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Fix C API to allow calling an exported func

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This commit is contained in:
Brandon Fish
2019-02-24 12:22:24 -06:00
parent 82eef13f41
commit b008a054de
5 changed files with 455 additions and 275 deletions
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322
lib/runtime-c-api/src/lib.rs
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@ -16,9 +16,6 @@ use wasmer_runtime_core::import::Namespace;
use wasmer_runtime_core::types::{ElementType, FuncSig, MemoryDescriptor, TableDescriptor, Type};
use wasmer_runtime_core::units::{Bytes, Pages};
#[allow(non_camel_case_types)]
pub struct wasmer_import_object_t();
#[allow(non_camel_case_types)]
pub struct wasmer_module_t();
@ -78,7 +75,11 @@ pub struct wasmer_table_t();
#[repr(C)]
#[derive(Clone)]
pub struct wasmer_func_t();
pub struct wasmer_import_func_t();
#[repr(C)]
#[derive(Clone)]
pub struct wasmer_export_func_t();
#[repr(C)]
#[derive(Clone)]
@ -96,14 +97,6 @@ pub struct wasmer_limit_option_t {
pub some: uint32_t,
}
#[repr(C)]
pub struct wasmer_func_signature {
pub params: *const wasmer_value_tag,
pub params_len: c_int,
pub returns: *const wasmer_value_tag,
pub returns_len: c_int,
}
#[repr(C)]
pub struct wasmer_import_t {
module_name: wasmer_byte_array,
@ -132,7 +125,7 @@ pub enum wasmer_import_export_kind {
#[repr(C)]
#[derive(Clone, Copy)]
pub union wasmer_import_export_value {
func: *const wasmer_func_t,
func: *const wasmer_import_func_t,
table: *const wasmer_table_t,
memory: *const wasmer_memory_t,
global: *const wasmer_global_t,
@ -647,9 +640,16 @@ pub unsafe extern "C" fn wasmer_instance_exports(
instance: *mut wasmer_instance_t,
exports: *mut *mut wasmer_exports_t,
) {
let mut instance = unsafe { &mut *(instance as *mut Instance) };
let named_exports: Box<NamedExports> =
Box::new(NamedExports(instance.exports().map(|e| e.into()).collect()));
let mut instance_ref = unsafe { &mut *(instance as *mut Instance) };
let mut exports_vec: Vec<NamedExport> = Vec::with_capacity(instance_ref.exports().count());
for (name, export) in instance_ref.exports() {
exports_vec.push(NamedExport {
name: name.clone(),
export: export.clone(),
instance: instance as *mut Instance,
});
}
let named_exports: Box<NamedExports> = Box::new(NamedExports(exports_vec));
unsafe { *exports = Box::into_raw(named_exports) as *mut wasmer_exports_t };
}
@ -704,18 +704,157 @@ pub unsafe extern "C" fn wasmer_export_kind(
}
}
/// Creates new func
/// Sets the result parameter to the arity of the params of the wasmer_export_func_t
///
/// The caller owns the object and should call `wasmer_func_destroy` to free it.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_func_new(
pub unsafe extern "C" fn wasmer_export_func_params_arity(
func: *mut wasmer_export_func_t,
result: *mut uint32_t,
) -> wasmer_result_t {
let mut named_export = unsafe { &*(func as *mut NamedExport) };
let mut export = &named_export.export;
let result = if let Export::Function { ref signature, .. } = *export {
unsafe { *result = signature.params().len() as uint32_t };
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_export_func_params_arity".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Sets the params buffer to the parameter types of the given wasmer_export_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_export_func_params(
func: *mut wasmer_export_func_t,
params: *mut wasmer_value_tag,
params_len: c_int,
) -> wasmer_result_t {
let mut named_export = unsafe { &*(func as *mut NamedExport) };
let mut export = &named_export.export;
let result = if let Export::Function { ref signature, .. } = *export {
let params: &mut [wasmer_value_tag] =
slice::from_raw_parts_mut(params, params_len as usize);
for (i, item) in signature.params().iter().enumerate() {
params[i] = item.into();
}
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_export_func_params".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Sets the returns buffer to the parameter types of the given wasmer_export_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_export_func_returns(
func: *mut wasmer_export_func_t,
returns: *mut wasmer_value_tag,
returns_len: c_int,
) -> wasmer_result_t {
let mut named_export = unsafe { &*(func as *mut NamedExport) };
let mut export = &named_export.export;
let result = if let Export::Function { ref signature, .. } = *export {
let returns: &mut [wasmer_value_tag] =
slice::from_raw_parts_mut(returns, returns_len as usize);
for (i, item) in signature.returns().iter().enumerate() {
returns[i] = item.into();
}
