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utils.cpp
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2009-2022, Intel Corporation
// written by Andrey Semin and many others
#include <array>
#include <iostream>
#include <cassert>
#include <climits>
#include <algorithm>
#ifdef _MSC_VER
#include <windows.h>
#include <accctrl.h>
#include <aclapi.h>
#include <sddl.h>
#include <process.h>
#include <comdef.h>
#else
#include <sys/wait.h> // for waitpid()
#include <unistd.h> // for ::sleep
#endif
#include "utils.h"
#include "cpucounters.h"
#include <numeric>
#ifndef _MSC_VER
#include <execinfo.h>
extern char ** environ;
#endif
#ifdef __linux__
#include <glob.h>
#endif
#include "debug.h"
namespace pcm {
bool startsWithPCM(const StringType& varName) {
const StringType prefix = PCM_STRING("PCM_");
return varName.compare(0, prefix.size(), prefix) == 0;
}
bool isInKeepList(const StringType& varName, const std::vector<StringType>& keepList) {
for (const auto& keepVar : keepList) {
if (varName == keepVar) {
return true;
}
}
return false;
}
void setDefaultDebugLevel()
{
auto strDebugLevel = pcm::safe_getenv("PCM_DEBUG_LEVEL");
if (strDebugLevel.empty() == false)
{
auto intDebugLevel = std::stoi(strDebugLevel);
debug::dyn_debug_level(intDebugLevel);
DBG(0, "Debug level set to ", intDebugLevel);
}
}
void getMCFGRecords(std::vector<MCFGRecord>& mcfg)
{
#ifdef __linux__
mcfg = PciHandleMM::getMCFGRecords();
#else
MCFGRecord segment;
segment.startBusNumber = 0;
segment.endBusNumber = 0xff;
auto maxSegments = 1;
#if defined (_MSC_VER) || defined(__FreeBSD__) || defined(__DragonFly__)
switch (PCM::getCPUFamilyModelFromCPUID())
{
case PCM::GNR:
maxSegments = 4;
break;
}
#endif
for (segment.PCISegmentGroupNumber = 0; segment.PCISegmentGroupNumber < maxSegments; ++(segment.PCISegmentGroupNumber))
{
mcfg.push_back(segment);
}
#endif
}
#if defined(_MSC_VER)
void eraseEnvironmentVariables(const std::vector<std::wstring>& keepList) {
// Get a snapshot of the current environment block
LPWCH envBlock = GetEnvironmentStrings();
if (!envBlock) {
std::cerr << "Error getting environment strings." << std::endl;
return;
}
// Iterate over the environment block
for (LPWCH var = envBlock; *var != 0; var += std::wcslen(var) + 1) {
std::wstring varName(var);
size_t pos = varName.find('=');
if (pos != std::string::npos) {
varName = varName.substr(0, pos);
if (!startsWithPCM(varName) && !isInKeepList(varName, keepList)) {
SetEnvironmentVariable(varName.c_str(), NULL);
}
}
}
// Free the environment block
FreeEnvironmentStrings(envBlock);
}
#else
void eraseEnvironmentVariables(const std::vector<std::string>& keepList) {
std::vector<std::string> varsToDelete;
// Collect all the variables that need to be deleted
for (char **env = environ; *env != nullptr; ++env) {
std::string envEntry(*env);
size_t pos = envEntry.find('=');
if (pos != std::string::npos) {
std::string varName = envEntry.substr(0, pos);
if (!startsWithPCM(varName) && !isInKeepList(varName, keepList)) {
varsToDelete.push_back(varName);
}
}
}
// Delete the collected variables
for (const auto& varName : varsToDelete) {
unsetenv(varName.c_str());
}
}
#endif
void (*post_cleanup_callback)(void) = NULL;
//! \brief handler of exit() call
void exit_cleanup(void)
{
std::cout << std::flush;
restore_signal_handlers();
// this replaces same call in cleanup() from util.h
if (PCM::isInitialized()) PCM::getInstance()->cleanup(); // this replaces same call in cleanup() from util.h
//TODO: delete other shared objects.... if any.
