页面分配时的Visual Studio断点

Question

I'm trying to find the cause of an access violation within a library that always seems to occur at a certain page limit (an address like 0x06B12000).

Now I'm trying to trace the page allocations to find out if the program misses out on some point, but VirtualAlloc only seems to get called a handful of times during program start and not later on.

Am I missing something?

Answer 1

You can set a breakpoint on malloc via "Break at Function". The Studio comes with some source code for its runtime library so you can debug in there.

Once you have hit this breakpoint you can add a condition to it to make it only trigger if the returned memory contains the address you are looking for. Something like (res <= 0x....) && (0x.... < res + nSize) . This would work for VS2010 debug builds.

Release builds are more difficult since some of the local variables are only kept in registers.