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gdbstub: add test for untimely stop-reply packets

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In the previous commit, we modified gdbstub.c to only send stop-reply
packets as a response to GDB commands that accept it. Now, let's add a
test for this intended behavior. Running this test before the fix from
the previous commit fails as QEMU sends a stop-reply packet
asynchronously, when GDB was in fact waiting an ACK.

Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <a30d93b9a8d66e9d9294354cfa2fc3af35f00202.1683214375.git.quic_mathbern@quicinc.com>
This commit is contained in:
Matheus Tavares Bernardino 2023-05-04 12:37:32 -03:00 committed by Taylor Simpson
parent 758370052f
commit dae66a3f66
2 changed files with 27 additions and 5 deletions
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16
tests/guest-debug/run-test.py
View File

@ -26,11 +26,12 @@ def get_args():
parser.add_argument("--qargs", help="Qemu arguments for test")
parser.add_argument("--binary", help="Binary to debug",
required=True)
parser.add_argument("--test", help="GDB test script",
required=True)
parser.add_argument("--test", help="GDB test script")
parser.add_argument("--gdb", help="The gdb binary to use",
default=None)
parser.add_argument("--gdb-args", help="Additional gdb arguments")
parser.add_argument("--output", help="A file to redirect output to")
parser.add_argument("--stderr", help="A file to redirect stderr to")
return parser.parse_args()
@ -58,6 +59,10 @@ if __name__ == '__main__':
output = open(args.output, "w")
else:
output = None
if args.stderr:
stderr = open(args.stderr, "w")
else:
stderr = None
socket_dir = TemporaryDirectory("qemu-gdbstub")
socket_name = os.path.join(socket_dir.name, "gdbstub.socket")
@ -77,6 +82,8 @@ if __name__ == '__main__':
# Now launch gdb with our test and collect the result
gdb_cmd = "%s %s" % (args.gdb, args.binary)
if args.gdb_args:
gdb_cmd += " %s" % (args.gdb_args)
# run quietly and ignore .gdbinit
gdb_cmd += " -q -n -batch"
# disable prompts in case of crash
@ -84,13 +91,14 @@ if __name__ == '__main__':
# connect to remote
gdb_cmd += " -ex 'target remote %s'" % (socket_name)
# finally the test script itself
gdb_cmd += " -x %s" % (args.test)
if args.test:
gdb_cmd += " -x %s" % (args.test)
sleep(1)
log(output, "GDB CMD: %s" % (gdb_cmd))
result = subprocess.call(gdb_cmd, shell=True, stdout=output)
result = subprocess.call(gdb_cmd, shell=True, stdout=output, stderr=stderr)
# A result of greater than 128 indicates a fatal signal (likely a
# crash due to gdb internal failure). That's a problem for GDB and

16
tests/tcg/multiarch/system/Makefile.softmmu-target
View File

@ -27,6 +27,20 @@ run-gdbstub-memory: memory
"-monitor none -display none -chardev file$(COMMA)path=$<.out$(COMMA)id=output $(QEMU_OPTS)" \
--bin $< --test $(MULTIARCH_SRC)/gdbstub/memory.py, \
softmmu gdbstub support)
run-gdbstub-untimely-packet: hello
$(call run-test, $@, $(GDB_SCRIPT) \
--gdb $(HAVE_GDB_BIN) \
--gdb-args "-ex 'set debug remote 1'" \
--output untimely-packet.gdb.out \
--stderr untimely-packet.gdb.err \
--qemu $(QEMU) \
--bin $< --qargs \
"-monitor none -display none -chardev file$(COMMA)path=untimely-packet.out$(COMMA)id=output $(QEMU_OPTS)", \
"softmmu gdbstub untimely packets")
$(call quiet-command, \
(! grep -Fq 'Packet instead of Ack, ignoring it' untimely-packet.gdb.err), \
"GREP", "file untimely-packet.gdb.err")
else
run-gdbstub-%:
$(call skip-test, "gdbstub test $*", "no guest arch support")
@ -36,4 +50,4 @@ run-gdbstub-%:
$(call skip-test, "gdbstub test $*", "need working gdb")
endif
MULTIARCH_RUNS += run-gdbstub-memory
MULTIARCH_RUNS += run-gdbstub-memory run-gdbstub-untimely-packet