def retrace(self, db, task):
new_symbols = {}
new_symbolsources = {}
debug_paths = set(os.path.join(task.debuginfo.unpacked_path, fname[1:])
for fname in task.debuginfo.debug_files)
if task.debuginfo.debug_files is not None:
db_debug_pkg = task.debuginfo.db_package
if db_debug_pkg.has_lob("offset_map"):
with db_debug_pkg.get_lob_fd("offset_map") as fd:
offset_map = pickle.load(fd)
else:
offset_map = get_function_offset_map(debug_paths)
db_debug_pkg.save_lob("offset_map", pickle.dumps(offset_map))
else:
offset_map = {}
for bin_pkg, db_ssources in task.binary_packages.items():
i = 0
for db_ssource in db_ssources:
i += 1
module = db_ssource.path
self.log_info(u"[{0} / {1}] Processing '{2}' @ '{3}'"
.format(i, len(db_ssources),
db_ssource.symbol.name, module))
if db_ssource.path == "vmlinux":
address = db_ssource.offset
if address < 0:
address += (1 << 64)
else:
if module not in offset_map:
self.log_debug("Module '{0}' not found in package '{1}'"
.format(module, task.debuginfo.nvra))
db_ssource.retrace_fail_count += 1
continue
module_map = offset_map[module]
symbol_name = db_ssource.symbol.name
if symbol_name not in module_map:
symbol_name = symbol_name.lstrip("_")
if symbol_name not in module_map:
self.log_debug("Function '{0}' not found in module "
"'{1}'".format(db_ssource.symbol.name,
module))
db_ssource.retrace_fail_count += 1
continue
address = module_map[symbol_name] + db_ssource.func_offset
debug_dir = os.path.join(task.debuginfo.unpacked_path,
"usr", "lib", "debug")
debug_path = self._get_debug_path(db, module,
task.debuginfo.db_package)
if debug_path is None:
db_ssource.retrace_fail_count += 1
continue
try:
abspath = os.path.join(task.debuginfo.unpacked_path,
debug_path[1:])
results = addr2line(abspath, address, debug_dir)
results.reverse()
except FafError as ex:
self.log_debug("addr2line failed: {0}".format(str(ex)))
db_ssource.retrace_fail_count += 1
continue
inl_id = 0
while len(results) > 1:
inl_id += 1
funcname, srcfile, srcline = results.pop()
self.log_debug("Unwinding inlined function '{0}'"
.format(funcname))
# hack - we have no offset for inlined symbols
# let's use minus source line to avoid collisions
offset = -srcline
db_ssource_inl = get_ssource_by_bpo(db, db_ssource.build_id,
db_ssource.path, offset)
if db_ssource_inl is None:
key = (db_ssource.build_id, db_ssource.path, offset)
if key in new_symbolsources:
db_ssource_inl = new_symbolsources[key]
else:
db_symbol_inl = get_symbol_by_name_path(db,
funcname,
module)
if db_symbol_inl is None:
sym_key = (funcname, module)
if sym_key in new_symbols:
db_symbol_inl = new_symbols[sym_key]
else:
db_symbol_inl = Symbol()
db_symbol_inl.name = funcname
db_symbol_inl.normalized_path = module
db.session.add(db_symbol_inl)
new_symbols[sym_key] = db_symbol_inl
db_ssource_inl = SymbolSource()
db_ssource_inl.symbol = db_symbol_inl
db_ssource_inl.build_id = db_ssource.build_id
db_ssource_inl.path = module
db_ssource_inl.offset = offset
db_ssource_inl.source_path = srcfile
db_ssource_inl.line_number = srcline
db.session.add(db_ssource_inl)
new_symbolsources[key] = db_ssource_inl
for db_frame in db_ssource.frames:
db_frames = sorted(db_frame.thread.frames,
key=lambda f: f.order)
idx = db_frames.index(db_frame)
if idx > 0:
prevframe = db_frame.thread.frames[idx - 1]
if (prevframe.inlined and
prevframe.symbolsource == db_ssource_inl):
continue
db_newframe = ReportBtFrame()
