9b2fe70d93
Goal is to reduce native context size. R=mvstanton@chromium.org Review URL: https://codereview.chromium.org/1099573002 Cr-Commit-Position: refs/heads/master@{#27953}
1268 lines
47 KiB
JavaScript
1268 lines
47 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// -------------------------------------------------------------------
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var kMessages = {
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// Error
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constructor_is_generator: ["Class constructor may not be a generator"],
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constructor_is_accessor: ["Class constructor may not be an accessor"],
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// TypeError
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unexpected_token: ["Unexpected token ", "%0"],
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unexpected_token_number: ["Unexpected number"],
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unexpected_token_string: ["Unexpected string"],
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unexpected_token_identifier: ["Unexpected identifier"],
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unexpected_reserved: ["Unexpected reserved word"],
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unexpected_strict_reserved: ["Unexpected strict mode reserved word"],
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unexpected_eos: ["Unexpected end of input"],
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unexpected_template_string: ["Unexpected template string"],
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malformed_regexp: ["Invalid regular expression: /", "%0", "/: ", "%1"],
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malformed_regexp_flags: ["Invalid regular expression flags"],
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unterminated_regexp: ["Invalid regular expression: missing /"],
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unterminated_template: ["Unterminated template literal"],
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unterminated_template_expr: ["Missing } in template expression"],
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unterminated_arg_list: ["missing ) after argument list"],
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regexp_flags: ["Cannot supply flags when constructing one RegExp from another"],
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multiple_defaults_in_switch: ["More than one default clause in switch statement"],
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newline_after_throw: ["Illegal newline after throw"],
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label_redeclaration: ["Label '", "%0", "' has already been declared"],
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var_redeclaration: ["Identifier '", "%0", "' has already been declared"],
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duplicate_template_property: ["Object template has duplicate property '", "%0", "'"],
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no_catch_or_finally: ["Missing catch or finally after try"],
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unknown_label: ["Undefined label '", "%0", "'"],
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uncaught_exception: ["Uncaught ", "%0"],
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undefined_method: ["Object ", "%1", " has no method '", "%0", "'"],
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not_defined: ["%0", " is not defined"],
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non_method: ["'super' is referenced from non-method"],
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unsupported_super: ["Unsupported reference to 'super'"],
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non_object_property_load: ["Cannot read property '", "%0", "' of ", "%1"],
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non_object_property_store: ["Cannot set property '", "%0", "' of ", "%1"],
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illegal_invocation: ["Illegal invocation"],
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no_setter_in_callback: ["Cannot set property ", "%0", " of ", "%1", " which has only a getter"],
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flags_getter_non_object: ["RegExp.prototype.flags getter called on non-object ", "%0"],
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reduce_no_initial: ["Reduce of empty array with no initial value"],
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value_and_accessor: ["Invalid property. A property cannot both have accessors and be writable or have a value, ", "%0"],
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proto_object_or_null: ["Object prototype may only be an Object or null: ", "%0"],
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non_extensible_proto: ["%0", " is not extensible"],
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handler_non_object: ["Proxy.", "%0", " called with non-object as handler"],
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proto_non_object: ["Proxy.", "%0", " called with non-object as prototype"],
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trap_function_expected: ["Proxy.", "%0", " called with non-function for '", "%1", "' trap"],
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proxy_repeated_prop_name: ["Trap '", "%1", "' returned repeated property name '", "%2", "'"],
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invalid_weakmap_key: ["Invalid value used as weak map key"],
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invalid_weakset_value: ["Invalid value used in weak set"],
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not_date_object: ["this is not a Date object."],
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observe_non_object: ["Object.", "%0", " cannot ", "%0", " non-object"],
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observe_non_function: ["Object.", "%0", " cannot deliver to non-function"],
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observe_callback_frozen: ["Object.observe cannot deliver to a frozen function object"],
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observe_invalid_accept: ["Third argument to Object.observe must be an array of strings."],
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observe_type_non_string: ["Invalid changeRecord with non-string 'type' property"],
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observe_perform_non_string: ["Invalid non-string changeType"],
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observe_perform_non_function: ["Cannot perform non-function"],
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observe_notify_non_notifier: ["notify called on non-notifier object"],
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observe_global_proxy: ["%0", " cannot be called on the global proxy object"],
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not_typed_array: ["this is not a typed array."],
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invalid_argument: ["invalid_argument"],
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data_view_not_array_buffer: ["First argument to DataView constructor must be an ArrayBuffer"],
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constructor_not_function: ["Constructor ", "%0", " requires 'new'"],
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not_a_symbol: ["%0", " is not a symbol"],
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not_a_promise: ["%0", " is not a promise"],
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resolver_not_a_function: ["Promise resolver ", "%0", " is not a function"],
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promise_cyclic: ["Chaining cycle detected for promise ", "%0"],
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array_functions_on_frozen: ["Cannot modify frozen array elements"],
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array_functions_change_sealed: ["Cannot add/remove sealed array elements"],
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first_argument_not_regexp: ["First argument to ", "%0", " must not be a regular expression"],
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iterator_result_not_an_object: ["Iterator result ", "%0", " is not an object"],
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iterator_value_not_an_object: ["Iterator value ", "%0", " is not an entry object"],
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// RangeError
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invalid_array_length: ["Invalid array length"],
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invalid_array_buffer_length: ["Invalid array buffer length"],
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invalid_string_length: ["Invalid string length"],
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invalid_typed_array_offset: ["Start offset is too large:"],
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invalid_typed_array_length: ["Invalid typed array length"],
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invalid_typed_array_alignment: ["%0", " of ", "%1", " should be a multiple of ", "%2"],
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typed_array_set_source_too_large:
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["Source is too large"],
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typed_array_set_negative_offset:
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["Start offset is negative"],
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invalid_data_view_offset: ["Start offset is outside the bounds of the buffer"],
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invalid_data_view_length: ["Invalid data view length"],
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invalid_data_view_accessor_offset:
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["Offset is outside the bounds of the DataView"],
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invalid_time_value: ["Invalid time value"],
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invalid_count_value: ["Invalid count value"],
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invalid_code_point: ["Invalid code point ", "%0"],
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// ReferenceError
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invalid_lhs_in_assignment: ["Invalid left-hand side in assignment"],
