To protect your data, the CISO officer has suggested users to enable GitLab 2FA as soon as possible.

universe.py 22.7 KB
Newer Older
Stefan Marr's avatar
Stefan Marr committed
1
from som.interpreter.interpreter import Interpreter
Stefan Marr's avatar
Stefan Marr committed
2
from som.interpreter.bytecodes   import Bytecodes 
Stefan Marr's avatar
Stefan Marr committed
3
4
from som.vm.symbol_table         import SymbolTable
from som.vmobjects.object        import Object
5
6
7
from som.vmobjects.clazz         import Class
from som.vmobjects.array         import Array
from som.vmobjects.symbol        import Symbol
Stefan Marr's avatar
Stefan Marr committed
8
from som.vmobjects.method        import Method
Stefan Marr's avatar
Stefan Marr committed
9
from som.vmobjects.integer       import Integer
10
from som.vmobjects.string        import String
11
from som.vmobjects.block         import Block, block_evaluation_primitive
12
from som.vmobjects.frame         import Frame
13
from som.vmobjects.biginteger    import BigInteger
14
from som.vmobjects.double        import Double
Stefan Marr's avatar
Stefan Marr committed
15

Stefan Marr's avatar
Stefan Marr committed
16
17
from som.vm.shell import Shell

18
19
import som.compiler.sourcecode_compiler as sourcecode_compiler

Stefan Marr's avatar
Stefan Marr committed
20
import os
21
22

class Exit(BaseException):
Stefan Marr's avatar
Stefan Marr committed
23
24
25
26
    """
    Use an exit exception to end program execution.
    We don't use sys.exit because it is a little problematic with RPython.
    """
27
28
    def __init__(self, code):
        self.code = code
Stefan Marr's avatar
Stefan Marr committed
29
30
31

class Universe(object):
    
32
    def __init__(self, avoid_exit = False):
Stefan Marr's avatar
Stefan Marr committed
33
34
35
36
37
        self._interpreter    = Interpreter(self)
        self._symbol_table   = SymbolTable()
        
        self._globals        = {}
        
Tobias Pape's avatar
Tobias Pape committed
38
39
40
41
42
43
        self.nilObject      = None
        self.trueObject     = None
        self.falseObject    = None
        self.objectClass    = None
        self.classClass     = None
        self.metaclassClass = None
Stefan Marr's avatar
Stefan Marr committed
44
        
Tobias Pape's avatar
Tobias Pape committed
45
46
47
48
49
50
51
52
53
54
55
56
        self.nilClass       = None
        self.integerClass   = None
        self.bigintegerClass= None
        self.arrayClass     = None
        self.methodClass    = None
        self.symbolClass    = None
        self.frameClass     = None
        self.primitiveClass = None
        self.systemClass    = None
        self.blockClass     = None
        self.stringClass    = None
        self.doubleClass    = None
Stefan Marr's avatar
Stefan Marr committed
57
58
        
        self._last_exit_code = 0
59
        self._avoid_exit     = avoid_exit
Tobias Pape's avatar
Tobias Pape committed
60
        self._dump_bytecodes = False
Stefan Marr's avatar
Stefan Marr committed
61
        self.classpath       = None
62

63
64
65
66
    def exit(self, error_code):
        if self._avoid_exit:
            self._last_exit_code = error_code
        else:
67
            raise Exit(error_code)
68
69
70
71
    
    def last_exit_code(self):
        return self._last_exit_code
    
72
73
74
    def get_interpreter(self):
        return self._interpreter
    
75
76
77
78
79
80
81
82
83
84
    def execute_method(self, class_name, selector):
        self._initialize_object_system()

        clazz = self.load_class(self.symbol_for(class_name))

        # Lookup the invokable on class
        invokable = clazz.get_class().lookup_invokable(self.symbol_for(selector))

        bootstrap_method = self._create_bootstrap_method()
        bootstrap_frame  = self._create_bootstrap_frame(bootstrap_method, clazz)
Stefan Marr's avatar
Stefan Marr committed
85
        
86
        return self.start(bootstrap_frame, invokable)
Stefan Marr's avatar
Stefan Marr committed
87
    
