ELF: Don't generate unused section symbols

[deliverable/binutils-gdb.git] / binutils / testsuite / binutils-all / readelf.exp

#   Copyright (C) 1999-2021 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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>.

# Exclude non-ELF targets.
if ![is_elf_format] {
    verbose "$READELF is only intended for ELF targets" 2
    return
}

# 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
}

# 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 test_iteration } {
    global READELF
    global READELFFLAGS
    global readelf_size

    set readelf_size ""
    set testname "finding out ELF size with readelf -h ($test_iteration)"
    set got [remote_exec host "$READELF $READELFFLAGS -h $binary_file" "" "/dev/null" "readelf.out"]
    if [is_remote host] then {
        remote_upload host "readelf.out"
    }

    if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]]} 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

    set testname "readelf $options [file rootname [file tail $binary_file]]"

    send_log "exec $READELF $READELFFLAGS $options $binary_file > readelf.out\n"
    set got [remote_exec host "$READELF $READELFFLAGS $options $binary_file" "" "/dev/null" "readelf.out"]

    foreach xfail $xfails {
	setup_xfail $xfail
    }

    if { [lindex $got 0] != 0 || ![string match "" [lindex $got 1]] } then {
	fail "$testname (reason: unexpected output)"
	send_log $got
	send_log "\n"
	return
    }

    if { [is_elf_unused_section_symbols ] } {
	set target_machine unused
    } else {
	set target_machine ""
    }
    if [istarget "mips*-*-*"] then {
	if [is_bad_symtab] then {
	    set target_machine mips
	} else {
	    set target_machine tmips
	}
    }

    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 $testname
	verbose "output is \n[file_contents readelf.out]" 2
	return
    }

    pass $testname
}

# 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.
    set got [remote_exec host "$READELF $READELFFLAGS -wi $tempfile" "" "/dev/null" "readelf.out"]

    # 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 [lindex $got 1]]

    if ![string match "" $got] then {
	fail "readelf $READELFFLAGS -wi (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|C11).*"
	".*DW_AT_name.*(testprog.c|indirect string).*"
	".*DW_AT_name.*fn.*"
	".*DW_AT_name.*(main|indirect string).*"
	".*\(DW_OP_addr: 0\).*"
    }

    # The MSP430 in LARGE mode does not generate a DW_OP_addr.
    setup_xfail msp430*-*-*

    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"
}

# This tests "readelf -wa", but on a file with a compressed
# .debug_abbrev section.

proc readelf_compressed_wa_test {} {
    global READELF
    global READELFFLAGS
    global srcdir
    global subdir

    # Compile the compressed-debug-section test file.
    if { [target_compile $srcdir/$subdir/dw2-compressed.S tmpdir/dw2-compressed.o object debug] != "" } {
	verbose "Unable to compile test file."
	untested "readelf -wa (compressed)"
	return
    }

    # Download it.
    set tempfile [remote_download host tmpdir/dw2-compressed.o]

    # Run "readelf -wa" on it.
    set got [remote_exec host "$READELF $READELFFLAGS -wa $tempfile" "" "/dev/null" "readelf.out"]

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

    file_on_host delete $tempfile

    if { [string compare [file_contents readelf.out] [file_contents $srcdir/$subdir/readelf.wa]] != 0 } then {
	fail "readelf -wa (compressed)"
	verbose "output is \n[file_contents readelf.out]" 2
	verbose "expected is \n[file_contents $srcdir/$subdir/readelf.wa]" 2
	return
    }

    pass "readelf -wa (compressed)"
}

# Test readelf's dumping abilities.

proc readelf_dump_test {} {
    global READELF
    global READELFFLAGS
    global srcdir
    global subdir

    # Assemble the dump test file.
    if {![binutils_assemble $srcdir/$subdir/dumptest.s tmpdir/dumptest.o]} then {
      unresolved "readelf -p: failed to assemble dump test file"
      return
    }
    # Download it.
    set tempfile [remote_download host tmpdir/dumptest.o]

