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test: add test for postmortem metadata validation
This commit adds a test to validate postmortem debugging metadata. When this test runs, it can check for the presence of metadata constants used by tools such as llnode and mdb and report if any have accidentally been removed. PR-URL: #17685 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Joyee Cheung <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Richard Lau <[email protected]>
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‎test/parallel/parallel.status‎

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# sample-test : PASS,FLAKY
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[true] # This section applies to all platforms
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# Postmortem debugging data is prone to accidental removal during V8 updates.
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test-postmortem-metadata: PASS,FLAKY
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[$system==win32]
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‎test/parallel/test-postmortem-metadata.js‎

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'use strict';
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// This test verifies that expected postmortem debugging metadata is present
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// in the Node.js binary. These constants are used by tools such as llnode and
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// mdb_v8, so this test ensures that they don't vanish between V8 updates.
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const common = require('../common');
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const assert = require('assert');
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const { spawnSync } = require('child_process');
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const args = [process.execPath];
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if (common.isAIX)
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args.unshift('-Xany', '-B');
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const nm = spawnSync('nm', args);
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if (nm.error && nm.error.errno === 'ENOENT')
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common.skip('nm not found on system');
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const symbolRe = /\s_?(v8dbg_.+)$/;
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const symbols = nm.stdout.toString().split('\n').reduce((filtered, line) => {
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const match = line.match(symbolRe);
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const symbol = match && match[1];
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if (symbol)
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filtered.push(symbol);
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return filtered;
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}, []);
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const missing = getExpectedSymbols().filter((symbol) => {
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return !symbols.includes(symbol);
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});
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assert.strictEqual(missing.length, 0, `Missing constants: ${missing}`);
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// This is only a function so that the long list of expected symbols can be
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// pushed to the bottom of the file for improved readability.
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function getExpectedSymbols() {
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return [
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'v8dbg_bit_field3_dictionary_map_shift',
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'v8dbg_bit_field3_number_of_own_descriptors_shift',
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'v8dbg_class_Code__instruction_size__int',
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'v8dbg_class_Code__instruction_start__uintptr_t',
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'v8dbg_class_ConsString__first__String',
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'v8dbg_class_ConsString__second__String',
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'v8dbg_class_FixedArray__data__uintptr_t',
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'v8dbg_class_FixedArrayBase__length__SMI',
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'v8dbg_class_FixedTypedArrayBase__base_pointer__Object',
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'v8dbg_class_FixedTypedArrayBase__external_pointer__Object',
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'v8dbg_class_HeapNumber__value__double',
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'v8dbg_class_HeapObject__map__Map',
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'v8dbg_class_JSArray__length__Object',
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'v8dbg_class_JSArrayBuffer__backing_store__Object',
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'v8dbg_class_JSArrayBuffer__byte_length__Object',
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'v8dbg_class_JSArrayBufferView__buffer__Object',
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'v8dbg_class_JSArrayBufferView__raw_byte_length__Object',
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'v8dbg_class_JSArrayBufferView__raw_byte_offset__Object',
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'v8dbg_class_JSDate__value__Object',
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'v8dbg_class_JSFunction__context__Context',
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'v8dbg_class_JSFunction__shared__SharedFunctionInfo',
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'v8dbg_class_JSObject__elements__Object',
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'v8dbg_class_JSObject__internal_fields__uintptr_t',
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'v8dbg_class_JSReceiver__raw_properties_or_hash__Object',
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'v8dbg_class_JSRegExp__source__Object',
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'v8dbg_class_Map__bit_field3__int',
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'v8dbg_class_Map__constructor_or_backpointer__Object',
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'v8dbg_class_Map__inobject_properties_or_constructor_function_index__int',
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'v8dbg_class_Map__instance_attributes__int',
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'v8dbg_class_Map__instance_descriptors__DescriptorArray',
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'v8dbg_class_Map__instance_size__int',
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'v8dbg_class_Oddball__kind_offset__int',
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'v8dbg_class_Script__line_ends__Object',
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'v8dbg_class_Script__line_offset__SMI',
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'v8dbg_class_Script__name__Object',
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'v8dbg_class_Script__source__Object',
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'v8dbg_class_SeqOneByteString__chars__char',
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'v8dbg_class_SeqTwoByteString__chars__char',
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'v8dbg_class_SharedFunctionInfo__code__Code',
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'v8dbg_class_SharedFunctionInfo__compiler_hints__int',
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'v8dbg_class_SharedFunctionInfo__end_position__int',
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'v8dbg_class_SharedFunctionInfo__function_identifier__Object',
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'v8dbg_class_SharedFunctionInfo__internal_formal_parameter_count__int',
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'v8dbg_class_SharedFunctionInfo__raw_name__Object',
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'v8dbg_class_SharedFunctionInfo__scope_info__ScopeInfo',