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invalid_lhs_in_for: ["Invalid left-hand side in for-loop"],
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invalid_lhs_in_postfix_op: ["Invalid left-hand side expression in postfix operation"],
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invalid_lhs_in_prefix_op: ["Invalid left-hand side expression in prefix operation"],
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// SyntaxError
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not_isvar: ["builtin %IS_VAR: not a variable"],
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single_function_literal: ["Single function literal required"],
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invalid_regexp_flags: ["Invalid flags supplied to RegExp constructor '", "%0", "'"],
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invalid_regexp: ["Invalid RegExp pattern /", "%0", "/"],
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illegal_break: ["Illegal break statement"],
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illegal_continue: ["Illegal continue statement"],
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illegal_return: ["Illegal return statement"],
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error_loading_debugger: ["Error loading debugger"],
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circular_structure: ["Converting circular structure to JSON"],
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called_on_null_or_undefined: ["%0", " called on null or undefined"],
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array_indexof_not_defined: ["Array.getIndexOf: Argument undefined"],
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object_not_extensible: ["Can't add property ", "%0", ", object is not extensible"],
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illegal_access: ["Illegal access"],
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static_prototype: ["Classes may not have static property named prototype"],
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strict_mode_with: ["Strict mode code may not include a with statement"],
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strict_eval_arguments: ["Unexpected eval or arguments in strict mode"],
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too_many_arguments: ["Too many arguments in function call (only 65535 allowed)"],
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too_many_parameters: ["Too many parameters in function definition (only 65535 allowed)"],
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too_many_variables: ["Too many variables declared (only 4194303 allowed)"],
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strict_param_dupe: ["Strict mode function may not have duplicate parameter names"],
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strict_octal_literal: ["Octal literals are not allowed in strict mode."],
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template_octal_literal: ["Octal literals are not allowed in template strings."],
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strict_delete: ["Delete of an unqualified identifier in strict mode."],
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strict_delete_property: ["Cannot delete property '", "%0", "' of ", "%1"],
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strict_function: ["In strict mode code, functions can only be declared at top level or immediately within another function." ],
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strict_read_only_property: ["Cannot assign to read only property '", "%0", "' of ", "%1"],
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strict_cannot_assign: ["Cannot assign to read only '", "%0", "' in strict mode"],
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restricted_function_properties: ["'caller' and 'arguments' are restricted function properties and cannot be accessed in this context."],
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strict_poison_pill: ["'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them"],
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strict_caller: ["Illegal access to a strict mode caller function."],
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strong_ellision: ["In strong mode, arrays with holes are deprecated, use maps instead"],
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strong_arguments: ["In strong mode, 'arguments' is deprecated, use '...args' instead"],
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strong_undefined: ["In strong mode, binding or assigning to 'undefined' is deprecated"],
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strong_direct_eval: ["In strong mode, direct calls to eval are deprecated"],
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strong_switch_fallthrough : ["In strong mode, switch fall-through is deprecated, terminate each case with 'break', 'continue', 'return' or 'throw'"],
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strong_equal: ["In strong mode, '==' and '!=' are deprecated, use '===' and '!==' instead"],
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strong_delete: ["In strong mode, 'delete' is deprecated, use maps or sets instead"],
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strong_var: ["In strong mode, 'var' is deprecated, use 'let' or 'const' instead"],
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strong_for_in: ["In strong mode, 'for'-'in' loops are deprecated, use 'for'-'of' instead"],
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strong_empty: ["In strong mode, empty sub-statements are deprecated, make them explicit with '{}' instead"],
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strong_use_before_declaration: ["In strong mode, declaring variable '", "%0", "' before its use is required"],
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strong_unbound_global: ["In strong mode, using an undeclared global variable '", "%0", "' is not allowed"],
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strong_super_call_missing: ["In strong mode, invoking the super constructor in a subclass is required"],
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strong_super_call_duplicate: ["In strong mode, invoking the super constructor multiple times is deprecated"],
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strong_super_call_nested: ["In strong mode, invoking the super constructor nested inside another statement or expression is deprecated"],
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strong_constructor_return_value: ["In strong mode, returning a value from a constructor is deprecated"],
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strong_constructor_return_misplaced: ["In strong mode, returning from a constructor before its super constructor invocation is deprecated"],
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sloppy_lexical: ["Block-scoped declarations (let, const, function, class) not yet supported outside strict mode"],
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malformed_arrow_function_parameter_list: ["Malformed arrow function parameter list"],
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cant_prevent_ext_external_array_elements: ["Cannot prevent extension of an object with external array elements"],
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redef_external_array_element: ["Cannot redefine a property of an object with external array elements"],
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const_assign: ["Assignment to constant variable."],
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module_export_undefined: ["Export '", "%0", "' is not defined in module"],
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duplicate_export: ["Duplicate export of '", "%0", "'"],
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unexpected_super: ["'super' keyword unexpected here"],
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extends_value_not_a_function: ["Class extends value ", "%0", " is not a function or null"],
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prototype_parent_not_an_object: ["Class extends value does not have valid prototype property ", "%0"],
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duplicate_constructor: ["A class may only have one constructor"],
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super_constructor_call: ["A 'super' constructor call may only appear as the first statement of a function, and its arguments may not access 'this'. Other forms are not yet supported."],
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duplicate_proto: ["Duplicate __proto__ fields are not allowed in object literals"],
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param_after_rest: ["Rest parameter must be last formal parameter"],
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constructor_noncallable: ["Class constructors cannot be invoked without 'new'"],
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array_not_subclassable: ["Subclassing Arrays is not currently supported."],
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for_in_loop_initializer: ["for-in loop variable declaration may not have an initializer."],
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for_of_loop_initializer: ["for-of loop variable declaration may not have an initializer."],
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for_inof_loop_multi_bindings: ["Invalid left-hand side in ", "%0", " loop: Must have a single binding."]
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};
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function FormatString(format, args) {
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var result = "";
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var arg_num = 0;
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for (var i = 0; i < format.length; i++) {
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var str = format[i];
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if (str.length == 2 && %_StringCharCodeAt(str, 0) == 0x25) {
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// Two-char string starts with "%".
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var arg_num = (%_StringCharCodeAt(str, 1) - 0x30) >>> 0;
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if (arg_num < 4) {
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// str is one of %0, %1, %2 or %3.
