debug.hh

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 * to a hardware implementation of the functionality of the software
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#ifndef __BASE_DEBUG_HH__
#define __BASE_DEBUG_HH__
 
#include <initializer_list>
#include <iostream>
#include <map>
#include <string>
#include <vector>
 
#include "base/compiler.hh"
 
namespace gem5
{
 
namespace debug
{
 
void breakpoint();
 
class Flag
{
  protected:
    static bool _globalEnable; // whether debug tracings are enabled
 
    bool _tracing = false; // tracing is enabled and flag is on
 
    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; }
 
    bool tracing() const { return TRACING_ON && _tracing; }
 
    virtual void enable() = 0;
    virtual void disable() = 0;
 
    operator bool() const { return tracing(); }
 
    static void globalEnable();
    static void globalDisable();
};
 
class SimpleFlag : public Flag
{
  protected:
    const bool _isFormat = false;
 
    bool _enabled = false; // flag enablement status
 
    void sync() override { _tracing = _globalEnable && _enabled; }
 
  public:
    SimpleFlag(const char *name, const char *desc, bool is_format=false);
 
    void enable() override  { _enabled = true;  sync(); }
    void disable() override { _enabled = false; sync(); }
 
    bool isFormat() const { return _isFormat; }
};
 
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;
};
 
class AllFlagsFlag : public CompoundFlag
{
  protected:
    static int _version;
 
  public:
    AllFlagsFlag();
 
    void add(SimpleFlag *flag);
 
    static AllFlagsFlag &instance();
    static int version() { return _version; }
};
 
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(std::ostream &os=std::cout);
 
#define DTRACE(x) GEM5_DEPRECATED_MACRO(DTRACE, debug::x, \
        "Replace DTRACE(x) with debug::x.")
 // end of api_trace
 
} // namespace gem5
 
#endif // __BASE_DEBUG_HH__