From 14b827049aed9fbd33df84f3428b98f27a7b216e Mon Sep 17 00:00:00 2001
From: David CARLIER <devnexen@gmail.com>
Date: Fri, 29 Sep 2023 11:47:23 +0100
Subject: [PATCH] zend call stack support for haiku w/o using posix pthread api
 but the (#12103)

underlying native BeOs one.
---
 Zend/zend_call_stack.c | 33 +++++++++++++++++++++++++++++++++
 Zend/zend_call_stack.h |  3 +++
 2 files changed, 36 insertions(+)

diff --git a/Zend/zend_call_stack.c b/Zend/zend_call_stack.c
index 42db6b7e793..f869d1a4002 100644
--- a/Zend/zend_call_stack.c
+++ b/Zend/zend_call_stack.c
@@ -55,6 +55,9 @@ typedef int boolean_t;
 # include <sys/sysctl.h>
 # include <sys/syscall.h>
 #endif
+#ifdef __HAIKU__
+# include <kernel/OS.h>
+#endif
 #ifdef __linux__
 #include <sys/syscall.h>
 #endif
@@ -507,6 +510,32 @@ static bool zend_call_stack_get_openbsd(zend_call_stack *stack)
 	return false;
 }
 #endif /* defined(__OpenBSD__) */
+#if defined(__HAIKU__)
+static bool zend_call_stack_get_haiku(zend_call_stack *stack)
+{
+	thread_id id;
+	thread_info ti;
+	size_t guard_size;
+
+	// unlikely, main thread ought to be always available but we never know
+	if ((id = find_thread(NULL)) == B_NAME_NOT_FOUND || get_thread_info(id, &ti) != B_OK) {
+		return false;
+	}
+
+	// USER_STACK_GUARD_SIZE
+	guard_size = sysconf(_SC_PAGESIZE) * 4;
+
+	stack->base = ti.stack_end;
+	stack->max_size = ((size_t)ti.stack_end - (size_t)ti.stack_base) - guard_size;
+
+	return true;
+}
+#else
+static bool zend_call_stack_get_haiku(zend_call_stack *stack)
+{
+	return false;
+}
+#endif /* defined(__HAIKU__) */
 
 #if defined(__NetBSD__)
 # ifdef HAVE_PTHREAD_GETATTR_NP
@@ -648,6 +677,10 @@ ZEND_API bool zend_call_stack_get(zend_call_stack *stack)
 		return true;
 	}
 
+	if (zend_call_stack_get_haiku(stack)) {
+		return true;
+	}
+
 	return false;
 }
 
diff --git a/Zend/zend_call_stack.h b/Zend/zend_call_stack.h
index bdea17a4769..29f1a5463d1 100644
--- a/Zend/zend_call_stack.h
+++ b/Zend/zend_call_stack.h
@@ -86,6 +86,9 @@ static inline size_t zend_call_stack_default_size(void)
 	}
 	return 512 * 1024;
 #endif
+#ifdef __HAIKU__
+	return 64 * 4096;
+#endif
 
 	return 2 * 1024 * 1024;
 }