cpuinfo_macos.cc

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// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
 
#include "vm/globals.h"
#if defined(DART_HOST_OS_MACOS)
 
#include "vm/cpuinfo.h"
 
#include <errno.h>       // NOLINT
#include <sys/sysctl.h>  // NOLINT
#include <sys/types.h>   // NOLINT
 
#include "platform/assert.h"
 
namespace dart {
 
CpuInfoMethod CpuInfo::method_ = kCpuInfoDefault;
const char* CpuInfo::fields_[kCpuInfoMax] = {};
 
void CpuInfo::Init() {
  method_ = kCpuInfoSystem;
 
  fields_[kCpuInfoProcessor] = "machdep.cpu.vendor";
  fields_[kCpuInfoModel] = "machdep.cpu.brand_string";
  fields_[kCpuInfoHardware] = "machdep.cpu.brand_string";
  fields_[kCpuInfoFeatures] = "machdep.cpu.features";
  fields_[kCpuInfoArchitecture] = nullptr;
}
 
void CpuInfo::Cleanup() {}
 
bool CpuInfo::FieldContains(CpuInfoIndices idx, const char* search_string) {
  ASSERT(method_ != kCpuInfoDefault);
  ASSERT(search_string != nullptr);
  const char* field = FieldName(idx);
  char dest[1024];
  size_t dest_len = 1024;
 
  ASSERT(HasField(field));
  if (sysctlbyname(field, dest, &dest_len, nullptr, 0) != 0) {
    UNREACHABLE();
    return false;
  }
 
  return (strcasestr(dest, search_string) != nullptr);
}
 
const char* CpuInfo::ExtractField(CpuInfoIndices idx) {
  ASSERT(method_ != kCpuInfoDefault);
  const char* field = FieldName(idx);
  ASSERT(field != nullptr);
  size_t result_len;
 
  ASSERT(HasField(field));
  if (sysctlbyname(field, nullptr, &result_len, nullptr, 0) != 0) {
    UNREACHABLE();
    return 0;
  }
 
  char* result = reinterpret_cast<char*>(malloc(result_len));
  if (sysctlbyname(field, result, &result_len, nullptr, 0) != 0) {
    UNREACHABLE();
    return 0;
  }
 
  return result;
}
 
bool CpuInfo::HasField(const char* field) {
  ASSERT(method_ != kCpuInfoDefault);
  ASSERT(field != nullptr);
  int ret = sysctlbyname(field, nullptr, nullptr, nullptr, 0);
  return (ret == 0);
}
 
}  // namespace dart
 
#endif  // defined(DART_HOST_OS_MACOS)