[DI] Add ability to take state snapshot by watson · Pull Request #4549 · DataDog/dd-trace-js

watson · 2024-07-23T14:22:17Z

Take a "snapshot" of the variables that are in scope when a probe is hit (except the global scope, which intentionally have been omitted since it's too noisy):

For each variable in scope, we traverse objects and their properties up to maxReferenceDepth deep (default i 3 levels).
Strings are truncated to maxLength (default is 255 characters).
Binary data is converted to strings with appropriate escaping of non printable characters (the maxLength limit is also applied)

Out of scope:

Information about this is not captured.
maxCollectionSize limit
maxFieldCount limit
Special handling for snapshots larger than 1MB (e.g. snapshot pruning or something simpler)
PII redaction

Note to reviewers

The algorithm to collect the snapshot is located in:

packages/dd-trace/src/debugger/devtools_client/snapshot/collector.js

The post-processing of the collected state to get it into the format expected by the DI endpoint is located in:

packages/dd-trace/src/debugger/devtools_client/snapshot/processor.js

To make it easier to understand what data is being operated on in processor.js when reviewing, here's some example data from two of the unit tests in packages/dd-trace/test/debugger/devtools_client/snapshot.spec.js:

Output of `collector.js` for primitive types (from the unit test "should return expected object for primitives")