88
89
90
91
92
93
    def _create_bootstrap_method(self):
        # Create a fake bootstrap method to simplify later frame traversal
        bootstrap_method = self.new_method(self.symbol_for("bootstrap"), 1, 0)
        bootstrap_method.set_bytecode(0, Bytecodes.halt)
        bootstrap_method.set_number_of_locals(self.new_integer(0))
        bootstrap_method.set_maximum_number_of_stack_elements(self.new_integer(2))
Tobias Pape's avatar
Tobias Pape committed
94
        bootstrap_method.set_holder(self.systemClass)
95
        return bootstrap_method
96
    
97
98
99
100
101
102
    def _create_bootstrap_frame(self, bootstrap_method, receiver, arguments = None):
        # Create a fake bootstrap frame with the system object on the stack
        bootstrap_frame = self._interpreter.push_new_frame(bootstrap_method)
        bootstrap_frame.push(receiver)
        
        if arguments:
103
            bootstrap_frame.push(arguments)
104
        return bootstrap_frame
105
106
        
    
Stefan Marr's avatar
Stefan Marr committed
107
108
    def interpret(self, arguments):
        # Check for command line switches
109
        arguments = self.handle_arguments(arguments)
Stefan Marr's avatar
Stefan Marr committed
110
111

        # Initialize the known universe
112
113
        system_object = self._initialize_object_system()
        bootstrap_method = self._create_bootstrap_method()
Stefan Marr's avatar
Stefan Marr committed
114
        
115
116
117
118
119
120
121
        # Start the shell if no filename is given
        if len(arguments) == 0:
            shell = Shell(self, self._interpreter)
            shell.set_bootstrap_method(bootstrap_method)
            shell.start()
            return
        else:
122
123
124
            # Convert the arguments into an array
            arguments_array = self.new_array_with_strings(arguments)
            bootstrap_frame = self._create_bootstrap_frame(bootstrap_method, system_object, arguments_array)
125
            # Lookup the initialize invokable on the system class
Tobias Pape's avatar
Tobias Pape committed
126
            initialize = self.systemClass.lookup_invokable(self.symbol_for("initialize:"))
127
128
129
130
131
132
133
134
135

            self.start(bootstrap_frame, initialize)
    
    def start(self, bootstrap_frame, invokable):
        # Invoke the initialize invokable
        invokable.invoke(bootstrap_frame, self._interpreter)

        # Start the interpreter
        return self._interpreter.start()
Stefan Marr's avatar
Stefan Marr committed
136
    
137
    def handle_arguments(self, arguments):
Stefan Marr's avatar
Stefan Marr committed
138
139
140
141
142
143
144
145
        got_classpath  = False
        remaining_args = []

        i = 0
        while i < len(arguments):
            if arguments[i] == "-cp":
                if i + 1 >= len(arguments):
                    self._print_usage_and_exit()
146
                self.setup_classpath(arguments[i + 1])
Stefan Marr's avatar
Stefan Marr committed
147
148
149
150
151
152
                i += 1    # skip class path
                got_classpath = True
            elif arguments[i] == "-d":
                self._dump_bytecodes = True
            else:
                remaining_args.append(arguments[i])
Tobias Pape's avatar
Tobias Pape committed
153
            i += 1
Stefan Marr's avatar
Stefan Marr committed
154
155
156
    
        if not got_classpath:
            # Get the default class path of the appropriate size
Tobias Pape's avatar
Tobias Pape committed
157
            self.classpath = self._setup_default_classpath()
Stefan Marr's avatar
Stefan Marr committed
158
159
160
161
162
163
164

        # check remaining args for class paths, and strip file extension
        i = 0
        while i < len(remaining_args):
            split = self._get_path_class_ext(remaining_args[i])

            if split[0] != "":  # there was a path
Tobias Pape's avatar
Tobias Pape committed
165
                self.classpath.insert(0, split[0])
Stefan Marr's avatar
Stefan Marr committed
166
167
168
169
170
171
        
            remaining_args[i] = split[1]
            i += 1
        
        return remaining_args
    
172
    def setup_classpath(self, cp):
Tobias Pape's avatar
Tobias Pape committed
173
        self.classpath = cp.split(os.pathsep)
Stefan Marr's avatar
Stefan Marr committed
174
    
175
176
177
    def _setup_default_classpath(self):
        return ['.']
    
