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Session.cpp
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// Copyright 2020 Western Digital Corporation or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Copyright 2024 Tenstorrent Corporation or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <fstream>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/mman.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <unistd.h>
#include <dlfcn.h>
#include <csignal>
#include "Session.hpp"
#include "HartConfig.hpp"
#include "Hart.hpp"
#include "Server.hpp"
#include "Interactive.hpp"
#if !defined(SOL_TCP) && defined(IPPROTO_TCP)
#define SOL_TCP IPPROTO_TCP
#endif
using namespace WdRiscv;
using StringVec = std::vector<std::string>;
template <typename URV>
Session<URV>::Session()
{
}
template <typename URV>
std::shared_ptr<System<URV>>
Session<URV>::defineSystem(const Args& args, const HartConfig& config)
{
// Collect primary configuration parameters.
unsigned hartsPerCore = 1;
unsigned coreCount = 1;
size_t pageSize = UINT64_C(4)*1024;
size_t memorySize = size_t(1) << 32; // 4 gigs
if (not getPrimaryConfigParameters(args, config, hartsPerCore, coreCount,
pageSize, memorySize))
return nullptr;
checkAndRepairMemoryParams(memorySize, pageSize);
if (args.hexFiles.empty() and args.expandedTargets.empty()
and args.binaryFiles.empty() and args.kernelFile.empty()
and args.loadFrom.empty()
#ifdef LZ4_COMPRESS
and args.lz4Files.empty()
#endif
and not args.interactive and not args.instList)
{
std::cerr << "No program file specified.\n";
return nullptr;
}
// Create cores & harts.
unsigned hartIdOffset = hartsPerCore;
config.getHartIdOffset(hartIdOffset);
if (hartIdOffset < hartsPerCore)
{
std::cerr << "Invalid core_hart_id_offset: " << hartIdOffset
<< ", must be greater than harts_per_core: " << hartsPerCore << '\n';
return nullptr;
}
system_ = std::make_shared<System<URV>> (coreCount, hartsPerCore, hartIdOffset,
memorySize, pageSize);
assert(system_ -> hartCount() == coreCount*hartsPerCore);
assert(system_ -> hartCount() > 0);
return system_;
}
template <typename URV>
bool
Session<URV>::configureSystem(const Args& args, const HartConfig& config)
{
if (not system_)
return false;
auto& system = *system_;
// Configure harts. Define callbacks for non-standard CSRs.
bool userMode = args.isa.find_first_of("uU") != std::string::npos;
if (not config.configHarts(system, userMode, args.verbose))
if (not args.interactive)
return false;
// Configure memory.
if (not config.configMemory(system, args.unmappedElfOk))
return false;
if (not args.pciDevs.empty())
if (not system.addPciDevices(args.pciDevs))
return false;
if (not args.dataLines.empty())
system.enableDataLineTrace(args.dataLines);
if (not args.instrLines.empty())
system.enableInstructionLineTrace(args.instrLines);
bool newlib = false, linux = false;
checkForNewlibOrLinux(args, newlib, linux);
bool clib = newlib or linux;
bool updateMisa = clib and not config.hasCsrConfig("misa");
std::string isa;
if (not determineIsa(config, args, clib, isa))
return false;
if (not openUserFiles(args))
return false;
for (unsigned i = 0; i < system.hartCount(); ++i)
{
auto& hart = *(system_ -> ithHart(i));
hart.setConsoleOutput(consoleOut_);
hart.enableBasicBlocks(bblockFile_, args.bblockInsts);
hart.enableNewlib(newlib);
hart.enableLinux(linux);
if (not isa.empty())
if (not hart.configIsa(isa, updateMisa))
return false;
hart.reset();
}
// This needs Smaia extension to be enabled.
if (not config.applyImsicConfig(system))
return false;
for (unsigned i = 0; i < system.hartCount(); ++i)
if (not applyCmdLineArgs(args, *system.ithHart(i), config, clib))
if (not args.interactive)
return false;
if (not args.loadFrom.empty())
if (not system.loadSnapshot(args.loadFrom, args.loadFromTrace))
return false;
#if 0
if (linux and checkForOpenMp(args))
{
if (args.verbose)
std::cerr << "Found OpenMP in executable. To emulate clone, we suspend "
"all harts other than hart 0.\n";
for (unsigned i = 1; i < system.hartCount(); ++i)
{
auto& hart = *system.ithHart(i);
hart.setSuspendState(true);
}
}
#endif
// Set instruction count limit.
