class VLibManager(object):
"""handle a set of vlib instances"""
def __init__(self,
machine,
alloc,
main_profiler=None,
prof_names=None,
prof_calls=False):
self.machine = machine
self.mem = machine.get_mem()
self.alloc = alloc
self.lib_reg = LibRegistry()
self.ctx_map = LibCtxMap(machine)
self.lib_profiler = LibProfiler(prof_names, prof_calls)
if main_profiler:
main_profiler.add_profiler(self.lib_profiler)
# tools
self._setup_creator()
# state
self.exec_lib = None
self.addr_vlib = {}
self.name_vlib = {}
def _setup_creator(self):
# tools
log_missing = None
log_valid = None
if log_lib.isEnabledFor(logging.WARNING):
log_missing = log_lib
if log_lib.isEnabledFor(logging.INFO):
log_valid = log_lib
self.creator = LibCreator(self.alloc,
self.machine.get_traps(),
log_missing=log_missing,
log_valid=log_valid,
lib_profiler=self.lib_profiler)
def add_impl_cls(self, name, impl_cls):
self.lib_reg.add_lib_impl(name, impl_cls)
def add_ctx(self, name, ctx):
self.ctx_map.add_ctx(name, ctx)
def bootstrap_exec(self, exec_info=None, version=0, revision=0):
"""setup exec library"""
if exec_info is None:
date = datetime.date(day=7, month=7, year=2007)
exec_info = LibInfo('exec.library', version, revision, date)
# make sure its an exec info
assert exec_info.get_name() == 'exec.library'
# create vlib
vlib = self._create_vlib(exec_info, False)
assert vlib
assert vlib.impl
# setup exec_lib
lib_base = vlib.get_library().get_addr()
self.exec_lib = ExecLibrary(self.mem, lib_base)
# store lib base
self.mem.w32(4, lib_base)
self.machine.set_zero_mem(0, lib_base)
# with exec_lib in place we can add exec's vlib
self._add_vlib(vlib)
# inc exec's open cnt so lib gets never expunged
self.exec_lib.lib_node.inc_open_cnt()
return vlib
def get_vlib_by_addr(self, addr):
"""return associated vlib for a base lib address"""
if addr in self.addr_vlib:
return self.addr_vlib[addr]
def get_vlib_by_name(self, name):
"""return associated vlib for a name"""
if name in self.name_vlib:
return self.name_vlib[name]
def get_profiler(self):
return self.lib_profiler
def shutdown(self):
"""cleanup libs
try to expunge all libs and report still open ones
"""
log_libmgr.info("[vamos] +shutdown")
# dec exec's open cnt
self.exec_lib.lib_node.dec_open_cnt()
# now expunge all libs
left_libs = self.expunge_libs()
left_devs = self.expunge_devs()
log_libmgr.info("[vamos] +shutdown: left libs=%d, devs=%d", left_libs,
left_devs)
return left_libs + left_devs
def expunge_libs(self):
"""expunge all unused vlibs
return number of libs _not_ expunged
"""
return self._expunge_list(self.exec_lib.lib_list)
def expunge_devs(self):
"""expunge all unused vlibs
return number of libs _not_ expunged
"""
return self._expunge_list(self.exec_lib.device_list)
def _expunge_list(self, node_list):
left_libs = 0
for node in node_list:
lib_base = node.get_addr()
# is it a vlib?
if lib_base in self.addr_vlib:
vlib = self.addr_vlib[lib_base]
if not self.expunge_lib(vlib):
lib = vlib.get_library()
log_libmgr.warn("can't expunge: '%s' with open count %d",
lib.name, lib.open_cnt)
left_libs += 1
return left_libs
def expunge_lib(self, vlib):
"""expunge a vlib"""
lib = vlib.get_library()
# still open?
if lib.open_cnt > 0:
return False
# vlib?
self._rem_vlib(vlib)
return True
def make_lib_name(self,
name,
version=0,
revision=0,
fake=False,
lib_cfg=None):
date = datetime.date(day=7, month=7, year=2007)
info = LibInfo(name, version, revision, date)
return self.make_lib(info, fake, lib_cfg)
def make_lib(self, lib_info, fake=False, lib_cfg=None):
vlib = self._create_vlib(lib_info, fake, lib_cfg)
if vlib:
self._add_vlib(vlib)
return vlib
def open_lib_name(self,
name,
version=0,
revision=0,
fake=False,
lib_cfg=None):
vlib = self.get_vlib_by_name(name)
if not vlib:
vlib = self.make_lib_name(name, version, revision, fake, lib_cfg)
if vlib:
vlib.open()
return vlib
def open_lib(self, lib_info, fake=False, lib_cfg=None):
vlib = self.get_vlib_by_name(name)
if not vlib:
vlib = self.make_lib(lib_info, fake, lib_cfg)
if vlib:
vlib.open()
return vlib
def close_lib(self, vlib):
vlib.close()
return self.expunge_lib(vlib)
def _create_vlib(self, lib_info, fake, lib_cfg=None):
# get lib ctx
name = lib_info.get_name()
ctx = self.ctx_map.get_ctx(name)
# get impl
if fake:
impl = None
else:
name = lib_info.get_name()
impl_cls = self.lib_reg.get_lib_impl(name)
if impl_cls:
impl = impl_cls()
# adjust version?
if lib_info.version == 0:
lib_info.version = impl.get_version()
else:
return None
# create lib
vlib = self.creator.create_lib(lib_info, ctx, impl, lib_cfg)
# store vlib in context
ctx.vlib = vlib
return vlib
def _add_vlib(self, vlib):
addr = vlib.get_addr()
name = vlib.get_name()
# store internally
self.addr_vlib[addr] = vlib
self.name_vlib[name] = vlib
# add lib to exec lib list
lib = vlib.get_library()
if vlib.is_device():
self.exec_lib.device_list.enqueue(lib.node)
else:
self.exec_lib.lib_list.enqueue(lib.node)
def _rem_vlib(self, vlib):
addr = vlib.get_addr()
name = vlib.get_name()
# remove internally
del self.addr_vlib[addr]
del self.name_vlib[name]
# remove from exec lib list
lib = vlib.get_library()
lib.node.remove()
# free vlib
vlib.free()
def get_reg():
lr = LibRegistry()
lr.add_lib_impl('dos.library', DosLibrary)
lr.add_lib_impl('exec.library', ExecLibrary)
return lr