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 #[cfg(feature = "debug-builtins")] 35 pub(crate) mod debug; 36 pub(crate) mod externals; 37 #[cfg(feature = "async")] 38 pub(crate) mod fiber; 39 pub(crate) mod gc; 40 pub(crate) mod instance; 41 pub(crate) mod instantiate; 42 pub(crate) mod limits; 43 pub(crate) mod linker; 44 pub(crate) mod memory; 45 pub(crate) mod module; 46 pub(crate) mod resources; 47 pub(crate) mod store; 48 pub(crate) mod trampoline; 49 pub(crate) mod trap; 50 pub(crate) mod type_registry; 51 pub(crate) mod types; 52 pub(crate) mod uninhabited; 53 pub(crate) mod v128; 54 pub(crate) mod values; 55 pub(crate) mod vm; 56 57 #[cfg(feature = "component-model")] 58 pub mod component; 59 60 cfg_if::cfg_if! { 61 if #[cfg(miri)] { 62 // no extensions on miri 63 } else if #[cfg(unix)] { 64 pub mod unix; 65 } else if #[cfg(windows)] { 66 pub mod windows; 67 } else { 68 // ... unknown os! 69 } 70 } 71 72 pub use code_memory::CodeMemory; 73 pub use externals::*; 74 pub use func::*; 75 pub use gc::*; 76 pub use instance::{Instance, InstancePre}; 77 pub use instantiate::CompiledModule; 78 pub use limits::*; 79 pub use linker::*; 80 pub use memory::*; 81 pub use module::{Module, ModuleExport}; 82 pub use resources::*; 83 #[cfg(all(feature = "async", feature = "call-hook"))] 84 pub use store::CallHookHandler; 85 pub use store::{ 86 AsContext, AsContextMut, CallHook, Store, StoreContext, StoreContextMut, UpdateDeadline, 87 }; 88 pub use trap::*; 89 pub use types::*; 90 pub use v128::V128; 91 pub use values::*; 92 93 pub(crate) use uninhabited::*; 94 95 #[cfg(feature = "pooling-allocator")] 96 pub use vm::PoolConcurrencyLimitError; 97 98 #[cfg(feature = "profiling")] 99 mod profiling; 100 #[cfg(feature = "profiling")] 101 pub use profiling::GuestProfiler; 102 103 #[cfg(feature = "async")] 104 pub(crate) mod stack; 105 #[cfg(feature = "async")] 106 pub use stack::*; 107 108 #[cfg(feature = "coredump")] 109 mod coredump; 110 #[cfg(feature = "coredump")] 111 pub use coredump::*; 112 113 #[cfg(feature = "wave")] 114 mod wave; 115 116 fn _assertions_runtime() { 117 use crate::_assert_send_and_sync; 118 119 #[cfg(feature = "async")] 120 fn _assert_send<T: Send>(_t: T) {} 121 122 _assert_send_and_sync::<Caller<'_, ()>>(); 123 _assert_send_and_sync::<ExternRef>(); 124 _assert_send_and_sync::<(Func, TypedFunc<(), ()>, Global, Table, Memory)>(); 125 _assert_send_and_sync::<Instance>(); 126 _assert_send_and_sync::<InstancePre<()>>(); 127 _assert_send_and_sync::<InstancePre<*mut u8>>(); 128 _assert_send_and_sync::<Linker<()>>(); 129 _assert_send_and_sync::<Linker<*mut u8>>(); 130 _assert_send_and_sync::<Module>(); 131 _assert_send_and_sync::<Store<()>>(); 132 _assert_send_and_sync::<StoreContext<'_, ()>>(); 133 _assert_send_and_sync::<StoreContextMut<'_, ()>>(); 134 135 #[cfg(feature = "async")] 136 fn _call_async(s: &mut Store<()>, f: Func) { 137 _assert_send(f.call_async(&mut *s, &[], &mut [])) 138 } 139 #[cfg(feature = "async")] 140 fn _typed_call_async(s: &mut Store<()>, f: TypedFunc<(), ()>) { 141 _assert_send(f.call_async(&mut *s, ())) 142 } 143 #[cfg(feature = "async")] 144 fn _instantiate_async(s: &mut Store<()>, m: &Module) { 145 _assert_send(Instance::new_async(s, m, &[])) 146 } 147 } 148