[
  {
    name: 'undef',
    value: { type: 'undefined' },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'nil',
    value: { type: 'object', subtype: 'null', value: null },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'bool',
    value: { type: 'boolean', value: true },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'num',
    value: { type: 'number', value: 42, description: '42' },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'bigint',
    value: {
      type: 'bigint',
      unserializableValue: '18014398509481982n',
      description: '18014398509481982n'
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'str',
    value: { type: 'string', value: 'foo' },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'sym',
    value: {
      type: 'symbol',
      description: 'Symbol(foo)',
      objectId: '4293226926560230981.1.9'
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'a1',
    value: { type: 'number', value: 1, description: '1' },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'a2',
    value: { type: 'number', value: 2, description: '2' },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'ref',
    value: {
      type: 'object',
      className: 'Object',
      description: 'Object',
      objectId: '4293226926560230981.1.10',
      properties: [
        {
          name: 'wmo1',
          value: {
            type: 'object',
            className: 'Object',
            description: 'Object',
            objectId: '4293226926560230981.1.12',
            properties: [
              {
                name: 'a',
                value: { type: 'number', value: 1, description: '1' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'wmo2',
          value: {
            type: 'object',
            className: 'Object',
            description: 'Object',
            objectId: '4293226926560230981.1.13',
            properties: [
              {
                name: 'b',
                value: { type: 'number', value: 3, description: '3' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'wso1',
          value: {
            type: 'object',
            className: 'Object',
            description: 'Object',
            objectId: '4293226926560230981.1.14',
            properties: [
              {
                name: 'a',
                value: { type: 'number', value: 1, description: '1' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'wso2',
          value: {
            type: 'object',
            className: 'Object',
            description: 'Object',
            objectId: '4293226926560230981.1.15',
            properties: [
              {
                name: 'a',
                value: { type: 'number', value: 2, description: '2' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'wso3',
          value: {
            type: 'object',
            className: 'Object',
            description: 'Object',
            objectId: '4293226926560230981.1.16',
            properties: [
              {
                name: 'a',
                value: { type: 'number', value: 3, description: '3' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'get',
    value: {
      type: 'function',
      className: 'Function',
      description: 'function get () {\n' +
        '  const bigint = BigInt(Number.MAX_SAFE_INTEGER) * 2n\n' +
        '\n' +
        '  let e, g\n' +
        '  const oblit = {\n' +
        '    a: 1,\n' +
        '    b: 2,\n' +
        '    c: 3,\n' +
        '    // Has no side-effect\n' +
        '    // TODO: At some point it would be great to detect this and get the value,\n' +
        '    // though currently we can neither detect it, nor execute the getter.\n' +
        '    get d () {\n' +
        '      return 4\n' +
        '    },\n' +
        '    // Has side-effect: We should never try to fetch this!\n' +
        '    get e () {\n' +
        '      e = Math.random()\n' +
        '      return e\n' +
        '    },\n' +
        '    // Only setter\n' +
        '    set f (v) {}, // eslint-disable-line accessor-pairs\n' +
        '    // Both getter and setter\n' +
        '    get g () { return g },\n' +
        '    set g (x) { g = x }\n' +
        '  }\n' +
        '\n' +
        '  function fnWithProperties (a, b) {}\n' +
        '  fnWithProperties.foo = { bar: 42 }\n' +
        '\n' +
        '  class MyClass {\n' +
        '    #secret = 42\n' +
        '    constructor () {\n' +
        '      this.foo = this.#secret\n' +
        '    }\n' +
        '  }\n' +
        '\n' +
        '  // const myIterator = {\n' +