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'v8dbg_class_SharedFunctionInfo__script__Object',
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'v8dbg_class_SharedFunctionInfo__start_position_and_type__int',
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'v8dbg_class_SlicedString__offset__SMI',
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'v8dbg_class_SlicedString__parent__String',
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'v8dbg_class_String__length__SMI',
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'v8dbg_class_ThinString__actual__String',
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'v8dbg_context_idx_closure',
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'v8dbg_context_idx_prev',
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'v8dbg_context_min_slots',
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'v8dbg_frametype_ArgumentsAdaptorFrame',
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'v8dbg_frametype_ConstructEntryFrame',
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'v8dbg_frametype_ConstructFrame',
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'v8dbg_frametype_EntryFrame',
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'v8dbg_frametype_ExitFrame',
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'v8dbg_frametype_InternalFrame',
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'v8dbg_frametype_OptimizedFrame',
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'v8dbg_frametype_StubFrame',
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'v8dbg_jsarray_buffer_was_neutered_mask',
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'v8dbg_jsarray_buffer_was_neutered_shift',
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'v8dbg_namedictionary_prefix_start_index',
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'v8dbg_namedictionaryshape_entry_size',
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'v8dbg_namedictionaryshape_prefix_size',
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'v8dbg_off_fp_args',
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'v8dbg_off_fp_context',
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'v8dbg_off_fp_function',
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'v8dbg_prop_attributes_mask',
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'v8dbg_prop_attributes_shift',
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'v8dbg_prop_attributes_DONT_ENUM',
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'v8dbg_prop_attributes_DONT_ENUM',
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'v8dbg_prop_attributes_NONE',
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'v8dbg_prop_attributes_READ_ONLY',
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'v8dbg_prop_desc_details',
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'v8dbg_prop_desc_key',
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'v8dbg_prop_desc_size',
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'v8dbg_prop_desc_value',
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'v8dbg_prop_idx_first',
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'v8dbg_prop_index_mask',
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'v8dbg_prop_index_shift',
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'v8dbg_prop_kind_mask',
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'v8dbg_prop_kind_Accessor',
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'v8dbg_prop_kind_Data',
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'v8dbg_prop_location_mask',
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'v8dbg_prop_location_shift',
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'v8dbg_prop_location_Descriptor',
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'v8dbg_prop_location_Field',
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'v8dbg_prop_representation_double',
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'v8dbg_prop_representation_mask',
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'v8dbg_prop_representation_shift',
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'v8dbg_scopeinfo_idx_first_vars',
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'v8dbg_scopeinfo_idx_ncontextlocals',
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'v8dbg_scopeinfo_idx_nparams',
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'v8dbg_scopeinfo_idx_nstacklocals',
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'v8dbg_sharedfunctioninfo_start_position_mask',
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'v8dbg_sharedfunctioninfo_start_position_shift',
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'v8dbg_type_Code__CODE_TYPE',
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'v8dbg_type_FixedArray__FIXED_ARRAY_TYPE',
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'v8dbg_type_HeapNumber__HEAP_NUMBER_TYPE',
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'v8dbg_type_JSArray__JS_ARRAY_TYPE',
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'v8dbg_type_JSArrayBuffer__JS_ARRAY_BUFFER_TYPE',
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'v8dbg_type_JSDate__JS_DATE_TYPE',
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'v8dbg_type_JSFunction__JS_FUNCTION_TYPE',
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'v8dbg_type_JSGlobalObject__JS_GLOBAL_OBJECT_TYPE',
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'v8dbg_type_JSGlobalProxy__JS_GLOBAL_PROXY_TYPE',
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'v8dbg_type_JSObject__JS_OBJECT_TYPE',
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'v8dbg_type_JSRegExp__JS_REGEXP_TYPE',
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'v8dbg_type_JSTypedArray__JS_TYPED_ARRAY_TYPE',
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'v8dbg_type_Map__MAP_TYPE',
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'v8dbg_type_Oddball__ODDBALL_TYPE',
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'v8dbg_type_Script__SCRIPT_TYPE',
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'v8dbg_type_SharedFunctionInfo__SHARED_FUNCTION_INFO_TYPE',
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'v8dbg_APIObjectType',
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'v8dbg_ConsStringTag',
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'v8dbg_ExternalStringTag',
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'v8dbg_FirstNonstringType',
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'v8dbg_HeapObjectTag',
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'v8dbg_HeapObjectTagMask',
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'v8dbg_OddballException',
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'v8dbg_OddballFalse',
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'v8dbg_OddballNull',
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'v8dbg_OddballTheHole',
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'v8dbg_OddballTrue',
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'v8dbg_OddballUndefined',
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'v8dbg_OddballUninitialized',
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'v8dbg_OneByteStringTag',
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'v8dbg_PointerSizeLog2',
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'v8dbg_SeqStringTag',
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'v8dbg_SlicedStringTag',
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'v8dbg_SmiShiftSize',
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'v8dbg_SmiTag',
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'v8dbg_SmiTagMask',
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'v8dbg_SpecialAPIObjectType',
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'v8dbg_StringEncodingMask',
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'v8dbg_StringRepresentationMask',
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'v8dbg_ThinStringTag',
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'v8dbg_TwoByteStringTag',
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];
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}

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