ea43173cf4
R=rossberg@chromium.org BUG=v8:3019 LOG=Y Review URL: https://codereview.chromium.org/88393002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18115 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
1363 lines
51 KiB
JavaScript
1363 lines
51 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// -------------------------------------------------------------------
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var kMessages = {
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// Error
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cyclic_proto: ["Cyclic __proto__ value"],
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code_gen_from_strings: ["%0"],
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generator_running: ["Generator is already running"],
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generator_finished: ["Generator has already finished"],
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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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malformed_regexp: ["Invalid regular expression: /", "%0", "/: ", "%1"],
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unterminated_regexp: ["Invalid regular expression: missing /"],
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regexp_flags: ["Cannot supply flags when constructing one RegExp from another"],
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incompatible_method_receiver: ["Method ", "%0", " called on incompatible receiver ", "%1"],
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invalid_lhs_in_assignment: ["Invalid left-hand side in assignment"],
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invalid_lhs_in_for_in: ["Invalid left-hand side in for-in"],
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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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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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redeclaration: ["%0", " '", "%1", "' has already been declared"],
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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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stack_trace: ["Stack Trace:\n", "%0"],
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called_non_callable: ["%0", " is not a function"],
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undefined_method: ["Object ", "%1", " has no method '", "%0", "'"],
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property_not_function: ["Property '", "%0", "' of object ", "%1", " is not a function"],
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cannot_convert_to_primitive: ["Cannot convert object to primitive value"],
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not_constructor: ["%0", " is not a constructor"],
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not_defined: ["%0", " is not defined"],
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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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non_object_property_call: ["Cannot call method '", "%0", "' of ", "%1"],
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with_expression: ["%0", " has no properties"],
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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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apply_non_function: ["Function.prototype.apply was called on ", "%0", ", which is a ", "%1", " and not a function"],
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apply_wrong_args: ["Function.prototype.apply: Arguments list has wrong type"],
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invalid_in_operator_use: ["Cannot use 'in' operator to search for '", "%0", "' in ", "%1"],
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instanceof_function_expected: ["Expecting a function in instanceof check, but got ", "%0"],
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instanceof_nonobject_proto: ["Function has non-object prototype '", "%0", "' in instanceof check"],
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undefined_or_null_to_object: ["Cannot convert undefined or null to object"],
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reduce_no_initial: ["Reduce of empty array with no initial value"],
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getter_must_be_callable: ["Getter must be a function: ", "%0"],
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setter_must_be_callable: ["Setter must be a function: ", "%0"],
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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"],
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property_desc_object: ["Property description must be an object: ", "%0"],
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redefine_disallowed: ["Cannot redefine property: ", "%0"],
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define_disallowed: ["Cannot define property:", "%0", ", object is not extensible."],
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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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handler_trap_missing: ["Proxy handler ", "%0", " has no '", "%1", "' trap"],
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handler_trap_must_be_callable: ["Proxy handler ", "%0", " has non-callable '", "%1", "' trap"],
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handler_returned_false: ["Proxy handler ", "%0", " returned false from '", "%1", "' trap"],
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handler_returned_undefined: ["Proxy handler ", "%0", " returned undefined from '", "%1", "' trap"],
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proxy_prop_not_configurable: ["Proxy handler ", "%0", " returned non-configurable descriptor for property '", "%2", "' from '", "%1", "' trap"],
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proxy_non_object_prop_names: ["Trap '", "%1", "' returned non-object ", "%0"],
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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: ["Object.observe accept 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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proto_poison_pill: ["Generic use of __proto__ accessor not allowed"],
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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_promise: ["%0", "is not a promise"],
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promise_cyclic: ["Chaining cycle detected for promise", "%0"],
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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_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", "%3"],
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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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stack_overflow: ["Maximum call stack size exceeded"],
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invalid_time_value: ["Invalid time value"],
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invalid_count_value: ["Invalid count value"],
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// SyntaxError
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paren_in_arg_string: ["Function arg string contains parenthesis"],
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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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illegal_let: ["Illegal let declaration outside extended mode"],
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error_loading_debugger: ["Error loading debugger"],
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no_input_to_regexp: ["No input to ", "%0"],
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invalid_json: ["String '", "%0", "' is not valid JSON"],
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circular_structure: ["Converting circular structure to JSON"],
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called_on_non_object: ["%0", " called on non-object"],
