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- #!/usr/bin/env python
- #
- # Copyright 2012 the V8 project authors. All rights reserved.
- # Redistribution and use in source and binary forms, with or without
- # modification, are permitted provided that the following conditions are
- # met:
- #
- # * Redistributions of source code must retain the above copyright
- # notice, this list of conditions and the following disclaimer.
- # * Redistributions in binary form must reproduce the above
- # copyright notice, this list of conditions and the following
- # disclaimer in the documentation and/or other materials provided
- # with the distribution.
- # * Neither the name of Google Inc. nor the names of its
- # contributors may be used to endorse or promote products derived
- # from this software without specific prior written permission.
- #
- # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- #
- #
- # Emits a C++ file to be compiled and linked into libv8 to support postmortem
- # debugging tools. Most importantly, this tool emits constants describing V8
- # internals:
- #
- # v8dbg_type_CLASS__TYPE = VALUE Describes class type values
- # v8dbg_class_CLASS__FIELD__TYPE = OFFSET Describes class fields
- # v8dbg_parent_CLASS__PARENT Describes class hierarchy
- # v8dbg_frametype_NAME = VALUE Describes stack frame values
- # v8dbg_off_fp_NAME = OFFSET Frame pointer offsets
- # v8dbg_prop_NAME = OFFSET Object property offsets
- # v8dbg_NAME = VALUE Miscellaneous values
- #
- # These constants are declared as global integers so that they'll be present in
- # the generated libv8 binary.
- #
- # for py2/py3 compatibility
- from __future__ import print_function
- import io
- import re
- import sys
- #
- # Miscellaneous constants such as tags and masks used for object identification,
- # enumeration values used as indexes in internal tables, etc..
- #
- consts_misc = [
- { 'name': 'FirstNonstringType', 'value': 'FIRST_NONSTRING_TYPE' },
- { 'name': 'APIObjectType', 'value': 'JS_API_OBJECT_TYPE' },
- { 'name': 'SpecialAPIObjectType', 'value': 'JS_SPECIAL_API_OBJECT_TYPE' },
- { 'name': 'FirstContextType', 'value': 'FIRST_CONTEXT_TYPE' },
- { 'name': 'LastContextType', 'value': 'LAST_CONTEXT_TYPE' },
- { 'name': 'IsNotStringMask', 'value': 'kIsNotStringMask' },
- { 'name': 'StringTag', 'value': 'kStringTag' },
- { 'name': 'StringEncodingMask', 'value': 'kStringEncodingMask' },
- { 'name': 'TwoByteStringTag', 'value': 'kTwoByteStringTag' },
- { 'name': 'OneByteStringTag', 'value': 'kOneByteStringTag' },
- { 'name': 'StringRepresentationMask',
- 'value': 'kStringRepresentationMask' },
- { 'name': 'SeqStringTag', 'value': 'kSeqStringTag' },
- { 'name': 'ConsStringTag', 'value': 'kConsStringTag' },
- { 'name': 'ExternalStringTag', 'value': 'kExternalStringTag' },
- { 'name': 'SlicedStringTag', 'value': 'kSlicedStringTag' },
- { 'name': 'ThinStringTag', 'value': 'kThinStringTag' },
- { 'name': 'HeapObjectTag', 'value': 'kHeapObjectTag' },
- { 'name': 'HeapObjectTagMask', 'value': 'kHeapObjectTagMask' },
- { 'name': 'SmiTag', 'value': 'kSmiTag' },
- { 'name': 'SmiTagMask', 'value': 'kSmiTagMask' },
- { 'name': 'SmiValueShift', 'value': 'kSmiTagSize' },
- { 'name': 'SmiShiftSize', 'value': 'kSmiShiftSize' },
- { 'name': 'SystemPointerSize', 'value': 'kSystemPointerSize' },
- { 'name': 'SystemPointerSizeLog2', 'value': 'kSystemPointerSizeLog2' },
- { 'name': 'TaggedSize', 'value': 'kTaggedSize' },
- { 'name': 'TaggedSizeLog2', 'value': 'kTaggedSizeLog2' },
