I'm working on code to take a snapshot of v8 isolate and context and while
I have ogtten snapshotting working with function templates, I'm running
into a problem with tryingt otest snapshotting a js object wrapped with a
cpp class.
When i snapshot the object seems to be getting CGed as the wek ref callback
gets called and thus the object is deleted and the serializer function is
never called for it.
Not sure how to keep the obj alive for the snapshot the test js code is
test('test');
test2('test2');
let snapObj = new TestSnapObject();
snapObj.value = 100;
The object does get created and i can se the value change from the cpp side.
How would i need to keep it alive so it gets snapshotted.
Another question if i hold a global the context in a class should i have to
cleat it for snapshotting? I have tried to hold but get an error where as
if i clear it will snapshot ok.
When I hold i get this error
global handle not serialized: 0x1248082824cd: [NativeContext] in OldSpace
- map: 0x1248082824a5 <Map(NATIVE_CONTEXT_TYPE)>
- type: NATIVE_CONTEXT_TYPE
- scope_info: 0x1248080061d5 <ScopeInfo SCRIPT_SCOPE>
- previous: 0
- native_context: 0x1248082824cd <NativeContext[287]>
- extension: 0x1248082936d1 <JSGlobalObject>
- length: 287
- elements:
0: 0x1248080061d5 <ScopeInfo SCRIPT_SCOPE>
1: 0
2: 0x1248082936d1 <JSGlobalObject>
3: 0x124808282471 <JSGlobalProxy>
4: 0x12480820f2a5 <Other heap object (EMBEDDER_DATA_ARRAY_TYPE)>
5: 0x124808000069 <undefined>
6: 0x12480828d929 <JSFunction next (sfi = 0x1248080f4a31)>
7: 0x12480828d945 <JSFunction next (sfi = 0x1248080f4a5d)>
8: 0x12480828b099 <JSFunction apply (sfi = 0x1248080fa93d)>
9: 0x12480828af49 <JSFunction construct (sfi = 0x1248080fa969)>
10: 0x12480828a065 <JSFunction then (sfi = 0x1248080f7161)>
11: 0x124808282ce9 <JSFunction apply (sfi = 0x1248080f51c1)>
12: 0x124808284519 <JSFunction Uint8Array (sfi = 0x1248080f9c2d)>
13: 0x124808284685 <JSFunction Int8Array (sfi = 0x1248080f9c59)>
14: 0x124808289771 <JSFunction Uint16Array (sfi = 0x1248080f9c85)>
15: 0x12480828ad1d <JSFunction Int16Array (sfi = 0x1248080f9cb1)>
16: 0x12480828a2d9 <JSFunction Uint32Array (sfi = 0x1248080f9cdd)>
17: 0x1248082851e1 <JSFunction Int32Array (sfi = 0x1248080f9d09)>
18: 0x1248082898dd <JSFunction Float32Array (sfi =
0x1248080f9d35)>
19: 0x12480828abb1 <JSFunction Float64Array (sfi =
0x1248080f9d61)>
20: 0x1248082843ad <JSFunction Uint8ClampedArray (sfi =
0x1248080f9d8d)>
21: 0x124808284aa1 <JSFunction BigUint64Array (sfi =
0x1248080f9db9)>
22: 0x12480828aa45 <JSFunction BigInt64Array (sfi =
0x1248080f9de5)>
23: 0x124808000069 <undefined>
24: 0x12480828d961 <Map[72](RAB_GSAB_UINT8ELEMENTS)>
