blob: cc24d3ef4a5ed91ce0155bad47aa3cf4f81d42dc [file] [log] [blame]
// 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_LINUX)
#include "vm/cpuid.h"
#include "vm/cpuinfo.h"
#include "vm/proccpuinfo.h"
#include "platform/assert.h"
// As with Windows, on IA32 and X64, we use the cpuid instruction.
// The analogous instruction is privileged on ARM, so we resort to
// reading from /proc/cpuinfo.
namespace dart {
CpuInfoMethod CpuInfo::method_ = kCpuInfoDefault;
const char* CpuInfo::fields_[kCpuInfoMax] = {};
void CpuInfo::Init() {
#if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
fields_[kCpuInfoProcessor] = "vendor_id";
fields_[kCpuInfoModel] = "model name";
fields_[kCpuInfoHardware] = "model name";
fields_[kCpuInfoFeatures] = "flags";
fields_[kCpuInfoArchitecture] = "CPU architecture";
method_ = kCpuInfoCpuId;
CpuId::Init();
#elif defined(HOST_ARCH_ARM)
fields_[kCpuInfoProcessor] = "Processor";
fields_[kCpuInfoModel] = "model name";
fields_[kCpuInfoHardware] = "Hardware";
fields_[kCpuInfoFeatures] = "Features";
fields_[kCpuInfoArchitecture] = "CPU architecture";
method_ = kCpuInfoSystem;
ProcCpuInfo::Init();
#elif defined(HOST_ARCH_ARM64)
fields_[kCpuInfoProcessor] = "Processor";
fields_[kCpuInfoModel] = "CPU implementer";
fields_[kCpuInfoHardware] = "CPU implementer";
fields_[kCpuInfoFeatures] = "Features";
fields_[kCpuInfoArchitecture] = "CPU architecture";
method_ = kCpuInfoSystem;
ProcCpuInfo::Init();
#elif defined(HOST_ARCH_RISCV32) || defined(HOST_ARCH_RISCV64)
// We only rely on the base Linux configuration of IMAFDC, so don't need
// dynamic feature detection.
method_ = kCpuInfoNone;
#else
#error Unrecognized target architecture
#endif
}
void CpuInfo::Cleanup() {
if (method_ == kCpuInfoCpuId) {
CpuId::Cleanup();
} else if (method_ == kCpuInfoSystem) {
ProcCpuInfo::Cleanup();
} else {
ASSERT(method_ == kCpuInfoNone);
}
}
bool CpuInfo::FieldContains(CpuInfoIndices idx, const char* search_string) {
if (method_ == kCpuInfoCpuId) {
const char* field = CpuId::field(idx);
if (field == nullptr) return false;
bool contains = (strstr(field, search_string) != nullptr);
free(const_cast<char*>(field));
return contains;
} else if (method_ == kCpuInfoSystem) {
return ProcCpuInfo::FieldContains(FieldName(idx), search_string);
} else {
UNREACHABLE();
}
}
const char* CpuInfo::ExtractField(CpuInfoIndices idx) {
if (method_ == kCpuInfoCpuId) {
return CpuId::field(idx);
} else if (method_ == kCpuInfoSystem) {
return ProcCpuInfo::ExtractField(FieldName(idx));
} else {
UNREACHABLE();
}
}
bool CpuInfo::HasField(const char* field) {
if (method_ == kCpuInfoCpuId) {
return (strcmp(field, fields_[kCpuInfoProcessor]) == 0) ||
(strcmp(field, fields_[kCpuInfoModel]) == 0) ||
(strcmp(field, fields_[kCpuInfoHardware]) == 0) ||
(strcmp(field, fields_[kCpuInfoFeatures]) == 0);
} else if (method_ == kCpuInfoSystem) {
return ProcCpuInfo::HasField(field);
} else if (method_ == kCpuInfoNone) {
return false;
} else {
UNREACHABLE();
}
}
} // namespace dart
#endif // defined(DART_HOST_OS_LINUX)