- { 'name': 'CodeKindFieldMask', 'value': 'Code::KindField::kMask' },
- { 'name': 'CodeKindFieldShift', 'value': 'Code::KindField::kShift' },
- { 'name': 'CodeKindBytecodeHandler',
- 'value': 'static_cast<int>(CodeKind::BYTECODE_HANDLER)' },
- { 'name': 'CodeKindInterpretedFunction',
- 'value': 'static_cast<int>(CodeKind::INTERPRETED_FUNCTION)' },
- { 'name': 'CodeKindBaseline',
- 'value': 'static_cast<int>(CodeKind::BASELINE)' },
- { 'name': 'OddballFalse', 'value': 'Oddball::kFalse' },
- { 'name': 'OddballTrue', 'value': 'Oddball::kTrue' },
- { 'name': 'OddballTheHole', 'value': 'Oddball::kTheHole' },
- { 'name': 'OddballNull', 'value': 'Oddball::kNull' },
- { 'name': 'OddballArgumentsMarker', 'value': 'Oddball::kArgumentsMarker' },
- { 'name': 'OddballUndefined', 'value': 'Oddball::kUndefined' },
- { 'name': 'OddballUninitialized', 'value': 'Oddball::kUninitialized' },
- { 'name': 'OddballOther', 'value': 'Oddball::kOther' },
- { 'name': 'OddballException', 'value': 'Oddball::kException' },
- { 'name': 'ContextRegister', 'value': 'kContextRegister.code()' },
- { 'name': 'ReturnRegister0', 'value': 'kReturnRegister0.code()' },
- { 'name': 'JSFunctionRegister', 'value': 'kJSFunctionRegister.code()' },
- { 'name': 'InterpreterBytecodeOffsetRegister',
- 'value': 'kInterpreterBytecodeOffsetRegister.code()' },
- { 'name': 'InterpreterBytecodeArrayRegister',
- 'value': 'kInterpreterBytecodeArrayRegister.code()' },
- { 'name': 'RuntimeCallFunctionRegister',
- 'value': 'kRuntimeCallFunctionRegister.code()' },
- { 'name': 'prop_kind_Data',
- 'value': 'static_cast<int>(PropertyKind::kData)' },
- { 'name': 'prop_kind_Accessor',
- 'value': 'static_cast<int>(PropertyKind::kAccessor)' },
- { 'name': 'prop_kind_mask',
- 'value': 'PropertyDetails::KindField::kMask' },
- { 'name': 'prop_location_Descriptor',
- 'value': 'static_cast<int>(PropertyLocation::kDescriptor)' },
- { 'name': 'prop_location_Field',
- 'value': 'static_cast<int>(PropertyLocation::kField)' },
- { 'name': 'prop_location_mask',
- 'value': 'PropertyDetails::LocationField::kMask' },
- { 'name': 'prop_location_shift',
- 'value': 'PropertyDetails::LocationField::kShift' },
- { 'name': 'prop_attributes_NONE', 'value': 'NONE' },
- { 'name': 'prop_attributes_READ_ONLY', 'value': 'READ_ONLY' },
- { 'name': 'prop_attributes_DONT_ENUM', 'value': 'DONT_ENUM' },
- { 'name': 'prop_attributes_DONT_DELETE', 'value': 'DONT_DELETE' },
- { 'name': 'prop_attributes_mask',
- 'value': 'PropertyDetails::AttributesField::kMask' },
- { 'name': 'prop_attributes_shift',
- 'value': 'PropertyDetails::AttributesField::kShift' },
- { 'name': 'prop_index_mask',
- 'value': 'PropertyDetails::FieldIndexField::kMask' },
- { 'name': 'prop_index_shift',
- 'value': 'PropertyDetails::FieldIndexField::kShift' },
- { 'name': 'prop_representation_mask',
- 'value': 'PropertyDetails::RepresentationField::kMask' },
- { 'name': 'prop_representation_shift',
- 'value': 'PropertyDetails::RepresentationField::kShift' },
- { 'name': 'prop_representation_smi',
- 'value': 'Representation::Kind::kSmi' },
- { 'name': 'prop_representation_double',
- 'value': 'Representation::Kind::kDouble' },
- { 'name': 'prop_representation_heapobject',
- 'value': 'Representation::Kind::kHeapObject' },
- { 'name': 'prop_representation_tagged',
- 'value': 'Representation::Kind::kTagged' },
- { 'name': 'prop_desc_key',
- 'value': 'DescriptorArray::kEntryKeyIndex' },
- { 'name': 'prop_desc_details',
- 'value': 'DescriptorArray::kEntryDetailsIndex' },
