At first, I share my action and error reporting.
My action:
1. I added the following code to the TraCIDemo11p.cc file:
std::string edgeId ="1i";
traciVehicle->moveToXY(edgeId, 0,mobility->getCurrentPosition().x+2,mobility->getCurrentPosition().y,mobility->getAngleRad());
2. I added the following code to the TraCICommandInterface.cc file:
void TraCICommandInterface::Vehicle::moveToXY(std::string edgeId,int32_t laneid,double x,double y,double angle){
uint8_t variableId = CMD_MOVEXY;
uint8_t variableType = TYPE_COMPOUND;
int32_t count = 5;
uint8_t edgeType = TYPE_STRING;
uint8_t lanidType = TYPE_INTEGER;
uint8_t postionType = TYPE_DOUBLE;
uint8_t routeType = TYPE_BYTE;
uint8_t route = 1;
TraCIBuffer buf = connection->query(CMD_SET_VEHICLE_VARIABLE, TraCIBuffer() << variableId << nodeId << variableType <<
count <<edgeType << edgeId << lanidType << laneid << postionType << x << postionType << y <<postionType <<
angle << routeType << route );
ASSERT(buf.eof());
}
Error reporting:
Then, when I run the simulation of veins, the Traci Server gives the following error:
Error: Answered with error to command 0xc4: Wrong position in requestMessage after dispatching command. Expected command length was 61 but 59 Bytes were read.
Can anyone help me with how to solve this error?
Related
I'm trying to build multiple controllers. The original code that connect all switches to one controller is as follows:
void OFA_switch::connect()
{
socket.renewSocket();
int connectPort = par("connectPort");
/*
const char *connectAddress= par("connectAddress");
EV << "connectAddress = " << connectAddress << " connectPort =" << connectPort << endl;
if (getParentModule()->getParentModule()->getSubmodule("controller") != NULL)
{
// multiple controllers; full path is needed for connect address
connectAddress = (getParentModule()->getParentModule())->getSubmodule("controller")->getFullPath().c_str();
cModule *ctl = getSystemModule()->getSubmodule("controller");
if(ctl != NULL) {
EV << "ctl->getFullPath() = " << ctl->getFullPath().c_str() << endl;
connectAddress = ctl->getFullPath().c_str();
}
EV << "After: connectAddress = " << connectAddress << endl;
}
*/
L3Address ctlIPAddr;
EV << "connect L3Address = " << L3AddressResolver().tryResolve("controller", ctlIPAddr) << endl;
// EV << "result: connectAddress = " << ctlIPAddr << endl;
// socket.connect(L3AddressResolver().resolve(connectAddress), connectPort);
socket.connect(ctlIPAddr, connectPort);
}
I'm trying to make some switches connected to controller1 while the other switches connected to controller2, so I tried to adapt the following code to:
void My_OFA_switch::connect() {
socket.renewSocket();
int connectPort = par("connectPort");
const char *connectAddress = par("connectAddress");
EV << "connectAddress = " << connectAddress << " connectPort =" << connectPort << endl;
const char *connectAddr;
cModule *ctl;
if (strcmp (connectAddress, "controller1")==0)
{ connectAddr = (getParentModule())->getSubmodule("controller1")->getFullPath().c_str();
ctl = getSystemModule()->getSubmodule("controller1");
}
else if (strcmp (connectAddress, "controller2")==0)
{ connectAddr = (getParentModule())->getSubmodule("controller2")->getFullPath().c_str();
ctl = getSystemModule()->getSubmodule("controller2");
}
if(ctl != NULL) {
EV << "ctl->getFullPath() = " << ctl->getFullPath().c_str() << endl;
connectAddr = ctl->getFullPath().c_str();
}
L3Address ctlIPAddr;
EV << "connect L3Address = " << L3AddressResolver().tryResolve(connectAddr, ctlIPAddr) << endl;
socket.connect(ctlIPAddr, connectPort);
}
Also, there is a file Switch.cc which represents the controller behavior
"in ini file :
*.controller.behavior = "Switch" "that contain:
void Switch::initialize() {
cModule *ITModule =
getParentModule()->getSubmodule("ofa_controller");
controller = check_and_cast<OFA_controller *>(ITModule);
getParentModule()->subscribe("PacketIn",this); }
Should I change something here?
