6502/SixtyPical
1
0
Fork 0
mirror of https://github.com/catseye/SixtyPical.git synced 2024-06-01 12:41:30 +00:00
Code Issues Projects Releases Wiki Activity

Better name for this error.

Browse Source
This commit is contained in:
Chris Pressey 2018-11-27 17:06:07 +00:00
parent 21e623f3ad
commit a53a3529ea
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/sixtypical/analyzer.py
View File

@ -46,6 +46,12 @@ class IllegalJumpError(StaticAnalysisError):
pass
class TerminatedContextError(StaticAnalysisError):
"""What the program is doing here is not valid, due to preceding `goto`s,
which make this dead code."""
pass
class RangeExceededError(StaticAnalysisError):
pass
@ -139,6 +145,8 @@ class Context(object):
self._touched = set(other._touched)
self._range = dict(other._range)
self._writeable = set(other._writeable)
self._terminated = other._terminated
self._gotos_encounters = set(other._gotos_encountered)
def each_meaningful(self):
for ref in self._range.keys():
@ -416,6 +424,7 @@ class Analyzer(object):
raise InconsistentInitializationError('?')
if set(ex.each_touched()) != exit_touched:
raise InconsistentInitializationError('?')
# FIXME: confirm writeable sets are the same too?
context.update_from(exit_context)
trashed = set(context.each_touched()) - set(context.each_meaningful())
@ -470,7 +479,7 @@ class Analyzer(object):
src = instr.src
if context.has_terminated():
raise IllegalJumpError(instr, instr) # TODO: maybe a better name for this
raise TerminatedContextError(instr, instr)
if opcode == 'ld':
if isinstance(src, IndexedRef):