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try {
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str = NoSideEffectToString(args[arg_num]);
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} catch (e) {
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if (%IsJSModule(args[arg_num]))
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str = "module";
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else if (IS_SPEC_OBJECT(args[arg_num]))
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str = "object";
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else
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str = "#<error>";
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}
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}
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}
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result += str;
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}
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return result;
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}
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function NoSideEffectToString(obj) {
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if (IS_STRING(obj)) return obj;
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if (IS_NUMBER(obj)) return %_NumberToString(obj);
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if (IS_BOOLEAN(obj)) return obj ? 'true' : 'false';
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if (IS_UNDEFINED(obj)) return 'undefined';
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if (IS_NULL(obj)) return 'null';
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if (IS_FUNCTION(obj)) {
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var str = %_CallFunction(obj, FunctionToString);
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if (str.length > 128) {
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str = %_SubString(str, 0, 111) + "...<omitted>..." +
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%_SubString(str, str.length - 2, str.length);
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}
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return str;
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}
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if (IS_SYMBOL(obj)) return %_CallFunction(obj, $symbolToString);
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if (IS_OBJECT(obj)
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&& %GetDataProperty(obj, "toString") === ObjectToString) {
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var constructor = %GetDataProperty(obj, "constructor");
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if (typeof constructor == "function") {
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var constructorName = constructor.name;
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if (IS_STRING(constructorName) && constructorName !== "") {
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return "#<" + constructorName + ">";
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}
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}
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}
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if (CanBeSafelyTreatedAsAnErrorObject(obj)) {
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return %_CallFunction(obj, ErrorToString);
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}
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return %_CallFunction(obj, NoSideEffectsObjectToString);
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}
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// To determine whether we can safely stringify an object using ErrorToString
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// without the risk of side-effects, we need to check whether the object is
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// either an instance of a native error type (via '%_ClassOf'), or has $Error
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// in its prototype chain and hasn't overwritten 'toString' with something
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// strange and unusual.
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function CanBeSafelyTreatedAsAnErrorObject(obj) {
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switch (%_ClassOf(obj)) {
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case 'Error':
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case 'EvalError':
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case 'RangeError':
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case 'ReferenceError':
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case 'SyntaxError':
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case 'TypeError':
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case 'URIError':
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return true;
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}
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var objToString = %GetDataProperty(obj, "toString");
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return obj instanceof $Error && objToString === ErrorToString;
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}
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// When formatting internally created error messages, do not
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// invoke overwritten error toString methods but explicitly use
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// the error to string method. This is to avoid leaking error
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// objects between script tags in a browser setting.
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function ToStringCheckErrorObject(obj) {
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if (CanBeSafelyTreatedAsAnErrorObject(obj)) {
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return %_CallFunction(obj, ErrorToString);
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} else {
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return ToString(obj);
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}
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}
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function ToDetailString(obj) {
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if (obj != null && IS_OBJECT(obj) && obj.toString === ObjectToString) {
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var constructor = obj.constructor;
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if (typeof constructor == "function") {
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var constructorName = constructor.name;
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if (IS_STRING(constructorName) && constructorName !== "") {
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return "#<" + constructorName + ">";
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}
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}
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}
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return ToStringCheckErrorObject(obj);
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}
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function MakeGenericError(constructor, type, arg0, arg1, arg2) {
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if (IS_UNDEFINED(arg0) && IS_STRING(type)) arg0 = [];
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return new constructor(FormatMessage(type, arg0, arg1, arg2));
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}
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/**
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* Set up the Script function and constructor.
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*/
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%FunctionSetInstanceClassName(Script, 'Script');
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%AddNamedProperty(Script.prototype, 'constructor', Script,
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DONT_ENUM | DONT_DELETE | READ_ONLY);
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%SetCode(Script, function(x) {
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// Script objects can only be created by the VM.
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throw new $Error("Not supported");
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});
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// Helper functions; called from the runtime system.
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function FormatMessage(type, arg0, arg1, arg2) {
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if (IS_NUMBER(type)) {
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var arg0 = NoSideEffectToString(arg0);
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var arg1 = NoSideEffectToString(arg1);
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var arg2 = NoSideEffectToString(arg2);
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try {
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return %FormatMessageString(type, arg0, arg1, arg2);
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} catch (e) {
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return "";
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}
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}
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// TODO(yangguo): remove this code path once we migrated all messages.
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var format = kMessages[type];
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if (!format) return "<unknown message " + type + ">";
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return FormatString(format, arg0);
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}
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function GetLineNumber(message) {
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var start_position = %MessageGetStartPosition(message);
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if (start_position == -1) return kNoLineNumberInfo;
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var script = %MessageGetScript(message);
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var location = script.locationFromPosition(start_position, true);
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if (location == null) return kNoLineNumberInfo;
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return location.line + 1;
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}
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// Returns the source code line containing the given source
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// position, or the empty string if the position is invalid.
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function GetSourceLine(message) {
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var script = %MessageGetScript(message);
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var start_position = %MessageGetStartPosition(message);
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var location = script.locationFromPosition(start_position, true);
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if (location == null) return "";
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return location.sourceText();
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}
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function MakeError(type, arg0, arg1, arg2) {
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return MakeGenericError($Error, type, arg0, arg1, arg2);
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}
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function MakeTypeError(type, arg0, arg1, arg2) {
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return MakeGenericError($TypeError, type, arg0, arg1, arg2);
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}
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function MakeRangeError(type, arg0, arg1, arg2) {
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return MakeGenericError($RangeError, type, arg0, arg1, arg2);
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}
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function MakeSyntaxError(type, arg0, arg1, arg2) {
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return MakeGenericError($SyntaxError, type, arg0, arg1, arg2);
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}
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function MakeReferenceError(type, arg0, arg1, arg2) {
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return MakeGenericError($ReferenceError, type, arg0, arg1, arg2);
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}
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function MakeEvalError(type, arg0, arg1, arg2) {
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return MakeGenericError($EvalError, type, arg0, arg1, arg2);
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}
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// The embedded versions are called from unoptimized code, with embedded
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// arguments. Those arguments cannot be arrays, which are context-dependent.
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function MakeTypeErrorEmbedded(type, arg) {
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return MakeGenericError($TypeError, type, [arg]);
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}
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function MakeSyntaxErrorEmbedded(type, arg) {
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return MakeGenericError($SyntaxError, type, [arg]);
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}
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function MakeReferenceErrorEmbedded(type, arg) {
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return MakeGenericError($ReferenceError, type, [arg]);
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}
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/**
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* Find a line number given a specific source position.
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* @param {number} position The source position.
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* @return {number} 0 if input too small, -1 if input too large,
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else the line number.
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*/
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function ScriptLineFromPosition(position) {
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var lower = 0;
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var upper = this.lineCount() - 1;
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var line_ends = this.line_ends;
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// We'll never find invalid positions so bail right away.
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if (position > line_ends[upper]) {
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return -1;
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}
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// This means we don't have to safe-guard indexing line_ends[i - 1].
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if (position <= line_ends[0]) {
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return 0;
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}
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// Binary search to find line # from position range.