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_export_func_returns".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Sets the result parameter to the arity of the returns of the wasmer_export_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_export_func_returns_arity(
func: *mut wasmer_export_func_t,
result: *mut uint32_t,
) -> wasmer_result_t {
let mut named_export = unsafe { &*(func as *mut NamedExport) };
let mut export = &named_export.export;
let result = if let Export::Function { ref signature, .. } = *export {
unsafe { *result = signature.returns().len() as uint32_t };
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_export_func_results_arity".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Sets the result parameter to the arity of the params of the wasmer_import_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_import_func_params_arity(
func: *mut wasmer_import_func_t,
result: *mut uint32_t,
) -> wasmer_result_t {
let mut export = unsafe { &mut *(func as *mut Export) };
let result = if let Export::Function { ref signature, .. } = *export {
unsafe { *result = signature.params().len() as uint32_t };
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_import_func_params_arity".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Creates new func
///
/// The caller owns the object and should call `wasmer_import_func_destroy` to free it.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_import_func_new(
func: extern "C" fn(data: *mut c_void),
params: *const wasmer_value_tag,
params_len: c_int,
returns: *const wasmer_value_tag,
returns_len: c_int,
) -> *const wasmer_func_t {
) -> *const wasmer_import_func_t {
let params: &[wasmer_value_tag] = slice::from_raw_parts(params, params_len as usize);
let params: Vec<Type> = params.iter().cloned().map(|x| x.into()).collect();
let returns: &[wasmer_value_tag] = slice::from_raw_parts(returns, returns_len as usize);
@ -726,10 +865,10 @@ pub unsafe extern "C" fn wasmer_func_new(
ctx: Context::Internal,
signature: Arc::new(FuncSig::new(params, returns)),
});
Box::into_raw(export) as *mut wasmer_func_t
Box::into_raw(export) as *mut wasmer_import_func_t
}
/// Sets the result parameter to the arity of the params of the wasmer_func_t
/// Sets the params buffer to the parameter types of the given wasmer_import_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
@ -737,33 +876,8 @@ pub unsafe extern "C" fn wasmer_func_new(
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_func_params_arity(
func: *mut wasmer_func_t,
result: *mut uint32_t,
) -> wasmer_result_t {
let mut export = unsafe { &mut *(func as *mut Export) };
let result = if let Export::Function { ref signature, .. } = *export {
unsafe { *result = signature.params().len() as uint32_t };
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_func_params_arity".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Sets the params buffer to the parameter types of the given wasmer_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_func_params(
func: *mut wasmer_func_t,
pub unsafe extern "C" fn wasmer_import_func_params(
func: *mut wasmer_import_func_t,
params: *mut wasmer_value_tag,
params_len: c_int,
) -> wasmer_result_t {
@ -777,14 +891,14 @@ pub unsafe extern "C" fn wasmer_func_params(
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_func_params".to_string(),
msg: "func ptr error in wasmer_import_func_params".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Sets the returns buffer to the parameter types of the given wasmer_func_t
/// Sets the returns buffer to the parameter types of the given wasmer_import_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
@ -792,8 +906,8 @@ pub unsafe extern "C" fn wasmer_func_params(
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_func_returns(
func: *mut wasmer_func_t,
pub unsafe extern "C" fn wasmer_import_func_returns(
func: *mut wasmer_import_func_t,
returns: *mut wasmer_value_tag,
returns_len: c_int,
) -> wasmer_result_t {
@ -807,14 +921,14 @@ pub unsafe extern "C" fn wasmer_func_returns(
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_func_returns".to_string(),
msg: "func ptr error in wasmer_import_func_returns".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
result
}
/// Sets the result parameter to the arity of the returns of the wasmer_func_t
/// Sets the result parameter to the arity of the returns of the wasmer_import_func_t
///
/// Returns `wasmer_result_t::WASMER_OK` upon success.
///
@ -822,8 +936,8 @@ pub unsafe extern "C" fn wasmer_func_returns(
/// and `wasmer_last_error_message` to get an error message.
