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from __future__ import print_function
import gdbremote_testcase
from lldbsuite.test.lldbtest import *
class TestGdbRemoteAuxvSupport(gdbremote_testcase.GdbRemoteTestCaseBase):
mydir = TestBase.compute_mydir(__file__)
AUXV_SUPPORT_FEATURE_NAME = "qXfer:auxv:read"
def has_auxv_support(self):
inferior_args = ["message:main entered", "sleep:5"]
procs = self.prep_debug_monitor_and_inferior(inferior_args=inferior_args)
# Don't do anything until we match the launched inferior main entry output.
# Then immediately interrupt the process.
# This prevents auxv data being asked for before it's ready and leaves
# us in a stopped state.
self.test_sequence.add_log_lines([
# Start the inferior...
"read packet: $c#63",
# ... match output....
{ "type":"output_match", "regex":r"^message:main entered\r\n$" },
], True)
# ... then interrupt.
self.add_interrupt_packets()
self.add_qSupported_packets()
context = self.expect_gdbremote_sequence()
self.assertIsNotNone(context)
features = self.parse_qSupported_response(context)
return self.AUXV_SUPPORT_FEATURE_NAME in features and features[self.AUXV_SUPPORT_FEATURE_NAME] == "+"
def get_raw_auxv_data(self):
# Start up llgs and inferior, and check for auxv support.
if not self.has_auxv_support():
self.skipTest("auxv data not supported")
# Grab pointer size for target. We'll assume that is equivalent to an unsigned long on the target.
# Auxv is specified in terms of pairs of unsigned longs.
self.reset_test_sequence()
self.add_process_info_collection_packets()
context = self.expect_gdbremote_sequence()
self.assertIsNotNone(context)
proc_info = self.parse_process_info_response(context)
self.assertIsNotNone(proc_info)
self.assertTrue("ptrsize" in proc_info)
word_size = int(proc_info["ptrsize"])
OFFSET = 0
LENGTH = 0x400
# Grab the auxv data.
self.reset_test_sequence()
self.test_sequence.add_log_lines([
"read packet: $qXfer:auxv:read::{:x},{:x}:#00".format(OFFSET, LENGTH),
{"direction":"send", "regex":re.compile(r"^\$([^E])(.*)#[0-9a-fA-F]{2}$", re.MULTILINE|re.DOTALL), "capture":{1:"response_type", 2:"content_raw"} }
], True)
context = self.expect_gdbremote_sequence()
self.assertIsNotNone(context)
# Ensure we end up with all auxv data in one packet.
# FIXME don't assume it all comes back in one packet.
self.assertEqual(context.get("response_type"), "l")
# Decode binary data.
content_raw = context.get("content_raw")
self.assertIsNotNone(content_raw)
return (word_size, self.decode_gdbremote_binary(content_raw))
def supports_auxv(self):
# When non-auxv platforms support llgs, skip the test on platforms
# that don't support auxv.
self.assertTrue(self.has_auxv_support())
#
# We skip the "supports_auxv" test on debugserver. The rest of the tests
# appropriately skip the auxv tests if the support flag is not present
# in the qSupported response, so the debugserver test bits are still there
# in case debugserver code one day does have auxv support and thus those
# tests don't get skipped.
#
@llgs_test
def test_supports_auxv_llgs(self):
self.init_llgs_test()
self.build()
self.set_inferior_startup_launch()
self.supports_auxv()
def auxv_data_is_correct_size(self):
(word_size, auxv_data) = self.get_raw_auxv_data()
self.assertIsNotNone(auxv_data)
# Ensure auxv data is a multiple of 2*word_size (there should be two unsigned long fields per auxv entry).
self.assertEqual(len(auxv_data) % (2*word_size), 0)
# print("auxv contains {} entries".format(len(auxv_data) / (2*word_size)))
@debugserver_test
def test_auxv_data_is_correct_size_debugserver(self):
self.init_debugserver_test()
self.build()
self.set_inferior_startup_launch()
self.auxv_data_is_correct_size()
@llgs_test
def test_auxv_data_is_correct_size_llgs(self):
self.init_llgs_test()
self.build()
self.set_inferior_startup_launch()
self.auxv_data_is_correct_size()
def auxv_keys_look_valid(self):
(word_size, auxv_data) = self.get_raw_auxv_data()
self.assertIsNotNone(auxv_data)
# Grab endian.
self.reset_test_sequence()
self.add_process_info_collection_packets()
context = self.expect_gdbremote_sequence()
self.assertIsNotNone(context)
process_info = self.parse_process_info_response(context)
self.assertIsNotNone(process_info)
endian = process_info.get("endian")
self.assertIsNotNone(endian)
auxv_dict = self.build_auxv_dict(endian, word_size, auxv_data)
self.assertIsNotNone(auxv_dict)
# Verify keys look reasonable.
for auxv_key in auxv_dict:
self.assertTrue(auxv_key >= 1)
self.assertTrue(auxv_key <= 1000)
# print("auxv dict: {}".format(auxv_dict))
@debugserver_test
def test_auxv_keys_look_valid_debugserver(self):
self.init_debugserver_test()
self.build()
self.set_inferior_startup_launch()
self.auxv_keys_look_valid()
@llgs_test
def test_auxv_keys_look_valid_llgs(self):
self.init_llgs_test()
self.build()
self.set_inferior_startup_launch()
self.auxv_keys_look_valid()
def auxv_chunked_reads_work(self):
# Verify that multiple smaller offset,length reads of auxv data
# return the same data as a single larger read.
# Grab the auxv data with a single large read here.
(word_size, auxv_data) = self.get_raw_auxv_data()
self.assertIsNotNone(auxv_data)
# Grab endian.
self.reset_test_sequence()
self.add_process_info_collection_packets()
context = self.expect_gdbremote_sequence()
self.assertIsNotNone(context)
process_info = self.parse_process_info_response(context)
self.assertIsNotNone(process_info)
endian = process_info.get("endian")
self.assertIsNotNone(endian)
auxv_dict = self.build_auxv_dict(endian, word_size, auxv_data)
self.assertIsNotNone(auxv_dict)
iterated_auxv_data = self.read_binary_data_in_chunks("qXfer:auxv:read::", 2*word_size)
self.assertIsNotNone(iterated_auxv_data)
auxv_dict_iterated = self.build_auxv_dict(endian, word_size, iterated_auxv_data)
self.assertIsNotNone(auxv_dict_iterated)
# Verify both types of data collection returned same content.
self.assertEqual(auxv_dict_iterated, auxv_dict)
@debugserver_test
def test_auxv_chunked_reads_work_debugserver(self):
self.init_debugserver_test()
self.build()
self.set_inferior_startup_launch()
self.auxv_chunked_reads_work()
@llgs_test
def test_auxv_chunked_reads_work_llgs(self):
self.init_llgs_test()
self.build()
self.set_inferior_startup_launch()
self.auxv_chunked_reads_work()
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