195 lines
6.6 KiB
C#
195 lines
6.6 KiB
C#
|
//
|
||
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
||
|
|
//
|
||
|
|
|
||
|
|
/*******************************************************************/
|
||
|
|
/* WARNING */
|
||
|
|
/* This file should be identical in the Bartok and Singularity */
|
||
|
|
/* depots. Master copy resides in Bartok Depot. Changes should be */
|
||
|
|
/* made to Bartok Depot and propagated to Singularity Depot. */
|
||
|
|
/*******************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
// Provides a number of "magic" casting functions needed by trusted components
|
||
|
|
// of the runtime.
|
||
|
|
|
||
|
|
namespace Microsoft.Bartok.Runtime {
|
||
|
|
|
||
|
|
using System;
|
||
|
|
using System.Runtime.CompilerServices;
|
||
|
|
using System.Threading;
|
||
|
|
|
||
|
|
internal sealed class Magic {
|
||
|
|
|
||
|
|
// Returns the offset of the vtable from the base of an object.
|
||
|
|
// The base is the beginning of the PostHeader.
|
||
|
|
// Typically callers should access Object's vtable property directly,
|
||
|
|
// but this is used by a few places that may be abusing the vtable slot
|
||
|
|
// to hold values of type UIntPtr.
|
||
|
|
internal static extern UIntPtr OffsetOfVTable {
|
||
|
|
[NoHeapAllocation]
|
||
|
|
[Intrinsic]
|
||
|
|
get;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Cast an object to a UIntPtr, equivalent to MSIL conv.u.
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern UIntPtr addressOf(Object o);
|
||
|
|
|
||
|
|
// The toPointer family of methods cast a managed pointer to T to an
|
||
|
|
// unmanaged pointer to T. Exceptions are the Object and VTable
|
||
|
|
// versions which return UIntPtr* instead since Object* and VTable*
|
||
|
|
// are illegal. These are equivalent to MSIL conv.u.
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern UIntPtr *toPointer(ref Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern bool *toPointer(ref bool o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern char *toPointer(ref char o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern float *toPointer(ref float o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern double *toPointer(ref double o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern sbyte *toPointer(ref sbyte o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern short *toPointer(ref short o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern int *toPointer(ref int o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern long *toPointer(ref long o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern IntPtr *toPointer(ref IntPtr o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern byte *toPointer(ref byte o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern ushort *toPointer(ref ushort o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern uint *toPointer(ref uint o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern ulong *toPointer(ref ulong o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern UIntPtr *toPointer(ref UIntPtr o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static unsafe extern UIntPtr *toPointer(ref VTable o);
|
||
|
|
|
||
|
|
// Cast a UIntPtr to an object. This has no MSIL instruction
|
||
|
|
// equivalent. This is used, for example, at the birth point of an
|
||
|
|
// object.
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern Object fromAddress(UIntPtr v);
|
||
|
|
|
||
|
|
// The various toXXX methods are unchecked (and therefore unsafe)
|
||
|
|
// downcasts. They are used in places where vtables may be invalid (and
|
||
|
|
// hence checked casts would fail). Uses as hand-optimizations should
|
||
|
|
// be avoided when possible.
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern Thread toThread(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern Monitor toMonitor(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern EMU toEMU(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern VTable toVTable(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern Array toArray(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern UIntPtr[] toUIntPtrVector(Array a);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern String toString(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern RuntimeType toRuntimeType(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern Type toType(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
[NoHeapAllocation]
|
||
|
|
internal static extern uint[] toUIntArray(Object o);
|
||
|
|
|
||
|
|
[Intrinsic]
|
||
|
|
internal static extern WeakReference toWeakReference(Object o);
|
||
|
|
|
||
|
|
// Performs an indirect call on the pointer 'p'.
|
||
|
|
// This is equivalent to MSIL calli on the signature ()->void.
|
||
|
|
[Intrinsic]
|
||
|
|
internal static extern void calli(System.UIntPtr p);
|
||
|
|
|
||
|
|
// Performs an indirect call on the pointer 'p' with argument 'v'.
|
||
|
|
// This is equivalent to MSIL calli on the signature (UIntPtr)->void.
|
||
|
|
[Intrinsic]
|
||
|
|
internal static extern void calli(System.UIntPtr p, System.UIntPtr v);
|
||
|
|
|
||
|
|
// Calls the Finalize method on an object. This is needed for the
|
||
|
|
// finalizer implementation because C# will not allow direct calls to
|
||
|
|
// finalizers.
|
||
|
|
[Intrinsic]
|
||
|
|
internal static extern void callFinalizer(Object o);
|
||
|
|
|
||
|
|
// These are very dangerous utilties that essentially do
|
||
|
|
//
|
||
|
|
// [o + offset] = data
|
||
|
|
//
|
||
|
|
// They are currently used for undoing heap stores collected in the
|
||
|
|
// tryall/atomic logs. Any other use should be cleared by at least the
|
||
|
|
// Bartok team.
|
||
|
|
[Intrinsic]
|
||
|
|
internal static extern void SetAt(Object o, UIntPtr offset,
|
||
|
|
UIntPtr data);
|
||
|
|
[Intrinsic]
|
||
|
|
internal static extern void SetAt(Object o, UIntPtr offset,
|
||
|
|
Object data);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|