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fa13e1b0c5build: Add option --enable-danger-fuzz-link-all (MarcoFalke)44444ba759fuzz: Link all targets once (MarcoFalke) Pull request description: Currently the linker is invoked more than 150 times when compiling with `--enable-fuzz`. This is problematic for several reasons: * It wastes disk space north of 20 GB, as all libraries and sanitizers are linked more than 150 times * It wastes CPU time, as the link step can practically not be cached (similar to ccache for object files) * It makes it a blocker to compile the fuzz tests by default for non-fuzz builds #19388, for the aforementioned reasons * The build file is several thousand lines of code, without doing anything meaningful except listing each fuzz target in a highly verbose manner * It makes writing new fuzz tests unnecessarily hard, as build system knowledge is required; Compare that to boost unit tests, which can be added by simply editing an existing cpp file * It encourages fuzz tests that re-use the `buffer` or assume the `buffer` to be concatenations of seeds, which increases complexity of seeds and complexity for the fuzz engine to explore; Thus reducing the effectiveness of the affected fuzz targets Fixes #20088 ACKs for top commit: practicalswift: Tested ACKfa13e1b0c5sipa: ACKfa13e1b0c5. Reviewed the code changes, and tested the 3 different test_runner.py modes (run once, merge, generate). I also tested building with the new --enable-danger-fuzz-link-all Tree-SHA512: 962ab33269ebd51810924c51266ecc62edd6ddf2fcd9a8c359ed906766f58c3f73c223f8d3cc49f2c60f0053f65e8bdd86ce9c19e673f8c2b3cd676e913f2642
53 lines
2.2 KiB
C++
53 lines
2.2 KiB
C++
// Copyright (c) 2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <chainparams.h>
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#include <chainparamsbase.h>
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#include <key.h>
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#include <pubkey.h>
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#include <script/sigcache.h>
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#include <test/fuzz/FuzzedDataProvider.h>
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#include <test/fuzz/fuzz.h>
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#include <test/fuzz/util.h>
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#include <cstdint>
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#include <optional>
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#include <string>
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#include <vector>
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void initialize_script_sigcache()
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{
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static const ECCVerifyHandle ecc_verify_handle;
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ECC_Start();
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SelectParams(CBaseChainParams::REGTEST);
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InitSignatureCache();
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}
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FUZZ_TARGET_INIT(script_sigcache, initialize_script_sigcache)
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{
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FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
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const std::optional<CMutableTransaction> mutable_transaction = ConsumeDeserializable<CMutableTransaction>(fuzzed_data_provider);
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const CTransaction tx{mutable_transaction ? *mutable_transaction : CMutableTransaction{}};
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const unsigned int n_in = fuzzed_data_provider.ConsumeIntegral<unsigned int>();
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const CAmount amount = ConsumeMoney(fuzzed_data_provider);
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const bool store = fuzzed_data_provider.ConsumeBool();
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PrecomputedTransactionData tx_data;
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CachingTransactionSignatureChecker caching_transaction_signature_checker{mutable_transaction ? &tx : nullptr, n_in, amount, store, tx_data};
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if (fuzzed_data_provider.ConsumeBool()) {
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const auto random_bytes = fuzzed_data_provider.ConsumeBytes<unsigned char>(64);
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const XOnlyPubKey pub_key(ConsumeUInt256(fuzzed_data_provider));
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if (random_bytes.size() == 64) {
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(void)caching_transaction_signature_checker.VerifySchnorrSignature(random_bytes, pub_key, ConsumeUInt256(fuzzed_data_provider));
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}
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} else {
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const auto random_bytes = ConsumeRandomLengthByteVector(fuzzed_data_provider);
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const auto pub_key = ConsumeDeserializable<CPubKey>(fuzzed_data_provider);
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if (pub_key) {
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if (!random_bytes.empty()) {
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(void)caching_transaction_signature_checker.VerifyECDSASignature(random_bytes, *pub_key, ConsumeUInt256(fuzzed_data_provider));
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}
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}
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}
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}
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