- { 'name': 'prop_desc_value',
- 'value': 'DescriptorArray::kEntryValueIndex' },
- { 'name': 'prop_desc_size',
- 'value': 'DescriptorArray::kEntrySize' },
- { 'name': 'elements_fast_holey_elements',
- 'value': 'HOLEY_ELEMENTS' },
- { 'name': 'elements_fast_elements',
- 'value': 'PACKED_ELEMENTS' },
- { 'name': 'elements_dictionary_elements',
- 'value': 'DICTIONARY_ELEMENTS' },
- { 'name': 'bit_field2_elements_kind_mask',
- 'value': 'Map::Bits2::ElementsKindBits::kMask' },
- { 'name': 'bit_field2_elements_kind_shift',
- 'value': 'Map::Bits2::ElementsKindBits::kShift' },
- { 'name': 'bit_field3_is_dictionary_map_shift',
- 'value': 'Map::Bits3::IsDictionaryMapBit::kShift' },
- { 'name': 'bit_field3_number_of_own_descriptors_mask',
- 'value': 'Map::Bits3::NumberOfOwnDescriptorsBits::kMask' },
- { 'name': 'bit_field3_number_of_own_descriptors_shift',
- 'value': 'Map::Bits3::NumberOfOwnDescriptorsBits::kShift' },
- { 'name': 'class_Map__instance_descriptors_offset',
- 'value': 'Map::kInstanceDescriptorsOffset' },
- { 'name': 'off_fp_context_or_frame_type',
- 'value': 'CommonFrameConstants::kContextOrFrameTypeOffset'},
- { 'name': 'off_fp_context',
- 'value': 'StandardFrameConstants::kContextOffset' },
- { 'name': 'off_fp_constant_pool',
- 'value': 'StandardFrameConstants::kConstantPoolOffset' },
- { 'name': 'off_fp_function',
- 'value': 'StandardFrameConstants::kFunctionOffset' },
- { 'name': 'off_fp_args',
- 'value': 'StandardFrameConstants::kFixedFrameSizeAboveFp' },
- { 'name': 'off_fp_bytecode_array',
- 'value': 'UnoptimizedFrameConstants::kBytecodeArrayFromFp' },
- { 'name': 'off_fp_bytecode_offset',
- 'value': 'UnoptimizedFrameConstants::kBytecodeOffsetOrFeedbackVectorFromFp' },
- { 'name': 'scopeinfo_idx_nparams',
- 'value': 'ScopeInfo::kParameterCount' },
- { 'name': 'scopeinfo_idx_ncontextlocals',
- 'value': 'ScopeInfo::kContextLocalCount' },
- { 'name': 'scopeinfo_idx_first_vars',
- 'value': 'ScopeInfo::kVariablePartIndex' },
- { 'name': 'jsarray_buffer_was_detached_mask',
- 'value': 'JSArrayBuffer::WasDetachedBit::kMask' },
- { 'name': 'jsarray_buffer_was_detached_shift',
- 'value': 'JSArrayBuffer::WasDetachedBit::kShift' },
- { 'name': 'context_idx_scope_info',
- 'value': 'Context::SCOPE_INFO_INDEX' },
- { 'name': 'context_idx_prev',
- 'value': 'Context::PREVIOUS_INDEX' },
- { 'name': 'context_min_slots',
- 'value': 'Context::MIN_CONTEXT_SLOTS' },
- { 'name': 'native_context_embedder_data_offset',
- 'value': 'Internals::kNativeContextEmbedderDataOffset' },
- { 'name': 'namedictionaryshape_prefix_size',
- 'value': 'NameDictionaryShape::kPrefixSize' },
- { 'name': 'namedictionaryshape_entry_size',
- 'value': 'NameDictionaryShape::kEntrySize' },
- { 'name': 'globaldictionaryshape_entry_size',
- 'value': 'GlobalDictionaryShape::kEntrySize' },
- { 'name': 'namedictionary_prefix_start_index',
- 'value': 'NameDictionary::kPrefixStartIndex' },
- { 'name': 'numberdictionaryshape_prefix_size',
- 'value': 'NumberDictionaryShape::kPrefixSize' },
- { 'name': 'numberdictionaryshape_entry_size',
- 'value': 'NumberDictionaryShape::kEntrySize' },
- { 'name': 'simplenumberdictionaryshape_prefix_size',
- 'value': 'SimpleNumberDictionaryShape::kPrefixSize' },
- { 'name': 'simplenumberdictionaryshape_entry_size',
- 'value': 'SimpleNumberDictionaryShape::kEntrySize' },
- { 'name': 'type_JSError__JS_ERROR_TYPE', 'value': 'JS_ERROR_TYPE' },
- ];
- #
- # The following useful fields are missing accessors, so we define fake ones.