if(post_cleanup_callback != NULL)
{
post_cleanup_callback();
}
}
#ifdef _MSC_VER
bool colorEnabled = false;
#else
bool colorEnabled = true;
#endif
void setColorEnabled(bool value)
{
colorEnabled = value;
}
const char * setColor (const char * colorStr)
{
return colorEnabled ? colorStr : "";
}
template<typename T, typename... N>
constexpr auto make_array(N&&... args) -> std::array<T, sizeof...(args)>
{
return {std::forward<N>(args)...};
}
constexpr auto colorTable{make_array<const char*>(
ASCII_GREEN,
ASCII_YELLOW,
ASCII_MAGENTA,
ASCII_CYAN,
ASCII_BRIGHT_GREEN,
ASCII_BRIGHT_YELLOW,
ASCII_BRIGHT_BLUE,
ASCII_BRIGHT_MAGENTA,
ASCII_BRIGHT_CYAN,
ASCII_BRIGHT_WHITE
)};
size_t currentColor = 0;
const char * setNextColor()
{
const auto result = setColor(colorTable[currentColor++]);
if (currentColor == colorTable.size())
{
currentColor = 0;
}
return result;
}
const char * resetColor()
{
currentColor = 0;
return setColor(ASCII_RESET_COLOR);
}
void print_cpu_details()
{
const auto m = PCM::getInstance();
std::cerr << "\nDetected " << m->getCPUBrandString() << " \"Intel(r) microarchitecture codename " <<
m->getUArchCodename() << "\" stepping " << m->getCPUStepping();
const auto ucode_level = m->getCPUMicrocodeLevel();
if (ucode_level >= 0)
{
std::cerr << " microcode level 0x" << std::hex << ucode_level << std::dec;
}
std::cerr << "\n";
}
#ifdef __linux__
std::vector<std::string> findPathsFromPattern(const char* pattern)
{
std::vector<std::string> result;
glob_t glob_result;
memset(&glob_result, 0, sizeof(glob_result));
if (glob(pattern, GLOB_TILDE, nullptr, &glob_result) == 0)
{
for (size_t i = 0; i < glob_result.gl_pathc; ++i)
{
result.push_back(glob_result.gl_pathv[i]);
}
}
globfree(&glob_result);
return result;
};
#endif
#ifdef _MSC_VER
ThreadGroupTempAffinity::ThreadGroupTempAffinity(uint32 core_id, bool checkStatus, const bool restore_)
: restore(restore_)
{
GROUP_AFFINITY NewGroupAffinity;
SecureZeroMemory(&NewGroupAffinity, sizeof(GROUP_AFFINITY));
SecureZeroMemory(&PreviousGroupAffinity, sizeof(GROUP_AFFINITY));
DWORD currentGroupSize = 0;
while ((DWORD)core_id >= (currentGroupSize = GetActiveProcessorCount(NewGroupAffinity.Group)))
{
if (currentGroupSize == 0)
{
std::cerr << "ERROR: GetActiveProcessorCount for core " << core_id << " failed with error " << GetLastError() << "\n";
throw std::exception();
}
core_id -= (uint32)currentGroupSize;
++NewGroupAffinity.Group;
}
NewGroupAffinity.Mask = 1ULL << core_id;
if (GetThreadGroupAffinity(GetCurrentThread(), &PreviousGroupAffinity)
&& (std::memcmp(&NewGroupAffinity, &PreviousGroupAffinity, sizeof(GROUP_AFFINITY)) == 0))
{
restore = false;
return;
}
const auto res = SetThreadGroupAffinity(GetCurrentThread(), &NewGroupAffinity, &PreviousGroupAffinity);
if (res == FALSE && checkStatus)
{
std::cerr << "ERROR: SetThreadGroupAffinity for core " << core_id << " failed with error " << GetLastError() << "\n";
throw std::exception();
}
}
ThreadGroupTempAffinity::~ThreadGroupTempAffinity()
{
if (restore) SetThreadGroupAffinity(GetCurrentThread(), &PreviousGroupAffinity, NULL);
}
LONG unhandled_exception_handler(LPEXCEPTION_POINTERS p)
{
std::cerr << "DEBUG: Unhandled Exception event\n";
exit(EXIT_FAILURE);
}
/**
* \brief version of interrupt handled for Windows
*/
BOOL sigINT_handler(DWORD fdwCtrlType)
{
// output for DEBUG only
std::cerr << "DEBUG: caught signal to interrupt: ";
switch (fdwCtrlType)
{
// Handle the CTRL-C signal.