db_newframe.symbolsource = db_ssource_inl
db_newframe.thread = db_frame.thread
db_newframe.inlined = True
db_newframe.order = db_frame.order - inl_id
db.session.add(db_newframe)
funcname, srcfile, srcline = results.pop()
self.log_debug("Result: {0}".format(funcname))
db_symbol = get_symbol_by_name_path(db, funcname, module)
if db_symbol is None:
key = (funcname, module)
if key in new_symbols:
db_symbol = new_symbols[key]
else:
self.log_debug("Creating new symbol '{0}' @ '{1}'"
.format(funcname, module))
db_symbol = Symbol()
db_symbol.name = funcname
db_symbol.normalized_path = module
db.session.add(db_symbol)
new_symbols[key] = db_symbol
if db_symbol.nice_name is None:
db_symbol.nice_name = demangle(funcname)
db_ssource.symbol = db_symbol
db_ssource.source_path = srcfile
db_ssource.line_number = srcline
if task.debuginfo is not None:
self.log_debug("Removing {0}".format(task.debuginfo.unpacked_path))
shutil.rmtree(task.debuginfo.unpacked_path, ignore_errors=True)
if task.source is not None and task.source.unpacked_path is not None:
self.log_debug("Removing {0}".format(task.source.unpacked_path))
shutil.rmtree(task.source.unpacked_path, ignore_errors=True)
def save_ureport(self, db, db_report, ureport, flush=False, count=1):
bthash1 = self._hash_koops(ureport["frames"], skip_unreliable=False)
bthash2 = self._hash_koops(ureport["frames"], skip_unreliable=True)
if len(db_report.backtraces) < 1:
db_backtrace = ReportBacktrace()
db_backtrace.report = db_report
db.session.add(db_backtrace)
db_thread = ReportBtThread()
db_thread.backtrace = db_backtrace
db_thread.crashthread = True
db.session.add(db_thread)
db_bthash1 = ReportBtHash()
db_bthash1.backtrace = db_backtrace
db_bthash1.hash = bthash1
db_bthash1.type = "NAMES"
db.session.add(db_bthash1)
if bthash2 is not None and bthash1 != bthash2:
db_bthash2 = ReportBtHash()
db_bthash2.backtrace = db_backtrace
db_bthash2.hash = bthash2
db_bthash2.type = "NAMES"
db.session.add(db_bthash2)
new_symbols = {}
new_symbolsources = {}
i = 0
for frame in ureport["frames"]:
# OK, this is totally ugly.
# Frames may contain inlined functions, that would normally
# require shifting all frames by 1 and inserting a new one.
# There is no way to do this efficiently with SQL Alchemy
# (you need to go one by one and flush after each) so
# creating a space for additional frames is a huge speed
# optimization.
i += 10
# nah, another hack, deals with wrong parsing
if frame["function_name"].startswith("0x"):
continue
if not "module_name" in frame:
module = "vmlinux"
else:
module = frame["module_name"]
db_symbol = get_symbol_by_name_path(db, frame["function_name"],
module)
if db_symbol is None:
key = (frame["function_name"], module)
if key in new_symbols:
db_symbol = new_symbols[key]
else:
db_symbol = Symbol()
db_symbol.name = frame["function_name"]
db_symbol.normalized_path = module
db.session.add(db_symbol)
new_symbols[key] = db_symbol
# this doesn't work well. on 64bit, kernel maps to
# the end of address space (64bit unsigned), but in
# postgres bigint is 64bit signed and can't save
# the value - let's just map it to signed
if frame["address"] >= (1 << 63):
address = frame["address"] - (1 << 64)
else:
address = frame["address"]
db_symbolsource = get_ssource_by_bpo(db, ureport["version"],
module, address)
if db_symbolsource is None:
key = (ureport["version"], module, address)
if key in new_symbolsources:
db_symbolsource = new_symbolsources[key]
