[dwarf] Mark all functions as prototyped except C functions.

This makes sure that the types of the arguments are taken into account
when performing an inferior function call to a non-C (or C-like)
function.  In particular, this makes sure that the arguments are
appropriatly converted to the correct type.

For instance, on x86_64-linux, with the following Ada code:

   procedure Set_Float (F : Float) is
   begin
      Global_Float := F;
   end Set_Float;

The following sequence shows that Float arguments are incorrectly
passed (Ada's Float type is the equivalent of type "float" in C):

    (gdb) call set_float (2.0)
    (gdb) print global_float
    $1 = 0.0

Putting a breakpoint inside set_float to inspect the value of
register xmm0 gives the first hint of the problem:

    (gdb) p $xmm0
    $2 = (v4_float => (0 => 0.0, 2.0, 0.0, 0.0),
          v2_double => (0 => 2.0, 0.0),
    [...]

It shows that the argument was passed as a double.

The code responsible for doing appropriate type conversions
for the arguments (value_arg_coerce) found that our function
was not prototyped, and thus could not use typing information
for the arguments. Instead, it defaulted to the value of "set
coerce-float-to-double", which by default is true, to determine
the argument type.

This patch fixes the problem by setting the PROTOTYPE flag
for all functions of any language except C and Objective C.

gdb/ChangeLog:

        * dwarf2read.c (prototyped_function_p): New function.
        (read_subroutine_type): Use it.

gdb/testsuite/ChangeLog:

        * gdb.ada/float_param: New testcase.

4 files changed, 132 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.ada/float_param.exp b/gdb/testsuite/gdb.ada/float_param.exp
new file mode 100644
index 0000000..f0a7eac
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/float_param.exp
@@ -0,0 +1,43 @@
+# Copyright 2013 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/>.
+
+load_lib "ada.exp"
+
+if { [skip_ada_tests] } { return -1 }
+
+standard_ada_testfile foo
+
+if {[gdb_compile_ada "${srcfile}" "${binfile}" executable {debug}] != ""} {
+    return -1
+}
+
+clean_restart ${testfile}
+
+set bp_location [gdb_get_line_number "START" ${testdir}/foo.adb]
+runto "foo.adb:$bp_location"
+
+gdb_test_no_output "call set_float(2.0)"
+gdb_test "print global_float" \
+         " = 2\\.0"
+
+gdb_test_no_output "call set_double(1, 3.0)"
+gdb_test "print global_double" \
+         " = 3\\.0"
+
+gdb_test_no_output "call set_long_double(1, global_small_struct, 4.0)"
+gdb_test "print global_long_double" \
+         " = 4\\.0"
+
+
diff --git a/gdb/testsuite/gdb.ada/float_param/foo.adb b/gdb/testsuite/gdb.ada/float_param/foo.adb
new file mode 100644
index 0000000..2b08681
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/float_param/foo.adb
@@ -0,0 +1,23 @@
+--  Copyright 2013 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/>.
+
+with Pck; use Pck;
+
+procedure Foo is
+begin
+   Set_Float (1.0);  -- START
+   Set_Double (1, 1.0);
+   Set_Long_Double (1, (I => 2), 1.0);
+end Foo;
diff --git a/gdb/testsuite/gdb.ada/float_param/pck.adb b/gdb/testsuite/gdb.ada/float_param/pck.adb
new file mode 100644
index 0000000..18967e4
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/float_param/pck.adb
@@ -0,0 +1,35 @@
+--  Copyright 2013 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/>.
+
+package body Pck is
+
+   procedure Set_Float (F : Float) is
+   begin
+      Global_Float := F;
+   end Set_Float;
+
+   procedure Set_Double (Dummy : Integer; D : Long_Float) is
+   begin
+      Global_Double := D;
+   end Set_Double;
+
+   procedure Set_Long_Double (Dummy : Integer;
+                              DS : Small_Struct;
+                              LD : Long_Long_Float) is
+   begin
+      Global_Long_Double := LD;
+   end Set_Long_Double;
+
+end Pck;
diff --git a/gdb/testsuite/gdb.ada/float_param/pck.ads b/gdb/testsuite/gdb.ada/float_param/pck.ads
new file mode 100644
index 0000000..093a32d
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/float_param/pck.ads
@@ -0,0 +1,31 @@
+--  Copyright 2013 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/>.
+
+package Pck is
+   Global_Float : Float := 0.0;
+   Global_Double : Long_Float := 0.0;
+   Global_Long_Double : Long_Long_Float := 0.0;
+
+   type Small_Struct is record
+      I : Integer;
+   end record;
+   Global_Small_Struct : Small_Struct := (I => 0);
+
+   procedure Set_Float (F : Float);
+   procedure Set_Double (Dummy : Integer; D : Long_Float);
+   procedure Set_Long_Double (Dummy : Integer;
+                              DS: Small_Struct;
+                              LD : Long_Long_Float);
+end Pck;