1 files changed, 32 insertions, 0 deletions
diff --git a/src/runtime/cgo/gcc_stack_unix.c b/src/runtime/cgo/gcc_stack_unix.c
new file mode 100644
index 0000000000..3826322661
--- /dev/null
+++ b/src/runtime/cgo/gcc_stack_unix.c
@@ -0,0 +1,32 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build unix && !darwin
+
+#ifndef _GNU_SOURCE // pthread_getattr_np
+#define _GNU_SOURCE
+#endif
+
+#include <pthread.h>
+#include "libcgo.h"
+
+void
+x_cgo_getstackbound(G *g)
+{
+	pthread_attr_t attr;
+	void *addr;
+	size_t size;
+
+	pthread_attr_init(&attr);
+#if defined(__GLIBC__) || defined(__sun)
+	pthread_getattr_np(pthread_self(), &attr);  // GNU extension
+	pthread_attr_getstack(&attr, &addr, &size); // low address
+#else
+	pthread_attr_getstacksize(&attr, &size);
+	addr = __builtin_frame_address(0) + 4096 - size;
+#endif
+	g->stacklo = (uintptr)addr;
+	// NOTE: don't change g->stackhi. We are called from asmcgocall
+	// which saves the stack depth based on g->stackhi.
+}