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# Copyright (C) 2014-2020 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
# 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 file is part of the GDB testsuite.
# It tests GDB provided ports.
load_lib gdb-guile.exp
if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
# Skip all tests if Guile scripting is not enabled.
if { [skip_guile_tests] } { continue }
if ![gdb_guile_runto_main] {
gdb_reinitialize_dir $srcdir/$subdir
gdb_scm_test_silent_cmd "guile (use-modules (rnrs io ports) (rnrs bytevectors))" \
"import (rnrs io ports) (rnrs bytevectors)"
gdb_test "guile (print (stdio-port? 42))" "= #f"
gdb_test "guile (print (stdio-port? (%make-void-port \"r\")))" "= #f"
gdb_test "guile (print (stdio-port? (input-port)))" "= #t"
gdb_test "guile (print (stdio-port? (output-port)))" "= #t"
gdb_test "guile (print (stdio-port? (error-port)))" "= #t"
# Test memory port open/close.
proc test_port { mode } {
with_test_prefix "basic $mode tests" {
gdb_test_no_output "guile (define my-port (open-memory #:mode \"$mode\"))" \
"create memory port"
gdb_test "guile (print (memory-port? my-port))" "= #t"
switch -glob $mode {
"r+*" {
gdb_test "guile (print (input-port? my-port))" "= #t"
gdb_test "guile (print (output-port? my-port))" "= #t"
"r*" {
gdb_test "guile (print (input-port? my-port))" "= #t"
gdb_test "guile (print (output-port? my-port))" "= #f"
"w*" {
gdb_test "guile (print (input-port? my-port))" "= #f"
gdb_test "guile (print (output-port? my-port))" "= #t"
default {
error "bad test mode"
gdb_test "guile (print (port-closed? my-port))" "= #f" \
"test port-closed? before it's closed"
gdb_test "guile (print (close-port my-port))" "= #t"
gdb_test "guile (print (port-closed? my-port))" "= #t" \
"test port-closed? after it's closed"
set port_variations { r w r+ rb wb r+b r0 w0 r+0 }
foreach variation $port_variations {
test_port $variation
# Test read/write of memory ports.
proc test_mem_port_rw { kind } {
if { "$kind" == "buffered" } {
set buffered 1
} else {
set buffered 0
with_test_prefix $kind {
if $buffered {
set mode "r+"
} else {
set mode "r+0"
gdb_test_no_output "guile (define rw-mem-port (open-memory #:mode \"$mode\"))" \
"create r/w memory port"
gdb_test "guile (print rw-mem-port)" \
"#<input-output: gdb:memory-port 0x0-0xf+>"
gdb_test_no_output "guile (define sp-reg (parse-and-eval \"\$sp\"))" \
"get sp reg"
# Note: Only use $sp_reg for gdb_test result matching, don't use it in
# gdb commands. Otherwise transcript.N becomes unusable.
set sp_reg [get_valueof /u "\$sp" 0]
gdb_test_no_output "guile (define byte-at-sp (parse-and-eval \"*(char*) \$sp\"))" \
"save current value at sp"
# Pass the result of parse-and-eval through value-fetch-lazy!,
# otherwise the value gets left as a lazy reference to memory, which
# when re-evaluated after we flush the write will yield the newly
# written value. PR 18175
gdb_test_no_output "guile (value-fetch-lazy! byte-at-sp)" \
"un-lazyify byte-at-sp"
gdb_test "guile (print (seek rw-mem-port (value->integer sp-reg) SEEK_SET))" \
"= $sp_reg" \
"seek to \$sp"
gdb_test_no_output "guile (define old-value (value->integer byte-at-sp))" \
"define old-value"
gdb_test_no_output "guile (define new-value (logxor old-value 1))" \
"define new-value"
gdb_test "guile (print (put-bytevector rw-mem-port (make-bytevector 1 new-value)))" \
"= #<unspecified>"
if $buffered {
# Value shouldn't be in memory yet.
gdb_test "guile (print (value=? (parse-and-eval \"*(char*) \$sp\") byte-at-sp))" \
"= #t" \
"test byte at sp, before flush"
gdb_test_no_output "guile (force-output rw-mem-port)" \
"flush port"
# Value should be in memory now.
gdb_test "guile (print (value=? (parse-and-eval \"*(char*) \$sp\") byte-at-sp))" \
"= #f" \
"test byte at sp, after flush"
# Restore the value for cleanliness sake, and to verify close-port
# flushes the buffer.
gdb_test "guile (print (seek rw-mem-port (value->integer sp-reg) SEEK_SET))" \
"= $sp_reg" \
"seek to \$sp for restore"
gdb_test "guile (print (put-bytevector rw-mem-port (make-bytevector 1 old-value)))" \
"= #<unspecified>"
gdb_test "guile (print (close-port rw-mem-port))" \
"= #t"
gdb_test "guile (print (value=? (parse-and-eval \"*(char*) \$sp\") byte-at-sp))" \
"= #t" \
"test byte at sp, after close"
test_mem_port_rw buffered
test_mem_port_rw unbuffered
# Test zero-length memory ports.
gdb_test_no_output "guile (define zero-mem-port (open-memory #:start 0 #:size 0 #:mode \"r+\"))" \
"create zero length memory port"
gdb_test "guile (print (read-char zero-mem-port))" \
"= #<eof>"
gdb_test "guile (print (write-char #\\a zero-mem-port))" \
"ERROR: .*Out of range: writing beyond end of memory range.*Error while executing Scheme code."
gdb_test "guile (print (get-bytevector-n zero-mem-port 0))" \
"= #vu8\\(\\)"
gdb_test "guile (print (put-bytevector zero-mem-port (make-bytevector 0)))" \
"= #<unspecified>"
gdb_test "guile (print (close-port zero-mem-port))" "= #t"