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# Simulator dejagnu utilities.

# Communicate simulator path from sim_init to sim_version.
# For some reason [board_info target sim] doesn't work in sim_version.
# [Presumubly because the target has been "popped" by then.  Odd though.]
set sim_path "unknown-run"

# Initialize the testrun.
# Required by dejagnu.

proc sim_init { args } {
    global sim_path
    set sim_path [board_info target sim]
    # Need to return an empty string (copied from GAS).
    return ""
}

# Print the version of the simulator being tested.
# Required by dejagnu.

proc sim_version {} {
    global sim_path
    set version 0.5
    clone_output "$sim_path $version\n"
}

# Cover function to target_compile.
# Copied from gdb_compile.

proc sim_compile { source dest type options } {
    set result [target_compile $source $dest $type $options]
    regsub "\[\r\n\]*$" "$result" "" result
    regsub "^\[\r\n\]*" "$result" "" result
    if { $result != "" } {
        clone_output "sim compile output: $result"
    }
    return $result
}

# Run a program on the simulator.
# Required by dejagnu (at least ${tool}_run used to be).
#
# SIM_OPTS are options for the simulator.
# PROG_OPTS are options passed to the simulated program.
# At present REDIR must be "" or "> foo".
# OPTIONS is a list of options internal to this routine.
# This is modelled after target_compile.  We want to be able to add new
# options without having to update all our users.
# Currently:
#       env(foo)=val    - set environment variable foo to val for this run
#       timeout=val     - set the timeout to val for this run
#
# The result is a list of two elements.
# The first is one of pass/fail/etc.
# The second is the program's output.
#
# This is different than the sim_load routine provided by
# dejagnu/config/sim.exp.  It's not clear how to pass arguments to the
# simulator (not the simulated program, the simulator) with sim_load.

proc sim_run { prog sim_opts prog_opts redir options } {
    global SIMFLAGS

    # Set the default value of the timeout.
    # FIXME: The timeout value we actually want is a function of
    # host, target, and testcase.
    set testcase_timeout [board_info target sim_time_limit]
    if { "$testcase_timeout" == "" } {
        set testcase_timeout [board_info host testcase_timeout]
    }
    if { "$testcase_timeout" == "" } {
        set testcase_timeout 240 ;# 240 same as in dejagnu/config/sim.exp.
    }

    # Initial the environment we pass to the testcase.
    set testcase_env ""

    # Process OPTIONS ...
    foreach o $options {
        if [regexp {^env\((.*)\)=(.*)} $o full var val] {
            set testcase_env "$testcase_env $var=$val"
        } elseif [regexp {^timeout=(.*)} $o full val] {
            set testcase_timeout $val
        }
        
    }
        
    verbose "testcase timeout is set to $testcase_timeout" 1

    set sim [board_info target sim]

    if [is_remote host] {
        set prog [remote_download host $prog]
        if { $prog == "" } {
            error "download failed"
            return -1
        }
    }

    set board [target_info name]
    if [board_info $board exists sim,options] {
        set always_opts [board_info $board sim,options]
    } else {
        set always_opts ""
    }

    # FIXME: this works for UNIX only
    if { "$testcase_env" != "" } {
        set sim "env $testcase_env $sim"
    }

    if { [board_info target sim,protocol] == "sid" } {
        set cmd ""
        set sim_opts "$sim_opts -e \"set cpu-loader file [list ${prog}]\""
    } else {
        set cmd "$prog"
    }

    send_log "$sim $always_opts $SIMFLAGS $sim_opts $cmd $prog_opts\n"

    if { "$redir" == "" } {
        remote_spawn host "$sim $always_opts $SIMFLAGS $sim_opts $cmd $prog_opts"
    } else {
        remote_spawn host "$sim $always_opts $SIMFLAGS $sim_opts $cmd $prog_opts $redir" writeonly
    }
    set result [remote_wait host $testcase_timeout]

    set return_code [lindex $result 0]
    set output [lindex $result 1]
    # Remove the \r part of "\r\n" so we don't break all the patterns
    # we want to match.
    regsub -all -- "\r" $output "" output

    if [is_remote host] {
        # clean up after ourselves.
        remote_file host delete $prog
    }

