forked from OSchip/llvm-project
115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
//===-- DarwinLogCollector.h ------------------------------------*- C++ -*-===//
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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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#ifndef DarwinLogCollector_h
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#define DarwinLogCollector_h
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#include <sys/types.h>
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#include <memory>
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#include <mutex>
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#include <unordered_map>
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#include "ActivityStore.h"
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#include "ActivityStreamSPI.h"
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#include "DNBDefs.h"
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#include "DarwinLogEvent.h"
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#include "DarwinLogInterfaces.h"
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#include "JSON.h"
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class DarwinLogCollector;
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typedef std::shared_ptr<DarwinLogCollector> DarwinLogCollectorSP;
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class DarwinLogCollector
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: public std::enable_shared_from_this<DarwinLogCollector>,
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public ActivityStore {
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public:
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//------------------------------------------------------------------
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/// Return whether the os_log and activity tracing SPI is available.
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///
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/// @return \b true if the activity stream support is available,
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/// \b false otherwise.
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//------------------------------------------------------------------
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static bool IsSupported();
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//------------------------------------------------------------------
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/// Return a log function suitable for DNBLog to use as the internal
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/// logging function.
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///
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/// @return a DNBLog-style logging function if IsSupported() returns
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/// true; otherwise, returns nullptr.
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//------------------------------------------------------------------
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static DNBCallbackLog GetLogFunction();
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static bool StartCollectingForProcess(nub_process_t pid,
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const JSONObject &config);
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static bool CancelStreamForProcess(nub_process_t pid);
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static DarwinLogEventVector GetEventsForProcess(nub_process_t pid);
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~DarwinLogCollector();
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pid_t GetProcessID() const { return m_pid; }
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//------------------------------------------------------------------
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// ActivityStore API
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//------------------------------------------------------------------
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const char *GetActivityForID(os_activity_id_t activity_id) const override;
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std::string
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GetActivityChainForID(os_activity_id_t activity_id) const override;
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private:
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DarwinLogCollector() = delete;
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DarwinLogCollector(const DarwinLogCollector &) = delete;
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DarwinLogCollector &operator=(const DarwinLogCollector &) = delete;
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explicit DarwinLogCollector(nub_process_t pid,
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const LogFilterChainSP &filter_chain_sp);
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void SignalDataAvailable();
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void SetActivityStream(os_activity_stream_t activity_stream);
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bool HandleStreamEntry(os_activity_stream_entry_t entry, int error);
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DarwinLogEventVector RemoveEvents();
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void CancelActivityStream();
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void GetActivityChainForID_internal(os_activity_id_t activity_id,
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std::string &result, size_t depth) const;
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struct ActivityInfo {
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ActivityInfo(const char *name, os_activity_id_t activity_id,
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os_activity_id_t parent_activity_id)
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: m_name(name), m_id(activity_id), m_parent_id(parent_activity_id) {}
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const std::string m_name;
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const os_activity_id_t m_id;
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const os_activity_id_t m_parent_id;
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};
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using ActivityMap = std::unordered_map<os_activity_id_t, ActivityInfo>;
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const nub_process_t m_pid;
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os_activity_stream_t m_activity_stream;
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DarwinLogEventVector m_events;
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std::mutex m_events_mutex;
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LogFilterChainSP m_filter_chain_sp;
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/// Mutex to protect activity info (activity name and parent structures)
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mutable std::mutex m_activity_info_mutex;
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/// Map of activity id to ActivityInfo
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ActivityMap m_activity_map;
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};
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#endif /* LogStreamCollector_h */
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