if (args.instCountLim)
for (unsigned i = 0; i < system.hartCount(); ++i)
{
auto& hart = *system.ithHart(i);
uint64_t count = args.relativeInstCount? hart.getInstructionCount() : 0;
count += *args.instCountLim;
hart.setInstructionCountLimit(count);
}
if (args.retInstCountLim)
for (unsigned i = 0; i < system.hartCount(); ++i)
{
auto& hart = *system.ithHart(i);
uint64_t count = args.relativeInstCount? hart.getRetiredInstructionCount() : 0;
count += *args.retInstCountLim;
hart.setRetiredInstructionCountLimit(count);
}
if (not args.initStateFile.empty())
{
if (system.hartCount() > 1)
{
std::cerr << "Initial line-state report (--initstate) valid only when hart count is 1\n";
return false;
}
auto& hart0 = *system.ithHart(0);
hart0.setInitialStateFile(initStateFile_);
}
return true;
}
template <typename URV>
bool
Session<URV>::getPrimaryConfigParameters(const Args& args, const HartConfig& config,
unsigned& hartsPerCore, unsigned& coreCount,
size_t& pageSize, size_t& memorySize)
{
config.getHartsPerCore(hartsPerCore);
if (args.hasHarts)
hartsPerCore = args.harts;
if (hartsPerCore == 0 or hartsPerCore > 32)
{
std::cerr << "Unsupported hart count: " << hartsPerCore;
std::cerr << " (1 to 32 currently supported)\n";
return false;
}
config.getCoreCount(coreCount);
if (args.hasCores)
coreCount = args.cores;
if (coreCount == 0 or coreCount > 32)
{
std::cerr << "Unsupported core count: " << coreCount;
std::cerr << " (1 to 32 currently supported)\n";
return false;
}
// Determine simulated memory size. Default to 4 gigs.
// If running a 32-bit machine (pointer size = 32 bits), try 2 gigs.
if (memorySize == 0)
memorySize = size_t(1) << 31; // 2 gigs
config.getMemorySize(memorySize);
if (args.memorySize)
memorySize = *args.memorySize;
if (not config.getPageSize(pageSize))
pageSize = args.pageSize;
return true;
}
template <typename URV>
bool
Session<URV>::checkAndRepairMemoryParams(size_t& memSize, size_t& pageSize)
{
bool ok = true;
unsigned logPageSize = static_cast<unsigned>(std::log2(pageSize));
size_t p2PageSize = size_t(1) << logPageSize;
if (p2PageSize != pageSize)
{
std::cerr << "Memory page size (0x" << std::hex << pageSize << ") "
<< "is not a power of 2 -- using 0x" << p2PageSize << '\n'
<< std::dec;
pageSize = p2PageSize;
ok = false;
}
if (pageSize < 64)
{
std::cerr << "Page size (" << pageSize << ") is less than 64. Using 64.\n";
pageSize = 64;
ok = false;
}
if (memSize < pageSize)
{
std::cerr << "Memory size (0x" << std::hex << memSize << ") "
<< "smaller than page size (0x" << pageSize << ") -- "
<< "using 0x" << pageSize << " as memory size\n" << std::dec;
memSize = pageSize;
ok = false;
}
size_t pageCount = memSize / pageSize;
if (pageCount * pageSize != memSize)
{
size_t newSize = (pageCount + 1) * pageSize;
if (newSize == 0)
newSize = (pageCount - 1) * pageSize; // Avoid overflow
std::cerr << "Memory size (0x" << std::hex << memSize << ") is not a "
<< "multiple of page size (0x" << pageSize << ") -- "
<< "using 0x" << newSize << '\n' << std::dec;
memSize = newSize;
ok = false;
}
return ok;
}
template<typename URV>
bool
Session<URV>::openUserFiles(const Args& args)
{
traceFiles_.resize(system_ -> hartCount());
unsigned ix = 0;
for (auto& traceFile : traceFiles_)
{
size_t len = args.traceFile.size();
doGzip_ = len > 3 and args.traceFile.substr(len-3) == ".gz";
if (not args.traceFile.empty())
{
std::string name = args.traceFile;
if (args.logPerHart)
{
if (not doGzip_)
name.append(std::to_string(ix));
else
name.insert(len - 3, std::to_string(ix));
}
if ((ix == 0) || args.logPerHart)
{
if (doGzip_)
{
std::string cmd = "/usr/bin/gzip -c > ";
cmd += name;
traceFile = popen(cmd.c_str(), "w");
}
else
traceFile = fopen(name.c_str(), "w");
}
else
traceFile = traceFiles_.at(0); // point the same File pointer to each hart
if (not traceFile)
{
std::cerr << "Failed to open trace file '" << name
<< "' for output\n";
return false;
}
}
if (args.trace and traceFile == nullptr)
traceFile = stdout;
++ix;
}
if (not args.commandLogFile.empty())
{
commandLog_ = fopen(args.commandLogFile.c_str(), "w");
if (not commandLog_)
{
std::cerr << "Failed to open command log file '"
<< args.commandLogFile << "' for output\n";
return false;
}
setlinebuf(commandLog_); // Make line-buffered.
