1 // Wasmtime's runtime has lots of fiddly bits where we're doing operations like 2 // casting between wasm i32/i64 and host `usize` values. There's also in general 3 // just lots of pieces of low-level manipulation of memory and internals of VM 4 // runtime state. To help keep all the integer casts correct be a bit more 5 // strict than the default settings to help weed out bugs ahead of time. 6 // 7 // This inevitably leads to wordier code than might otherwise be used because, 8 // for example, `u64 as usize` is warned against and will be an error on CI. 9 // This happens pretty frequently and needs to be replaced with `val.try_into()` 10 // or `usize::try_from(val)` where the error is handled. In some cases the 11 // correct thing to do is to `.unwrap()` the error to indicate a fatal mistake, 12 // but in some cases the correct thing is to propagate the error. 13 // 14 // Some niche cases that explicitly want truncation are recommended to have a 15 // function along the lines of 16 // 17 // #[allow(clippy::cast_possible_truncation)] 18 // fn truncate_i32_to_i8(a: i32) -> i8 { a as i8 } 19 // 20 // as this explicitly indicates the intent of truncation is desired. Other 21 // locations should use fallible conversions. 22 // 23 // If performance is absolutely critical then it's recommended to use `#[allow]` 24 // with a comment indicating why performance is critical as well as a short 25 // explanation of why truncation shouldn't be happening at runtime. This 26 // situation should be pretty rare though. 27 #![warn(clippy::cast_possible_truncation)] 28 29 #[macro_use] 30 pub(crate) mod func; 31 32 pub(crate) mod code; 33 pub(crate) mod code_memory; 34 pub(crate) mod debug; 35 pub(crate) mod externals; 36 pub(crate) mod gc; 37 pub(crate) mod instance; 38 pub(crate) mod instantiate; 39 pub(crate) mod limits; 40 pub(crate) mod linker; 41 pub(crate) mod memory; 42 pub(crate) mod module; 43 pub(crate) mod resources; 44 pub(crate) mod store; 45 pub(crate) mod trampoline; 46 pub(crate) mod trap; 47 pub(crate) mod type_registry; 48 pub(crate) mod types; 49 pub(crate) mod uninhabited; 50 pub(crate) mod v128; 51 pub(crate) mod values; 52 pub(crate) mod vm; 53 54 #[cfg(feature = "component-model")] 55 pub mod component; 56 57 cfg_if::cfg_if! { 58 if #[cfg(miri)] { 59 // no extensions on miri 60 } else if #[cfg(unix)] { 61 pub mod unix; 62 } else if #[cfg(windows)] { 63 pub mod windows; 64 } else { 65 // ... unknown os! 66 } 67 } 68 69 pub use code_memory::CodeMemory; 70 pub use externals::*; 71 pub use func::*; 72 pub use gc::*; 73 pub use instance::{Instance, InstancePre}; 74 pub use instantiate::CompiledModule; 75 pub use limits::*; 76 pub use linker::*; 77 pub use memory::*; 78 pub use module::{Module, ModuleExport}; 79 pub use resources::*; 80 #[cfg(all(feature = "async", feature = "call-hook"))] 81 pub use store::CallHookHandler; 82 pub use store::{ 83 AsContext, AsContextMut, CallHook, Store, StoreContext, StoreContextMut, UpdateDeadline, 84 }; 85 pub use trap::*; 86 pub use types::*; 87 pub use v128::V128; 88 pub use values::*; 89 90 pub(crate) use uninhabited::*; 91 92 #[cfg(feature = "pooling-allocator")] 93 pub use vm::PoolConcurrencyLimitError; 94 95 #[cfg(feature = "profiling")] 96 mod profiling; 97 #[cfg(feature = "profiling")] 98 pub use profiling::GuestProfiler; 99 100 #[cfg(feature = "async")] 101 pub(crate) mod stack; 102 #[cfg(feature = "async")] 103 pub use stack::*; 104 105 #[cfg(feature = "coredump")] 106 mod coredump; 107 #[cfg(feature = "coredump")] 108 pub use coredump::*; 109 110 #[cfg(feature = "wave")] 111 mod wave; 112 113 fn _assertions_runtime() { 114 use crate::_assert_send_and_sync; 115 116 #[cfg(feature = "async")] 117 fn _assert_send<T: Send>(_t: T) {} 118 119 _assert_send_and_sync::<Caller<'_, ()>>(); 120 _assert_send_and_sync::<ExternRef>(); 121 _assert_send_and_sync::<(Func, TypedFunc<(), ()>, Global, Table, Memory)>(); 122 _assert_send_and_sync::<Instance>(); 123 _assert_send_and_sync::<InstancePre<()>>(); 124 _assert_send_and_sync::<InstancePre<*mut u8>>(); 125 _assert_send_and_sync::<Linker<()>>(); 126 _assert_send_and_sync::<Linker<*mut u8>>(); 127 _assert_send_and_sync::<Module>(); 128 _assert_send_and_sync::<Store<()>>(); 129 _assert_send_and_sync::<StoreContext<'_, ()>>(); 130 _assert_send_and_sync::<StoreContextMut<'_, ()>>(); 131 132 #[cfg(feature = "async")] 133 fn _call_async(s: &mut Store<()>, f: Func) { 134 _assert_send(f.call_async(&mut *s, &[], &mut [])) 135 } 136 #[cfg(feature = "async")] 137 fn _typed_call_async(s: &mut Store<()>, f: TypedFunc<(), ()>) { 138 _assert_send(f.call_async(&mut *s, ())) 139 } 140 #[cfg(feature = "async")] 141 fn _instantiate_async(s: &mut Store<()>, m: &Module) { 142 _assert_send(Instance::new_async(s, m, &[])) 143 } 144 } 145