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Merge remote-tracking branch 'origin/Trace_enhancement' into develop

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Eyck Jentzsch 2022-05-30 14:18:09 +02:00
parent 52ed8b81a6 1720bd4aaa
commit 1c90fe765d
1 changed files with 180 additions and 0 deletions
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src/plugin/pctrace.cpp Normal file
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#include <iss/arch_if.h>
#include <iss/plugin/pctrace.h>
#include <util/logging.h>
#include <util/ities.h>
#include <rapidjson/document.h>
#include <rapidjson/istreamwrapper.h>
#include "rapidjson/writer.h"
#include "rapidjson/stringbuffer.h"
#include <rapidjson/ostreamwrapper.h>
#include <rapidjson/error/en.h>
#include <fstream>
#include <iostream>
#ifdef WITH_LZ4
#include <lz4frame.h>
#endif
namespace iss {
namespace plugin {
using namespace rapidjson;
using namespace std;
#ifdef WITH_LZ4
class lz4compress_steambuf: public std::streambuf {
public:
lz4compress_steambuf(const lz4compress_steambuf&) = delete;
lz4compress_steambuf& operator=(const lz4compress_steambuf&) = delete;
lz4compress_steambuf(std::ostream &sink, size_t buf_size)
: sink(sink)
, src_buf(buf_size)
, dest_buf(LZ4F_compressBound(buf_size, nullptr))
{
auto errCode = LZ4F_createCompressionContext(&ctx, LZ4F_VERSION);
if (LZ4F_isError(errCode) != 0)
throw std::runtime_error(std::string("Failed to create LZ4 context: ") + LZ4F_getErrorName(errCode));
size_t ret = LZ4F_compressBegin(ctx, &dest_buf.front(), dest_buf.capacity(), nullptr);
if (LZ4F_isError(ret) != 0)
throw std::runtime_error(std::string("Failed to start LZ4 compression: ") + LZ4F_getErrorName(ret));
setp(src_buf.data(), src_buf.data() + src_buf.size() - 1);
sink.write(dest_buf.data(), ret);
}
~lz4compress_steambuf() {
close();
}
void close() {
if (closed)
return;
sync();
auto ret = LZ4F_compressEnd(ctx, dest_buf.data(), dest_buf.capacity(), nullptr);
if (LZ4F_isError(ret) != 0)
throw std::runtime_error(std::string("Failed to finish LZ4 compression: ") + LZ4F_getErrorName(ret));
sink.write(dest_buf.data(), ret);
LZ4F_freeCompressionContext(ctx);
closed = true;
}
private:
int_type overflow(int_type ch) override {
compress_and_write();
*pptr() = static_cast<char_type>(ch);
pbump(1);
return ch;
}
int_type sync() override {
compress_and_write();
return 0;
}
void compress_and_write() {
if (closed)
throw std::runtime_error("Cannot write to closed stream");
if(auto orig_size = pptr() - pbase()){
auto ret = LZ4F_compressUpdate(ctx, dest_buf.data(), dest_buf.capacity(), pbase(), orig_size, nullptr);
if (LZ4F_isError(ret) != 0)
throw std::runtime_error(std::string("LZ4 compression failed: ") + LZ4F_getErrorName(ret));
if(ret) sink.write(dest_buf.data(), ret);
pbump(-orig_size);
}
}
std::ostream &sink;
std::vector<char> src_buf;
std::vector<char> dest_buf;
LZ4F_compressionContext_t ctx{ nullptr };
bool closed{ false };
};
#endif
cov::cov(std::string const &filename)
: instr_if(nullptr)
, filename(filename)
, output("output.trc")
#ifdef WITH_LZ4
, strbuf(new lz4compress_steambuf(output, 4096))
, ostr(strbuf.get())
#endif
{ }
cov::~cov() { }
bool cov::registration(const char *const version, vm_if& vm) {
instr_if = vm.get_arch()->get_instrumentation_if();
if(!instr_if) return false;
const string core_name = instr_if->core_type_name();
if (filename.length() > 0) {
ifstream is(filename);
if (is.is_open()) {
try {
IStreamWrapper isw(is);
Document d;
ParseResult ok = d.ParseStream(isw);
if(ok) {
Value& val = d[core_name.c_str()];
if(val.IsArray()){
delays.reserve(val.Size());
for (auto it = val.Begin(); it != val.End(); ++it) {
auto& name = (*it)["name"];
auto& size = (*it)["size"];
auto& delay = (*it)["delay"];
auto& branch = (*it)["branch"];
if(delay.IsArray()) {
auto dt = delay[0].Get<unsigned>();
auto dnt = delay[1].Get<unsigned>();
delays.push_back(instr_desc{size.Get<unsigned>(), dt, dnt, branch.Get<bool>()});
} else if(delay.Is<unsigned>()) {
auto d = delay.Get<unsigned>();
delays.push_back(instr_desc{size.Get<unsigned>(), d, d, branch.Get<bool>()});
} else
throw runtime_error("JSON parse error");
}
} else {
LOG(ERR)<<"plugin cycle_estimate: could not find an entry for "<<core_name<<" in JSON file"<<endl;
return false;
}
} else {
LOG(ERR)<<"plugin cycle_estimate: could not parse in JSON file at "<< ok.Offset()<<": "<<GetParseError_En(ok.Code())<<endl;
return false;
}
} catch (runtime_error &e) {
LOG(ERR) << "Could not parse input file " << filename << ", reason: " << e.what();
return false;
}
} else {
LOG(ERR) << "Could not open input file " << filename;
return false;
}
}
return true;
}
void cov::callback(instr_info_t iinfo, const exec_info& einfo) {
auto delay = 0;
size_t id = iinfo.instr_id;
auto entry = delays[id];
auto instr = instr_if->get_instr_word();
auto call = id==65 || id ==86 || ((id==2 || id==3) && bit_sub<7,5>(instr)!=0) ;//not taking care of tail calls (jalr with loading x6)
bool taken = einfo.branch_taken;
bool compressed = (instr&0x3)!=0x3;
if (einfo.branch_taken) {
delay = entry.taken;
if(entry.taken > 1)
instr_if->set_curr_instr_cycles(entry.taken);
} else {
delay = entry.not_taken;
if (entry.not_taken > 1)
instr_if->set_curr_instr_cycles(entry.not_taken);
}
#ifndef WITH_LZ4
output<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<<","<<(compressed?2:4) <<"\n";
#else
auto rdbuf=ostr.rdbuf();
ostr<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<<","<<(compressed?2:4) <<"\n";
#endif
}
}
}