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Commit 426e326a authored by wlei's avatar wlei
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[CSSPGO][llvm-profgen] Renovate perfscript check and command line input validation

This include some changes related with PerfReader's the input check and command line change:

1) It appears there might be thousands of leading MMAP-Event line in the perfscript for large workload. For this case, the 4k threshold is not eligible to determine it's a hybrid sample. This change renovated the `isHybridPerfScript` by going through the script without threshold limitation checking whether there is a non-empty call stack immediately followed by a LBR sample. It will stop once it find a valid one.

2) Added several input validations for the command line switches in PerfReader.

3) Changed the command line `show-disassembly` to `show-disassembly-only`, it will print to stdout and exit early which leave an empty output profile.

Reviewed By: hoy, wenlei

Differential Revision: https://reviews.llvm.org/D96387
parent f800a9bd
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