From 0428c978376cfdee8a774521f52bfc29efb6374e Mon Sep 17 00:00:00 2001 From: Todd Fiala Date: Thu, 29 May 2014 20:44:45 +0000 Subject: [PATCH] gdb-remote testing: new test, cleaned up socket reading. Added new SocketPacketPump class to decouple gdb remote packet reading from packet expectations code. This allowed for cleaner implementation of the separate $O output streams (non-deterministic packaging of inferior stdout/stderr) from all the rest of the packets. Added a packet expectation matcher that can match expected accumulated output with a timeout. Use a dictionary with "type":"output_match". See lldbgdbserverutils.MatchRemoteOutputEntry for details. Added a gdb remote test to verify that $Hc (continue thread selection) plus signal delivery ($C{signo}) works. Having trouble getting this to pass with debugserver on MacOSX 10.9. Tried different variants, including $vCont;C{signo}:{thread-id};c. In some cases, I get the test exe's signal handler to run ($vCont variant first time), in others I don't ($vCont second and further times). $C{signo} doesn't hit the signal handler code at all in the test exe but delivers a stop. Further $Hc and $C{signo} deliver the stop marking the wrong thread. For now I'm marking the test as XFAIL on dsym/debugserver. Will revisit this on lldb-dev. Updated the text exe for these tests to support thread:print-ids (each thread announces its thread id) and provide a SIGUSR1 thread handler that prints out the thread id on which it was signaled. llvm-svn: 209845 --- lldb/test/tools/lldb-gdbserver/Makefile | 2 +- .../test/tools/lldb-gdbserver/TestLldbGdbServer.py | 125 +++++++--- .../tools/lldb-gdbserver/lldbgdbserverutils.py | 268 ++++++++++++++------- lldb/test/tools/lldb-gdbserver/main.cpp | 99 +++++++- .../tools/lldb-gdbserver/socket_packet_pump.py | 156 ++++++++++++ 5 files changed, 521 insertions(+), 129 deletions(-) create mode 100644 lldb/test/tools/lldb-gdbserver/socket_packet_pump.py diff --git a/lldb/test/tools/lldb-gdbserver/Makefile b/lldb/test/tools/lldb-gdbserver/Makefile index 35dff88..39ede97 100644 --- a/lldb/test/tools/lldb-gdbserver/Makefile +++ b/lldb/test/tools/lldb-gdbserver/Makefile @@ -1,6 +1,6 @@ LEVEL = ../../make -CFLAGS_EXTRAS := -D__STDC_LIMIT_MACROS +CFLAGS_EXTRAS := -D__STDC_LIMIT_MACROS -D__STDC_FORMAT_MACROS LD_EXTRAS := -lpthread CXX_SOURCES := main.cpp MAKE_DSYM :=NO diff --git a/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py b/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py index 3de86cd..97c8551 100644 --- a/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py +++ b/lldb/test/tools/lldb-gdbserver/TestLldbGdbServer.py @@ -4,6 +4,8 @@ Test lldb-gdbserver operation import unittest2 import pexpect +import platform +import signal import socket import subprocess import sys @@ -38,6 +40,11 @@ class LldbGdbServerTestCase(TestBase): self.test_sequence = GdbRemoteTestSequence(self.logger) self.set_inferior_startup_launch() + # Uncomment this code to force only a single test to run (by name). + # if self._testMethodName != "test_Hc_then_Csignal_signals_correct_thread_launch_debugserver_dsym": + # # print "skipping test {}".format(self._testMethodName) + # self.skipTest("focusing on one test") + def reset_test_sequence(self): self.test_sequence = GdbRemoteTestSequence(self.logger) @@ -45,11 +52,13 @@ class LldbGdbServerTestCase(TestBase): self.debug_monitor_exe = get_lldb_gdbserver_exe() if not self.debug_monitor_exe: self.skipTest("lldb_gdbserver exe not found") + self.debug_monitor_extra_args = "" def init_debugserver_test(self): self.debug_monitor_exe = get_debugserver_exe() if not self.debug_monitor_exe: self.skipTest("debugserver exe not found") + self.debug_monitor_extra_args = " --log-file=/tmp/packets-{}.log --log-flags=0x800000".format(self._testMethodName) def create_socket(self): sock = socket.socket() @@ -81,7 +90,7 @@ class LldbGdbServerTestCase(TestBase): def start_server(self, attach_pid=None): # Create the command line - commandline = "{} localhost:{}".format(self.debug_monitor_exe, self.port) + commandline = "{}{} localhost:{}".format(self.debug_monitor_exe, self.debug_monitor_extra_args, self.port) if attach_pid: commandline += " --attach=%d" % attach_pid @@ -239,7 +248,6 @@ class LldbGdbServerTestCase(TestBase): self.assertTrue("encoding" in reg_info) self.assertTrue("format" in reg_info) - def add_threadinfo_collection_packets(self): self.test_sequence.add_log_lines( [ { "type":"multi_response", "first_query":"qfThreadInfo", "next_query":"qsThreadInfo", @@ -247,7 +255,6 @@ class LldbGdbServerTestCase(TestBase): "save_key":"threadinfo_responses" } ], True) - def parse_threadinfo_packets(self, context): """Return an array of thread ids (decimal ints), one per