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doc,lib,src: throw on missing WebAssembly or RX support by ShogunPanda · Pull Request #66533 · nodejs/node · GitHub
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doc,lib,src: throw on missing WebAssembly or RX support #66533

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nodejs-github-bot merged 3 commits into from
Oct 10, 2026
Merged

doc,lib,src: throw on missing WebAssembly or RX support #66533

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3afc022
doc,lib,src: throw on missing WebAssembly or RX support
ShogunPanda Oct 5, 2026
0484eca
fixup
ShogunPanda Oct 6, 2026
2b63e8c
fixup
ShogunPanda Oct 7, 2026
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fixup 
Signed-off-by: Paolo Insogna <paolo@cowtech.it>
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@ShogunPanda
ShogunPanda committed Oct 6, 2026
commit 0484eca87d19c551fb0c087aae3b632cc5a8c4a3
8 changes: 8 additions & 0 deletions doc/node.1
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Expand Up @@ -1179,6 +1179,14 @@ Opens the REPL even if stdin does not appear to be a terminal.
Disable runtime allocation of executable memory. This may be
required on some platforms for security reasons. It can also reduce attack
surface on other platforms, but the performance impact may be severe.
When WebAssembly is unavailable in this mode, TypeScript parsing and WebAssembly
module imports throw \fBERR_WEBASSEMBLY_NOT_SUPPORTED\fR. Node.js does not
guarantee alternative implementations of features that require WebAssembly or
runtime allocation of executable memory when those capabilities are unavailable.
This flag controls V8's runtime code generation. It does not impose an
operating-system restriction on executable memory allocated by native addons or
\fBnode:ffi\fR. FFI operations that require unavailable executable memory can
throw \fBERR_RX_MEMORY_NOT_SUPPORTED\fR.
.
.It Fl -localstorage-file Ns = Ns Ar file
The file used to store \fBlocalStorage\fR data. If the file does not exist, it is
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2 changes: 1 addition & 1 deletion src/node_errors.h
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Expand Up @@ -125,7 +125,7 @@ void OOMErrorHandler(const char* location, const v8::OOMDetails& details);
V(ERR_OPERATION_FAILED, TypeError) \
V(ERR_OPTIONS_BEFORE_BOOTSTRAPPING, Error) \
V(ERR_OUT_OF_RANGE, RangeError) \
V(ERR_RX_MEMORY_NOT_SUPPORTED, Error) \
V(ERR_RX_MEMORY_NOT_SUPPORTED, Error) \
V(ERR_SCRIPT_EXECUTION_INTERRUPTED, Error) \
V(ERR_SCRIPT_EXECUTION_TIMEOUT, Error) \
V(ERR_SOURCE_PHASE_NOT_DEFINED, SyntaxError) \
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6 changes: 1 addition & 5 deletions test/es-module/test-esm-wasm-jitless.mjs
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@@ -1,12 +1,8 @@
// Flags: --jitless
import { skip } from '../common/index.mjs';
import '../common/index.mjs';
import assert from 'node:assert/strict';
import * as fixtures from '../common/fixtures.mjs';

if (typeof WebAssembly !== 'undefined') {
skip('WebAssembly is available in jitless mode');
}

const url = fixtures.fileURL('es-modules/simple.wasm').href;
const error = {
code: 'ERR_WEBASSEMBLY_NOT_SUPPORTED',
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