25: 0x12480828d989 <Map[72](RAB_GSAB_INT8ELEMENTS)>
26: 0x12480828d9b1 <Map[72](RAB_GSAB_UINT16ELEMENTS)>
27: 0x12480828d9d9 <Map[72](RAB_GSAB_INT16ELEMENTS)>
28: 0x12480828da01 <Map[72](RAB_GSAB_UINT32ELEMENTS)>
29: 0x12480828da29 <Map[72](RAB_GSAB_INT32ELEMENTS)>
30: 0x12480828da51 <Map[72](RAB_GSAB_FLOAT32ELEMENTS)>
31: 0x12480828da79 <Map[72](RAB_GSAB_FLOAT64ELEMENTS)>
32: 0x12480828daa1 <Map[72](RAB_GSAB_UINT8_CLAMPEDELEMENTS)>
33: 0x12480828dac9 <Map[72](RAB_GSAB_BIGUINT64ELEMENTS)>
34: 0x12480828daf1 <Map[72](RAB_GSAB_BIGINT64ELEMENTS)>
35: 0x124808000069 <undefined>
36: 0x12480828db19 <Map[28](HOLEY_ELEMENTS)>
37: 0x124808000069 <undefined>
38: 0x12480828a861 <JSFunction ArrayBuffer (sfi = 0x1248080f9185)>
39: 0x12480828a8b1 <Map[68](HOLEY_ELEMENTS)>
40: 0x12480828db81 <JSFunction
arrayBufferConstructor_DoNotInitialize (sfi = 0x1248080f9261)>
41: 0x12480828ce75 <JSFunction Array (sfi = 0x1248080f529d)>
42-43: 0x124808000069 <undefined>
44: 0x12480828db9d <Map[20](HOLEY_ELEMENTS)>
45: 0x12480828dd81 <JSFunction AsyncFunction (sfi =
0x1248080fad31)>
46: 0x12480828de8d <Map[44](HOLEY_ELEMENTS)>
47: 0x12480828df1d <JSFunction AsyncGeneratorFunction (sfi =
0x1248080facad)>
48: 0x124808284c19 <JSFunction BigInt (sfi = 0x1248080fa441)>
49: 0x1248082888c5 <JSFunction Boolean (sfi = 0x1248080f5c69)>
50: 0x12480828e139 <Map[24](HOLEY_ELEMENTS)>
51: 0x12480828e189 <Map[24](HOLEY_ELEMENTS)>
52: 0x12480828e1d9 <JSFunction (sfi = 0x1248080fac55)>
53: 0x12480828e1f5 <JSFunction (sfi = 0x1248080fac29)>
54: 0x12480828e211 <JSFunction CallSite (sfi = 0x1248080fad5d)>
55: 0x12480828e6a1 <JSFunction (sfi = 0x12480820df21)>
56: 0x12480828e765 <Map[28](HOLEY_ELEMENTS)>
57: 0x124808288171 <JSFunction DataView (sfi = 0x1248080f9e11)>
58: 0x124808288db9 <JSFunction Date (sfi = 0x1248080f6769)>
59: 0x124808000069 <undefined>
60: 0x124808282b4d <JSFunction (sfi = 0x124808209569)>
61-62: 0x124808000069 <undefined>
63: 0
64: 0x12480828e829 <Object map = 0x12480828e7cd>
65: 0x12480828e87d <Map[20](FAST_SLOPPY_ARGUMENTS_ELEMENTS)>
66: 0x12480828e955 <FixedArray[1024]>
67: 0x124808282bf1 <JSFunction Function (sfi = 0x1248080f5195)>
68: 0x124808282b4d <JSFunction (sfi = 0x124808209569)>
69: 0x1248082902b9 <JSFunction GeneratorFunction (sfi =
0x1248080fac81)>
70: 0x12480829056d <Map[12](HOLEY_ELEMENTS)>
71: 0x124808290595 <Map[12](HOLEY_ELEMENTS)>
72: 0x1248082905bd <Map[24](HOLEY_ELEMENTS)>
73: 0x124808290651 <Object map = 0x1248082905e5>
74: 0x12480828d17d <JSArray[0]>
75: 0x124808285471 <Object map = 0x1248082853ed>
76: 0x1248082904b5 <Object map = 0x1248082903a9>
77: 0x12480828dc31 <Object map = 0x12480828dbed>
78: 0x12480828e081 <Object map = 0x12480828e00d>