thread.""" threadinfo_responses = context.get("threadinfo_responses") @@ -259,7 +266,6 @@ class LldbGdbServerTestCase(TestBase): thread_ids.extend(new_thread_infos) return thread_ids - def wait_for_thread_count(self, thread_count, timeout_seconds=3): start_time = time.time() timeout_time = start_time + timeout_seconds @@ -284,7 +290,6 @@ class LldbGdbServerTestCase(TestBase): return threads - def run_process_then_stop(self, run_seconds=1): # Tell the stub to continue. self.test_sequence.add_log_lines( @@ -304,7 +309,8 @@ class LldbGdbServerTestCase(TestBase): context = self.expect_gdbremote_sequence() self.assertIsNotNone(context) self.assertIsNotNone(context.get("stop_result")) - + + return context @debugserver_test def test_exe_starts_debugserver(self): @@ -806,7 +812,6 @@ class LldbGdbServerTestCase(TestBase): # Ensure we have a flags register. self.assertTrue('flags' in generic_regs) - @debugserver_test @dsym_test def test_qRegisterInfo_contains_required_generics_debugserver_dsym(self): @@ -822,7 +827,6 @@ class LldbGdbServerTestCase(TestBase): self.buildDwarf() self.qRegisterInfo_contains_required_generics() - def qRegisterInfo_contains_at_least_one_register_set(self): server = self.start_server() self.assertIsNotNone(server) @@ -846,7 +850,6 @@ class LldbGdbServerTestCase(TestBase): register_sets = { reg_info['set']:1 for reg_info in reg_infos if 'set' in reg_info } self.assertTrue(len(register_sets) >= 1) - @debugserver_test @dsym_test def test_qRegisterInfo_contains_at_least_one_register_set_debugserver_dsym(self): @@ -854,7 +857,6 @@ class LldbGdbServerTestCase(TestBase): self.buildDsym() self.qRegisterInfo_contains_at_least_one_register_set() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -863,7 +865,6 @@ class LldbGdbServerTestCase(TestBase): self.buildDwarf() self.qRegisterInfo_contains_at_least_one_register_set() - def qThreadInfo_contains_thread(self): procs = self.prep_debug_monitor_and_inferior() self.add_threadinfo_collection_packets() @@ -879,7 +880,6 @@ class LldbGdbServerTestCase(TestBase): # We should have exactly one thread. self.assertEqual(len(threads), 1) - @debugserver_test @dsym_test def test_qThreadInfo_contains_thread_launch_debugserver_dsym(self): @@ -888,7 +888,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.qThreadInfo_contains_thread() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -898,7 +897,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.qThreadInfo_contains_thread() - @debugserver_test @dsym_test def test_qThreadInfo_contains_thread_attach_debugserver_dsym(self): @@ -907,7 +905,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.qThreadInfo_contains_thread() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -917,7 +914,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.qThreadInfo_contains_thread() - def qThreadInfo_matches_qC(self): procs = self.prep_debug_monitor_and_inferior() @@ -946,7 +942,6 @@ class LldbGdbServerTestCase(TestBase): # Those two should be the same. self.assertEquals(threads[0], QC_thread_id) - @debugserver_test @dsym_test def test_qThreadInfo_matches_qC_launch_debugserver_dsym(self): @@ -955,7 +950,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.qThreadInfo_matches_qC() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -965,7 +959,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.qThreadInfo_matches_qC() - @debugserver_test @dsym_test def test_qThreadInfo_matches_qC_attach_debugserver_dsym(self): @@ -974,7 +967,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.qThreadInfo_matches_qC() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -984,7 +976,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.qThreadInfo_matches_qC() - def p_returns_correct_data_size_for_each_qRegisterInfo(self): procs = self.prep_debug_monitor_and_inferior() self.add_register_info_collection_packets() @@ -1021,7 +1012,6 @@ class LldbGdbServerTestCase(TestBase): # Increment loop reg_index += 1 - @debugserver_test @dsym_test def test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_debugserver_dsym(self): @@ -1030,7 +1020,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.p_returns_correct_data_size_for_each_qRegisterInfo() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -1040,7 +1029,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.p_returns_correct_data_size_for_each_qRegisterInfo() - @debugserver_test @dsym_test def test_p_returns_correct_data_size_for_each_qRegisterInfo_attach_debugserver_dsym(self): @@ -1049,7 +1037,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.p_returns_correct_data_size_for_each_qRegisterInfo() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -1059,7 +1046,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.p_returns_correct_data_size_for_each_qRegisterInfo() - def