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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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invalid_preparser_data: ["Invalid preparser data for function ", "%0"],
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strict_mode_with: ["Strict mode code may not include a with statement"],
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strict_catch_variable: ["Catch variable may not be eval or arguments in strict mode"],
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too_many_arguments: ["Too many arguments in function call (only 32766 allowed)"],
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too_many_parameters: ["Too many parameters in function definition (only 32766 allowed)"],
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too_many_variables: ["Too many variables declared (only 131071 allowed)"],
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strict_param_name: ["Parameter name eval or arguments is not allowed in strict mode"],
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strict_param_dupe: ["Strict mode function may not have duplicate parameter names"],
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strict_var_name: ["Variable name may not be eval or arguments in strict mode"],
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strict_function_name: ["Function name may not be eval or arguments in strict mode"],
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strict_octal_literal: ["Octal literals are not allowed in strict mode."],
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strict_duplicate_property: ["Duplicate data property in object literal not allowed in strict mode"],
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accessor_data_property: ["Object literal may not have data and accessor property with the same name"],
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accessor_get_set: ["Object literal may not have multiple get/set accessors with the same name"],
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strict_lhs_assignment: ["Assignment to eval or arguments is not allowed in strict mode"],
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strict_lhs_postfix: ["Postfix increment/decrement may not have eval or arguments operand in strict mode"],
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strict_lhs_prefix: ["Prefix increment/decrement may not have eval or arguments operand in strict mode"],
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strict_reserved_word: ["Use of future reserved word in strict mode"],
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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_const: ["Use of const in strict mode."],
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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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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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unprotected_let: ["Illegal let declaration in unprotected statement context."],
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unprotected_const: ["Illegal const declaration in unprotected statement context."],
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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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harmony_const_assign: ["Assignment to constant variable."],
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symbol_to_string: ["Conversion from symbol to string"],
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invalid_module_path: ["Module does not export '", "%0", "', or export is not itself a module"],
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module_type_error: ["Module '", "%0", "' used improperly"],
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module_export_undefined: ["Export '", "%0", "' is not defined in module"]
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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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if (str.length > 256) {
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str = %SubString(str, 0, 239) + "...<omitted>..." +
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%SubString(str, str.length - 2, str.length);
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}
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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 x ? '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)) return %_CallFunction(obj, FunctionToString);
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if (IS_OBJECT(obj) && %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, ObjectToString);
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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, args) {
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if (IS_UNDEFINED(args)) args = [];
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return new constructor(FormatMessage(type, args));
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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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%SetProperty(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, args) {
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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, args);
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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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location.restrict();
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return location.sourceText();
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}
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function MakeTypeError(type, args) {
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return MakeGenericError($TypeError, type, args);
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}
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function MakeRangeError(type, args) {
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return MakeGenericError($RangeError, type, args);
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}
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function MakeSyntaxError(type, args) {
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return MakeGenericError($SyntaxError, type, args);
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}
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function MakeReferenceError(type, args) {
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return MakeGenericError($ReferenceError, type, args);
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}
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function MakeEvalError(type, args) {
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return MakeGenericError($EvalError, type, args);
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}
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function MakeError(type, args) {
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return MakeGenericError($Error, type, args);
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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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/**
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* Get information on a specific source position.
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* @param {number} position The source position
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* @param {boolean} include_resource_offset Set to true to have the resource
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* offset added to the location
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* @return {SourceLocation}
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* If line is negative or not in the source null is returned.
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*/
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function ScriptLocationFromPosition(position,
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include_resource_offset) {
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var line = this.lineFromPosition(position);
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if (line == -1) return null;
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// Determine start, end and column.
