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API tweaks, tests.

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This commit is contained in:
Nuno Cruces
2024-06-24 15:48:17 +01:00
parent be024e2a16
commit 39dbc8e308
3 changed files with 54 additions and 1 deletions
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23
unix/mmap_unix_test.go
View File

@@ -9,6 +9,7 @@ package unix_test
import (
"runtime"
"testing"
"unsafe"
"golang.org/x/sys/unix"
)
@@ -49,3 +50,25 @@ func TestMmap(t *testing.T) {
t.Fatalf("Munmap: %v", err)
}
}
func TestMmapPtr(t *testing.T) {
mmapProt := unix.PROT_NONE
mmapPtrProt := unix.PROT_READ | unix.PROT_WRITE
b, err := unix.Mmap(-1, 0, 2*unix.Getpagesize(), mmapProt, unix.MAP_ANON|unix.MAP_PRIVATE)
if err != nil {
t.Fatalf("Mmap: %v", err)
}
if _, err := unix.MmapPtr(-1, 0, unsafe.Pointer(&b[0]), uintptr(unix.Getpagesize()),
mmapPtrProt, unix.MAP_ANON|unix.MAP_PRIVATE|unix.MAP_FIXED); err != nil {
t.Fatalf("MmapPtr: %v", err)
}
b[0] = 42
if err := unix.MunmapPtr(unsafe.Pointer(&b[0]), uintptr(unix.Getpagesize())); err != nil {
t.Fatalf("MunmapPtr: %v", err)
}
if err := unix.Munmap(b); err != nil {
t.Fatalf("Munmap: %v", err)
}
}

30
unix/mremap_test.go
View File

@@ -8,6 +8,7 @@ package unix_test
import (
"testing"
"unsafe"
"golang.org/x/sys/unix"
)
@@ -44,3 +45,32 @@ func TestMremap(t *testing.T) {
t.Fatalf("remapping to a fixed address; got %v, want %v", err, unix.EINVAL)
}
}
func TestMremapPtr(t *testing.T) {
mmapProt := unix.PROT_NONE
mmapPtrProt := unix.PROT_READ | unix.PROT_WRITE
b, err := unix.Mmap(-1, 0, 2*unix.Getpagesize(), mmapProt, unix.MAP_ANON|unix.MAP_PRIVATE)
if err != nil {
t.Fatalf("Mmap: %v", err)
}
if _, err := unix.MmapPtr(-1, 0, unsafe.Pointer(&b[0]), uintptr(unix.Getpagesize()),
mmapPtrProt, unix.MAP_ANON|unix.MAP_PRIVATE|unix.MAP_FIXED); err != nil {
t.Fatalf("MmapPtr: %v", err)
}
b[0] = 42
if _, err := unix.MremapPtr(
unsafe.Pointer(&b[0]), uintptr(unix.Getpagesize()),
unsafe.Pointer(&b[unix.Getpagesize()]), uintptr(unix.Getpagesize()),
unix.MremapFixed|unix.MremapMaymove); err != nil {
t.Fatalf("MremapPtr: %v", err)
}
if got := b[unix.Getpagesize()]; got != 42 {
t.Errorf("got %d, want 42", got)
}
if err := unix.Munmap(b); err != nil {
t.Fatalf("Munmap: %v", err)
}
}

2
unix/syscall_unix.go
View File

@@ -154,7 +154,7 @@ func Munmap(b []byte) (err error) {
return mapper.Munmap(b)
}
func MmapPtr(addr unsafe.Pointer, length uintptr, prot int, flags int, fd int, offset int64) (ret unsafe.Pointer, err error) {
func MmapPtr(fd int, offset int64, addr unsafe.Pointer, length uintptr, prot int, flags int) (ret unsafe.Pointer, err error) {
xaddr, err := mapper.mmap(uintptr(addr), length, prot, flags, fd, offset)
return unsafe.Pointer(xaddr), err
}