| // 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 |
