mi-support.exp

gdb-6.0 linux 下的调试工具

# mi_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 mi_gdb_test { args } {
    global verbose
    global mi_gdb_prompt
    global GDB expect_out
    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;
		}
		gdb_expect 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.*$mi_gdb_prompt\[ \]*$" {
	    if ![isnative] then {
		warning "Can`t communicate to remote target."
	    }
	    gdb_exit
	    gdb_start
	    set result -1
	}
	 -re "\[\r\n\]*($pattern)\[\r\n\]+$mi_gdb_prompt\[ \]*$" {
	    if ![string match "" $message] then {
		pass "$message"
	    }
	    set result 0
	}
	 -re "(${question_string})$" {
	    send_gdb "$response_string\n";
	    exp_continue;
	}
	 -re "Undefined.* command:.*$mi_gdb_prompt\[ \]*$" {
	    perror "Undefined command \"$command\"."
            fail "$message"
	    set result 1
	}
	 -re "Ambiguous command.*$mi_gdb_prompt\[ \]*$" {
	    perror "\"$command\" is not a unique command name."
            fail "$message"
	    set result 1
	}
	 -re "Program exited with code \[0-9\]+.*$mi_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.*$mi_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 ".*$mi_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
}

#
# MI run command.  (A modified version of gdb_run_cmd)
#

# In patterns, the newline sequence ``\r\n'' is matched explicitly as
# ``.*$'' could swallow up output that we attempt to match elsewhere.

proc mi_run_cmd {args} {
    global suppress_flag
    if { $suppress_flag } {
	return -1
    }
    global mi_gdb_prompt

    if [target_info exists gdb_init_command] {
	send_gdb "[target_info gdb_init_command]\n";
	gdb_expect 30 {
	    -re "$mi_gdb_prompt$" { }
	    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 { [mi_gdb_load ""] < 0 } {
		return;
	    }
	    send_gdb "000-exec-continue\n";
	    gdb_expect 60 {
		-re "000\\^running\[\r\n\]+$mi_gdb_prompt$" {}
		default {}
	    }
	    return;
	}

	if [target_info exists gdb,start_symbol] {
	    set start [target_info gdb,start_symbol];
	} else {
	    set start "start";
	}

	# HACK: Should either use 000-jump or fix the target code
	# to better handle RUN.
	send_gdb  "jump *$start\n"
	warning "Using CLI jump command, expect run-to-main FAIL"
	return
    }

    send_gdb "000-exec-run $args\n"
    gdb_expect {
	-re "000\\^running\r\n${mi_gdb_prompt}" {
	}
	timeout {
	    perror "Unable to start target"
	    return
	}
    }
    # NOTE: Shortly after this there will be a ``000*stopping,...(gdb)''
}

#
# Just like run-to-main but works with the MI interface
#

proc mi_run_to_main { } {
    global suppress_flag
    if { $suppress_flag } {
	return -1
    }

    global srcdir
    global subdir
    global binfile
    global srcfile

    mi_delete_breakpoints
    mi_gdb_reinitialize_dir $srcdir/$subdir
    mi_gdb_load ${binfile}

    mi_runto main
}


# Just like gdb's "runto" proc, it will run the target to a given
# function.  The big difference here between mi_runto and mi_execute_to
# is that mi_execute_to must have the inferior running already.  This
# proc will (like gdb's runto) (re)start the inferior, too.
#
# FUNC is the linespec of the place to stop (it inserts a breakpoint here).
# It returns:
#   -1  if test suppressed, failed, timedout
#    0  if test passed

proc mi_runto {func} {
  global suppress_flag
  if { $suppress_flag } {
    return -1
  }

  global mi_gdb_prompt expect_out
  global hex decimal

  set test "mi runto $func"
  mi_gdb_test "200-break-insert $func" \
    "200\\^done,bkpt=\{number=\"\[0-9\]+\",type=\"breakpoint\",disp=\"keep\",enabled=\"y\",addr=\"$hex\",func=\"$func\",file=\".*\",line=\"\[0-9\]*\",times=\"0\"\}" \
    "breakpoint at $func"

  if {![regexp {number="[0-9]+"} $expect_out(buffer) str]
      || ![scan $str {number="%d"} bkptno]} {
    set bkptno {[0-9]+}
  }

