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2883c855e0
PR-URL: https://github.com/nodejs/node/pull/32116 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
97 lines
3.3 KiB
Python
97 lines
3.3 KiB
Python
# Copyright 2018 the V8 project authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import random
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# List of configuration experiments for correctness fuzzing.
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# List of <probability>, <1st config name>, <2nd config name>, <2nd d8>.
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# Probabilities must add up to 100.
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FOOZZIE_EXPERIMENTS = [
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[10, 'ignition', 'jitless', 'd8'],
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[10, 'ignition', 'slow_path', 'd8'],
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[5, 'ignition', 'slow_path_opt', 'd8'],
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[25, 'ignition', 'ignition_turbo', 'd8'],
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[2, 'ignition_no_ic', 'ignition_turbo', 'd8'],
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[2, 'ignition', 'ignition_turbo_no_ic', 'd8'],
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[15, 'ignition', 'ignition_turbo_opt', 'd8'],
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[2, 'ignition_no_ic', 'ignition_turbo_opt', 'd8'],
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[4, 'ignition_turbo_opt', 'ignition_turbo_opt', 'clang_x64_pointer_compression/d8'],
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[5, 'ignition_turbo', 'ignition_turbo', 'clang_x64_pointer_compression/d8'],
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[4, 'ignition_turbo_opt', 'ignition_turbo_opt', 'clang_x86/d8'],
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[4, 'ignition_turbo', 'ignition_turbo', 'clang_x86/d8'],
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[4, 'ignition', 'ignition', 'clang_x86/d8'],
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[4, 'ignition', 'ignition', 'clang_x64_v8_arm64/d8'],
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[4, 'ignition', 'ignition', 'clang_x86_v8_arm/d8'],
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]
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# Additional flag experiments. List of tuples like
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# (<likelihood to use flags in [0,1)>, <flag>).
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ADDITIONAL_FLAGS = [
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(0.1, '--stress-marking=100'),
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(0.1, '--stress-scavenge=100'),
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(0.1, '--stress-compaction-random'),
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(0.1, '--random-gc-interval=2000'),
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(0.2, '--noanalyze-environment-liveness'),
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(0.1, '--stress-delay-tasks'),
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(0.01, '--thread-pool-size=1'),
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(0.01, '--thread-pool-size=2'),
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(0.01, '--thread-pool-size=4'),
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(0.01, '--thread-pool-size=8'),
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(0.1, '--interrupt-budget=1000'),
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(0.25, '--future'),
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(0.2, '--no-regexp-tier-up'),
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(0.1, '--regexp-interpret-all'),
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(0.1, '--regexp-tier-up-ticks=10'),
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(0.1, '--regexp-tier-up-ticks=100'),
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(0.1, '--turbo-instruction-scheduling'),
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(0.1, '--turbo-stress-instruction-scheduling'),
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(0.1, '--no-enable-sse3'),
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(0.1, '--no-enable-ssse3'),
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(0.1, '--no-enable-sse4_1'),
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(0.1, '--no-enable-sse4_2'),
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(0.1, '--no-enable-sahf'),
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(0.1, '--no-enable-avx'),
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(0.1, '--no-enable-fma3'),
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(0.1, '--no-enable-bmi1'),
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(0.1, '--no-enable-bmi2'),
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(0.1, '--no-enable-lzcnt'),
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(0.1, '--no-enable-popcnt'),
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]
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class Config(object):
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def __init__(self, name, rng=None):
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"""
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Args:
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name: Name of the used fuzzer.
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rng: Random number generator for generating experiments.
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random_seed: Random-seed used for d8 throughout one fuzz session.
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"""
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self.name = name
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self.rng = rng or random.Random()
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def choose_foozzie_flags(self):
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"""Randomly chooses a configuration from FOOZZIE_EXPERIMENTS.
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Returns: List of flags to pass to v8_foozzie.py fuzz harness.
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"""
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# Add additional flags to second config based on experiment percentages.
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extra_flags = []
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for p, flag in ADDITIONAL_FLAGS:
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if self.rng.random() < p:
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extra_flags.append('--second-config-extra-flags=%s' % flag)
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# Calculate flags determining the experiment.
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acc = 0
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threshold = self.rng.random() * 100
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for prob, first_config, second_config, second_d8 in FOOZZIE_EXPERIMENTS:
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acc += prob
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if acc > threshold:
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return [
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'--first-config=' + first_config,
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'--second-config=' + second_config,
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'--second-d8=' + second_d8,
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] + extra_flags
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assert False
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