    # ??? Not sure the test for pass/fail is right.
    # We just care that the simulator ran correctly, not whether the simulated
    # program return 0 or non-zero from `main'.
    set status fail
    if { $return_code == 0 } {
        set status pass
    }

    return [list $status $output]
}

# Run testcase NAME.
# NAME is either a fully specified file name, or just the file name in which
# case $srcdir/$subdir will be prepended.
# REQUESTED_MACHS is a list of machines to run the testcase on.  If NAME isn't
# for the specified machine(s), it is ignored.
# Typically REQUESTED_MACHS contains just one element, it is up to the caller
# to iterate over the desired machine variants.
#
# The file can contain options in the form "# option(mach list): value".
# Possibilities:
# mach: [all | machine names]
# as[(mach-list)]: <assembler options>
# ld[(mach-list)]: <linker options>
# sim[(mach-list)]: <simulator options>
# output: program output pattern to match with string-match
# xerror: program is expected to return with a "failure" exit code
# xfail: <PRMS-opt> <target-triplets-where-test-fails>
# kfail: <PRMS> <target-triplets-where-test-fails>
# If `output' is not specified, the program must output "pass" if !xerror or
# "fail" if xerror.
# The parens in "optname()" are optional if the specification is for all machs.
# Multiple "output", "xfail" and "kfail" options concatenate.
# The xfail and kfail arguments are space-separated target triplets and PRIDs.
# There must be a PRMS (bug report ID) specified for kfail, while it's
# optional for xfail.

proc run_sim_test { name requested_machs } {
    global subdir srcdir
    global SIMFLAGS
    global opts
    global cpu_option
    global global_as_options
    global global_ld_options
    global global_sim_options

    if [string match "*/*" $name] {
        set file $name
        set name [file tail $name]
    } else {
        set file "$srcdir/$subdir/$name"
    }

    set opt_array [slurp_options "${file}"]
    if { $opt_array == -1 } {
        unresolved $subdir/$name
        return
    }
    # Clear default options
    set opts(as) ""
    set opts(ld) ""
    set opts(sim) ""
    set opts(output) ""
    set opts(mach) ""
    set opts(timeout) ""
    set opts(xerror) "no"
    set opts(xfail) ""
    set opts(kfail) ""

    if ![info exists global_as_options] {
        set global_as_options ""
    }
    if ![info exists global_ld_options] {
        set global_ld_options ""
    }
    if ![info exists global_sim_options] {
        set global_sim_options ""
    }

    # Clear any machine specific options specified in a previous test case
    foreach m $requested_machs {
        if [info exists opts(as,$m)] {
            unset opts(as,$m)
        }
        if [info exists opts(ld,$m)] {
            unset opts(ld,$m)
        }
        if [info exists opts(sim,$m)] {
            unset opts(sim,$m)
        }
    }

    foreach i $opt_array {
        set opt_name [lindex $i 0]
        set opt_machs [lindex $i 1]
        set opt_val [lindex $i 2]
        if ![info exists opts($opt_name)] {
            perror "unknown option $opt_name in file $file"
            unresolved $subdir/$name
            return
        }
        # Multiple "output" specifications concatenate, they don't override.
        if { $opt_name == "output" } {
            set opt_val "$opts(output)$opt_val"
        }
        # Similar with "xfail" and "kfail", but arguments are space-separated.
        if { $opt_name == "xfail" || $opt_name == "kfail" } {
            set opt_val "$opts($opt_name) $opt_val"
        }

        foreach m $opt_machs {
            set opts($opt_name,$m) $opt_val
        }
        if { "$opt_machs" == "" } {
            set opts($opt_name) $opt_val
        }
    }

    set testname $name
    set sourcefile $file
    if { $opts(output) == "" } {
        if { "$opts(xerror)" == "no" } {
            set opts(output) "pass\n"
        } else {
            set opts(output) "fail\n"
        }
    }
    # Change \n sequences to newline chars.
    regsub -all "\\\\n" $opts(output) "\n" opts(output)

    set testcase_machs $opts(mach)
    if { "$testcase_machs" == "all" } {
        set testcase_machs $requested_machs
    }

    foreach mach $testcase_machs {
        if { [lsearch $requested_machs $mach] < 0 } {
            verbose -log "Skipping $mach version of $name, not requested."
            continue
        }

        verbose -log "Testing $name on machine $mach."

