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vm: add property for custom breakpoint handler

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This commit is contained in:
Irmen de Jong 2022-12-30 15:10:13 +01:00
parent 002006517a
commit a04839dd6b
3 changed files with 17 additions and 6 deletions
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2
codeGenCpu6502/src/prog8/codegen/cpu6502/AssemblyProgram.kt
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@ -124,7 +124,7 @@ internal class AssemblyProgram(
breakpoints.add("break \$" + match.groupValues[1])
}
val num = breakpoints.size
breakpoints.add(0, "; vice monitor breakpoint list now follows")
breakpoints.add(0, "; breakpoint list now follows")
breakpoints.add(1, "; $num breakpoints have been defined")
breakpoints.add(2, "del")
viceMonListFile.toFile().appendText(breakpoints.joinToString("\n") + "\n")

11
docs/source/building.rst
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@ -123,7 +123,7 @@ One or more .p8 module files
Auto-starts target system emulator after successful compilation.
emu2 starts the alternative emulator if available.
The compiled program and the symbol and breakpoint lists
(for the machine code monitor) are immediately loaded into the emulator..
(for the machine code monitor) are immediately loaded into the emulator (if it supports them)
``-out <directory>``
sets directory location for output files instead of current directory
@ -207,8 +207,8 @@ the ``srcdirs`` command line option.
.. _debugging:
Debugging (with VICE)
---------------------
Debugging (with VICE or Box16)
------------------------------
There's support for using the monitor and debugging capabilities of the rather excellent
`VICE emulator <http://vice-emu.sourceforge.net/>`_.
@ -218,7 +218,7 @@ a *breakpoint* at that position. Some systems use a BRK instruction for this, bu
this will usually halt the machine altogether instead of just suspending execution.
Prog8 issues a NOP instruction instead and creates a 'virtual' breakpoint at this position.
All breakpoints are then written to a file called "programname.vice-mon-list",
which is meant to be used by the VICE emulator.
which is meant to be used by the VICE and Box16 emulators.
It contains a series of commands for VICE's monitor, including source labels and the breakpoint settings.
If you use the emulator autostart feature of the compiler, it will take care of this for you.
If you launch VICE manually, you'll have to use a command line option to load this file:
@ -228,6 +228,9 @@ If you launch VICE manually, you'll have to use a command line option to load th
VICE will then use the label names in memory disassembly, and will activate any breakpoints as well.
If your running program hits one of the breakpoints, VICE will halt execution and drop you into the monitor.
Box16 is the alternative emulator for the Commander X16 and it also includes debugging facilities
that support these symbol and breakpoint lists.
Troubleshooting
---------------

10
virtualmachine/src/prog8/vm/VirtualMachine.kt
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@ -36,6 +36,7 @@ class VirtualMachine(irProgram: IRProgram) {
val registers = Registers()
val callStack = Stack<Pair<IRCodeChunk, Int>>()
val valueStack = Stack<UByte>() // max 128 entries
var breakpointHandler: ((pcChunk: IRCodeChunk, pcIndex: Int) -> Unit)? = null // can set custom breakpoint handler
var pcChunk: IRCodeChunk
var pcIndex = 0
var stepCount = 0
@ -348,7 +349,10 @@ class VirtualMachine(irProgram: IRProgram) {
private fun InsBREAKPOINT() {
nextPc()
throw BreakpointException(pcChunk, pcIndex)
if(breakpointHandler!=null)
breakpointHandler?.invoke(pcChunk, pcIndex)
else
throw BreakpointException(pcChunk, pcIndex)
}
private fun InsLOADCPU(i: IRInstruction) {
@ -2217,6 +2221,10 @@ class VmRunner: IVirtualMachineRunner {
fun runAndTestProgram(irSource: String, test: (VirtualMachine) -> Unit) {
val irProgram = IRFileReader().read(irSource)
val vm = VirtualMachine(irProgram)
// vm.breakpointHandler = { pcChunk, pcIndex ->
// println("UNHANDLED BREAKPOINT")
// println(" IN CHUNK: $pcChunk(${pcChunk.label}) INDEX: $pcIndex = INSTR ${pcChunk.instructions[pcIndex]}")
// }
vm.run()
test(vm)
}