gdb.exp

lwip在ucos上的移植

# Copyright (C) 1992, 1994, 1995, 1997, 1999 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:
# [e-mail]

# This file was written by Fred Fish. ([e-mail])

# Generic gdb subroutines that should work for any target.  If these
# need to be modified for any target, it can be done with a variable
# or by passing arguments.

load_lib libgloss.exp

global GDB
global CHILL_LIB
global CHILL_RT0

if ![info exists CHILL_LIB] {
    set CHILL_LIB [findfile $base_dir/../../gcc/ch/runtime/libchill.a "$base_dir/../../gcc/ch/runtime/libchill.a" [transform -lchill]]
}
verbose "using CHILL_LIB = $CHILL_LIB" 2
if ![info exists CHILL_RT0] {
    set CHILL_RT0 [findfile $base_dir/../../gcc/ch/runtime/chillrt0.o "$base_dir/../../gcc/ch/runtime/chillrt0.o" ""]
}
verbose "using CHILL_RT0 = $CHILL_RT0" 2

if [info exists TOOL_EXECUTABLE] {
    set GDB $TOOL_EXECUTABLE;
}
if ![info exists GDB] {
    if ![is_remote host] {
	set GDB [findfile $base_dir/../../gdb/gdb "$base_dir/../../gdb/gdb" [transform gdb]]
    } else {
	set GDB [transform gdb];
    }
}
verbose "using GDB = $GDB" 2

global GDBFLAGS
if ![info exists GDBFLAGS] {
    set GDBFLAGS "-nx"
}
verbose "using GDBFLAGS = $GDBFLAGS" 2

# The variable gdb_prompt is a regexp which matches the gdb prompt.
# Set it if it is not already set.
global gdb_prompt
if ![info exists gdb_prompt] then {
    set gdb_prompt "\[(\]gdb\[)\]"
}

### Only procedures should come after this point.

#
# gdb_version -- extract and print the version number of GDB
#
proc default_gdb_version {} {
    global GDB
    global GDBFLAGS
    global gdb_prompt
    set fileid [open "gdb_cmd" w];
    puts $fileid "q";
    close $fileid;
    set cmdfile [remote_download host "gdb_cmd"];
    set output [remote_exec host "$GDB -nw --command $cmdfile"]
    remote_file build delete "gdb_cmd";
    remote_file host delete "$cmdfile";
    set tmp [lindex $output 1];
    set version ""
    regexp " \[0-9\]\[^ \t\n\r\]+" "$tmp" version
    if ![is_remote host] {
	clone_output "[which $GDB] version $version $GDBFLAGS\n"
    } else {
	clone_output "$GDB on remote host version $version $GDBFLAGS\n"
    }
}

proc gdb_version { } {
    return [default_gdb_version];
}

#
# gdb_unload -- unload a file if one is loaded
#

proc gdb_unload {} {
    global verbose
    global GDB
    global gdb_prompt
    send_gdb "file\n"
    gdb_expect 60 {
	-re "No executable file now\[^\r\n\]*\[\r\n\]" { exp_continue }
	-re "No symbol file now\[^\r\n\]*\[\r\n\]" { exp_continue }
	-re "A program is being debugged already..*Kill it.*y or n. $"\
	    { send_gdb "y\n"
		verbose "\t\tKilling previous program being debugged"
	    exp_continue
	}
	-re "Discard symbol table from .*y or n.*$" {
	    send_gdb "y\n"
	    exp_continue
	}
	-re "$gdb_prompt $" {}
	timeout {
	    perror "couldn't unload file in $GDB (timed out)."
	    return -1
	}
    }
}

