{"id":2315,"date":"2020-11-19T22:56:47","date_gmt":"2020-11-19T13:56:47","guid":{"rendered":"https:\/\/mattyan.net\/blog\/?p=2315"},"modified":"2020-11-19T22:56:47","modified_gmt":"2020-11-19T13:56:47","slug":"rust%e3%81%a7wasm%e3%82%92%e5%ae%9f%e8%a1%8c%e3%81%97%e3%81%a6%e3%81%bf%e3%81%9f2","status":"publish","type":"post","link":"https:\/\/mattyan.net\/blog\/?p=2315","title":{"rendered":"rust\u3067wasm\u3092\u5b9f\u884c\u3057\u3066\u307f\u305f(2)"},"content":{"rendered":"

wasm\u5358\u4f53\u3060\u3068\u3067\u304d\u306a\u3044\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3001wasi-libc<\/a>\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u307f\u305f\u3002
\n
\n\u307e\u305a\u3001github\u304b\u3089wasi-libc\u3092clone\u3002\u4e2d\u306b\u5165\u3063\u3066make\u3059\u308b\u3082\u3001\u300cdiff\u304c\u7121\u3044\u300d\u3068\u3044\u3063\u305f\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u304d\u305f\u306e\u3067\u3001msys2\u74b0\u5883\u306bdiff\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3002
\n\u6b21\u306bmsys2\u306ebash\u304b\u3089\u3060\u3068Windows\u306ePATH\u304c(\u4f55\u6545\u304b)\u898b\u3048\u306a\u3044\u306e\u3067\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u30d1\u30b9\u3092\u76f4\u63a5\u6307\u5b9a\u3057\u3066make<\/p>\n

make WASM_CC=\/d\/Scoop\/apps\/llvm\/current\/bin\/clang.exe WASM_AR=\/d\/Scoop\/apps\/llvm\/current\/bin\/llvm-ar.exe WASM_NM=\/d\/Scoop\/apps\/llvm\/current\/bin\/llvm-nm.exe<\/pre>\n
\u3067\u30d3\u30eb\u30c9\u3001libclang_rt.builtins-wasm32.a\u304c\u7121\u3044\u3068\u8a00\u308f\u308c\u305f\u306e\u3067\u3001 jedisct1\/libclang_rt.builtins-wasm32.a<\/a>\u304b\u3089\u62fe\u3063\u3066\u304d\u3066\u30b3\u30d4\u30fc\u3002
\nc\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067printf\u3067\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u3088\u3046\u306b\u6539\u9020<\/p>\n
#include <stdint.h>\n#include <stdio.h>\n__attribute__((visibility("default")))\nint add(int32_t a, int32_t b) {\n    printf("hello wasi\\n");\n    return a + b;\n}\nint main() {return 0;}\n<\/code><\/pre>\n
int main()\u304c\u306a\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u6012\u3089\u308c\u308b\u306e\u3067\u3001\u4f55\u3082\u3057\u306a\u3044\u95a2\u6570\u3092\u8ffd\u52a0\u3002<\/p>\n
all: wasm.wasm\nwasm.wasm: wasm.o\n\tclang --sysroot=D:\/build\/wasi-libc\/sysroot -L D:\/build\/wasi-libc\/sysroot\/lib\/wasm32-wasi -Wl,--no-entry -Wl,--export-dynamic --target=wasm32-wasi -o wasm.wasm wasm.o\nwasm.o: wasm.c\n\tclang --sysroot=D:\/build\/wasi-libc\/sysroot --target=wasm32-wasi -c wasm.c -o wasm.o<\/code><\/pre>\n
makefile\u3082\u4fee\u6b63\u3002\u30d3\u30eb\u30c9\u3057\u305fwasi-libc\u3092\u4f7f\u3046\u3088\u3046\u306b\u3057\u305f\u3002
\n\u3055\u3089\u306brust\u5074\u3082\u4fee\u6b63\u3002wasmer-wasi\u3092dependencies\u306b\u8ffd\u52a0\u3057\u305f\u4e0a\u3067<\/p>\n
extern crate wasmer;\nuse wasmer::{Store, Module, Instance, Value};\nuse wasmer_wasi::WasiState;\nfn main() {\n    \/\/ wasm\u30d5\u30a1\u30a4\u30eb\u5b9f\u884c\u6e96\u5099\n    let store = Store::default();\n    let module = Module::from_file(&store, "wasm.wasm").unwrap();\n    let mut wasi_env = WasiState::new("wasi.wasi").finalize().unwrap();\n    let import_object = wasi_env.import_object(&module).unwrap();\n    let instance = Instance::new(&module, &import_object).unwrap();\n    wasi_env.set_memory(instance.exports.get_memory("memory").unwrap().clone());\n    let add = instance.exports.get_function("add").unwrap();\n    \/\/ wasm\u306e\u95a2\u6570\u5b9f\u884c\n    let response = add.call(&[Value::I32(1), Value::I32(2)]).unwrap();\n    println!("1 + 2 = {}", response[0].to_string().parse::<i32>().unwrap());\n}\n<\/code><\/pre>\n
wasmer-wasi\u3092\u4f7f\u3063\u3066wasi\u7528\u306eimport_object\u3092\u4f5c\u308b\u3088\u3046\u306b\u4fee\u6b63\u3002\u3042\u3068\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u3082\u4fee\u6b63\u3057\u3066module\u306e\u4f5c\u308a\u65b9\u3092\u5909\u66f4\u3002
\n\u5b9f\u884c\u7d50\u679c\u306f<\/p>\n
\nPS wasm_rt> cargo run\n   Compiling wasm_rt v0.1.0 (wasm_rt)\n    Finished dev [unoptimized + debuginfo] target(s) in 5.96s\n     Running `target\\debug\\wasm_rt.exe`\nhello wasi\n1 + 2 = 3\n<\/pre>\n
\u3069\u3046\u3084\u3089wasm\u306eprintf\u304c\u52d5\u3044\u305f\u3088\u3046\u3060\u3002
\n\u3053\u308c\u3001\u4ed6\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3082–target\u6307\u5b9a\u3057\u3066static\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u3057\u305f\u3082\u306e\u3092\u30ea\u30f3\u30af\u3059\u308c\u3070\u52d5\u304f\u306e\u304b\u306a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
wasm\u5358\u4f53\u3060\u3068\u3067\u304d\u306a\u3044\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3001wasi-libc\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u307f\u305f\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2315","post","type-post","status-publish","format-standard","hentry","category-3"],"_links":{"self":[{"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2315","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2315"}],"version-history":[{"count":0,"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2315\/revisions"}],"wp:attachment":[{"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mattyan.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}