case CTRL_C_EVENT:
std::cerr << "Ctrl-C event\n";
break;
// CTRL-CLOSE: confirm that the user wants to exit.
case CTRL_CLOSE_EVENT:
std::cerr << "Ctrl-Close event\n";
break;
// Pass other signals to the next handler.
case CTRL_BREAK_EVENT:
std::cerr << "Ctrl-Break event\n";
break;
case CTRL_LOGOFF_EVENT:
std::cerr << "Ctrl-Logoff event\n";
break;
case CTRL_SHUTDOWN_EVENT:
std::cerr << "Ctrl-Shutdown event\n";
break;
default:
std::cerr << "Unknown event\n";
break;
}
// TODO: dump summary, if needed
// in case PCM is blocked just return and summary will be dumped in
// calling function, if needed
if (PCM::isInitialized() && PCM::getInstance()->isBlocked()) {
return FALSE;
} else {
exit_cleanup();
_exit(EXIT_SUCCESS);
return FALSE; // to prevent Warning
}
}
/**
* \brief started in a separate thread and blocks waiting for child application to exit.
* After child app exits: -> print Child's termination status and terminates PCM
*/
void waitForChild(void * proc_id)
{
intptr_t procHandle = (intptr_t)proc_id;
int termstat;
_cwait(&termstat, procHandle, _WAIT_CHILD);
std::cerr << "Program exited with status " << termstat << "\n";
exit(EXIT_SUCCESS);
}
#else
/**
* \brief handles signals that lead to termination of the program
* such as SIGINT, SIGQUIT, SIGABRT, SIGSEGV, SIGTERM, SIGCHLD
* this function specifically works when the client application launched
* by pcm -- terminates
*/
void sigINT_handler(int signum)
{
// output for DEBUG only
std::cerr << "DEBUG: caught signal to interrupt (" << strsignal(signum) << ").\n";
// TODO: dump summary, if needed
// in case PCM is blocked just return and summary will be dumped in
// calling function, if needed
if (PCM::isInitialized() && PCM::getInstance()->isBlocked()) {
return;
} else {
exit_cleanup();
if (signum == SIGABRT || signum == SIGSEGV)
{
_exit(EXIT_FAILURE);
}
else
{
_exit(EXIT_SUCCESS);
}
}
}
constexpr auto BACKTRACE_MAX_STACK_FRAME = 30;
void printBacktrace()
{
void* backtrace_buffer[BACKTRACE_MAX_STACK_FRAME] = { 0 };
char** backtrace_strings = NULL;
size_t backtrace_size = 0;
backtrace_size = backtrace(backtrace_buffer, BACKTRACE_MAX_STACK_FRAME);
backtrace_strings = backtrace_symbols(backtrace_buffer, backtrace_size);
if (backtrace_strings == NULL)
{
std::cerr << "Debug: backtrace empty. \n";
}
else
{
std::cerr << "Debug: backtrace dump(" << backtrace_size << " stack frames).\n";
for (size_t i = 0; i < backtrace_size; i++)
{
std::cerr << backtrace_strings[i] << "\n";
}
freeAndNullify(backtrace_strings);
}
}
/**
* \brief handles SIGSEGV signals that lead to termination of the program
* this function specifically works when the client application launched
* by pcm -- terminates
*/
void sigSEGV_handler(int signum)
{
printBacktrace();
sigINT_handler(signum);
}
/**
* \brief handles signals that lead to restart the application
* such as SIGHUP.
