From ec3464ca6c2e0886ac032f85d1cb6f9df86d4828 Mon Sep 17 00:00:00 2001
From: Meghan Denny <meghan@bun.sh>
Date: Fri, 22 Nov 2024 01:37:06 -0800
Subject: [PATCH] dont sigaltstack when about to use WTFReportBacktrace

---
 src/crash_handler.zig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/crash_handler.zig b/src/crash_handler.zig
index 1bae80ccc4..7c8f41bc69 100644
--- a/src/crash_handler.zig
+++ b/src/crash_handler.zig
@@ -754,7 +754,9 @@ fn handleSegfaultPosix(sig: i32, info: *const std.posix.siginfo_t, _: ?*const an
     );
 }
 
-var did_register_sigaltstack = false;
+// skip in canary since we let WTFReportBacktrace print trace
+// this will make stack overflow have a slightly worse ux but its rare enough to be worth it and still unique enough to be diagnosable
+var did_register_sigaltstack = bun.Environment.isRelease and bun.Environment.is_canary;
 var sigaltstack: [512 * 1024]u8 = undefined;
 
 pub fn updatePosixSegfaultHandler(act: ?*std.posix.Sigaction) !void {