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f7b7e8bc87
Add availability checks to the os_signpost code so this can be used with an older deployment target. Differential revision: https://reviews.llvm.org/D97410
136 lines
3.8 KiB
C++
136 lines
3.8 KiB
C++
//===-- Signposts.cpp - Interval debug annotations ------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Signposts.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Config/config.h"
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#if LLVM_SUPPORT_XCODE_SIGNPOSTS
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/Support/Mutex.h"
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#include <Availability.h>
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#include <os/signpost.h>
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#endif // if LLVM_SUPPORT_XCODE_SIGNPOSTS
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using namespace llvm;
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#if LLVM_SUPPORT_XCODE_SIGNPOSTS
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#define SIGNPOSTS_AVAILABLE() \
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__builtin_available(macos 10.14, iOS 12, tvOS 12, watchOS 5, *)
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namespace {
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os_log_t *LogCreator() {
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os_log_t *X = new os_log_t;
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*X = os_log_create("org.llvm.signposts", OS_LOG_CATEGORY_POINTS_OF_INTEREST);
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return X;
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}
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void LogDeleter(os_log_t *X) {
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os_release(*X);
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delete X;
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}
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} // end anonymous namespace
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namespace llvm {
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class SignpostEmitterImpl {
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using LogPtrTy = std::unique_ptr<os_log_t, std::function<void(os_log_t *)>>;
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using LogTy = LogPtrTy::element_type;
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LogPtrTy SignpostLog;
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DenseMap<const void *, os_signpost_id_t> Signposts;
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sys::SmartMutex<true> Mutex;
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LogTy &getLogger() const { return *SignpostLog; }
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os_signpost_id_t getSignpostForObject(const void *O) {
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sys::SmartScopedLock<true> Lock(Mutex);
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const auto &I = Signposts.find(O);
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if (I != Signposts.end())
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return I->second;
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os_signpost_id_t ID = {};
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if (SIGNPOSTS_AVAILABLE()) {
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ID = os_signpost_id_make_with_pointer(getLogger(), O);
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}
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const auto &Inserted = Signposts.insert(std::make_pair(O, ID));
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return Inserted.first->second;
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}
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public:
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SignpostEmitterImpl() : SignpostLog(LogCreator(), LogDeleter), Signposts() {}
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bool isEnabled() const {
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if (SIGNPOSTS_AVAILABLE())
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return os_signpost_enabled(*SignpostLog);
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return false;
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}
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void startInterval(const void *O, llvm::StringRef Name) {
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if (isEnabled()) {
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if (SIGNPOSTS_AVAILABLE()) {
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// Both strings used here are required to be constant literal strings.
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os_signpost_interval_begin(getLogger(), getSignpostForObject(O),
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"LLVM Timers", "Begin %s", Name.data());
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}
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}
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}
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void endInterval(const void *O, llvm::StringRef Name) {
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if (isEnabled()) {
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if (SIGNPOSTS_AVAILABLE()) {
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// Both strings used here are required to be constant literal strings.
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os_signpost_interval_end(getLogger(), getSignpostForObject(O),
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"LLVM Timers", "End %s", Name.data());
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}
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}
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}
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};
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} // end namespace llvm
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#endif // if LLVM_SUPPORT_XCODE_SIGNPOSTS
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#if LLVM_SUPPORT_XCODE_SIGNPOSTS
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#define HAVE_ANY_SIGNPOST_IMPL 1
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#else
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#define HAVE_ANY_SIGNPOST_IMPL 0
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#endif
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SignpostEmitter::SignpostEmitter() {
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#if HAVE_ANY_SIGNPOST_IMPL
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Impl = new SignpostEmitterImpl();
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#else // if HAVE_ANY_SIGNPOST_IMPL
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Impl = nullptr;
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#endif // if !HAVE_ANY_SIGNPOST_IMPL
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}
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SignpostEmitter::~SignpostEmitter() {
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#if HAVE_ANY_SIGNPOST_IMPL
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delete Impl;
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#endif // if HAVE_ANY_SIGNPOST_IMPL
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}
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bool SignpostEmitter::isEnabled() const {
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#if HAVE_ANY_SIGNPOST_IMPL
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return Impl->isEnabled();
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#else
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return false;
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#endif // if !HAVE_ANY_SIGNPOST_IMPL
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}
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void SignpostEmitter::startInterval(const void *O, StringRef Name) {
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#if HAVE_ANY_SIGNPOST_IMPL
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if (Impl == nullptr)
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return;
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return Impl->startInterval(O, Name);
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#endif // if !HAVE_ANY_SIGNPOST_IMPL
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}
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void SignpostEmitter::endInterval(const void *O, StringRef Name) {
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#if HAVE_ANY_SIGNPOST_IMPL
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if (Impl == nullptr)
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return;
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Impl->endInterval(O, Name);
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#endif // if !HAVE_ANY_SIGNPOST_IMPL
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}
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