- # Please note that extra accessors should _only_ be added to expose offsets that
- # can be used to access actual V8 objects' properties. They should not be added
- # for exposing other values. For instance, enumeration values or class'
- # constants should be exposed by adding an entry in the "consts_misc" table, not
- # in this "extras_accessors" table.
- #
- extras_accessors = [
- 'JSFunction, context, Context, kContextOffset',
- 'JSFunction, shared, SharedFunctionInfo, kSharedFunctionInfoOffset',
- 'HeapObject, map, Map, kMapOffset',
- 'JSObject, elements, Object, kElementsOffset',
- 'JSObject, internal_fields, uintptr_t, kHeaderSize',
- 'FixedArray, data, uintptr_t, kHeaderSize',
- 'BytecodeArray, data, uintptr_t, kHeaderSize',
- 'JSArrayBuffer, backing_store, uintptr_t, kBackingStoreOffset',
- 'JSArrayBuffer, byte_length, size_t, kByteLengthOffset',
- 'JSArrayBufferView, byte_length, size_t, kByteLengthOffset',
- 'JSArrayBufferView, byte_offset, size_t, kByteOffsetOffset',
- 'JSDate, value, Object, kValueOffset',
- 'JSRegExp, source, Object, kSourceOffset',
- 'JSTypedArray, external_pointer, uintptr_t, kExternalPointerOffset',
- 'JSTypedArray, length, Object, kLengthOffset',
- 'Map, instance_size_in_words, char, kInstanceSizeInWordsOffset',
- 'Map, inobject_properties_start_or_constructor_function_index, char, kInobjectPropertiesStartOrConstructorFunctionIndexOffset',
- 'Map, instance_type, uint16_t, kInstanceTypeOffset',
- 'Map, bit_field, char, kBitFieldOffset',
- 'Map, bit_field2, char, kBitField2Offset',
- 'Map, bit_field3, int, kBitField3Offset',
- 'Map, prototype, Object, kPrototypeOffset',
- 'Oddball, kind_offset, int, kKindOffset',
- 'HeapNumber, value, double, kValueOffset',
- 'ExternalString, resource, Object, kResourceOffset',
- 'SeqOneByteString, chars, char, kHeaderSize',
- 'SeqTwoByteString, chars, char, kHeaderSize',
- 'UncompiledData, inferred_name, String, kInferredNameOffset',
- 'UncompiledData, start_position, int32_t, kStartPositionOffset',
- 'UncompiledData, end_position, int32_t, kEndPositionOffset',
- 'Script, source, Object, kSourceOffset',
- 'Script, name, Object, kNameOffset',
- 'Script, line_ends, Object, kLineEndsOffset',
- 'SharedFunctionInfo, raw_function_token_offset, int16_t, kFunctionTokenOffsetOffset',
- 'SharedFunctionInfo, internal_formal_parameter_count, uint16_t, kFormalParameterCountOffset',
- 'SharedFunctionInfo, flags, int, kFlagsOffset',
- 'SharedFunctionInfo, length, uint16_t, kLengthOffset',
- 'SlicedString, parent, String, kParentOffset',
- 'Code, flags, uint32_t, kFlagsOffset',
- 'Code, instruction_start, uintptr_t, kHeaderSize',
- 'Code, instruction_size, int, kInstructionSizeOffset',
- 'String, length, int32_t, kLengthOffset',
- 'DescriptorArray, header_size, uintptr_t, kHeaderSize',
- 'ConsString, first, String, kFirstOffset',
- 'ConsString, second, String, kSecondOffset',
- 'SlicedString, offset, SMI, kOffsetOffset',
- 'ThinString, actual, String, kActualOffset',
- 'Symbol, name, Object, kDescriptionOffset',
- 'FixedArrayBase, length, SMI, kLengthOffset',
- ];
- #
- # The following is a whitelist of classes we expect to find when scanning the
- # source code. This list is not exhaustive, but it's still useful to identify
- # when this script gets out of sync with the source. See load_objects().