Stefan Marr's avatar
Stefan Marr committed
178
179
180
    # take argument of the form "../foo/Test.som" and return
    # "../foo", "Test", "som"
    def _get_path_class_ext(self, path):
181
        path_and_file = path.rsplit(os.sep, 1)
182
183
184
185
186
187
188
189
190
191
192
        if len(path_and_file) <= 1:
            path = ""
        else:
            path = path_and_file[0]
        file_and_ext  = path_and_file[-1].rsplit(".", 1)
        if len(file_and_ext) <= 1:
            ext = ""
        else:
            ext = file_and_ext[-1]
        file_name = file_and_ext[0]
        return (path, file_name, ext)
193
194
195
    
    def _print_usage_and_exit(self):
        # Print the usage
196
197
198
199
200
201
        std_println("Usage: som [-options] [args...]                          ")
        std_println("                                                         ")
        std_println("where options include:                                   ")
        std_println("    -cp <directories separated by " + os.pathsep     + ">")
        std_println("                  set search path for application classes")
        std_println("    -d            enable disassembling")
202
203
204

        # Exit
        self.exit(0)
Stefan Marr's avatar
Stefan Marr committed
205

206
    def _initialize_object_system(self):
Stefan Marr's avatar
Stefan Marr committed
207
        # Allocate the nil object
Tobias Pape's avatar
Tobias Pape committed
208
        self.nilObject = Object(None)
Stefan Marr's avatar
Stefan Marr committed
209
210

        # Allocate the Metaclass classes
Tobias Pape's avatar
Tobias Pape committed
211
        self.metaclassClass = self.new_metaclass_class()
Stefan Marr's avatar
Stefan Marr committed
212
213

        # Allocate the rest of the system classes
Tobias Pape's avatar
Tobias Pape committed
214
215
216
217
218
219
220
221
222
223
224
225
        self.objectClass     = self.new_system_class()
        self.nilClass        = self.new_system_class()
        self.classClass      = self.new_system_class()
        self.arrayClass      = self.new_system_class()
        self.symbolClass     = self.new_system_class()
        self.methodClass     = self.new_system_class()
        self.integerClass    = self.new_system_class()
        self.bigintegerClass = self.new_system_class()
        self.frameClass      = self.new_system_class()
        self.primitiveClass  = self.new_system_class()
        self.stringClass     = self.new_system_class()
        self.doubleClass     = self.new_system_class()
Stefan Marr's avatar
Stefan Marr committed
226
227

        # Setup the class reference for the nil object
Tobias Pape's avatar
Tobias Pape committed
228
        self.nilObject.set_class(self.nilClass)
Stefan Marr's avatar
Stefan Marr committed
229
230

        # Initialize the system classes
Tobias Pape's avatar
Tobias Pape committed
231
232
233
234
235
236
237
238
239
240
241
242
243
        self._initialize_system_class(self.objectClass,                 None, "Object")
        self._initialize_system_class(self.classClass,      self.objectClass, "Class")
        self._initialize_system_class(self.metaclassClass,   self.classClass, "Metaclass")
        self._initialize_system_class(self.nilClass,        self.objectClass, "Nil")
        self._initialize_system_class(self.arrayClass,      self.objectClass, "Array")
        self._initialize_system_class(self.methodClass,      self.arrayClass, "Method")
        self._initialize_system_class(self.symbolClass,     self.objectClass, "Symbol")
        self._initialize_system_class(self.integerClass,    self.objectClass, "Integer")
        self._initialize_system_class(self.bigintegerClass, self.objectClass, "BigInteger")
        self._initialize_system_class(self.frameClass,       self.arrayClass, "Frame")
        self._initialize_system_class(self.primitiveClass,  self.objectClass, "Primitive")
        self._initialize_system_class(self.stringClass,     self.objectClass, "String")
        self._initialize_system_class(self.doubleClass,     self.objectClass, "Double")
Stefan Marr's avatar
Stefan Marr committed
244
245

        # Load methods and fields into the system classes
Tobias Pape's avatar
Tobias Pape committed
246
247
248
249
250
251
252
253
254
255
256
257
258
        self._load_system_class(self.objectClass)
        self._load_system_class(self.classClass)
        self._load_system_class(self.metaclassClass)
        self._load_system_class(self.nilClass)
        self._load_system_class(self.arrayClass)
        self._load_system_class(self.methodClass)
        self._load_system_class(self.symbolClass)
        self._load_system_class(self.integerClass)
        self._load_system_class(self.bigintegerClass)
        self._load_system_class(self.frameClass)
        self._load_system_class(self.primitiveClass)
        self._load_system_class(self.stringClass)
        self._load_system_class(self.doubleClass)
Stefan Marr's avatar
Stefan Marr committed
259
260

