mirror of
https://github.com/almounah/go-buena-clr
synced 2026-06-06 15:14:29 +00:00
Ne0nd0g
208 lines
6.7 KiB
Go
208 lines
6.7 KiB
Go
// +build windows
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package clr
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import (
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"fmt"
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"syscall"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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// from mscorlib.tlh
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type MethodInfo struct {
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vtbl *MethodInfoVtbl
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}
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// MethodInfoVtbl Discovers the attributes of a method and provides access to method metadata.
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// Inheritance: Object -> MemberInfo -> MethodBase -> MethodInfo
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// MethodInfo Class: https://docs.microsoft.com/en-us/dotnet/api/system.reflection.methodinfo?view=net-5.0
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// MethodBase Class: https://docs.microsoft.com/en-us/dotnet/api/system.reflection.methodbase?view=net-5.0
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// MemberInfo Class: https://docs.microsoft.com/en-us/dotnet/api/system.reflection.memberinfo?view=net-5.0
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// Object Class: https://docs.microsoft.com/en-us/dotnet/api/system.object?view=net-5.0
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type MethodInfoVtbl struct {
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QueryInterface uintptr
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AddRef uintptr
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Release uintptr
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GetTypeInfoCount uintptr
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GetTypeInfo uintptr
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GetIDsOfNames uintptr
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Invoke uintptr
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get_ToString uintptr
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Equals uintptr
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GetHashCode uintptr
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GetType uintptr
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get_MemberType uintptr
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get_name uintptr
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get_DeclaringType uintptr
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get_ReflectedType uintptr
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GetCustomAttributes uintptr
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GetCustomAttributes_2 uintptr
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IsDefined uintptr
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GetParameters uintptr
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GetMethodImplementationFlags uintptr
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get_MethodHandle uintptr
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get_Attributes uintptr
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get_CallingConvention uintptr
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Invoke_2 uintptr
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get_IsPublic uintptr
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get_IsPrivate uintptr
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get_IsFamily uintptr
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get_IsAssembly uintptr
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get_IsFamilyAndAssembly uintptr
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get_IsFamilyOrAssembly uintptr
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get_IsStatic uintptr
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get_IsFinal uintptr
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get_IsVirtual uintptr
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get_IsHideBySig uintptr
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get_IsAbstract uintptr
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get_IsSpecialName uintptr
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get_IsConstructor uintptr
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Invoke_3 uintptr
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get_returnType uintptr
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get_ReturnTypeCustomAttributes uintptr
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GetBaseDefinition uintptr
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}
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func (obj *MethodInfo) QueryInterface(riid windows.GUID, ppvObject unsafe.Pointer) error {
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debugPrint("Entering into methodinfo.QueryInterface()...")
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hr, _, err := syscall.Syscall(
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obj.vtbl.QueryInterface,
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3,
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uintptr(unsafe.Pointer(obj)),
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uintptr(unsafe.Pointer(&riid)), // A reference to the interface identifier (IID) of the interface being queried for.
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uintptr(ppvObject),
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)
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if err != syscall.Errno(0) {
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return fmt.Errorf("the IUknown::QueryInterface method returned an error:\r\n%s", err)
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}
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if hr != S_OK {
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return fmt.Errorf("the IUknown::QueryInterface method method returned a non-zero HRESULT: 0x%x", hr)
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}
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return nil
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}
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func (obj *MethodInfo) AddRef() uintptr {
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ret, _, _ := syscall.Syscall(
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obj.vtbl.AddRef,
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1,
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uintptr(unsafe.Pointer(obj)),
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0,
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0)
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return ret
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}
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func (obj *MethodInfo) Release() uintptr {
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ret, _, _ := syscall.Syscall(
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obj.vtbl.Release,
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1,
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uintptr(unsafe.Pointer(obj)),
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0,
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0)
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return ret
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}
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// Invoke_3 Invokes the method or constructor reflected by this MethodInfo instance.