    # Run "readelf -p.data" on it.
    set sect_names [get_standard_section_names]
    if { $sect_names != "" } {
	set got [remote_exec host "$READELF $READELFFLAGS -p[lindex $sect_names 1] $tempfile" "" "/dev/null" "readelf.out"]
    } else {
	set got [remote_exec host "$READELF $READELFFLAGS -p.data $tempfile" "" "/dev/null" "readelf.out"]
    }
    set got [lindex $got 1]

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

    # Check for something going wrong.
    if ![string match "" $got] then {
	fail "readelf -p: unexpected output"
	send_log $got
	send_log "\n"
	return
    }

    # Search for strings that should be in the output.
    set sought {
	".*test_string.*"
    }

    foreach looked_for $sought {
	set lines [grep $output $looked_for]
	if ![llength $lines] then {
	    fail "readelf -p: missing: $looked_for"
	    send_log readelf.out
	    return
	}
    }

    file_on_host delete $tempfile
    file_on_host delete $output

    # All done.
    pass "readelf -p"

    # XXX FIXME: Add test of readelf -x here
}

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 {
    unresolved "readelf -h bintest (failed to assemble)"
    unresolved "readelf -S bintest (failed to assemble)"
    unresolved "readelf -s bintest (failed to assemble)"
    unresolved "readelf -r bintest (failed to assemble)"
    global readelf_size
    set readelf_size ""
} else {

    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 1

    # Run the tests.
    readelf_test -h $tempfile readelf.h  {}
    readelf_test -S $tempfile readelf.s  {}
    setup_xfail "mips-*-*irix*"
    readelf_test -s $tempfile readelf.ss {}
    readelf_test -r $tempfile readelf.r  {}
}

# Test demangling symbol names.
if {![binutils_assemble $srcdir/$subdir/mangled.s tmpdir/mangled.o]} then {
    unresolved "readelf -s -C bintest (failed to assemble)"
} else {

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

    # Run the test.
    readelf_test {--syms --demangle --wide} $tempfile readelf.demangled {}
}

readelf_wi_test
readelf_compressed_wa_test

readelf_dump_test

# These dump tests require an assembler.
if {[which $AS] != 0} then {
    run_dump_test "pr25543"
    run_dump_test "retain1a"
    run_dump_test "retain1b"
    run_dump_test "readelf-maskos-1a"
    run_dump_test "readelf-maskos-1b"
}

# PR 13482 - Check for off-by-one errors when dumping .note sections.
if {![binutils_assemble $srcdir/$subdir/version.s tmpdir/version.o]} then {
    unresolved "readelf -n version (failed to assemble)"
} else {

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

    readelf_test -n $tempfile readelf.n  {}
}


# PR 18374 - Check that relocations against the .debug_loc section
# do not prevent readelf from displaying all the location lists.
if {![binutils_assemble $srcdir/$subdir/pr18374.s tmpdir/pr18374.o]} then {
    unresolved "readelf --debug-dump=loc pr18374 (failed to assemble)"
} else {

    if ![is_remote host] {
	set tempfile tmpdir/pr18374.o
    } else {
	set tempfile [remote_download host tmpdir/pr18374.o]
    }

    readelf_test --debug-dump=loc $tempfile readelf.pr18374  {}
}


# locview - Check dumping of location lists with location views.
if {![binutils_assemble $srcdir/$subdir/locview-1.s tmpdir/locview-1.o]} then {
    unresolved "readelf --debug-dump=loc locview-1 (failed to assemble)"
} else {

    if ![is_remote host] {
	set tempfile tmpdir/locview-1.o
    } else {
	set tempfile [remote_download host tmpdir/locview-1.o]
    }

    readelf_test --debug-dump=loc $tempfile readelf.locview-1  {}
}
if {![binutils_assemble $srcdir/$subdir/locview-2.s tmpdir/locview-2.o]} then {
    unresolved "readelf --debug-dump=loc locview-2 (failed to assemble)"
} else {

    if ![is_remote host] {
	set tempfile tmpdir/locview-2.o
    } else {
	set tempfile [remote_download host tmpdir/locview-2.o]
    }

    readelf_test --debug-dump=loc $tempfile readelf.locview-2  {}
}


# Check that decompressed dumps work.
if {![binutils_assemble $srcdir/$subdir/z.s tmpdir/z.o]} then {
    unresolved "readelf --decompress --hex-dump .debug_loc z (failed to assemble)"
} else {