Hg_switches_to_3_threads(self): # Startup the inferior with three threads (main + 2 new ones). procs = self.prep_debug_monitor_and_inferior(inferior_args=["thread:new", "thread:new"]) @@ -1076,7 +1062,7 @@ class LldbGdbServerTestCase(TestBase): # Change to each thread, verify current thread id. self.reset_test_sequence() self.test_sequence.add_log_lines( - ["read packet: $Hg{}#00".format(hex(thread)), # Set current thread. + ["read packet: $Hg{0:x}#00".format(thread), # Set current thread. "send packet: $OK#00", "read packet: $qC#00", { "direction":"send", "regex":r"^\$QC([0-9a-fA-F]+)#", "capture":{1:"thread_id"} }], @@ -1097,7 +1083,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.Hg_switches_to_3_threads() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -1107,7 +1092,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_launch() self.Hg_switches_to_3_threads() - @debugserver_test @dsym_test def test_Hg_switches_to_3_threads_attach_debugserver_dsym(self): @@ -1116,7 +1100,6 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.Hg_switches_to_3_threads() - @llgs_test @dwarf_test @unittest2.expectedFailure() @@ -1126,5 +1109,87 @@ class LldbGdbServerTestCase(TestBase): self.set_inferior_startup_attach() self.Hg_switches_to_3_threads() + def Hc_then_Csignal_signals_correct_thread(self): + # NOTE only run this one in inferior-launched mode: we can't grab inferior stdout when running attached, + # and the test requires getting stdout from the exe. + + NUM_THREADS = 3 + + # Startup the inferior with three threads (main + NUM_THREADS-1 worker threads). + inferior_args=["thread:print-ids"] + for i in range(NUM_THREADS - 1): + inferior_args.append("thread:new") + inferior_args.append("sleep:20") + + procs = self.prep_debug_monitor_and_inferior(inferior_args=inferior_args) + + # Let the inferior process have a few moments to start up the thread when launched. + context = self.run_process_then_stop(run_seconds=1) + + # Wait at most x seconds for all threads to be present. + threads = self.wait_for_thread_count(NUM_THREADS, timeout_seconds=5) + self.assertEquals(len(threads), NUM_THREADS) + + # print_thread_ids = {} + + # Switch to each thread, deliver a signal, and verify signal delivery + for thread_id in threads: + # Change to each thread, verify current thread id. + self.reset_test_sequence() + self.test_sequence.add_log_lines( + ["read packet: $Hc{0:x}#00".format(thread_id), # Set current thread. + "send packet: $OK#00", + "read packet: $C{0:x}#00".format(signal.SIGUSR1), + {"direction":"send", "regex":r"^\$T([0-9a-fA-F]{2})thread:([0-9a-fA-F]+);", "capture":{1:"stop_signo", 2:"stop_thread_id"} }, + # "read packet: $vCont;C{0:x}:{1:x};c#00".format(signal.SIGUSR1, thread_id), + # "read packet: $vCont;C{0:x};c#00".format(signal.SIGUSR1, thread_id), + # { "type":"output_match", "regex":r"^received SIGUSR1 on thread id: ([0-9a-fA-F]+)\r\n$", "capture":{ 1:"print_thread_id"} }, + "read packet: $c#00", + "read packet: {}".format(chr(03)), + {"direction":"send", "regex":r"^\$T([0-9a-fA-F]{2})thread:([0-9a-fA-F]+);", "capture":{1:"intr_signo", 2:"intr_thread_id"} } + ], + True) + + # Run the sequence. + context = self.expect_gdbremote_sequence() + self.assertIsNotNone(context) + + # Ensure the stop signal is the signal we delivered. + stop_signo = context.get("stop_signo") + self.assertIsNotNone(stop_signo) + self.assertEquals(int(stop_signo,16), signal.SIGUSR1) + + # Ensure the stop thread is the thread to which we delivered the signal. + stop_thread_id = context.get("stop_thread_id") + self.assertIsNotNone(stop_thread_id) + self.assertEquals(int(stop_thread_id,16), thread_id) + + # Ensure we haven't seen this thread id yet. The inferior's self-obtained thread ids are not guaranteed to match the stub tids (at least on MacOSX). + # print_thread_id = context.get("print_thread_id") + # self.assertIsNotNone(print_thread_id) + # self.assertFalse(print_thread_id in print_thread_ids) + + # Now remember this print (i.e. inferior-reflected) thread id and ensure we don't hit it again. + # print_thread_ids[print_thread_id] = 1 + + @debugserver_test + @dsym_test + @unittest2.expectedFailure() # this test is failing on MacOSX 10.9 + def test_Hc_then_Csignal_signals_correct_thread_launch_debugserver_dsym(self): + self.init_debugserver_test() + self.buildDsym() + self.set_inferior_startup_launch() + self.Hc_then_Csignal_signals_correct_thread() + + @llgs_test + @dwarf_test + @unittest2.expectedFailure() + def test_Hc_then_Csignal_signals_correct_thread_launch_llgs_dwarf(self): + self.init_llgs_test() + self.buildDwarf() + self.set_inferior_startup_launch() + self.Hc_then_Csignal_signals_correct_thread() + + if __name__ == '__main__': unittest2.main() diff --git a/lldb/test/tools/lldb-gdbserver/lldbgdbserverutils.py b/lldb/test/tools/lldb-gdbserver/lldbgdbserverutils.py index ae866e8..fe14adf 100644 --- a/lldb/test/tools/lldb-gdbserver/lldbgdbserverutils.py +++ b/lldb/test/tools/lldb-gdbserver/lldbgdbserverutils.py @@ -4,12 +4,13 @@ import os import os.path import platform +import Queue import re import select +import socket_packet_pump import subprocess import time - def _get_debug_monitor_from_lldb(lldb_exe, debug_monitor_basename): """Return the debug monitor exe path given the lldb exe path. @@ -108,7 +109,7 @@ def _is_packet_lldb_gdbserver_input(packet_type, llgs_input_is_read): raise "Unknown packet type: {}".format(packet_type) -def handle_O_packet(context, packet_contents): +def handle_O_packet(context, packet_contents, logger): """Handle O packets.""" if (not packet_contents) or (len(packet_contents) < 1): return False @@ -117,8 +118,13 @@ def handle_O_packet(context, packet_contents): elif packet_contents == "OK": return False - context["O_content"] += gdbremote_hex_decode_string(packet_contents[1:]) + new_text = gdbremote_hex_decode_string(packet_contents[1:]) + context["O_content"] += new_text context["O_count"] += 1 + + if logger: + logger.debug("text: new \"{}\", cumulative: \"{}\"".format(new_text, context["O_content"])) + return True _STRIP_CHECKSUM_REGEX = re.compile(r'#[0-9a-fA-F]{2}$') @@ -134,9 +140,6 @@ def assert_packets_equal(asserter, actual_packet, expected_packet): expected_stripped = _STRIP_CHECKSUM_REGEX.sub('', expected_packet) asserter.assertEqual(actual_stripped, expected_stripped) - -_GDB_REMOTE_PACKET_REGEX = re.compile(r'^\$([^\#]*)#[0-9a-fA-F]{2}') - def expect_lldb_gdbserver_replay( asserter, sock, @@ -178,84 +181,64 @@ def expect_lldb_gdbserver_replay( # Ensure we have some work to do. if len(test_sequence.entries) < 1: return {} - - received_lines = [] - receive_buffer = '' + context = {"O_count":0, "O_content":""} + with socket_packet_pump.SocketPacketPump(sock, logger) as pump: + # Grab the first sequence entry. + sequence_entry = test_sequence.entries.pop(0) + + # While we have an active sequence entry, send messages + # destined for the stub and collect/match/process responses + # expected from the stub. + while sequence_entry: + if sequence_entry.is_send_to_remote(): + # This is an entry to send to the remote debug monitor. + send_packet = sequence_entry.get_send_packet() + if logger: + logger.info("sending packet to remote: %s" % send_packet) + sock.sendall(send_packet) + else: + # This is an entry expecting to receive content from the remote debug monitor. - sequence_entry = test_sequence.entries.pop(0) - while sequence_entry: - if sequence_entry.is_send_to_remote(): - # This is an entry to send to the remote debug monitor. - send_packet = sequence_entry.get_send_packet() - if logger: - logger.info("sending packet to remote: %s" % send_packet) - sock.sendall(send_packet) - else: - # This is an entry to expect to receive from the remote debug monitor. - if logger: - logger.info("receiving packet from remote") - - start_time = time.time() - timeout_time = start_time + timeout_seconds - - # while we don't have a complete line of input, wait - # for it from socket. - while len(received_lines) < 1: - # check for timeout - if time.time() > timeout_time: - raise Exception( - 'timed out after {} seconds while waiting for llgs to respond, currently received: {}'.format( - timeout_seconds, receive_buffer)) - can_read, _, _ = select.select([sock], [], [], 0) - if can_read and sock in can_read: + # We'll pull from (and wait on) the queue appropriate for the type of matcher. + # We keep separate queues for process output (coming from non-deterministic + # $O packet division) and for all other packets. + if sequence_entry.is_output_matcher(): + try: + # Grab next entry from the output queue. + content = pump.output_queue().get(True, timeout_seconds) + except Queue.Empty: + if logger: + logger.warning("timeout waiting for stub output (accumulated output:{})".format(pump.get_accumulated_output())) + raise Exception("timed out while waiting for output match (accumulated output: {})".format(pump.get_accumulated_output())) + else: try: - new_bytes = sock.recv(4096) - except: - new_bytes = None - if new_bytes and len(new_bytes) > 0: - # read the next bits from the socket + content = pump.packet_queue().get(True, timeout_seconds) + except Queue.Empty: if logger: - logger.debug("llgs responded with bytes: {}".format(new_bytes)) - receive_buffer += new_bytes - - # parse fully-formed packets into individual packets - has_more = len(receive_buffer) > 0 - while has_more: - if len(receive_buffer) <= 0: - has_more = False - # handle '+' ack - elif