# Many of the tests depend on setting breakpoints at various places and
# running until that breakpoint is reached.  At times, we want to start
# with a clean-slate with respect to breakpoints, so this utility proc 
# lets us do this without duplicating this code everywhere.
#

proc delete_breakpoints {} {
    global gdb_prompt

    # we need a larger timeout value here or this thing just confuses
    # itself.  May need a better implementation if possible. - guo
    #
    send_gdb "delete breakpoints\n"
    gdb_expect 100 {
	 -re "Delete all breakpoints.*y or n.*$" {
	    send_gdb "y\n";
	    exp_continue
	}
	 -re "$gdb_prompt $" { # This happens if there were no breakpoints
	    }
	 timeout { perror "Delete all breakpoints in delete_breakpoints (timeout)" ; return }
    }
    send_gdb "info breakpoints\n"
    gdb_expect 100 {
	 -re "No breakpoints or watchpoints..*$gdb_prompt $" {}
	 -re "$gdb_prompt $" { perror "breakpoints not deleted" ; return }
	 -re "Delete all breakpoints.*or n.*$" {
	    send_gdb "y\n";
	    exp_continue
	}
	 timeout { perror "info breakpoints (timeout)" ; return }
    }
}


#
# Generic run command.
#
# The second pattern below matches up to the first newline *only*.
# Using ``.*$'' could swallow up output that we attempt to match
# elsewhere.
#
proc gdb_run_cmd {args} {
    global gdb_prompt

    if [target_info exists gdb_init_command] {
	send_gdb "[target_info gdb_init_command]\n";
	gdb_expect 30 {
	    -re "$gdb_prompt $" { }
	    default {
		perror "gdb_init_command for target failed";
		return;
	    }
	}
    }

    if [target_info exists use_gdb_stub] {
	if [target_info exists gdb,do_reload_on_run] {
	    # Specifying no file, defaults to the executable
	    # currently being debugged.
	    if { [gdb_load ""] < 0 } {
		return;
	    }
	    send_gdb "continue\n";
	    gdb_expect 60 {
		-re "Continu\[^\r\n\]*\[\r\n\]" {}
		default {}
	    }
	    return;
	}

	if [target_info exists gdb,start_symbol] {
	    set start [target_info gdb,start_symbol];
	} else {
	    set start "start";
	}
	send_gdb  "jump *$start\n"
	set start_attempt 1;
	while { $start_attempt } {
	    # Cap (re)start attempts at three to ensure that this loop
	    # always eventually fails.  Don't worry about trying to be
	    # clever and not send a command when it has failed.
	    if [expr $start_attempt > 3] {
		perror "Jump to start() failed (retry count exceeded)";
		return;
	    }
	    set start_attempt [expr $start_attempt + 1];
	    gdb_expect 30 {
		-re "Continuing at \[^\r\n\]*\[\r\n\]" {
		    set start_attempt 0;
		}
		-re "No symbol \"_start\" in current.*$gdb_prompt $" {
		    perror "Can't find start symbol to run in gdb_run";
		    return;
		}
		-re "No symbol \"start\" in current.*$gdb_prompt $" {
		    send_gdb "jump *_start\n";
		}
		-re "No symbol.*context.*$gdb_prompt $" {
		    set start_attempt 0;
		}
		-re "Line.* Jump anyway.*y or n. $" {
		    send_gdb "y\n"
		}
		-re "The program is not being run.*$gdb_prompt $" {
		    if { [gdb_load ""] < 0 } {
			return;
		    }
		    send_gdb "jump *$start\n";
		}
		timeout {
		    perror "Jump to start() failed (timeout)"; 
		    return
		}
	    }
	}
	if [target_info exists gdb_stub] {
	    gdb_expect 60 {
		-re "$gdb_prompt $" {
		    send_gdb "continue\n"
		}
	    }
	}
	return
    }
    send_gdb "run $args\n"
# This doesn't work quite right yet.
    gdb_expect 60 {
	-re "The program .* has been started already.*y or n. $" {
	    send_gdb "y\n"
	    exp_continue
	}
	-re "Starting program: \[^\r\n\]*" {}
    }
}

proc gdb_breakpoint { function } {
    global gdb_prompt
    global decimal

    send_gdb "break $function\n"
    # The first two regexps are what we get with -g, the third is without -g.
    gdb_expect 30 {
	-re "Breakpoint \[0-9\]* at .*: file .*, line $decimal.\r\n$gdb_prompt $" {}
	-re "Breakpoint \[0-9\]*: file .*, line $decimal.\r\n$gdb_prompt $" {}
	-re "Breakpoint \[0-9\]* at .*$gdb_prompt $" {}
	-re "$gdb_prompt $" { fail "setting breakpoint at $function" ; return 0 }
	timeout { fail "setting breakpoint at $function (timeout)" ; return 0 }
    }
    return 1;
}    

