FunctionTailcall Function
Notifies the profiler that the currently executing function is about to perform a tail call to another function.
Note The FunctionTailcall function is deprecated in the .NET Framework version 2.0. It will continue to work, but will incur a performance penalty. Use the FunctionTailcall2 Function function instead.
void FunctionTailcall (
FunctionID funcID
);
Parameters
| Parameter | Description |
|---|---|
funcID |
[in] The identifier of the currently executing function that is about to make a tail call. |
Remarks
The target function of the tail call will use the current stack frame, and will return directly to the caller of the function that made the tail call. This means that a FunctionLeave Function callback will not be issued for a function that is the target of a tail call.
The FunctionTailcall function is a callback — you must implement it. The implementation must use the __declspec(naked) storage-class attribute.
You must save all registers that you use, including those in the floating-point processing unit (FPU), because the execution engine does not save any registers prior to calling FunctionTailcall.
The implementation of FunctionTailcall should not block because it will delay garbage collection (GC) and the implementation should not attempt a GC because the stack may not be in a GC-friendly state. If a GC is attempted, the runtime will block until FunctionTailcall returns.
Also, the FunctionTailcall function must not call into managed code or in any way cause a managed memory allocation.
Requirements
Platforms: Windows 2000, Windows XP, Windows Server 2003 family
Header: CorProf.idl
Library: CorGuids.lib
.NET Framework Version: 1.1, 1.0
See Also
Reference
FunctionEnter2 Function
FunctionLeave2 Function
ICorProfilerInfo2::SetEnterLeaveFunctionHooks2 Method