receive_buffer[0] == '+': - received_lines.append('+') - receive_buffer = receive_buffer[1:] - if logger: - logger.debug('parsed packet from llgs: +, new receive_buffer: {}'.format(receive_buffer)) - else: - packet_match = _GDB_REMOTE_PACKET_REGEX.match(receive_buffer) - if packet_match: - if not handle_O_packet(context, packet_match.group(1)): - # Normal packet to match. - received_lines.append(packet_match.group(0)) - receive_buffer = receive_buffer[len(packet_match.group(0)):] - if logger: - logger.debug('parsed packet from llgs: {}, new receive_buffer: {}'.format(packet_match.group(0), receive_buffer)) - else: - has_more = False - # got a line - now try to match it against expected line - if len(received_lines) > 0: - received_packet = received_lines.pop(0) - context = sequence_entry.assert_match(asserter, received_packet, context=context) + logger.warning("timeout waiting for packet match (receive buffer: {})".format(pump.get_receive_buffer())) + raise Exception("timed out while waiting for packet match (receive buffer: {})".format(pump.get_receive_buffer())) - # Move on to next sequence entry as needed. Some sequence entries support executing multiple - # times in different states (for looping over query/response packets). - if sequence_entry.is_consumed(): - if len(test_sequence.entries) > 0: - sequence_entry = test_sequence.entries.pop(0) - else: - sequence_entry = None + # Give the sequence entry the opportunity to match the content. + # Output matchers might match or pass after more output accumulates. + # Other packet types generally must match. + asserter.assertIsNotNone(content) + context = sequence_entry.assert_match(asserter, content, context=context) + + # Move on to next sequence entry as needed. Some sequence entries support executing multiple + # times in different states (for looping over query/response packets). + if sequence_entry.is_consumed(): + if len(test_sequence.entries) > 0: + sequence_entry = test_sequence.entries.pop(0) + else: + sequence_entry = None + + # Fill in the O_content entries. + context["O_count"] = 1 + context["O_content"] = pump.get_accumulated_output() + return context - def gdbremote_hex_encode_string(str): output = '' for c in str: @@ -271,7 +254,6 @@ def gdbremote_packet_encode_string(str): checksum += ord(c) return '$' + str + '#{0:02x}'.format(checksum % 256) - def build_gdbremote_A_packet(args_list): """Given a list of args, create a properly-formed $A packet containing each arg. """ @@ -327,8 +309,11 @@ def parse_threadinfo_response(response_packet): # Return list of thread ids return [int(thread_id_hex,16) for thread_id_hex in response_packet.split(",") if len(thread_id_hex) > 0] +class GdbRemoteEntryBase(object): + def is_output_matcher(self): + return False -class GdbRemoteEntry(object): +class GdbRemoteEntry(GdbRemoteEntryBase): def __init__(self, is_send_to_remote=True, exact_payload=None, regex=None, capture=None, expect_captures=None): """Create an entry representing one piece of the I/O to/from a gdb remote debug monitor. @@ -446,7 +431,7 @@ class GdbRemoteEntry(object): else: raise Exception("Don't know how to match a remote-sent packet when exact_payload isn't specified.") -class MultiResponseGdbRemoteEntry(object): +class MultiResponseGdbRemoteEntry(GdbRemoteEntryBase): """Represents a query/response style packet. Assumes the first item is sent to the gdb remote. @@ -557,6 +542,99 @@ class MultiResponseGdbRemoteEntry(object): self._is_send_to_remote = True return context +class MatchRemoteOutputEntry(GdbRemoteEntryBase): + """Waits for output from the debug monitor to match a regex or time out. + + This entry type tries to match each time new gdb remote output is accumulated + using a provided regex. If the output does not match the regex within the + given timeframe, the command fails the playback session. If the regex does + match, any capture fields are recorded in the context. + + Settings accepted from params: + + regex: required. Specifies a compiled regex object that must either succeed + with re.match or re.search (see regex_mode below) within the given timeout + (see timeout_seconds below) or cause the playback to fail. + + regex_mode: optional. Available values: "match" or "search". If "match", the entire + stub output as collected so far must match the regex. If search, then the regex + must match starting somewhere within the output text accumulated thus far. + Default: "match" (i.e. the regex must match the entirety of the accumulated output + buffer, so unexpected text will generally fail the match). + + capture: optional. If specified, is a dictionary of regex match group indices (should start + with 1) to variable names that will store the capture group indicated by the + index. For