blob: 98a75a19679547c4fceffea833311535299ddba1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
// 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;
// Needed before pthread_getattr_np, too, since before glibc 2.32
// it did not call pthread_attr_init in all cases (see #65625).
pthread_attr_init(&attr);
#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_get_np(pthread_self(), &attr);
pthread_attr_getstack(&attr, &addr, &size); // low address
#else
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;
}
|