But when I run it the following runtime error appears and immediately close the simulation:
Simulation run has encountered a problem. Finished with error.
And in console it appeared:
Simulation terminated with exit code: -1073741819
Working directory: D:/omnet/OpenFlowOmnet/omnetpp-5.6.2-src-windows/omnetpp-5.6.2/myws/openflow/scenarios
Command line: ../openflow.exe -m -n ..;../../inet/src;../../inet/examples;../../inet/tutorials;../../inet/showcases --image-path=../images;../../inet/images -l ../../inet/src/INET My_2Domain_Ctrl.ini
Environment variables:
PATH=;D:/omnet/OpenFlowOmnet/omnetpp-5.6.2-src-windows/omnetpp-5.6.2/myws/inet/src;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\bin;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\mingw64\bin;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\usr\bin;;D:/omnet/OpenFlowOmnet/omnetpp-5.6.2-src-windows/omnetpp-5.6.2/ide/jre/bin/server;D:/omnet/OpenFlowOmnet/omnetpp-5.6.2-src-windows/omnetpp-5.6.2/ide/jre/bin;D:/omnet/OpenFlowOmnet/omnetpp-5.6.2-src-windows/omnetpp-5.6.2/ide/jre/lib/amd64;.;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\bin;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\mingw64\bin;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\usr\local\bin;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\usr\bin;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\usr\bin;C:\Windows\System32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\usr\bin\site_perl;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\usr\bin\vendor_perl;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\tools\win64\usr\bin\core_perl;D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2;
OMNETPP_ROOT=D:/omnet/OpenFlowOmnet/omnetpp-5.6.2-src-windows/omnetpp-5.6.2/
OMNETPP_IMAGE_PATH=D:\omnet\OpenFlowOmnet\omnetpp-5.6.2-src-windows\omnetpp-5.6.2\images
I really appreciate any guidance and help because I must do a lot of work and I'm running out of time.
enter image description here
One has to remember that strcmp() returns 0 if the contents of both strings are equal. And in C++ zero means false.
So if you want to do something when connectAddress is equal to "controller1", you should write:
if (strcmp (connectAddress, "controller1") == 0) {
// ...
}
Generally, in order to deal with a runtime exception in OMNeT++ do:
Set debug-on-errors=true in your omnetpp.ini.
Build the project in debug mode.
Start the simulation in debug (i.e. Run | Debug).
The simulation will stop in the line that causes an error and in the stack trace you may see the referenced calls.
Reference: Learn OMNeT++ with TicToc - Runtime errors
I have a code that I found on the internet that uses the function GetRawInputDeviceInfo, but it doesn't get the name of the device right. sometimes it doesn't get a name at all. I've searched for an answer and found out that people had this problem on windows XP and windows 7 to. I am using windows 10 so that doesn't really help me.
C++ - WinAPI get list of all connected USB devices (do i need to post the code itself? im new to stack overflow)
At the end of the day what I am trying to do is get the names of all the devices connected to my PC and print them out, but this function doesnt return the name of the mouse either, so if anyone has a suggestion on how to fix it or a better method to get the names Id'e love to hear you'r ideas. thanks in advance, -shon :)
EDIT2! the full code:
#include <windows.h>
#include <iostream>
#include <vector>
#include <string>
#include <set>
// Namespace
using namespace std;
// Main
int main()
{
// Program
cout << "USB Device Lister." << endl;
// Get Number Of Devices
UINT nDevices = 0;
GetRawInputDeviceList(NULL, &nDevices, sizeof(RAWINPUTDEVICELIST));
// Got Any?
if (nDevices < 1)
{
// Exit
cout << "ERR: 0 Devices?";
cin.get();
return 0;
}
// Allocate Memory For Device List
PRAWINPUTDEVICELIST pRawInputDeviceList;
pRawInputDeviceList = new RAWINPUTDEVICELIST[sizeof(RAWINPUTDEVICELIST) * nDevices];
// Got Memory?
