break-on-access | break on access to a property | Parser library

0x2416be is instruction pointer or virtual address of the instruction

to set access breakpoint on this address you shouldn't use r or w you should use e

ba e 2416be this doesn't require either alignment or size

if you want to set a data breakpoint on your variable a

you have to find the virtual address of a

compilers normally align variable addresses so you normally don't have to worry about alignment

use dv /v a ( you need private pdb for local variable display
and since windbg renamed the local var as a instead of ebp-xx you should be having your private pdb )

windbg will spit a result like local var a @ xxxxxx

here xxxxx is the address of variable a ( 2 would be stored

in ths address )

use ba r4 or r2 or r1 as required on this address

be aware this address may be in stack and this breakpoint may fire many times before it actually hits your condition

data read breakpoints are useful for global variables and are not so good for locals and heap addresses that are dynamic in nature

you can specify arbitrary function address to dv to look at the functions locals (need private pdb )