* for example to re-read environment variables controlling PCM execution
*/
void sigHUP_handler(int /*signum*/)
{
// output for DEBUG only
std::cerr << "DEBUG: caught signal to hangup. Reloading configuration and continue...\n";
// TODO: restart; so far do nothing
return; // continue program execution
}
/**
* \brief handles signals that lead to update of configuration
* such as SIGUSR1 and SIGUSR2.
* for the future extensions
*/
void sigUSR_handler(int /*signum*/)
{
std::cerr << "DEBUG: caught USR signal. Continue.\n";
// TODO: reload configurationa, reset accumulative counters;
return;
}
/**
* \brief handles signals that lead to update of configuration
* such as SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU
*/
void sigSTOP_handler(int /*signum*/)
{
PCM * m = PCM::getInstance();
int runState = m->getRunState();
std::string state = (runState == 1 ? "suspend" : "continue");
std::cerr << "DEBUG: caught signal to " << state << " execution.\n"; // debug of signals only
if (runState == 1) {
// stop counters and sleep... almost forever;
m->setRunState(0);
sleep(INT_MAX);
} else {
// resume
m->setRunState(1);
alarm(1);
}
return;
}
/**
* \brief handles signals that lead to update of configuration
* such as SIGCONT
*/
void sigCONT_handler(int /*signum*/)
{
std::cout << "DEBUG: caught signal to continue execution.\n"; // debug of signals only
// TODO: clear counters, resume counting.
return;
}
#endif // ifdef _MSC_VER
//! \brief install various handlers for system signals
void set_signal_handlers(void)
{
if (atexit(exit_cleanup) != 0)
{
std::cerr << "ERROR: Failed to install exit handler.\n";
return;
}
#ifdef _MSC_VER
BOOL handlerStatus;
// Increase the priority a bit to improve context switching delays on Windows
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
// to fix Cygwin/BASH setting Ctrl+C handler need first to restore the default one
handlerStatus = SetConsoleCtrlHandler(NULL, FALSE); // restores normal processing of CTRL+C input
if (handlerStatus == 0) {
tcerr << "Failed to set Ctrl+C handler. Error code: " << GetLastError() << " ";
const TCHAR * errorStr = _com_error(GetLastError()).ErrorMessage();
if (errorStr) tcerr << errorStr;
tcerr << "\n";
_exit(EXIT_FAILURE);
}
handlerStatus = SetConsoleCtrlHandler((PHANDLER_ROUTINE)sigINT_handler, TRUE);
if (handlerStatus == 0) {
tcerr << "Failed to set Ctrl+C handler. Error code: " << GetLastError() << " ";
const TCHAR * errorStr = _com_error(GetLastError()).ErrorMessage();
if (errorStr) tcerr << errorStr;
tcerr << "\n";
_exit(EXIT_FAILURE);
}
SetUnhandledExceptionFilter((LPTOP_LEVEL_EXCEPTION_FILTER)&unhandled_exception_handler);
char *envPath;
if (_dupenv_s(&envPath, NULL, "_"))
{
std::cerr << "\nPCM ERROR: _dupenv_s failed.\n";
_exit(EXIT_FAILURE);