        '  //   next () { return { value: 42, done: true } },\n' +
        '  //   * [Symbol.iterator] () {\n' +
        '  //     yield 1\n' +
        '  //   }\n' +
        '  // }\n' +
        '\n' +
        '  function * makeIterator () {\n' +
        '    yield 1\n' +
        '    yield 2\n' +
        '  }\n' +
        '  const gen = makeIterator()\n' +
        '  gen.foo = 42\n' +
        '\n' +
        '  class CustomError extends Error {\n' +
        '    constructor (...args) {\n' +
        '      super(...args)\n' +
        '      this.foo = 42\n' +
        '    }\n' +
        '  }\n' +
        "  const err = new CustomError('boom!')\n" +
        '\n' +
        "  const buf1 = Buffer.from('IBM')\n" +
        "  const buf2 = Buffer.from('hello\\x01\\x02\\x03world')\n" +
        '\n' +
        '  const arrayBuffer = new ArrayBuffer(buf1.length)\n' +
        '  const sharedArrayBuffer = new SharedArrayBuffer(buf2.length)\n' +
        '\n' +
        '  const typedArray = new Int8Array(arrayBuffer)\n' +
        '  for (let i = 0; i < buf1.length; i++) typedArray[i] = buf1[i] - 1\n' +
        '\n' +
        '  const sharedTypedArray = new Int8Array(sharedArrayBuffer)\n' +
        '  for (let i = 0; i < buf2.length; i++) sharedTypedArray[i] = buf2[i]\n' +
        '\n' +
        '  // const dataView = new DataView(new ArrayBuffer(3))\n' +
        '  // dataView.setUint8(0, 42)\n' +
        '\n' +
        '  const result = {\n' +
        '    primitives: {\n' +
        '      undef: undefined,\n' +
        '      nil: null,\n' +
        '      bool: true,\n' +
        '      num: 42,\n' +
        '      bigint,\n' +
        "      str: 'foo',\n" +
        "      sym: Symbol('foo')\n" +
        '    },\n' +
        '    complexTypes: {\n' +
        '      oblit,\n' +
        '      obnew: new MyClass(),\n' +
        '      arr: [1, 2, 3],\n' +
        '      regex: /foo/,\n' +
        "      date: new Date('2024-09-20T07:22:59.998Z'),\n" +
        '      map: new Map([[1, 2], [3, 4]]),\n' +
        '      set: new Set([[1, 2], 3, 4]),\n' +
        '      wmap: new WeakMap([[ref.wmo1, 2], [ref.wmo2, 4]]),\n' +
        '      wset: new WeakSet([ref.wso1, ref.wso2, ref.wso3]),\n' +
        '      // itr: myIterator,\n' +
        '      gen,\n' +
        '      err,\n' +
        '      fn: fnWithProperties,\n' +
        '      afn: () => { return 42 },\n' +
        '      cls: MyClass,\n' +
        '      acls: class\n' +
        '            {}, // eslint-disable-line indent, brace-style\n' +
        '      prox: new Proxy({ target: true }, { get () { return false } }),\n' +
        '      custProx: new Proxy(new MyClass(), { get () { return false } }),\n' +
        '      pPen: new Promise(() => {}),\n' +
        "      pRes: Promise.resolve('resolved value'),\n" +
        "      pRej: Promise.reject('rejected value'), // eslint-disable-line prefer-promise-reject-errors\n" +
        "      tarr: typedArray, // TODO: Should we test other TypedArray's?\n" +
        '      ab: arrayBuffer,\n' +
        '      sab: sharedArrayBuffer\n' +
        '      // dv: dataView\n' +
        '      // wam: new WebAssembly.Memory({\n' +
        '      //   initial: 10,\n' +
        '      //   maximum: 100\n' +
        '      // }),\n' +
        "      // wav: new WebAssembly.Table({ initial: 2, element: 'anyfunc' }).get(0)\n" +
        '    },\n' +
        '    nested: {\n' +
        '      myNestedObj: {\n' +
        '        deepObj: { foo: { foo: { foo: { foo: { foo: true } } } } },\n' +
        '        deepArr: [[[[[42]]]]]\n' +
        '      }\n' +
        '    }\n' +
        '  }\n' +
        '\n' +
        '  result.complexTypes.circular = result.complexTypes\n' +
        '\n' +
        "  Object.defineProperty(result.complexTypes, 'hidden', {\n" +
        "    value: 'secret',\n" +
        '    enumerable: false\n' +
        '  })\n' +
        '\n' +
        "  // ensure we don't get an unhandled promise rejection error\n" +
        '  result.complexTypes.pRej.catch(() => {})\n' +
        '\n' +
        '  return result\n' +
        '}',
      objectId: '4293226926560230981.1.11',
      properties: [
        {
          name: 'length',
          value: { type: 'number', value: 0, description: '0' },
          writable: false,
          configurable: true,
          enumerable: false,
          isOwn: true
        },
        {
          name: 'name',
          value: { type: 'string', value: 'get' },
          writable: false,
          configurable: true,
          enumerable: false,
          isOwn: true
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  }
]

