1 files changed, 44 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/wasm/code-space-overflow.js b/deps/v8/test/mjsunit/wasm/code-space-overflow.js
new file mode 100644
index 0000000000..d95948efb8
--- /dev/null
+++ b/deps/v8/test/mjsunit/wasm/code-space-overflow.js
@@ -0,0 +1,44 @@
+// Copyright 2022 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --wasm-max-code-space-size-mb=1
+// Disable lazy compilation, so we actually generate a lot of code at once.
+// Flags: --no-wasm-lazy-compilation
+// Limit the number of background threads, so each thread generates more code.
+// Flags: --wasm-num-compilation-tasks=2
+
+// This is a regression test for https://crbug.com/v8/13436. If a single
+// background thread generates more code than fits in a single code space, we
+// need to split it into multiple code spaces.
+
+d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
+
+const start = performance.now();
+function time(name) {
+  const ms_since_start = (performance.now() - start).toFixed(1).padStart(7);
+  print(`[${ms_since_start}] ${name}`);
+}
+
+// At the time of writing this test (Nov 2022), this module generated ~20MB of
+// code on x64 and ~18MB on arm64.
+const builder = new WasmModuleBuilder();
+const kNumFunctions = 1500;
+// Build a large body. Then append one instruction to get different code per
+// function (for the case that we decide to merge identical code objects in the
+// future).
+time('Build function template.');
+let body_template = [kExprLocalGet, 0];
+for (let i = 0; i < kNumFunctions; ++i) {
+  body_template.push(kExprCallFunction, ...wasmSignedLeb(i));
+}
+time(`Adding ${kNumFunctions} functions`);
+for (let i = 0; i < kNumFunctions; ++i) {
+  if (i != 0 && i % 100 == 0) time(`... added ${i} functions`);
+  let body = body_template.concat([...wasmI32Const(i), kExprI32Add, kExprEnd]);
+  builder.addFunction('f' + i, kSig_i_i).addBodyWithEnd(body);
+}
+time('Building buffer.');
+const wasm_buf = builder.toBuffer();
+time('Compiling Wasm module.');
+new WebAssembly.Module(wasm_buf);