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.force_tb (Forcibly Allow Branch Tracing)

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The .force_tb command forces the processor to trace branches early in the boot process.

.force_tb

Environment

Item Description
Modes User mode, kernel mode
Targets Live, crash dump
Platforms All

Remarks

Typically, branch tracing is enabled after the debugger initializes the processor control block (PRCB). This initialization occurs early in the boot process.

However, if you have to use the tb (Trace to Next Branch) command before this initialization, you can use the .force_tb command to enable branch tracing earlier. Use this command carefully because it can corrupt your processor state.