#   Copyright 1999, 2000 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.

# Please email any bugs, comments, and/or additions to this file to:
# bug-dejagnu@prep.ai.mit.edu

# Written by Nick Clifton <nickc@cygnus.com>
# Based on scripts written by Ian Lance Taylor <ian@cygnus.com>
# and Ken Raeburn <raeburn@cygnus.com>.

# First some helpful procedures, then the tests themselves

# Return the contents of the filename given
proc file_contents { filename } {
    set file [open $filename r]
    set contents [read $file]
    close $file
    return $contents
}

# regexp_diff, based on simple_diff taken from ld test suite
#	compares two files line-by-line
#	file1 contains strings, file2 contains regexps and #-comments
#	blank lines are ignored in either file
#	returns non-zero if differences exist
#
proc regexp_diff { file_1 file_2 } {

    set eof -1
    set end_1 0
    set end_2 0
    set differences 0
    set diff_pass 0

    if [file exists $file_1] then {
	set file_a [open $file_1 r]
    } else {
	warning "$file_1 doesn't exist"
	return 1
    }

    if [file exists $file_2] then {
	set file_b [open $file_2 r]
    } else {
	fail "$file_2 doesn't exist"
	close $file_a
	return 1
    }

    verbose " Regexp-diff'ing: $file_1 $file_2" 2

    while { 1 } {
	set line_a ""
	set line_b ""
	while { [string length $line_a] == 0 } {
	    if { [gets $file_a line_a] == $eof } {
		set end_1 1
		break
	    }
	}
	while { [string length $line_b] == 0 || [string match "#*" $line_b] } {
	    if [ string match "#pass" $line_b ] {
		set end_2 1
		set diff_pass 1
		break
	    } elseif [ string match "#..." $line_b ] {
		if { [gets $file_b line_b] == $eof } {
		    set end_2 1
		    break
		}
		verbose "looking for \"^$line_b$\"" 3
		while { ![regexp "^$line_b$" "$line_a"] } {
		    verbose "skipping    \"$line_a\"" 3
		    if { [gets $file_a line_a] == $eof } {
			set end_1 1
			break
		    }
		}
		break
	    }
	    if { [gets $file_b line_b] == $eof } {
		set end_2 1
		break
	    }
	}

        if { $diff_pass } { 
            break 
        } elseif { $end_1 && $end_2 } { 
            break
        } elseif { $end_1 } {
            send_log "extra regexps in $file_2 starting with \"^$line_b$\"\nEOF from $file_1\n"
            verbose "extra regexps in $file_2 starting with \"^$line_b$\"\nEOF from $file_1" 3
            set differences 1
            break
        } elseif { $end_2 } {
            send_log "extra lines in $file_1 starting with \"^$line_a$\"\nEOF from $file_2\n"
            verbose "extra lines in $file_1 starting with \"^$line_a$\"\nEOF from $file_2\n" 3
            set differences 1
            break
        } else {
            verbose "regexp \"^$line_b$\"\nline   \"$line_a\"" 3
            if ![regexp "^$line_b$" "$line_a"] {
		send_log "regexp_diff match failure\n"
		send_log "regexp \"^$line_b$\"\nline   \"$line_a\"\n"
		set differences 1
            }
        }
    }

    if { $differences == 0 && !$diff_pass && [eof $file_a] != [eof $file_b] } {
	send_log "$file_1 and $file_2 are different lengths\n"
	verbose "$file_1 and $file_2 are different lengths" 3
	set differences 1
    }

    close $file_a
    close $file_b

    return $differences
}

# Find out the size by reading the output of the EI_CLASS field.
# Similar to the test for readelf -h, but we're just looking for the
# EI_CLASS line here.
proc readelf_find_size { binary_file } {
    global READELF
    global READELFFLAGS
    global readelf_size

    set readelf_size ""
    set testname "finding out ELF size with readelf -h"
    catch "exec $READELF $READELFFLAGS -h $binary_file > readelf.out" got

    if ![string match "" $got] then {
	send_log $got
	fail $testname
	return
    }

    if { ! [regexp "\n\[ \]*Class:\[ \]*ELF(\[0-9\]+)\n" \
	    [file_contents readelf.out] nil readelf_size] } {
	verbose -log "EI_CLASS field not found in output"
	verbose -log "output is \n[file_contents readelf.out]"
	fail $testname
	return
    } else {
	verbose -log "ELF size is $readelf_size"
    }

    pass $testname
}

# Run an individual readelf test.
# Basically readelf is run on the binary_file with the given options.
# Readelf's output is captured and then compared against the contents
# of the regexp_file-readelf_size if it exists, else regexp_file.

