2 # Author: Zoltan Varga (vargaz@gmail.com)
7 # This is a mono support mode for gdb 7.0 and later
9 # - copy/symlink this file to the directory where the mono executable lives.
10 # - run mono under gdb, or attach to a mono process started with --debug=gdb using gdb.
18 def __init__(self, val):
22 if int(self.val.cast (gdb.lookup_type ("guint64"))) == 0:
25 obj = self.val.cast (gdb.lookup_type ("MonoString").pointer ()).dereference ()
31 val = (chars.cast(gdb.lookup_type ("gint64")) + (i * 2)).cast(gdb.lookup_type ("gunichar2").pointer ()).dereference ()
41 def stringify_class_name(ns, name):
50 return "%s.%s" % (ns, name)
55 def __init__(self, val, class_ns, class_name):
57 self.class_ns = class_ns
58 self.class_name = class_name
61 obj = self.val.cast (gdb.lookup_type ("MonoArray").pointer ()).dereference ()
62 length = obj ['max_length']
63 return "%s [%d]" % (stringify_class_name (self.class_ns, self.class_name [0:len(self.class_name) - 2]), int(length))
68 def __init__(self, val):
69 if str(val.type)[-1] == "&":
70 self.val = val.address.cast (gdb.lookup_type ("MonoObject").pointer ())
72 self.val = val.cast (gdb.lookup_type ("MonoObject").pointer ())
75 def __init__(self,obj):
77 self.iter = self.obj.type.fields ().__iter__ ()
84 field = self.iter.next ()
86 if str(self.obj [field.name].type) == "object":
88 return (field.name, self.obj [field.name].cast (gdb.lookup_type ("void").pointer ()))
90 return (field.name, self.obj [field.name])
93 return (field.name, self.obj.cast (gdb.lookup_type ("%s" % (field.name))))
96 # FIXME: It would be easier if gdb.Value would support iteration itself
97 # It would also be better if we could return None
98 if int(self.val.cast (gdb.lookup_type ("guint64"))) == 0:
101 obj = self.val.dereference ()
102 class_ns = obj ['vtable'].dereference ()['klass'].dereference ()['name_space'].string ()
103 class_name = obj ['vtable'].dereference ()['klass'].dereference ()['name'].string ()
104 if class_name [-2:len(class_name)] == "[]":
105 return {}.__iter__ ()
106 gdb_type = gdb.lookup_type ("struct %s_%s" % (class_ns.replace (".", "_"), class_name))
107 return self._iterator(obj.cast (gdb_type))
109 print sys.exc_info ()[0]
110 print sys.exc_info ()[1]
111 return {}.__iter__ ()
114 if int(self.val.cast (gdb.lookup_type ("guint64"))) == 0:
117 obj = self.val.dereference ()
118 class_ns = obj ['vtable'].dereference ()['klass'].dereference ()['name_space'].string ()
119 class_name = obj ['vtable'].dereference ()['klass'].dereference ()['name'].string ()
120 if class_ns == "System" and class_name == "String":
121 return StringPrinter (self.val).to_string ()
122 if class_name [-2:len(class_name)] == "[]":
123 return ArrayPrinter (self.val,class_ns,class_name).to_string ()
126 gdb_type = gdb.lookup_type ("struct %s.%s" % (class_ns, class_name))
128 # Maybe there is no debug info for that type
129 return "%s.%s" % (class_ns, class_name)
130 #return obj.cast (gdb_type)
131 return "%s.%s" % (class_ns, class_name)
134 print sys.exc_info ()[0]
135 print sys.exc_info ()[1]
136 # FIXME: This can happen because we don't have liveness information
137 return self.val.cast (gdb.lookup_type ("guint64"))
139 class MonoMethodPrinter:
140 "Print a MonoMethod structure"
142 def __init__(self, val):
146 if int(self.val.cast (gdb.lookup_type ("guint64"))) == 0:
148 val = self.val.dereference ()
149 klass = val ["klass"].dereference ()
150 class_name = stringify_class_name (klass ["name_space"].string (), klass ["name"].string ())
151 return "\"%s:%s ()\"" % (class_name, val ["name"].string ())
152 # This returns more info but requires calling into the inferior
153 #return "\"%s\"" % (gdb.parse_and_eval ("mono_method_full_name (%s, 1)" % (str (int (self.val.cast (gdb.lookup_type ("guint64")))))).string ())
155 class MonoClassPrinter:
156 "Print a MonoClass structure"
158 def __init__(self, val):
161 def to_string_inner(self, add_quotes):
162 if int(self.val.cast (gdb.lookup_type ("guint64"))) == 0:
164 klass = self.val.dereference ()
