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runtime: enable runtime_mmap_test.go on AIX

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AIX doesn't allow to mmap an address range which is already mmap.
Therefore, once the region has been allocated, it must munmap before
being able to play with it.

Change-Id: I1547782f0379024f57869f1dda8c1c9bb12d831f
Reviewed-on: https://go-review.googlesource.com/c/go/+/174059
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Clément Chigot 2019-04-26 16:40:01 +02:00 committed by Brad Fitzpatrick
parent 8feeada50c
commit f61353f2d9
5 changed files with 13 additions and 8 deletions
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2
src/runtime/defs_aix.go
View File

@ -65,7 +65,7 @@ const (
_PROT_WRITE = C.PROT_WRITE
_PROT_EXEC = C.PROT_EXEC
_MAP_ANONYMOUS = C.MAP_ANONYMOUS
_MAP_ANON = C.MAP_ANONYMOUS
_MAP_PRIVATE = C.MAP_PRIVATE
_MAP_FIXED = C.MAP_FIXED
_MADV_DONTNEED = C.MADV_DONTNEED

2
src/runtime/defs_aix_ppc64.go
View File

@ -22,7 +22,7 @@ const (
_PROT_WRITE = 0x2
_PROT_EXEC = 0x4
_MAP_ANONYMOUS = 0x10
_MAP_ANON = 0x10
_MAP_PRIVATE = 0x2
_MAP_FIXED = 0x100
_MADV_DONTNEED = 0x4

2
src/runtime/export_mmap_test.go
View File

@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
// +build aix darwin dragonfly freebsd linux nacl netbsd openbsd solaris
// Export guts for testing.

8
src/runtime/mem_aix.go
View File

@ -12,7 +12,7 @@ import (
// prevents us from allocating more stack.
//go:nosplit
func sysAlloc(n uintptr, sysStat *uint64) unsafe.Pointer {
p, err := mmap(nil, n, _PROT_READ|_PROT_WRITE, _MAP_ANONYMOUS|_MAP_PRIVATE, -1, 0)
p, err := mmap(nil, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_PRIVATE, -1, 0)
if err != 0 {
if err == _EACCES {
print("runtime: mmap: access denied\n")
@ -46,11 +46,11 @@ func sysFree(v unsafe.Pointer, n uintptr, sysStat *uint64) {
}
func sysFault(v unsafe.Pointer, n uintptr) {
mmap(v, n, _PROT_NONE, _MAP_ANONYMOUS|_MAP_PRIVATE|_MAP_FIXED, -1, 0)
mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE|_MAP_FIXED, -1, 0)
}
func sysReserve(v unsafe.Pointer, n uintptr) unsafe.Pointer {
p, err := mmap(v, n, _PROT_NONE, _MAP_ANONYMOUS|_MAP_PRIVATE, -1, 0)
p, err := mmap(v, n, _PROT_NONE, _MAP_ANON|_MAP_PRIVATE, -1, 0)
if err != 0 {
return nil
}
@ -63,7 +63,7 @@ func sysMap(v unsafe.Pointer, n uintptr, sysStat *uint64) {
// AIX does not allow mapping a range that is already mapped.
// So always unmap first even if it is already unmapped.
munmap(v, n)
p, err := mmap(v, n, _PROT_READ|_PROT_WRITE, _MAP_ANONYMOUS|_MAP_FIXED|_MAP_PRIVATE, -1, 0)
p, err := mmap(v, n, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_FIXED|_MAP_PRIVATE, -1, 0)
if err == _ENOMEM {
throw("runtime: out of memory")

7
src/runtime/runtime_mmap_test.go
View File

@ -2,7 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
// +build aix darwin dragonfly freebsd linux nacl netbsd openbsd solaris
package runtime_test
@ -34,6 +34,11 @@ func TestPhysPageSize(t *testing.T) {
t.Fatalf("Mmap: %v", err)
}
if runtime.GOOS == "aix" {
// AIX does not allow mapping a range that is already mapped.
runtime.Munmap(unsafe.Pointer(uintptr(b)), 2*ps)
}
// Mmap should fail at a half page into the buffer.
_, err = runtime.Mmap(unsafe.Pointer(uintptr(b)+ps/2), ps, 0, runtime.MAP_ANON|runtime.MAP_PRIVATE|runtime.MAP_FIXED, -1, 0)
if err == 0 {