example, {1:"thread_id"} will store capture group 1's content in the + context dictionary where "thread_id" is the key and the match group value is + the value. The value stored off can be used later in a expect_captures expression. + This arg only makes sense when regex is specified. + """ + def __init__(self, regex=None, regex_mode="match", capture=None): + self._regex = regex + self._regex_mode = regex_mode + self._capture = capture + self._matched = False + + if not self._regex: + raise Exception("regex cannot be None") + + if not self._regex_mode in ["match", "search"]: + raise Exception("unsupported regex mode \"{}\": must be \"match\" or \"search\"".format(self._regex_mode)) + + def is_output_matcher(self): + return True + + def is_send_to_remote(self): + # This is always a "wait for remote" command. + return False + + def is_consumed(self): + return self._matched + + def assert_match(self, asserter, accumulated_output, context): + # Validate args. + if not accumulated_output: + raise Exception("accumulated_output cannot be none") + if not context: + raise Exception("context cannot be none") + + # Validate that we haven't already matched. + if self._matched: + raise Exception("invalid state - already matched, attempting to match again") + + # If we don't have any content yet, we don't match. + if len(accumulated_output) < 1: + return context + + # Check if we match + if self._regex_mode == "match": + match = self._regex.match(accumulated_output) + elif self._regex_mode == "search": + match = self._regex.search(accumulated_output) + else: + raise Exception("Unexpected regex mode: {}".format(self._regex_mode)) + + # If we don't match, wait to try again after next $O content, or time out. + if not match: + # print "re pattern \"{}\" did not match against \"{}\"".format(self._regex.pattern, accumulated_output) + return context + + # We do match. + self._matched = True + # print "re pattern \"{}\" matched against \"{}\"".format(self._regex.pattern, accumulated_output) + + # Collect up any captures into the context. + if self._capture: + # Handle captures. + for group_index, var_name in self._capture.items(): + capture_text = match.group(group_index) + if not capture_text: + raise Exception("No content for group index {}".format(group_index)) + context[var_name] = capture_text + + return context + + class GdbRemoteTestSequence(object): _LOG_LINE_REGEX = re.compile(r'^.*(read|send)\s+packet:\s+(.+)$') @@ -569,21 +647,21 @@ class GdbRemoteTestSequence(object): for line in log_lines: if type(line) == str: # Handle log line import - if self.logger: - self.logger.debug("processing log line: {}".format(line)) + # if self.logger: + # self.logger.debug("processing log line: {}".format(line)) match = self._LOG_LINE_REGEX.match(line) if match: playback_packet = match.group(2) direction = match.group(1) if _is_packet_lldb_gdbserver_input(direction, remote_input_is_read): # Handle as something to send to the remote debug monitor. - if self.logger: - self.logger.info("processed packet to send to remote: {}".format(playback_packet)) + # if self.logger: + # self.logger.info("processed packet to send to remote: {}".format(playback_packet)) self.entries.append(GdbRemoteEntry(is_send_to_remote=True, exact_payload=playback_packet)) else: # Log line represents content to be expected from the remote debug monitor. - if self.logger: - self.logger.info("receiving packet from llgs, should match: {}".format(playback_packet)) + # if self.logger: + # self.logger.info("receiving packet from llgs, should match: {}".format(playback_packet)) self.entries.append(GdbRemoteEntry(is_send_to_remote=False,exact_payload=playback_packet)) else: raise Exception("failed to interpret log line: {}".format(line)) @@ -602,16 +680,26 @@ class GdbRemoteTestSequence(object): if _is_packet_lldb_gdbserver_input(direction, remote_input_is_read): # Handle as something to send to the remote debug monitor. - if self.logger: - self.logger.info("processed dict sequence to send to remote") + # if self.logger: + # self.logger.info("processed dict sequence to send to remote") self.entries.append(GdbRemoteEntry(is_send_to_remote=True, regex=regex, capture=capture, expect_captures=expect_captures)) else: # Log line represents content to be expected from the remote debug monitor. - if self.logger: - self.logger.info("processed dict sequence to match receiving from remote") + # if self.logger: + # self.logger.info("processed dict sequence to match receiving from remote") self.entries.append(GdbRemoteEntry(is_send_to_remote=False, regex=regex, capture=capture, expect_captures=expect_captures)) elif entry_type == "multi_response": self.entries.append(MultiResponseGdbRemoteEntry(line)) + elif entry_type == "output_match": + + regex = line.get("regex", None) + # Compile the regex. + if regex and (type(regex) == str): + regex = re.compile(regex) + + regex_mode = line.get("regex_mode", "match") + capture = line.get("capture", None) + self.entries.append(MatchRemoteOutputEntry(regex=regex, regex_mode=regex_mode, capture=capture)) else: raise Exception("unknown entry type \"%s\"" % entry_type) diff --git a/lldb/test/tools/lldb-gdbserver/main.cpp b/lldb/test/tools/lldb-gdbserver/main.cpp index be7e863..f32e4285 100644 --- a/lldb/test/tools/lldb-gdbserver/main.cpp +++ b/lldb/test/tools/lldb-gdbserver/main.cpp @@ -1,24 +1,88 @@ #include #include -#include +#include +#include #include +#include +#include +#include #include #include +#if defined(__linux__) +#include +#endif + static const char *const RETVAL_PREFIX = "retval:"; static const char *const SLEEP_PREFIX = "sleep:"; static const char *const STDERR_PREFIX = "stderr:"; static const char *const THREAD_PREFIX = "thread:"; static const char *const THREAD_COMMAND_NEW = "new"; +static const char *const THREAD_COMMAND_PRINT_IDS = "print-ids"; + +static bool g_print_thread_ids = false; +static pthread_mutex_t g_print_mutex = PTHREAD_MUTEX_INITIALIZER; + +static void +print_thread_id () +{ + // Put in the right magic here for your platform to spit out the thread id (tid) that debugserver/lldb-gdbserver would see as a TID. + // Otherwise, let the else clause print out the unsupported text so that the unit test knows to skip verifying thread ids. +#if defined(__APPLE__) + printf ("%" PRIx64, static_cast (pthread_mach_thread_np(pthread_self()))); +#elif defined (__linux__) + // This is a call to gettid() via syscall. + printf ("%" PRIx64, static_cast (syscall (__NR_gettid))); +#else + printf("{no-tid-support}"); +#endif +} + +static void +signal_handler (int signo) +{ + switch (signo) + { + case SIGUSR1: + // Print notice that we received the signal on a given thread. + pthread_mutex_lock (&g_print_mutex); + printf ("received SIGUSR1 on thread id: "); + print_thread_id (); + printf ("\n"); + pthread_mutex_unlock (&g_print_mutex); + + // Reset the signal handler. + sig_t sig_result = signal (SIGUSR1, signal_handler); + if (sig_result == SIG_ERR) + { + fprintf(stderr, "failed to set signal handler: errno=%d\n", errno); + exit (1); + } + + break; + } +} static void* thread_func (void *arg) { + static int s_thread_index = 1; // For now, just sleep for a few seconds. // std::cout << "thread " << pthread_self() << ": created" << std::endl; - int sleep_seconds_remaining = 5; + const int this_thread_index = s_thread_index++; + + if (g_print_thread_ids) + { + pthread_mutex_lock (&g_print_mutex); + printf ("thread %d id: ", this_thread_index); + print_thread_id (); + printf ("\n"); + pthread_mutex_unlock (&g_print_mutex); + } + + int sleep_seconds_remaining = 20; while (sleep_seconds_remaining > 0) { sleep_seconds_remaining = sleep (sleep_seconds_remaining); @@ -33,12 +97,21 @@ int main (int argc, char **argv) std::vector threads; int return_value = 0; + // Set the signal handler. + sig_t sig_result = signal (SIGUSR1, signal_handler); + if (sig_result == SIG_ERR) + { + fprintf(stderr, "failed to set signal handler: errno=%d\n", errno); + exit (1); + } + + // Process command line args. for (int i = 1; i < argc; ++i) { if (std::strstr (argv[i], STDERR_PREFIX)) { // Treat remainder as text to go to stderr. - std::cerr << (argv[i] + strlen (STDERR_PREFIX)) << std::endl; + fprintf (stderr, "%s\n", (argv[i] + strlen (STDERR_PREFIX))); } else if (std::strstr (argv[i], RETVAL_PREFIX)) { @@ -68,11 +141,23 @@ int main (int argc, char **argv) const int err = ::pthread_create (&new_thread, NULL, thread_func, NULL); if (err) { - std::cerr << "pthread_create() failed with error code " << err << std::endl; + fprintf (stderr, "pthread_create() failed with error code %d\n", err); exit (err); } threads.push_back (new_thread); } + else if (std::strstr (argv[i] + strlen(THREAD_PREFIX), THREAD_COMMAND_PRINT_IDS)) + { + // Turn on thread id announcing. + g_print_thread_ids = true; + + // And announce us. + pthread_mutex_lock (&g_print_mutex); + printf ("thread 0 id: "); + print_thread_id (); + printf ("\n"); + pthread_mutex_unlock (&g_print_mutex); + } else { // At this point we don't do anything else with threads. @@ -82,7 +167,7 @@ int main (int argc, char **argv) else { // Treat the argument as text for stdout. - std::cout << argv[i] << std::endl; + printf("%s\n", argv[i]); } } @@ -92,9 +177,7 @@ int main (int argc, char **argv) void *thread_retval = NULL; const int err = ::pthread_join (*it, &thread_retval); if (err != 0) - { - std::cerr << "pthread_join() failed with error code " << err << std::endl; - } + fprintf (stderr, "pthread_join() failed with