trace.hh

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/*
 * Copyright (c) 2014, 2019, 2021 Arm Limited
 * All rights reserved
 *
 * Copyright (c) 2001-2006 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __BASE_TRACE_HH__
#define __BASE_TRACE_HH__
 
#include <ostream>
#include <string>
#include <sstream>
 
#include "base/compiler.hh"
#include "base/cprintf.hh"
#include "base/debug.hh"
#include "base/logging.hh"
#include "base/match.hh"
#include "base/types.hh"
#include "sim/cur_tick.hh"
 
// Return the global context name "global".  This function gets called when
// the DPRINTF macros are used in a context without a visible name() function
// @todo This should be moved to the gem5 namespace
const std::string &name();
 
namespace gem5
{
 
namespace trace {
 
class Logger
{
  protected:
    ObjectMatch ignore;
    ObjectMatch activate;
 
    bool isEnabled(const std::string &name) const
    {
        if (name.empty()) // Enable the logger with a empty name.
            return true;
        bool ignore_match = ignore.match(name);
        bool activate_match = activate.match(name);
        if (ignore_match && activate_match)
            panic("%s in both ignore and activate.\n", name);
        if (ignore_match)
            return false;
        if (!activate.empty() && !activate_match)
            return false;
        return true;
    }
 
  public:
    template <typename ...Args>
    void dprintf(Tick when, const std::string &name, const char *fmt,
                 const Args &...args)
    {
        dprintf_flag(when, name, "", fmt, args...);
    }
 
    template <typename ...Args>
    void dprintf_flag(Tick when, const std::string &name,
            const std::string &flag,
            const char *fmt, const Args &...args)
    {
        if (!isEnabled(name))
            return;
        std::ostringstream line;
        ccprintf(line, fmt, args...);
        logMessage(when, name, flag, line.str());
    }
 
    void dump(Tick when, const std::string &name,
            const void *d, int len, const std::string &flag);
 
    virtual void logMessage(Tick when, const std::string &name,
            const std::string &flag, const std::string &message) = 0;
 
    virtual std::ostream &getOstream() = 0;
 
    void setIgnore(ObjectMatch &ignore_) { ignore = ignore_; }
 
    void addIgnore(const ObjectMatch &ignore_) { ignore.add(ignore_); }
 
    void setActivate(ObjectMatch &activate_) { activate = activate_; }
 
    void addActivate(const ObjectMatch &activate_) { activate.add(activate_); }
 
    virtual ~Logger() { }
};
 
class OstreamLogger : public Logger
{
  protected:
    std::ostream &stream;
 
  public:
    OstreamLogger(std::ostream &stream_) : stream(stream_)
    { }
 
    void logMessage(Tick when, const std::string &name,
            const std::string &flag, const std::string &message) override;
 
    std::ostream &getOstream() override { return stream; }
};
 
Logger *getDebugLogger();
 
std::ostream &output();
 
void setDebugLogger(Logger *logger);
 
void enable();
void disable();
 
} // namespace trace
 
// This silly little class allows us to wrap a string in a functor
// object so that we can give a name() that DPRINTF will like
struct StringWrap
{
    std::string str;
    StringWrap(const std::string &s) : str(s) {}
    const std::string &operator()() const { return str; }
};
 
#define DDUMP(x, data, count) do {               \
    if (GEM5_UNLIKELY(TRACING_ON && ::gem5::debug::x))     \
        ::gem5::trace::getDebugLogger()->dump(           \
            ::gem5::curTick(), name(), data, count, #x); \
} while (0)
 
#define DPRINTF(x, ...) do {                     \
    if (GEM5_UNLIKELY(TRACING_ON && ::gem5::debug::x)) {   \
        ::gem5::trace::getDebugLogger()->dprintf_flag(   \
            ::gem5::curTick(), name(), #x, __VA_ARGS__); \
    }                                            \
} while (0)
 
#define DPRINTFS(x, s, ...) do {                        \
    if (GEM5_UNLIKELY(TRACING_ON && ::gem5::debug::x)) {          \
        ::gem5::trace::getDebugLogger()->dprintf_flag(          \
                ::gem5::curTick(), (s)->name(), #x, __VA_ARGS__); \
    }                                                   \
} while (0)
 
#define DPRINTFR(x, ...) do {                          \
    if (GEM5_UNLIKELY(TRACING_ON && ::gem5::debug::x)) {         \
        ::gem5::trace::getDebugLogger()->dprintf_flag(         \
            (::gem5::Tick)-1, std::string(), #x, __VA_ARGS__); \
    }                                                  \
} while (0)
 
#define DPRINTFV(x, ...) do {                          \
    if (GEM5_UNLIKELY(TRACING_ON && (x))) {              \
        ::gem5::trace::getDebugLogger()->dprintf_flag(         \
            ::gem5::curTick(), name(), x.name(), __VA_ARGS__); \
    }                                                  \
} while (0)
 
#define DPRINTFN(...) do {                                                \
    if (TRACING_ON) {                                                     \
        ::gem5::trace::getDebugLogger()->dprintf( \
            ::gem5::curTick(), name(), __VA_ARGS__); \
    }                                                                     \
} while (0)
 
#define DPRINTFNR(...) do {                                          \
    if (TRACING_ON) {                                                \
        ::gem5::trace::getDebugLogger()->dprintf( \
            (::gem5::Tick)-1, "", __VA_ARGS__); \
    }                                                                \
} while (0)
 
#define DPRINTF_UNCONDITIONAL(x, ...)                      \
    GEM5_DEPRECATED_MACRO_STMT(DPRINTF_UNCONDITIONAL,      \
    do {                                                   \
        if (TRACING_ON) {                                  \
            ::gem5::trace::getDebugLogger()->dprintf_flag(         \
                ::gem5::curTick(), name(), #x, __VA_ARGS__);       \
        }                                                  \
    } while (0),                                           \
    "Use DPRINTFN or DPRINTF with a debug flag instead.")
 
 // end of api_trace
 
} // namespace gem5
 
#endif // __BASE_TRACE_HH__