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Diffstat (limited to 'test/functional/interface_usdt_validation.py')
-rwxr-xr-x | test/functional/interface_usdt_validation.py | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/test/functional/interface_usdt_validation.py b/test/functional/interface_usdt_validation.py new file mode 100755 index 0000000000..d11809273b --- /dev/null +++ b/test/functional/interface_usdt_validation.py @@ -0,0 +1,136 @@ +#!/usr/bin/env python3 +# Copyright (c) 2022 The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or http://www.opensource.org/licenses/mit-license.php. + +""" Tests the validation:* tracepoint API interface. + See https://github.com/bitcoin/bitcoin/blob/master/doc/tracing.md#context-validation +""" + +import ctypes + +# Test will be skipped if we don't have bcc installed +try: + from bcc import BPF, USDT # type: ignore[import] +except ImportError: + pass + +from test_framework.address import ADDRESS_BCRT1_UNSPENDABLE +from test_framework.test_framework import BitcoinTestFramework +from test_framework.util import assert_equal + + +validation_blockconnected_program = """ +#include <uapi/linux/ptrace.h> + +typedef signed long long i64; + +struct connected_block +{ + char hash[32]; + int height; + i64 transactions; + int inputs; + i64 sigops; + u64 duration; +}; + +BPF_PERF_OUTPUT(block_connected); +int trace_block_connected(struct pt_regs *ctx) { + struct connected_block block = {}; + bpf_usdt_readarg_p(1, ctx, &block.hash, 32); + bpf_usdt_readarg(2, ctx, &block.height); + bpf_usdt_readarg(3, ctx, &block.transactions); + bpf_usdt_readarg(4, ctx, &block.inputs); + bpf_usdt_readarg(5, ctx, &block.sigops); + bpf_usdt_readarg(6, ctx, &block.duration); + block_connected.perf_submit(ctx, &block, sizeof(block)); + return 0; +} +""" + + +class ValidationTracepointTest(BitcoinTestFramework): + def set_test_params(self): + self.num_nodes = 1 + + def skip_test_if_missing_module(self): + self.skip_if_platform_not_linux() + self.skip_if_no_bitcoind_tracepoints() + self.skip_if_no_python_bcc() + self.skip_if_no_bpf_permissions() + + def run_test(self): + # Tests the validation:block_connected tracepoint by generating blocks + # and comparing the values passed in the tracepoint arguments with the + # blocks. + # See https://github.com/bitcoin/bitcoin/blob/master/doc/tracing.md#tracepoint-validationblock_connected + + class Block(ctypes.Structure): + _fields_ = [ + ("hash", ctypes.c_ubyte * 32), + ("height", ctypes.c_int), + ("transactions", ctypes.c_int64), + ("inputs", ctypes.c_int), + ("sigops", ctypes.c_int64), + ("duration", ctypes.c_uint64), + ] + + def __repr__(self): + return "ConnectedBlock(hash=%s height=%d, transactions=%d, inputs=%d, sigops=%d, duration=%d)" % ( + bytes(self.hash[::-1]).hex(), + self.height, + self.transactions, + self.inputs, + self.sigops, + self.duration) + + # The handle_* function is a ctypes callback function called from C. When + # we assert in the handle_* function, the AssertError doesn't propagate + # back to Python. The exception is ignored. We manually count and assert + # that the handle_* functions succeeded. + BLOCKS_EXPECTED = 2 + blocks_checked = 0 + expected_blocks = list() + + self.log.info("hook into the validation:block_connected tracepoint") + ctx = USDT(path=str(self.options.bitcoind)) + ctx.enable_probe(probe="validation:block_connected", + fn_name="trace_block_connected") + bpf = BPF(text=validation_blockconnected_program, + usdt_contexts=[ctx], debug=0) + + def handle_blockconnected(_, data, __): + nonlocal expected_blocks, blocks_checked + event = ctypes.cast(data, ctypes.POINTER(Block)).contents + self.log.info(f"handle_blockconnected(): {event}") + block = expected_blocks.pop(0) + assert_equal(block["hash"], bytes(event.hash[::-1]).hex()) + assert_equal(block["height"], event.height) + assert_equal(len(block["tx"]), event.transactions) + assert_equal(len([tx["vin"] for tx in block["tx"]]), event.inputs) + assert_equal(0, event.sigops) # no sigops in coinbase tx + # only plausibility checks + assert(event.duration > 0) + + blocks_checked += 1 + + bpf["block_connected"].open_perf_buffer( + handle_blockconnected) + + self.log.info(f"mine {BLOCKS_EXPECTED} blocks") + block_hashes = self.generatetoaddress( + self.nodes[0], BLOCKS_EXPECTED, ADDRESS_BCRT1_UNSPENDABLE) + for block_hash in block_hashes: + expected_blocks.append(self.nodes[0].getblock(block_hash, 2)) + + bpf.perf_buffer_poll(timeout=200) + bpf.cleanup() + + self.log.info(f"check that we traced {BLOCKS_EXPECTED} blocks") + assert_equal(BLOCKS_EXPECTED, blocks_checked) + assert_equal(0, len(expected_blocks)) + + +if __name__ == '__main__': + ValidationTracepointTest().main() |