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while (upper >= 1) {
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var i = (lower + upper) >> 1;
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if (position > line_ends[i]) {
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lower = i + 1;
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} else if (position <= line_ends[i - 1]) {
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upper = i - 1;
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} else {
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return i;
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}
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}
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return -1;
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}
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|
|
|
/**
|
|
* Get information on a specific source position.
|
|
* @param {number} position The source position
|
|
* @param {boolean} include_resource_offset Set to true to have the resource
|
|
* offset added to the location
|
|
* @return {SourceLocation}
|
|
* If line is negative or not in the source null is returned.
|
|
*/
|
|
function ScriptLocationFromPosition(position,
|
|
include_resource_offset) {
|
|
var line = this.lineFromPosition(position);
|
|
if (line == -1) return null;
|
|
|
|
// Determine start, end and column.
|
|
var line_ends = this.line_ends;
|
|
var start = line == 0 ? 0 : line_ends[line - 1] + 1;
|
|
var end = line_ends[line];
|
|
if (end > 0 && %_CallFunction(this.source, end - 1, $stringCharAt) == '\r') {
|
|
end--;
|
|
}
|
|
var column = position - start;
|
|
|
|
// Adjust according to the offset within the resource.
|
|
if (include_resource_offset) {
|
|
line += this.line_offset;
|
|
if (line == this.line_offset) {
|
|
column += this.column_offset;
|
|
}
|
|
}
|
|
|
|
return new SourceLocation(this, position, line, column, start, end);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get information on a specific source line and column possibly offset by a
|
|
* fixed source position. This function is used to find a source position from
|
|
* a line and column position. The fixed source position offset is typically
|
|
* used to find a source position in a function based on a line and column in
|
|
* the source for the function alone. The offset passed will then be the
|
|
* start position of the source for the function within the full script source.
|
|
* @param {number} opt_line The line within the source. Default value is 0
|
|
* @param {number} opt_column The column in within the line. Default value is 0
|
|
* @param {number} opt_offset_position The offset from the begining of the
|
|
* source from where the line and column calculation starts.
|
|
* Default value is 0
|
|
* @return {SourceLocation}
|
|
* If line is negative or not in the source null is returned.
|
|
*/
|
|
function ScriptLocationFromLine(opt_line, opt_column, opt_offset_position) {
|
|
// Default is the first line in the script. Lines in the script is relative
|
|
// to the offset within the resource.
|
|
var line = 0;
|
|
if (!IS_UNDEFINED(opt_line)) {
|
|
line = opt_line - this.line_offset;
|
|
}
|
|
|
|
// Default is first column. If on the first line add the offset within the
|
|
// resource.
|
|
var column = opt_column || 0;
|
|
if (line == 0) {
|
|
column -= this.column_offset;
|
|
}
|
|
|
|
var offset_position = opt_offset_position || 0;
|
|
if (line < 0 || column < 0 || offset_position < 0) return null;
|
|
if (line == 0) {
|
|
return this.locationFromPosition(offset_position + column, false);
|
|
} else {
|
|
// Find the line where the offset position is located.
|
|
var offset_line = this.lineFromPosition(offset_position);
|
|
|
|
if (offset_line == -1 || offset_line + line >= this.lineCount()) {
|
|
return null;
|
|
}
|
|
|
|
return this.locationFromPosition(
|
|
this.line_ends[offset_line + line - 1] + 1 + column); // line > 0 here.
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get a slice of source code from the script. The boundaries for the slice is
|
|
* specified in lines.
|
|
* @param {number} opt_from_line The first line (zero bound) in the slice.
|
|
* Default is 0
|
|
* @param {number} opt_to_column The last line (zero bound) in the slice (non
|
|
* inclusive). Default is the number of lines in the script
|
|
* @return {SourceSlice} The source slice or null of the parameters where
|
|
* invalid
|
|
*/
|
|
function ScriptSourceSlice(opt_from_line, opt_to_line) {
|
|
var from_line = IS_UNDEFINED(opt_from_line) ? this.line_offset
|
|
: opt_from_line;
|
|
var to_line = IS_UNDEFINED(opt_to_line) ? this.line_offset + this.lineCount()
|
|
: opt_to_line;
|
|
|
|
// Adjust according to the offset within the resource.
|
|
from_line -= this.line_offset;
|
|
to_line -= this.line_offset;
|
|
if (from_line < 0) from_line = 0;
|
|
if (to_line > this.lineCount()) to_line = this.lineCount();
|
|
|
|
// Check parameters.
|
|
if (from_line >= this.lineCount() ||
|
|
to_line < 0 ||
|
|
from_line > to_line) {
|
|
return null;
|
|
}
|
|
|
|
var line_ends = this.line_ends;
|
|
var from_position = from_line == 0 ? 0 : line_ends[from_line - 1] + 1;
|
|
var to_position = to_line == 0 ? 0 : line_ends[to_line - 1] + 1;
|
|
|
|
// Return a source slice with line numbers re-adjusted to the resource.
|
|
return new SourceSlice(this,
|
|
from_line + this.line_offset,
|
|
to_line + this.line_offset,
|
|
from_position, to_position);
|
|
}
|
|
|
|
|
|
function ScriptSourceLine(opt_line) {
|
|
// Default is the first line in the script. Lines in the script are relative
|
|
// to the offset within the resource.
|
|
var line = 0;
|
|
if (!IS_UNDEFINED(opt_line)) {
|
|
line = opt_line - this.line_offset;
|
|
}
|
|
|
|
// Check parameter.
|
|
if (line < 0 || this.lineCount() <= line) {
|
|
return null;
|
|
}
|
|
|
|
// Return the source line.
|
|
var line_ends = this.line_ends;
|
|
var start = line == 0 ? 0 : line_ends[line - 1] + 1;
|
|
var end = line_ends[line];
|
|
return %_CallFunction(this.source, start, end, $stringSubstring);
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the number of source lines.
|
|
* @return {number}
|
|
* Number of source lines.
|
|
*/
|
|
function ScriptLineCount() {
|
|
// Return number of source lines.
|
|
return this.line_ends.length;
|
|
}
|
|
|
|
|
|
/**
|
|
* If sourceURL comment is available returns sourceURL comment contents.
|
|
* Otherwise, script name is returned. See
|
|
* http://fbug.googlecode.com/svn/branches/firebug1.1/docs/ReleaseNotes_1.1.txt
|
|
* and Source Map Revision 3 proposal for details on using //# sourceURL and
|
|
* deprecated //@ sourceURL comment to identify scripts that don't have name.
|
|
*
|
|
* @return {?string} script name if present, value for //# sourceURL or
|
|
* deprecated //@ sourceURL comment otherwise.
