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Use rr-safe nopl; rdtsc sequence #50975

Merged
merged 1 commit into from
Aug 20, 2023
Merged

Use rr-safe nopl; rdtsc sequence #50975

merged 1 commit into from
Aug 20, 2023

Commits on Aug 19, 2023

  1. Use rr-safe nopl; rdtsc sequence 

    When running under `rr`, it needs to patch out `rdtsc` to record the values returned.
If this is not possible, `rr` falls back to an expensive signal-based emulation.
As of rr master, a specific `nopl; rdtsc` sequence may be used to guarantee that
`rdtsc` patching is always possible. Use this sequence for uses of rdtsc in our
runtime.
    @Keno
    Keno committed Aug 19, 2023
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