trace.hh

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/*
 * Copyright (c) 2014, 2019 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
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __BASE_TRACE_HH__
#define __BASE_TRACE_HH__
 
#include <string>
 
#include "base/cprintf.hh"
#include "base/debug.hh"
#include "base/match.hh"
#include "base/types.hh"
#include "sim/core.hh"
 
namespace Trace {
 
class Logger
{
  protected:
    ObjectMatch ignore;
 
  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 (!name.empty() && ignore.match(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_); }
 
    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; }
};
 
// Return the global context name "global".  This function gets called when
// the DPRINTF macros are used in a context without a visible name() function
const std::string &name();
 
// Interface for things with names. (cf. SimObject but without other
// functionality).  This is useful when using DPRINTF
class Named
{
  protected:
    const std::string _name;
 
  public:
    Named(const std::string &name_) : _name(name_) { }
 
  public:
    const std::string &name() const { return _name; }
};
 
#if TRACING_ON
 
#define DDUMP(x, data, count) do {               \
    using namespace Debug;                       \
    if (DTRACE(x))                               \
        Trace::getDebugLogger()->dump(           \
            curTick(), name(), data, count, #x); \
} while (0)
 
#define DPRINTF(x, ...) do {                     \
    using namespace Debug;                       \
    if (DTRACE(x)) {                             \
        Trace::getDebugLogger()->dprintf_flag(   \
            curTick(), name(), #x, __VA_ARGS__); \
    }                                            \
} while (0)
 
#define DPRINTFS(x, s, ...) do {                        \
    using namespace Debug;                              \
    if (DTRACE(x)) {                                    \
        Trace::getDebugLogger()->dprintf_flag(          \
                curTick(), s->name(), #x, __VA_ARGS__); \
    }                                                   \
} while (0)
 
#define DPRINTFR(x, ...) do {                          \
    using namespace Debug;                             \
    if (DTRACE(x)) {                                   \
        Trace::getDebugLogger()->dprintf_flag(         \
            (Tick)-1, std::string(), #x, __VA_ARGS__); \
    }                                                  \
} while (0)
 
#define DDUMPN(data, count) do {                                       \
    Trace::getDebugLogger()->dump(curTick(), name(), data, count);     \
} while (0)
 
#define DPRINTFN(...) do {                                             \
    Trace::getDebugLogger()->dprintf(curTick(), name(), __VA_ARGS__);  \
} while (0)
 
#define DPRINTFNR(...) do {                                                 \
    Trace::getDebugLogger()->dprintf((Tick)-1, std::string(), __VA_ARGS__); \
} while (0)
 
#define DPRINTF_UNCONDITIONAL(x, ...) do {    \
    Trace::getDebugLogger()->dprintf_flag(    \
        curTick(), name(), #x, __VA_ARGS__);  \
} while (0)
 
#else // !TRACING_ON
 
#define DDUMP(x, data, count) do {} while (0)
#define DPRINTF(x, ...) do {} while (0)
#define DPRINTFS(x, ...) do {} while (0)
#define DPRINTFR(...) do {} while (0)
#define DDUMPN(data, count) do {} while (0)
#define DPRINTFN(...) do {} while (0)
#define DPRINTFNR(...) do {} while (0)
#define DPRINTF_UNCONDITIONAL(x, ...) do {} while (0)
 
#endif  // TRACING_ON
 // end of api_trace
 
#endif // __BASE_TRACE_HH__