| // Copyright 2024 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package main | |
| import ( | |
| "fmt" | |
| "io" | |
| ) | |
| // Wasm page size. | |
| const pageSize = 64 * 1024 | |
| // Expect less than 3 MB + 1 page of memory usage for a small wasm | |
| // program. This reflects the current allocator. If the allocator | |
| // changes, update this value. | |
| const want = 3<<20 + pageSize | |
| var w = io.Discard | |
| func main() { | |
| fmt.Fprintln(w, "hello world") | |
| sz := uintptr(currentMemory()) * pageSize | |
| if sz > want { | |
| fmt.Printf("FAIL: unexpected memory size %d, want <= %d\n", sz, want) | |
| } | |
| } | |
| func currentMemory() int32 // implemented in assembly | |