- #
- expected_classes = [
- 'ConsString', 'FixedArray', 'HeapNumber', 'JSArray', 'JSFunction',
- 'JSObject', 'JSRegExp', 'JSPrimitiveWrapper', 'Map', 'Oddball', 'Script',
- 'SeqOneByteString', 'SharedFunctionInfo', 'ScopeInfo', 'JSPromise',
- 'DescriptorArray'
- ];
- #
- # The following structures store high-level representations of the structures
- # for which we're going to emit descriptive constants.
- #
- types = {}; # set of all type names
- typeclasses = {}; # maps type names to corresponding class names
- klasses = {}; # known classes, including parents
- fields = []; # field declarations
- header = '''
- /*
- * This file is generated by %s. Do not edit directly.
- */
- #include "src/init/v8.h"
- #include "src/codegen/register.h"
- #include "src/execution/frames.h"
- #include "src/execution/frames-inl.h" /* for architecture-specific frame constants */
- #include "src/objects/contexts.h"
- #include "src/objects/objects.h"
- #include "src/objects/data-handler.h"
- #include "src/objects/js-promise.h"
- #include "src/objects/js-regexp-string-iterator.h"
- namespace v8 {
- namespace internal {
- extern "C" {
- /* stack frame constants */
- #define FRAME_CONST(value, klass) \
- V8_EXPORT int v8dbg_frametype_##klass = StackFrame::value;
- STACK_FRAME_TYPE_LIST(FRAME_CONST)
- #undef FRAME_CONST
- ''' % sys.argv[0]
- footer = '''
- }
- }
- }
- '''
- #
- # Get the base class
- #
- def get_base_class(klass):
- if (klass == 'Object'):
- return klass;
- if (not (klass in klasses)):
- return None;
- k = klasses[klass];
- return get_base_class(k['parent']);
- #
- # Loads class hierarchy and type information from "objects.h" etc.
- #
- def load_objects():
- #
- # Construct a dictionary for the classes we're sure should be present.
- #
- checktypes = {};
- for klass in expected_classes:
- checktypes[klass] = True;
- for filename in sys.argv[2:]:
- if not filename.endswith("-inl.h"):
- load_objects_from_file(filename, checktypes)
- if (len(checktypes) > 0):
- for klass in checktypes:
- print('error: expected class \"%s\" not found' % klass);
- sys.exit(1);
- def load_objects_from_file(objfilename, checktypes):
- objfile = io.open(objfilename, 'r', encoding='utf-8');
- in_insttype = False;
- in_torque_insttype = False
- in_torque_fulldef = False
- typestr = '';
- torque_typestr = ''
- torque_fulldefstr = ''
- uncommented_file = ''
- #
- # Iterate the header file line-by-line to collect type and class
- # information. For types, we accumulate a string representing the entire
- # InstanceType enum definition and parse it later because it's easier to
- # do so without the embedded newlines.
- #
- for line in objfile:
- if (line.startswith('enum InstanceType : uint16_t {')):
- in_insttype = True;
- continue;
- if (line.startswith('#define TORQUE_ASSIGNED_INSTANCE_TYPE_LIST')):
- in_torque_insttype = True
- continue
- if (line.startswith('#define TORQUE_INSTANCE_CHECKERS_SINGLE_FULLY_DEFINED')):
- in_torque_fulldef = True
- continue
- if (in_insttype and line.startswith('};')):
- in_insttype = False;
- continue;
- if (in_torque_insttype and (not line or line.isspace())):
- in_torque_insttype = False
- continue
- if (in_torque_fulldef and (not line or line.isspace())):
- in_torque_fulldef = False
- continue
- pre = line.strip()
- line = re.sub('// .*', '', line.strip());
- if (in_insttype):
- typestr += line;
- continue;
- if (in_torque_insttype):
- torque_typestr += line
- continue
- if (in_torque_fulldef):
- torque_fulldefstr += line
- continue
- uncommented_file += '\n' + line
- for match in re.finditer(r'\nclass(?:\s+V8_EXPORT(?:_PRIVATE)?)?'
- r'\s+(\w[^:;]*)'
- r'(?:: public (\w[^{]*))?\s*{\s*',
- uncommented_file):
- klass = match.group(1).strip();
- pklass = match.group(2);
- if (pklass):
- # Check for generated Torque class.