        # Load the generic block class
Tobias Pape's avatar
Tobias Pape committed
261
        self.blockClass = self.load_class(self.symbol_for("Block"))
Stefan Marr's avatar
Stefan Marr committed
262
263

        # Setup the true and false objects
Tobias Pape's avatar
Tobias Pape committed
264
265
        self.trueObject  = self.new_instance(self.load_class(self.symbol_for("True")))
        self.falseObject = self.new_instance(self.load_class(self.symbol_for("False")))
Stefan Marr's avatar
Stefan Marr committed
266
267

        # Load the system class and create an instance of it
Tobias Pape's avatar
Tobias Pape committed
268
269
        self.systemClass = self.load_class(self.symbol_for("System"))
        system_object = self.new_instance(self.systemClass)
Stefan Marr's avatar
Stefan Marr committed
270
271

        # Put special objects and classes into the dictionary of globals
Tobias Pape's avatar
Tobias Pape committed
272
273
274
        self.set_global(self.symbol_for("nil"),    self.nilObject)
        self.set_global(self.symbol_for("true"),   self.trueObject)
        self.set_global(self.symbol_for("false"),  self.falseObject)
275
        self.set_global(self.symbol_for("system"), system_object)
Tobias Pape's avatar
Tobias Pape committed
276
277
        self.set_global(self.symbol_for("System"), self.systemClass)
        self.set_global(self.symbol_for("Block"),  self.blockClass)
278
279
        return system_object
    
280
281
282
283
284
285
286
287
288
    def symbol_for(self, string):
        # Lookup the symbol in the symbol table
        result = self._symbol_table.lookup(string)
        if result:
            return result
        
        # Create a new symbol and return it
        result = self.new_symbol(string)
        return result
289
290
291
    
    def new_array_with_length(self, length):
        # Allocate a new array and set its class to be the array class
Tobias Pape's avatar
Tobias Pape committed
292
293
        result = Array(self.nilObject)
        result.set_class(self.arrayClass)
294
295

        # Set the number of indexable fields to the given value (length)
Tobias Pape's avatar
Tobias Pape committed
296
        result.set_number_of_indexable_fields_and_clear(length, self.nilObject)
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321

        # Return the freshly allocated array
        return result
  
    def new_array_from_list(self, values):
        # Allocate a new array with the same length as the list
        result = self.new_array_with_length(len(values))

        # Copy all elements from the list into the array
        for i in range(len(values)):
            result.set_indexable_field(i, values[i])
    
        # Return the allocated and initialized array
        return result
  
    def new_array_with_strings(self, strings):
        # Allocate a new array with the same length as the string array
        result = self.new_array_with_length(len(strings))

        # Copy all elements from the string array into the array
        for i in range(len(strings)):
            result.set_indexable_field(i, self.new_string(strings[i]))
    
        # Return the allocated and initialized array
        return result
322
    
323
324
    def new_block(self, method, context_frame, arguments):
        # Allocate a new block and set its class to be the block class
Tobias Pape's avatar
Tobias Pape committed
325
        result = Block(self.nilObject)
326
327
328
329
330
331
332
333
334
335
336
        result.set_class(self._get_block_class(arguments))

        # Set the method and context of block
        result.set_method(method)
        result.set_context(context_frame)

        # Return the freshly allocated block
        return result

    def new_class(self, class_class):
        # Allocate a new class and set its class to be the given class class
Stefan Marr's avatar
Stefan Marr committed
337
        result = Class(self, class_class.get_number_of_instance_fields())
338
339
340
341
342
343
344
        result.set_class(class_class)

        # Return the freshly allocated class
        return result

    def new_frame(self, previous_frame, method):
        # Allocate a new frame and set its class to be the frame class
Tobias Pape's avatar
Tobias Pape committed
345
346
        result = Frame(self.nilObject)
        result.set_class(self.frameClass)
347
348
349
350
351
352
353

        # Compute the maximum number of stack locations (including arguments,
        # locals and extra buffer to support doesNotUnderstand) and set the
        # number of indexable fields accordingly
        length = (method.get_number_of_arguments() +
                  method.get_number_of_locals().get_embedded_integer() +
                  method.get_maximum_number_of_stack_elements().get_embedded_integer() + 2)
Tobias Pape's avatar
Tobias Pape committed
354
        result.set_number_of_indexable_fields_and_clear(length, self.nilObject)
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369