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_func_returns_arity(
func: *mut wasmer_func_t,
pub unsafe extern "C" fn wasmer_import_func_returns_arity(
func: *mut wasmer_import_func_t,
result: *mut uint32_t,
) -> wasmer_result_t {
let mut export = unsafe { &*(func as *mut Export) };
@ -832,7 +946,7 @@ pub unsafe extern "C" fn wasmer_func_returns_arity(
wasmer_result_t::WASMER_OK
} else {
update_last_error(CApiError {
msg: "func ptr error in wasmer_func_results_arity".to_string(),
msg: "func ptr error in wasmer_import_func_results_arity".to_string(),
});
wasmer_result_t::WASMER_ERROR
};
@ -842,20 +956,19 @@ pub unsafe extern "C" fn wasmer_func_returns_arity(
/// Frees memory for the given Func
#[allow(clippy::cast_ptr_alignment)]
#[no_mangle]
pub extern "C" fn wasmer_func_destroy(func: *mut wasmer_func_t) {
pub extern "C" fn wasmer_import_func_destroy(func: *mut wasmer_import_func_t) {
if !func.is_null() {
drop(unsafe { Box::from_raw(func as *mut Export) });
}
}
/// Gets func from wasm_export
/// Gets export func from export
#[no_mangle]
#[allow(clippy::cast_ptr_alignment)]
pub unsafe extern "C" fn wasmer_export_to_func(
export: *mut wasmer_export_t,
) -> *const wasmer_func_t {
let named_export = &*(export as *mut NamedExport);
&named_export.export as *const Export as *const wasmer_func_t
) -> *const wasmer_export_func_t {
export as *const wasmer_export_func_t
}
/// Gets name from wasmer_export
@ -878,8 +991,8 @@ pub unsafe extern "C" fn wasmer_export_name(export: *mut wasmer_export_t) -> was
/// and `wasmer_last_error_message` to get an error message.
#[allow(clippy::cast_ptr_alignment)]
#[no_mangle]
pub unsafe extern "C" fn wasmer_func_call(
func: *mut wasmer_func_t,
pub unsafe extern "C" fn wasmer_export_func_call(
func: *mut wasmer_export_func_t,
params: *const wasmer_value_t,
params_len: c_int,
results: *mut wasmer_value_t,
@ -901,46 +1014,42 @@ pub unsafe extern "C" fn wasmer_func_call(
let params: &[wasmer_value_t] = slice::from_raw_parts(params, params_len as usize);
let params: Vec<Value> = params.iter().cloned().map(|x| x.into()).collect();
let export_func = unsafe { &*(func as *mut Export) };
let named_export = unsafe { &*(func as *mut NamedExport) };
let results: &mut [wasmer_value_t] = slice::from_raw_parts_mut(results, results_len as usize);
// TODO implement func.call
update_last_error(CApiError {
msg: "wasmer_func_call not yet implemented".to_string(),
});
wasmer_result_t::WASMER_ERROR
// let result = instance.call(func_name_r, &params[..]);
// Box::into_raw(export_func);
// match result {
// Ok(results_vec) => {
// if results_vec.len() > 0 {
// let ret = match results_vec[0] {
// Value::I32(x) => wasmer_value_t {
// tag: wasmer_value_tag::WASM_I32,
// value: wasmer_value { I32: x },
// },
// Value::I64(x) => wasmer_value_t {
// tag: wasmer_value_tag::WASM_I64,
// value: wasmer_value { I64: x },
// },
// Value::F32(x) => wasmer_value_t {
// tag: wasmer_value_tag::WASM_F32,
// value: wasmer_value { F32: x },
// },
// Value::F64(x) => wasmer_value_t {
// tag: wasmer_value_tag::WASM_F64,
// value: wasmer_value { F64: x },
// },
// };
// results[0] = ret;
// }
// wasmer_result_t::WASMER_OK
// }
// Err(err) => {
// update_last_error(err);
// wasmer_result_t::WASMER_ERROR
// }
// }
let instance = &*named_export.instance;
let result = instance.call(&named_export.name, &params[..]);
match result {
Ok(results_vec) => {
if results_vec.len() > 0 {
let ret = match results_vec[0] {
Value::I32(x) => wasmer_value_t {
tag: wasmer_value_tag::WASM_I32,
value: wasmer_value { I32: x },
},
Value::I64(x) => wasmer_value_t {
tag: wasmer_value_tag::WASM_I64,
value: wasmer_value { I64: x },
},
Value::F32(x) => wasmer_value_t {
tag: wasmer_value_tag::WASM_F32,
value: wasmer_value { F32: x },
},
Value::F64(x) => wasmer_value_t {
tag: wasmer_value_tag::WASM_F64,
value: wasmer_value { F64: x },
},
};
results[0] = ret;
}
wasmer_result_t::WASMER_OK
}
Err(err) => {
update_last_error(err);
wasmer_result_t::WASMER_ERROR
}
}
}
/// Gets the memory within the context at the index `memory_idx`.
@ -1058,12 +1167,6 @@ impl From<wasmer_value_tag> for Type {
}
}
impl From<(std::string::String, wasmer_runtime_core::export::Export)> for NamedExport {
fn from((name, export): (String, Export)) -> Self {
NamedExport { name, export }
}
}
impl From<&wasmer_runtime::wasm::Type> for wasmer_value_tag {
fn from(ty: &Type) -> Self {
match *ty {
@ -1172,4 +1275,5 @@ impl Error for CApiError {}
struct NamedExport {
name: String,
export: Export,
instance: *mut Instance,
}