}
consoleOut_ = stdout;
if (not args.consoleOutFile.empty())
{
consoleOut_ = fopen(args.consoleOutFile.c_str(), "w");
if (not consoleOut_)
{
std::cerr << "Failed to open console output file '"
<< args.consoleOutFile << "' for output\n";
return false;
}
}
if (not args.bblockFile.empty())
{
bblockFile_ = fopen(args.bblockFile.c_str(), "w");
if (not bblockFile_)
{
std::cerr << "Failed to open basic block file '"
<< args.bblockFile << "' for output\n";
return false;
}
}
if (not args.initStateFile.empty())
{
initStateFile_ = fopen(args.initStateFile.c_str(), "w");
if (not initStateFile_)
{
std::cerr << "Failed to open init state file '"
<< args.initStateFile << "' for output\n";
return false;
}
}
return true;
}
template<typename URV>
void
Session<URV>::closeUserFiles()
{
if (consoleOut_ and consoleOut_ != stdout)
fclose(consoleOut_);
consoleOut_ = nullptr;
FILE* prev = nullptr;
for (auto& traceFile : traceFiles_)
{
if (traceFile and traceFile != stdout and traceFile != prev)
{
if (doGzip_)
pclose(traceFile);
else
fclose(traceFile);
}
prev = traceFile;
traceFile = nullptr;
}
if (commandLog_ and commandLog_ != stdout)
fclose(commandLog_);
commandLog_ = nullptr;
if (bblockFile_ and bblockFile_ != stdout)
fclose(bblockFile_);
bblockFile_ = nullptr;
if (initStateFile_ and initStateFile_ != stdout)
fclose(initStateFile_);
initStateFile_ = nullptr;
}
template<typename URV>
void
Session<URV>::checkForNewlibOrLinux(const Args& args, bool& newlib, bool& linux)
{
if (args.raw)
{
if (args.newlib or args.linux)
std::cerr << "Raw mode not compatible with newlib/linux. Sticking"
<< " with raw mode.\n";
return;
}
newlib = args.newlib;
linux = args.linux;
if (linux or newlib)
return; // Emulation preference already set by user.
for (auto target : args.expandedTargets)
{
auto elfPath = target.at(0);
if (not linux)
linux = (Memory::isSymbolInElfFile(elfPath, "__libc_early_init") or
Memory::isSymbolInElfFile(elfPath, "__dladdr"));
if (not newlib)
newlib = Memory::isSymbolInElfFile(elfPath, "__call_exitprocs");
if (linux and newlib)
break;
}
if (linux and args.verbose)
std::cerr << "Detected Linux symbol in ELF\n";
if (newlib and args. verbose)
std::cerr << "Detected Newlib symbol in ELF\n";
if (newlib and linux)
{
std::cerr << "Fishy: Both Newlib and Linux symbols present in "
<< "ELF file(s). Doing Linux emulation.\n";
newlib = false;
}
}
template<typename URV>
bool
Session<URV>::checkForOpenMp(const Args& args)
{
bool foundOpenMp = false;
for (auto target : args.expandedTargets)
{
auto elfPath = target.at(0);
foundOpenMp = Memory::isSymbolInElfFile(elfPath, "gomp_init_num_threads");
if (foundOpenMp)
break;
}
return foundOpenMp;
}
template<typename URV>
bool
Session<URV>::determineIsa(const HartConfig& config, const Args& args, bool clib,
std::string& isa)
{
isa.clear();
if (not args.isa.empty() and args.elfisa)
std::cerr << "Warning: Both --isa and --elfisa present: Using --isa\n";
isa = args.isa;
if (isa.empty() and args.elfisa)
if (not getElfFilesIsaString(args, isa))
return false;
if (isa.empty())
{
// No command line ISA. Use config file.
