Add a deterministic execution mode #120
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Adds support for a --deterministic command-line option that makes repeated runs the same: - Keyboard and mouse input is ignored - The sound server does a periodic pull from the DMA channel (so that it gets drained), but only does so via a periodic timer (instead of being driven by a cubeb callback, which could arrive at different times) - Disk image writes are disabled (reads of a modified area still work via an in-memory copy) - NVRAM writes are disabled - The current time that ViaCuda initializes the guest OS is always the same. This makes execution exactly the same each time, which should make debugging of more subtle issues easier. To validate that the deterministic mode is working, I've added a periodic log of the current "time" (measured in cycle count), PC and opcode. When comparing two runs with --log-no-uptime, the generated log files are identical.
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Adds support for a
--deterministiccommand-line option that makes repeated runs the same:ViaCudainitializes the guest OS is always the same.This makes execution exactly the same each time, which should make debugging of more subtle issues easier.
To validate that the deterministic mode is working, I've added a periodic log of the current "time" (measured in cycle count), PC and opcode. When comparing two runs with
--log-no-uptime, the generated log files are identical.