From ea4c34fc0bf4f5249c72aa237105c3a2f8b44a98 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Tue, 21 Apr 2026 00:25:56 +0300
Subject: [PATCH] LibC: Fix printf thread safety

I don't know why I was using a static buffer for value conversions :D
---
 userspace/libraries/LibC/printf_impl.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/userspace/libraries/LibC/printf_impl.cpp b/userspace/libraries/LibC/printf_impl.cpp
index e866313a..ac5f41b0 100644
--- a/userspace/libraries/LibC/printf_impl.cpp
+++ b/userspace/libraries/LibC/printf_impl.cpp
@@ -274,6 +274,8 @@ static void floating_point_to_maybe_exponent_string(char* buffer, T value, bool
 
 extern "C" int printf_impl(const char* format, va_list arguments, int (*putc_fun)(int, void*), void* data)
 {
+	char conversion[4096];
+
 	int written = 0;
 	while (*format)
 	{
@@ -383,9 +385,6 @@ extern "C" int printf_impl(const char* format, va_list arguments, int (*putc_fun
 				format--;
 			format++;
 
-			// FIXME: this should be thread-local to keep
-			//        satisfy multithreaded requirement
-			static char conversion[4096];
 			const char* string = nullptr;
 
 			int length = -1;