Added BasicBlock- and CallRegionPruner

Implemented two instantiations of Fault-Space Regions (FSR) as a program-structure-guided approximation of fault spaces based on the precise Def/Use-Pruning using basic blocks or function calls.

Further reading:
Program-Structure-Guided Approximation of Large Fault Spaces
Oskar Pusz and Daniel Kiechle and Christian Dietrich and Daniel Lohmann
In: 24th Pacific Rim International Symposium on Dependable Computing (PRDC'19)
IEEE Computer Science Press, 2019

Some configurations for bochs and generic-experiment

tools/prune-trace/CallRegionPruner.hpp

@@ -0,0 +1,35 @@
+#ifndef __CALL_REGION_PRUNER_H__
+#define __CALL_REGION_PRUNER_H__
+
+#include "BasicBlockPruner.hpp"
+#include <list>
+#include "util/ProtoStream.hpp"
+#include "util/gzstream/gzstream.h"
+#include "comm/TracePlugin.pb.h"
+#include "sal/SALConfig.hpp"
+#include <tuple>
+#include <string>
+
+class CallRegionPruner : public BasicBlockPruner {
+public:
+    CallRegionPruner() : BasicBlockPruner() {
+        LOG.setDescription("CallRegionPruner");
+    }
+    virtual ~CallRegionPruner() {};
+
+    virtual std::string method_name() { return std::string("call-region"); }
+    void getAliases(std::deque<std::string> *aliases) {
+        aliases->push_back("CallRegionPruner");
+        aliases->push_back("call-region");
+    }
+
+protected:
+    /*  Import objectdump to find jumps */
+    virtual bool importObjdump(const variant_t &variant);
+
+    // list of instructions: PC -> is a call or ret instruction
+    std::set<static_instr_t> call_or_ret;
+
+    virtual bool inSameRegion(static_instr_t previous, static_instr_t next);
+};
+#endif