79: 0x124808290431 <Object map = 0x1248082903d1>
80: 0x124808290715 <Object map = 0x1248082906a9>
81: 0x124808284ecd <Map[28](HOLEY_ELEMENTS)>
82: 0x12480828336d <Object map = 0x1248082829a9>
83: 0x1248082907b9 <Object map = 0x12480829074d>
84: 0x124808287fe9 <Object map = 0x124808287edd>
85: 0x124808287edd <Map[28](HOLEY_ELEMENTS)>
86: 0x1248082907f1 <Map[20](HOLEY_ELEMENTS)>
87: 0x124808290885 <Object map = 0x124808290819>
88: 0x124808287755 <Object map = 0x1248082874a1 value =
0x1248080000a1 <String[0]: #>>
89: 0x124808287209 <Map[28](HOLEY_ELEMENTS)>
90: 0x124808284905 <Map[28](HOLEY_ELEMENTS)>
91: 0x12480828b4b5 <JSFunction Collator (sfi = 0x1248080f8761)>
92: 0x12480828c825 <JSFunction DateTimeFormat (sfi =
0x1248080f84f9)>
93: 0x12480828c465 <JSFunction DisplayNames (sfi =
0x1248080f8fa1)>
94: 0x124808000069 <undefined>
95: 0x12480828b259 <JSFunction NumberFormat (sfi =
0x1248080f862d)>
96: 0x12480828bf0d <JSFunction Locale (sfi = 0x1248080f8c05)>
97: 0x12480828bd19 <JSFunction ListFormat (sfi = 0x1248080f8b29)>
98: 0x12480828b919 <JSFunction PluralRules (sfi = 0x1248080f8971)>
99: 0x12480828bb19 <JSFunction RelativeTimeFormat (sfi =
0x1248080f8a4d)>
100: 0x12480828c629 <JSFunction Segmenter (sfi = 0x1248080f9051)>
101: 0x1248082908dd <Map[28](HOLEY_ELEMENTS)>
102: 0x1248082909e5 <Map[28](HOLEY_ELEMENTS)>
103-109: 0x124808000069 <undefined>
110: 0x124808290ad1 <Map[20](HOLEY_ELEMENTS)>
111: 0x12480828cf09 <Map[16](PACKED_SMI_ELEMENTS)>
112: 0x12480828d7c9 <Map[16](HOLEY_SMI_ELEMENTS)>
113: 0x12480828d889 <Map[16](PACKED_ELEMENTS)>
114: 0x12480828d8c9 <Map[16](HOLEY_ELEMENTS)>
115: 0x12480828d809 <Map[16](PACKED_DOUBLE_ELEMENTS)>
116: 0x12480828d849 <Map[16](HOLEY_DOUBLE_ELEMENTS)>
117: 0x124808290b71 <Map[28](PACKED_FROZEN_ELEMENTS)>
118: 0x124808284e71 <JSFunction Map (sfi = 0x1248080fa231)>
119: 0x124808284ea5 <Map[16](HOLEY_ELEMENTS)>
120: 0x124808290bd9 <Map[20](HOLEY_ELEMENTS)>
121: 0x124808000069 <undefined>
122: 0x124808287e81 <JSFunction Set (sfi = 0x1248080fa549)>
123: 0x124808287eb5 <Map[16](HOLEY_ELEMENTS)>
124: 0x1248082871ad <JSFunction WeakMap (sfi = 0x1248080fa701)>
125: 0x1248082848a9 <JSFunction WeakSet (sfi = 0x1248080fa7dd)>
126: 0x12480828870d <JSFunction WeakRef (sfi = 0x1248080fabd1)>
127: 0x12480828cab9 <JSFunction FinalizationRegistry (sfi =
0x1248080fab21)>
128-137: 0x124808000069 <undefined>
138: 0x1248082847d9 <Object map = 0x12480828477d>
139-142: 0x124808000069 <undefined>
143: 0x12480828247d <MetaMap (0x1248082824cd <NativeContext[287]>)>
144: 0x124808290c1d <Map(FUNCTION_CONTEXT_TYPE)>
145: 0x124808290c45 <Map(MODULE_CONTEXT_TYPE)>
146: 0x124808290c6d <Map(EVAL_CONTEXT_TYPE)>
