5de0a3e9da
In order to open perf events per core, we need to first get the list of core ids available in the system. So I'm adding a function that does that by parsing /proc/cpuinfo. That seems to be the simplest and most portable way to do that. Besides that, I made a few refactors and renames to reflect better that the cpu info that we use in lldb-server comes from procfs. Differential Revision: https://reviews.llvm.org/D124573
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
//===-- Procfs.h ---------------------------------------------- -*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// source/Plugins/Process/Linux/Procfs.h defines the symbols we need from
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// sys/procfs.h on Android/Linux for all supported architectures.
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#include <sys/ptrace.h>
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#include "llvm/Support/Error.h"
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#include <vector>
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#ifdef __ANDROID__
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#if defined(__arm64__) || defined(__aarch64__)
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typedef unsigned long elf_greg_t;
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typedef elf_greg_t
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elf_gregset_t[(sizeof(struct user_pt_regs) / sizeof(elf_greg_t))];
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typedef struct user_fpsimd_state elf_fpregset_t;
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#ifndef NT_FPREGSET
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#define NT_FPREGSET NT_PRFPREG
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#endif // NT_FPREGSET
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#elif defined(__mips__)
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#ifndef NT_FPREGSET
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#define NT_FPREGSET NT_PRFPREG
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#endif // NT_FPREGSET
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#endif
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#else // __ANDROID__
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#include <sys/procfs.h>
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#endif // __ANDROID__
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namespace lldb_private {
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namespace process_linux {
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/// \return
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/// The content of /proc/cpuinfo and cache it if errors didn't happen.
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llvm::Expected<llvm::ArrayRef<uint8_t>> GetProcfsCpuInfo();
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/// \return
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/// A list of available logical core ids given the contents of
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/// /proc/cpuinfo.
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llvm::Expected<std::vector<int>>
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GetAvailableLogicalCoreIDs(llvm::StringRef cpuinfo);
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/// \return
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/// A list with all the logical cores available in the system and cache it
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/// if errors didn't happen.
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llvm::Expected<llvm::ArrayRef<int>> GetAvailableLogicalCoreIDs();
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} // namespace process_linux
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} // namespace lldb_private
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