Subversion Repositories openrisc

# Copyright 2010 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 only works on GNU/Linux.
if { ![isnative] || [is_remote host] || ![istarget *-linux*] || [skip_shlib_tests]} {
    continue
}

set test "break-interp"
set binprefix ${objdir}/${subdir}/${test}
# Only to get the $interp_system name.
set srcfile_test "start.c"
set binfile_test ${test}-test
set binfile_lib ${objdir}/${subdir}/${test}.so
set srcfile "${test}-main.c"
set srcfile_lib "${test}-lib.c"

if [get_compiler_info ${binfile_lib}] {
    return -1
}

# Use -soname so that it is listed with " => " by ldd and this testcase makes
# a copy of ${binfile_lib} for each prelink variant.

if {[gdb_compile_shlib ${srcdir}/${subdir}/${srcfile_lib} ${binfile_lib} [list debug additional_flags=-Wl,-soname,${test}.so]] != ""} {
    return -1
}

if {[build_executable ${test}.exp $binfile_test ${srcfile_test} {}] == -1} {
    return -1
}

# Return the interpreter filename string.
# Return "" if no interpreter was found.
proc section_get {exec section} {
    global objdir
    global subdir
    set tmp "${objdir}/${subdir}/break-interp.interp"
    set objcopy_program [transform objcopy]

    set command "exec $objcopy_program -O binary --set-section-flags $section=A --change-section-address $section=0 -j $section $exec $tmp"
    verbose -log "command is $command"
    set result [catch $command output]
    verbose -log "result is $result"
    verbose -log "output is $output"
    if {$result == 1} {
        return ""
    }
    set fi [open $tmp]
    fconfigure $fi -translation binary
    set data [read $fi]
    close $fi
    #file delete $tmp
    # .interp has size $len + 1 but .gnu_debuglink contains garbage after \000.
    set len [string first \000 $data]
    if {$len < 0} {
        verbose -log "section $section not found"
        return ""
    }
    set retval [string range $data 0 [expr $len - 1]]
    verbose -log "section $section is <$retval>"
    return $retval
}

# Note: The separate debug info file content build-id/crc32 are not verified
# contrary to the GDB search algorithm skipping non-matching ones.
proc system_debug_get {exec} {
    global debug_root

    set exec_build_id_debug [build_id_debug_filename_get $exec]
    set debug_base "[file tail $exec].debug"
    set exec_dir [file dirname $exec]

    # isfile returns 1 even for symlinks to files.
    set retval $debug_root/$exec_build_id_debug
    if [file isfile $retval] {
        return $retval
    }
    set retval $exec_dir/$debug_base
    if [file isfile $retval] {
        return $retval
    }
    set retval $exec_dir/.debug/$debug_base
    if [file isfile $retval] {
        return $retval
    }
    set retval $debug_root/$exec_dir/$debug_base
    if [file isfile $retval] {
        return $retval
    }
    return ""
}

gdb_exit
gdb_start
set debug_root ""
set test "show debug-file-directory"
gdb_test_multiple $test $test {
    -re "The directory where separate debug symbols are searched for is \"(.*)\".\r\n$gdb_prompt $" {
        set debug_root $expect_out(1,string)
    }
}

set interp_system [section_get ${objdir}/${subdir}/$binfile_test .interp]
set interp_system_debug [system_debug_get $interp_system]
verbose -log "$interp_system has debug $interp_system_debug"

proc prelinkNO_run {arg} {
    set command "exec /usr/sbin/prelink -uN $arg"
    verbose -log "command is $command"
    set result [catch $command output]
    verbose -log "result is $result"
    verbose -log "output is $output"
    return [list $result $output]
}

proc prelinkNO {arg {name {}}} {
    if {$name == ""} {
        set name [file tail $arg]
    }
    set test "unprelink $name"
    set run [prelinkNO_run $arg]
    set result [lindex $run 0]
    set output [lindex $run 1]
    if {$result == 0 && $output == ""} {
        verbose -log "$name has been now unprelinked"
        set run [prelinkNO_run $arg]
        set result [lindex $run 0]
        set output [lindex $run 1]
    }
    # Last line does miss the trailing \n.
    if {$result == 1 && [regexp {^(/usr/sbin/prelink: [^ ]* does not have .gnu.prelink_undo section\n?)*$} $output]} {
        pass $test
        return 1
    } else {
        fail $test
        return 0
    }
}