else:
db_symbolsource = SymbolSource()
db_symbolsource.path = module
db_symbolsource.offset = address
db_symbolsource.func_offset = frame["function_offset"]
db_symbolsource.symbol = db_symbol
db_symbolsource.build_id = ureport["version"]
db.session.add(db_symbolsource)
new_symbolsources[key] = db_symbolsource
db_frame = ReportBtFrame()
db_frame.thread = db_thread
db_frame.order = i
db_frame.symbolsource = db_symbolsource
db_frame.inlined = False
db_frame.reliable = frame["reliable"]
db.session.add(db_frame)
for taintflag in ureport["taint_flags"]:
db_taintflag = get_taint_flag_by_ureport_name(db, taintflag)
if db_taintflag is None:
self.log_warn("Skipping unsupported taint flag '{0}'"
.format(taintflag))
continue
db_bttaintflag = ReportBtTaintFlag()
db_bttaintflag.backtrace = db_backtrace
db_bttaintflag.taintflag = db_taintflag
db.session.add(db_bttaintflag)
if "modules" in ureport:
new_modules = {}
# use set() to remove duplicates
for module in set(ureport["modules"]):
idx = module.find("(")
if idx >= 0:
module = module[:idx]
db_module = get_kernelmodule_by_name(db, module)
if db_module is None:
if module in new_modules:
db_module = new_modules[module]
else:
db_module = KernelModule()
db_module.name = module
db.session.add(db_module)
new_modules[module] = db_module
db_btmodule = ReportBtKernelModule()
db_btmodule.kernelmodule = db_module
db_btmodule.backtrace = db_backtrace
db.session.add(db_btmodule)
# do not overwrite an existing oops
if not db_report.has_lob("oops"):
# do not append here, but create a new dict
# we only want save_ureport_post_flush process the most
# recently saved report
self.add_lob = {db_report: ureport["raw_oops"].encode("utf-8")}
if flush:
db.session.flush()
def retrace(self, db, task):
new_symbols = {}
new_symbolsources = {}
for bin_pkg, db_ssources in task.binary_packages.items():
self.log_info("Retracing symbols from package {0}"
.format(bin_pkg.nvra))
i = 0
for db_ssource in db_ssources:
i += 1
self.log_debug("[{0} / {1}] Processing '{2}' @ '{3}'"
.format(i, len(db_ssources),
ssource2funcname(db_ssource),
db_ssource.path))
norm_path = get_libname(db_ssource.path)
binary = os.path.join(bin_pkg.unpacked_path,
db_ssource.path[1:])
try:
address = get_base_address(binary) + db_ssource.offset
except FafError as ex:
self.log_debug("get_base_address failed: {0}"
.format(str(ex)))
continue
try:
debug_path = os.path.join(task.debuginfo.unpacked_path,
"usr", "lib", "debug")
results = addr2line(binary, address, debug_path)
results.reverse()
except Exception as ex:
self.log_debug("addr2line failed: {0}".format(str(ex)))
continue
inl_id = 0
while len(results) > 1:
inl_id += 1
funcname, srcfile, srcline = results.pop()
self.log_debug("Unwinding inlined function '{0}'"
.format(funcname))
# hack - we have no offset for inlined symbols
# let's use minus source line to avoid collisions
offset = -srcline
db_ssource_inl = get_ssource_by_bpo(db, db_ssource.build_id,
db_ssource.path, offset)
if db_ssource_inl is None:
key = (db_ssource.build_id, db_ssource.path, offset)
if key in new_symbolsources:
db_ssource_inl = new_symbolsources[key]
else:
db_symbol_inl = get_symbol_by_name_path(db,
funcname,
norm_path)
if db_symbol_inl is None:
sym_key = (funcname, norm_path)
if sym_key in new_symbols:
db_symbol_inl = new_symbols[sym_key]
else:
db_symbol_inl = Symbol()
db_symbol_inl.name = funcname
db_symbol_inl.normalized_path = norm_path
