From 47259c497b3fadc2afe1fe7cedbbb165736f2465 Mon Sep 17 00:00:00 2001
From: chai2010 <chaishushan@gmail.com>
Date: Sat, 3 Sep 2022 23:22:30 +0800
Subject: [PATCH] =?UTF-8?q?wasm=20=E5=91=BD=E4=BB=A4=E8=A1=8C=E5=A2=9E?=
 =?UTF-8?q?=E5=8A=A0=20run=20=E6=89=A7=E8=A1=8C=E5=8F=82=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 go.mod                        |  5 ++++-
 go.sum                        |  2 ++
 internal/app/wabt_wat2wasm.go | 41 ++++++++++++++++++++++++++++++++++-
 3 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/go.mod b/go.mod
index f493bab..4149181 100644
--- a/go.mod
+++ b/go.mod
@@ -4,4 +4,7 @@ module github.com/wa-lang/wa
 
 go 1.17
 
-require github.com/wa-lang/wabt-go v1.1.0 // indirect
+require (
+	github.com/tetratelabs/wazero v1.0.0-pre.1 // indirect
+	github.com/wa-lang/wabt-go v1.1.0 // indirect
+)
diff --git a/go.sum b/go.sum
index 4b2b33e..f77e863 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,4 @@
+github.com/tetratelabs/wazero v1.0.0-pre.1 h1:bUZ4vf21c36RmgA3enNOlLgPElEVDYoRJJ9+McRGF6Q=
+github.com/tetratelabs/wazero v1.0.0-pre.1/go.mod h1:M8UDNECGm/HVjOfq0EOe4QfCY9Les1eq54IChMLETbc=
 github.com/wa-lang/wabt-go v1.1.0 h1:0ois7H69M+6lJhjqU/3c5HxTGeQjwTW0Ncj+SLEW96o=
 github.com/wa-lang/wabt-go v1.1.0/go.mod h1:I/qIi3rHMN4ECgmZ8FzYwpNr2KfLs4TiXuTi7Ql7H3g=
diff --git a/internal/app/wabt_wat2wasm.go b/internal/app/wabt_wat2wasm.go
index 5651773..f1a5c3d 100644
--- a/internal/app/wabt_wat2wasm.go
+++ b/internal/app/wabt_wat2wasm.go
@@ -3,6 +3,7 @@
 package app
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"os"
@@ -11,6 +12,10 @@ import (
 	"runtime"
 	"strings"
 
+	"github.com/tetratelabs/wazero"
+	"github.com/tetratelabs/wazero/api"
+	"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
+
 	"github.com/wa-lang/wa/internal/config"
 	"github.com/wa-lang/wa/internal/logger"
 	"github.com/wa-lang/wabt-go"
@@ -27,7 +32,41 @@ func RunWasm(filename string) (stdoutStderr []byte, err error) {
 		}
 	}
 
-	return nil, fmt.Errorf("TODO: run wasm")
+	wasmBytes, err := os.ReadFile(dst)
+	if err != nil {
+		return nil, err
+	}
+
+	ctx := context.Background()
+	r := wazero.NewRuntimeWithConfig(ctx,
+		wazero.NewRuntimeConfig().WithWasmCore2(),
+	)
+	defer r.Close(ctx)
+
+	if false {
+		if _, err := wasi_snapshot_preview1.Instantiate(ctx, r); err != nil {
+			return nil, err
+		}
+	}
+	_, err = r.NewModuleBuilder("wasi_snapshot_preview1").
+		ExportFunction("fd_write", func(m api.Module, fd, iov, iov_len, p_nwritten uint32) uint32 {
+			pos, _ := m.Memory().ReadUint32Le(ctx, iov)
+			n, _ := m.Memory().ReadUint32Le(ctx, iov+4)
+			bytes, _ := m.Memory().Read(ctx, pos, n)
+			fmt.Print(string(bytes))
+			return 0
+		}).
+		Instantiate(ctx, r)
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = r.InstantiateModuleFromBinary(ctx, wasmBytes)
+	if err != nil {
+		return nil, err
+	}
+
+	return nil, nil
 }
 
 func InstallWat2wasm(path string) error {
-- 
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