T32SIM: Integrating Tracing feature of the T32SIM.

After each simulator break, T32Tracer retrieves the latest (16)
trace records from the T32. Memory address and value can now
be evaluated easily from the trace record.

TODO:Nevertheless we still have to traverse the trace to
find the instruction causing the access.

debuggers/t32/src/T32Tracer.cc

@@ -0,0 +1,66 @@
+#include "T32Tracer.hpp"
+#include "T32TraceFormat.hpp"
+#include <fstream>
+#include <iostream>
+#include "t32.h"
+
+using namespace std;
+
+namespace fail {
+
+  T32Tracer::T32Tracer( const std::string& tfile ) : path(tfile), m_log("T32Tracer", false) {
+  // TODO Check if tracing is available:
+    avail = true;
+    exportcmd = "Trace.export " + path;
+    m_log << "Trace file: " << path.c_str() << endl;
+  }
+
+
+  void T32Tracer::setup() const {
+    T32_Cmd("Trace.SIZE 16."); // trace 16 records
+    T32_Cmd("Trace.METHOD Analyzer");
+    T32_Cmd("Trace.autoarm on");
+    T32_Cmd("Trace.autoinit on");
+    T32_Cmd("Trace.state");
+  }
+
+  int T32Tracer::evaluate(){
+    // clear old records
+    rvec.clear();
+
+    // export trace to file
+    //T32_Cmd(static_cast<char*>(exportcmd.c_str()));
+    T32_Cmd((char*)(exportcmd.c_str()));
+    // open trace file.
+    ifstream tracefile;
+    tracefile.open(path.c_str(), ios::in | ios::binary);
+
+    if(tracefile.is_open()){
+      // evaluate trace.
+      T32TraceHeader hdr;
+      tracefile.seekg(0, ios::beg);
+      tracefile.read(reinterpret_cast<char*>(&hdr), sizeof(T32TraceHeader));
+
+      T32TraceRecord r;
+      for(size_t i = 0; i < hdr.number_of_records; ++i) {
+        tracefile.read(reinterpret_cast<char*>(&r), sizeof(T32TraceRecord));
+        rvec.push_back(r); // add trace record to vector
+      }
+      return rvec.size();
+    }
+    return -1;
+  }
+
+  bool T32Tracer::wasDataAccess(void) const {
+    // TODO if rvec.size() != 0 !!
+    return rvec.back().isDataAccess();
+  }
+
+
+  void T32Tracer::dump(void){
+    for(size_t i = 0; i < rvec.size(); ++i) {
+      m_log << "[" << dec << i << "] " << rvec[i] << endl;
+    }
+  }
+
+}; // end of namespace fail