db.session.add(db_symbol_inl)
new_symbols[sym_key] = db_symbol_inl
db_ssource_inl = SymbolSource()
db_ssource_inl.symbol = db_symbol_inl
db_ssource_inl.build_id = db_ssource.build_id
db_ssource_inl.path = db_ssource.path
db_ssource_inl.offset = offset
db_ssource_inl.source_path = srcfile
db_ssource_inl.line_number = srcline
db.session.add(db_ssource_inl)
new_symbolsources[key] = db_ssource_inl
for db_frame in db_ssource.frames:
db_frames = sorted(db_frame.thread.frames,
key=lambda f: f.order)
idx = db_frames.index(db_frame)
if idx > 0:
prevframe = db_frame.thread.frames[idx - 1]
if (prevframe.inlined and
prevframe.symbolsource == db_ssource_inl):
continue
db_newframe = ReportBtFrame()
db_newframe.symbolsource = db_ssource_inl
db_newframe.thread = db_frame.thread
db_newframe.inlined = True
db_newframe.order = db_frame.order - inl_id
db.session.add(db_newframe)
funcname, srcfile, srcline = results.pop()
self.log_debug("Result: {0}".format(funcname))
db_symbol = get_symbol_by_name_path(db, funcname, norm_path)
if db_symbol is None:
key = (funcname, norm_path)
if key in new_symbols:
db_symbol = new_symbols[key]
else:
self.log_debug("Creating new symbol '{0}' @ '{1}'"
.format(funcname, db_ssource.path))
db_symbol = Symbol()
db_symbol.name = funcname
db_symbol.normalized_path = norm_path
db.session.add(db_symbol)
new_symbols[key] = db_symbol
if db_symbol.nice_name is None:
db_symbol.nice_name = demangle(funcname)
db_ssource.symbol = db_symbol
db_ssource.source_path = srcfile
db_ssource.line_number = srcline
if task.debuginfo.unpacked_path is not None:
self.log_debug("Removing {0}".format(task.debuginfo.unpacked_path))
shutil.rmtree(task.debuginfo.unpacked_path, ignore_errors=True)
if task.source is not None and task.source.unpacked_path is not None:
self.log_debug("Removing {0}".format(task.source.unpacked_path))
shutil.rmtree(task.source.unpacked_path, ignore_errors=True)
for bin_pkg in task.binary_packages.keys():
if bin_pkg.unpacked_path is not None:
self.log_debug("Removing {0}".format(bin_pkg.unpacked_path))
shutil.rmtree(bin_pkg.unpacked_path, ignore_errors=True)
def save_ureport(self, db, db_report, ureport, flush=False):
db_report.errname = str(ureport["signal"])
db_reportexe = get_reportexe(db, db_report, ureport["executable"])
if db_reportexe is None:
db_reportexe = ReportExecutable()
db_reportexe.path = ureport["executable"]
db_reportexe.report = db_report
db_reportexe.count = 0
db.session.add(db_reportexe)
db_reportexe.count += 1
bthashes = self._hash_backtrace(ureport["stacktrace"])
if len(bthashes) < 1:
raise FafError("Unable to get backtrace hash")
bts = filter(None, set(get_backtrace_by_hash(db, b) for b in bthashes))
if len(bts) > 1:
raise FafError("Unable to reliably identify backtrace by hash")
if len(bts) == 1:
db_backtrace = bts.pop()
else:
new_symbols = {}
new_symbolsources = {}
db_backtrace = ReportBacktrace()
db_backtrace.report = db_report
db.session.add(db_backtrace)
for bthash in bthashes:
db_bthash = ReportBtHash()
db_bthash.backtrace = db_backtrace
db_bthash.type = "NAMES"
db_bthash.hash = bthash
db.session.add(db_bthash)
tid = 0
for thread in ureport["stacktrace"]:
tid += 1
crash = "crash_thread" in thread and thread["crash_thread"]
db_thread = ReportBtThread()
db_thread.backtrace = db_backtrace
db_thread.number = tid
db_thread.crashthread = crash
db.session.add(db_thread)
fid = 0
for frame in thread["frames"]:
