[all-commits] [llvm/llvm-project] 15189d: Set PERF_IOC_FLAG_GROUP on ioctl calls

[Aiden Grossman via All-commits]

  Branch: refs/heads/users/boomanaiden154/exegesis-validation-counters-implementation
  Home:   https://github.com/llvm/llvm-project
  Commit: 15189d46487b6594ece1f0adbb71adab059dea0b
      https://github.com/llvm/llvm-project/commit/15189d46487b6594ece1f0adbb71adab059dea0b
  Author: Aiden Grossman <agrossman154 at yahoo.com>
  Date:   2024-01-03 (Wed, 03 Jan 2024)

  Changed paths:
    M llvm/tools/llvm-exegesis/lib/PerfHelper.cpp
    M llvm/tools/llvm-exegesis/lib/X86/Target.cpp

  Log Message:
  -----------
  Set PERF_IOC_FLAG_GROUP on ioctl calls

Without this call, the ioctl calls only work by chance and fail in
certain cases, like when the users sets the RDX register in subprocess
mode.