1 use anyhow::Result; 2 use wasmtime::*; 3 4 #[test] 5 fn wrong_import_numbers() -> Result<()> { 6 let mut store = Store::<()>::default(); 7 let module = Module::new(store.engine(), r#"(module (import "" "" (func)))"#)?; 8 9 assert!(Instance::new(&mut store, &module, &[]).is_err()); 10 let func = Func::wrap(&mut store, || {}); 11 assert!(Instance::new(&mut store, &module, &[func.clone().into(), func.into()]).is_err()); 12 Ok(()) 13 } 14 15 #[test] 16 fn initializes_linear_memory() -> Result<()> { 17 // Test for https://github.com/bytecodealliance/wasmtime/issues/2784 18 let wat = r#" 19 (module 20 (memory (export "memory") 2) 21 (data (i32.const 0) "Hello World!") 22 )"#; 23 let module = Module::new(&Engine::default(), wat)?; 24 25 let mut store = Store::new(module.engine(), ()); 26 let instance = Instance::new(&mut store, &module, &[])?; 27 let memory = instance.get_memory(&mut store, "memory").unwrap(); 28 29 let mut bytes = [0; 12]; 30 memory.read(&store, 0, &mut bytes)?; 31 assert_eq!(bytes, "Hello World!".as_bytes()); 32 Ok(()) 33 } 34 35 #[test] 36 fn linear_memory_limits() -> Result<()> { 37 // this test will allocate 4GB of virtual memory space, and may not work in 38 // situations like CI QEMU emulation where it triggers SIGKILL. 39 if std::env::var("WASMTIME_TEST_NO_HOG_MEMORY").is_ok() { 40 return Ok(()); 41 } 42 test(&Engine::default())?; 43 test(&Engine::new(Config::new().allocation_strategy( 44 InstanceAllocationStrategy::Pooling { 45 strategy: PoolingAllocationStrategy::NextAvailable, 46 module_limits: ModuleLimits { 47 memory_pages: 65536, 48 ..ModuleLimits::default() 49 }, 50 instance_limits: InstanceLimits::default(), 51 }, 52 ))?)?; 53 return Ok(()); 54 55 fn test(engine: &Engine) -> Result<()> { 56 let wat = r#" 57 (module 58 (memory 65534) 59 60 (func (export "grow") (result i32) 61 i32.const 1 62 memory.grow) 63 (func (export "size") (result i32) 64 memory.size) 65 ) 66 "#; 67 let module = Module::new(engine, wat)?; 68 69 let mut store = Store::new(engine, ()); 70 let instance = Instance::new(&mut store, &module, &[])?; 71 let size = instance.get_typed_func::<(), i32, _>(&mut store, "size")?; 72 let grow = instance.get_typed_func::<(), i32, _>(&mut store, "grow")?; 73 74 assert_eq!(size.call(&mut store, ())?, 65534); 75 assert_eq!(grow.call(&mut store, ())?, 65534); 76 assert_eq!(size.call(&mut store, ())?, 65535); 77 assert_eq!(grow.call(&mut store, ())?, 65535); 78 assert_eq!(size.call(&mut store, ())?, 65536); 79 assert_eq!(grow.call(&mut store, ())?, -1); 80 assert_eq!(size.call(&mut store, ())?, 65536); 81 Ok(()) 82 } 83 } 84