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var line_ends = this.line_ends;
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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 and script starts at zero 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.line_offset > 0 || this.column_offset > 0) {
|
|
return this.name;
|
|
}
|
|
|
|
// The result is cached as on long scripts it takes noticable time to search
|
|
// for the sourceURL.
|
|
if (this.hasCachedNameOrSourceURL) {
|
|
return this.cachedNameOrSourceURL;
|
|
}
|
|
this.hasCachedNameOrSourceURL = true;
|
|
|
|
// TODO(608): the spaces in a regexp below had to be escaped as \040
|
|
// because this file is being processed by js2c whose handling of spaces
|
|
// in regexps is broken. Also, ['"] are excluded from allowed URLs to
|
|
// avoid matches against sources that invoke evals with sourceURL.
|
|
// A better solution would be to detect these special comments in
|
|
// the scanner/parser.
|
|
var source = ToString(this.source);
|
|
var sourceUrlPos = %StringIndexOf(source, "sourceURL=", 0);
|
|
this.cachedNameOrSourceURL = this.name;
|
|
if (sourceUrlPos > 4) {
|
|
var sourceUrlPattern =
|
|
/\/\/[#@][\040\t]sourceURL=[\040\t]*([^\s\'\"]*)[\040\t]*$/gm;
|
|
// Don't reuse lastMatchInfo here, so we create a new array with room
|
|
// for four captures (array with length one longer than the index
|
|
// of the fourth capture, where the numbering is zero-based).
|
|
var matchInfo = new InternalArray(CAPTURE(3) + 1);
|
|
var match =
|
|
%_RegExpExec(sourceUrlPattern, source, sourceUrlPos - 4, matchInfo);
|
|
if (match) {
|
|
this.cachedNameOrSourceURL =
|
|
%_SubString(source, matchInfo[CAPTURE(2)], matchInfo[CAPTURE(3)]);
|
|
}
|
|
}
|
|
return this.cachedNameOrSourceURL;
|
|
}
|
|
|
|
|
|
SetUpLockedPrototype(Script,
|
|
$Array("source", "name", "line_ends", "line_offset", "column_offset",
|
|
"cachedNameOrSourceURL", "hasCachedNameOrSourceURL" ),
|
|
$Array(
|
|
"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;
|
|
}
|
|
|
|
var kLineLengthLimit = 78;
|
|
|
|
/**
|
|
* Restrict source location start and end positions to make the source slice
|
|
* no more that a certain number of characters wide.
|
|
* @param {number} opt_limit The with limit of the source text with a default
|
|
* of 78
|
|
* @param {number} opt_before The number of characters to prefer before the
|
|
* position with a default value of 10 less that the limit
|
|
*/
|
|
function SourceLocationRestrict(opt_limit, opt_before) {
|
|
// Find the actual limit to use.
|
|
var limit;
|
|
var before;
|
|
if (!IS_UNDEFINED(opt_limit)) {
|
|
limit = opt_limit;
|
|
} else {
|
|
limit = kLineLengthLimit;
|
|
}
|
|
if (!IS_UNDEFINED(opt_before)) {
|
|
before = opt_before;
|
|
} else {
|
|
// If no before is specified center for small limits and perfer more source
|
|
// before the the position that after for longer limits.
|
|
if (limit <= 20) {
|
|
before = $floor(limit / 2);
|
|
} else {
|
|
before = limit - 10;
|
|
}
|
|
}
|
|
if (before >= limit) {
|
|
before = limit - 1;
|
|
}
|
|
|
|
// If the [start, end[ interval is too big we restrict
|
|
// it in one or both ends. We make sure to always produce
|
|
// restricted intervals of maximum allowed size.
|
|
if (this.end - this.start > limit) {
|
|
var start_limit = this.position - before;
|
|
var end_limit = this.position + limit - before;
|
|
if (this.start < start_limit && end_limit < this.end) {
|
|
this.start = start_limit;
|
|
this.end = end_limit;
|
|
} else if (this.start < start_limit) {
|
|
this.start = this.end - limit;
|
|
} else {
|
|
this.end = this.start + limit;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* 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,
|
|
$Array("script", "position", "line", "column", "start", "end"),
|
|
$Array(
|
|
"restrict", SourceLocationRestrict,
|
|
"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,
|
|
$Array("script", "from_line", "to_line", "from_position", "to_position"),
|
|
$Array("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;
|
|
location.restrict();
|
|
return start_position - location.start;
|
|
}
|
|
|
|
|
|
function GetStackTraceLine(recv, fun, pos, isGlobal) {
|
|
return new CallSite(recv, fun, pos, false).toString();
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Error implementation
|
|
|
|
//TODO(rossberg)
|
|
var CallSiteReceiverKey = NEW_PRIVATE("receiver");
|
|
var CallSiteFunctionKey = NEW_PRIVATE("function");
|
|
var CallSitePositionKey = NEW_PRIVATE("position");
|
|
var CallSiteStrictModeKey = NEW_PRIVATE("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 name = GET_PRIVATE(this, CallSiteFunctionKey).name;
|
|
if (name) {
|
|
return name;
|
|
}
|
|
name = %FunctionGetInferredName(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
if (name) {
|
|
return name;
|
|
}
|
|
// Maybe this is an evaluation?