config.getIsa(isa);
}
if (isa.empty() and clib)
{
if (args.verbose)
std::cerr << "No ISA specified, using i/m/a/c/f/d/v extensions for newlib/linux\n";
isa = "imcafdv";
}
if (isa.empty() and not args.raw)
{
if (args.verbose)
std::cerr << "No ISA specified: Defaulting to imac\n";
isa = "imacfd";
}
return true;
}
template<typename URV>
bool
Session<URV>::getElfFilesIsaString(const Args& args, std::string& isaString)
{
StringVec archTags;
unsigned errors = 0;
for (const auto& target : args.expandedTargets)
{
const auto& elfFile = target.front();
if (not Memory::collectElfRiscvTags(elfFile, archTags))
errors++;
}
if (archTags.empty())
return errors == 0;
const std::string& ref = archTags.front();
for (const auto& tag : archTags)
if (tag != ref)
std::cerr << "Warning different ELF files have different ISA strings: "
<< tag << " and " << ref << '\n';
isaString = ref;
if (args.verbose)
std::cerr << "ISA string from ELF file(s): " << isaString << '\n';
return errors == 0;
}
/// Set stack pointer to a reasonable value for Linux/Newlib.
template<typename URV>
static
void
sanitizeStackPointer(Hart<URV>& hart, bool verbose)
{
// Set stack pointer to the 128 bytes below end of memory.
size_t memSize = hart.getMemorySize();
if (memSize > 128)
{
size_t spValue = memSize - 128;
if (verbose)
std::cerr << "Setting stack pointer to 0x" << std::hex << spValue
<< std::dec << " for newlib/linux\n";
hart.pokeIntReg(IntRegNumber::RegSp, spValue);
}
}
/// Apply register initialization specified on the command line.
template<typename URV>
static
bool
applyCmdLineRegInit(const Args& args, Hart<URV>& hart)
{
bool ok = true;
URV hartIx = hart.sysHartIndex();
for (const auto& regInit : args.regInits)
{
// Each register initialization is a string of the form reg=val or hart:reg=val
std::vector<std::string> tokens;
boost::split(tokens, regInit, boost::is_any_of("="), boost::token_compress_on);
if (tokens.size() != 2)
{
std::cerr << "Invalid command line register initialization: " << regInit << '\n';
ok = false;
continue;
}
std::string regName = tokens.at(0);
const std::string& regVal = tokens.at(1);
bool specificHart = false;
unsigned ix = 0;
size_t colonIx = regName.find(':');
if (colonIx != std::string::npos)
{
std::string hartStr = regName.substr(0, colonIx);
regName = regName.substr(colonIx + 1);
if (not Args::parseCmdLineNumber("hart", hartStr, ix))
{
std::cerr << "Invalid command line register initialization: " << regInit << '\n';
ok = false;
continue;
}
specificHart = true;
}
URV val = 0;
if (not Args::parseCmdLineNumber("register", regVal, val))
{
ok = false;
continue;
}
if (specificHart and ix != hartIx)
continue;
unsigned reg = 0;
Csr<URV>* csr = nullptr;
if (hart.findIntReg(regName, reg))
hart.pokeIntReg(reg, val);
else if (hart.findFpReg(regName, reg))
hart.pokeFpReg(reg, val);
else if ((csr = hart.findCsr(regName)) != nullptr)
hart.pokeCsr(csr->getNumber(), val);
else
{
std::cerr << "Invalid --setreg register: " << regName << '\n';
ok = false;
continue;
}
if (args.verbose)
std::cerr << "Setting register " << regName << " to command line "
<< "value 0x" << std::hex << val << std::dec << '\n';
}
return ok;
}
template<typename URV>
bool
Session<URV>::applyCmdLineArgs(const Args& args, Hart<URV>& hart,
const HartConfig& config, bool clib)
{
unsigned errors = 0;
auto& system = *system_;
if (clib) // Linux or Newlib enabled.
sanitizeStackPointer(hart, args.verbose);
if (args.toHostSym)
system.setTohostSymbol(*args.toHostSym);
if (args.consoleIoSym)
system.setConsoleIoSymbol(*args.consoleIoSym);
// Load ELF/HEX/binary files. Entry point of first ELF file sets the start PC unless in
// raw mode.
