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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
| use quote::quote; | ||
| use std::{fs::File, io::Read}; | ||
| use syn::parse::{Parse, ParseStream, Result}; | ||
| use syn::LitStr; | ||
|
|
||
| use std::path::PathBuf; | ||
|
|
||
| struct ImportModule { | ||
| importing_file: LitStr, | ||
| } | ||
|
|
||
| impl Parse for ImportModule { | ||
| fn parse(input: ParseStream) -> Result<Self> { | ||
| let importing_file: LitStr = input.parse()?; | ||
| Ok(ImportModule { importing_file }) | ||
| } | ||
| } | ||
|
|
||
| pub fn macro_impl(input: proc_macro::TokenStream) -> proc_macro::TokenStream { | ||
| let import_module_args = syn::parse_macro_input!(input as ImportModule); | ||
|
|
||
| let manifest = | ||
| std::env::var("CARGO_MANIFEST_DIR").expect("variable should always be set by Cargo."); | ||
|
|
||
| let mut path = PathBuf::new(); | ||
| path.push(manifest); | ||
| path = path.join(import_module_args.importing_file.value()); | ||
|
|
||
| let mut fd = File::open(&path) | ||
| .unwrap_or_else(|_| panic!("Unable to find TVM object file at `{}`", path.display())); | ||
| let mut buffer = Vec::new(); | ||
| fd.read_to_end(&mut buffer).unwrap(); | ||
|
|
||
| let fn_names = match goblin::Object::parse(&buffer).unwrap() { | ||
| goblin::Object::Elf(elf) => elf | ||
| .syms | ||
| .iter() | ||
| .filter_map(|s| { | ||
| if s.st_type() == 0 || goblin::elf::sym::type_to_str(s.st_type()) == "FILE" { | ||
| return None; | ||
| } | ||
| match elf.strtab.get(s.st_name) { | ||
| Some(Ok(name)) if name != "" => { | ||
| Some(syn::Ident::new(name, proc_macro2::Span::call_site())) | ||
| } | ||
| _ => None, | ||
| } | ||
| }) | ||
| .collect::<Vec<_>>(), | ||
| goblin::Object::Mach(goblin::mach::Mach::Binary(obj)) => { | ||
| obj.symbols() | ||
| .filter_map(|s| match s { | ||
| Ok((name, ref nlist)) | ||
| if nlist.is_global() | ||
| && nlist.n_sect != 0 | ||
| && !name.ends_with("tvm_module_ctx") => | ||
| { | ||
| Some(syn::Ident::new( | ||
| if name.starts_with('_') { | ||
| // Mach objects prepend a _ to globals. | ||
| &name[1..] | ||
| } else { | ||
| &name | ||
| }, | ||
| proc_macro2::Span::call_site(), | ||
| )) | ||
| } | ||
| _ => None, | ||
| }) | ||
| .collect::<Vec<_>>() | ||
| } | ||
| _ => panic!("Unsupported object format."), | ||
| }; | ||
|
|
||
| let extern_fns = quote! { | ||
| mod ext { | ||
| extern "C" { | ||
| #( | ||
| pub(super) fn #fn_names( | ||
| args: *const tvm_runtime::ffi::TVMValue, | ||
| type_codes: *const std::os::raw::c_int, | ||
| num_args: std::os::raw::c_int | ||
| ) -> std::os::raw::c_int; | ||
| )* | ||
| } | ||
| } | ||
| }; | ||
|
|
||
| let fns = quote! { | ||
| use tvm_runtime::{ffi::TVMValue, ArgValue, RetValue, FuncCallError}; | ||
| #extern_fns | ||
|
|
||
| #( | ||
| pub fn #fn_names(args: &[ArgValue]) -> Result<RetValue, FuncCallError> { | ||
| let (values, type_codes): (Vec<TVMValue>, Vec<i32>) = args | ||
| .into_iter() | ||
| .map(|arg| { | ||
| let (val, code) = arg.to_tvm_value(); | ||
| (val, code as i32) | ||
| }) | ||
| .unzip(); | ||
| let exit_code = unsafe { | ||
| ext::#fn_names(values.as_ptr(), type_codes.as_ptr(), values.len() as i32) | ||
| }; | ||
| if exit_code == 0 { | ||
| Ok(RetValue::default()) | ||
| } else { | ||
| Err(FuncCallError::get_with_context(stringify!(#fn_names).to_string())) | ||
| } | ||
| } | ||
| )* | ||
| }; | ||
|
|
||
| proc_macro::TokenStream::from(fns) | ||
| } |
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