|
|
var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey));
|
|
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 {
|
|
if (this.isEval()) {
|
|
fileName = this.getScriptNameOrSourceURL();
|
|
if (!fileName) {
|
|
fileLocation = this.getEvalOrigin();
|
|
fileLocation += ", "; // Expecting source position to follow.
|
|
}
|
|
} else {
|
|
fileName = this.getFileName();
|
|
}
|
|
|
|
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, $Array("receiver", "fun", "pos"), $Array(
|
|
"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 non_strict_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);
|
|
non_strict_frames--;
|
|
frames.push(new CallSite(recv, fun, pos, (non_strict_frames < 0)));
|
|
}
|
|
return frames;
|
|
}
|
|
|
|
|
|
// Flag to prevent recursive call of Error.prepareStackTrace.
|
|
var formatting_custom_stack_trace = false;
|
|
|
|
|
|
function FormatStackTrace(obj, error_string, frames) {
|
|
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(error_string);
|
|
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, ObjectToString);
|
|
}
|
|
var constructorName = constructor.name;
|
|
if (!constructorName) {
|
|
return requireConstructor ? null :
|
|
%_CallFunction(receiver, ObjectToString);
|
|
}
|
|
return constructorName;
|
|
}
|
|
|
|
|
|
function captureStackTrace(obj, cons_opt) {
|
|
var stackTraceLimit = $Error.stackTraceLimit;
|
|
if (!stackTraceLimit || !IS_NUMBER(stackTraceLimit)) return;
|
|
if (stackTraceLimit < 0 || stackTraceLimit > 10000) {
|
|
stackTraceLimit = 10000;
|
|
}
|
|
var stack = %CollectStackTrace(obj,
|
|
cons_opt ? cons_opt : captureStackTrace,
|
|
stackTraceLimit);
|
|
|
|
var error_string = FormatErrorString(obj);
|
|
// The holder of this getter ('obj') may not be the receiver ('this').
|
|
// When this getter is called the first time, we use the context values to
|
|
// format a stack trace string and turn this accessor pair into a data
|
|
// property (on the holder).
|
|
var getter = function() {
|
|
// Stack is still a raw array awaiting to be formatted.
|
|
var result = FormatStackTrace(obj, error_string, GetStackFrames(stack));
|
|
// Turn this accessor into a data property.
|
|
%DefineOrRedefineDataProperty(obj, 'stack', result, NONE);
|
|
// Release context values.
|
|
stack = error_string = UNDEFINED;
|
|
return result;
|
|
};
|
|
|
|
// Set the 'stack' property on the receiver. If the receiver is the same as
|
|
// holder of this setter, the accessor pair is turned into a data property.
|
|
var setter = function(v) {
|
|
// Set data property on the receiver (not necessarily holder).
|
|
%DefineOrRedefineDataProperty(this, 'stack', v, NONE);
|
|
if (this === obj) {
|
|
// Release context values if holder is the same as the receiver.
|
|
stack = error_string = UNDEFINED;
|
|
}
|
|
};
|
|
|
|
%DefineOrRedefineAccessorProperty(obj, 'stack', getter, setter, DONT_ENUM);
|
|
}
|
|
|
|
|
|
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;
|
|
%SetProperty(global, name, f, DONT_ENUM);
|
|
%SetProperty(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());
|
|
}
|
|
%FunctionSetInstanceClassName(f, 'Error');
|
|
%SetProperty(f.prototype, 'constructor', f, DONT_ENUM);
|
|
%SetProperty(f.prototype, "name", name, DONT_ENUM);
|
|
%SetCode(f, function(m) {
|
|
if (%_IsConstructCall()) {
|
|
// Define all the expected properties directly on the error
|
|
// object. This avoids going through getters and setters defined
|
|
// on prototype objects.