# Set breakpoint at function and run gdb until it breaks there.
# Since this is the only breakpoint that will be set, if it stops
# at a breakpoint, we will assume it is the one we want.  We can't
# just compare to "function" because it might be a fully qualified,
# single quoted C++ function specifier.

proc runto { function } {
    global gdb_prompt
    global decimal

    delete_breakpoints

    if ![gdb_breakpoint $function] {
	return 0;
    }

    gdb_run_cmd
    
    # the "at foo.c:36" output we get with -g.
    # the "in func" output we get without -g.
    gdb_expect 30 {
	-re "Break.* at .*:$decimal.*$gdb_prompt $" {
	    return 1
	}
	-re "Breakpoint \[0-9\]*, \[0-9xa-f\]* in .*$gdb_prompt $" { 
	    return 1
	}
	-re "$gdb_prompt $" { 
	    fail "running to $function in runto"
	    return 0
	}
	timeout { 
	    fail "running to $function in runto (timeout)"
	    return 0
	}
    }
    return 1
}

#
# runto_main -- ask gdb to run until we hit a breakpoint at main.
#		The case where the target uses stubs has to be handled
#		specially--if it uses stubs, assuming we hit
#		breakpoint() and just step out of the function.
#
proc runto_main { } {
    global gdb_prompt
    global decimal

    if ![target_info exists gdb_stub] {
	return [runto main]
    }			

    delete_breakpoints

    gdb_step_for_stub;

    return 1
}


### Continue, and expect to hit a breakpoint.
### Report a pass or fail, depending on whether it seems to have
### worked.  Use NAME as part of the test name; each call to
### continue_to_breakpoint should use a NAME which is unique within
### that test file.
proc gdb_continue_to_breakpoint {name} {
    global gdb_prompt
    set full_name "continue to breakpoint: $name"

    send_gdb "continue\n"
    gdb_expect {
	-re "Breakpoint .* at .*\r\n$gdb_prompt $" {
	    pass $full_name
	}
	-re ".*$gdb_prompt $" {
	    fail $full_name
	}
	timeout { 
	    fail "$full_name (timeout)"
	}
    }
}



# gdb_test COMMAND PATTERN MESSAGE -- send a command to gdb; test the result.
#
# COMMAND is the command to execute, send to GDB with send_gdb.  If
#   this is the null string no command is sent.
# PATTERN is the pattern to match for a PASS, and must NOT include
#   the \r\n sequence immediately before the gdb prompt.
# MESSAGE is an optional message to be printed.  If this is
#   omitted, then the pass/fail messages use the command string as the
#   message.  (If this is the empty string, then sometimes we don't
#   call pass or fail at all; I don't understand this at all.)
#
# Returns:
#    1 if the test failed,
#    0 if the test passes,
#   -1 if there was an internal error.
#  
proc gdb_test { args } {
    global verbose
    global gdb_prompt
    global GDB
    upvar timeout timeout

    if [llength $args]>2 then {
	set message [lindex $args 2]
    } else {
	set message [lindex $args 0]
    }
    set command [lindex $args 0]
    set pattern [lindex $args 1]

    if [llength $args]==5 {
	set question_string [lindex $args 3];
	set response_string [lindex $args 4];
    } else {
	set question_string "^FOOBAR$"
    }

    if $verbose>2 then {
	send_user "Sending \"$command\" to gdb\n"
	send_user "Looking to match \"$pattern\"\n"
	send_user "Message is \"$message\"\n"
    }

    set result -1
    set string "${command}\n";
    if { $command != "" } {
	while { "$string" != "" } {
	    set foo [string first "\n" "$string"];
	    set len [string length "$string"];
	    if { $foo < [expr $len - 1] } {
		set str [string range "$string" 0 $foo];
		if { [send_gdb "$str"] != "" } {
		    global suppress_flag;