}
if (envPath)
{
std::cerr << "\nPCM ERROR: Detected cygwin/mingw environment which does not allow to setup PMU clean-up handlers on Ctrl-C and other termination signals.\n";
std::cerr << "See https://www.mail-archive.com/cygwin@cygwin.com/msg74817.html\n";
std::cerr << "As a workaround please run pcm directly from a native windows shell (e.g. cmd).\n";
std::cerr << "Exiting...\n\n";
freeAndNullify(envPath);
_exit(EXIT_FAILURE);
}
freeAndNullify(envPath);
std::cerr << "DEBUG: Setting Ctrl+C done.\n";
#else
struct sigaction saINT, saHUP, saUSR, saSTOP, saCONT;
// install handlers that interrupt execution
saINT.sa_handler = sigINT_handler;
sigemptyset(&saINT.sa_mask);
saINT.sa_flags = SA_RESTART;
sigaction(SIGINT, &saINT, NULL);
sigaction(SIGQUIT, &saINT, NULL);
sigaction(SIGABRT, &saINT, NULL);
sigaction(SIGTERM, &saINT, NULL);
saINT.sa_flags = SA_RESTART | SA_NOCLDSTOP;
sigaction(SIGCHLD, &saINT, NULL); // get there is our child exits. do nothing if it stopped/continued
saINT.sa_handler = sigSEGV_handler;
sigemptyset(&saINT.sa_mask);
saINT.sa_flags = SA_RESTART;
sigaction(SIGSEGV, &saINT, NULL);
// install SIGHUP handler to restart
saHUP.sa_handler = sigHUP_handler;
sigemptyset(&saHUP.sa_mask);
saHUP.sa_flags = SA_RESTART;
sigaction(SIGHUP, &saHUP, NULL);
// install SIGHUP handler to restart
saUSR.sa_handler = sigUSR_handler;
sigemptyset(&saUSR.sa_mask);
saUSR.sa_flags = SA_RESTART;
sigaction(SIGUSR1, &saUSR, NULL);
sigaction(SIGUSR2, &saUSR, NULL);
// install SIGSTOP handler: pause/resume
saSTOP.sa_handler = sigSTOP_handler;
sigemptyset(&saSTOP.sa_mask);
saSTOP.sa_flags = SA_RESTART;
sigaction(SIGSTOP, &saSTOP, NULL);
sigaction(SIGTSTP, &saSTOP, NULL);
sigaction(SIGTTIN, &saSTOP, NULL);
sigaction(SIGTTOU, &saSTOP, NULL);
// install SIGCONT & SIGALRM handler
saCONT.sa_handler = sigCONT_handler;
sigemptyset(&saCONT.sa_mask);
saCONT.sa_flags = SA_RESTART;
sigaction(SIGCONT, &saCONT, NULL);
sigaction(SIGALRM, &saCONT, NULL);
#endif
return;
}
//! \brief Restores default signal handlers under Linux/UNIX
void restore_signal_handlers(void)
{
#ifndef _MSC_VER
struct sigaction action;
action.sa_handler = SIG_DFL;
action.sa_flags = 0;
sigemptyset(&action.sa_mask);
sigaction(SIGINT, &action, NULL);
sigaction(SIGQUIT, &action, NULL);
sigaction(SIGABRT, &action, NULL);
sigaction(SIGTERM, &action, NULL);
sigaction(SIGSEGV, &action, NULL);
sigaction(SIGCHLD, &action, NULL);
// restore SIGHUP handler to restart
sigaction(SIGHUP, &action, NULL);
// restore SIGHUP handler to restart
sigaction(SIGUSR1, &action, NULL);
sigaction(SIGUSR2, &action, NULL);
// restore SIGSTOP handler: pause/resume
// sigaction(SIGSTOP, &action, NULL); // cannot catch this
// handle SUSP character: normally C-z)
sigaction(SIGTSTP, &action, NULL);
