From bf273b7aec8fe9957967c635bd01b2b92909b192 Mon Sep 17 00:00:00 2001
From: zigazeljko <ziga.zeljko@gmail.com>
Date: Wed, 3 Jun 2020 01:58:30 +0800
Subject: [PATCH] Add comment explaining --stack-first option

---
 src/link.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/link.cpp b/src/link.cpp
index 80baffe51c..b54fdf6b93 100644
--- a/src/link.cpp
+++ b/src/link.cpp
@@ -2107,6 +2107,10 @@ static void construct_linker_job_wasm(LinkJob *lj) {
     lj->args.append("-z");
     lj->args.append(buf_ptr(buf_sprintf("stack-size=%" ZIG_PRI_usize, stack_size)));
 
+    // put stack before globals so that stack overflow results in segfault immediately before corrupting globals
+    // see https://github.com/ziglang/zig/issues/4496
+    lj->args.append("--stack-first");
+
     if (g->out_type != OutTypeExe) {
         lj->args.append("--no-entry"); // So lld doesn't look for _start.