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-rw-r--r--gdb/libdom.py157
1 files changed, 157 insertions, 0 deletions
diff --git a/gdb/libdom.py b/gdb/libdom.py
new file mode 100644
index 0000000..65286e3
--- /dev/null
+++ b/gdb/libdom.py
@@ -0,0 +1,157 @@
+# LibDOM related commands and utilities for gdb
+
+import gdb
+
+def dom_get_type_ptr(typename):
+ return gdb.lookup_type(typename).pointer()
+
+def dom_node_at(ptr):
+ nodetype = dom_get_type_ptr("dom_node_internal")
+ return ptr.cast(nodetype).dereference()
+
+def dom_document_at(ptr):
+ doctype = dom_get_type_ptr("dom_document")
+ return ptr.cast(doctype).dereference()
+
+def dom_node_type(node):
+ return node["type"]
+
+def dom_node_refcnt(node):
+ return node["base"]["refcnt"]
+
+def lwc_string_value(strptr):
+ cptr = strptr+1
+ charptr = cptr.cast(dom_get_type_ptr("char"))
+ return charptr.string()
+
+def dom_string__is_intern(intstr):
+ return str(intstr['type']) == "DOM_STRING_INTERNED"
+
+def cdata_string_value(cdata):
+ cptr = cdata['ptr']
+ charptr = cptr.cast(dom_get_type_ptr("char"))
+ return charptr.string()
+
+def dom_string_value(stringptr):
+ intstr = stringptr.cast(dom_get_type_ptr("dom_string_internal")).dereference()
+ if intstr.address == gdb.parse_and_eval("(dom_string_internal*)0"):
+ return ""
+ if dom_string__is_intern(intstr):
+ return lwc_string_value(intstr['data']['intern'])
+ else:
+ return cdata_string_value(intstr['data']['cdata'])
+
+def dom_node_name(node):
+ namestr = node["name"]
+ return " '%s'" % dom_string_value(namestr)
+
+def dom_node_pending_offset():
+ return gdb.parse_and_eval("(int)&((struct dom_node_internal *)0)->pending_list")
+
+def dom_print_node(node, prefix = ""):
+ print("%s%s @ %s [%s]%s" % (prefix, dom_node_type(node),
+ node.address, dom_node_refcnt(node),
+ dom_node_name(node)))
+
+def dom_walk_tree(node, prefix = ""):
+ dom_print_node(node, prefix)
+ current = node['first_child'].dereference()
+ while current.address != 0:
+ dom_walk_tree(current, "%s " % prefix)
+ current = current['next'].dereference()
+
+def dom_document_show(doc):
+ print "Node Tree:"
+ node = dom_node_at(doc.address)
+ dom_walk_tree(node, " ")
+ pending = doc['pending_nodes']
+ if pending['next'] != pending.address:
+ print "Pending Node trees:"
+ current_list_entry = pending['next']
+ while current_list_entry is not None:
+ voidp = current_list_entry.cast(dom_get_type_ptr("void"))
+ voidp = voidp - dom_node_pending_offset()
+ node = dom_node_at(voidp)
+ dom_walk_tree(node, " ")
+ current_list_entry = node['pending_list']['next']
+ if current_list_entry == pending.address:
+ current_list_entry = None
+
+
+class DOMCommand(gdb.Command):
+ """DOM related commands"""
+
+ def __init__(self):
+ gdb.Command.__init__(self, "dom", gdb.COMMAND_DATA,
+ gdb.COMPLETE_COMMAND, True)
+
+class DOMNodeCommand(gdb.Command):
+ """DOMNode related commands"""
+
+ def __init__(self):
+ gdb.Command.__init__(self, "dom node", gdb.COMMAND_DATA,
+ gdb.COMPLETE_COMMAND, True)
+
+class DOMDocumentCommand(gdb.Command):
+ """DOMDocument related commands"""
+
+ def __init__(self):
+ gdb.Command.__init__(self, "dom document", gdb.COMMAND_DATA,
+ gdb.COMPLETE_COMMAND, True)
+
+class DOMNodeShowCommand(gdb.Command):
+ """Show a node at a given address."""
+
+ def __init__(self):
+ gdb.Command.__init__(self, "dom node show", gdb.COMMAND_DATA,
+ gdb.COMPLETE_NONE, True)
+
+ def invoke(self, arg, from_tty):
+ args = gdb.string_to_argv(arg)
+ self._invoke(*args)
+
+ def _invoke(self, nodeptr):
+ _ptr = gdb.parse_and_eval(nodeptr)
+ node = dom_node_at(_ptr)
+ dom_print_node(node)
+
+class DOMNodeWalkCommand(gdb.Command):
+ """Walk a node tree at a given address."""
+
+ def __init__(self):
+ gdb.Command.__init__(self, "dom node walk", gdb.COMMAND_DATA,
+ gdb.COMPLETE_NONE, True)
+
+ def invoke(self, arg, from_tty):
+ args = gdb.string_to_argv(arg)
+ self._invoke(*args)
+
+ def _invoke(self, nodeptr):
+ _ptr = gdb.parse_and_eval(nodeptr)
+ node = dom_node_at(_ptr)
+ dom_walk_tree(node)
+
+class DOMDocumentShowCommand(gdb.Command):
+ """Show a document at a given address."""
+
+ def __init__(self):
+ gdb.Command.__init__(self, "dom document show", gdb.COMMAND_DATA,
+ gdb.COMPLETE_NONE, True)
+
+ def invoke(self, arg, from_tty):
+ args = gdb.string_to_argv(arg)
+ self._invoke(*args)
+
+ def _invoke(self, docptr):
+ _ptr = gdb.parse_and_eval(docptr)
+ doc = dom_document_at(_ptr)
+ dom_document_show(doc)
+
+DOMCommand()
+
+DOMNodeCommand()
+DOMNodeShowCommand()
+DOMNodeWalkCommand()
+
+DOMDocumentCommand()
+DOMDocumentShowCommand()