proc readelf_test { options binary_file regexp_file xfails } {

    global READELF
    global READELFFLAGS
    global readelf_size
    global srcdir
    global subdir
    
    send_log "exec $READELF $READELFFLAGS $options $binary_file > readelf.out\n"
    catch "exec $READELF $READELFFLAGS $options $binary_file > readelf.out" got

    foreach xfail $xfails {
	setup_xfail $xfail
    }

    if ![string match "" $got] then {
	fail "readelf $options (reason: unexpected output)"
	send_log $got
	send_log "\n"
	return
    }

    set target_machine ""
    if [istarget "mips*-*-*"] then {
	if { [istarget "mips*-*-*linux*"] } then {
	    set target_machine tmips
	} else {
	    set target_machine mips
	}
    }

    if { $target_machine != "" && [file exists $srcdir/$subdir/$regexp_file-$readelf_size-$target_machine] } then {
	set regexp_file $regexp_file-$readelf_size-$target_machine
    } elseif { $target_machine != "" && [file exists $srcdir/$subdir/$regexp_file-$target_machine] } then {
	set regexp_file $regexp_file-$target_machine
    } elseif { [file exists $srcdir/$subdir/$regexp_file-$readelf_size] } then {
	set regexp_file $regexp_file-$readelf_size
    }

    if { [regexp_diff readelf.out $srcdir/$subdir/$regexp_file] } then {
	fail "readelf $options"
	verbose "output is \n[file_contents readelf.out]" 2
	return
    }

    pass "readelf $options"
}

# Simple proc to skip certain expected warning messages.

proc prune_readelf_wi_warnings { text } {
    regsub -all "(^|\n)(.*Skipping unexpected symbol type.*)" $text "\\1" text
    return $text
}

# Testing the "readelf -wi" option is difficult because there
# is no guaranteed order to the output, and because some ports
# will use indirect string references, whilst others will use
# direct references.  So instead of having an expected output
# file, like the other readelf tests, we grep for strings that
# really ought to be there.

proc readelf_wi_test {} {
    global READELF
    global READELFFLAGS
    global srcdir
    global subdir
    
    # Compile the second test file.
    if { [target_compile $srcdir/$subdir/testprog.c tmpdir/testprog.o object debug] != "" } {
	verbose "Unable to compile test file."
	untested "readelf -wi"
	return
    }

    # Download it.
    set tempfile [remote_download host tmpdir/testprog.o];

    # Run "readelf -wi" on it.
    send_log "exec $READELF $READELFFLAGS -wi $tempfile > readelf.out\n"
    catch "exec $READELF $READELFFLAGS -wi $tempfile > readelf.out" got

    # Upload the results.
    set output [remote_upload host readelf.out];

    file_on_host delete $tempfile;
    
    # Strip any superflous warnings.
    set got [prune_readelf_wi_warnings $got]

    if ![string match "" $got] then {
	fail "readelf $options (reason: unexpected output)"
	send_log $got
	send_log "\n"
	return
    }

    if ![file size $output] then {
	# If the output file is empty, then this target does not
	# generate dwarf2 output.  This is not a failure.
	verbose "No output from 'readelf -wi'"
	untested "readelf -wi"
	return
    }
    
    # Search for strings that should be in the output.
    set sought {
	".*DW_TAG_compile_unit.*"
	".*DW_TAG_subprogram.*"
	".*DW_TAG_base_type.*"
	".*DW_AT_producer.*(GNU C|indirect string).*"
	".*DW_AT_language.*ANSI C.*"
	".*DW_AT_name.*(testprog.c|indirect string).*"
	".*DW_AT_name.*fn.*"
	".*DW_AT_name.*(main|indirect string).*"
	".*\(DW_OP_addr: 0\).*"
    }
    
    foreach looked_for $sought {	
	set lines [grep $output $looked_for]
	if ![llength $lines] then {
	    fail "readelf -wi: missing: $looked_for"
	    send_log readelf.out
	    return
	}
    }

    file_on_host delete $output;
    
    # All done.
    pass "readelf -wi"
}


# Only ELF based toolchains need readelf.
# For now be paranoid and assume that if ELF is not mentioned
# in the target string, then the target is not an ELF based port.

if { ![istarget *-*-elf*] \
     && ![istarget *-*-linux*] \
     && ![istarget i?86-*-sysv4*] \
     && ![istarget i?86-*-unixware] \
     && ![istarget mips*-*-irix5*] \
     && ![istarget mips*-*-irix6*] \
     && ![istarget powerpc-*-sysv4*] \
     && ![istarget powerpc-*-eabi*] \
     && ![istarget sparc*-*-solaris2*] } {
    verbose "$READELF is only intended for ELF targets" 2
    return
}

if { [istarget *-*-linux*oldld*] \
     || [istarget *-*-linux*aout*] } {
    verbose "$READELF is only intended for ELF targets" 2
    return
}

if ![is_remote host] {
    if {[which $READELF] == 0} then {
        perror "$READELF does not exist"
        return
    }
}

send_user "Version [binutil_version $READELF]"

# Assemble the test file.
if {![binutils_assemble $srcdir/$subdir/bintest.s tmpdir/bintest.o]} then {
    perror "unresolved 1"
    unresolved "readelf - failed to assemble"
    return
}

if ![is_remote host] {
    set tempfile tmpdir/bintest.o;
} else {
    set tempfile [remote_download host tmpdir/bintest.o]
}

# First, determine the size, so specific output matchers can be used.
readelf_find_size $tempfile

# Run the tests.
readelf_test -h $tempfile readelf.h  {}
readelf_test -S $tempfile readelf.s  {}
readelf_test -s $tempfile readelf.ss {}
readelf_test -r $tempfile readelf.r  {}

readelf_wi_test