147: 0x124808290c95 <Map(SCRIPT_CONTEXT_TYPE)>
148: 0x124808290cbd <Map(AWAIT_CONTEXT_TYPE)>
149: 0x124808290ce5 <Map(BLOCK_CONTEXT_TYPE)>
150: 0x124808290d0d <Map(CATCH_CONTEXT_TYPE)>
151: 0x124808290d35 <Map(WITH_CONTEXT_TYPE)>
152: 0x124808290d5d <Map(DEBUG_EVALUATE_CONTEXT_TYPE)>
153: 0x124808290d85 <Map[60](HOLEY_ELEMENTS)>
154: 0x124808290dad <Other heap object (WEAK_FIXED_ARRAY_TYPE)>
155: 0x124808290fb5 <Map[20](HOLEY_ELEMENTS)>
156: 0x124808290ffd <Map[20](HOLEY_ELEMENTS)>
157: 0x124808291025 <Map[20](HOLEY_ELEMENTS)>
158: 0
159: 0x12480829104d <ByteArray[16]>
160: 0x124808291065 <FixedDoubleArray[64]>
161: 0x12480829126d <Other heap object (WEAK_FIXED_ARRAY_TYPE)>
162: 0x12480828a511 <JSFunction Number (sfi = 0x1248080f5a2d)>
163: 0x124808282eb1 <JSFunction Object (sfi = 0x1248080f4955)>
164: 0x12480828336d <Object map = 0x1248082829a9>
165: 0x1248082829a9 <Map[28](HOLEY_ELEMENTS)>
166-169: 0x124808000069 <undefined>
170: 0x124808291375 <Map[16](JS_PROXY_TYPE)>
171: 0x12480829139d <Map[16](JS_PROXY_TYPE)>
172: 0x124808289a45 <JSFunction Proxy (sfi = 0x1248080fa88d)>
173: 0x1248082913c5 <Map[16](JS_PROXY_TYPE)>
174: 0x1248082913ed <Map[20](HOLEY_ELEMENTS)>
175: 0x12480828a019 <Object map = 0x124808289f89>
176: 0x124808000069 <undefined>
177: 0x124808286ec1 <JSFunction exec (sfi = 0x1248080f7211)>
178: 0x124808286ae1 <JSFunction RegExp (sfi = 0x1248080f71e5)>
179: 0x12480829143d <Other heap object (REG_EXP_MATCH_INFO_TYPE)>
180: 0x124808286e51 <JSFunction [Symbol.matchAll] (sfi =
0x1248080f7479)>
181: 0x124808286e35 <JSFunction [Symbol.match] (sfi =
0x1248080f744d)>
182: 0x124808286ddd <Object map = 0x124808286b3d>
183: 0x124808286b3d <Map[28](HOLEY_ELEMENTS)>
184: 0x124808286e6d <JSFunction [Symbol.replace] (sfi =
0x1248080f74a5)>
185: 0x124808291469 <Map[40](HOLEY_ELEMENTS)>
186: 0x1248082914f5 <Map[44](HOLEY_ELEMENTS)>
187: 0x12480829158d <Map[20](HOLEY_ELEMENTS)>
188: 0x124808286e89 <JSFunction [Symbol.search] (sfi =
0x1248080f74d1)>
189: 0x124808286ea5 <JSFunction [Symbol.split] (sfi =
0x1248080f74fd)>
190: 0x1248082915dd <Map[24](HOLEY_ELEMENTS)>
191: 0x1248082916c9 <ScriptContextTable[16]>
192: 0x124808000069 <undefined>
193: 0x12480820f2b5 <String[36]:
"d34eb7dc-8045-4301-930f-0cc982e1753e">
194: 0x1248080006fd <FixedArray[0]>
195: 0x124808291851 <Map[20](HOLEY_ELEMENTS)>
196: 0x124808291899 <Map[20](HOLEY_ELEMENTS)>
197: 0x12480829195d <JSFunction SharedArrayBuffer (sfi =
0x1248080f928d)>
198: 0x12480828e8c5 <Map[20](PACKED_ELEMENTS)>
199: 0x124808291a9d <Map[20](SLOW_SLOPPY_ARGUMENTS_ELEMENTS)>
200: 0x124808291af9 <Map[16](PACKED_ELEMENTS)>
201: 0x124808291b61 <Map[12](HOLEY_ELEMENTS)>
202: 0x124808291b89 <Map[12](HOLEY_ELEMENTS)>
