Ryan Macnak
877284947b
Like HOST_ARCH_*, HOST_OS_* describes the OS the VM is running on, which may be different from the OS the VM is generating code for during AOT compilation. Currently we conflate the two when emitting AOT as assembly, and we get away with it because Flutter only uses assembly for targeting iOS and one can only target iOS from a Mac, but we expect to use assembly for Android as well so native tools can unwind Dart frames. R=zra@google.com Review-Url: https://codereview.chromium.org/2750843003 .
110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(HOST_OS_LINUX)
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#include "vm/cpuinfo.h"
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#include "vm/cpuid.h"
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#include "vm/proccpuinfo.h"
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#include "platform/assert.h"
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// As with Windows, on IA32 and X64, we use the cpuid instruction.
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// The analogous instruction is privileged on ARM and MIPS, so we resort to
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// reading from /proc/cpuinfo.
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namespace dart {
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CpuInfoMethod CpuInfo::method_ = kCpuInfoDefault;
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const char* CpuInfo::fields_[kCpuInfoMax] = {0};
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void CpuInfo::InitOnce() {
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#if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
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fields_[kCpuInfoProcessor] = "vendor_id";
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fields_[kCpuInfoModel] = "model name";
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fields_[kCpuInfoHardware] = "model name";
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fields_[kCpuInfoFeatures] = "flags";
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fields_[kCpuInfoArchitecture] = "CPU architecture";
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method_ = kCpuInfoCpuId;
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CpuId::InitOnce();
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#elif defined(HOST_ARCH_ARM)
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fields_[kCpuInfoProcessor] = "Processor";
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fields_[kCpuInfoModel] = "model name";
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fields_[kCpuInfoHardware] = "Hardware";
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fields_[kCpuInfoFeatures] = "Features";
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fields_[kCpuInfoArchitecture] = "CPU architecture";
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method_ = kCpuInfoSystem;
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ProcCpuInfo::InitOnce();
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#elif defined(HOST_ARCH_ARM64)
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fields_[kCpuInfoProcessor] = "Processor";
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fields_[kCpuInfoModel] = "CPU implementer";
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fields_[kCpuInfoHardware] = "CPU implementer";
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fields_[kCpuInfoFeatures] = "Features";
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fields_[kCpuInfoArchitecture] = "CPU architecture";
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method_ = kCpuInfoSystem;
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ProcCpuInfo::InitOnce();
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#elif defined(HOST_ARCH_MIPS)
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fields_[kCpuInfoProcessor] = "system type";
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fields_[kCpuInfoModel] = "cpu model";
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fields_[kCpuInfoHardware] = "cpu model";
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fields_[kCpuInfoFeatures] = "ASEs implemented";
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fields_[kCpuInfoArchitecture] = "CPU architecture";
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method_ = kCpuInfoSystem;
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ProcCpuInfo::InitOnce();
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#else
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#error Unrecognized target architecture
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#endif
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}
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void CpuInfo::Cleanup() {
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if (method_ == kCpuInfoCpuId) {
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CpuId::Cleanup();
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} else {
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ASSERT(method_ == kCpuInfoSystem);
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ProcCpuInfo::Cleanup();
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}
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}
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bool CpuInfo::FieldContains(CpuInfoIndices idx, const char* search_string) {
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if (method_ == kCpuInfoCpuId) {
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const char* field = CpuId::field(idx);
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bool contains = (strstr(field, search_string) != NULL);
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free(const_cast<char*>(field));
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return contains;
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} else {
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ASSERT(method_ == kCpuInfoSystem);
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return ProcCpuInfo::FieldContains(FieldName(idx), search_string);
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}
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}
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const char* CpuInfo::ExtractField(CpuInfoIndices idx) {
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if (method_ == kCpuInfoCpuId) {
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return CpuId::field(idx);
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} else {
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ASSERT(method_ == kCpuInfoSystem);
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return ProcCpuInfo::ExtractField(FieldName(idx));
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}
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}
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bool CpuInfo::HasField(const char* field) {
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if (method_ == kCpuInfoCpuId) {
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return (strcmp(field, fields_[kCpuInfoProcessor]) == 0) ||
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(strcmp(field, fields_[kCpuInfoModel]) == 0) ||
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(strcmp(field, fields_[kCpuInfoHardware]) == 0) ||
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(strcmp(field, fields_[kCpuInfoFeatures]) == 0);
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} else {
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ASSERT(method_ == kCpuInfoSystem);
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return ProcCpuInfo::HasField(field);
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}
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}
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} // namespace dart
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#endif // defined(HOST_OS_LINUX)
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