Output of `collector.js` for complex types (from the unit test "should contain expected properties from local and closure scope")

[
  {
    name: 'oblit',
    value: {
      type: 'object',
      className: 'Object',
      description: 'Object',
      objectId: '-5688388600467275026.1.9',
      properties: [
        {
          name: 'a',
          value: { type: 'number', value: 1, description: '1' },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'b',
          value: { type: 'number', value: 2, description: '2' },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'c',
          value: { type: 'number', value: 3, description: '3' },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'd',
          get: {
            type: 'function',
            className: 'Function',
            description: 'get d () {\n      return 4\n    }',
            objectId: '-5688388600467275026.1.33'
          },
          set: { type: 'undefined' },
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'e',
          get: {
            type: 'function',
            className: 'Function',
            description: 'get e () {\n      e = Math.random()\n      return e\n    }',
            objectId: '-5688388600467275026.1.34'
          },
          set: { type: 'undefined' },
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'f',
          get: { type: 'undefined' },
          set: {
            type: 'function',
            className: 'Function',
            description: 'set f (v) {}',
            objectId: '-5688388600467275026.1.35'
          },
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'g',
          get: {
            type: 'function',
            className: 'Function',
            description: 'get g () { return g }',
            objectId: '-5688388600467275026.1.36'
          },
          set: {
            type: 'function',
            className: 'Function',
            description: 'set g (x) { g = x }',
            objectId: '-5688388600467275026.1.37'
          },
          configurable: true,
          enumerable: true,
          isOwn: true
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'obnew',
    value: {
      type: 'object',
      className: 'MyClass',
      description: 'MyClass',
      objectId: '-5688388600467275026.1.10',
      properties: [
        {
          name: 'foo',
          value: { type: 'number', value: 42, description: '42' },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: '#secret',
          value: { type: 'number', value: 42, description: '42' }
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'arr',
    value: {
      type: 'object',
      subtype: 'array',
      className: 'Array',
      description: 'Array(3)',
      objectId: '-5688388600467275026.1.11',
      properties: [
        {
          name: '0',
          value: { type: 'number', value: 1, description: '1' },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: '1',
          value: { type: 'number', value: 2, description: '2' },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: '2',
          value: { type: 'number', value: 3, description: '3' },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'length',
          value: { type: 'number', value: 3, description: '3' },
          writable: true,
          configurable: false,
          enumerable: false,
          isOwn: true
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'regex',
    value: {
      type: 'object',
      subtype: 'regexp',
      className: 'RegExp',
      description: '/foo/',
      objectId: '-5688388600467275026.1.12'
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'date',
    value: {
      type: 'object',
      subtype: 'date',
      className: 'Date',
      description: 'Fri Sep 20 2024 09:22:59 GMT+0200 (Central European Summer Time)',
      objectId: '-5688388600467275026.1.13'
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'map',
    value: {
      type: 'object',
      subtype: 'map',
      className: 'Map',
      description: 'Map(2)',
      objectId: '-5688388600467275026.1.14',
      properties: [
        {
          name: '0',
          value: {
            type: 'object',
            subtype: 'internal#entry',
            className: 'Object',
            description: '{1 => 2}',
            objectId: '-5688388600467275026.1.43',
            properties: [
              {
                name: 'key',
                value: { type: 'number', value: 1, description: '1' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              },
              {
                name: 'value',
                value: { type: 'number', value: 2, description: '2' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: '1',
          value: {
            type: 'object',
            subtype: 'internal#entry',
            className: 'Object',
            description: '{3 => 4}',
            objectId: '-5688388600467275026.1.44',
            properties: [
              {
                name: 'key',
                value: { type: 'number', value: 3, description: '3' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              },
              {
                name: 'value',
                value: { type: 'number', value: 4, description: '4' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'length',
          value: { type: 'number', value: 2, description: '2' },
          writable: true,
          configurable: false,
          enumerable: false,
          isOwn: true
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'set',
    value: {
      type: 'object',
      subtype: 'set',
      className: 'Set',
      description: 'Set(3)',
      objectId: '-5688388600467275026.1.15',
      properties: [
        {
          name: '0',
          value: {
            type: 'object',
            subtype: 'internal#entry',
            className: 'Object',
            description: 'Array(2)',
            objectId: '-5688388600467275026.1.47',
            properties: [
              {
                name: 'value',
                value: {
                  type: 'object',
                  subtype: 'array',
                  className: 'Array',
                  description: 'Array(2)',
                  objectId: '-5688388600467275026.1.50',
                  properties: [
                    {
                      name: '0',
                      value: { type: 'number', value: 1, description: '1' },
                      writable: true,
                      configurable: true,
                      enumerable: true,
                      isOwn: true
                    },
                    {
                      name: '1',
                      value: { type: 'number', value: 2, description: '2' },
                      writable: true,
                      configurable: true,
                      enumerable: true,
                      isOwn: true
                    },
                    {
                      name: 'length',
                      value: { type: 'number', value: 2, description: '2' },
                      writable: true,
                      configurable: false,
                      enumerable: false,
                      isOwn: true
                    }
                  ]
                },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: '1',
          value: {
            type: 'object',
            subtype: 'internal#entry',
            className: 'Object',
            description: '3',
            objectId: '-5688388600467275026.1.48',
            properties: [
              {
                name: 'value',
                value: { type: 'number', value: 3, description: '3' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: '2',
          value: {
            type: 'object',
            subtype: 'internal#entry',
            className: 'Object',
            description: '4',
            objectId: '-5688388600467275026.1.49',
            properties: [