        # Set the method of the frame and the previous frame
        result.set_method(method)
        if previous_frame:
            result.set_previous_frame(previous_frame)

        # Reset the stack pointer and the bytecode index
        result.reset_stack_pointer()
        result.set_bytecode_index(0)

        # Return the freshly allocated frame
        return result

    def new_method(self, signature, num_bytecodes, num_literals):
        # Allocate a new method and set its class to be the method class
Tobias Pape's avatar
Tobias Pape committed
370
371
        result = Method(self.nilObject)
        result.set_class(self.methodClass)
372
373
374
375

        # Set the signature and the number of bytecodes
        result.set_signature(signature)
        result.set_number_of_bytecodes(num_bytecodes)
Tobias Pape's avatar
Tobias Pape committed
376
        result.set_number_of_indexable_fields_and_clear(num_literals, self.nilObject)
377
378
379
380
381
382

        # Return the freshly allocated method
        return result

    def new_instance(self, instance_class):
        # Allocate a new instance and set its class to be the given class
Tobias Pape's avatar
Tobias Pape committed
383
        result = Object(self.nilObject, instance_class.get_number_of_instance_fields())
384
385
386
387
388
389
390
391
        result.set_class(instance_class)
 
        # Return the freshly allocated instance
        return result

 
    def new_integer(self, value):
        # Allocate a new integer and set its class to be the integer class
Tobias Pape's avatar
Tobias Pape committed
392
393
        result = Integer(self.nilObject)
        result.set_class(self.integerClass)
394
395
396
397
398
399
400
     
        # Set the embedded integer of the newly allocated integer
        result.set_embedded_integer(value)
     
        # Return the freshly allocated integer
        return result
 
401
    def new_biginteger(self, value):
402
        # Allocate a new integer and set its class to be the integer class
Tobias Pape's avatar
Tobias Pape committed
403
404
        result = BigInteger(self.nilObject)
        result.set_class(self.bigintegerClass)
405
406
 
        # Set the embedded integer of the newly allocated integer
407
        result.set_embedded_biginteger(value)
408
409
410
411
412
413
414
 
        # Return the freshly allocated integer
        return result
 
 
    def new_double(self, value):
        # Allocate a new integer and set its class to be the double class
Tobias Pape's avatar
Tobias Pape committed
415
416
        result = Double(self.nilObject)
        result.set_class(self.doubleClass)
417
418
419
420
421
422
423
 
        # Set the embedded double of the newly allocated double
        result.set_embedded_double(value)
 
        # Return the freshly allocated double
        return result
    
424
425
426
427
428
429
430
431
432
433
    def new_metaclass_class(self):
        # Allocate the metaclass classes
        result = Class(self)
        result.set_class(Class(self))

        # Setup the metaclass hierarchy
        result.get_class().set_class(result)

        # Return the freshly allocated metaclass class
        return result
434
435
436

    def new_string(self, embedded_string):
        # Allocate a new string and set its class to be the string class
Tobias Pape's avatar
Tobias Pape committed
437
438
        result = String(self.nilObject)
        result.set_class(self.stringClass)
439
440
441
442
443
444
 
        # Put the embedded string into the new string
        result.set_embedded_string(embedded_string)
 
        # Return the freshly allocated string
        return result
445
    
446
447
    def new_symbol(self, string):
        # Allocate a new symbol and set its class to be the symbol class
Tobias Pape's avatar
Tobias Pape committed
448
449
        result = Symbol(self.nilObject)
        result.set_class(self.symbolClass)
450
451
452
453
454
455
456
457
458
459

        # Put the string into the symbol
        result.set_string(string)

        # Insert the new symbol into the symbol table
        self._symbol_table.insert(result)

        # Return the freshly allocated symbol
        return result
      
460
461
462
463
464
465
    def new_system_class(self):
        # Allocate the new system class
        system_class = Class(self)

        # Setup the metaclass hierarchy
        system_class.set_class(Class(self))
Tobias Pape's avatar
Tobias Pape committed
466
        system_class.get_class().set_class(self.metaclassClass)
467
468
469
470
471
472
473

        # Return the freshly allocated system class
        return system_class
    
    def _initialize_system_class(self, system_class, super_class, name):
        # Initialize the superclass hierarchy
        if super_class:
474
            system_class.set_super_class(super_class)
475
476
            system_class.get_class().set_super_class(super_class.get_class())
        else:
Tobias Pape's avatar
Tobias Pape committed
477
            system_class.get_class().set_super_class(self.classClass)
478
479
480
481
482
483
484
485
486
487
488
489
    

