#   Copyright (C) 2003, 2005, 2008, 2009, 2010, 2011, 2014 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; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

proc load_gcc_lib { filename } {
    global srcdir
    load_file $srcdir/lib/$filename
}

load_lib dg.exp
load_lib libgloss.exp
load_gcc_lib target-libpath.exp
load_gcc_lib wrapper.exp


# Define libffi callbacks for dg.exp.

proc libffi-dg-test-1 { target_compile prog do_what extra_tool_flags } {

    # To get all \n in dg-output test strings to match printf output
    # in a system that outputs it as \015\012 (i.e. not just \012), we
    # need to change all \n into \r?\n.  As there is no dejagnu flag
    # or hook to do that, we simply change the text being tested.
    # Unfortunately, we have to know that the variable is called
    # dg-output-text and lives in the caller of libffi-dg-test, which
    # is two calls up.  Overriding proc dg-output would be longer and
    # would necessarily have the same assumption.
    upvar 2 dg-output-text output_match

    if { [llength $output_match] > 1 } {
	regsub -all "\n" [lindex $output_match 1] "\r?\n" x
	set output_match [lreplace $output_match 1 1 $x]
    }

    # Set up the compiler flags, based on what we're going to do.

    set options [list]
    switch $do_what {
	"compile" {
	    set compile_type "assembly"
	    set output_file "[file rootname [file tail $prog]].s"
	}
	"link" {
	    set compile_type "executable"
	    set output_file "[file rootname [file tail $prog]].exe"
	    # The following line is needed for targets like the i960 where
	    # the default output file is b.out.  Sigh.
	}
	"run" {
	    set compile_type "executable"
	    # FIXME: "./" is to cope with "." not being in $PATH.
	    # Should this be handled elsewhere?
	    # YES.
	    set output_file "./[file rootname [file tail $prog]].exe"
	    # This is the only place where we care if an executable was
	    # created or not.  If it was, dg.exp will try to run it.
	    remote_file build delete $output_file;
	}
	default {
	    perror "$do_what: not a valid dg-do keyword"
	    return ""
	}
    }

    if { $extra_tool_flags != "" } {
	lappend options "additional_flags=$extra_tool_flags"
    }

    set comp_output [libffi_target_compile "$prog" "$output_file" "$compile_type" $options];


    return [list $comp_output $output_file]
}


proc libffi-dg-test { prog do_what extra_tool_flags } {
    return [libffi-dg-test-1 target_compile $prog $do_what $extra_tool_flags]
}

proc libffi-init { args } {
    global gluefile wrap_flags;
    global srcdir
    global blddirffi
    global objdir
    global TOOL_OPTIONS
    global tool
    global libffi_include
    global libffi_link_flags
    global tool_root_dir
    global ld_library_path
    global compiler_vendor

    set blddirffi [pwd]/.. 
    verbose "libffi $blddirffi"

    # Which compiler are we building with?
    set tmp [grep ../config.log "^ax_cv_c_compiler_vendor.*$"]
    regexp -- {^[^=]*=(.*)$} $tmp nil compiler_vendor

    if { [string match $compiler_vendor "gnu"] } {
        set gccdir [lookfor_file $tool_root_dir gcc/libgcc.a]
        if {$gccdir != ""} {
	    set gccdir [file dirname $gccdir]
        }
        verbose "gccdir $gccdir"

        set ld_library_path "."
        append ld_library_path ":${gccdir}"

        set compiler "${gccdir}/xgcc"
        if { [is_remote host] == 0 && [which $compiler] != 0 } {
	    foreach i "[exec $compiler --print-multi-lib]" {
	        set mldir ""
	        regexp -- "\[a-z0-9=_/\.-\]*;" $i mldir
	        set mldir [string trimright $mldir "\;@"]
	        if { "$mldir" == "." } {
		    continue
	        }
	        if { [llength [glob -nocomplain ${gccdir}/${mldir}/libgcc_s*.so.*]] >= 1 } {
		    append ld_library_path ":${gccdir}/${mldir}"
	        }
	    }
        }
    }

    # add the library path for libffi.
    append ld_library_path ":${blddirffi}/.libs"

    verbose "ld_library_path: $ld_library_path"

