mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 20:39:01 +00:00
28 lines
1.1 KiB
HTML
28 lines
1.1 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title></title>
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</head>
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<body>
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<p>
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int3 is used to call the DebugStub. Currently all C# lines emit an int3 and
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DebugStub checks it against a list of current breakpoints.</p>
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<h3>
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Future Improvement</h3>
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<p>
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Int3 on every C# line does create likely a fair performance penalty.</p>
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<p>
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In the future the
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int3 ops should have noop placeholders which are dynamically replaced by int3
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ops on demand. Also in future dont need noop placeholders - could replace first
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byte of op and restore it...</p>
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<p>
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However Int3 is also used to monitor the serial port for commands. So if we make
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it a dynamic call, we still need to insert some special int3 or other calls to
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check for serial commands at some reguilar interval. We cannout use hardware
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interrupts. Maybe emit Int3 calls at every method or loop start?</p>
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</body>
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</html>
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