- gen_match = re.match(
- r'TorqueGenerated\w+\s*<\s*\w+,\s*(\w+)\s*>',
- pklass)
- if (gen_match):
- pklass = gen_match.group(1)
- # Strip potential template arguments from parent
- # class.
- match = re.match(r'(\w+)(<.*>)?', pklass.strip());
- pklass = match.group(1).strip();
- klasses[klass] = { 'parent': pklass };
- #
- # Process the instance type declaration.
- #
- entries = typestr.split(',');
- for entry in entries:
- types[re.sub('\s*=.*', '', entry).lstrip()] = True;
- entries = torque_typestr.split('\\')
- for entry in entries:
- name = re.sub(r' *V\(|\).*', '', entry)
- types[name] = True
- entries = torque_fulldefstr.split('\\')
- for entry in entries:
- entry = entry.strip()
- if not entry:
- continue
- start = entry.find('(');
- end = entry.find(')', start);
- rest = entry[start + 1: end];
- args = re.split('\s*,\s*', rest);
- typename = args[0]
- typeconst = args[1]
- types[typeconst] = True
- typeclasses[typeconst] = typename
- #
- # Infer class names for each type based on a systematic transformation.
- # For example, "JS_FUNCTION_TYPE" becomes "JSFunction". We find the
- # class for each type rather than the other way around because there are
- # fewer cases where one type maps to more than one class than the other
- # way around.
- #
- for type in types:
- usetype = type
- #
- # Remove the "_TYPE" suffix and then convert to camel case,
- # except that a "JS" prefix remains uppercase (as in
- # "JS_FUNCTION_TYPE" => "JSFunction").
- #
- if (not usetype.endswith('_TYPE')):
- continue;
- usetype = usetype[0:len(usetype) - len('_TYPE')];
- parts = usetype.split('_');
- cctype = '';
- if (parts[0] == 'JS'):
- cctype = 'JS';
- start = 1;
- else:
- cctype = '';
- start = 0;
- for ii in range(start, len(parts)):
- part = parts[ii];
- cctype += part[0].upper() + part[1:].lower();
- #
- # Mapping string types is more complicated. Both types and
- # class names for Strings specify a representation (e.g., Seq,
- # Cons, External, or Sliced) and an encoding (TwoByte/OneByte),
- # In the simplest case, both of these are explicit in both
- # names, as in:
- #
- # EXTERNAL_ONE_BYTE_STRING_TYPE => ExternalOneByteString
- #
- # However, either the representation or encoding can be omitted
- # from the type name, in which case "Seq" and "TwoByte" are
- # assumed, as in:
- #
- # STRING_TYPE => SeqTwoByteString
- #
- # Additionally, sometimes the type name has more information
- # than the class, as in:
- #
- # CONS_ONE_BYTE_STRING_TYPE => ConsString
- #
- # To figure this out dynamically, we first check for a
- # representation and encoding and add them if they're not
- # present. If that doesn't yield a valid class name, then we
- # strip out the representation.
- #
- if (cctype.endswith('String')):
- if (cctype.find('Cons') == -1 and
- cctype.find('External') == -1 and
- cctype.find('Sliced') == -1):
- if (cctype.find('OneByte') != -1):
- cctype = re.sub('OneByteString$',
- 'SeqOneByteString', cctype);
- else:
- cctype = re.sub('String$',
- 'SeqString', cctype);
- if (cctype.find('OneByte') == -1):
- cctype = re.sub('String$', 'TwoByteString',
- cctype);
- if (not (cctype in klasses)):
- cctype = re.sub('OneByte', '', cctype);
- cctype = re.sub('TwoByte', '', cctype);
- #
- # Despite all that, some types have no corresponding class.
- #
- if (cctype in klasses):
- typeclasses[type] = cctype;
- if (cctype in checktypes):
- del checktypes[cctype];
- #
- # For a given macro call, pick apart the arguments and return an object
- # describing the corresponding output constant. See load_fields().
- #
- def parse_field(call):
- # Replace newlines with spaces.