sigaction(SIGTTIN, &action, NULL);
sigaction(SIGTTOU, &action, NULL);
// restore SIGCONT & SIGALRM handler
sigaction(SIGCONT, &action, NULL);
sigaction(SIGALRM, &action, NULL);
#endif
return;
}
void set_real_time_priority(const bool & silent)
{
if (!silent)
{
std::cerr << "Setting real time priority for the process\n";
}
#ifdef _MSC_VER
if (!SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS))
{
std::cerr << "ERROR: SetPriorityClass with REALTIME_PRIORITY_CLASS failed with error " << GetLastError() << "\n";
}
if (!SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL))
{
std::cerr << "ERROR: SetThreadPriority with THREAD_PRIORITY_TIME_CRITICAL failed with error " << GetLastError() << "\n";
}
#elif __linux__
const auto priority = sched_get_priority_max(SCHED_RR);
if (priority == -1)
{
std::cerr << "ERROR: Could not get SCHED_RR max priority: " << strerror(errno) << "\n";
}
else
{
struct sched_param sp = { .sched_priority = priority };
if (sched_setscheduler(0, SCHED_RR, &sp) == -1)
{
const auto errnosave = errno;
std::cerr << "ERROR: Could not set scheduler to realtime! Errno: " << errnosave << " Error message: \"" << strerror(errnosave) << "\"\n";
}
else
{
if (!silent)
{
std::cerr << "Scheduler changed to SCHED_RR and priority to " << priority << "\n";
}
}
}
#else
std::cerr << "Setting real time priority for the process not implemented on your OS.\n";
#endif
}
void set_post_cleanup_callback(void(*cb)(void))
{
post_cleanup_callback = cb;
}
//!\brief launches external program in a separate process
void MySystem(char * sysCmd, char ** sysArgv)
{
if (sysCmd == NULL) {
assert("No program provided. NULL pointer");
exit(EXIT_FAILURE);
}
std::cerr << "\nExecuting \"";
std::cerr << sysCmd;
std::cerr << "\" command:\n";
#ifdef _MSC_VER
intptr_t ret;
char cbuf[128];
if (PCM::getInstance()->isBlocked()) { // synchronous start: wait for child process completion
// in case PCM should be blocked waiting for the child application to end
// 1. returns and ret = -1 in case of error creating process is encountered
// 2.
ret = _spawnvp(_P_WAIT, sysCmd, sysArgv);
if (ret == -1) { // process creation failed.
strerror_s(cbuf, 128, errno);
std::cerr << "Failed to start program \"" << sysCmd << "\". " << cbuf << "\n";
exit(EXIT_FAILURE);
} else { // process created, worked, and completed with exist code in ret. ret=0 -> Success
std::cerr << "Program exited with status " << ret << "\n";
}
} else { // async start: PCM works in parallel with the child process, and exits when
ret = _spawnvp(_P_NOWAIT, sysCmd, sysArgv);
if (ret == -1) {
strerror_s(cbuf, 128, errno);
std::cerr << "Failed to start program \"" << sysCmd << "\". " << cbuf << "\n";
exit(EXIT_FAILURE);
} else { // ret here is the new process handle.