|
|
%IgnoreAttributesAndSetProperty(this, 'stack', UNDEFINED, DONT_ENUM);
|
|
if (!IS_UNDEFINED(m)) {
|
|
%IgnoreAttributesAndSetProperty(
|
|
this, 'message', ToString(m), DONT_ENUM);
|
|
}
|
|
captureStackTrace(this, f);
|
|
} 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();
|
|
|
|
$Error.captureStackTrace = captureStackTrace;
|
|
|
|
%SetProperty($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 && !%HasLocalProperty(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 === $TypeError.prototype)
|
|
return isName ? "TypeError" : UNDEFINED;
|
|
}
|
|
// Otherwise, read normally.
|
|
return error[name];
|
|
}
|
|
|
|
function ErrorToStringDetectCycle(error) {
|
|
if (!%PushIfAbsent(visited_errors, error)) throw cyclic_error_marker;
|
|
try {
|
|
var name = GetPropertyWithoutInvokingMonkeyGetters(error, "name");
|
|
name = IS_UNDEFINED(name) ? "Error" : TO_STRING_INLINE(name);
|
|
var message = GetPropertyWithoutInvokingMonkeyGetters(error, "message");
|
|
message = IS_UNDEFINED(message) ? "" : TO_STRING_INLINE(message);
|
|
if (name === "") return message;
|
|
if (message === "") return name;
|
|
return name + ": " + message;
|
|
} finally {
|
|
visited_errors.length = visited_errors.length - 1;
|
|
}
|
|
}
|
|
|
|
function ErrorToString() {
|
|
if (!IS_SPEC_OBJECT(this)) {
|
|
throw MakeTypeError("called_on_non_object", ["Error.prototype.toString"]);
|
|
}
|
|
|
|
try {
|
|
return ErrorToStringDetectCycle(this);
|
|
} catch(e) {
|
|
// If this error message was encountered already return the empty
|
|
// string for it instead of recursively formatting it.
|
|
if (e === cyclic_error_marker) {
|
|
return '';
|
|
}
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
|
|
InstallFunctions($Error.prototype, DONT_ENUM, ['toString', ErrorToString]);
|
|
|
|
// Boilerplate for exceptions for stack overflows. Used from
|
|
// Isolate::StackOverflow().
|
|
function SetUpStackOverflowBoilerplate() {
|
|
var boilerplate = MakeRangeError('stack_overflow', []);
|
|
|
|
var error_string = boilerplate.name + ": " + boilerplate.message;
|
|
|
|
// The raw stack trace is stored as a hidden property on the holder of this
|
|
// getter, which may not be the same as the receiver. Find the holder to
|
|
// retrieve the raw stack trace and then turn this accessor pair into a
|
|
// data property.
|
|
var getter = function() {
|
|
var holder = this;
|
|
while (!IS_ERROR(holder)) {
|
|
holder = %GetPrototype(holder);
|
|
if (IS_NULL(holder)) return MakeSyntaxError('illegal_access', []);
|
|
}
|
|
var stack = %GetAndClearOverflowedStackTrace(holder);
|
|
// We may not have captured any stack trace.
|
|
if (IS_UNDEFINED(stack)) return stack;
|
|
|
|
var result = FormatStackTrace(holder, error_string, GetStackFrames(stack));
|
|
// Replace this accessor with a data property.
|
|
%DefineOrRedefineDataProperty(holder, 'stack', result, NONE);
|
|
return result;
|
|
};
|
|
|
|
// Set the 'stack' property on the receiver. If the receiver is the same as
|
|
// holder of this setter, the accessor pair is turned into a data property.
|
|
var setter = function(v) {
|
|
%DefineOrRedefineDataProperty(this, 'stack', v, NONE);
|
|
// Tentatively clear the hidden property. If the receiver is the same as
|
|
// holder, we release the raw stack trace this way.
|
|
%GetAndClearOverflowedStackTrace(this);
|
|
};
|
|
|
|
%DefineOrRedefineAccessorProperty(
|
|
boilerplate, 'stack', getter, setter, DONT_ENUM);
|
|
|
|
return boilerplate;
|
|
}
|
|
|
|
var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();
|