if (hart.sysHartIndex() == 0)
{
StringVec paths;
for (const auto& target : args.expandedTargets)
paths.push_back(target.at(0));
uint64_t offset = 0;
#ifdef LZ4_COMPRESS
if (not system.loadLz4Files(args.lz4Files, offset, args.verbose))
errors++;
#endif
if (not system.loadElfFiles(paths, args.raw, args.verbose))
errors++;
if (not system.loadHexFiles(args.hexFiles, args.verbose))
errors++;
if (not system.loadBinaryFiles(args.binaryFiles, offset, args.verbose))
errors++;
if (not args.kernelFile.empty())
{
// Default kernel file offset. FIX: make a parameter.
StringVec files{args.kernelFile};
offset = hart.isRv64() ? 0x80200000 : 0x80400000;
if (not system.loadBinaryFiles(files, offset, args.verbose))
errors++;
}
}
if (not args.instFreqFile.empty())
hart.enableInstructionFrequency(true);
if (args.clint)
{
uint64_t swAddr = *args.clint, size = 0xc000;
config.configAclint(system, hart, swAddr, size, swAddr, 0 /* swOffset */, true /* hasMswi */,
0x4000 /* timeCmpOffset */, 0xbff8 /* timeOffset */, true /* hasMtimer */);
}
uint64_t window = 1000000;
if (args.branchWindow)
window = *args.branchWindow;
if (not args.branchTraceFile.empty())
hart.traceBranches(args.branchTraceFile, window);
if (args.logStart)
hart.setLogStart(*args.logStart);
if (args.logPerHart or (system.hartCount() == 1))
hart.setOwnTrace(args.logPerHart or (system.hartCount() == 1));
if (not args.loadFrom.empty())
{
if (not args.stdoutFile.empty() or not args.stderrFile.empty() or
not args.stdinFile.empty())
std::cerr << "Info: Options --stdin/--stdout/--stderr are ignored with --loadfrom\n";
}
else
{
if (not args.stdoutFile.empty())
if (not hart.redirectOutputDescriptor(STDOUT_FILENO, args.stdoutFile))
errors++;
if (not args.stderrFile.empty())
if (not hart.redirectOutputDescriptor(STDERR_FILENO, args.stderrFile))
errors++;
if (not args.stdinFile.empty())
if (not hart.redirectInputDescriptor(STDIN_FILENO, args.stdinFile))
errors++;
}
if (args.instCounter)
hart.setInstructionCount(*args.instCounter);
// Command line to-host overrides that of ELF and config file.
if (args.toHost)
hart.setToHostAddress(*args.toHost);
if (args.fromHost)
hart.setFromHostAddress(*args.fromHost, true);
// We turn off fromhost when interactive mode is used.
if (args.interactive)
hart.setFromHostAddress(0, false);
// Command-line entry point overrides that of ELF.
if (args.startPc)
{
hart.defineResetPc(*args.startPc);
hart.pokePc(URV(*args.startPc));
}
// Command-line exit point overrides that of ELF.
if (args.endPc)
hart.setStopAddress(URV(*args.endPc));
// Command-line console io address overrides config file.
if (args.consoleIo)
hart.setConsoleIo(URV(*args.consoleIo));
hart.enableConsoleInput(! args.noConInput);
if (args.tracePtw)
hart.tracePtw(true);
// Setup periodic external interrupts.
if (args.alarmInterval)
{
// Convert from micro-seconds to processor ticks. Assume a 1
// ghz-processor.
uint64_t ticks = (*args.alarmInterval)*1000;
hart.setupPeriodicTimerInterrupts(ticks);
}
if (args.triggers)
hart.enableSdtrig(*args.triggers);
hart.enableGdb(args.gdb);
if (args.gdbTcpPort.size()>hart.sysHartIndex())
hart.setGdbTcpPort(args.gdbTcpPort[hart.sysHartIndex()]);
if (args.counters)
hart.enablePerformanceCounters(args.counters);
if (args.abiNames)
hart.enableAbiNames(args.abiNames);
// Apply register initialization.
if (not applyCmdLineRegInit(args, hart))
errors++;
// Setup target program arguments.