// start new thread which will wait for child completion, and continue PCM's execution
if (_beginthread(waitForChild, 0, (void *)ret) == -1L) {
strerror_s(cbuf, 128, errno);
std::cerr << "WARNING: Failed to set waitForChild. PCM will continue infinitely: finish it manually! " << cbuf << "\n";
}
}
}
#else
pid_t child_pid = fork();
if (child_pid == 0) {
execvp(sysCmd, sysArgv);
std::cerr << "Failed to start program \"" << sysCmd << "\"\n";
exit(EXIT_FAILURE);
}
else
{
if (PCM::getInstance()->isBlocked()) {
int res;
waitpid(child_pid, &res, 0);
std::cerr << "Program " << sysCmd << " launched with PID: " << std::dec << child_pid << "\n";
if (WIFEXITED(res)) {
std::cerr << "Program exited with status " << WEXITSTATUS(res) << "\n";
}
else if (WIFSIGNALED(res)) {
std::cerr << "Process " << child_pid << " was terminated with status " << WTERMSIG(res) << "\n";
}
}
}
#endif
}
#ifdef _MSC_VER
#define HORIZONTAL char(196)
#define VERTICAL char(179)
#define DOWN_AND_RIGHT char(218)
#define DOWN_AND_LEFT char(191)
#define UP_AND_RIGHT char(192)
#define UP_AND_LEFT char(217)
#else
#define HORIZONTAL u8"\u2500"
#define VERTICAL u8"\u2502"
#define DOWN_AND_RIGHT u8"\u250C"
#define DOWN_AND_LEFT u8"\u2510"
#define UP_AND_RIGHT u8"\u2514"
#define UP_AND_LEFT u8"\u2518"
#endif
template <class T>
void drawBar(const int nempty, const T & first, const int width, const T & last)
{
for (int c = 0; c < nempty; ++c)
{
std::cout << ' ';
}
std::cout << first;
for (int c = 0; c < width; ++c)
{
std::cout << HORIZONTAL;
}
std::cout << last << '\n';
}
void drawStackedBar(const std::string & label, std::vector<StackedBarItem> & h, const int width)
{
int real_width = 0;
auto scale = [&width](double fraction)
{
return int(round(fraction * double(width)));
};
for (const auto & i : h)
{
real_width += scale(i.fraction);
}
if (real_width > 2*width)
{
std::cout << "ERROR: sum of fractions > 2 ("<< real_width << " > " << width << ")\n";
return;
}
drawBar((int)label.length(), DOWN_AND_RIGHT, real_width, DOWN_AND_LEFT);
std::cout << label << VERTICAL;
for (const auto & i : h)
{
const int c_width = scale(i.fraction);
for (int c = 0; c < c_width; ++c)
{
std::cout << i.fill;
}
}
std::cout << VERTICAL << "\n";
drawBar((int)label.length(), UP_AND_RIGHT, real_width, UP_AND_LEFT);
}
bool CheckAndForceRTMAbortMode(const char * arg, PCM * m)
{
if (check_argument_equals(arg, {"-force-rtm-abort-mode"}))
{
if (nullptr == m)
{
m = PCM::getInstance();
assert(m);
}
m->enableForceRTMAbortMode();
return true;
}
return false;
}
std::vector<std::string> split(const std::string & str, const char delim)
{
std::string token;
std::vector<std::string> result;
std::istringstream strstr(str);
while (std::getline(strstr, token, delim))
{
result.push_back(token);
}
return result;
}
uint64 read_number(const char* str)
{
std::istringstream stream(str);
if (strstr(str, "x")) stream >> std::hex;
uint64 result = 0;
stream >> result;
return result;
}
// emulates scanf %i for hex 0x prefix otherwise assumes dec (no oct support)
bool match(const std::string& subtoken, const std::string& sname, uint64* result)
{
if (pcm_sscanf(subtoken) >> s_expect(sname + "0x") >> std::hex >> *result)
return true;
if (pcm_sscanf(subtoken) >> s_expect(sname) >> std::dec >> *result)
return true;
return false;
}
#define PCM_CALIBRATION_INTERVAL 50 // calibrate clock only every 50th iteration
int calibratedSleep(const double delay, const char* sysCmd, const MainLoop& mainLoop, PCM* m)
{
static uint64 TimeAfterSleep = 0;
int delay_ms = int(delay * 1000);
if (TimeAfterSleep) delay_ms -= (int)(m->getTickCount() - TimeAfterSleep);
if (delay_ms < 0) delay_ms = 0;
if (sysCmd == NULL || mainLoop.getNumberOfIterations() != 0 || m->isBlocked() == false)
{
if (delay_ms > 0)
{
DBG(1, "sleeping for " , std::dec , delay_ms , " ms...");
MySleepMs(delay_ms);
}
}
TimeAfterSleep = m->getTickCount();
return delay_ms;
};
void print_help_force_rtm_abort_mode(const int alignment, const char * separator)
{
if (PCM::isForceRTMAbortModeAvailable() == false)
{
return;
}
try
{
const auto m = PCM::getInstance();
if (m->getMaxCustomCoreEvents() < 4)
{
std::cout << " -force-rtm-abort-mode";
for (int i = 0; i < (alignment - 23); ++i)
{
std::cout << " ";
}
assert(separator);
std::cout << separator << " force RTM transaction abort mode to enable more programmable counters\n";
}
}
catch (std::exception & e)
{
std::cerr << "ERROR: " << e.what() << "\n";
}
catch (...)