              {
                name: 'value',
                value: { type: 'number', value: 4, description: '4' },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              }
            ]
          },
          writable: true,
          configurable: true,
          enumerable: true,
          isOwn: true
        },
        {
          name: 'length',
          value: { type: 'number', value: 3, description: '3' },
          writable: true,
          configurable: false,
          enumerable: false,
          isOwn: true
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  },
  {
    name: 'wmap',
    value: {
      type: 'object',
      subtype: 'weakmap',
      className: 'WeakMap',
      description: 'WeakMap',
      objectId: '-5688388600467275026.1.16',
      properties: [
        {
          name: '0',
          value: {
            type: 'object',
            subtype: 'internal#entry',
            className: 'Object',
            description: '{Object => 4}',
            objectId: '-5688388600467275026.1.54',
            properties: [
              {
                name: 'key',
                value: {
                  type: 'object',
                  className: 'Object',
                  description: 'Object',
                  objectId: '-5688388600467275026.1.56',
                  properties: [
                    {
                      name: 'b',
                      value: { type: 'number', value: 3, description: '3' },
                      writable: true,
                      configurable: true,
                      enumerable: true,
                      isOwn: true
                    }
                  ]
                },
                writable: true,
                configurable: true,
                enumerable: true,
                isOwn: true
              },
              {
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                      name: '2',
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                name: 'sab',
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                    {
                      name: '4',
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                      writable: true,
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                    {
                      name: '5',
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                    {
                      name: '7',
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                    {
                      name: '8',
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                        type: 'number',
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                      writable: true,
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                    {
                      name: '9',
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                      name: '10',
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                    {
                      name: '11',
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                      writable: true,
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                    {
                      name: '12',
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                        type: 'number',
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                      writable: true,
                      configurable: true,
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                  ]
                },
                writable: true,
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              {
                name: 'circular',
                value: {
                  type: 'object',
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                        objectId: '-5688388600467275026.1.313'
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                      name: 'obnew',
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                      name: 'arr',
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                        type: 'object',
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                        description: 'Array(3)',
                        objectId: '-5688388600467275026.1.315'
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                      writable: true,
                      configurable: true,
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                    {
                      name: 'regex',
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                        type: 'object',
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                        className: 'RegExp',
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                        objectId: '-5688388600467275026.1.316'
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                      writable: true,
                      configurable: true,
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                    {
                      name: 'date',
                      value: {
                        type: 'object',
                        subtype: 'date',
                        className: 'Date',
                        description: 'Fri Sep 20 2024 09:22:59 GMT+0200 (Central European Summer Time)',
                        objectId: '-5688388600467275026.1.317'
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                      writable: true,
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                    {
                      name: 'map',
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                        type: 'object',
                        subtype: 'map',
                        className: 'Map',
                        description: 'Map(2)',
                        objectId: '-5688388600467275026.1.318'
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                      writable: true,
                      configurable: true,
                      enumerable: true,
                      isOwn: true
                    },
                    {
                      name: 'set',
                      value: {
                        type: 'object',
                        subtype: 'set',
                        className: 'Set',
                        description: 'Set(3)',
                        objectId: '-5688388600467275026.1.319'
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                      writable: true,
                      configurable: true,
                      enumerable: true,
                      isOwn: true
                    },
                    {
                      name: 'wmap',
                      value: {
                        type: 'object',
                        subtype: 'weakmap',
                        className: 'WeakMap',
                        description: 'WeakMap',
                        objectId: '-5688388600467275026.1.320'
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                      writable: true,
                      configurable: true,
                      enumerable: true,
                      isOwn: true
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                    {
                      name: 'wset',
                      value: {
                        type: 'object',
                        subtype: 'weakset',
                        className: 'WeakSet',
                        description: 'WeakSet',
                        objectId: '-5688388600467275026.1.321'
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                      writable: true,
                      configurable: true,
                      enumerable: true,
                      isOwn: true
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                    {
                      name: 'gen',
                      value: {
