debug.hh

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/*
 * Copyright (c) 2020 ARM Limited
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 *
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 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
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 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2003-2005 The Regents of The University of Michigan
 * Copyright (c) 2010 The Hewlett-Packard Development Company
 * All rights reserved.
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#ifndef __BASE_DEBUG_HH__
#define __BASE_DEBUG_HH__
 
#include <initializer_list>
#include <map>
#include <string>
#include <vector>
 
namespace Debug {
 
void breakpoint();
 
class Flag
{
  protected:
    static bool _globalEnable; // whether debug tracings are enabled
 
    const char *_name;
    const char *_desc;
 
    virtual void sync() { }
 
  public:
    Flag(const char *name, const char *desc);
    virtual ~Flag();
 
    std::string name() const { return _name; }
    std::string desc() const { return _desc; }
 
    virtual void enable() = 0;
    virtual void disable() = 0;
    virtual bool status() const = 0;
 
    operator bool() const { return status(); }
    bool operator!() const { return !status(); }
 
    static void globalEnable();
    static void globalDisable();
};
 
class SimpleFlag : public Flag
{
  protected:
    bool _tracing; // tracing is enabled and flag is on
    bool _status;  // flag status
 
    void sync() override { _tracing = _globalEnable && _status; }
 
  public:
    SimpleFlag(const char *name, const char *desc)
        : Flag(name, desc), _status(false)
    { }
 
    bool status() const override { return _tracing; }
 
    void enable() override  { _status = true;  sync(); }
    void disable() override { _status = false; sync(); }
};
 
class CompoundFlag : public Flag
{
  protected:
    std::vector<Flag *> _kids;
 
  public:
    template<typename... Args>
    CompoundFlag(const char *name, const char *desc,
                 std::initializer_list<Flag *> flags)
        : Flag(name, desc),
          _kids(flags)
    {
    }
 
    const std::vector<Flag *> &kids() const { return _kids; }
 
    void enable() override;
    void disable() override;
    bool status() const override;
};
 
typedef std::map<std::string, Flag *> FlagsMap;
FlagsMap &allFlags();
 
Flag *findFlag(const std::string &name);
 
bool changeFlag(const char *s, bool value);
 
} // namespace Debug
 
void setDebugFlag(const char *string);
 
void clearDebugFlag(const char *string);
 
void dumpDebugFlags();
 
#if TRACING_ON
#   define DTRACE(x) (Debug::x)
#else // !TRACING_ON
#   define DTRACE(x) (false)
#endif  // TRACING_ON
 // end of api_trace
 
#endif // __BASE_DEBUG_HH__