|
|
*/
|
|
function ScriptNameOrSourceURL() {
|
|
if (this.source_url) return this.source_url;
|
|
return this.name;
|
|
}
|
|
|
|
|
|
SetUpLockedPrototype(Script, [
|
|
"source",
|
|
"name",
|
|
"source_url",
|
|
"source_mapping_url",
|
|
"line_ends",
|
|
"line_offset",
|
|
"column_offset"
|
|
], [
|
|
"lineFromPosition", ScriptLineFromPosition,
|
|
"locationFromPosition", ScriptLocationFromPosition,
|
|
"locationFromLine", ScriptLocationFromLine,
|
|
"sourceSlice", ScriptSourceSlice,
|
|
"sourceLine", ScriptSourceLine,
|
|
"lineCount", ScriptLineCount,
|
|
"nameOrSourceURL", ScriptNameOrSourceURL
|
|
]
|
|
);
|
|
|
|
|
|
/**
|
|
* Class for source location. A source location is a position within some
|
|
* source with the following properties:
|
|
* script : script object for the source
|
|
* line : source line number
|
|
* column : source column within the line
|
|
* position : position within the source
|
|
* start : position of start of source context (inclusive)
|
|
* end : position of end of source context (not inclusive)
|
|
* Source text for the source context is the character interval
|
|
* [start, end[. In most cases end will point to a newline character.
|
|
* It might point just past the final position of the source if the last
|
|
* source line does not end with a newline character.
|
|
* @param {Script} script The Script object for which this is a location
|
|
* @param {number} position Source position for the location
|
|
* @param {number} line The line number for the location
|
|
* @param {number} column The column within the line for the location
|
|
* @param {number} start Source position for start of source context
|
|
* @param {number} end Source position for end of source context
|
|
* @constructor
|
|
*/
|
|
function SourceLocation(script, position, line, column, start, end) {
|
|
this.script = script;
|
|
this.position = position;
|
|
this.line = line;
|
|
this.column = column;
|
|
this.start = start;
|
|
this.end = end;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the source text for a SourceLocation
|
|
* @return {String}
|
|
* Source text for this location.
|
|
*/
|
|
function SourceLocationSourceText() {
|
|
return %_CallFunction(this.script.source,
|
|
this.start,
|
|
this.end,
|
|
$stringSubstring);
|
|
}
|
|
|
|
|
|
SetUpLockedPrototype(SourceLocation,
|
|
["script", "position", "line", "column", "start", "end"],
|
|
["sourceText", SourceLocationSourceText]
|
|
);
|
|
|
|
|
|
/**
|
|
* Class for a source slice. A source slice is a part of a script source with
|
|
* the following properties:
|
|
* script : script object for the source
|
|
* from_line : line number for the first line in the slice
|
|
* to_line : source line number for the last line in the slice
|
|
* from_position : position of the first character in the slice
|
|
* to_position : position of the last character in the slice
|
|
* The to_line and to_position are not included in the slice, that is the lines
|
|
* in the slice are [from_line, to_line[. Likewise the characters in the slice
|
|
* are [from_position, to_position[.
|
|
* @param {Script} script The Script object for the source slice
|
|
* @param {number} from_line
|
|
* @param {number} to_line
|
|
* @param {number} from_position
|
|
* @param {number} to_position
|
|
* @constructor
|
|
*/
|
|
function SourceSlice(script, from_line, to_line, from_position, to_position) {
|
|
this.script = script;
|
|
this.from_line = from_line;
|
|
this.to_line = to_line;
|
|
this.from_position = from_position;
|
|
this.to_position = to_position;
|
|
}
|
|
|
|
/**
|
|
* Get the source text for a SourceSlice
|
|
* @return {String} Source text for this slice. The last line will include
|
|
* the line terminating characters (if any)
|
|
*/
|
|
function SourceSliceSourceText() {
|
|
return %_CallFunction(this.script.source,
|
|
this.from_position,
|
|
this.to_position,
|
|
$stringSubstring);
|
|
}
|
|
|
|
SetUpLockedPrototype(SourceSlice,
|
|
["script", "from_line", "to_line", "from_position", "to_position"],
|
|
["sourceText", SourceSliceSourceText]
|
|
);
|
|
|
|
|
|
// Returns the offset of the given position within the containing
|
|
// line.
|
|
function GetPositionInLine(message) {
|
|
var script = %MessageGetScript(message);
|
|
var start_position = %MessageGetStartPosition(message);
|
|
var location = script.locationFromPosition(start_position, false);
|
|
if (location == null) return -1;
|
|
return start_position - location.start;
|
|
}
|
|
|
|
|
|
function GetStackTraceLine(recv, fun, pos, isGlobal) {
|
|
return new CallSite(recv, fun, pos, false).toString();
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Error implementation
|
|
|
|
var CallSiteReceiverKey = NEW_PRIVATE_OWN("CallSite#receiver");
|
|
var CallSiteFunctionKey = NEW_PRIVATE_OWN("CallSite#function");
|
|
var CallSitePositionKey = NEW_PRIVATE_OWN("CallSite#position");
|
|
var CallSiteStrictModeKey = NEW_PRIVATE_OWN("CallSite#strict_mode");
|
|
|
|
function CallSite(receiver, fun, pos, strict_mode) {
|
|
SET_PRIVATE(this, CallSiteReceiverKey, receiver);
|
|
SET_PRIVATE(this, CallSiteFunctionKey, fun);
|
|
SET_PRIVATE(this, CallSitePositionKey, pos);
|
|
SET_PRIVATE(this, CallSiteStrictModeKey, strict_mode);
|
|
}
|
|
|
|
function CallSiteGetThis() {
|
|
return GET_PRIVATE(this, CallSiteStrictModeKey)
|
|
? UNDEFINED : GET_PRIVATE(this, CallSiteReceiverKey);
|
|
}
|
|
|
|
function CallSiteGetTypeName() {
|
|
return GetTypeName(GET_PRIVATE(this, CallSiteReceiverKey), false);
|
|
}
|
|
|
|
function CallSiteIsToplevel() {
|
|
if (GET_PRIVATE(this, CallSiteReceiverKey) == null) {
|
|
return true;
|
|
}
|
|
return IS_GLOBAL(GET_PRIVATE(this, CallSiteReceiverKey));
|
|
}
|
|
|
|
function CallSiteIsEval() {
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
return script && script.compilation_type == COMPILATION_TYPE_EVAL;
|
|
}
|
|
|
|
function CallSiteGetEvalOrigin() {
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
return FormatEvalOrigin(script);
|
|
}
|
|
|
|
function CallSiteGetScriptNameOrSourceURL() {
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
return script ? script.nameOrSourceURL() : null;
|
|
}
|
|
|
|
function CallSiteGetFunction() {
|
|
return GET_PRIVATE(this, CallSiteStrictModeKey)
|
|
? UNDEFINED : GET_PRIVATE(this, CallSiteFunctionKey);
|
|
}
|
|
|
|
function CallSiteGetFunctionName() {
|
|
// See if the function knows its own name
|
|
var fun = GET_PRIVATE(this, CallSiteFunctionKey);
|
|
var name = %FunctionGetDebugName(fun);
|
|
if (name) {
|
|
return name;
|
|
}
|
|
// Maybe this is an evaluation?
