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Iris logging and configuration environment variables

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Sending a request, a notification, and a response

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Numbers with arbitrary size and precision

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Fast argument parsing using sorted arguments

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Ordering rules for requests, notifications, and responses

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Compatibility rules for function callers and callees

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ElfDwarf scheme for canonical register numbers

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Reading and writing through caches and buffers

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Extending or replacing the semihosting implementation

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Instance registry, instance discovery, and interface discovery API

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Hierarchical instance names and instance classes

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Simulation instantiation and discovery API

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Connecting to a running simulation using IPC

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Instantiating a new simulation, in-process

# metadata.contentDescription
This document describes the Iris interface for debug and trace on Fast Models and other targets. Iris defines a generic function call mechanism, an object model, and a set of concrete functions for debug and trace.