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# 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 .

# This test only works on GNU/Linux.

if { ![isnative] || [is_remote host] || ![istarget *-linux*] || [skip_shlib_tests]} {

    continue

}

load_lib prelink-support.exp

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 the new library gets copied by build_executable_own_libs.

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

}

# 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 {arg {name ""}} {

    return [prelink_no $arg $name]

}

proc prelinkYES {arg {name ""}} {

    return [prelink_yes $arg $name]

}

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.

# DISPLACEMENT can be "NONE", "ZERO" or "NONZERO"

proc reach {func command displacement} {

    global gdb_prompt expect_out

    global pf_prefix

    set old_ldprefix $pf_prefix

    lappend pf_prefix "reach-$func:"

    if [gdb_breakpoint $func allow-pending] {

        set test "reach"

        set test_displacement "seen displacement message as $displacement"

        gdb_test_multiple $command $test {

            -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {

                # Missing "$gdb_prompt $" is intentional.

                if {$expect_out(1,string) == "0x0"} {

                    set case "ZERO"

                } else {

                    set case "NONZERO"

                }

                if {$displacement == $case} {

                    pass $test_displacement

                    set displacement "FOUND-$displacement"

                } else {

                    fail $test_displacement

                }

                exp_continue

            }

            -re "Breakpoint \[0-9\]+, $func \\(.*\\) at .*:\[0-9\]+\r\n.*$gdb_prompt $" {

                pass $test

            }

            -re "Breakpoint \[0-9\]+, \[0-9xa-f\]+ in $func \\(\\).*\r\n$gdb_prompt $" {

                pass $test

            }

        }

        if ![regexp {^(NONE|FOUND-.*)$} $displacement] {

            fail $test_displacement

        }

    }

    set pf_prefix $old_ldprefix

}

proc test_core {file displacement} {

    global srcdir subdir gdb_prompt expect_out

    set corefile [core_find $file {} "segv"]

    if {$corefile == ""} {

        return

    }

    global pf_prefix

    set old_ldprefix $pf_prefix

    lappend pf_prefix "core:"

    gdb_exit

    gdb_start

    # Clear it to never find any separate debug infos in $debug_root.

    gdb_test_no_output "set debug-file-directory" \

        "set debug-file-directory for core"

    gdb_reinitialize_dir $srcdir/$subdir

    gdb_load $file

    # Print the "PIE (Position Independent Executable) displacement" message.

    gdb_test_no_output "set verbose on"

    set test "core loaded"

    set test_displacement "seen displacement message as $displacement"

    gdb_test_multiple "core-file $corefile" $test {

        -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {

            # Missing "$gdb_prompt $" is intentional.

            if {$expect_out(1,string) == "0x0"} {

                set case "ZERO"

            } else {

                set case "NONZERO"

            }

            if {$displacement == $case} {

                pass $test_displacement

                set displacement "FOUND-$displacement"

            } else {

                fail $test_displacement

            }

            exp_continue

        }

        -re "Core was generated by .*\r\n#0 .*$gdb_prompt $" {

            # Do not check the binary filename as it may be truncated.

            pass $test

        }

    }

    if ![regexp {^(NONE|FOUND-.*)$} $displacement] {

        fail $test_displacement

    }

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

    set pf_prefix $old_ldprefix

}

proc test_attach_gdb {file pid displacement prefix} {

    global gdb_prompt expect_out

    global pf_prefix

    set old_ldprefix $pf_prefix

    lappend pf_prefix "$prefix:"

    gdb_exit

    gdb_start

    # Print the "PIE (Position Independent Executable) displacement" message.

    gdb_test_no_output "set verbose on"

    if {$file != ""} {

        gdb_test "file $file" "Reading symbols from .*done\\." "file"