proc prelinkYES {arg {name ""}} {
    if {$name == ""} {
        set name [file tail $arg]
    }
    set test "prelink $name"
    set command "exec /usr/sbin/prelink -qNR --no-exec-shield $arg"
    verbose -log "command is $command"
    set result [catch $command output]
    verbose -log "result is $result"
    verbose -log "output is $output"
    if {$result == 0 && $output == ""} {
        pass $test
        return 1
    } else {
        fail $test
        return 0
    }
}

# Resolve symlinks.
proc symlink_resolve {file} {
    set loop 0
    while {[file type $file] == "link"} {
        set target [file readlink $file]
        if {[file pathtype $target] == "relative"} {
            set src2 [file dirname $file]/$target
        } else {
            set src2 $target
        }
        verbose -log "Resolved symlink $file targetting $target as $src2"
        set file $src2

        set loop [expr $loop + 1]
        if {$loop > 30} {
            fail "Looping symlink resolution for $file"
            return ""
        }
    }
    return $file
}

proc copy {src dest} {
    set src [symlink_resolve $src]
    # Test name would contain build-id hash for symlink-unresolved $src.
    set test "copy [file tail $src] to [file tail $dest]"
    set command "file copy -force $src $dest"
    verbose -log "command is $command"
    if [catch $command] {
        fail $test
        return 0
    } else {
        pass $test
        return 1
    }
}

proc strip_debug {dest} {
    set test "strip [file tail $dest]"
    set strip_program [transform strip]
    set command "exec $strip_program --strip-debug $dest"
    verbose -log "command is $command"
    if [catch $command] {
        fail $test
        return 0
    } else {
        pass $test
        return 1
    }
}

# `runto' does not check we stopped really at the function we specified.
proc reach {func command} {
    global gdb_prompt

    if [gdb_breakpoint $func allow-pending] {
        set test "reach $func"
        gdb_test_multiple $command $test {
            -re "Breakpoint \[0-9\]+, $func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" {
                pass $test
            }
            -re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in $func \\(\\)( from .*)?\r\n$gdb_prompt $" { 
                pass $test
            }
        }
    }
}

proc test_core {file} {
    global srcdir subdir gdb_prompt

    set corefile [core_find $file {} "segv"]
    if {$corefile == ""} {
        return
    }

    gdb_exit
    gdb_start
    # Clear it to never find any separate debug infos in $debug_root.
    gdb_test "set debug-file-directory" "" "set debug-file-directory for core"
    gdb_reinitialize_dir $srcdir/$subdir
    gdb_load $file

    # Do not check the binary filename as it may be truncated.
    gdb_test "core-file $corefile" "Core was generated by .*\r\n#0 .*" "core loaded"

    gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "core main bt"
}

proc test_attach {file} {
    global board_info

    gdb_exit

    set test "sleep function started"

    set command "${file} sleep"
    set res [remote_spawn host $command];
    if { $res < 0 || $res == "" } {
        perror "Spawning $command failed."
        fail $test
        return
    }
    set pid [exp_pid -i $res]
    gdb_expect {
        -re "sleeping\r\n" {
            pass $test
        }
        eof {
            fail "$test (eof)"
            return
        }
        timeout {
            fail "$test (timeout)"
            return
        }
    }

    gdb_exit
    gdb_start
    gdb_test "attach $pid" "Attaching to process $pid\r\n.*" "attach"
    gdb_test "bt" "#\[0-9\]+ +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#\[0-9\]+ +\[^\r\n\]*\\mmain\\M.*" "attach main bt"
    gdb_exit

    remote_exec host "kill -9 $pid"
}

proc test_ld {file ifmain trynosym} {
    global srcdir subdir gdb_prompt

    # First test normal `file'-command loaded $FILE with symbols.

    gdb_exit
    gdb_start
    # Clear it to never find any separate debug infos in $debug_root.
    gdb_test "set debug-file-directory"
    gdb_reinitialize_dir $srcdir/$subdir
    gdb_load $file

