main.go

     1  // Copyright 2024 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package main
     6  
     7  import (
     8  	"fmt"
     9  	"io"
    10  )
    11  
    12  // Expect 8 MB of memory usage for a small wasm program.
    13  // This reflects the current allocator. We test an exact
    14  // value here, but if the allocator changes, we can update
    15  // or relax this.
    16  const want = 8 << 20
    17  
    18  var w = io.Discard
    19  
    20  func main() {
    21  	fmt.Fprintln(w, "hello world")
    22  
    23  	const pageSize = 64 * 1024
    24  	sz := uintptr(currentMemory()) * pageSize
    25  	if sz != want {
    26  		fmt.Printf("FAIL: unexpected memory size %d, want %d\n", sz, want)
    27  	}
    28  }
    29  
    30  func currentMemory() int32 // implemented in assembly
    31
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