binutils-gdb/gdb/testsuite/gdb.base/remote.exp

# Copyright 1999-2023 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/>.

# Test only on boards that actually use the remote protocol.
if {[target_info gdb_protocol] != "remote"
    && [target_info gdb_protocol] != "extended-remote"} {
    unsupported "requires remote protocol"
    return
}

standard_testfile .c

set result [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}]
if {$result != ""} {
    untested "failed to compile"
    return -1
}

gdb_start

# Make sure we're disconnected, in case we're testing with an
# extended-remote board, therefore already connected.
gdb_test "disconnect" ".*"

#
# Part ONE: Check the down load commands
#

gdb_test "show remote memory-write-packet-size" \
	"The memory-write-packet-size is 0 \\(default\\). The actual limit will be further reduced dependent on the target\." \
	"write-packet default"

gdb_test "set remote memory-write-packet-size" \
	"Argument required .integer, `fixed' or `limited'.\." \
	"set write-packet - NULL"

gdb_test_no_output "set remote memory-write-packet-size 20"
gdb_test "show remote memory-write-packet-size" \
	"The memory-write-packet-size is 20. The actual limit will be further reduced dependent on the target\." \
	"set write-packet - small"

gdb_test_no_output "set remote memory-write-packet-size 1"
gdb_test "show remote memory-write-packet-size" \
	"The memory-write-packet-size is 1. The actual limit will be further reduced dependent on the target\." \
	"set write-packet - very-small"

gdb_test_no_output "set remote memory-write-packet-size 0"
gdb_test "show remote memory-write-packet-size" \
	"The memory-write-packet-size is 0 \\(default\\). The actual limit will be further reduced dependent on the target\." \
	"write-packet default again"

set test "set remote memory-write-packet-size fixed"
gdb_test_multiple $test $test {
    -re "Change the packet size. .y or n. " {
	gdb_test_multiple "y" $test {
	    -re "$gdb_prompt $" {
		pass $test
	    }
	}
    }
}
gdb_test "show remote memory-write-packet-size" \
	"The memory-write-packet-size is 0 \\(default\\). Packets are fixed at 16384 bytes\." \
	"write-packet default fixed"

gdb_test_no_output "set remote memory-write-packet-size limit"
gdb_test "show remote memory-write-packet-size" \
	"The memory-write-packet-size is 0 \\(default\\). The actual limit will be further reduced dependent on the target\." \
	"write-packet default limit again"

#
# Part TWO: Check the download behavior.
#

proc gdb_load_timed {executable class writesize} {
    global test gdb_prompt
    set test "timed download `[file tail $executable]' - $class, $writesize"

    if {$writesize != ""} {
	gdb_test_no_output "set remote memory-write-packet-size $writesize" \
	    "$test - set packet size"

	send_gdb "set remote memory-write-packet-size $class\n"
	gdb_expect 5 {
	    -re ".*Change the packet size.*$" {
		send_gdb "y\n"
		gdb_expect 5 {
		    -re ".*$gdb_prompt $" {
			pass "$test - set write size class"
		    }
		    timeout {
			fail "$test - set write size class"
			return
		    }
		}
	    }
	    -re ".*$gdb_prompt $" { }
	    timeout {
		fail "$test - set write size class"
		return
	    }
	}
    }

    # Do not try to load using fixed sizes; we may overflow the remote target.
    if { $class == "fixed" } {
	return
    }

    set load_begin_time [clock clicks]
    set result [gdb_load $executable]
    set load_end_time [clock clicks]
    if {$result != 0} {
	fail "$test - loading executable"
	return
    }
    verbose "$test - time [expr ($load_end_time - $load_begin_time) / 1000] ms"
    pass $test
}

clean_restart $binfile

# These download tests won't actually download anything on !is_remote
# target boards, but we run them anyway because it's simpler, and
# harmless.

# Typically about 400-1 bytes can be downloaded
gdb_load_timed $binfile "limit" 398
gdb_load_timed $binfile "limit" 400

# Absolute max is 16384
gdb_load_timed $binfile "fixed" 0
gdb_load_timed $binfile "fixed" 16385

# fall back to the default
gdb_load_timed $binfile "limit" 0

# Get size of data uploaded

#
# Query GDB for the size of various types
#

# Get the size of random_data table (defaults to 48K).
set sizeof_random_data [get_sizeof "random_data" 48*1024]

#
# Part THREE: Check the upload behavour
#
if {![runto_main]} {
    return
}

# Carefully check memory around each of the most common packet edge
# conditions

gdb_test "x/8ub random_data" \
	"<random_data>:\[ \t\]+60\[ \t\]+74\[ \t\]+216\[ \t\]+38\[ \t\]+149\[ \t\]+49\[ \t\]+207\[ \t\]+44"

gdb_test "x/8ub random_data + 400 - 4" \
	"<random_data\\+396>:\[ \t\]+185\[ \t\]+255\[ \t\]+50\[ \t\]+140\[ \t\]+237\[ \t\]+172\[ \t\]+143\[ \t\]+93"

if {$sizeof_random_data > 16380} {
    gdb_test "x/8ub random_data + 16384 - 4" \
	"<random_data\\+16380>:\[ \t\]+178\[ \t\]+180\[ \t\]+135\[ \t\]+93\[ \t\]+70\[ \t\]+62\[ \t\]+205\[ \t\]+76"
}

# Read a chunk just larger than the packet size (reduce the packet
# size to make life easier)
gdb_test_no_output "set remote memory-read-packet-size 16"

gdb_test "show remote memory-read-packet-size" \
	"The memory-read-packet-size is 16. Packets are limited to 20 bytes."
gdb_test "x/17ub random_data" \
	"<random_data>:\[ \t\]+60\[ \t\]+74\[ \t\]+216\[ \t\]+38\[ \t\]+149\[ \t\]+49\[ \t\]+207\[ \t\]+44.*<random_data\\+8>:\[ \t\]+124\[ \t\]+38\[ \t\]+93\[ \t\]+125\[ \t\]+232\[ \t\]+67\[ \t\]+228\[ \t\]+56.*<random_data\\+16>:\[ \t\]+161"

# Regression test for gdb/15289.  Make sure -1 is accepted and handled
# as "unlimited".
gdb_test_no_output "set remote hardware-watchpoint-limit -1"
gdb_test_no_output "set remote hardware-breakpoint-limit -1"

# This is just being thorough.  Assume (at least) a 32-bit host int,
# and make sure 32-bit INT_MAX is accepted by a zinteger command.
gdb_test_no_output "set remote hardware-watchpoint-limit 2147483647"
gdb_test_no_output "set remote hardware-breakpoint-limit 2147483647"

# Check the X/P/p alias commands display the correct packet names.
foreach pkt {X P p} {
    gdb_test "show remote ${pkt}-packet" "Support for the '${pkt}' packet on the current remote target is .*"
}

gdb_exit