Add versioned dependencies from godep

1 files changed, 69 insertions, 0 deletions

diff --git a/Godeps/_workspace/src/github.com/obscuren/qml/testing.go b/Godeps/_workspace/src/github.com/obscuren/qml/testing.go
new file mode 100644
index 000000000..39a2a691d
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/obscuren/qml/testing.go
@@ -0,0 +1,69 @@
+package qml
+
+// #include <stdlib.h>
+// int mprotect(void *addr, size_t len, int prot);
+import "C"
+
+import (
+	"bytes"
+	"encoding/binary"
+	"gopkg.in/qml.v1/cdata"
+	"reflect"
+	"unsafe"
+)
+
+const pageSize = 4096
+
+func qmain() {
+	Run(func() error { tmain(); return nil })
+}
+
+func tmain() { tstub() }
+func tstub() { tstub() }
+
+func SetupTesting() {
+	ptr := func(f func()) uintptr { return reflect.ValueOf(f).Pointer() }
+	rmain, mmain := cdata.Addrs()
+	fset(rmain, mmain, ptr(qmain))
+	fset(ptr(tmain), ptr(tstub), mmain)
+}
+
+const (
+	protREAD  = 1
+	protWRITE = 2
+	protEXEC  = 4
+)
+
+func fset(target, old, new uintptr) {
+	pageOffset := target % pageSize
+	pageAddr := target - pageOffset
+
+	var mem []byte
+	memh := (*reflect.SliceHeader)(unsafe.Pointer(&mem))
+	memh.Data = pageAddr
+	memh.Len = pageSize * 2
+	memh.Cap = pageSize * 2
+
+	oldAddr := make([]byte, 8)
+	newAddr := make([]byte, 8)
+
+	binary.LittleEndian.PutUint64(oldAddr, uint64(old))
+	binary.LittleEndian.PutUint64(newAddr, uint64(new))
+
+	// BSD's syscall package misses Mprotect. Use cgo instead.
+	C.mprotect(unsafe.Pointer(pageAddr), C.size_t(len(mem)), protEXEC|protREAD|protWRITE)
+	defer C.mprotect(unsafe.Pointer(pageAddr), C.size_t(len(mem)), protEXEC|protREAD)
+
+	delta := make([]byte, 4)
+	for i, c := range mem[pageOffset:] {
+		if c == 0xe8 && int(pageOffset)+i+5 < len(mem) {
+			instrAddr := pageAddr + pageOffset + uintptr(i)
+			binary.LittleEndian.PutUint32(delta, uint32(old-instrAddr-5))
+			if bytes.Equal(mem[int(pageOffset)+i+1:int(pageOffset)+i+5], delta) {
+				binary.LittleEndian.PutUint32(mem[int(pageOffset)+i+1:], uint32(new-instrAddr-5))
+				return
+			}
+		}
+	}
+	panic("cannot setup qml package for testing")
+}