if (pRawInputDeviceList == NULL)
{
// Error
cout << "ERR: Could not allocate memory for Device List.";
cin.get();
return 0;
}
// Fill Device List Buffer
int nResult;
nResult = GetRawInputDeviceList(pRawInputDeviceList, &nDevices, sizeof(RAWINPUTDEVICELIST));
// Got Device List?
if (nResult < 0)
{
// Clean Up
delete[] pRawInputDeviceList;
// Error
cout << "ERR: Could not get device list.";
cin.get();
return 0;
}
std::set<std::string> DeviceList;
// Loop Through Device List
for (UINT i = 0; i < nDevices; i++)
{
// Get Character Count For Device Name
UINT nBufferSize = 0;
nResult = GetRawInputDeviceInfo(pRawInputDeviceList[i].hDevice, // Device
RIDI_DEVICENAME, // Get Device Name
NULL, // NO Buff, Want Count!
&nBufferSize); // Char Count Here!
// Got Device Name?
if (nResult < 0)
{
// Error
cout << "ERR: Unable to get Device Name character count.. Moving to next device." << endl << endl;
// Next
continue;
}
// Allocate Memory For Device Name
WCHAR* wcDeviceName = new WCHAR[nBufferSize + 1];
// Got Memory
if (wcDeviceName == NULL)
{
// Error
cout << "ERR: Unable to allocate memory for Device Name.. Moving to next device." << endl << endl;
// Next
continue;
}
// Get Name
nResult = GetRawInputDeviceInfo(pRawInputDeviceList[i].hDevice, // Device
RIDI_DEVICENAME, // Get Device Name
wcDeviceName, // Get Name!
&nBufferSize); // Char Count
// Got Device Name?
if (nResult < 0)
{
// Error
cout << "ERR: Unable to get Device Name.. Moving to next device." << endl << endl;
// Clean Up
delete[] wcDeviceName;
// Next
continue;
}
// Set Device Info & Buffer Size
RID_DEVICE_INFO rdiDeviceInfo;
rdiDeviceInfo.cbSize = sizeof(RID_DEVICE_INFO);
nBufferSize = rdiDeviceInfo.cbSize;
// Get Device Info
nResult = GetRawInputDeviceInfo(pRawInputDeviceList[i].hDevice,
RIDI_DEVICEINFO,
&rdiDeviceInfo,
&nBufferSize);
// Got All Buffer?
if (nResult < 0)
{
// Error
cout << "ERR: Unable to read Device Info.. Moving to next device." << endl << endl;
// Next
continue;
}
// Mouse
if (rdiDeviceInfo.dwType == RIM_TYPEMOUSE)
{
// Current Device
int id = rdiDeviceInfo.mouse.dwId; //device id
string s = "ID: " + std::to_string(id) + ", Type : MOUSE"; //device type is mouse
DeviceList.insert(s);
}
// Keyboard
else if (rdiDeviceInfo.dwType == RIM_TYPEKEYBOARD)
{
// Current Device
cout << endl << "Displaying device " << i + 1 << " information. (KEYBOARD)" << endl;
wcout << L"Name " << wcDeviceName << endl; //*Problem is here!* //
cout << "Keyboard mode: " << rdiDeviceInfo.keyboard.dwKeyboardMode << endl;
cout << "Number of function keys: " << rdiDeviceInfo.keyboard.dwNumberOfFunctionKeys << endl;
cout << "Number of indicators: " << rdiDeviceInfo.keyboard.dwNumberOfIndicators << endl;
cout << "Number of keys total: " << rdiDeviceInfo.keyboard.dwNumberOfKeysTotal << endl;
cout << "Type of the keyboard: " << rdiDeviceInfo.keyboard.dwType << endl;
cout << "Subtype of the keyboard: " << rdiDeviceInfo.keyboard.dwSubType << endl;
}
// Some HID
else // (rdi.dwType == RIM_TYPEHID)
{
// Current Device
cout << endl << "Displaying device " << i + 1 << " information. (HID)" << endl;
wcout << L"Device Name: " << wcDeviceName << endl;
cout << "Vendor Id:" << rdiDeviceInfo.hid.dwVendorId << endl;
cout << "Product Id:" << rdiDeviceInfo.hid.dwProductId << endl;
cout << "Version No:" << rdiDeviceInfo.hid.dwVersionNumber << endl;
cout << "Usage for the device: " << rdiDeviceInfo.hid.usUsage << endl;
cout << "Usage Page for the device: " << rdiDeviceInfo.hid.usUsagePage << endl;
}
// Delete Name Memory!