  mi_run_cmd
  gdb_expect {
    -re ".*000\\*stopped,reason=\"breakpoint-hit\",bkptno=\"$bkptno\",thread-id=\"$decimal\",frame=\{addr=\"$hex\",func=\"$func\",args=\(\\\[.*\\\]\|\{.*\}\),file=\".*\",line=\"\[0-9\]*\"\}\r\n$mi_gdb_prompt$" {
      pass "$test"
      return 0
    }
    -re ".*$mi_gdb_prompt$" {
      fail "$test (2)"
    }
    timeout {
      fail "$test (timeout)"
      return -1
    }
  }
}


# Next to the next statement
# For return values, see mi_execute_to_helper

proc mi_next { test } {
  return [mi_next_to {.*} {.*} {.*} {.*} $test]
}


# Step to the next statement
# For return values, see mi_execute_to_helper

proc mi_step { test } {
  return [mi_step_to {.*} {.*} {.*} {.*} $test]
}

# cmd should not include the number or newline (i.e. "exec-step 3", not
# "220-exec-step 3\n"

# Can not match -re ".*\r\n${mi_gdb_prompt}", because of false positives
# after the first prompt is printed.

proc mi_execute_to_helper { cmd reason func args file line extra test } {
    global suppress_flag
    if { $suppress_flag } {
	return -1
    }
    global mi_gdb_prompt
    global hex
    global decimal
    send_gdb "220-$cmd\n"
    gdb_expect {
	-re ".*220\\^running\r\n${mi_gdb_prompt}.*220\\*stopped,reason=\"$reason\",thread-id=\"$decimal\",frame=\{addr=\"$hex\",func=\"$func\",args=$args,file=\".*$file\",line=\"$line\"\}$extra\r\n$mi_gdb_prompt$" {
	    pass "$test"
	    return 0
	}
	-re ".*220\\^running\r\n${mi_gdb_prompt}.*220\\*stopped,reason=\"$reason\",thread-id=\"$decimal\",frame=\{addr=\"$hex\",func=\".*\",args=\[\\\[\{\].*\[\\\]\}\],file=\".*\",line=\"\[0-9\]*\"\}.*\r\n$mi_gdb_prompt$" {
	    fail "$test (stopped at wrong place)"
	    return -1
	}
	-re "220\\^running\r\n${mi_gdb_prompt}.*\r\n${mi_gdb_prompt}$" {
	    fail "$test (unknown output after running)"
	    return -1
	}
	timeout {
	    fail "$test (timeout)"
	    return -1
	}
    }
}

proc mi_execute_to { cmd reason func args file line extra test } {
    mi_execute_to_helper "$cmd" "$reason" "$func" "\\\[$args\\\]" \
	"$file" "$line" "$extra" "$test"
}

proc mi_next_to { func args file line test } {
    mi_execute_to "exec-next" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi_step_to { func args file line test } {
    mi_execute_to "exec-step" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi_finish_to { func args file line result ret test } {
    mi_execute_to "exec-finish" "function-finished" "$func" "$args" \
	"$file" "$line" \
	",gdb-result-var=\"$result\",return-value=\"$ret\"" \
	"$test"
}

proc mi_continue_to { bkptno func args file line test } {
    mi_execute_to "exec-continue" "breakpoint-hit\",bkptno=\"$bkptno" \
	"$func" "$args" "$file" "$line" "" "$test"
}

proc mi0_execute_to { cmd reason func args file line extra test } {
    mi_execute_to_helper "$cmd" "$reason" "$func" "\{$args\}" \
	"$file" "$line" "$extra" "$test"
}

proc mi0_next_to { func args file line test } {
    mi0_execute_to "exec-next" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi0_step_to { func args file line test } {
    mi0_execute_to "exec-step" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi0_finish_to { func args file line result ret test } {
    mi0_execute_to "exec-finish" "function-finished" "$func" "$args" \
	"$file" "$line" \
	",gdb-result-var=\"$result\",return-value=\"$ret\"" \
	"$test"
}

proc mi0_continue_to { bkptno func args file line test } {
    mi0_execute_to "exec-continue" "breakpoint-hit\",bkptno=\"$bkptno" \
	"$func" "$args" "$file" "$line" "" "$test"
}