cpu/exetrace.hh

   1 /*
   2  * Copyright (c) 2001-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef __EXETRACE_HH__
  30 #define __EXETRACE_HH__
  31
  32 #include <fstream>
  33 #include <vector>
  34
  35 #include "sim/host.hh"
  36 #include "cpu/inst_seq.hh"      // for InstSeqNum
  37 #include "base/trace.hh"
  38 #include "cpu/exec_context.hh"
  39 #include "cpu/static_inst.hh"
  40
  41 class BaseCPU;
  42
  43
  44 namespace Trace {
  45
  46 class InstRecord : public Record
  47 {
  48   protected:
  49
  50     // The following fields are initialized by the constructor and
  51     // thus guaranteed to be valid.
  52     BaseCPU *cpu;
  53     // need to make this ref-counted so it doesn't go away before we
  54     // dump the record
  55     StaticInstPtr<TheISA> staticInst;
  56     Addr PC;
  57     bool misspeculating;
  58     unsigned thread;
  59
  60     // The remaining fields are only valid for particular instruction
  61     // types (e.g, addresses for memory ops) or when particular
  62     // options are enabled (e.g., tracing full register contents).
  63     // Each data field has an associated valid flag to indicate
  64     // whether the data field is valid.
  65     Addr addr;
  66     bool addr_valid;
  67
  68     union {
  69         uint64_t as_int;
  70         double as_double;
  71     } data;
  72     enum {
  73         DataInvalid = 0,
  74         DataInt8 = 1,   // set to equal number of bytes
  75         DataInt16 = 2,
  76         DataInt32 = 4,
  77         DataInt64 = 8,
  78         DataDouble = 3
  79     } data_status;
  80
  81     InstSeqNum fetch_seq;
  82     bool fetch_seq_valid;
  83
  84     InstSeqNum cp_seq;
  85     bool cp_seq_valid;
  86
  87     struct iRegFile {
  88         IntRegFile regs;
  89     };
  90     iRegFile *iregs;
  91     bool regs_valid;
  92
  93   public:
  94     InstRecord(Tick _cycle, BaseCPU *_cpu,
  95                const StaticInstPtr<TheISA> &_staticInst,
  96                Addr _pc, bool spec, int _thread)
  97         : Record(_cycle), cpu(_cpu), staticInst(_staticInst), PC(_pc),
  98           misspeculating(spec), thread(_thread)
  99     {
 100         data_status = DataInvalid;
 101         addr_valid = false;
 102         regs_valid = false;
 103
 104         fetch_seq_valid = false;
 105         cp_seq_valid = false;
 106     }
 107
 108     virtual ~InstRecord() { }
 109
 110     virtual void dump(std::ostream &outs);
 111
 112     void setAddr(Addr a) { addr = a; addr_valid = true; }
 113
 114     void setData(uint64_t d) { data.as_int = d; data_status = DataInt64; }
 115     void setData(uint32_t d) { data.as_int = d; data_status = DataInt32; }
 116     void setData(uint16_t d) { data.as_int = d; data_status = DataInt16; }
 117     void setData(uint8_t d) { data.as_int = d; data_status = DataInt8; }
 118
 119     void setData(int64_t d) { setData((uint64_t)d); }
 120     void setData(int32_t d) { setData((uint32_t)d); }
 121     void setData(int16_t d) { setData((uint16_t)d); }
 122     void setData(int8_t d)  { setData((uint8_t)d); }
 123
 124     void setData(double d) { data.as_double = d; data_status = DataDouble; }
 125
 126     void setFetchSeq(InstSeqNum seq)
 127     { fetch_seq = seq; fetch_seq_valid = true; }
 128
 129     void setCPSeq(InstSeqNum seq)
 130     { cp_seq = seq; cp_seq_valid = true; }
 131
 132     void setRegs(const IntRegFile &regs);
 133
 134     void finalize() { theLog.append(this); }
 135
 136     enum InstExecFlagBits {
 137         TRACE_MISSPEC = 0,
 138         PRINT_CYCLE,
 139         PRINT_OP_CLASS,
 140         PRINT_THREAD_NUM,
 141         PRINT_RESULT_DATA,
 142         PRINT_EFF_ADDR,
 143         PRINT_INT_REGS,
 144         PRINT_FETCH_SEQ,
 145         PRINT_CP_SEQ,
 146         INTEL_FORMAT,
 147         NUM_BITS
 148     };
 149
 150     static std::vector<bool> flags;
 151     static std::string trace_system;
 152
 153     static void setParams();
 154
 155     static bool traceMisspec() { return flags[TRACE_MISSPEC]; }
 156 };
 157
 158
 159 inline void
 160 InstRecord::setRegs(const IntRegFile &regs)
 161 {
 162     if (!iregs)
 163       iregs = new iRegFile;
 164
 165     memcpy(&iregs->regs, regs, sizeof(IntRegFile));
 166     regs_valid = true;
 167 }
 168
 169 inline
 170 InstRecord *
 171 getInstRecord(Tick cycle, ExecContext *xc, BaseCPU *cpu,
 172               const StaticInstPtr<TheISA> staticInst,
 173               Addr pc, int thread = 0)
 174 {
 175     if (DTRACE(InstExec) &&
 176         (InstRecord::traceMisspec() || !xc->misspeculating())) {
 177         return new InstRecord(cycle, cpu, staticInst, pc,
 178                               xc->misspeculating(), thread);
 179     }
 180
 181     return NULL;
 182 }
 183
 184
 185 }
 186
 187 #endif // __EXETRACE_HH__