Debug: remove lxml dependency, pickle SVD tree for faster processing. (#909)
* Debug: remove lxml dependency, pickle SVD tree for faster processing. * Debug: remove unused import in svd.py
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.gitignore
vendored
@ -19,6 +19,7 @@ venv/
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__pycache__/
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*.py[cod]
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*$py.class
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*.pickle
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.obj/
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bindings/
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@ -16,7 +16,7 @@ My implementation so far has only tested STM32 chips but should hold for others.
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expect plenty of errors in the file. Like GPIOA having a register named GPIOB_OSPEEDR and lots of 16-bit registers
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that are listed as 32!
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The implementation consists of two components -- An lxml-based parser module (pysvd) and a GDB file (gdb_svd).
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The implementation consists of two components -- An xml parser module (pysvd) and a GDB file (gdb_svd).
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I haven't yet worked out a perfect workflow for this, though it's quite easy to use when
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you already tend to have a GDB initialization file for starting up OpenOCD and the like.
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However your workflow works, just make sure to, in GDB:
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@ -16,7 +16,6 @@ You should have received a copy of the GNU General Public License
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along with PyCortexMDebug. If not, see <http://www.gnu.org/licenses/>.
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"""
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import lxml.objectify as objectify
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import sys
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from collections import OrderedDict
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import os
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@ -24,6 +23,7 @@ import pickle
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import traceback
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import re
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import warnings
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import x2d
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class SmartDict:
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@ -126,26 +126,31 @@ class SVDFile:
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def __init__(self, fname):
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"""
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Args:
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fname: Filename for the SVD file
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"""
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f = objectify.parse(os.path.expanduser(fname))
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root = f.getroot()
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periph = root.peripherals.getchildren()
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self.peripherals = SmartDict()
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self.base_address = 0
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xml_file_name = os.path.expanduser(fname)
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pickle_file_name = xml_file_name + ".pickle"
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root = None
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if os.path.exists(pickle_file_name):
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print("Loading pickled SVD")
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root = pickle.load(open(pickle_file_name, "rb"))
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else:
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print("Loading XML SVD and pickling it")
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root = x2d.parse(open(xml_file_name, "rb"))
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pickle.dump(root, open(pickle_file_name, "wb"), pickle.HIGHEST_PROTOCOL)
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print("Processing SVD tree")
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# XML elements
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for p in periph:
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for p in root["device"]["peripherals"]["peripheral"]:
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try:
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if p.tag == "peripheral":
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self.peripherals[str(p.name)] = SVDPeripheral(p, self)
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else:
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# This is some other tag
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pass
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self.peripherals[p["name"]] = SVDPeripheral(p, self)
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except SVDNonFatalError as e:
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print(e)
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# print(e)
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pass
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print("SVD Ready")
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def add_register(parent, node):
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@ -265,11 +270,11 @@ class SVDPeripheral:
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self.parent_base_address = parent.base_address
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# Look for a base address, as it is required
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if not hasattr(svd_elem, "baseAddress"):
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if "baseAddress" not in svd_elem:
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raise SVDNonFatalError("Periph without base address")
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self.base_address = int(str(svd_elem.baseAddress), 0)
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if "derivedFrom" in svd_elem.attrib:
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derived_from = svd_elem.attrib["derivedFrom"]
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if "@derivedFrom" in svd_elem:
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derived_from = svd_elem["@derivedFrom"]
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try:
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self.name = str(svd_elem.name)
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except AttributeError:
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@ -295,16 +300,14 @@ class SVDPeripheral:
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self.clusters = SmartDict()
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if hasattr(svd_elem, "registers"):
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registers = [
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r
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for r in svd_elem.registers.getchildren()
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if r.tag in ["cluster", "register"]
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]
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for r in registers:
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if r.tag == "cluster":
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add_cluster(self, r)
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elif r.tag == "register":
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add_register(self, r)
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if "register" in svd_elem.registers:
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for r in svd_elem.registers.register:
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if isinstance(r, x2d.ObjectDict):
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add_register(self, r)
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if "cluster" in svd_elem.registers:
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for c in svd_elem.registers.cluster:
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if isinstance(c, x2d.ObjectDict):
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add_cluster(self, c)
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def refactor_parent(self, parent):
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self.parent_base_address = parent.base_address
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@ -338,11 +341,11 @@ class SVDPeripheralRegister:
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else:
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self.size = 0x20
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self.fields = SmartDict()
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if hasattr(svd_elem, "fields"):
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if "fields" in svd_elem:
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# Filter fields to only consider those of tag "field"
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fields = [f for f in svd_elem.fields.getchildren() if f.tag == "field"]
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for f in fields:
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self.fields[str(f.name)] = SVDPeripheralRegisterField(f, self)
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for f in svd_elem.fields.field:
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if isinstance(f, x2d.ObjectDict):
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self.fields[str(f.name)] = SVDPeripheralRegisterField(f, self)
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def refactor_parent(self, parent):
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self.parent_base_address = parent.base_address
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@ -23,6 +23,7 @@ import sys
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import struct
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import pkg_resources
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import fnmatch
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import traceback
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from .svd import SVDFile
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@ -99,6 +100,7 @@ class LoadSVD(gdb.Command):
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try:
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SVD(SVDFile(f))
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except Exception as e:
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traceback.print_exc()
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raise gdb.GdbError("Could not load SVD file {} : {}...\n".format(f, e))
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586
debug/PyCortexMDebug/cmdebug/x2d.py
Normal file
586
debug/PyCortexMDebug/cmdebug/x2d.py
Normal file
@ -0,0 +1,586 @@
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#!/usr/bin/env python
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"Makes working with XML feel like you are working with JSON"
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try:
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from defusedexpat import pyexpat as expat
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except ImportError:
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from xml.parsers import expat
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from xml.sax.saxutils import XMLGenerator
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from xml.sax.xmlreader import AttributesImpl
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try: # pragma no cover
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from cStringIO import StringIO
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except ImportError: # pragma no cover
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try:
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from StringIO import StringIO
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except ImportError:
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from io import StringIO
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from inspect import isgenerator
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class ObjectDict(dict):
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def __getattr__(self, name):
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if name in self:
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return self[name]
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else:
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raise AttributeError("No such attribute: " + name)
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try: # pragma no cover
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_basestring = basestring
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except NameError: # pragma no cover
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_basestring = str
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try: # pragma no cover
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_unicode = unicode
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except NameError: # pragma no cover
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_unicode = str
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__author__ = "Martin Blech"
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__version__ = "0.12.0"
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__license__ = "MIT"
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class ParsingInterrupted(Exception):
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pass
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class _DictSAXHandler(object):
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def __init__(
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self,
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item_depth=0,
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item_callback=lambda *args: True,
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xml_attribs=True,
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attr_prefix="@",
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cdata_key="#text",
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force_cdata=False,
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cdata_separator="",
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postprocessor=None,
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dict_constructor=ObjectDict,
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strip_whitespace=True,
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namespace_separator=":",
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namespaces=None,
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force_list=None,
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comment_key="#comment",
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):
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self.path = []
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self.stack = []
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self.data = []
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self.item = None
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self.item_depth = item_depth
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self.xml_attribs = xml_attribs
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self.item_callback = item_callback
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self.attr_prefix = attr_prefix
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self.cdata_key = cdata_key
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self.force_cdata = force_cdata
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self.cdata_separator = cdata_separator
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self.postprocessor = postprocessor
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self.dict_constructor = dict_constructor
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self.strip_whitespace = strip_whitespace
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self.namespace_separator = namespace_separator
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self.namespaces = namespaces
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self.namespace_declarations = ObjectDict()
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self.force_list = force_list
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self.comment_key = comment_key
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def _build_name(self, full_name):
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if self.namespaces is None:
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return full_name
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i = full_name.rfind(self.namespace_separator)
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if i == -1:
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return full_name
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namespace, name = full_name[:i], full_name[i + 1 :]
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try:
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short_namespace = self.namespaces[namespace]
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except KeyError:
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short_namespace = namespace
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if not short_namespace:
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return name
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else:
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return self.namespace_separator.join((short_namespace, name))
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def _attrs_to_dict(self, attrs):
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if isinstance(attrs, dict):
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return attrs
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return self.dict_constructor(zip(attrs[0::2], attrs[1::2]))
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def startNamespaceDecl(self, prefix, uri):
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self.namespace_declarations[prefix or ""] = uri
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def startElement(self, full_name, attrs):
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name = self._build_name(full_name)
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attrs = self._attrs_to_dict(attrs)
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if attrs and self.namespace_declarations:
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attrs["xmlns"] = self.namespace_declarations
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self.namespace_declarations = ObjectDict()
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self.path.append((name, attrs or None))
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if len(self.path) > self.item_depth:
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self.stack.append((self.item, self.data))
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if self.xml_attribs:
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attr_entries = []
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for key, value in attrs.items():
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key = self.attr_prefix + self._build_name(key)
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if self.postprocessor:
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entry = self.postprocessor(self.path, key, value)
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else:
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entry = (key, value)
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if entry:
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attr_entries.append(entry)
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attrs = self.dict_constructor(attr_entries)
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else:
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attrs = None
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self.item = attrs or None
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self.data = []
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def endElement(self, full_name):
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name = self._build_name(full_name)
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if len(self.path) == self.item_depth:
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item = self.item
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if item is None:
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item = None if not self.data else self.cdata_separator.join(self.data)
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should_continue = self.item_callback(self.path, item)
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if not should_continue:
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raise ParsingInterrupted()
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if len(self.stack):
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data = None if not self.data else self.cdata_separator.join(self.data)
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item = self.item
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self.item, self.data = self.stack.pop()
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if self.strip_whitespace and data:
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data = data.strip() or None
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if data and self.force_cdata and item is None:
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item = self.dict_constructor()
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if item is not None:
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if data:
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self.push_data(item, self.cdata_key, data)
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self.item = self.push_data(self.item, name, item)
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else:
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self.item = self.push_data(self.item, name, data)
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else:
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self.item = None
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self.data = []
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self.path.pop()
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def characters(self, data):
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if not self.data:
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self.data = [data]
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else:
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self.data.append(data)
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def comments(self, data):
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if self.strip_whitespace:
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data = data.strip()
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self.item = self.push_data(self.item, self.comment_key, data)
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def push_data(self, item, key, data):
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if self.postprocessor is not None:
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result = self.postprocessor(self.path, key, data)
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if result is None:
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return item
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key, data = result
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if item is None:
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item = self.dict_constructor()
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try:
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value = item[key]
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if isinstance(value, list):
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value.append(data)
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else:
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item[key] = [value, data]
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except KeyError:
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if self._should_force_list(key, data):
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item[key] = [data]
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else:
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item[key] = data
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return item
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def _should_force_list(self, key, value):
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if not self.force_list:
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return False
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if isinstance(self.force_list, bool):
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return self.force_list
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try:
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return key in self.force_list
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except TypeError:
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return self.force_list(self.path[:-1], key, value)
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def parse(
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xml_input,
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encoding=None,
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expat=expat,
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process_namespaces=False,
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namespace_separator=":",
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disable_entities=True,
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process_comments=False,
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**kwargs
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):
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"""Parse the given XML input and convert it into a dictionary.
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`xml_input` can either be a `string`, a file-like object, or a generator of strings.
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If `xml_attribs` is `True`, element attributes are put in the dictionary
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among regular child elements, using `@` as a prefix to avoid collisions. If
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set to `False`, they are just ignored.
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Simple example::
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>>> import xmltodict
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>>> doc = xmltodict.parse(\"\"\"
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... <a prop="x">
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... <b>1</b>
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... <b>2</b>
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... </a>
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... \"\"\")
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>>> doc['a']['@prop']
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u'x'
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>>> doc['a']['b']
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[u'1', u'2']
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If `item_depth` is `0`, the function returns a dictionary for the root
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element (default behavior). Otherwise, it calls `item_callback` every time
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an item at the specified depth is found and returns `None` in the end
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(streaming mode).
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The callback function receives two parameters: the `path` from the document
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root to the item (name-attribs pairs), and the `item` (dict). If the
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callback's return value is false-ish, parsing will be stopped with the
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:class:`ParsingInterrupted` exception.
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Streaming example::
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>>> def handle(path, item):
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... print('path:%s item:%s' % (path, item))
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... return True
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...