{
std::cerr << "ERROR: Unknown exception caught in print_help_force_rtm_abort_mode\n";
}
}
#ifdef _MSC_VER
std::string safe_getenv(const char* env)
{
char * buffer;
std::string result;
if (_dupenv_s(&buffer, NULL, env) == 0 && buffer != nullptr)
{
result = buffer;
freeAndNullify(buffer);
}
return result;
}
#else
std::string safe_getenv(const char* env)
{
const auto getenvResult = std::getenv(env);
return getenvResult ? std::string(getenvResult) : std::string("");
}
#endif
void print_pid_collection_message(int pid)
{
if (pid != -1)
{
std::cerr << "Collecting core metrics for process ID " << std::dec << pid << "\n";
}
}
double parse_delay(const char *arg, const std::string& progname, print_usage_func print_usage_func)
{
// any other options positional that is a floating point number is treated as <delay>,
// while the other options are ignored with a warning issues to stderr
double delay_input = 0.0;
std::istringstream is_str_stream(arg);
is_str_stream >> std::noskipws >> delay_input;
if(is_str_stream.eof() && !is_str_stream.fail())
{
if (delay_input < 0)
{
std::cerr << "Invalid delay specified: \"" << *arg << "\". Delay should be positive.\n";
if(print_usage_func)
{
print_usage_func(progname);
}
exit(EXIT_FAILURE);
}
return delay_input;
}
else
{
std::cerr << "WARNING: unknown command-line option: \"" << *arg << "\". Ignoring it.\n";
if(print_usage_func)
{
print_usage_func(progname);
}
exit(EXIT_FAILURE);
}
}
std::list<int> extract_integer_list(const char *optarg){
const char *pstr = optarg;
std::list<int> corelist;
std::string snum1, snum2;
std::string *pnow = &snum1;
char nchar = ',';
while(*pstr != '\0' || nchar != ','){
nchar = ',';
if (*pstr != '\0'){
nchar = *pstr;
pstr++;
}
//printf("c=%c\n",nchar);
if (nchar=='-' && pnow == &snum1 && snum1.size()>0){
pnow = &snum2;
}else if (nchar == ','){
if (!snum1.empty() && !snum2.empty()){
int num1 = atoi(snum1.c_str()), num2 =atoi(snum2.c_str());
if (num2 < num1) std::swap(num1,num2);
if (num1 < 0) num1 = 0;
for (int ix=num1; ix <= num2; ix++){
corelist.push_back(ix);
}
}else if (!snum1.empty()){
int num1 = atoi(snum1.c_str());
corelist.push_back(num1);
}
snum1.clear();
snum2.clear();
pnow = &snum1;
}else if (nchar != ' '){
pnow->push_back(nchar);
}
}
return(corelist);
}
bool extract_argument_value(const char* arg, std::initializer_list<const char*> arg_names, std::string& value)
{
const auto arg_len = strlen(arg);
for (const auto& arg_name: arg_names) {
const auto arg_name_len = strlen(arg_name);
if (arg_len > arg_name_len && strncmp(arg, arg_name, arg_name_len) == 0 && arg[arg_name_len] == '=') {
value = arg + arg_name_len + 1;
const auto last_pos = value.find_last_not_of("\"");
if (last_pos != std::string::npos) {
value.erase(last_pos + 1);
}
const auto first_pos = value.find_first_not_of("\"");
if (first_pos != std::string::npos) {
value.erase(0, first_pos);
}