    # Point to the Libffi headers in libffi.
    set libffi_include "${blddirffi}/include"
    verbose "libffi_include $libffi_include"

    set libffi_dir  "${blddirffi}/.libs"
    verbose "libffi_dir $libffi_dir"
    if { $libffi_dir != "" } {
	set libffi_dir [file dirname ${libffi_dir}]
	set libffi_link_flags "-L${libffi_dir}/.libs"
    }

    set_ld_library_path_env_vars
    libffi_maybe_build_wrapper "${objdir}/testglue.o"
}

proc libffi_exit { } {
    global gluefile;

    if [info exists gluefile] {
	file_on_build delete $gluefile;
	unset gluefile;
    }
}

proc libffi_target_compile { source dest type options } {
    global gluefile wrap_flags;
    global srcdir
    global blddirffi
    global TOOL_OPTIONS
    global libffi_link_flags
    global libffi_include
    global target_triplet


    if { [target_info needs_status_wrapper]!="" && [info exists gluefile] } {
	lappend options "libs=${gluefile}"
	lappend options "ldflags=$wrap_flags"
    }

    # TOOL_OPTIONS must come first, so that it doesn't override testcase
    # specific options.
    if [info exists TOOL_OPTIONS] {
	lappend  options [concat "additional_flags=$TOOL_OPTIONS" $options];
    }

    # search for ffi_mips.h in srcdir, too
    lappend options "additional_flags=-I${libffi_include} -I${srcdir}/../include  -I${libffi_include}/.."
    lappend options "additional_flags=${libffi_link_flags}"

    # Darwin needs a stack execution allowed flag.

    if { [istarget "*-*-darwin9*"] || [istarget "*-*-darwin1*"]
	 || [istarget "*-*-darwin2*"] } {
	lappend options "additional_flags=-Wl,-allow_stack_execute"
    }

    # If you're building the compiler with --prefix set to a place
    # where it's not yet installed, then the linker won't be able to
    # find the libgcc used by libffi.dylib.  We could pass the
    # -dylib_file option, but that's complicated, and it's much easier
    # to just make the linker find libgcc using -L options.
    if { [string match "*-*-darwin*" $target_triplet] } {
	lappend options "libs= -shared-libgcc"
    }

    if { [string match "*-*-openbsd*" $target_triplet] } {
	lappend options "libs= -lpthread"
    }

    lappend options "libs= -lffi"

    if { [string match "aarch64*-*-linux*" $target_triplet] } {
	lappend options "libs= -lpthread"
    }

    if { [string match "*.cc" $source] } {
	lappend options "c++"
    }

    verbose "options: $options"
    return [target_compile $source $dest $type $options]
}

# TEST should be a preprocessor condition.  Returns true if it holds.
proc libffi_feature_test { test } {
    set src "ffitest.c"

    set f [open $src "w"]
    puts $f "#include <ffi.h>"
    puts $f $test
    puts $f "xyzzy"
    puts $f "#endif"
    close $f

    set lines [libffi_target_compile $src "" "preprocess" ""]
    file delete $src

    set last [lindex $lines end]
    return [regexp -- "xyzzy" $last]
}

# Utility routines.

#
# search_for -- looks for a string match in a file
#
proc search_for { file pattern } {
    set fd [open $file r]
    while { [gets $fd cur_line]>=0 } {
	if [string match "*$pattern*" $cur_line] then {
	    close $fd
	    return 1
	}
    }
    close $fd
    return 0
}

# Modified dg-runtest that can cycle through a list of optimization options
# as c-torture does.
proc libffi-dg-runtest { testcases default-extra-flags } {
    global runtests

    foreach test $testcases {
	# If we're only testing specific files and this isn't one of
	# them, skip it.
	if ![runtest_file_p $runtests $test] {
	    continue
	}