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>>> xmltodict.parse(\"\"\"
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... <a prop="x">
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... <b>1</b>
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... <b>2</b>
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... </a>\"\"\", item_depth=2, item_callback=handle)
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path:[(u'a', {u'prop': u'x'}), (u'b', None)] item:1
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path:[(u'a', {u'prop': u'x'}), (u'b', None)] item:2
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The optional argument `postprocessor` is a function that takes `path`,
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`key` and `value` as positional arguments and returns a new `(key, value)`
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pair where both `key` and `value` may have changed. Usage example::
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>>> def postprocessor(path, key, value):
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... try:
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... return key + ':int', int(value)
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... except (ValueError, TypeError):
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... return key, value
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>>> xmltodict.parse('<a><b>1</b><b>2</b><b>x</b></a>',
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... postprocessor=postprocessor)
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ObjectDict([(u'a', ObjectDict([(u'b:int', [1, 2]), (u'b', u'x')]))])
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You can pass an alternate version of `expat` (such as `defusedexpat`) by
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using the `expat` parameter. E.g:
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>>> import defusedexpat
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>>> xmltodict.parse('<a>hello</a>', expat=defusedexpat.pyexpat)
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ObjectDict([(u'a', u'hello')])
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You can use the force_list argument to force lists to be created even
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when there is only a single child of a given level of hierarchy. The
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force_list argument is a tuple of keys. If the key for a given level
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of hierarchy is in the force_list argument, that level of hierarchy
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will have a list as a child (even if there is only one sub-element).
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The index_keys operation takes precedence over this. This is applied
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after any user-supplied postprocessor has already run.
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For example, given this input:
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<servers>
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<server>
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||||
<name>host1</name>
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<os>Linux</os>
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<interfaces>
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<interface>
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<name>em0</name>
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<ip_address>10.0.0.1</ip_address>
|
||||
</interface>
|
||||
</interfaces>
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||||
</server>
|
||||
</servers>
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||||
|
||||
If called with force_list=('interface',), it will produce
|
||||
this dictionary:
|
||||
{'servers':
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||||
{'server':
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||||
{'name': 'host1',
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||||
'os': 'Linux'},
|
||||
'interfaces':
|
||||
{'interface':
|
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[ {'name': 'em0', 'ip_address': '10.0.0.1' } ] } } }
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||||
|
||||
`force_list` can also be a callable that receives `path`, `key` and
|
||||
`value`. This is helpful in cases where the logic that decides whether
|
||||
a list should be forced is more complex.
|
||||
|
||||
|
||||
If `process_comment` is `True` then comment will be added with comment_key
|
||||
(default=`'#comment'`) to then tag which contains comment
|
||||
|
||||
For example, given this input:
|
||||
<a>
|
||||
<b>
|
||||
<!-- b comment -->
|
||||
<c>
|
||||
<!-- c comment -->
|
||||
1
|
||||
</c>
|
||||
<d>2</d>
|
||||
</b>
|
||||
</a>
|
||||
|
||||
If called with process_comment=True, it will produce
|
||||
this dictionary:
|
||||
'a': {
|
||||
'b': {
|
||||
'#comment': 'b comment',
|
||||
'c': {
|
||||
|
||||
'#comment': 'c comment',
|
||||
'#text': '1',
|
||||
},
|
||||
'd': '2',
|
||||
},
|
||||
}
|
||||
"""
|
||||
handler = _DictSAXHandler(namespace_separator=namespace_separator, **kwargs)
|
||||
if isinstance(xml_input, _unicode):
|
||||
if not encoding:
|
||||
encoding = "utf-8"
|
||||
xml_input = xml_input.encode(encoding)
|
||||
if not process_namespaces:
|
||||
namespace_separator = None
|
||||
parser = expat.ParserCreate(encoding, namespace_separator)
|
||||
try:
|
||||
parser.ordered_attributes = True
|
||||
except AttributeError:
|
||||
# Jython's expat does not support ordered_attributes
|
||||
pass
|
||||
parser.StartNamespaceDeclHandler = handler.startNamespaceDecl
|
||||
parser.StartElementHandler = handler.startElement
|
||||
parser.EndElementHandler = handler.endElement
|
||||
parser.CharacterDataHandler = handler.characters
|
||||
if process_comments:
|
||||
parser.CommentHandler = handler.comments
|
||||
parser.buffer_text = True
|
||||
if disable_entities:
|
||||
try:
|
||||
# Attempt to disable DTD in Jython's expat parser (Xerces-J).
|
||||
feature = "http://apache.org/xml/features/disallow-doctype-decl"
|
||||
parser._reader.setFeature(feature, True)
|
||||
except AttributeError:
|
||||
# For CPython / expat parser.
|
||||
# Anything not handled ends up here and entities aren't expanded.
|
||||
parser.DefaultHandler = lambda x: None
|
||||
# Expects an integer return; zero means failure -> expat.ExpatError.
|
||||
parser.ExternalEntityRefHandler = lambda *x: 1
|
||||
if hasattr(xml_input, "read"):
|
||||
parser.ParseFile(xml_input)
|
||||
elif isgenerator(xml_input):
|
||||
for chunk in xml_input:
|
||||
parser.Parse(chunk, False)
|
||||
parser.Parse(b"", True)
|
||||
else:
|
||||
parser.Parse(xml_input, True)
|
||||
return handler.item
|
||||
|
||||
|
||||
def _process_namespace(name, namespaces, ns_sep=":", attr_prefix="@"):
|
||||
if not namespaces:
|
||||
return name
|
||||
try:
|
||||
ns, name = name.rsplit(ns_sep, 1)
|
||||
except ValueError:
|
||||
pass
|
||||
else:
|
||||
ns_res = namespaces.get(ns.strip(attr_prefix))
|
||||
name = (
|
||||
"{}{}{}{}".format(
|
||||
attr_prefix if ns.startswith(attr_prefix) else "", ns_res, ns_sep, name
|
||||
)
|
||||
if ns_res
|
||||
else name
|
||||
)
|
||||
return name
|
||||
|
||||
|
||||
def _emit(
|
||||
key,
|
||||
value,
|
||||
content_handler,
|
||||
attr_prefix="@",
|
||||
cdata_key="#text",
|
||||
depth=0,
|
||||
preprocessor=None,
|
||||
pretty=False,
|
||||
newl="\n",
|
||||
indent="\t",
|
||||
namespace_separator=":",
|
||||
namespaces=None,
|
||||
full_document=True,
|
||||
expand_iter=None,
|
||||
):
|
||||
key = _process_namespace(key, namespaces, namespace_separator, attr_prefix)
|
||||
if preprocessor is not None:
|
||||
result = preprocessor(key, value)
|
||||
if result is None:
|
||||
return
|
||||
key, value = result
|
||||
if (
|
||||
not hasattr(value, "__iter__")
|
||||
or isinstance(value, _basestring)
|
||||
or isinstance(value, dict)
|
||||
):
|
||||
value = [value]
|
||||
for index, v in enumerate(value):
|
||||
if full_document and depth == 0 and index > 0:
|
||||
raise ValueError("document with multiple roots")
|
||||
if v is None:
|
||||
v = ObjectDict()
|
||||
elif isinstance(v, bool):
|
||||
if v:
|
||||
v = _unicode("true")
|
||||
else:
|
||||
v = _unicode("false")
|
||||
elif not isinstance(v, dict):
|
||||
if (
|
||||
expand_iter
|
||||
and hasattr(v, "__iter__")
|
||||
and not isinstance(v, _basestring)
|
||||
):
|
||||
v = ObjectDict(((expand_iter, v),))
|
||||
else:
|
||||
v = _unicode(v)
|
||||
if isinstance(v, _basestring):
|
||||
v = ObjectDict(((cdata_key, v),))
|
||||
cdata = None
|
||||
attrs = ObjectDict()
|
||||
children = []
|
||||
for ik, iv in v.items():
|
||||
if ik == cdata_key:
|
||||
cdata = iv
|
||||
continue
|
||||
if ik.startswith(attr_prefix):
|
||||
ik = _process_namespace(
|
||||
ik, namespaces, namespace_separator, attr_prefix
|
||||
)
|
||||
if ik == "@xmlns" and isinstance(iv, dict):
|
||||
for k, v in iv.items():
|
||||
attr = "xmlns{}".format(":{}".format(k) if k else "")
|
||||
attrs[attr] = _unicode(v)
|
||||
continue
|
||||
if not isinstance(iv, _unicode):
|
||||
iv = _unicode(iv)
|
||||
attrs[ik[len(attr_prefix) :]] = iv
|
||||
continue
|
||||
children.append((ik, iv))
|
||||
if pretty:
|
||||
content_handler.ignorableWhitespace(depth * indent)
|
||||
content_handler.startElement(key, AttributesImpl(attrs))
|
||||
if pretty and children:
|
||||
content_handler.ignorableWhitespace(newl)
|
||||
for child_key, child_value in children:
|
||||
_emit(
|
||||
child_key,
|
||||
child_value,
|
||||
content_handler,
|
||||
attr_prefix,
|
||||
cdata_key,
|
||||
depth + 1,
|
||||
preprocessor,
|
||||
pretty,
|
||||
newl,
|
||||
indent,
|
||||
namespaces=namespaces,
|
||||
namespace_separator=namespace_separator,
|
||||
expand_iter=expand_iter,
|
||||
)
|
||||
if cdata is not None:
|
||||
content_handler.characters(cdata)
|
||||
if pretty and children:
|
||||
content_handler.ignorableWhitespace(depth * indent)
|
||||
content_handler.endElement(key)
|
||||
if pretty and depth:
|
||||
content_handler.ignorableWhitespace(newl)
|
||||
|
||||
|
||||
def unparse(
|
||||
input_dict,
|
||||
output=None,
|
||||
encoding="utf-8",
|
||||
full_document=True,
|
||||
short_empty_elements=False,
|
||||
**kwargs
|
||||
):
|
||||
"""Emit an XML document for the given `input_dict` (reverse of `parse`).