                        type: 'object',
                        subtype: 'generator',
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                    {
                      name: 'err',
                      value: {
                        type: 'object',
                        subtype: 'error',
                        className: 'CustomError',
                        description: 'Error: boom!\n' +
                          '    at get (/Users/thomas.watson/go/src/github.com/DataDog/node_modules/dd-trace/packages/dd-trace/test/debugger/devtools_client/_inspected_file.js:89:15)\n' +
                          '    at getComplextTypes (/Users/thomas.watson/go/src/github.com/DataDog/node_modules/dd-trace/packages/dd-trace/test/debugger/devtools_client/_inspected_file.js:11:165)\n' +
                          '    at Test.<anonymous> (/Users/thomas.watson/go/src/github.com/DataDog/node_modules/dd-trace/packages/dd-trace/test/debugger/devtools_client/snapshot.spec.js:355:7)',
                        objectId: '-5688388600467275026.1.323'
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                        type: 'function',
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                          '    constructor () {\n' +
                          '      this.foo = this.#secret\n' +
                          '    }\n' +
                          '  }',
                        objectId: '-5688388600467275026.1.326'
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                      writable: true,
                      configurable: true,
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                        type: 'function',
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                        description: 'class\n            {}',
                        objectId: '-5688388600467275026.1.327'
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                    {
                      name: 'custProx',
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                        type: 'object',
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                        className: 'Object',
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                        objectId: '-5688388600467275026.1.329'
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                      writable: true,
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                      name: 'pPen',
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                        type: 'object',
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                      name: 'pRes',
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  {
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        '  const oblit = {\n' +
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        '    b: 2,\n' +
        '    c: 3,\n' +
        '    // Has no side-effect\n' +
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        '  class MyClass {\n' +
        '    #secret = 42\n' +
        '    constructor () {\n' +
        '      this.foo = this.#secret\n' +
        '    }\n' +
        '  }\n' +
        '\n' +
        '  // const myIterator = {\n' +
        '  //   next () { return { value: 42, done: true } },\n' +
        '  //   * [Symbol.iterator] () {\n' +
        '  //     yield 1\n' +
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        '  // }\n' +
        '\n' +
        '  function * makeIterator () {\n' +
        '    yield 1\n' +
        '    yield 2\n' +
        '  }\n' +
        '  const gen = makeIterator()\n' +
        '  gen.foo = 42\n' +
        '\n' +
        '  class CustomError extends Error {\n' +
        '    constructor (...args) {\n' +
        '      super(...args)\n' +
        '      this.foo = 42\n' +
        '    }\n' +
        '  }\n' +
        "  const err = new CustomError('boom!')\n" +
        '\n' +
        "  const buf1 = Buffer.from('IBM')\n" +
        "  const buf2 = Buffer.from('hello\\x01\\x02\\x03world')\n" +
        '\n' +
        '  const arrayBuffer = new ArrayBuffer(buf1.length)\n' +
        '  const sharedArrayBuffer = new SharedArrayBuffer(buf2.length)\n' +
        '\n' +
        '  const typedArray = new Int8Array(arrayBuffer)\n' +
        '  for (let i = 0; i < buf1.length; i++) typedArray[i] = buf1[i] - 1\n' +
        '\n' +
        '  const sharedTypedArray = new Int8Array(sharedArrayBuffer)\n' +
        '  for (let i = 0; i < buf2.length; i++) sharedTypedArray[i] = buf2[i]\n' +
        '\n' +
        '  // const dataView = new DataView(new ArrayBuffer(3))\n' +
        '  // dataView.setUint8(0, 42)\n' +
        '\n' +
        '  const result = {\n' +
        '    primitives: {\n' +
        '      undef: undefined,\n' +
        '      nil: null,\n' +
        '      bool: true,\n' +
        '      num: 42,\n' +
        '      bigint,\n' +
        "      str: 'foo',\n" +
        "      sym: Symbol('foo')\n" +
        '    },\n' +
        '    complexTypes: {\n' +
        '      oblit,\n' +
        '      obnew: new MyClass(),\n' +
        '      arr: [1, 2, 3],\n' +
        '      regex: /foo/,\n' +
        "      date: new Date('2024-09-20T07:22:59.998Z'),\n" +
        '      map: new Map([[1, 2], [3, 4]]),\n' +
        '      set: new Set([[1, 2], 3, 4]),\n' +
        '      wmap: new WeakMap([[ref.wmo1, 2], [ref.wmo2, 4]]),\n' +
        '      wset: new WeakSet([ref.wso1, ref.wso2, ref.wso3]),\n' +
        '      // itr: myIterator,\n' +
        '      gen,\n' +
        '      err,\n' +
        '      fn: fnWithProperties,\n' +
        '      afn: () => { return 42 },\n' +
        '      cls: MyClass,\n' +
        '      acls: class\n' +
        '            {}, // eslint-disable-line indent, brace-style\n' +
        '      prox: new Proxy({ target: true }, { get () { return false } }),\n' +
        '      custProx: new Proxy(new MyClass(), { get () { return false } }),\n' +
        '      pPen: new Promise(() => {}),\n' +
        "      pRes: Promise.resolve('resolved value'),\n" +
        "      pRej: Promise.reject('rejected value'), // eslint-disable-line prefer-promise-reject-errors\n" +
        "      tarr: typedArray, // TODO: Should we test other TypedArray's?\n" +
        '      ab: arrayBuffer,\n' +
        '      sab: sharedArrayBuffer\n' +
        '      // dv: dataView\n' +
        '      // wam: new WebAssembly.Memory({\n' +
        '      //   initial: 10,\n' +
        '      //   maximum: 100\n' +
        '      // }),\n' +
        "      // wav: new WebAssembly.Table({ initial: 2, element: 'anyfunc' }).get(0)\n" +
        '    },\n' +
        '    nested: {\n' +
        '      myNestedObj: {\n' +
        '        deepObj: { foo: { foo: { foo: { foo: { foo: true } } } } },\n' +
        '        deepArr: [[[[[42]]]]]\n' +
        '      }\n' +
        '    }\n' +
        '  }\n' +
        '\n' +
        '  result.complexTypes.circular = result.complexTypes\n' +
        '\n' +
        "  Object.defineProperty(result.complexTypes, 'hidden', {\n" +
        "    value: 'secret',\n" +
        '    enumerable: false\n' +
        '  })\n' +
        '\n' +
        "  // ensure we don't get an unhandled promise rejection error\n" +
        '  result.complexTypes.pRej.catch(() => {})\n' +
        '\n' +
        '  return result\n' +
        '}',
      objectId: '-5688388600467275026.1.339',
      properties: [
        {
          name: 'length',
          value: { type: 'number', value: 0, description: '0' },
          writable: false,
          configurable: true,
          enumerable: false,
          isOwn: true
        },
        {
          name: 'name',
          value: { type: 'string', value: 'get' },
          writable: false,
          configurable: true,
          enumerable: false,
          isOwn: true
        }
      ]
    },
    writable: true,
    configurable: true,
    enumerable: true,
    isOwn: true
  }
]