delete[] wcDeviceName;
}
// Clean Up - Free Memory
delete[] pRawInputDeviceList;
for (std::set<string>::iterator i = DeviceList.begin(); i != DeviceList.end(); ++i)
std::cout << *i << '\n';
// Exit
cout << endl << "Finnished.";
cin.get();
return 0;
}
In Windows there are two flavors of API calls: Unicode and ANSI. The former takes and returns UTF-16 encoded Unicode strings; the latter takes and returns 8-bit encoded strings (the exact encoding depends on the OS localization).
You choose which flavor you want to use by #defining (or not #defining) the macro UNICODE. Depending on that the function changes name, with an W or A suffix.
#ifdef UNICODE
#define GetRawInputDeviceInfo GetRawInputDeviceInfoW
#else
#define GetRawInputDeviceInfo GetRawInputDeviceInfoA
#endif
All the structures that may contain text data are also duplicated with the W or A suffixes.
Now your problem: you are not defining UNICODE so you are actually calling GetRawInputDeviceInfoA(), the ANSI flavor, that expects a char*, but you are passing a WCHAR*, that is a UNICODE string!
The solution is easy:
char* wcDeviceName = new char[nBufferSize + 1];
It is unfortunate that this function GetRawInputDeviceInfo() has its arguments overloaded, so it is declared as taking a void*, so the compiler cannot catch the error. If you were calling a simpler function, say SetWindowText() then you would have got a compiler error because of incompatible pointer type.
If you really want the full UNICODE name of the device, you may prefer keep the WCHAR string and then call the UNICODE function specifically:
WCHAR* wcDeviceName = new WCHAR[nBufferSize + 1];
...
GetRawInputDeviceInfoW(..., RIDI_DEVICENAME, wcDeviceName, ...);
I'm currently using Omnet++, and veins, and I have this runtime error appearing suddenly, and I am not able to understand it in order to fix it properly.
Error in module (TraCIDemoRSU11p) RSUExampleScenario.rsu[0].appl
(id=8) at event #6180, t=53.956510612297: Array of size 220 indexed by
220.
TRAPPING on the exception above, due to a debug-on-errors=true configuration option. Is your debugger ready?
I am assuming that it might be related to this message I am sending from the RSU to the vehicles with this code, but I am not sure how it's related.
cplusplus {{
#include "veins/modules/messages/WaveShortMessage_m.h"
}}
class WaveShortMessage;
message DelayedFromControllerMessage extends WaveShortMessage {
string vehiclesList [220] ;
}
I am using omnet++ Version: 5.0 and Veins 4.4
Edited, I'm using the array in these places:
1-
void TraCIDemoRSU11p::sendDelayedMessage(std::list<const char *> vehicleList) {
sentDelayedMessage = true;
//vehicleList = {};
t_channel channel = dataOnSch ? type_SCH : type_CCH;
DelayedFromControllerMessage* dsm = prepareDelayedSM("delayed",dataLengthBits, channel, dataPriority, -1,2,vehicleList);
std::list<const char *>::iterator it = vehicleList.begin();
//const char * v;
char* vx = new char [100];
vx[0] = '\0';
for(int i=0; i<vehicleList.size(); i++){
//v =*it;
strcpy(vx,*it);
//vx = *it;
++it;
dsm->setVehiclesList(i, vx);
}
if (sendDelayedEvt->isScheduled()) {
cancelAndDelete(sendDelayedEvt);
}else {
delete sendDelayedEvt;
}
sendDelayedEvt = new cMessage("delayed evt", SEND_DELAYED_EVT); // create event object to use it in timing