    reach "dl_main" "run segv"

    gdb_test "bt" "#0 +\[^\r\n\]*\\mdl_main\\M.*" "dl bt"

    if $ifmain {
        reach "main" continue

        reach "libfunc" continue

        gdb_test "bt" "#0 +\[^\r\n\]*\\mlibfunc\\M\[^\r\n\]*\r\n#1 +\[^\r\n\]*\\mmain\\M.*" "main bt"

        test_core $file

        test_attach $file
    }

    if !$trynosym {
        return
    }

    global pf_prefix
    set old_ldprefix $pf_prefix
    lappend pf_prefix "symbol-less:"

    # Test also `exec-file'-command loaded $FILE - therefore without symbols.
    # SYMBOL_OBJFILE is not available and only EXEC_BFD must be used.

    gdb_exit
    gdb_start
    # Clear it to never find any separate debug infos in $debug_root.
    gdb_test "set debug-file-directory"
    gdb_reinitialize_dir $srcdir/$subdir

    # Test no (error) message has been printed by `exec-file'.
    set escapedfile [string_to_regexp $file]
    gdb_test "exec-file $file" "exec-file $escapedfile" "load"

    if $ifmain {
        reach "dl_main" run

        set test "info files"
        set entrynohex ""
        gdb_test_multiple $test $test {
            -re "\r\n\[\t \]*Entry point:\[\t \]*0x(\[0-9a-f\]+)\r\n.*$gdb_prompt $" {
                set entrynohex $expect_out(1,string) 
                pass $test
            }
        }
        if {$entrynohex != ""} {
            gdb_test "break *0x$entrynohex" "" "break at entry point"
            gdb_test "continue" "\r\nBreakpoint \[0-9\]+, 0x0*$entrynohex in .*" "entry point reached"
        }
    } else {
        # There is no symbol to break at ld.so.  Moreover it can exit with an
        # error code.
        gdb_test "run" "Program exited (normally|with code \[0-9\]+)\\." "ld.so exit"
    }

    set pf_prefix $old_ldprefix
}

# Create separate binaries for each testcase - to make the possible reported
# problem reproducible after the whole test run finishes.

set old_ldprefix $pf_prefix
foreach ldprelink {NO YES} {
    foreach ldsepdebug {NO IN SEP} {
        # Skip running the ldsepdebug test if we do not have system separate
        # debug info available.
        if {$interp_system_debug == "" && $ldsepdebug == "SEP"} {
            continue
        }

        set ldname "LDprelink${ldprelink}debug${ldsepdebug}"
        set interp $binprefix-$ldname

        # prelink needs to always prelink all the dependencies to do any file
        # modifications of its files.  ld.so also needs all the dependencies to
        # be prelinked to omit the relocation process.  In-memory file offsets
        # are not dependent whether ld.so went the prelink way or through the
        # relocation process.
        #
        # For GDB we are not interested whether prelink succeeds as it is
        # transparent to GDB.  GDB is being tested for differences of file
        # offsets vs. in-memory offsets.  So we have to prelink even ld.so for
        # the BIN modification to happen but we need to restore the original
        # possibly unprelinked ld.so to test all the combinations for GDB.
        set interp_saved ${interp}-saved

        set pf_prefix $old_ldprefix
        lappend pf_prefix "$ldname:"

        if {$ldsepdebug == "NO"} {
            copy $interp_system $interp
            # Never call strip-debug before unprelink:
            # prelink: ...: Section .note.gnu.build-id created after prelinking
            if ![prelinkNO $interp] {
                continue
            }
            strip_debug $interp
        } elseif {$ldsepdebug == "IN" && $interp_system_debug == ""} {
            copy $interp_system $interp
        } elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {
            copy $interp_system $interp
            copy $interp_system_debug "${interp}.debug"
            # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
            if {![prelinkNO $interp] || ![prelinkNO "${interp}.debug"]} {
                continue
            }
            set test "eu-unstrip unprelinked:[file tail $interp_system] + [file tail $interp_system_debug] to [file tail $interp]"
            set command "exec eu-unstrip -o $interp $interp ${interp}.debug"
            verbose -log "command is $command"
            if [catch $command] {
                setup_xfail *-*-*
                fail $test
                continue
            } else {
                pass $test
            }
        } elseif {$ldsepdebug == "SEP" && $interp_system_debug == ""} {
            copy $interp_system $interp
            # eu-unstrip: DWARF data in '...' not adjusted for prelinking bias; consider prelink -u
            if ![prelinkNO $interp] {
                continue
            }
            gdb_gnu_strip_debug $interp
        } elseif {$ldsepdebug == "SEP" && $interp_system_debug != ""} {
            copy $interp_system $interp
            copy $interp_system_debug "${interp}.debug"
        }

