ARM Cortex M3 How do I determine the program counter value before a hard fault?

Question

I have an embedded project using a STM32F103 (ARM Cortex M3), it is getting a occasionally getting hard fault in release mode. As part of recovery, I would like to retrieve

Answer 1

I found a common cause for these issues are those 'for loop' delays. When using -O3 they simply get optimized away if you are are not referring to volatile variables. Personally, I prefer the SysTick approach.