# OK, this is totally ugly.
# Frames may contain inlined functions, that would normally
# require shifting all frames by 1 and inserting a new one.
# There is no way to do this efficiently with SQL Alchemy
# (you need to go one by one and flush after each) so
# creating a space for additional frames is a huge speed
# optimization.
fid += 10
if "build_id" in frame:
build_id = frame["build_id"]
else:
build_id = None
if "fingerprint" in frame:
fingerprint = frame["fingerprint"]
else:
fingerprint = None
path = os.path.abspath(frame["file_name"])
offset = frame["build_id_offset"]
db_symbol = None
if "function_name" in frame:
norm_path = get_libname(path)
db_symbol = \
get_symbol_by_name_path(db,
frame["function_name"],
norm_path)
if db_symbol is None:
key = (frame["function_name"], norm_path)
if key in new_symbols:
db_symbol = new_symbols[key]
else:
db_symbol = Symbol()
db_symbol.name = frame["function_name"]
db_symbol.normalized_path = norm_path
db.session.add(db_symbol)
new_symbols[key] = db_symbol
db_symbolsource = get_ssource_by_bpo(db, build_id,
path, offset)
if db_symbolsource is None:
key = (build_id, path, offset)
if key in new_symbolsources:
db_symbolsource = new_symbolsources[key]
else:
db_symbolsource = SymbolSource()
db_symbolsource.symbol = db_symbol
db_symbolsource.build_id = build_id
db_symbolsource.path = path
db_symbolsource.offset = offset
db_symbolsource.hash = fingerprint
db.session.add(db_symbolsource)
new_symbolsources[key] = db_symbolsource
db_frame = ReportBtFrame()
db_frame.thread = db_thread
db_frame.order = fid
db_frame.symbolsource = db_symbolsource
db_frame.inlined = False
db.session.add(db_frame)
if flush:
db.session.flush()
def retrace(self, db, task):
new_symbols = {}
new_symbolsources = {}
for bin_pkg, db_ssources in task.binary_packages.items():
self.log_info("Retracing symbols from package {0}".format(
bin_pkg.nvra))
i = 0
for db_ssource in db_ssources:
i += 1
self.log_debug("[%d / %d] Processing '%s' @ '%s'", i,
len(db_ssources), ssource2funcname(db_ssource),
db_ssource.path)
norm_path = get_libname(db_ssource.path)
if bin_pkg.unpacked_path is None:
self.log_debug(
"fail: path to unpacked binary package not found")
db_ssource.retrace_fail_count += 1
continue
binary = os.path.join(bin_pkg.unpacked_path,
db_ssource.path[1:])
try:
address = get_base_address(binary) + db_ssource.offset
except FafError as ex:
self.log_debug("get_base_address failed: %s", str(ex))
db_ssource.retrace_fail_count += 1
continue
try:
debug_path = os.path.join(task.debuginfo.unpacked_path,
"usr", "lib", "debug")
results = addr2line(binary, address, debug_path)
results.reverse()
except Exception as ex: # pylint: disable=broad-except
self.log_debug("addr2line failed: %s", str(ex))
db_ssource.retrace_fail_count += 1
continue
inl_id = 0
while len(results) > 1:
inl_id += 1
funcname, srcfile, srcline = results.pop()
self.log_debug("Unwinding inlined function '%s'", funcname)
# hack - we have no offset for inlined symbols
# let's use minus source line to avoid collisions
offset = -srcline
db_ssource_inl = get_ssource_by_bpo(
db, db_ssource.build_id, db_ssource.path, offset)
if db_ssource_inl is None:
key = (db_ssource.build_id, db_ssource.path, offset)
if key in new_symbolsources:
db_ssource_inl = new_symbolsources[key]
else:
db_symbol_inl = get_symbol_by_name_path(
db, funcname, norm_path)
if db_symbol_inl is None:
sym_key = (funcname, norm_path)
if sym_key in new_symbols:
db_symbol_inl = new_symbols[sym_key]
else:
db_symbol_inl = Symbol()
db_symbol_inl.name = funcname
db_symbol_inl.normalized_path = norm_path
db.session.add(db_symbol_inl)
new_symbols[sym_key] = db_symbol_inl
db_ssource_inl = SymbolSource()
db_ssource_inl.symbol = db_symbol_inl
db_ssource_inl.build_id = db_ssource.build_id
db_ssource_inl.path = db_ssource.path
db_ssource_inl.offset = offset
db_ssource_inl.source_path = srcfile
db_ssource_inl.line_number = srcline
db.session.add(db_ssource_inl)
new_symbolsources[key] = db_ssource_inl
for db_frame in db_ssource.frames:
db_frames = sorted(db_frame.thread.frames,
key=lambda f: f.order)
idx = db_frames.index(db_frame)
if idx > 0:
prevframe = db_frame.thread.frames[idx - 1]
if (prevframe.inlined and prevframe.symbolsource
== db_ssource_inl):
