1 // Copyright 2023 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 //go:build unix && !darwin
7 #ifndef _GNU_SOURCE // pthread_getattr_np
15 x_cgo_getstackbound(uintptr *low)
21 #if defined(__GLIBC__) || (defined(__sun) && !defined(__illumos__))
22 // pthread_getattr_np is a GNU extension supported in glibc.
23 // Solaris is not glibc but does support pthread_getattr_np
24 // (and the fallback doesn't work...). Illumos does not.
25 pthread_getattr_np(pthread_self(), &attr); // GNU extension
26 pthread_attr_getstack(&attr, &addr, &size); // low address
27 #elif defined(__illumos__)
28 pthread_attr_init(&attr);
29 pthread_attr_get_np(pthread_self(), &attr);
30 pthread_attr_getstack(&attr, &addr, &size); // low address
32 pthread_attr_init(&attr);
33 pthread_attr_getstacksize(&attr, &size);
34 addr = __builtin_frame_address(0) + 4096 - size;
36 pthread_attr_destroy(&attr);