Overrides the default trace mechanism with a user-supplied version. A
trace represents the context from which an exception was thrown, and the
trace handler will be called when this occurs. The pointer supplied to
this routine indicates the base address from which tracing should occur.
If the supplied pointer is null then the trace routine should determine
an appropriate calling context from which to begin the trace.
The D Programming Language's Unofficial Docs
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Overrides the default trace mechanism with a user-supplied version. A trace represents the context from which an exception was thrown, and the trace handler will be called when this occurs. The pointer supplied to this routine indicates the base address from which tracing should occur. If the supplied pointer is null then the trace routine should determine an appropriate calling context from which to begin the trace.