From 95ecb7e4d440605165a74de607de5389508779be Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Mon, 31 Oct 2022 09:52:13 -0500
Subject: [PATCH] Add a CLI option for the maximum stack size (#5156)

This should allow either increasing or decreasing it for debugging and
otherwise prodding at stack overflow behavior from the CLI.
---
 crates/cli-flags/src/lib.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/crates/cli-flags/src/lib.rs b/crates/cli-flags/src/lib.rs
index 058522bbb9..e4066edb9d 100644
--- a/crates/cli-flags/src/lib.rs
+++ b/crates/cli-flags/src/lib.rs
@@ -229,6 +229,11 @@ pub struct CommonOptions {
     #[cfg(feature = "pooling-allocator")]
     #[clap(long)]
     pub pooling_allocator: bool,
+
+    /// Maximum stack size, in bytes, that wasm is allowed to consumed before a
+    /// stack overflow is reported.
+    #[clap(long)]
+    pub max_wasm_stack: Option<usize>,
 }
 
 impl CommonOptions {
@@ -335,6 +340,10 @@ impl CommonOptions {
             }
         }
 
+        if let Some(max) = self.max_wasm_stack {
+            config.max_wasm_stack(max);
+        }
+
         Ok(config)
     }