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Implement RFC 11: Redesigning Wasmtime's APIs (#2897)

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Implement Wasmtime's new API as designed by RFC 11. This is quite a large commit which has had lots of discussion externally, so for more information it's best to read the RFC thread and the PR thread.
This commit is contained in:
Alex Crichton
2021-06-03 09:10:53 -05:00
committed by GitHub
parent a5a28b1c5b
commit 7a1b7cdf92
233 changed files with 13349 additions and 11997 deletions
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42
examples/interrupt.c
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@@ -61,11 +61,12 @@ int main() {
wasmtime_config_interruptable_set(config, true);
wasm_engine_t *engine = wasm_engine_new_with_config(config);
assert(engine != NULL);
wasm_store_t *store = wasm_store_new(engine);
wasmtime_store_t *store = wasmtime_store_new(engine, NULL, NULL);
assert(store != NULL);
wasmtime_context_t *context = wasmtime_store_context(store);
// Create our interrupt handle we'll use later
wasmtime_interrupt_handle_t *handle = wasmtime_interrupt_handle_new(store);
wasmtime_interrupt_handle_t *handle = wasmtime_interrupt_handle_new(context);
assert(handle != NULL);
// Read our input file, which in this case is a wasm text file.
@@ -81,50 +82,45 @@ int main() {
// Parse the wat into the binary wasm format
wasm_byte_vec_t wasm;
wasmtime_error_t *error = wasmtime_wat2wasm(&wat, &wasm);
wasmtime_error_t *error = wasmtime_wat2wasm(wat.data, wat.size, &wasm);
if (error != NULL)
exit_with_error("failed to parse wat", error, NULL);
wasm_byte_vec_delete(&wat);
// Now that we've got our binary webassembly we can compile our module.
wasm_module_t *module = NULL;
wasm_trap_t *trap = NULL;
wasm_instance_t *instance = NULL;
wasm_extern_vec_t imports = WASM_EMPTY_VEC;
error = wasmtime_module_new(engine, &wasm, &module);
wasmtime_module_t *module = NULL;
error = wasmtime_module_new(engine, (uint8_t*) wasm.data, wasm.size, &module);
wasm_byte_vec_delete(&wasm);
if (error != NULL)
exit_with_error("failed to compile module", error, NULL);
error = wasmtime_instance_new(store, module, &imports, &instance, &trap);
if (instance == NULL)
wasm_trap_t *trap = NULL;
wasmtime_instance_t instance;
error = wasmtime_instance_new(context, module, NULL, 0, &instance, &trap);
if (error != NULL || trap != NULL)
exit_with_error("failed to instantiate", error, trap);
wasmtime_module_delete(module);
// Lookup our `run` export function
wasm_extern_vec_t externs;
wasm_instance_exports(instance, &externs);
assert(externs.size == 1);
wasm_func_t *run = wasm_extern_as_func(externs.data[0]);
assert(run != NULL);
wasmtime_extern_t run;
bool ok = wasmtime_instance_export_get(context, &instance, "run", 3, &run);
assert(ok);
assert(run.kind == WASMTIME_EXTERN_FUNC);
// Spawn a thread to send us an interrupt after a period of time.
spawn_interrupt(handle);
// And call it!
printf("Entering infinite loop...\n");
wasm_val_vec_t args_vec = WASM_EMPTY_VEC;
wasm_val_vec_t results_vec = WASM_EMPTY_VEC;
error = wasmtime_func_call(run, &args_vec, &results_vec, &trap);
error = wasmtime_func_call(context, &run.of.func, NULL, 0, NULL, 0, &trap);
assert(error == NULL);
assert(trap != NULL);
printf("Got a trap!...\n");
// `trap` can be inspected here to see the trap message has an interrupt in it
wasm_trap_delete(trap);
wasm_extern_vec_delete(&externs);
wasm_instance_delete(instance);
wasm_module_delete(module);
wasm_store_delete(store);
wasmtime_store_delete(store);
wasm_engine_delete(engine);
return 0;
}