203: 0x124808291bb1 <SimpleNumberDictionary[1027]>
204: 0x124808292bc5 <OrderedHashSet[13]>
205: 0x1248080006fd <FixedArray[0]>
206: 0x124808292c01 <PropertyCell name=0x1248080000a1 <String[0]:
#> value=1>
207: 0x124808282c25 <Map[32](HOLEY_ELEMENTS)>
208: 0x124808292c15 <Map[36](HOLEY_ELEMENTS)>
209: 0x124808292c89 <Map[28](HOLEY_ELEMENTS)>
210: 0x12480828fb49 <Map[32](HOLEY_ELEMENTS)>
211: 0x124808283505 <Map[32](HOLEY_ELEMENTS)>
212: 0x124808292cf1 <Map[36](HOLEY_ELEMENTS)>
213: 0x12480828328d <Map[32](HOLEY_ELEMENTS)>
214: 0x124808282c99 <Map[28](HOLEY_ELEMENTS)>
215: 0x124808292d4d <Map[32](HOLEY_ELEMENTS)>
216: 0x12480828ddb5 <Map[28](HOLEY_ELEMENTS)>
217: 0x124808292d9d <Map[32](HOLEY_ELEMENTS)>
218: 0x1248082902ed <Map[32](HOLEY_ELEMENTS)>
219: 0x124808292ded <Map[36](HOLEY_ELEMENTS)>
220: 0x12480828df51 <Map[32](HOLEY_ELEMENTS)>
221: 0x124808292e49 <Map[36](HOLEY_ELEMENTS)>
222: 0x124808292ea5 <Map[32](HOLEY_ELEMENTS)>
223: 0x1248082873e5 <JSFunction String (sfi = 0x1248080f5ced)>
224: 0x1248082874a1 <Map[16](FAST_STRING_WRAPPER_ELEMENTS)>
225: 0x1248082838f9 <JSFunction Symbol (sfi = 0x1248080f6635)>
226: 0
227: 0x124808293161 <WebAssembly map = 0x124808292ef5>
228: 0x124808292c89 <Map[28](HOLEY_ELEMENTS)>
229: 0x124808290071 <JSFunction Tag (sfi = 0x12480820e9f5)>
230: 0x124808290125 <JSFunction Exception (sfi = 0x12480820eabd)>
231: 0x12480828ff45 <JSFunction Global (sfi = 0x12480820e7f1)>
232: 0x12480828fbd9 <JSFunction Instance (sfi = 0x12480820e2b5)>
233: 0x1248082931b1 <Tag map = 0x124808290091>
234: 0x12480828fe35 <JSFunction Memory (sfi = 0x12480820e655)>
235: 0x12480828fa49 <JSFunction Module (sfi = 0x12480820e1e9)>
236: 0x12480828fcc1 <JSFunction Table (sfi = 0x12480820e3e9)>
237-238: 0x124808000069 <undefined>
239: 0x124808283be9 <JSFunction TypedArray (sfi = 0x1248080f9579)>
240: 0x124808283f61 <Object map = 0x124808283c7d>
241: 0x12480828d489 <JSFunction entries (sfi = 0x1248080f5715)>
242: 0x12480828d4c1 <JSFunction forEach (sfi = 0x1248080f576d)>
243: 0x12480828d46d <JSFunction keys (sfi = 0x1248080f56e9)>
244: 0x12480828d4a5 <JSFunction values (sfi = 0x1248080f5741)>
245: 0x124808285375 <JSFunction Error (sfi = 0x1248080f7c09)>
246: 0x12480828548d <JSFunction toString (sfi = 0x1248080f7c61)>
247: 0x124808288bf5 <JSFunction EvalError (sfi = 0x1248080f7cb9)>
248: 0x124808286fdd <JSFunction AggregateError (sfi =
0x1248080f7c8d)>
249: 0x124808289aa5 <JSFunction eval (sfi = 0x1248080fb259)>
250: 0x124808286411 <JSFunction parseFloat (sfi = 0x1248080f5c11)>
251: 0x12480828882d <JSFunction parseInt (sfi = 0x1248080f5c3d)>
252: 0x124808293735 <JSFunction (sfi = 0x124808293709)>