    }

    set test "attach"

    gdb_test_multiple "attach $pid" $test {

        -re "Attaching to (program: .*, )?process $pid\r\n" {

            # Missing "$gdb_prompt $" is intentional.

            pass $test

        }

    }

    set test "attach final prompt"

    set test_displacement "seen displacement message as $displacement"

    gdb_test_multiple "" $test {

        -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {

            # Missing "$gdb_prompt $" is intentional.

            if {$expect_out(1,string) == "0x0"} {

                set case "ZERO"

            } else {

                set case "NONZERO"

            }

            if {$displacement == $case} {

                pass $test_displacement

                set displacement "FOUND-$displacement"

            } else {

                fail $test_displacement

            }

            exp_continue

        }

        -re "$gdb_prompt $" {

            pass $test

        }

    }

    if ![regexp {^(NONE|FOUND-.*)$} $displacement] {

        fail $test_displacement

    }

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

    gdb_exit

    set pf_prefix $old_ldprefix

}

proc test_attach {file displacement {relink_args ""}} {

    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

        }

    }

    if {$relink_args == ""} {

        test_attach_gdb "" $pid $displacement "attach"

    } else {

        # These could be rather passed as arguments.

        global exec interp_saved interp

        foreach relink {YES NO} {

            # Formerly this test was testing only prelinking of $EXEC.  As the

            # prelink command automatically prelinks all of $EXEC's libraries,

            # even $INTERP got prelinked.  Therefore, we formerly had to

            # `[file_copy $interp_saved $interp]' to make $INTERP not affected

            # by this prelinking of $EXEC.

            #

            # But now we need to test even prelinking of $INTERP.  We could

            # create a separate test to test just the $INTERP prelinking.  For

            # test simplicity, we merged this test and the test above by not

            # restoring $INTERP after $EXEC prelink.  $INTERP gets restored

            # later below.

            if [prelink$relink $relink_args [file tail $exec]] {

                # /proc/PID/exe cannot be loaded as it is "EXECNAME (deleted)".

                test_attach_gdb $exec $pid $displacement "attach-relink$relink"

            }

        }

        file_copy $interp_saved $interp

    }

    remote_exec host "kill -9 $pid"

}

proc test_ld {file ifmain trynosym displacement} {

    global srcdir subdir gdb_prompt expect_out

    # 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_no_output "set debug-file-directory"

    gdb_reinitialize_dir $srcdir/$subdir

    gdb_load $file

    # Print the "PIE (Position Independent Executable) displacement" message.

    gdb_test_no_output "set verbose on"

    # We want to test the re-run of a PIE in the case where the executable

    # is loaded with a different displacement, but disable-randomization

    # prevents that from happening.  So turn it off.

    gdb_test "set disable-randomization off"

    reach "dl_main" "run segv" $displacement

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

    if $ifmain {

        reach "main" continue "NONE"

        reach "libfunc" continue "NONE"

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

    }

    # Try re-run if the new PIE displacement takes effect.

    gdb_test "kill" "" "kill" {Kill the program being debugged\? \(y or n\) } "y"

    reach "dl_main" "run segv" $displacement

    if $ifmain {

        test_core $file $displacement

        test_attach $file $displacement

    }

    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_no_output "set debug-file-directory"

    gdb_reinitialize_dir $srcdir/$subdir

    # Print the "PIE (Position Independent Executable) displacement" message.

    gdb_test_no_output "set verbose on"

    # 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 $displacement

        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.

        set test "ld.so exit"

        set test_displacement "seen displacement message as $displacement"

        gdb_test_multiple "run" $test {

            -re "Using PIE \\(Position Independent Executable\\) displacement (0x\[0-9a-f\]+) " {

                # Missing "$gdb_prompt $" is intentional.

                if {$expect_out(1,string) == "0x0"} {

                    set case "ZERO"

                } else {

                    set case "NONZERO"

                }

                if {$displacement == $case} {

                    pass $test_displacement

                    set displacement "FOUND-$displacement"