simtime_t offSet = dblrand() * (par("beaconInterval").doubleValue());
TimeStart = simTime() + offSet;
scheduleAt(TimeStart, sendDelayedEvt);
sendDelayedSM(dsm);
}
2-
DelayedFromControllerMessage* BaseWaveApplLayer:: prepareDelayedSM(const char * name, int lengthBits, t_channel channel, int priority, int rcvId,int serial,std::list<const char *>vehicleList ) {
DelayedFromControllerMessage* dsm = new DelayedFromControllerMessage(name);
dsm->addBitLength(headerLength);
dsm->addBitLength(lengthBits);
switch (channel) {
case type_SCH: dsm->setChannelNumber(Channels::SCH1); break; //will be rewritten at Mac1609_4 to actual Service Channel. This is just so no controlInfo is needed
case type_CCH: dsm->setChannelNumber(Channels::CCH); break;
}
dsm->setPsid(0);
dsm->setPriority(priority);
dsm->setWsmVersion(1);
dsm->setTimestamp(simTime());
dsm->setSenderAddress(myId);
dsm->setRecipientAddress(rcvId);
dsm->setSenderPos(curPosition);
dsm->setSerial(serial);
std::list<const char *>::iterator it = vehicleList.begin();
const char * v;
for(int i=0; i<vehicleList.size(); i++){
v =*it;
++it;
VLvar1.push_back(v);
dsm->setVehiclesList(i, v);
}
if ((std::string)name == "beacon") {
DBG << "Creating Beacon with Priority " << priority << " at Applayer at " << dsm->getTimestamp() << std::endl;
}
if ((std::string)name == "delayed") {
DBG << "Creating Data with Priority " << priority << " at Applayer at " << dsm->getTimestamp() << std::endl;
}
return dsm;
}
3-
void MyTraCIDemo11p::onDataDelayed(DelayedFromControllerMessage* dsm) {
int x = 0;
std::string vehichleId = mobility->getExternalId();
for (int i=0 ; i < dsm->getVehiclesListArraySize();i++)
{
vehicleList.push_back(std::string(dsm->getVehiclesList(i)));
}
ttry = std::find(vehicleList.begin(), vehicleList.end(), vehichleId);
if (vehichleId == *ttry){
x = 1;
}
if (state == QUEUING && x == 1){
findHost()->bubble("Received ");
state = WAITING;
stateToString(state);
}
}
The message should be sent from the RSU to the vehicles.
Even without seeing the actual code from the application (appl) or from the configuration file you are using, I am guessing you are trying to get the last element (element 220) from the array.
The error message already tells what the problem is. Your array has a size of 220 and you are trying to use the index 220 which is not possible, since array indexes start at 0. Therefore for addressing the last element in your array, you have to use index 221.
I am not sure if this is the reason for your error:
ttry = std::find(vehicleList.begin(), vehicleList.end(), vehichleId);
if (vehichleId == *ttry){
x = 1;
}
But, It is better to write it this way:
if (std::find(vehicleList.begin(), vehicleList.end(), vehichleId) != vehicleList.end()){
x = 1;
}
I don't recommend referencing thefind iterator (i.e., *ttry) if it is not found, it is like referencing *(vehicleList.end()).
it seems to me you have two veichleList variables, an array in the dsm and another one which is a vector. is this correct? if yes, you should make sure that the veichleList.size() is always less or equal 220.
Check this tutorial to learn how to debug your project in omnet++:
https://docs.omnetpp.org/tutorials/tictoc/part2/
So i ended up finding a solution for this issue just now.
