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m1n1.trace: Add a state stash to Tracer that persists

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This allows Tracers to keep internal state around even across complete
re-instantiations.

Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-06-21 02:02:05 +09:00
parent 7090138779
commit 9e42f4fc0f
1 changed files with 16 additions and 3 deletions
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19
proxyclient/m1n1/trace/__init__.py
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@ -44,6 +44,9 @@ class RegCache(Reloadable):
else:
raise Exception("Cannot write register in asynchronous context")
class TracerState:
pass
class Tracer(Reloadable):
DEFAULT_MODE = TraceMode.ASYNC
@ -53,10 +56,20 @@ class Tracer(Reloadable):
self.ident = type(self).__name__
self.regmaps = {}
self.verbose = verbose
self.state = TracerState()
self.init_state()
self._cache = RegCache(hv)
if self.ident in hv.tracer_caches:
self._cache.cache = dict(hv.tracer_caches[self.ident])
hv.tracer_caches[self.ident] = self._cache.cache
cache = hv.tracer_caches.get(self.ident, None)
if cache is not None:
self._cache.cache.update(cache.get("regcache", {}))
self.state.__dict__.update(cache.get("state", {}))
hv.tracer_caches[self.ident] = {
"regcache": self._cache.cache,
"state": self.state.__dict__
}
def init_state(self):
pass
def evt_rw(self, evt, regmap=None, prefix=None):
self._cache.update(evt.addr, evt.data)