        # Time to setup xfailures and kfailures.
        if { "$opts(xfail)" != "" } {
            verbose -log "xfail: $opts(xfail)"
            # Using eval to make $opts(xfail) appear as individual
            # arguments.
            eval setup_xfail $opts(xfail)
        }
        if { "$opts(kfail)" != "" } {
            verbose -log "kfail: $opts(kfail)"
            eval setup_kfail $opts(kfail)
        }

        if ![info exists opts(as,$mach)] {
            set opts(as,$mach) $opts(as)
        }

        set as_options "$opts(as,$mach) -I$srcdir/$subdir"
        if [info exists cpu_option] {
            set as_options "$as_options $cpu_option=$mach"
        }
        set comp_output [target_assemble $sourcefile ${name}.o "$as_options $global_as_options"]

        if ![string match "" $comp_output] {
            verbose -log "$comp_output" 3
            fail "$mach $testname (assembling)"
            continue
        }

        if ![info exists opts(ld,$mach)] {
            set opts(ld,$mach) $opts(ld)
        }

        set comp_output [target_link ${name}.o ${name}.x "$opts(ld,$mach) $global_ld_options"]

        if ![string match "" $comp_output] {
            verbose -log "$comp_output" 3
            fail "$mach $testname (linking)"
            continue
        }

        # If no machine specific options, default to the general version.
        if ![info exists opts(sim,$mach)] {
            set opts(sim,$mach) $opts(sim)
        }

        # Build the options argument.
        set options ""
        if { "$opts(timeout)" != "" } {
            set options "$options timeout=$opts(timeout)"
        }

        set result [sim_run ${name}.x "$opts(sim,$mach) $global_sim_options" "" "" "$options"]
        set status [lindex $result 0]
        set output [lindex $result 1]

        if { "$status" == "pass" } {
            if { "$opts(xerror)" == "no" } {
                if [string match $opts(output) $output] {
                    pass "$mach $testname"
                    file delete ${name}.o ${name}.x
                } else {
                    verbose -log "output:  $output" 3
                    verbose -log "pattern: $opts(output)" 3
                    fail "$mach $testname (execution)"
                }
            } else {
                verbose -log "`pass' return code when expecting failure" 3
                fail "$mach $testname (execution)"
            }
        } elseif { "$status" == "fail" } {
            if { "$opts(xerror)" == "no" } {
                fail "$mach $testname (execution)"
            } else {
                if [string match $opts(output) $output] {
                    pass "$mach $testname"
                    file delete ${name}.o ${name}.x
                } else {
                    verbose -log "output:  $output" 3
                    verbose -log "pattern: $opts(output)" 3
                    fail "$mach $testname (execution)"
                }
            }
        } else {
            $status "$mach $testname"
        }
    }
}

# Subroutine of run_sim_test to process options in FILE.

proc slurp_options { file } {
    if [catch { set f [open $file r] } x] {
        #perror "couldn't open `$file': $x"
        perror "$x"
        return -1
    }
    set opt_array {}
    # whitespace expression
    set ws  {[  ]*}
    set nws {[^         ]*}
    # whitespace is ignored anywhere except within the options list;
    # option names are alphabetic only
    set pat "^#${ws}(\[a-zA-Z\]*)\\(?(\[^):\]*)\\)?$ws:${ws}(.*)$ws\$"
    # Allow arbitrary lines until the first option is seen.
    set seen_opt 0
    while { [gets $f line] != -1 } {
        set line [string trim $line]
        # Whitespace here is space-tab.
        if [regexp $pat $line xxx opt_name opt_machs opt_val] {
            # match!
            lappend opt_array [list $opt_name $opt_machs $opt_val]
            set seen_opt 1
        } else {
            if { $seen_opt } {
                break
            }
        }
    }
    close $f
    return $opt_array
}