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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Thu, 16 Nov 2023 16:48:10 +0100
Subject: feat: optionally prevent calling V8::EnableWebAssemblyTrapHandler
V8::EnableWebAssemblyTrapHandler can be called only once or it will
hard crash. We need to prevent Node.js calling it in the event it has
already been called.
This should be upstreamed.
diff --git a/src/node.cc b/src/node.cc
index 012dd487e8db232d068bce358ad44b14e78d0fe9..a1062226bebd18ec84302ebdc4c4dbac352f51ae 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -650,6 +650,7 @@ static void PlatformInit(ProcessInitializationFlags::Flags flags) {
#endif
}
#endif // defined(_WIN32)
+ if (!(flags & ProcessInitializationFlags::kNoEnableWasmTrapHandler))
V8::EnableWebAssemblyTrapHandler(false);
#endif // NODE_USE_V8_WASM_TRAP_HANDLER
diff --git a/src/node.h b/src/node.h
index 16c3ad349e942b83764c7772178baa5057cd64f3..5ade64874ec08474f05db226cf19a043fa26592e 100644
--- a/src/node.h
+++ b/src/node.h
@@ -275,6 +275,10 @@ enum Flags : uint32_t {
kNoInitializeCppgc = 1 << 13,
// Initialize the process for predictable snapshot generation.
kGeneratePredictableSnapshot = 1 << 14,
+ // Do not initialize the Web Assembly trap handler. This is used by
+ // embedders to account for the case where it may already have been
+ // initialized - calling it more than once will hard crash.
+ kNoEnableWasmTrapHandler = 1 << 15,
// Emulate the behavior of InitializeNodeWithArgs() when passing
// a flags argument to the InitializeOncePerProcess() replacement