if (not args.expandedTargets.empty())
{
if (clib)
{
if (args.loadFrom.empty())
if (not hart.setTargetProgramArgs(args.expandedTargets.front(), args.envVars))
{
size_t memSize = hart.memorySize();
size_t suggestedStack = memSize - 4;
std::cerr << "Failed to setup target program arguments -- stack "
<< "is not writable\n"
<< "Try using --setreg sp=<val> to set the stack pointer "
<< "to a\nwritable region of memory (e.g. --setreg "
<< "sp=0x" << std::hex << suggestedStack << '\n'
<< std::dec;
errors++;
}
}
else if (args.expandedTargets.front().size() > 1 or not args.envVars.empty())
{
std::cerr << "Warning: Target program options or env vars present which requires\n"
<< " the use of --newlib/--linux. Options ignored.\n";
}
}
if (args.csv)
hart.enableCsvLog(args.csv);
if (args.logStart)
hart.setLogStart(*args.logStart);
if (args.mcm)
{
unsigned mcmLineSize = 64;
config.getMcmLineSize(mcmLineSize);
if (args.mcmls)
mcmLineSize = *args.mcmls;
bool checkAll = false;
config.getMcmCheckAll(checkAll);
if (args.mcmca)
checkAll = true;
if (args.noPpo)
{
if (not system.enableMcm(mcmLineSize, checkAll, false /*enablePpos*/))
errors++;
}
else
{
std::vector<unsigned> enabledPpos;
if (not config.getEnabledPpos(enabledPpos))
errors++;
else if (not system.enableMcm(mcmLineSize, checkAll, enabledPpos))
errors++;
}
}
if (args.steesr.size() == 2)
{
uint64_t low = args.steesr.at(0), high = args.steesr.at(1);
if ((low % hart.pageSize()) != 0 or (high % hart.pageSize()) != 0)
{
std::cerr << "Warning: STEE secure region bounds are not page aligned\n";
low -= low % hart.pageSize();
high -= high % hart.pageSize();
std::cerr << "Warning: STEE secure region bounds changed to: [0x" << std::hex
<< low << ", " << high << "]\n" << std::dec;
}
hart.configSteeSecureRegion(args.steesr.at(0), args.steesr.at(1));
}
if (args.perfApi)
{
if (not system.enablePerfApi(traceFiles_))
errors++;
if (not args.interactive and commandLog_)
system.perfApiCommandLog(commandLog_);
}
if (not args.snapshotPeriods.empty())
{
auto periods = args.snapshotPeriods;
std::sort(periods.begin(), periods.end());
if (std::find(periods.begin(), periods.end(), 0)
!= periods.end())
{
std::cerr << "Snapshot periods of 0 are ignored\n";
periods.erase(std::remove(periods.begin(), periods.end(), 0), periods.end());
}
auto it = std::unique(periods.begin(), periods.end());
if (it != periods.end())
{
periods.erase(it, periods.end());
std::cerr << "Duplicate snapshot periods not supported, removed duplicates\n";
}
}
if (not args.snapshotDir.empty())
system.setSnapshotDir(args.snapshotDir);
if (args.tlbSize)
{
size_t size = *args.tlbSize;
if ((size & (size-1)) != 0)
{
std::cerr << "TLB size must be a power of 2\n";
errors++;
}
else
hart.setTlbSize(size);
}
if (args.nmiVec)
hart.defineNmiPc(*args.nmiVec);
if (args.nmeVec)
hart.defineNmiExceptionPc(*args.nmeVec);
if (args.hintOps)
hart.enableHintOps(args.hintOps);
return errors == 0;
}
template<typename URV>
bool
Session<URV>::runServer(const std::string& serverFile)
{
auto& system = *system_;
auto traceFile = traceFiles_.at(0);
auto commandLog = commandLog_;
std::array<char, 1024> hostName = {};
if (gethostname(hostName.data(), hostName.size()) != 0)
{
std::cerr << "Failed to obtain name of this computer\n";
return false;
}
int soc = socket(AF_INET, SOCK_STREAM, 0);
if (soc < 0)
{
std::array<char, 512> buffer;
char* p = buffer.data();
#ifdef __APPLE__
strerror_r(errno, buffer.data(), buffer.size());
#else
p = strerror_r(errno, buffer.data(), buffer.size());
#endif
std::cerr << "Failed to create socket: " << p << '\n';
return -1;
}
int one = 1;
setsockopt(soc, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
sockaddr_in serverAddr;
memset(&serverAddr, 0, sizeof(serverAddr));