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

    readelf_test {--decompress --hex-dump .debug_loc} $tempfile readelf.z  {}
}

# Skip the next test for the RISCV architectures because they
# do not support .ULEB128 pseudo-ops with non-constant values.
if ![istarget "riscv*-*-*"] then {

    set hpux ""
    if [istarget "hppa*64*-*-hpux*"] {
	set hpux "--defsym HPUX=1"
    }

    # Assemble the DWARF-5 test file.
    if {![binutils_assemble_flags $srcdir/$subdir/dw5.S tmpdir/dw5.o $hpux]} then {
	unresolved "readelf -wiaoRlL dw5 (failed to assemble)"
    } else {

	# Download it.
	if ![is_remote host] {
	    set tempfile tmpdir/dw5.o
	} else {
	    set tempfile [remote_download host tmpdir/dw5.o]
	}

	# First, determine the size, so specific output matchers can be used.
	readelf_find_size $tempfile 2

	# Make sure that readelf can decode the contents.
	readelf_test -wiaoRlL $tempfile dw5.W {}
    }
}

# Assemble the DWARF-5 attributes test file.
if {![binutils_assemble_flags $srcdir/$subdir/dwarf-attributes.S tmpdir/dwarf-attributes.o ""]} then {
    unresolved "readelf -wi dwarf-attributes (failed to assemble)"
} else {
    # Download it.
    if ![is_remote host] {
	set tempfile tmpdir/dwarf-attributes.o
    } else {
	set tempfile [remote_download host tmpdir/dwarf-attributes.o]
    }

    # First, determine the size, so specific output matchers can be used.
    readelf_find_size $tempfile 3

    # Make sure that readelf can decode the contents.
    readelf_test -wi $tempfile dwarf-attributes.W {}
}

# Check that debug link sections can be dumped.
if {![binutils_assemble $srcdir/$subdir/debuglink.s tmpdir/debuglink.o]} then {
    unresolved "readelf --debug-dump=links (failed to assemble debuglink.s)"
} else {
    if ![is_remote host] {
	set tempfile tmpdir/debuglink.o
    } else {
	set tempfile [remote_download host tmpdir/debuglink.o]
    }

    readelf_test {--debug-dump=links} $tempfile readelf.k  {}

    # Check that debug link sections can be followed.
    if {![binutils_assemble $srcdir/$subdir/linkdebug.s tmpdir/linkdebug.debug]} then {
	unresolved "readelf --debug-dump=follow-links (failed to assemble linkdebug.s)"
    } else {
	if [is_remote host] {
	    set tempfile2 [remote_download host tmpdir/linkdebug.debug]
	}

	readelf_test {-wKis} $tempfile readelf.wKis  {}
    }
}

if {![binutils_assemble $srcdir/$subdir/dwo.s tmpdir/dwo.o]} then {
    unresolved "readelf --debug-dump=links (failed to assemble dwo.s)"
} else {
    if ![is_remote host] {
	set tempfile tmpdir/dwo.o
    } else {
	set tempfile [remote_download host tmpdir/dwo.o]
    }

    readelf_test {--debug-dump=links} $tempfile readelf.k2  {}
}

if {![binutils_assemble $srcdir/$subdir/zero-sec.s tmpdir/zero-sec.o]} then {
    unresolved "readelf --enable-checks (failed to assemble zero-sec.s)"
} else {
    if ![is_remote host] {
	set tempfile tmpdir/zero-sec.o
    } else {
	set tempfile [remote_download host tmpdir/zero-sec.o]
    }

    readelf_test {--enable-checks --sections --wide} $tempfile zero-sec.r {}
}

if ![is_remote host] {
    set test $srcdir/$subdir/pr26112.o.bz2
    # We need to strip the ".bz2", but can leave the dirname.
    set t $subdir/[file tail $test]
    set testname [file rootname $t]
    verbose $testname
    set tempfile tmpdir/pr26112.o
    if {[catch "system \"bzip2 -dc $test > $tempfile\""] != 0} {
	untested "bzip2 -dc ($testname)"
    } else {
	readelf_test {--debug-dump=macro} $tempfile pr26112.r {}
    }
}