165 class_name = stringify_class_name (klass ["name_space"].string (), klass ["name"].string ())
167 return "\"%s\"" % (class_name)
170 # This returns more info but requires calling into the inferior
171 #return "\"%s\"" % (gdb.parse_and_eval ("mono_type_full_name (&((MonoClass*)%s)->byval_arg)" % (str (int ((self.val).cast (gdb.lookup_type ("guint64")))))))
175 return self.to_string_inner (True)
177 #print sys.exc_info ()[0]
178 #print sys.exc_info ()[1]
179 return str(self.val.cast (gdb.lookup_type ("gpointer")))
181 class MonoGenericInstPrinter:
182 "Print a MonoGenericInst structure"
184 def __init__(self, val):
188 inst = self.val.dereference ()
189 inst_len = inst ["type_argc"]
190 inst_args = inst ["type_argv"]
192 for i in range(0, inst_len):
194 type_printer = MonoTypePrinter (inst_args [i])
196 inst_str = inst_str + ", "
197 inst_str = inst_str + type_printer.to_string ()
200 class MonoGenericClassPrinter:
201 "Print a MonoGenericClass structure"
203 def __init__(self, val):
206 def to_string_inner(self):
207 gclass = self.val.dereference ()
208 container_str = str(gclass ["container_class"])
209 class_inst = gclass ["context"]["class_inst"]
211 if int(class_inst.cast (gdb.lookup_type ("guint64"))) != 0:
212 class_inst_str = str(class_inst)
213 method_inst = gclass ["context"]["method_inst"]
215 if int(method_inst.cast (gdb.lookup_type ("guint64"))) != 0:
216 method_inst_str = str(method_inst)
217 return "%s, [%s], [%s]>" % (container_str, class_inst_str, method_inst_str)
221 return self.to_string_inner ()
223 #print sys.exc_info ()[0]
224 #print sys.exc_info ()[1]
225 return str(self.val.cast (gdb.lookup_type ("gpointer")))
227 class MonoTypePrinter:
228 "Print a MonoType structure"
230 def __init__(self, val):
233 def to_string_inner(self, csharp):
235 t = self.val.dereference ()
237 kind = str (t ["type"]).replace ("MONO_TYPE_", "").lower ()
241 p = MonoClassPrinter(t ["data"]["klass"])
242 info = p.to_string ()
243 elif kind == "genericinst":
244 info = str(t ["data"]["generic_class"])
247 return "{%s, %s}" % (kind, info)
249 return "{%s}" % (kind)
251 #print sys.exc_info ()[0]
252 #print sys.exc_info ()[1]
253 return str(self.val.cast (gdb.lookup_type ("gpointer")))
256 return self.to_string_inner (False)
258 class MonoMethodRgctxPrinter:
259 "Print a MonoMethodRgctx structure"
261 def __init__(self, val):
265 rgctx = self.val.dereference ()
266 klass = rgctx ["class_vtable"].dereference () ["klass"]
267 klass_printer = MonoClassPrinter (klass)
268 inst = rgctx ["method_inst"].dereference ()
269 inst_len = inst ["type_argc"]
270 inst_args = inst ["type_argv"]
272 for i in range(0, inst_len):
274 type_printer = MonoTypePrinter (inst_args [i])
276 inst_str = inst_str + ", "
277 inst_str = inst_str + type_printer.to_string ()
278 return "MRGCTX[%s, [%s]]" % (klass_printer.to_string(), inst_str)
280 def lookup_pretty_printer(val):
283 return ObjectPrinter (val)
284 if t[0:5] == "class" and t[-1] == "&":
285 return ObjectPrinter (val)
287 return StringPrinter (val)
288 if t == "MonoMethod *":
289 return MonoMethodPrinter (val)
290 if t == "MonoClass *":
291 return MonoClassPrinter (val)
292 if t == "MonoType *":
293 return MonoTypePrinter (val)
294 if t == "MonoGenericInst *":
295 return MonoGenericInstPrinter (val)
296 if t == "MonoGenericClass *":
297 return MonoGenericClassPrinter (val)
298 if t == "MonoMethodRuntimeGenericContext *":
299 return MonoMethodRgctxPrinter (val)
302 def register_csharp_printers(obj):
303 "Register C# pretty-printers with objfile Obj."
308 obj.pretty_printers.append (lookup_pretty_printer)
310 # This command will flush the debugging info collected by the runtime
311 class XdbCommand (gdb.Command):
313 super (XdbCommand, self).__init__ ("xdb", gdb.COMMAND_NONE,
314 gdb.COMPLETE_COMMAND)
316 def invoke(self, arg, from_tty):
317 gdb.execute ("call mono_xdebug_flush ()")
319 register_csharp_printers (gdb.current_objfile())
323 gdb.execute ("set environment MONO_XDEBUG gdb")
325 print "Mono support loaded."