                } else {

                    fail $test_displacement

                }

                exp_continue

            }

            -re "Program exited (normally|with code \[0-9\]+)\\.\r\n$gdb_prompt $" {

                # Do not check the binary filename as it may be truncated.

                pass $test

            }

        }

        if ![regexp {^(NONE|FOUND-.*)$} $displacement] {

            fail $test_displacement

        }

    }

    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"} {

            file_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 == ""} {

            file_copy $interp_system $interp

        } elseif {$ldsepdebug == "IN" && $interp_system_debug != ""} {

            file_copy $interp_system $interp

            file_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 == ""} {

            file_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 != ""} {

            file_copy $interp_system $interp

            file_copy $interp_system_debug "${interp}.debug"

        }

        if {$ldsepdebug == "SEP"} {

            if ![prelinkNO "${interp}.debug"] {

                continue

            }

        } else {

            file delete "${interp}.debug"

        }

        if ![prelink$ldprelink $interp] {

            continue

        }

        if {$ldprelink == "NO"} {

            set displacement "NONZERO"

        } else {

            set displacement "ZERO"

        }

        test_ld $interp 0 [expr {$ldsepdebug == "NO"}] $displacement

        if ![file_copy $interp $interp_saved] {

            continue

        }

        set old_binprefix $pf_prefix

        foreach binprelink {NO YES} {

            foreach binsepdebug {NO IN SEP} {

                # "ATTACH" is like "YES" but it is modified during run.

                # It cannot be used for problem reproducibility after the

                # testcase ends.

                foreach binpie {NO YES ATTACH} {

                    # 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 pf_prefix $old_binprefix

                    lappend pf_prefix "$binname:"

                    set opts "additional_flags=-Wl,$binfile_lib,-rpath,[file dirname $binfile_lib]"

                    if {$binsepdebug != "NO"} {

                        lappend opts {debug}

                    }

                    if {$binpie != "NO"} {

                        lappend opts {additional_flags=-fPIE -pie}

                    }

                    set dir ${exec}.d

                    set relink_args [build_executable_own_libs ${test}.exp [file tail $exec] $srcfile $opts $interp $dir]

                    if {$relink_args == ""} {

                        continue;

                    }

                    if {$binsepdebug == "SEP"} {

                        gdb_gnu_strip_debug $exec

                    }

                    if {$binpie == "NO"} {

                        set displacement "NONE"

                    } elseif {$binprelink == "NO"} {

                        set displacement "NONZERO"

                    } else {

                        set displacement "ZERO"

                    }

                    if {[prelink$binprelink $relink_args [file tail $exec]]

                        && [file_copy $interp_saved $interp]} {

                        if {$binpie != "ATTACH"} {

                            test_ld $exec 1 [expr {$binsepdebug == "NO"}] $displacement

                        } else {

                            # If the file has been randomly prelinked it must

                            # be "NONZERO".  We could see "ZERO" only if it was

                            # unprelinked and it is now running at the same

                            # address - which is 0 but executable can never run

                            # at address 0.

                            set displacement "NONZERO"

                            test_attach $exec $displacement $relink_args

                            # ATTACH means that executables and libraries have

                            # been modified after they have been run.  They

                            # cannot be reused for problem reproducibility after

                            # the testcase ends in the ATTACH case.  Therefore

                            # they are rather deleted not to confuse after the

                            # run finishes.

                            set exec_debug [system_debug_get $exec]

                            if {$exec_debug != ""} {

                                # `file delete [glob "${exec_debug}*"]' does not work.

                                foreach f [glob "${exec_debug}*"] {

                                    file delete $f

                                }

                            }

                            file delete -force $dir

                            # `file delete [glob "${exec}*"]' does not work.

                            foreach f [glob "${exec}*"] {

                                file delete $f

                            }

                        }

                    }

                }

            }

        }

        file delete $interp_saved

    }

}

set pf_prefix $old_ldprefix