        if {$ldsepdebug == "SEP"} {
            if ![prelinkNO "${interp}.debug"] {
                continue
            }
        } else {
            file delete "${interp}.debug"
        }

        if ![prelink$ldprelink $interp] {
            continue
        }
        test_ld $interp 0 [expr {$ldsepdebug == "NO"}]

        if ![copy $interp $interp_saved] {
            continue
        }
        set old_binprefix $pf_prefix
        foreach binprelink {NO YES} {
            foreach binsepdebug {NO IN SEP} {
                foreach binpie {NO YES} {
                    # This combination is not possible, non-PIE (fixed address)
                    # binary cannot be prelinked to any (other) address.
                    if {$binprelink == "YES" && $binpie == "NO"} {
                        continue
                    }

                    set binname "BINprelink${binprelink}debug${binsepdebug}pie${binpie}"
                    set exec $binprefix-$binname
                    set dir ${exec}.d

                    set pf_prefix $old_binprefix
                    lappend pf_prefix "$binname:"

                    set opts "additional_flags=-Wl,--dynamic-linker,$interp,-rpath,$dir"
                    lappend opts "additional_flags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"
                    if {$binsepdebug != "NO"} {
                        lappend opts {debug}
                    }
                    if {$binpie == "YES"} {
                        lappend opts {additional_flags=-fPIE -pie}
                    }
                    if {[build_executable ${test}.exp [file tail $exec] $srcfile $opts] == -1} {
                        continue;
                    }
                    if {$binsepdebug == "SEP"} {
                        gdb_gnu_strip_debug $exec
                        # Just a sanity check.  As gdb_gnu_strip_debug uses the
                        # "[file dirname $exec]/.debug/[file tail $exec].debug"
                        # variant delete the higher-priority exec.debug file.
                        file delete "$exec.debug"
                    }

                    # Supply a self-sufficent directory $dir with the required
                    # libraries.  To make an executable properly prelinked all
                    # its dependencies on libraries must be also prelinked.  If
                    # some of the system libraries is currently not prelinked
                    # we have no right to prelink (modify it) at its current
                    # system place.

                    file delete -force $dir
                    file mkdir $dir

                    set command "ldd $exec"
                    set test "ldd [file tail $exec]"
                    set result [catch "exec $command" output]
                    verbose -log "result of $command is $result"
                    verbose -log "output of $command is $output"
                    if {$result != 0 || $output == ""} {
                        fail $test
                    } else {
                        pass $test
                    }

                    # gdb testsuite will put there also needless -lm.
                    set test "$test output contains libc"
                    set libc [regexp -all -inline -line {^.* => (/[^ ]+).*$} $output]
                    if {[llength $libc] == 0} {
                        fail $test
                    } else {
                        pass $test
                    }

                    set dests {}
                    for {set i 1} {$i < [llength $libc]} {incr i 2} {
                        set abspath [lindex $libc $i]
                        set dest "$dir/[file tail $abspath]"
                        copy $abspath $dest
                        lappend dests $dest
                    }

                    if {[prelink$binprelink "--dynamic-linker=$interp --ld-library-path=$dir $exec $interp [concat $dests]" [file tail $exec]]
                        && [copy $interp_saved $interp]} {
                        test_ld $exec 1 [expr {$binsepdebug == "NO"}]
                    }
                }
            }
        }

        file delete $interp_saved
    }
}
set pf_prefix $old_ldprefix