|
|
var script = %FunctionGetScript(fun);
|
|
if (script && script.compilation_type == COMPILATION_TYPE_EVAL) {
|
|
return "eval";
|
|
}
|
|
return null;
|
|
}
|
|
|
|
function CallSiteGetMethodName() {
|
|
// See if we can find a unique property on the receiver that holds
|
|
// this function.
|
|
var receiver = GET_PRIVATE(this, CallSiteReceiverKey);
|
|
var fun = GET_PRIVATE(this, CallSiteFunctionKey);
|
|
var ownName = fun.name;
|
|
if (ownName && receiver &&
|
|
(%_CallFunction(receiver, ownName, ObjectLookupGetter) === fun ||
|
|
%_CallFunction(receiver, ownName, ObjectLookupSetter) === fun ||
|
|
(IS_OBJECT(receiver) && %GetDataProperty(receiver, ownName) === fun))) {
|
|
// To handle DontEnum properties we guess that the method has
|
|
// the same name as the function.
|
|
return ownName;
|
|
}
|
|
var name = null;
|
|
for (var prop in receiver) {
|
|
if (%_CallFunction(receiver, prop, ObjectLookupGetter) === fun ||
|
|
%_CallFunction(receiver, prop, ObjectLookupSetter) === fun ||
|
|
(IS_OBJECT(receiver) && %GetDataProperty(receiver, prop) === fun)) {
|
|
// If we find more than one match bail out to avoid confusion.
|
|
if (name) {
|
|
return null;
|
|
}
|
|
name = prop;
|
|
}
|
|
}
|
|
if (name) {
|
|
return name;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
function CallSiteGetFileName() {
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
return script ? script.name : null;
|
|
}
|
|
|
|
function CallSiteGetLineNumber() {
|
|
if (GET_PRIVATE(this, CallSitePositionKey) == -1) {
|
|
return null;
|
|
}
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
var location = null;
|
|
if (script) {
|
|
location = script.locationFromPosition(
|
|
GET_PRIVATE(this, CallSitePositionKey), true);
|
|
}
|
|
return location ? location.line + 1 : null;
|
|
}
|
|
|
|
function CallSiteGetColumnNumber() {
|
|
if (GET_PRIVATE(this, CallSitePositionKey) == -1) {
|
|
return null;
|
|
}
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
var location = null;
|
|
if (script) {
|
|
location = script.locationFromPosition(
|
|
GET_PRIVATE(this, CallSitePositionKey), true);
|
|
}
|
|
return location ? location.column + 1: null;
|
|
}
|
|
|
|
function CallSiteIsNative() {
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
return script ? (script.type == TYPE_NATIVE) : false;
|
|
}
|
|
|
|
function CallSiteGetPosition() {
|
|
return GET_PRIVATE(this, CallSitePositionKey);
|
|
}
|
|
|
|
function CallSiteIsConstructor() {
|
|
var receiver = GET_PRIVATE(this, CallSiteReceiverKey);
|
|
var constructor = (receiver != null && IS_OBJECT(receiver))
|
|
? %GetDataProperty(receiver, "constructor") : null;
|
|
if (!constructor) return false;
|
|
return GET_PRIVATE(this, CallSiteFunctionKey) === constructor;
|
|
}
|
|
|
|
function CallSiteToString() {
|
|
var fileName;
|
|
var fileLocation = "";
|
|
if (this.isNative()) {
|
|
fileLocation = "native";
|
|
} else {
|
|
fileName = this.getScriptNameOrSourceURL();
|
|
if (!fileName && this.isEval()) {
|
|
fileLocation = this.getEvalOrigin();
|
|
fileLocation += ", "; // Expecting source position to follow.
|
|
}
|
|
|
|
if (fileName) {
|
|
fileLocation += fileName;
|
|
} else {
|
|
// Source code does not originate from a file and is not native, but we
|
|
// can still get the source position inside the source string, e.g. in
|
|
// an eval string.
|
|
fileLocation += "<anonymous>";
|
|
}
|
|
var lineNumber = this.getLineNumber();
|
|
if (lineNumber != null) {
|
|
fileLocation += ":" + lineNumber;
|
|
var columnNumber = this.getColumnNumber();
|
|
if (columnNumber) {
|
|
fileLocation += ":" + columnNumber;
|
|
}
|
|
}
|
|
}
|
|
|
|
var line = "";
|
|
var functionName = this.getFunctionName();
|
|
var addSuffix = true;
|
|
var isConstructor = this.isConstructor();
|
|
var isMethodCall = !(this.isToplevel() || isConstructor);
|
|
if (isMethodCall) {
|
|
var typeName = GetTypeName(GET_PRIVATE(this, CallSiteReceiverKey), true);
|
|
var methodName = this.getMethodName();
|
|
if (functionName) {
|
|
if (typeName &&
|
|
%_CallFunction(functionName, typeName, $stringIndexOf) != 0) {
|
|
line += typeName + ".";
|
|
}
|
|
line += functionName;
|
|
if (methodName &&
|
|
(%_CallFunction(functionName, "." + methodName, $stringIndexOf) !=
|
|
functionName.length - methodName.length - 1)) {
|
|
line += " [as " + methodName + "]";
|
|
}
|
|
} else {
|
|
line += typeName + "." + (methodName || "<anonymous>");
|
|
}
|
|
} else if (isConstructor) {
|
|
line += "new " + (functionName || "<anonymous>");
|
|
} else if (functionName) {
|
|
line += functionName;
|
|
} else {
|
|
line += fileLocation;
|
|
addSuffix = false;
|
|
}
|
|
if (addSuffix) {
|
|
line += " (" + fileLocation + ")";
|
|
}
|
|
return line;
|
|
}
|
|
|
|
SetUpLockedPrototype(CallSite, ["receiver", "fun", "pos"], [
|
|
"getThis", CallSiteGetThis,
|
|
"getTypeName", CallSiteGetTypeName,
|
|
"isToplevel", CallSiteIsToplevel,
|
|
"isEval", CallSiteIsEval,
|
|
"getEvalOrigin", CallSiteGetEvalOrigin,
|
|
"getScriptNameOrSourceURL", CallSiteGetScriptNameOrSourceURL,
|
|
"getFunction", CallSiteGetFunction,
|
|
"getFunctionName", CallSiteGetFunctionName,
|
|
"getMethodName", CallSiteGetMethodName,
|
|
"getFileName", CallSiteGetFileName,
|
|
"getLineNumber", CallSiteGetLineNumber,
|
|
"getColumnNumber", CallSiteGetColumnNumber,
|
|
"isNative", CallSiteIsNative,
|
|
"getPosition", CallSiteGetPosition,
|
|
"isConstructor", CallSiteIsConstructor,
|
|
"toString", CallSiteToString
|
|
]);
|
|
|
|
|
|
function FormatEvalOrigin(script) {
|
|
var sourceURL = script.nameOrSourceURL();
|
|
if (sourceURL) {
|
|
return sourceURL;
|
|
}
|
|
|
|
var eval_origin = "eval at ";
|
|
if (script.eval_from_function_name) {
|
|
eval_origin += script.eval_from_function_name;
|
|
} else {
|
|
eval_origin += "<anonymous>";
|
|
}
|
|
|
|
var eval_from_script = script.eval_from_script;
|
|
if (eval_from_script) {
|
|
if (eval_from_script.compilation_type == COMPILATION_TYPE_EVAL) {
|
|
// eval script originated from another eval.