watson · 2024-07-23T14:22:40Z

Added foo property to probe result #4757
[DI] Add ability to take state snapshot #4549 👈
[DI] Switch unit tests to Mocha instead of Tap #4728
[DI] Add stack trace to log probe results #4727 : 1 other dependent PR (#4729 )
master

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github-actions · 2024-07-23T14:22:58Z

Overall package size

Self size: 7.3 MB
Deduped: 62.71 MB
No deduping: 62.99 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | @datadog/native-appsec | 8.1.1 | 18.67 MB | 18.68 MB | | @datadog/native-iast-taint-tracking | 3.1.0 | 12.27 MB | 12.28 MB | | @datadog/pprof | 5.3.0 | 9.85 MB | 10.22 MB | | protobufjs | 7.2.5 | 2.77 MB | 5.16 MB | | @datadog/native-iast-rewriter | 2.4.1 | 2.14 MB | 2.23 MB | | @opentelemetry/core | 1.14.0 | 872.87 kB | 1.47 MB | | @datadog/native-metrics | 2.0.0 | 898.77 kB | 1.3 MB | | @opentelemetry/api | 1.8.0 | 1.21 MB | 1.21 MB | | jsonpath-plus | 9.0.0 | 580.4 kB | 1.03 MB | | import-in-the-middle | 1.11.2 | 112.74 kB | 826.22 kB | | msgpack-lite | 0.1.26 | 201.16 kB | 281.59 kB | | opentracing | 0.14.7 | 194.81 kB | 194.81 kB | | pprof-format | 2.1.0 | 111.69 kB | 111.69 kB | | @datadog/sketches-js | 2.1.0 | 109.9 kB | 109.9 kB | | semver | 7.6.3 | 95.82 kB | 95.82 kB | | lodash.sortby | 4.7.0 | 75.76 kB | 75.76 kB | | lru-cache | 7.14.0 | 74.95 kB | 74.95 kB | | ignore | 5.3.1 | 51.46 kB | 51.46 kB | | int64-buffer | 0.1.10 | 49.18 kB | 49.18 kB | | shell-quote | 1.8.1 | 44.96 kB | 44.96 kB | | istanbul-lib-coverage | 3.2.0 | 29.34 kB | 29.34 kB | | rfdc | 1.3.1 | 25.21 kB | 25.21 kB | | tlhunter-sorted-set | 0.1.0 | 24.94 kB | 24.94 kB | | limiter | 1.1.5 | 23.17 kB | 23.17 kB | | dc-polyfill | 0.1.4 | 23.1 kB | 23.1 kB | | retry | 0.13.1 | 18.85 kB | 18.85 kB | | jest-docblock | 29.7.0 | 8.99 kB | 12.76 kB | | crypto-randomuuid | 1.0.0 | 11.18 kB | 11.18 kB | | koalas | 1.0.2 | 6.47 kB | 6.47 kB | | path-to-regexp | 0.1.10 | 6.38 kB | 6.38 kB | | module-details-from-path | 1.0.3 | 4.47 kB | 4.47 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

pr-commenter · 2024-07-23T14:31:21Z

Benchmarks

Benchmark execution time: 2024-10-03 13:05:13

Comparing candidate commit c4dc156 in PR branch watson/DEBUG-2605/snapshot with baseline commit f988e00 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 259 metrics, 7 unstable metrics.

codecov · 2024-07-26T08:05:21Z

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.11%. Comparing base (e4bd929) to head (7dba831).

Additional details and impacted files

@@                   Coverage Diff                    @@
##           watson/DEBUG-2532/di    #4549      +/-   ##
========================================================
- Coverage                 88.44%   88.11%   -0.33%     
========================================================
  Files                       263      259       -4     
  Lines                     11371    11303      -68     
  Branches                     33       33              
========================================================
- Hits                      10057     9960      -97     
- Misses                     1314     1343      +29

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

shatzi

great progress

shatzi · 2024-10-03T14:06:04Z

I would love to sit down and see examples of each of those.

I think capture the BoundThis would be beneficial for debugging - as it would let the user know what the instance that was bounded.

What I'm not sure if those also expose as locals and args (specifically for BoundArgs) - if they are duplicated, not sure this worth the effort. but if they are not captured, I think those values would improve the debug experience.

watson mentioned this pull request Jul 23, 2024

Prepare support for Dynamic Instrumentation #4492

Merged

3 tasks

watson self-assigned this Jul 23, 2024

watson added the semver-patch label Jul 23, 2024

watson force-pushed the watson/DEBUG-2532/di branch from 781e729 to 5cb52d8 Compare July 25, 2024 06:50

watson force-pushed the watson/DEBUG-2605/snapshot branch from 8639412 to 60ed8b6 Compare July 25, 2024 06:50

watson force-pushed the watson/DEBUG-2532/di branch from 5cb52d8 to 4a218af Compare July 25, 2024 08:29

watson force-pushed the watson/DEBUG-2605/snapshot branch from 60ed8b6 to 8af7e4d Compare July 25, 2024 08:29

watson force-pushed the watson/DEBUG-2532/di branch from 4a218af to 5322061 Compare July 25, 2024 08:37

watson force-pushed the watson/DEBUG-2605/snapshot branch from 8af7e4d to 39fea38 Compare July 25, 2024 08:37

watson force-pushed the watson/DEBUG-2532/di branch from 5322061 to 721af8a Compare July 25, 2024 10:36

watson force-pushed the watson/DEBUG-2605/snapshot branch from 39fea38 to 30f6795 Compare July 25, 2024 10:36

watson force-pushed the watson/DEBUG-2532/di branch from 721af8a to e98c0f8 Compare July 25, 2024 10:37

watson force-pushed the watson/DEBUG-2605/snapshot branch from 30f6795 to c214942 Compare July 25, 2024 10:37

