1 // Copyright 2021, The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #![allow(missing_docs)] 16 #![no_main] 17 #![feature(bench_black_box)] 18 19 use hashlink::LruCache; 20 use libfuzzer_sys::arbitrary::Arbitrary; 21 use libfuzzer_sys::fuzz_target; 22 23 #[derive(Arbitrary, Debug, Eq, Hash, PartialEq)] 24 enum Data { 25 A, 26 B, 27 Int { val: u8 }, 28 } 29 30 #[derive(Arbitrary, Debug)] 31 struct LruCacheFuzzInfo { 32 capacity: u8, 33 commands: Vec<LruCacheMethods>, 34 } 35 36 #[derive(Arbitrary, Debug)] 37 enum LruCacheMethods { 38 Insert { key: Data, value: Data }, 39 Remove { key: Data }, 40 ContainsKey { key: Data }, 41 Get { key: Data }, 42 EntryOrInsert { key: Data, value: Data }, 43 Iter, 44 Drain, 45 Clear, 46 Peek { key: Data }, 47 RemoveLru, 48 } 49 50 fuzz_target!(|info: LruCacheFuzzInfo| { 51 let mut cache = LruCache::new(info.capacity.into()); 52 for command in info.commands { 53 match command { 54 LruCacheMethods::Insert { key, value } => { 55 cache.insert(key, value); 56 } 57 LruCacheMethods::Remove { key } => { 58 cache.remove(&key); 59 } 60 LruCacheMethods::ContainsKey { key } => { 61 cache.contains_key(&key); 62 } 63 LruCacheMethods::Get { key } => { 64 cache.get(&key); 65 } 66 LruCacheMethods::EntryOrInsert { key, value } => { 67 cache.entry(key).or_insert(value); 68 } 69 LruCacheMethods::Iter => { 70 std::hint::black_box(cache.iter().count()); 71 } 72 LruCacheMethods::Drain => { 73 std::hint::black_box(cache.drain().count()); 74 } 75 LruCacheMethods::Clear => { 76 cache.clear(); 77 } 78 LruCacheMethods::Peek { key } => { 79 cache.peek(&key); 80 } 81 LruCacheMethods::RemoveLru => { 82 cache.remove_lru(); 83 } 84 } 85 } 86 }); 87