it was by doing this:
cplusplus {{
#include "veins/modules/messages/WaveShortMessage_m.h"
}}
class WaveShortMessage;
message DelayedFromControllerMessage extends WaveShortMessage {
string vehiclesList [] ;
}
=====
DelayedFromControllerMessage* BaseWaveApplLayer:: prepareDelayedSM(const char * name, int lengthBits, t_channel channel, int priority, int rcvId,int serial,std::list<const char *>vehicleList ) {
DelayedFromControllerMessage* dsm = new DelayedFromControllerMessage(name);
dsm->addBitLength(headerLength);
dsm->addBitLength(lengthBits);
switch (channel) {
case type_SCH: dsm->setChannelNumber(Channels::SCH1); break; //will be rewritten at Mac1609_4 to actual Service Channel. This is just so no controlInfo is needed
case type_CCH: dsm->setChannelNumber(Channels::CCH); break;
}
dsm->setPsid(0);
dsm->setPriority(priority);
dsm->setWsmVersion(1);
dsm->setTimestamp(simTime());
dsm->setSenderAddress(myId);
dsm->setRecipientAddress(rcvId);
dsm->setSenderPos(curPosition);
dsm->setSerial(serial);
int NS = 0;
std::list<const char *>::iterator itPD = vehicleList.begin();
const char * vPD;
int i0 = 0;
while(itPD != vehicleList.end()){
vPD = *itPD;
++itPD;
++NS;
dsm->setVehiclesListArraySize(NS);
dsm->setVehiclesList(i0, vPD);
++i0;
VLvar1.push_back(vPD);
}
if ((std::string)name == "beacon") {
DBG << "Creating Beacon with Priority " << priority << " at Applayer at " << dsm->getTimestamp() << std::endl;
}
if ((std::string)name == "delayed") {
DBG << "Creating Data with Priority " << priority << " at Applayer at " << dsm->getTimestamp() << std::endl;
}
return dsm;
}
I removed the array size and placed with a manual counter in BaseWaveApplLayer:: prepareDelayedSM using a while loop. I thought about posting the solution to help others when facing a similar problem. :)
I am using boost message queue to communicate among different processes. I am transmitting an object of type Packet. To do this, I am using serialization and deserialization in send and receive functions.
However, when I try to send the data, I am getting this error:
boost::interprocess_exception::library_error
No other information is given.
This is how I create message queues.
for(i = 0; i< PROC_MAX_E ; i++){
std::string mqName = std::string("mq") + std::to_string(i);
std::cout << " Size of Packet is " << sizeof(Packet) << std::endl;
message_queue mq(open_or_create, mqName.c_str(), MAX_QUEUE_SIZE_E, 100*sizeof(Packet)); // size of packet later
}
This is my Packet :
class Packet{
public :
Packet();
Packet(uint32_t aType, uint32_t aProcId);
~Packet();
uint32_t getType();
union{
uint32_t mFuncId;
//uint8_t mResult8;
uint32_t mResult32;
//uint64_t mResult64;
//bool mResult;
//uint8_t* mAddr8;
//uint32_t* mAddr32;
//uint64_t* mAddr64;
//char mData[MAX_PACKET_SIZE]; // This will be used to store serialized data
};
friend class boost::serialization::access;
template <class Archive>
void serialize(Archive & ar, const unsigned int version){
ar & _mType;
ar & _mProcId;
//ar & mData;
ar & mFuncId;
//ar & mResult32;
}
private :
uint32_t _mType;
uint32_t _mProcId;
}; // end class
} // end namespace
This is my serialize and deserialize functions:
std::string IPC::_serialize(Packet aPacket){
std::stringstream oss;
boost::archive::text_oarchive oa(oss);
oa << aPacket;
std::string serialized_string (oss.str());
return serialized_string;
}
Packet IPC::_deserialize(std::string aData){
Packet p;
std::stringstream iss;
iss << aData;
boost::archive::text_iarchive ia(iss);
ia >> p;
return p;
}
And this is my send and receive functions:
bool IPC::send(uint32_t aProcId, Packet aPacket){
try{
_mLogFile << "<-- Sending Data to Process : " << aProcId << std::endl;
//uint32_t data = aPacket;
std::string mqName = std::string("mq") + std::to_string(aProcId);
message_queue mq(open_only, mqName.c_str());
//serialize Packet
std::cout << "Serializing \n";
std::string data = _serialize(aPacket);
std::cout << " Serialized data =" << data.data() << "Size = " << data.size()<< std::endl;
mq.send(data.data(), data.size(), 0);
//mq.send(&data, sizeof(uint32_t), 0);
}catch(interprocess_exception &ex){
_mLogFile << "***ERROR*** in IPC Send to process : " << aProcId << " " << ex.what() << std::endl;
std::cout << "***ERROR*** in IPC Send to process : " << aProcId << " " << ex.what() << std::endl;
_ipc_exit();
}
}
I am getting exception during mq.send
When I transmit only integers it works fine. Only with serialization and deserialization, I get this error
Any help is greatly appreciated.I am a little stuck as the exception message is also not clear.
