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 .
111 lines
2.4 KiB
C++
111 lines
2.4 KiB
C++
// Copyright (c) 2014, 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(TARGET_ARCH_ARM64)
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#include "vm/cpu.h"
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#include "vm/cpu_arm64.h"
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#include "vm/cpuinfo.h"
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#include "vm/simulator.h"
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#if !defined(USING_SIMULATOR)
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#include <sys/syscall.h> /* NOLINT */
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#include <unistd.h> /* NOLINT */
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#endif
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namespace dart {
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void CPU::FlushICache(uword start, uword size) {
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#if HOST_OS_IOS
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// Precompilation never patches code so there should be no I cache flushes.
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UNREACHABLE();
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#endif
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#if !defined(USING_SIMULATOR) && !HOST_OS_IOS
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// Nothing to do. Flushing no instructions.
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if (size == 0) {
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return;
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}
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// ARM recommends using the gcc intrinsic __clear_cache on Linux and Android.
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// blogs.arm.com/software-enablement/141-caches-and-self-modifying-code/
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#if defined(HOST_OS_ANDROID) || defined(HOST_OS_FUCHSIA) || \
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defined(HOST_OS_LINUX)
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extern void __clear_cache(char*, char*);
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char* beg = reinterpret_cast<char*>(start);
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char* end = reinterpret_cast<char*>(start + size);
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::__clear_cache(beg, end);
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#else
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#error FlushICache only tested/supported on Android, Fuchsia, and Linux
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#endif
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#endif
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}
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const char* CPU::Id() {
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return
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#if defined(USING_SIMULATOR)
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"sim"
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#endif // !defined(HOST_ARCH_ARM64)
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"arm64";
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}
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const char* HostCPUFeatures::hardware_ = NULL;
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#if defined(DEBUG)
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bool HostCPUFeatures::initialized_ = false;
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#endif
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#if !defined(USING_SIMULATOR)
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void HostCPUFeatures::InitOnce() {
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CpuInfo::InitOnce();
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hardware_ = CpuInfo::GetCpuModel();
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#if defined(DEBUG)
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initialized_ = true;
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#endif
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}
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void HostCPUFeatures::Cleanup() {
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DEBUG_ASSERT(initialized_);
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#if defined(DEBUG)
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initialized_ = false;
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#endif
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ASSERT(hardware_ != NULL);
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free(const_cast<char*>(hardware_));
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hardware_ = NULL;
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CpuInfo::Cleanup();
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}
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#else // !defined(USING_SIMULATOR)
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void HostCPUFeatures::InitOnce() {
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CpuInfo::InitOnce();
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hardware_ = CpuInfo::GetCpuModel();
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#if defined(DEBUG)
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initialized_ = true;
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#endif
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}
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void HostCPUFeatures::Cleanup() {
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DEBUG_ASSERT(initialized_);
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#if defined(DEBUG)
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initialized_ = false;
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#endif
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ASSERT(hardware_ != NULL);
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free(const_cast<char*>(hardware_));
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hardware_ = NULL;
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CpuInfo::Cleanup();
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}
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#endif // !defined(USING_SIMULATOR)
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} // namespace dart
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#endif // defined TARGET_ARCH_ARM64
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