|
||||
|
||||
The resulting XML document is returned as a string, but if `output` (a
|
||||
file-like object) is specified, it is written there instead.
|
||||
|
||||
Dictionary keys prefixed with `attr_prefix` (default=`'@'`) are interpreted
|
||||
as XML node attributes, whereas keys equal to `cdata_key`
|
||||
(default=`'#text'`) are treated as character data.
|
||||
|
||||
The `pretty` parameter (default=`False`) enables pretty-printing. In this
|
||||
mode, lines are terminated with `'\n'` and indented with `'\t'`, but this
|
||||
can be customized with the `newl` and `indent` parameters.
|
||||
|
||||
"""
|
||||
if full_document and len(input_dict) != 1:
|
||||
raise ValueError("Document must have exactly one root.")
|
||||
must_return = False
|
||||
if output is None:
|
||||
output = StringIO()
|
||||
must_return = True
|
||||
if short_empty_elements:
|
||||
content_handler = XMLGenerator(output, encoding, True)
|
||||
else:
|
||||
content_handler = XMLGenerator(output, encoding)
|
||||
if full_document:
|
||||
content_handler.startDocument()
|
||||
for key, value in input_dict.items():
|
||||
_emit(key, value, content_handler, full_document=full_document, **kwargs)
|
||||
if full_document:
|
||||
content_handler.endDocument()
|
||||
if must_return:
|
||||
value = output.getvalue()
|
||||
try: # pragma no cover
|
||||
value = value.decode(encoding)
|
||||
except AttributeError: # pragma no cover
|
||||
pass
|
||||
return value
|
||||
|
||||
|
||||
if __name__ == "__main__": # pragma: no cover
|
||||
import sys
|
||||
import marshal
|
||||
|
||||
try:
|
||||
stdin = sys.stdin.buffer
|
||||
stdout = sys.stdout.buffer
|
||||
except AttributeError:
|
||||
stdin = sys.stdin
|
||||
stdout = sys.stdout
|
||||
|
||||
(item_depth,) = sys.argv[1:]
|
||||
item_depth = int(item_depth)
|
||||
|
||||
def handle_item(path, item):
|
||||
marshal.dump((path, item), stdout)
|
||||
return True
|
||||
|
||||
try:
|
||||
root = parse(
|
||||
stdin,
|
||||
item_depth=item_depth,
|
||||
item_callback=handle_item,
|
||||
dict_constructor=dict,
|
||||
)
|
||||
if item_depth == 0:
|
||||
handle_item([], root)
|
||||
except KeyboardInterrupt:
|
||||
pass
|
||||
@ -25,9 +25,6 @@ RUN wget --progress=dot:giga "https://developer.arm.com/-/media/Files/downloads/
|
||||
for file in * ; do ln -s "${PWD}/${file}" "/usr/bin/${file}" ; done && \
|
||||
cd / && arm-none-eabi-gcc -v && arm-none-eabi-gdb -v
|
||||
|
||||
RUN wget --progress=dot:giga -O - https://bootstrap.pypa.io/pip/2.7/get-pip.py | python2 && \
|
||||
pip install --no-cache-dir lxml==4.6.3
|
||||
|
||||
RUN git clone --depth 1 --branch v0.4.1 https://github.com/atomicobject/heatshrink.git && \
|
||||
cd heatshrink && make && mv ./heatshrink /usr/local/bin/heatshrink
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user