I am using boost 1_57_0
Rgds
Sapan
Try closing or flushing the string steam before using the string.
std::string IPC::_serialize(Packet aPacket){
std::stringstream oss;
{
boost::archive::text_oarchive oa(oss);
oa << aPacket;
}
return oss.str();
}
When trying to obtain the call stack of a thread of some process, I always get a single same frame, although it is for sure has more (at least 5 frames).
StackWalk64() always succeeds on the first call - return a frame with:
AddrPC.Offset = 18446744072850558156
But, immediately on the second call it fails with error id 998-ERROR_NOACCESS (it might be that this error is not because of this call, as MSDN says).
Moreover, trying to resolve this address into its symbol name with SymFromAddr() fails with error 126-ERROR_MOD_NOT_FOUND (after successful SymInitialize(m_processHandler,NULL,TRUE) call).
Here is the code:
#ifdef _M_IX86
//
// Disable global optimization and ignore /GS waning caused by
// inline assembly.
//
#pragma optimize( "g", off )
#pragma warning( push )
#pragma warning( disable : 4748 )
#endif
bool EchoProfiler::getThreadStackTrace(__in HANDLE h_thread, __out vector<DWORD64> &framesVec)
{
CONTEXT threadContext;
if (GetThreadContext(h_thread, &threadContext) == 0)
{
cout << "Error: GetThreadContext() failed with error ID " << GetLastError() << endl;
return false;
}
//initialize stack frame
DWORD MachineType;
STACKFRAME64 StackFrame;
ZeroMemory( &StackFrame, sizeof( STACKFRAME64 ) );
MachineType = IMAGE_FILE_MACHINE_I386;
StackFrame.AddrPC.Offset = threadContext.Eip;
StackFrame.AddrPC.Mode = AddrModeFlat;
StackFrame.AddrFrame.Offset = threadContext.Ebp;
StackFrame.AddrFrame.Mode = AddrModeFlat;
StackFrame.AddrStack.Offset = threadContext.Esp;
StackFrame.AddrStack.Mode = AddrModeFlat;
PVOID contextRec = (MachineType == IMAGE_FILE_MACHINE_I386) ? NULL : &threadContext;
int i=0;
// enumerate all the frames in the stack
for (i=1 ; ; i++)
{
if (StackWalk64( MachineType, targetProcessHandler, h_thread, &StackFrame,
contextRec, NULL, SymFunctionTableAccess64, SymGetModuleBase64, NULL ) == false)
{
// in case it failed or we have finished walking the stack.
cout << "Error: StackWalk64() failed with error ID " << GetLastError() << endl;
i--;
break;
// return false;
}
if ( StackFrame.AddrPC.Offset != 0 )
{
// Valid frame.
cout << "Frame #" << i << " address - " << StackFrame.AddrPC.Offset << endl;
framesVec.push_back(StackFrame.AddrPC.Offset);
}
else
{
// Base reached.
break;
}
}
//cout << "StackWalk64 found " << i << " stack frames:" << endl;
//i = 1;
//for (FramesConstItr itr=framesVec.begin() ; itr != framesVec.end() ; itr++ , i++)
// cout << i << " - " << *itr << endl;
return true;
}
#ifdef _M_IX86
#pragma warning( pop )
#pragma optimize( "g", on )
#endif
what could it be?
Solution:
I missed the part said that the context structure must be initialize properly.
Adding the following solved my problem:
memset(&threadContext, 0, sizeof(CONTEXT));
threadContext.ContextFlags = CONTEXT_FULL;
Thanks
For anyone running into this issue in the future, I also suffered from it in our own local codebase when getting stack information from a different process to the current one. The cause was that we were missing PROCESS_VM_READ when getting a handle on the process using OpenProcess().