253: 0x124808285049 <JSFunction delete (sfi = 0x1248080fa2e1)>
254: 0x1248082850f1 <JSFunction get (sfi = 0x1248080fa25d)>
255: 0x12480828502d <JSFunction has (sfi = 0x1248080fa2b5)>
256: 0x12480828510d <JSFunction set (sfi = 0x1248080fa289)>
257: 0x1248082935f1 <JSFunction cleanupSome (sfi = 0x1248080faba5)>
258: 0x124808282d59 <JSFunction [Symbol.hasInstance] (sfi =
0x1248080f5271)>
259: 0x124808282d3d <JSFunction toString (sfi = 0x1248080f5245)>
260: 0x124808283425 <JSFunction toString (sfi = 0x1248080f50b9)>
261: 0x124808283441 <JSFunction valueOf (sfi = 0x1248080f50e5)>
262: 0x124808289eb9 <JSFunction all (sfi = 0x1248080f7059)>
263: 0x124808289ed5 <JSFunction allSettled (sfi = 0x1248080f7085)>
264: 0x124808289ef1 <JSFunction any (sfi = 0x1248080f70b1)>
265: 0x124808289e6d <JSFunction Promise (sfi = 0x1248080f7001)>
266: 0x12480828a12d <JSFunction RangeError (sfi = 0x1248080f7ce5)>
267: 0x124808288a55 <JSFunction ReferenceError (sfi =
0x1248080f7d11)>
268: 0x1248082880d9 <JSFunction add (sfi = 0x1248080fa5a1)>
269: 0x124808288031 <JSFunction delete (sfi = 0x1248080fa5cd)>
270: 0x1248082880bd <JSFunction has (sfi = 0x1248080fa575)>
271-272: 0x124808000069 <undefined>
273: 0x12480828cc7d <JSFunction SyntaxError (sfi = 0x1248080f7d3d)>
274: 0x124808285bdd <JSFunction TypeError (sfi = 0x1248080f7d69)>
275: 0x12480828551d <JSFunction URIError (sfi = 0x1248080f7d95)>
276: 0x1248082931dd <JSFunction CompileError (sfi =
0x1248080f7dc1)>
277: 0x124808293301 <JSFunction LinkError (sfi = 0x1248080f7ded)>
278: 0x124808293425 <JSFunction RuntimeError (sfi =
0x1248080f7e19)>
279: 0x124808287329 <JSFunction set (sfi = 0x1248080fa785)>
280: 0x12480828730d <JSFunction get (sfi = 0x1248080fa759)>
281: 0x1248082872f1 <JSFunction delete (sfi = 0x1248080fa72d)>
282: 0x1248082849fd <JSFunction add (sfi = 0x1248080fa861)>
283: 0x124808000069 <undefined>
284: 0x12480800070d <Other heap object (WEAK_ARRAY_LIST_TYPE)>
285-286: 0x124808000069 <undefined>
- microtask_queue: 0x138005990
global handle not serialized: 0x12480820f2fd: [[api object] 0] in OldSpace
- map: 0x124808294315 <Map[28](HOLEY_ELEMENTS)> [FastProperties]
- prototype: 0x12480820f171 <Object map = 0x124808294381>
- elements: 0x1248080006fd <FixedArray[0]> [HOLEY_ELEMENTS]
- embedder fields: 2
- properties: 0x1248080006fd <FixedArray[0]>
- All own properties (excluding elements): {
0x124808000ddd: [String] in ReadOnlySpace: #value: 0x124808294309
<AccessorPair> (const accessor descriptor), location: descriptor
}
- embedder fields = {
45850764, aligned pointer: 0x105774118
469786088, aligned pointer: 0x13800bbd0
}
Thanks for any pointers
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