137 lines
4.7 KiB
C++
137 lines
4.7 KiB
C++
#include <iss/arch_if.h>
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#include <iss/plugin/pctrace.h>
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#include <util/logging.h>
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#include <util/ities.h>
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#include <rapidjson/document.h>
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#include <rapidjson/istreamwrapper.h>
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#include "rapidjson/writer.h"
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#include "rapidjson/stringbuffer.h"
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#include <rapidjson/ostreamwrapper.h>
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#include <rapidjson/error/en.h>
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#include <fstream>
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#include <iostream>
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using namespace rapidjson;
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using namespace std;
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iss::plugin::cov::cov(std::string const &filename)
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: instr_if(nullptr)
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, filename(filename)
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{
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output.open("output.trc");
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jumped = false;
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first = true;
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}
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iss::plugin::cov::~cov() {
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output.close();
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}
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bool iss::plugin::cov::registration(const char *const version, vm_if& vm) {
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instr_if = vm.get_arch()->get_instrumentation_if();
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if(!instr_if) return false;
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const string core_name = instr_if->core_type_name();
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if (filename.length() > 0) {
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ifstream is(filename);
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if (is.is_open()) {
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try {
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IStreamWrapper isw(is);
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Document d;
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ParseResult ok = d.ParseStream(isw);
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if(ok) {
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Value& val = d[core_name.c_str()];
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if(val.IsArray()){
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delays.reserve(val.Size());
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for (auto it = val.Begin(); it != val.End(); ++it) {
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auto& name = (*it)["name"];
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auto& size = (*it)["size"];
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auto& delay = (*it)["delay"];
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auto& branch = (*it)["branch"];
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if(delay.IsArray()) {
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auto dt = delay[0].Get<unsigned>();
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auto dnt = delay[1].Get<unsigned>();
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delays.push_back(instr_desc{size.Get<unsigned>(), dt, dnt, branch.Get<bool>()});
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} else if(delay.Is<unsigned>()) {
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auto d = delay.Get<unsigned>();
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delays.push_back(instr_desc{size.Get<unsigned>(), d, d, branch.Get<bool>()});
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} else
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throw runtime_error("JSON parse error");
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}
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} else {
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LOG(ERR)<<"plugin cycle_estimate: could not find an entry for "<<core_name<<" in JSON file"<<endl;
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return false;
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}
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} else {
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LOG(ERR)<<"plugin cycle_estimate: could not parse in JSON file at "<< ok.Offset()<<": "<<GetParseError_En(ok.Code())<<endl;
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return false;
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}
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} catch (runtime_error &e) {
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LOG(ERR) << "Could not parse input file " << filename << ", reason: " << e.what();
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return false;
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}
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} else {
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LOG(ERR) << "Could not open input file " << filename;
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return false;
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}
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}
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return true;
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}
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inline string formatPC(uint64_t pc) {
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stringstream stream;
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stream << "0x" << std::hex << pc;
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return stream.str();
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}
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void iss::plugin::cov::callback(instr_info_t iinfo, const exec_info& einfo) {
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// auto delay = 0;
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// auto entry = delays[iinfo.instr_id];
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// bool taken = einfo.branch_taken;
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// if (einfo.branch_taken)
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// delay = entry.taken;
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// else
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// delay = entry.not_taken;
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//
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// if (first){
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// output << formatPC(instr_if->get_pc()) << "," << delay;
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// first = false;
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// }
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// if(instr_if->get_next_pc()-instr_if->get_pc() != delays[iinfo.instr_id].size/8){
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// //The goal is to keep the output in start-target pairs, so after a jump the target address needs to get written
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// //to the output. If the target happens to also be a start, we keep the pairing by adding a 0-delay entry.
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// if (jumped)
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// output <<"\n" <<formatPC(instr_if->get_pc()) << "," << 0;
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// output <<"\n" << formatPC(instr_if->get_pc()) << "," << delay;
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// jumped = true;
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// }
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// else{
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// if (jumped){
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// output <<"\n" << formatPC(instr_if->get_pc()) << "," << delay;
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// jumped = false;
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// }
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// else if(delay!=1){
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// output <<"\n" << formatPC(instr_if->get_pc()) << "," << delay;
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// output <<"\n" << formatPC(instr_if->get_pc()) << "," << 0;
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// }
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//
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// }
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//source code for the full output
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auto delay = 0;
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size_t id = iinfo.instr_id;
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auto entry = delays[id];
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auto call = (id==2 || id==3) && bit_sub<7,5>(instr_if->get_instr_word())!=0;
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bool taken = einfo.branch_taken;
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if (einfo.branch_taken)
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delay = entry.taken;
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else
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delay = entry.not_taken;
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output<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay << "\n";
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}
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