From c42e949f5bc652c9894b67bdacbfb4d03ce5091c Mon Sep 17 00:00:00 2001
From: nipos <ni.pos@yandex.com>
Date: Sun, 19 Feb 2023 10:24:05 +0100
Subject: [PATCH] AK/StackInfo: Add support for OpenBSD pthreads

---
 AK/StackInfo.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/AK/StackInfo.cpp b/AK/StackInfo.cpp
index 80e1d4271c..9b92e471d8 100644
--- a/AK/StackInfo.cpp
+++ b/AK/StackInfo.cpp
@@ -14,7 +14,7 @@
 #    include <serenity.h>
 #elif defined(AK_OS_LINUX) or defined(AK_OS_MACOS)
 #    include <pthread.h>
-#elif defined(AK_OS_FREEBSD)
+#elif defined(AK_OS_FREEBSD) or defined(AK_OS_OPENBSD)
 #    include <pthread.h>
 #    include <pthread_np.h>
 #endif
@@ -67,6 +67,16 @@ StackInfo::StackInfo()
         m_size = eight_megabytes;
     }
     m_base = top_of_stack - m_size;
+#elif defined(AK_OS_OPENBSD)
+    int rc;
+    stack_t thread_stack;
+    if ((rc = pthread_stackseg_np(pthread_self(), &thread_stack)) != 0) {
+        fprintf(stderr, "pthread_stackseg_np: %s\n", strerror(rc));
+        VERIFY_NOT_REACHED();
+    }
+    FlatPtr top_of_stack = (FlatPtr)thread_stack.ss_sp;
+    m_size = (size_t)thread_stack.ss_size;
+    m_base = top_of_stack - m_size;
 #else
 #    pragma message "StackInfo not supported on this platform! Recursion checks and stack scans may not work properly"
     m_size = (size_t)~0;