Overview

QtCreator is using CDB bu command to set breakpoints. But bu command sets only one breakpoint at a time by design. This leads to a problem when user sets a breakpoint in a static library, which is used multiple times. Because CDB will set the breakpoint in only one module, instead of all, where this staic library is used.

Example to reproduce:

I've attached an example project, which shows the problem. Here's the structure of the project:

#include "mymath.h"

int sum(int a, int b)
{
    return a + b;
}

#include "mysharedlibrary_1.h"
#include "mymath.h"

int sharedSum_1()
{
    return sum(0, 2);
}

#include "mysharedlibrary_2.h"
#include "mymath.h"

int sharedSum_2()
{
    return sum(0, 3);
}

#include <QCoreApplication>
#include <QDebug>

#include "mymath.h"
#include "mysharedlibrary_1.h"
#include "mysharedlibrary_2.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    qDebug() << "staticSum()   = " << sum(0, 1);
    qDebug() << "sharedSum_1() = " << sharedSum_1();
    qDebug() << "sharedSum_2() = " << sharedSum_2();

    return a.exec();
}

Everything seems to be ok, except the fact, that if want to debug Static lib's function sum and set a breakpoint inside it, the breakpoint will actually be only set in one of the DLLs.

So, to see the problem, you need to set a breakpoint mymath.cpp::sum.

Proposal:

There's two ways to solve this:

• Use CDB's bm function to set breakpoints. This is the only one which allows setting multiple breakpoints.
• When user sets a breakpoint in file, which's compiled into a static library, collect the information, in which modules this library is used and then explicitly set brakpoint in each module.

  bu module_a!func
  bu module_b!func