continue
db_newframe = ReportBtFrame()
db_newframe.symbolsource = db_ssource_inl
db_newframe.thread = db_frame.thread
db_newframe.inlined = True
db_newframe.order = db_frame.order - inl_id
db.session.add(db_newframe)
funcname, srcfile, srcline = results.pop()
self.log_debug("Result: %s", funcname)
db_symbol = get_symbol_by_name_path(db, funcname, norm_path)
if db_symbol is None:
key = (funcname, norm_path)
if key in new_symbols:
db_symbol = new_symbols[key]
else:
self.log_debug("Creating new symbol '%s' @ '%s'",
funcname, db_ssource.path)
db_symbol = Symbol()
db_symbol.name = funcname
db_symbol.normalized_path = norm_path
db.session.add(db_symbol)
new_symbols[key] = db_symbol
if db_symbol.nice_name is None:
db_symbol.nice_name = demangle(funcname)
db_ssource.symbol = db_symbol
db_ssource.source_path = srcfile
db_ssource.line_number = srcline
if task.debuginfo.unpacked_path is not None:
self.log_debug("Removing %s", task.debuginfo.unpacked_path)
shutil.rmtree(task.debuginfo.unpacked_path, ignore_errors=True)
if task.source is not None and task.source.unpacked_path is not None:
self.log_debug("Removing %s", task.source.unpacked_path)
shutil.rmtree(task.source.unpacked_path, ignore_errors=True)
for bin_pkg in task.binary_packages.keys():
if bin_pkg.unpacked_path is not None:
self.log_debug("Removing %s", bin_pkg.unpacked_path)
shutil.rmtree(bin_pkg.unpacked_path, ignore_errors=True)
def save_ureport(self, db, db_report, ureport, flush=False, count=1):
db_report.errname = str(ureport["signal"])
db_reportexe = get_reportexe(db, db_report, ureport["executable"])
if db_reportexe is None:
db_reportexe = ReportExecutable()
db_reportexe.path = ureport["executable"]
db_reportexe.report = db_report
db_reportexe.count = 0
db.session.add(db_reportexe)
db_reportexe.count += count
bthashes = self._hash_backtrace(ureport["stacktrace"])
if not bthashes:
raise FafError("Unable to get backtrace hash")
if not db_report.backtraces:
new_symbols = {}
new_symbolsources = {}
db_backtrace = ReportBacktrace()
db_backtrace.report = db_report
db.session.add(db_backtrace)
for bthash in bthashes:
db_bthash = ReportBtHash()
db_bthash.backtrace = db_backtrace
db_bthash.type = "NAMES"
db_bthash.hash = bthash
db.session.add(db_bthash)
tid = 0
for thread in ureport["stacktrace"]:
tid += 1
crash = "crash_thread" in thread and thread["crash_thread"]
db_thread = ReportBtThread()
db_thread.backtrace = db_backtrace
db_thread.number = tid
db_thread.crashthread = crash
db.session.add(db_thread)
fid = 0
for frame in thread["frames"]:
# OK, this is totally ugly.
# Frames may contain inlined functions, that would normally
# require shifting all frames by 1 and inserting a new one.
# There is no way to do this efficiently with SQL Alchemy
# (you need to go one by one and flush after each) so
# creating a space for additional frames is a huge speed
# optimization.
fid += 10
if "build_id" in frame:
build_id = frame["build_id"]
else:
build_id = None
if "fingerprint" in frame:
fingerprint = frame["fingerprint"]
else:
fingerprint = None
path = os.path.abspath(frame["file_name"])
offset = frame["build_id_offset"]
db_symbol = None
if "function_name" in frame:
norm_path = get_libname(path)
db_symbol = \
get_symbol_by_name_path(db,
frame["function_name"],
norm_path)
if db_symbol is None:
key = (frame["function_name"], norm_path)
if key in new_symbols:
db_symbol = new_symbols[key]
else:
db_symbol = Symbol()
db_symbol.name = frame["function_name"]
db_symbol.normalized_path = norm_path
db.session.add(db_symbol)
new_symbols[key] = db_symbol
db_symbolsource = get_ssource_by_bpo(
db, build_id, path, offset)
if db_symbolsource is None:
key = (build_id, path, offset)
if key in new_symbolsources:
db_symbolsource = new_symbolsources[key]
else:
db_symbolsource = SymbolSource()
db_symbolsource.symbol = db_symbol
db_symbolsource.build_id = build_id
db_symbolsource.path = path
db_symbolsource.offset = offset
db_symbolsource.hash = fingerprint
db.session.add(db_symbolsource)
new_symbolsources[key] = db_symbolsource
db_frame = ReportBtFrame()
db_frame.thread = db_thread
db_frame.order = fid
db_frame.symbolsource = db_symbolsource
db_frame.inlined = False
db.session.add(db_frame)
if flush:
db.session.flush()