		    if { ! $suppress_flag } {
			perror "Couldn't send $command to GDB.";
		    }
		    fail "$message";
		    return $result;
		}
		# since we're checking if each line of the multi-line
		# command are 'accepted' by GDB here,
		# we need to set -notransfer expect option so that
		# command output is not lost for pattern matching
		# - guo
		gdb_expect -notransfer 2 {
		    -re "\[\r\n\]" { }
		    timeout { }
		}
		set string [string range "$string" [expr $foo + 1] end];
	    } else {
		break;
	    }
	}
	if { "$string" != "" } {
	    if { [send_gdb "$string"] != "" } {
		global suppress_flag;

		if { ! $suppress_flag } {
		    perror "Couldn't send $command to GDB.";
		}
		fail "$message";
		return $result;
	    }
	}
    }

    if [info exists timeout] {
	set tmt $timeout;
    } else {
	global timeout;
	if [info exists timeout] {
	    set tmt $timeout;
	} else {
	    set tmt 60;
	}
    }
    gdb_expect $tmt {
	 -re "\\*\\*\\* DOSEXIT code.*" {
	     if { $message != "" } {
		 fail "$message";
	     }
	     gdb_suppress_entire_file "GDB died";
	     return -1;
	 }
	 -re "Ending remote debugging.*$gdb_prompt $" {
	    if ![isnative] then {
		warning "Can`t communicate to remote target."
	    }
	    gdb_exit
	    gdb_start
	    set result -1
	}
	 -re "\[\r\n\]*($pattern)\[\r\n\]+$gdb_prompt $" {
	    if ![string match "" $message] then {
		pass "$message"
	    }
	    set result 0
	}
	 -re "(${question_string})$" {
	    send_gdb "$response_string\n";
	    exp_continue;
	}
	 -re "Undefined\[a-z\]* command:.*$gdb_prompt $" {
	    perror "Undefined command \"$command\"."
            fail "$message"
	    set result 1
	}
	 -re "Ambiguous command.*$gdb_prompt $" {
	    perror "\"$command\" is not a unique command name."
            fail "$message"
	    set result 1
	}
	 -re "Program exited with code \[0-9\]+.*$gdb_prompt $" {
	    if ![string match "" $message] then {
		set errmsg "$message: the program exited"
	    } else {
		set errmsg "$command: the program exited"
	    }
	    fail "$errmsg"
	    return -1
	}
	 -re "The program is not being run.*$gdb_prompt $" {
	    if ![string match "" $message] then {
		set errmsg "$message: the program is no longer running"
	    } else {
		set errmsg "$command: the program is no longer running"
	    }
	    fail "$errmsg"
	    return -1
	}
	 -re ".*$gdb_prompt $" {
	    if ![string match "" $message] then {
		fail "$message"
	    }
	    set result 1
	}
	 "<return>" {
	    send_gdb "\n"
	    perror "Window too small."
            fail "$message"
	}
	 -re "\\(y or n\\) " {
	    send_gdb "n\n"
	    perror "Got interactive prompt."
            fail "$message"
	}
	 eof {
	     perror "Process no longer exists"
	     if { $message != "" } {
		 fail "$message"
	     }
	     return -1
	}
	 full_buffer {
	    perror "internal buffer is full."
            fail "$message"
	}
	timeout	{
	    if ![string match "" $message] then {
		fail "$message (timeout)"
	    }
	    set result 1
	}
    }
    return $result
}

# Test that a command gives an error.  For pass or fail, return
# a 1 to indicate that more tests can proceed.  However a timeout
# is a serious error, generates a special fail message, and causes
# a 0 to be returned to indicate that more tests are likely to fail
# as well.

proc test_print_reject { args } {
    global gdb_prompt
    global verbose

    if [llength $args]==2 then {
	set expectthis [lindex $args 1]
    } else {
	set expectthis "should never match this bogus string"