119 lines
5.1 KiB
C++
119 lines
5.1 KiB
C++
/*******************************************************************************
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* Copyright (C) 2017 - 2023, MINRES Technologies GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Contributors:
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* eyck@minres.com - initial API and implementation
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******************************************************************************/
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#include "cycle_estimate.h"
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#include <iss/arch_if.h>
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#include <util/logging.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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using namespace rapidjson;
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using namespace std;
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iss::plugin::cycle_estimate::cycle_estimate(string const& config_file_name)
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: instr_if(nullptr)
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, config_file_name(config_file_name)
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{
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}
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iss::plugin::cycle_estimate::~cycle_estimate() {
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}
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bool iss::plugin::cycle_estimate::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 (config_file_name.length() > 0) {
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ifstream is(config_file_name);
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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 " << config_file_name << ", 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 " << config_file_name;
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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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void iss::plugin::cycle_estimate::callback(instr_info_t instr_info) {
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assert(instr_if && "No instrumentation interface available but callback executed");
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auto entry = delays[instr_info.instr_id];
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bool taken = instr_if->is_branch_taken();
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if (taken && (entry.taken > 1))
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instr_if->update_last_instr_cycles(entry.taken);
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else if (entry.not_taken > 1)
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instr_if->update_last_instr_cycles(entry.not_taken);
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}
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