|
|
eval_origin += " (" + FormatEvalOrigin(eval_from_script) + ")";
|
|
} else {
|
|
// eval script originated from "real" source.
|
|
if (eval_from_script.name) {
|
|
eval_origin += " (" + eval_from_script.name;
|
|
var location = eval_from_script.locationFromPosition(
|
|
script.eval_from_script_position, true);
|
|
if (location) {
|
|
eval_origin += ":" + (location.line + 1);
|
|
eval_origin += ":" + (location.column + 1);
|
|
}
|
|
eval_origin += ")";
|
|
} else {
|
|
eval_origin += " (unknown source)";
|
|
}
|
|
}
|
|
}
|
|
|
|
return eval_origin;
|
|
}
|
|
|
|
|
|
function FormatErrorString(error) {
|
|
try {
|
|
return %_CallFunction(error, ErrorToString);
|
|
} catch (e) {
|
|
try {
|
|
return "<error: " + e + ">";
|
|
} catch (ee) {
|
|
return "<error>";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
function GetStackFrames(raw_stack) {
|
|
var frames = new InternalArray();
|
|
var sloppy_frames = raw_stack[0];
|
|
for (var i = 1; i < raw_stack.length; i += 4) {
|
|
var recv = raw_stack[i];
|
|
var fun = raw_stack[i + 1];
|
|
var code = raw_stack[i + 2];
|
|
var pc = raw_stack[i + 3];
|
|
var pos = %FunctionGetPositionForOffset(code, pc);
|
|
sloppy_frames--;
|
|
frames.push(new CallSite(recv, fun, pos, (sloppy_frames < 0)));
|
|
}
|
|
return frames;
|
|
}
|
|
|
|
|
|
// Flag to prevent recursive call of Error.prepareStackTrace.
|
|
var formatting_custom_stack_trace = false;
|
|
|
|
|
|
function FormatStackTrace(obj, raw_stack) {
|
|
var frames = GetStackFrames(raw_stack);
|
|
if (IS_FUNCTION($Error.prepareStackTrace) && !formatting_custom_stack_trace) {
|
|
var array = [];
|
|
%MoveArrayContents(frames, array);
|
|
formatting_custom_stack_trace = true;
|
|
var stack_trace = UNDEFINED;
|
|
try {
|
|
stack_trace = $Error.prepareStackTrace(obj, array);
|
|
} catch (e) {
|
|
throw e; // The custom formatting function threw. Rethrow.
|
|
} finally {
|
|
formatting_custom_stack_trace = false;
|
|
}
|
|
return stack_trace;
|
|
}
|
|
|
|
var lines = new InternalArray();
|
|
lines.push(FormatErrorString(obj));
|
|
for (var i = 0; i < frames.length; i++) {
|
|
var frame = frames[i];
|
|
var line;
|
|
try {
|
|
line = frame.toString();
|
|
} catch (e) {
|
|
try {
|
|
line = "<error: " + e + ">";
|
|
} catch (ee) {
|
|
// Any code that reaches this point is seriously nasty!
|
|
line = "<error>";
|
|
}
|
|
}
|
|
lines.push(" at " + line);
|
|
}
|
|
return %_CallFunction(lines, "\n", $arrayJoin);
|
|
}
|
|
|
|
|
|
function GetTypeName(receiver, requireConstructor) {
|
|
var constructor = receiver.constructor;
|
|
if (!constructor) {
|
|
return requireConstructor ? null :
|
|
%_CallFunction(receiver, NoSideEffectsObjectToString);
|
|
}
|
|
var constructorName = constructor.name;
|
|
if (!constructorName) {
|
|
return requireConstructor ? null :
|
|
%_CallFunction(receiver, NoSideEffectsObjectToString);
|
|
}
|
|
return constructorName;
|
|
}
|
|
|
|
|
|
var stack_trace_symbol; // Set during bootstrapping.
|
|
var formatted_stack_trace_symbol = NEW_PRIVATE_OWN("formatted stack trace");
|
|
|
|
|
|
// Format the stack trace if not yet done, and return it.
|
|
// Cache the formatted stack trace on the holder.
|
|
var StackTraceGetter = function() {
|
|
var formatted_stack_trace = UNDEFINED;
|
|
var holder = this;
|
|
while (holder) {
|
|
var formatted_stack_trace =
|
|
GET_PRIVATE(holder, formatted_stack_trace_symbol);
|
|
if (IS_UNDEFINED(formatted_stack_trace)) {
|
|
// No formatted stack trace available.
|
|
var stack_trace = GET_PRIVATE(holder, stack_trace_symbol);
|
|
if (IS_UNDEFINED(stack_trace)) {
|
|
// Neither formatted nor structured stack trace available.
|
|
// Look further up the prototype chain.
|
|
holder = %_GetPrototype(holder);
|
|
continue;
|
|
}
|
|
formatted_stack_trace = FormatStackTrace(holder, stack_trace);
|
|
SET_PRIVATE(holder, stack_trace_symbol, UNDEFINED);
|
|
SET_PRIVATE(holder, formatted_stack_trace_symbol, formatted_stack_trace);
|
|
}
|
|
return formatted_stack_trace;
|
|
}
|
|
return UNDEFINED;
|
|
};
|
|
|
|
|
|
// If the receiver equals the holder, set the formatted stack trace that the
|
|
// getter returns.
|
|
var StackTraceSetter = function(v) {
|
|
if (HAS_PRIVATE(this, stack_trace_symbol)) {
|
|
SET_PRIVATE(this, stack_trace_symbol, UNDEFINED);
|
|
SET_PRIVATE(this, formatted_stack_trace_symbol, v);
|
|
}
|
|
};
|
|
|
|
|
|
// Use a dummy function since we do not actually want to capture a stack trace
|
|
// when constructing the initial Error prototytpes.
