_nested_inner
+    local_int = 22                     ! BP_outer_2
+    RETURN
+  END SUBROUTINE sub_nested_outer
+
+  SUBROUTINE sub_nested_inner
+    integer local_int
+    local_int = 17
+    v_state%code = index + local_int   ! BP_inner
+    RETURN
+  END SUBROUTINE sub_nested_inner
+
+end program TestNestedFuncs
-- 
2.7.1.339.g0233b80