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import gdbremote_testcase
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class TestGdbRemoteAuxvSupport(gdbremote_testcase.GdbRemoteTestCaseBase):
AUXV_SUPPORT_FEATURE_NAME = "qXfer:auxv:read"
def has_auxv_support(self):
procs = self.prep_debug_monitor_and_inferior()
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.assertIn("ptrsize", 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))
@skipIfWindows # no auxv support.
@skipIfDarwin
def test_supports_auxv(self):
self.build()
self.set_inferior_startup_launch()
self.assertTrue(self.has_auxv_support())
@skipIfWindows
@expectedFailureNetBSD
def test_auxv_data_is_correct_size(self):
self.build()
self.set_inferior_startup_launch()
(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)
self.trace("auxv contains {} entries".format(len(auxv_data) / (2 * word_size)))
@skipIfWindows
@expectedFailureNetBSD
def test_auxv_keys_look_valid(self):
self.build()
self.set_inferior_startup_launch()
(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. While AUX values are most commonly
# small (usually smaller than 50), they can sometimes be larger.
self.trace("auxv dict: {}".format(auxv_dict))
for auxv_key in auxv_dict:
self.assertTrue(auxv_key >= 1)
self.assertTrue(auxv_key <= 2500)
@skipIfWindows
@expectedFailureNetBSD
def test_auxv_chunked_reads_work(self):
self.build()
self.set_inferior_startup_launch()
# 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)
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