Disassembly: How can you determine the correct PC location about debug-adapter-protocol HOT 2 CLOSED

Is your question how do obtain disassembly around the current instruction?
Or how do you decide that a disassembly that you previously requested is still valid?

For the former, assuming you would like to put the instruction in the center of your text buffer of height lines, what should work is:

• Take the StackFrame.instructionPointerReference to see where you are
• Issue a disassemble request with
  • memoryReference = instructionPointerReference
  • instructionOffset = -height/2 (or more if you want to be able to page back without requesting more instructions)
  • instructionCount = height (or more if you want)
  • resolveSymbols = true (or false, up to you)

If the later, you could either:

• Just always update, to make sure that self-modifying code is handled. You could do something so that if the instructions you get back are the same and scrolling is unnecessary, you just move the current instruction indicator.
  -or-
• Issue a readMemory request with count=0, and check if the address is within the range of disassembly that you have.

from debug-adapter-protocol.

Ok thanks. I was really just trying to work out which instruction was current.

But I think you answered with the fist part, combined with this :

An adapter must return exactly this number of instructions - any

• unavailable instructions should be replaced with an implementation-defined
• 'invalid instruction' value.

Point being, if I ask for 100 instructions with an offset of -50 then the 51st instruction is the one matching the memory reference.

Seems obvious now, thanks.

from debug-adapter-protocol.