error code %d\n", err); } return return_value; diff --git a/lldb/test/tools/lldb-gdbserver/socket_packet_pump.py b/lldb/test/tools/lldb-gdbserver/socket_packet_pump.py new file mode 100644 index 0000000..2ec2419 --- /dev/null +++ b/lldb/test/tools/lldb-gdbserver/socket_packet_pump.py @@ -0,0 +1,156 @@ +import Queue +import re +import select +import threading + +def _handle_output_packet_string(packet_contents): + if (not packet_contents) or (len(packet_contents) < 1): + return None + elif packet_contents[0] != "O": + return None + elif packet_contents == "OK": + return None + else: + return packet_contents[1:].decode("hex") + +class SocketPacketPump(object): + """A threaded packet reader that partitions packets into two streams. + + All incoming $O packet content is accumulated with the current accumulation + state put into the OutputQueue. + + All other incoming packets are placed in the packet queue. + + A select thread can be started and stopped, and runs to place packet + content into the two queues. + """ + + _GDB_REMOTE_PACKET_REGEX = re.compile(r'^\$([^\#]*)#[0-9a-fA-F]{2}') + + def __init__(self, pump_socket, logger=None): + if not pump_socket: + raise Exception("pump_socket cannot be None") + + self._output_queue = Queue.Queue() + self._packet_queue = Queue.Queue() + self._thread = None + self._stop_thread = False + self._socket = pump_socket + self._logger = logger + self._receive_buffer = "" + self._accumulated_output = "" + + def __enter__(self): + """Support the python 'with' statement. + + Start the pump thread.""" + self.start_pump_thread() + return self + + def __exit__(self, exit_type, value, traceback): + """Support the python 'with' statement. + + Shut down the pump thread.""" + self.stop_pump_thread() + + def start_pump_thread(self): + if self._thread: + raise Exception("pump thread is already running") + self._stop_thread = False + self._thread = threading.Thread(target=self._run_method) + self._thread.start() + + def stop_pump_thread(self): + self._stop_thread = True + if self._thread: + self._thread.join() + + def output_queue(self): + return self._output_queue + + def packet_queue(self): + return self._packet_queue + + def _process_new_bytes(self, new_bytes): + if not new_bytes: + return + if len(new_bytes) < 1: + return + + # Add new bytes to our accumulated unprocessed packet bytes. + self._receive_buffer += new_bytes + + # Parse fully-formed packets into individual packets. + has_more = len(self._receive_buffer) > 0 + while has_more: + if len(self._receive_buffer) <= 0: + has_more = False + # handle '+' ack + elif self._receive_buffer[0] == "+": + self._packet_queue.put("+") + self._receive_buffer = self._receive_buffer[1:] + if self._logger: + self._logger.debug( + "parsed packet from stub: +\n" + + "new receive_buffer: {}".format( + self._receive_buffer)) + else: + packet_match = self._GDB_REMOTE_PACKET_REGEX.match( + self._receive_buffer) + if packet_match: + # Our receive buffer matches a packet at the + # start of the receive buffer. + new_output_content = _handle_output_packet_string( + packet_match.group(1)) + if new_output_content: + # This was an $O packet with new content. + self._accumulated_output += new_output_content + self._output_queue.put(self._accumulated_output) + else: + # Any packet other than $O. + self._packet_queue.put(packet_match.group(0)) + + # Remove the parsed packet from the receive + # buffer. + self._receive_buffer = self._receive_buffer[ + len(packet_match.group(0)):] + if self._logger: + self._logger.debug("parsed packet from stub: " + + packet_match.group(0)) + self._logger.debug("new receive_buffer: " + + self._receive_buffer) + else: + # We don't have enough in the receive bufferto make a full + # packet. Stop trying until we read more. + has_more = False + + def _run_method(self): + self._receive_buffer = "" + self._accumulated_output = "" + + if self._logger: + self._logger.info("socket pump starting") + + # Keep looping around until we're asked to stop the thread. + while not self._stop_thread: + can_read, _, _ = select.select([self._socket], [], [], 0) + if can_read and self._socket in can_read: + try: + new_bytes = self._socket.recv(4096) + if self._logger and new_bytes and len(new_bytes) > 0: + self._logger.debug("pump received bytes: {}".format(new_bytes)) + except: + # Likely a closed socket. Done with the pump thread. + if self._logger: + self._logger.debug("socket read failed, stopping pump read thread") + break + self._process_new_bytes(new_bytes) + + if self._logger: + self._logger.info("socket pump exiting") + + def get_accumulated_output(self): + return self._accumulated_output + + def get_receive_buffer(self): + return self._receive_buffer \ No newline at end of file -- 2.7.4