watson force-pushed the watson/DEBUG-2532/di branch from e98c0f8 to 8d71c7c Compare July 25, 2024 10:44

watson force-pushed the watson/DEBUG-2605/snapshot branch from c214942 to d4f1f8a Compare July 25, 2024 10:44

watson force-pushed the watson/DEBUG-2532/di branch from 8d71c7c to 46af3b2 Compare July 25, 2024 11:53

watson force-pushed the watson/DEBUG-2605/snapshot branch from d4f1f8a to b6e69cd Compare July 25, 2024 11:53

watson force-pushed the watson/DEBUG-2532/di branch from 46af3b2 to 605f994 Compare July 26, 2024 08:00

watson force-pushed the watson/DEBUG-2605/snapshot branch from b6e69cd to eb10ac7 Compare July 26, 2024 08:00

watson force-pushed the watson/DEBUG-2532/di branch from 605f994 to 12dde05 Compare July 26, 2024 08:14

watson force-pushed the watson/DEBUG-2605/snapshot branch from eb10ac7 to ed941b7 Compare July 26, 2024 08:14

watson force-pushed the watson/DEBUG-2532/di branch from 12dde05 to 83be4f5 Compare August 19, 2024 09:41

watson force-pushed the watson/DEBUG-2605/snapshot branch from ed941b7 to 92c4a1e Compare August 19, 2024 09:42

watson force-pushed the watson/DEBUG-2532/di branch from 83be4f5 to cf6e059 Compare August 19, 2024 09:44

watson force-pushed the watson/DEBUG-2605/snapshot branch from 92c4a1e to cc2f756 Compare August 19, 2024 09:44

watson force-pushed the watson/DEBUG-2532/di branch from cf6e059 to 1570261 Compare August 19, 2024 09:56

watson force-pushed the watson/DEBUG-2605/snapshot branch from 7af2780 to 002e4ab Compare August 28, 2024 20:10

watson force-pushed the watson/DEBUG-2532/di branch from 22f9718 to b73fba8 Compare August 28, 2024 20:20

watson force-pushed the watson/DEBUG-2605/snapshot branch from 002e4ab to 939de07 Compare August 28, 2024 20:20

watson force-pushed the watson/DEBUG-2532/di branch from b73fba8 to e4bd929 Compare August 28, 2024 20:24

watson force-pushed the watson/DEBUG-2605/snapshot branch from 939de07 to 7dba831 Compare August 28, 2024 20:24

watson force-pushed the watson/DEBUG-2532/di branch from e4bd929 to c1839c7 Compare August 28, 2024 20:42

watson force-pushed the watson/DEBUG-2605/snapshot branch from 7dba831 to 0a06ae4 Compare August 28, 2024 20:42

watson force-pushed the watson/DEBUG-2532/di branch from c1839c7 to 835c9ef Compare August 28, 2024 20:55

watson force-pushed the watson/DEBUG-2605/snapshot branch from 0a06ae4 to 28eab61 Compare August 28, 2024 20:55

watson mentioned this pull request Aug 28, 2024

Allow Remote Config acknowledgements to be async #4638

Merged

watson force-pushed the watson/DEBUG-2532/di branch from 835c9ef to f91b2de Compare August 29, 2024 09:34

watson force-pushed the watson/DEBUG-2605/snapshot branch from 28eab61 to 9733dcf Compare August 29, 2024 09:34

watson force-pushed the watson/DEBUG-2532/di branch 4 times, most recently from a4a8834 to ba9bc32 Compare August 30, 2024 06:07

This was referenced Sep 13, 2024

[DI] Make it easier to debug integration test #4683

Merged

[DI] Improve variable naming #4684

Merged

[DI] DRY up integration test code #4685

Merged

[DI] Simplify integration test by not using async/await #4686

Merged

watson mentioned this pull request Sep 26, 2024

[DI] Switch unit tests to Mocha instead of Tap #4728

Merged

shatzi previously approved these changes Sep 27, 2024

View reviewed changes

watson mentioned this pull request Oct 3, 2024

Added foo property to probe result #4757

Closed

6 tasks

juan-fernandez reviewed Oct 3, 2024

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Comment thread packages/dd-trace/src/debugger/devtools_client/index.js Outdated

juan-fernandez previously approved these changes Oct 3, 2024

View reviewed changes

shatzi previously approved these changes Oct 3, 2024

View reviewed changes

[DI] Add ability to take state snapshot feature

43dd45a

juan-fernandez approved these changes Oct 4, 2024

View reviewed changes

This was referenced Oct 16, 2024

V4.48.0 proposal #4787

Merged

V5.24.0 proposal #4788

Merged

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