wasmtime 44.0.0

High-level API to expose the Wasmtime runtime
Documentation 
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use crate::prelude::*;

pub type SignalHandler = Box<dyn Fn() + Send + Sync>;

#[cfg(has_native_signals)]
pub struct TrapHandler;

#[cfg(has_native_signals)]
impl TrapHandler {
    pub unsafe fn new(_macos_use_mach_ports: bool) -> TrapHandler {
        unsafe {
            crate::runtime::vm::sys::capi::wasmtime_init_traps(handle_trap);
        }
        TrapHandler
    }

    pub fn validate_config(&self, _macos_use_mach_ports: bool) {}
}

#[cfg(has_native_signals)]
extern "C" fn handle_trap(pc: usize, fp: usize, has_faulting_addr: bool, faulting_addr: usize) {
    use crate::runtime::vm::traphandlers::{TrapRegisters, TrapTest, tls};

    tls::with(|info| {
        let info = match info {
            Some(info) => info,
            None => return,
        };
        let faulting_addr = if has_faulting_addr {
            Some(faulting_addr)
        } else {
            None
        };
        let regs = TrapRegisters { pc, fp };
        let test = info.test_if_trap(regs, faulting_addr, |_handler| {
            panic!("custom signal handlers are not supported on this platform");
        });
        match test {
            TrapTest::NotWasm => {}
            TrapTest::HandledByEmbedder => unreachable!(),
            TrapTest::Trap(handler) => unsafe { handler.resume_tailcc(0, 0) },
        }
    })
}

pub fn lazy_per_thread_init() {}