tarmac_parser.hh

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/*
 * Copyright (c) 2011,2017-2019 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * 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
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * 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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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __ARCH_ARM_TRACERS_TARMAC_PARSER_HH__
#define __ARCH_ARM_TRACERS_TARMAC_PARSER_HH__

#include <fstream>
#include <unordered_map>

#include "arch/arm/registers.hh"
#include "base/trace.hh"
#include "base/types.hh"
#include "cpu/static_inst.hh"
#include "cpu/thread_context.hh"
#include "mem/request.hh"
#include "params/TarmacParser.hh"
#include "sim/insttracer.hh"
#include "tarmac_base.hh"

namespace Trace {

class TarmacParserRecord : public TarmacBaseRecord
{
  public:
    struct TarmacParserRecordEvent: public Event
    {
        TarmacParser& parent;
        ThreadContext* thread;
        const StaticInstPtr inst;
        ArmISA::PCState pc;
        bool mismatch;
        bool mismatchOnPcOrOpcode;

        TarmacParserRecordEvent(TarmacParser& _parent,
                                ThreadContext *_thread,
                                const StaticInstPtr _inst,
                                ArmISA::PCState _pc,
                                bool _mismatch,
                                bool _mismatch_on_pc_or_opcode) :
            parent(_parent), thread(_thread), inst(_inst), pc(_pc),
            mismatch(_mismatch),
            mismatchOnPcOrOpcode(_mismatch_on_pc_or_opcode)
        {
        }

        void process();
        const char *description() const;
    };

    struct ParserInstEntry : public InstEntry
    {
      public:
        uint64_t seq_num;
    };

    struct ParserRegEntry : public RegEntry
    {
      public:
        char repr[16];
    };

    struct ParserMemEntry : public MemEntry
    { };

    static const int MaxLineLength = 256;

    static void printMismatchHeader(const StaticInstPtr inst,
                                    ArmISA::PCState pc);

    TarmacParserRecord(Tick _when, ThreadContext *_thread,
                       const StaticInstPtr _staticInst, ArmISA::PCState _pc,
                       TarmacParser& _parent,
                       const StaticInstPtr _macroStaticInst = NULL);

    void dump() override;

    bool readMemNoEffect(Addr addr, uint8_t *data, unsigned size,
                         unsigned flags);

  private:
    bool advanceTrace();

    const char *iSetStateToStr(ISetState isetstate) const;

    static ParserInstEntry instRecord;

    static ParserRegEntry regRecord;

    static ParserMemEntry memRecord;

    static TarmacRecordType currRecordType;

    static char buf[MaxLineLength];

    static std::list<ParserRegEntry> destRegRecords;

    using MiscRegMap = std::unordered_map<std::string, RegIndex>;
    static MiscRegMap miscRegMap;

    bool parsingStarted;

    bool mismatch;

    bool mismatchOnPcOrOpcode;

    RequestPtr memReq;

    static int8_t maxVectorLength;

  protected:
    TarmacParser& parent;
};

class TarmacParser : public InstTracer
{
    friend class TarmacParserRecord;

  public:
    typedef TarmacParserParams Params;

    TarmacParser(const Params *p) : InstTracer(p), startPc(p->start_pc),
                                    exitOnDiff(p->exit_on_diff),
                                    exitOnInsnDiff(p->exit_on_insn_diff),
                                    memWrCheck(p->mem_wr_check),
                                    ignoredAddrRange(p->ignore_mem_addr),
                                    cpuId(p->cpu_id),
                                    macroopInProgress(false)
    {
        assert(!(exitOnDiff && exitOnInsnDiff));

        trace.open(p->path_to_trace.c_str());
        if (startPc == 0x0) {
            started = true;
        } else {
            advanceTraceToStartPc();
            started = false;
        }
    }

    virtual ~TarmacParser()
    {
        trace.close();
    }

    InstRecord *
    getInstRecord(Tick when, ThreadContext *tc, const StaticInstPtr staticInst,
                  ArmISA::PCState pc,
                  const StaticInstPtr macroStaticInst = NULL)
    {
        if (!started && pc.pc() == startPc)
            started = true;

        if (started)
            return new TarmacParserRecord(when, tc, staticInst, pc, *this,
                                          macroStaticInst);
        else
            return NULL;
    }

  private:
    void advanceTraceToStartPc();

    std::ifstream trace;

    Addr startPc;

    bool exitOnDiff;

    bool exitOnInsnDiff;

    bool memWrCheck;

    AddrRange ignoredAddrRange;

    bool cpuId;

    bool started;

    bool macroopInProgress;
};

} // namespace Trace

#endif // __ARCH_ARM_TRACERS_TARMAC_PARSER_HH__