CODEWITHSUNDEEP
c++visual-studio-2010debugging
CodyBugstein
CodyBugstein

Reputation: 23302

Breakpoint that activates only when variable hits a specific value

I am debugging a program that has a lot of for loops, each one with hundreds of values to loop through.

Within all this, I'd like to determine that behaviour of a variable when it reaches a certain value.

However, to do so, I would have to manually cycle step through all the loops and make sure not to space out. It would take me hours.

Is there a way to set a breakpoint that only activates when the variable is a certain value?

Upvotes: 1

Views: 167

Answers (3)

Cory Kramer
Cory Kramer

Reputation: 117856

Create a conditional breakpoint. These can be set up to break when

  • the value at an address changes, which is useful if you are looking for when a variable is set

  • the value of a variable equals a particular value, which is the case you are looking for

There are other nice uses of conditional breakpoints so you don't have to put a hard breakpoint as you noted.

Upvotes: 3

user3115197
user3115197

Reputation: 121

Just insert in the cycle something like 

If(Variable==value)
{
 int unuseful=0;
}

and set the breakpoint on the operation inside the if

Upvotes: 3

nesderl
nesderl

Reputation: 325

What you're looking for is called conditional breakpoints.

Visual Studio 2010 does support conditional breakpoints, you can just create your breakpoint, right click it and then click on Condition.

Upvotes: 6

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