# Copyright 2020 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 test covers some basic functionality for debugging mixed
# Fortran, C, and C++ applications.  Features tested include examining
# the backtrace, and printing frame arguments in frames of different
# languages.
#
# One important aspect of this test is that we set the language in
# turn to auto, fortran, c, and c++, and carry out the full test in
# each case to ensure that trying to print objects or types from one
# language, while GDB's language is set to another, doesn't crash GDB.

if {[skip_fortran_tests]} { return -1 }

standard_testfile mixed-lang-stack.c mixed-lang-stack.cpp mixed-lang-stack.f90

if {[prepare_for_testing_full "failed to prepare" \
	 [list ${binfile} {debug f90 additional_flags=-lstdc++} \
	      $srcfile {debug} \
	      $srcfile2 {debug c++} \
	      $srcfile3 {debug f90}]]} {
    return -1
}

# Runs the test program and examins the stack.  LANG is a string, the
# value to pass to GDB's 'set language ...' command.
proc run_tests { lang } {
    with_test_prefix "lang=${lang}" {
	global binfile hex

	clean_restart ${binfile}

	if ![runto_main] {
	    untested "could not run to main"
	    return -1
	}

	gdb_breakpoint "breakpt"
	gdb_continue_to_breakpoint "breakpt"

	if { $lang == "c" || $lang == "c++" } {
	    gdb_test "set language c" \
		"Warning: the current language does not match this frame."
	} else {
	    gdb_test_no_output "set language $lang"
	}

	# Check the backtrace.
	set e_arg "\['\"\]abcdef\['\"\]"
	set 1b_args "\[^\r\n\]+$e_arg\[^\r\n\]+"
	set 1g_args "obj=\[^\r\n\]+"
	set bt_stack \
	    [multi_line \
		 "#0\\s+breakpt \\(\\) at \[^\r\n\]+" \
		 "#1\\s+$hex in mixed_func_1h \\(\\) at \[^\r\n\]+" \
		 "#2\\s+$hex in mixed_func_1g \\($1g_args\\) at \[^\r\n\]+" \
		 "#3\\s+$hex in mixed_func_1f \\(\\) at \[^\r\n\]+" \
		 "#4\\s+$hex in mixed_func_1e \\(\\) at \[^\r\n\]+" \
		 "#5\\s+$hex in mixed_func_1d \\(\[^\r\n\]+\\) at \[^\r\n\]+" \
		 "#6\\s+$hex in mixed_func_1c \\(\[^\r\n\]+\\) at \[^\r\n\]+" \
		 "#7\\s+$hex in mixed_func_1b \\($1b_args\\) at \[^\r\n\]+" \
		 "#8\\s+$hex in mixed_func_1a \\(\\) at \[^\r\n\]+" \
		 "#9\\s+$hex in mixed_stack_main \\(\\) at \[^\r\n\]+" \
		 "#10\\s+$hex in main \\(\[^\r\n\]+\\) at .*" ]
	gdb_test "bt -frame-arguments all" $bt_stack

	# Check the language for frame #0.
	gdb_test "info frame" "source language fortran\..*" \
	    "info frame in frame #0"

	# Move up to the C++ frames and check the frame state, print a
	# C++ object.
	gdb_test "frame 2" "#2\\s+$hex in mixed_func_1g .*" \
	    "select frame #2"
	gdb_test "info frame" "source language c\\+\\+\..*" \
	    "info frame in frame #2"
	if { $lang == "fortran" } {
	    set obj_pattern " = \\( base_one = \\( num1 = 1, num2 = 2, num3 = 3 \\), base_two = \\( string = $hex 'Something in C\\+\\+\\\\000', val = 3.5 \\), xxx = 9, yyy = 10.5 \\)"
	} else {
	    set obj_pattern " = \\{<base_one> = \\{num1 = 1, num2 = 2, num3 = 3\\}, <base_two> = \\{string = $hex \"Something in C\\+\\+\", val = 3.5\\}, xxx = 9, yyy = 10.5\\}"
	}
	gdb_test "print obj" "${obj_pattern}"

	# Move up the stack a way, and check frame and the frame
	# arguments.
	gdb_test "frame 5" "#5\\s+$hex in mixed_func_1d .*" \
	    "select frame #5"
	gdb_test "info frame" "source language fortran\..*" \
	    "info frame in frame #5"

	gdb_test "up" "#6\\s+$hex in mixed_func_1c .*" \
	    "up to frame #6"
	gdb_test "info frame" "source language c\..*" \
	    "info frame in frame #6"

	if { $lang == "fortran" } {
	    set d_pattern "\\(4,5\\)"
	    set f_pattern "$hex 'abcdef\\\\000'"
	} else {
	    set d_pattern "4 \\+ 5i"
	    set f_pattern "$hex \"abcdef\""
	}

	set args_pattern [multi_line \
			      "a = 1" \
			      "b = 2" \
			      "c = 3" \
			      "d = ${d_pattern}" \
			      "f = ${f_pattern}" \
			      "g = $hex" ]

	gdb_test "info args" $args_pattern \
	    "info args in frame #6"
	if { $lang == "fortran" } {
	    set g_pattern " = \\( a = 1\\.5, b = 2\\.5 \\)"
	} else {
	    set g_pattern " = \\{a = 1\\.5, b = 2\\.5\\}"
	}
	gdb_test "print *g" "${g_pattern}" \
	    "print object pointed to by g"

	gdb_test "up" "#7\\s+$hex in mixed_func_1b .*" \
	    "up to frame #7"
	gdb_test "info frame" "source language fortran\..*" \
	    "info frame in frame #7"

	if { $lang == "c" || $lang == "c++" } {
	    set d_pattern "4 \\+ 5i"
	    set e_pattern "\"abcdef\""
	    set g_pattern "\{a = 1.5, b = 2.5\}"
	} else {
	    set d_pattern "\\(4,5\\)"
	    set e_pattern "'abcdef'"
	    set g_pattern "\\( a = 1.5, b = 2.5 \\)"
	}

	set args_pattern [multi_line \
			      "a = 1" \
			      "b = 2" \
			      "c = 3" \
			      "d = ${d_pattern}" \
			      "e = ${e_pattern}" \
			      "g = ${g_pattern}" \
			      "_e = 6" ]

	gdb_test "info args" $args_pattern \
	    "info args in frame #7"
    }
}

run_tests "auto"
run_tests "fortran"
run_tests "c"
run_tests "c++"