        # Initialize the array of instance fields
        system_class.set_instance_fields(self.new_array_with_length(0))
        system_class.get_class().set_instance_fields(self.new_array_with_length(0))

        # Initialize the array of instance invokables
        system_class.set_instance_invokables(self.new_array_with_length(0))
        system_class.get_class().set_instance_invokables(self.new_array_with_length(0))

        # Initialize the name of the system class
        system_class.set_name(self.symbol_for(name))
490
        system_class.get_class().set_name(self.symbol_for(name + " class"))
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511

        # Insert the system class into the dictionary of globals
        self.set_global(system_class.get_name(), system_class)
    
    
    def get_global(self, name):
        # Return the global with the given name if it's in the dictionary of globals
        if self.has_global(name):
            return self._globals[name]

        # Global not found
        return None

    def set_global(self, name, value):
        # Insert the given value into the dictionary of globals
        self._globals[name] = value
  

    def has_global(self, name):
        # Returns if the universe has a value for the global of the given name
        return name in self._globals
512
    
513
    def _get_block_class(self, number_of_arguments = None):
514
515
        if not number_of_arguments:
            # Get the generic block class
Tobias Pape's avatar
Tobias Pape committed
516
            return self.blockClass
517
518
519
520
521
522
523
524
525
526
527
        
        # Compute the name of the block class with the given number of
        # arguments
        name = self.symbol_for("Block" + str(number_of_arguments))

        # Lookup the specific block class in the dictionary of globals and
        # return it
        if self.has_global(name):
            return self.get_global(name)

        # Get the block class for blocks with the given number of arguments
Stefan Marr's avatar
Stefan Marr committed
528
        result = self._load_class(name, None)
529
530

        # Add the appropriate value primitive to the block class
531
        result.add_instance_primitive(block_evaluation_primitive(number_of_arguments, self))
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556

        # Insert the block class into the dictionary of globals
        self.set_global(name, result)

        # Return the loaded block class
        return result

    def load_class(self, name):
        # Check if the requested class is already in the dictionary of globals
        if self.has_global(name):
            return self.get_global(name)

        # Load the class
        result = self._load_class(name, None)

        # Load primitives (if necessary) and return the resulting class
        if result and result.has_primitives():
            result.load_primitives()
    
        return result

    def _load_system_class(self, system_class):
        # Load the system class
        result = self._load_class(system_class.get_name(), system_class)

557
558
559
560
561
562
563
        if not result:
            error_println(system_class.get_name().get_string()
                   + " class could not be loaded. It is likely that the "
                   + " class path has not been initialized properly. "
                   + "Please make sure that the '-cp' parameter is given on the command-line.")
            self.exit(200)

564
565
566
567
568
569
        # Load primitives if necessary
        if result.has_primitives():
            result.load_primitives()

    def _load_class(self, name, system_class):
        # Try loading the class from all different paths
Tobias Pape's avatar
Tobias Pape committed
570
        for cpEntry in self.classpath:
571
572
            try:
                # Load the class from a file and return the loaded class
573
                result = sourcecode_compiler.compile_class_from_file(cpEntry, name.get_string(), system_class, self)
574
                if self._dump_bytecodes:
575
576
577
                    from som.compiler.disassembler import dump
                    dump(result.get_class())
                    dump(result)
578
579
580
581
582
583
584
585

                return result
            except IOError:
                # Continue trying different paths
                pass

        # The class could not be found.
        return None
586
587
588
589
    
    def load_shell_class(self, stmt):
        # Load the class from a stream and return the loaded class
        result = sourcecode_compiler.compile_class_from_string(stmt, None, self)
Stefan Marr's avatar
Stefan Marr committed
590
        if self._dump_bytecodes:
591
592
            from som.compiler.disassembler import dump
            dump(result)
593
594
        return result

595
def error_print(msg):
596
    os.write(2, msg)
597

598
def error_println(msg = ""):
599
    os.write(2, msg + "\n")
600

601
def std_print(msg):
602
    print msg,
603

604
def std_println(msg=""):
605
606
    print msg

607
608
609
610
611
612
613

def main(args):
    u = Universe()
    u.interpret(args[1:])
    u.exit(0)

if __name__ == '__main__':
614
615
616
617
618
    import sys
    try:
        main(sys.argv)
    except Exit as e:
        sys.exit(e.code)