diff options
Diffstat (limited to 'src/runtime/cgo/gcc_stack_unix.c')
-rw-r--r-- | src/runtime/cgo/gcc_stack_unix.c | 40 |
1 files changed, 40 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 0000000..f3fead9 --- /dev/null +++ b/src/runtime/cgo/gcc_stack_unix.c @@ -0,0 +1,40 @@ +// 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(uintptr bounds[2]) +{ + pthread_attr_t attr; + void *addr; + size_t size; + +#if defined(__GLIBC__) || (defined(__sun) && !defined(__illumos__)) + // pthread_getattr_np is a GNU extension supported in glibc. + // Solaris is not glibc but does support pthread_getattr_np + // (and the fallback doesn't work...). Illumos does not. + pthread_getattr_np(pthread_self(), &attr); // GNU extension + pthread_attr_getstack(&attr, &addr, &size); // low address +#elif defined(__illumos__) + pthread_attr_init(&attr); + pthread_attr_get_np(pthread_self(), &attr); + pthread_attr_getstack(&attr, &addr, &size); // low address +#else + pthread_attr_init(&attr); + pthread_attr_getstacksize(&attr, &size); + addr = __builtin_frame_address(0) + 4096 - size; +#endif + pthread_attr_destroy(&attr); + + bounds[0] = (uintptr)addr; + bounds[1] = (uintptr)addr + size; +} |