- for ii in range(0, len(call)):
- if (call[ii] == '\n'):
- call[ii] == ' ';
- idx = call.find('(');
- kind = call[0:idx];
- rest = call[idx + 1: len(call) - 1];
- args = re.split('\s*,\s*', rest);
- consts = [];
- klass = args[0];
- field = args[1];
- dtype = None
- offset = None
- if kind.startswith('WEAK_ACCESSORS'):
- dtype = 'weak'
- offset = args[2];
- elif not (kind.startswith('SMI_ACCESSORS') or kind.startswith('ACCESSORS_TO_SMI')):
- dtype = args[2].replace('<', '_').replace('>', '_')
- offset = args[3];
- else:
- offset = args[2];
- dtype = 'SMI'
- assert(offset is not None and dtype is not None);
- return ({
- 'name': 'class_%s__%s__%s' % (klass, field, dtype),
- 'value': '%s::%s' % (klass, offset)
- });
- #
- # Load field offset information from objects-inl.h etc.
- #
- def load_fields():
- for filename in sys.argv[2:]:
- if filename.endswith("-inl.h"):
- load_fields_from_file(filename)
- for body in extras_accessors:
- fields.append(parse_field('ACCESSORS(%s)' % body));
- def load_fields_from_file(filename):
- inlfile = io.open(filename, 'r', encoding='utf-8');
- #
- # Each class's fields and the corresponding offsets are described in the
- # source by calls to macros like "ACCESSORS" (and friends). All we do
- # here is extract these macro invocations, taking into account that they
- # may span multiple lines and may contain nested parentheses. We also
- # call parse_field() to pick apart the invocation.
- #
- prefixes = [ 'ACCESSORS', 'ACCESSORS2', 'ACCESSORS_GCSAFE',
- 'SMI_ACCESSORS', 'ACCESSORS_TO_SMI',
- 'RELEASE_ACQUIRE_ACCESSORS', 'WEAK_ACCESSORS' ];
- prefixes += ([ prefix + "_CHECKED" for prefix in prefixes ] +
- [ prefix + "_CHECKED2" for prefix in prefixes ])
- current = '';
- opens = 0;
- for line in inlfile:
- if (opens > 0):
- # Continuation line
- for ii in range(0, len(line)):
- if (line[ii] == '('):
- opens += 1;
- elif (line[ii] == ')'):
- opens -= 1;
- if (opens == 0):
- break;
- current += line[0:ii + 1];
- continue;
- for prefix in prefixes:
- if (not line.startswith(prefix + '(')):
- continue;
- if (len(current) > 0):
- fields.append(parse_field(current));
- current = '';
- for ii in range(len(prefix), len(line)):
- if (line[ii] == '('):
- opens += 1;
- elif (line[ii] == ')'):
- opens -= 1;
- if (opens == 0):
- break;
- current += line[0:ii + 1];
- if (len(current) > 0):
- fields.append(parse_field(current));
- current = '';
- #
- # Emit a block of constants.
- #
- def emit_set(out, consts):
- lines = set() # To remove duplicates.
- # Fix up overzealous parses. This could be done inside the
- # parsers but as there are several, it's easiest to do it here.
- ws = re.compile('\s+')
- for const in consts:
- name = ws.sub('', const['name'])
- value = ws.sub('', str(const['value'])) # Can be a number.
- lines.add('V8_EXPORT int v8dbg_%s = %s;\n' % (name, value))
- for line in lines:
- out.write(line);
- out.write('\n');
- #
- # Emit the whole output file.
- #
- def emit_config():
- out = open(sys.argv[1], 'w');
- out.write(header);
- out.write('/* miscellaneous constants */\n');
- emit_set(out, consts_misc);
- out.write('/* class type information */\n');
- consts = [];
- for typename in sorted(typeclasses):
- klass = typeclasses[typename];
- consts.append({
- 'name': 'type_%s__%s' % (klass, typename),
- 'value': typename
- });
- emit_set(out, consts);
- out.write('/* class hierarchy information */\n');
- consts = [];
- for klassname in sorted(klasses):
- pklass = klasses[klassname]['parent'];
- bklass = get_base_class(klassname);
- if (bklass != 'Object'):
- continue;
- if (pklass == None):
- continue;
- consts.append({
- 'name': 'parent_%s__%s' % (klassname, pklass),
- 'value': 0
- });
- emit_set(out, consts);
- out.write('/* field information */\n');
- emit_set(out, fields);
- out.write(footer);
- if (len(sys.argv) < 4):
- print('usage: %s output.cc objects.h objects-inl.h' % sys.argv[0]);
- sys.exit(2);
- load_objects();
- load_fields();
- emit_config();
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