|
|
var captureStackTrace = function captureStackTrace(obj, cons_opt) {
|
|
// Define accessors first, as this may fail and throw.
|
|
ObjectDefineProperty(obj, 'stack', { get: StackTraceGetter,
|
|
set: StackTraceSetter,
|
|
configurable: true });
|
|
%CollectStackTrace(obj, cons_opt ? cons_opt : captureStackTrace);
|
|
}
|
|
|
|
|
|
function SetUpError() {
|
|
// Define special error type constructors.
|
|
|
|
var DefineError = function(f) {
|
|
// Store the error function in both the global object
|
|
// and the runtime object. The function is fetched
|
|
// from the runtime object when throwing errors from
|
|
// within the runtime system to avoid strange side
|
|
// effects when overwriting the error functions from
|
|
// user code.
|
|
var name = f.name;
|
|
%AddNamedProperty(global, name, f, DONT_ENUM);
|
|
%AddNamedProperty(builtins, '$' + name, f,
|
|
DONT_ENUM | DONT_DELETE | READ_ONLY);
|
|
// Configure the error function.
|
|
if (name == 'Error') {
|
|
// The prototype of the Error object must itself be an error.
|
|
// However, it can't be an instance of the Error object because
|
|
// it hasn't been properly configured yet. Instead we create a
|
|
// special not-a-true-error-but-close-enough object.
|
|
var ErrorPrototype = function() {};
|
|
%FunctionSetPrototype(ErrorPrototype, $Object.prototype);
|
|
%FunctionSetInstanceClassName(ErrorPrototype, 'Error');
|
|
%FunctionSetPrototype(f, new ErrorPrototype());
|
|
} else {
|
|
%FunctionSetPrototype(f, new $Error());
|
|
%InternalSetPrototype(f, $Error);
|
|
}
|
|
%FunctionSetInstanceClassName(f, 'Error');
|
|
%AddNamedProperty(f.prototype, 'constructor', f, DONT_ENUM);
|
|
%AddNamedProperty(f.prototype, 'name', name, DONT_ENUM);
|
|
%SetCode(f, function(m) {
|
|
if (%_IsConstructCall()) {
|
|
try { captureStackTrace(this, f); } catch (e) { }
|
|
// Define all the expected properties directly on the error
|
|
// object. This avoids going through getters and setters defined
|
|
// on prototype objects.
|
|
if (!IS_UNDEFINED(m)) {
|
|
%AddNamedProperty(this, 'message', ToString(m), DONT_ENUM);
|
|
}
|
|
} else {
|
|
return new f(m);
|
|
}
|
|
});
|
|
%SetNativeFlag(f);
|
|
};
|
|
|
|
DefineError(function Error() { });
|
|
DefineError(function TypeError() { });
|
|
DefineError(function RangeError() { });
|
|
DefineError(function SyntaxError() { });
|
|
DefineError(function ReferenceError() { });
|
|
DefineError(function EvalError() { });
|
|
DefineError(function URIError() { });
|
|
}
|
|
|
|
SetUpError();
|
|
|
|
$Error.captureStackTrace = captureStackTrace;
|
|
|
|
%AddNamedProperty($Error.prototype, 'message', '', DONT_ENUM);
|
|
|
|
// Global list of error objects visited during ErrorToString. This is
|
|
// used to detect cycles in error toString formatting.
|
|
var visited_errors = new InternalArray();
|
|
var cyclic_error_marker = new $Object();
|
|
|
|
function GetPropertyWithoutInvokingMonkeyGetters(error, name) {
|
|
var current = error;
|
|
// Climb the prototype chain until we find the holder.
|
|
while (current && !%HasOwnProperty(current, name)) {
|
|
current = %_GetPrototype(current);
|
|
}
|
|
if (IS_NULL(current)) return UNDEFINED;
|
|
if (!IS_OBJECT(current)) return error[name];
|
|
// If the property is an accessor on one of the predefined errors that can be
|
|
// generated statically by the compiler, don't touch it. This is to address
|
|
// http://code.google.com/p/chromium/issues/detail?id=69187
|
|
var desc = %GetOwnProperty(current, name);
|
|
if (desc && desc[IS_ACCESSOR_INDEX]) {
|
|
var isName = name === "name";
|
|
if (current === $ReferenceError.prototype)
|
|
return isName ? "ReferenceError" : UNDEFINED;
|
|
if (current === $SyntaxError.prototype)
|
|
return isName ? "SyntaxError" : UNDEFINED;
|
|
if (current === $TypeError.prototype)
|
|
return isName ? "TypeError" : UNDEFINED;
|
|
}
|
|
// Otherwise, read normally.
|
|
return error[name];
|
|
}
|
|
|
|
function ErrorToStringDetectCycle(error) {
|
|
if (!%PushIfAbsent(visited_errors, error)) throw cyclic_error_marker;
|
|
try {
|
|
var name = GetPropertyWithoutInvokingMonkeyGetters(error, "name");
|
|
name = IS_UNDEFINED(name) ? "Error" : TO_STRING_INLINE(name);
|
|
var message = GetPropertyWithoutInvokingMonkeyGetters(error, "message");
|
|
message = IS_UNDEFINED(message) ? "" : TO_STRING_INLINE(message);
|
|
if (name === "") return message;
|
|
if (message === "") return name;
|
|
return name + ": " + message;
|
|
} finally {
|
|
visited_errors.length = visited_errors.length - 1;
|
|
}
|
|
}
|
|
|
|
function ErrorToString() {
|
|
if (!IS_SPEC_OBJECT(this)) {
|
|
throw MakeTypeError(kCalledOnNonObject, "Error.prototype.toString");
|
|
}
|
|
|
|
try {
|
|
return ErrorToStringDetectCycle(this);
|
|
} catch(e) {
|
|
// If this error message was encountered already return the empty
|
|
// string for it instead of recursively formatting it.
|
|
if (e === cyclic_error_marker) {
|
|
return '';
|
|
}
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
|
|
InstallFunctions($Error.prototype, DONT_ENUM, ['toString', ErrorToString]);
|
|
|
|
// Boilerplate for exceptions for stack overflows. Used from
|
|
// Isolate::StackOverflow().
|
|
function SetUpStackOverflowBoilerplate() {
|
|
var boilerplate = MakeRangeError(kStackOverflow);
|
|
|
|
%DefineAccessorPropertyUnchecked(
|
|
boilerplate, 'stack', StackTraceGetter, StackTraceSetter, DONT_ENUM);
|
|
|
|
return boilerplate;
|
|
}
|
|
|
|
var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();
|