Source file
src/runtime/mem_aix.go
1
2
3
4
5 package runtime
6
7 import (
8 "unsafe"
9 )
10
11
12
13
14
15 func sysAllocOS(n uintptr) unsafe.Pointer {
16 p, err := mmap(nil, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_PRIVATE, -1, 0)
17 if err != 0 {
18 if err == _EACCES {
19 print("runtime: mmap: access denied\n")
20 exit(2)
21 }
22 if err == _EAGAIN {
23 print("runtime: mmap: too much locked memory (check 'ulimit -l').\n")
24 exit(2)
25 }
26 return nil
27 }
28 return p
29 }
30
31 func sysUnusedOS(v unsafe.Pointer, n uintptr) {
32 madvise(v, n, _MADV_DONTNEED)
33 }
34
35 func sysUsedOS(v unsafe.Pointer, n uintptr) {
36 }
37
38 func sysHugePageOS(v unsafe.Pointer, n uintptr) {
39 }
40
41
42
43
44
45 func sysFreeOS(v unsafe.Pointer, n uintptr) {
46 munmap(v, n)
47 }
48
49 func sysFaultOS(v unsafe.Pointer, n uintptr) {
50 mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE|_MAP_FIXED, -1, 0)
51 }
52
53 func sysReserveOS(v unsafe.Pointer, n uintptr) unsafe.Pointer {
54 p, err := mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE, -1, 0)
55 if err != 0 {
56 return nil
57 }
58 return p
59 }
60
61 func sysMapOS(v unsafe.Pointer, n uintptr) {
62
63
64
65
66
67 _, err := mprotect(v, n, _PROT_READ|_PROT_WRITE)
68 if err == _ENOMEM {
69 throw("runtime: out of memory")
70 }
71 if err != 0 {
72 print("runtime: mprotect(", v, ", ", n, ") returned ", err, "\n")
73 throw("runtime: cannot map pages in arena address space")
74 }
75 }
76
View as plain text