	# Look for a loop within the source code - if we don't find one,
	# don't pass -funroll[-all]-loops.
	global torture_with_loops torture_without_loops
	if [expr [search_for $test "for*("]+[search_for $test "while*("]] {
	    set option_list $torture_with_loops
	} else {
	    set option_list $torture_without_loops
	}

	set nshort [file tail [file dirname $test]]/[file tail $test]

	foreach flags $option_list {
	    verbose "Testing $nshort, $flags" 1
	    dg-test $test $flags ${default-extra-flags}
	}
    }
}

proc run-many-tests { testcases extra_flags } {
    global compiler_vendor
    switch $compiler_vendor {
      "clang" {
	set common "-W -Wall"
	set optimizations { "-O0" "-O1" "-O2" "-O3" "-Os" }
      }
      "gnu" {
        set common "-W -Wall -Wno-psabi"
        set optimizations { "-O0" "-O2" "-O3" "-Os" "-O2 -fomit-frame-pointer" }
      }
      default {
        # Assume we are using the vendor compiler.
        set common ""
        set optimizations { "" }
      }
    }

    set targetabis { "" }
    if [string match $compiler_vendor "gnu"] {
        if [istarget "i?86-*-*"] {
            set targetabis {
                ""
                "-DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__"
                "-DABI_NUM=FFI_THISCALL -DABI_ATTR=__THISCALL__"
                "-DABI_NUM=FFI_FASTCALL -DABI_ATTR=__FASTCALL__"
            }
        }
    }

    set common [ concat $common $extra_flags ]
    foreach test $testcases {
        set testname [file tail $test]
        if [search_for $test "ABI_NUM"] {
            set abis $targetabis
        } else {
            set abis { "" }
        }
        foreach opt $optimizations {
            foreach abi $abis {
                set options [concat $common $opt $abi]
                verbose "Testing $testname, $options" 1
                dg-test $test $options ""
            }
        }
    }
}

# Like check_conditional_xfail, but callable from a dg test.

proc dg-xfail-if { args } {
    set args [lreplace $args 0 0]
    set selector "target [join [lindex $args 1]]"
    if { [dg-process-target $selector] == "S" } {
	global compiler_conditional_xfail_data
	set compiler_conditional_xfail_data $args
    }
}

proc check-flags { args } {

    # The args are within another list; pull them out.
    set args [lindex $args 0]

    # The next two arguments are optional.  If they were not specified,
    # use the defaults.
    if { [llength $args] == 2 } {
	lappend $args [list "*"]
    }
    if { [llength $args] == 3 } {
	lappend $args [list ""]
    }

    # If the option strings are the defaults, or the same as the
    # defaults, there is no need to call check_conditional_xfail to
    # compare them to the actual options.
    if { [string compare [lindex $args 2] "*"] == 0
	 && [string compare [lindex $args 3] "" ] == 0 } {
	set result 1    
    } else {
	# The target list might be an effective-target keyword, so replace
	# the original list with "*-*-*", since we already know it matches.
	set result [check_conditional_xfail [lreplace $args 1 1 "*-*-*"]]
    }

    return $result
}

proc dg-skip-if { args } {
    # Verify the number of arguments.  The last two are optional.
    set args [lreplace $args 0 0]
    if { [llength $args] < 2 || [llength $args] > 4 } {
        error "dg-skip-if 2: need 2, 3, or 4 arguments"
    }

    # Don't bother if we're already skipping the test.
    upvar dg-do-what dg-do-what
    if { [lindex ${dg-do-what} 1] == "N" } {
      return
    }

    set selector [list target [lindex $args 1]]
    if { [dg-process-target $selector] == "S" } {
        if [check-flags $args] {
            upvar dg-do-what dg-do-what
            set dg-do-what [list [lindex ${dg-do-what} 0] "N" "P"]
        }
    }
}

# We need to make sure that additional_files and additional_sources
# are both cleared out after every test.  It is not enough to clear
# them out *before* the next test run because gcc-target-compile gets
# run directly from some .exp files (outside of any test).  (Those
# uses should eventually be eliminated.)

# Because the DG framework doesn't provide a hook that is run at the
# end of a test, we must replace dg-test with a wrapper.

if { [info procs saved-dg-test] == [list] } {
    rename dg-test saved-dg-test

    proc dg-test { args } {
	global additional_files
	global additional_sources
	global errorInfo

	if { [ catch { eval saved-dg-test $args } errmsg ] } {
	    set saved_info $errorInfo
	    set additional_files ""
	    set additional_sources ""
	    error $errmsg $saved_info
	}
	set additional_files ""
	set additional_sources ""
    }
}

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