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// virtual HRESULT __stdcall Invoke_3 (
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// /*[in]*/ VARIANT obj,
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// /*[in]*/ SAFEARRAY * parameters,
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// /*[out,retval]*/ VARIANT * pRetVal ) = 0;
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// https://docs.microsoft.com/en-us/dotnet/api/system.reflection.methodbase.invoke?view=net-5.0
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func (obj *MethodInfo) Invoke_3(variantObj Variant, parameters *SafeArray) (err error) {
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debugPrint("Entering into methodinfo.Invoke_3()...")
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var pRetVal *Variant
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hr, _, err := syscall.Syscall6(
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obj.vtbl.Invoke_3,
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4,
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uintptr(unsafe.Pointer(obj)),
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uintptr(unsafe.Pointer(&variantObj)),
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uintptr(unsafe.Pointer(parameters)),
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uintptr(unsafe.Pointer(pRetVal)),
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0,
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0,
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)
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if err != syscall.Errno(0) {
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err = fmt.Errorf("the MethodInfo::Invoke_3 method returned an error:\r\n%s", err)
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return
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}
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// If the HRESULT is a TargetInvocationException, attempt to get the inner error
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// This currentl doesn't work
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if uint32(hr) == COR_E_TARGETINVOCATION {
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var iSupportErrorInfo *ISupportErrorInfo
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// See if MethodInfo supports the ISupportErrorInfo interface
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err = obj.QueryInterface(IID_ISupportErrorInfo, unsafe.Pointer(&iSupportErrorInfo))
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if err != nil {
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err = fmt.Errorf("the MethodInfo::QueryInterface method returned an error when looking for the ISupportErrorInfo interface:\r\n%s", err)
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return
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}
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// See if the ICorRuntimeHost interface supports the IErrorInfo interface
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// Not sure if there is an Interface ID for MethodInfo
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err = iSupportErrorInfo.InterfaceSupportsErrorInfo(IID_ICorRuntimeHost)
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if err != nil {
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err = fmt.Errorf("there was an error with the ISupportErrorInfo::InterfaceSupportsErrorInfo method:\r\n%s", err)
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return
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}
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// Get the IErrorInfo object
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iErrorInfo, errG := GetErrorInfo()
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if errG != nil {
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err = fmt.Errorf("there was an error getting the IErrorInfo object:\r\n%s", errG)
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return err
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}
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// Read the IErrorInfo description
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desc, errD := iErrorInfo.GetDescription()
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if errD != nil {
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err = fmt.Errorf("the IErrorInfo::GetDescription method returned an error:\r\n%s", errD)
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return err
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}
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if desc == nil {
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err = fmt.Errorf("the Assembly::Invoke_3 method returned a non-zero HRESULT: 0x%x", hr)
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return
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}
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err = fmt.Errorf("the Assembly::Invoke_3 method returned a non-zero HRESULT: 0x%x with an IErrorInfo description of: %s", hr, *desc)
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}
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if hr != S_OK {
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err = fmt.Errorf("the Assembly::Invoke_3 method returned a non-zero HRESULT: 0x%x", hr)
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return
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}
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if pRetVal != nil {
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err = fmt.Errorf("the Assembly::Invoke_3 method returned a non-zero pRetVal: %+v", pRetVal)
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return
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}
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err = nil
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return
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}
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// GetString returns a string that represents the current object
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// a string version of the method's signature
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// public virtual string ToString ();
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// https://docs.microsoft.com/en-us/dotnet/api/system.object.tostring?view=net-5.0#System_Object_ToString
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func (obj *MethodInfo) GetString() (str string, err error) {
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debugPrint("Entering into methodinfo.GetString()...")
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var object *string
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hr, _, err := syscall.Syscall(
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obj.vtbl.get_ToString,
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2,
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uintptr(unsafe.Pointer(obj)),
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uintptr(unsafe.Pointer(&object)),
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0,
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)
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if err != syscall.Errno(0) {
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err = fmt.Errorf("the MethodInfo::ToString method returned an error:\r\n%s", err)
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return
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}
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if hr != S_OK {
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err = fmt.Errorf("the Assembly::ToString method returned a non-zero HRESULT: 0x%x", hr)
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return
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}
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err = nil
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str = ReadUnicodeStr(unsafe.Pointer(object))
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return
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}
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