On Tue, Jun 3, 2025 at 12:17 PM Subash <subash2826...@gmail.com> wrote:
> Hi Jakob Grube,
>
> I am not reusing isolate. Each js execution happens in its own
> isolate. But I have a threadpool that will reuse the thread. Means the same
> thread may create another isolate after it gets a chance again.
> I load the snapshot bytes into char* array. Each create the isolate i
> will copy the bytes and feed to startup data in CreateParams.
>
With default settings, all Isolates within the same process will reuse
certain resources. Perhaps most importantly, ReadOnlySpace is reused. This
is why all snapshots used within the same process must have compatible RO
space layout.
>
> I am creating a snapshot using
> SnapshotCreator::CreateBlob(FunctionCodeHandling::kKeep).
>
> I will check with --no-extensible_ro_snapshot
>
> flags.append(" --no-extensible_ro_snapshot");
> v8::V8::SetFlagsFromString(flags.c_str());
>
> I am disabled like this.
>
>
>
>
> On Tue, Jun 3, 2025 at 1:01 PM Jakob Gruber <jgru...@chromium.org> wrote:
>
>>
>>
>> On Tue, Jun 3, 2025 at 8:29 AM Subash Durairaj <subash2826...@gmail.com>
>> wrote:
>>
>>>
>>> /lib/x86_64-linux-gnu/libc.so.6(+0x3bd60)[0x7fe7781b6d60]
>>>
>>> v8::internal::StringTableInsertionKeyC2EPNS0_7IsolateENS0_6HandleINS0_6StringEEENS0_27DeserializingUserCodeOptionE+0x1c)[0x55b7ef4e844c]
>>>
>>> v8::internal::StringTable::InsertForIsolateDeserializationIsolateERKSt6vectorINS0_6HandleINS0_6StringEEESaIS7_EE+0x74)[0x55b7ef416e14]
>>>
>>> v8::internal::SharedHeapDeserializer::DeserializeStringTableEv+0x93)[0x55b7ef4f80f3]
>>>
>>> v8::internal::SharedHeapDeserializer::DeserializeIntoIsolateEv+0x68)[0x55b7ef4f8448]
>>> v8::internal::Isolate::Init::SnapshotDataES3_S3_b+0xd0d)[0x55b7ef12e00d]
>>> v8::internal::Snapshot::InitializeEPNS0_7IsolateE+0x189)[0x55b7ef4f94b9]
>>> v8::Isolate::Initialize::CreateParamsE+0x193)[0x55b7ef08d243]
>>> v8::Isolate::New::CreateParamsE+0x22)[0x55b7ef08d532]
>>>
>>>
>>> Hi Team, i am getting this crash when creating a new isolate.
>>>
>>> i am embedded v8 and running as a server to provide js execution.
>>> i ran maximum of 100 isolates in parallel with two different snapshot.
>>> each execution choose any one of snapshot
>>>
>>
>> We've seen problems related to using different snapshots within the same
>> Isolate before. To rule this out, please try disabling the
>> `extensible_ro_snapshot` when building the snapshot, either by using the gn
>> flag:
>>
>> v8_enable_extensible_ro_snapshot=false
>>
>> or the runtime flag:
>>
>> --no-extensible_ro_snapshot
>>
>> Otherwise, we'll need more information about the crash.
>>
>>
>>>
>>> i am getting this crash randomly. wondering how to fix this
>>>
>>> Please give me the direction to fix this.
>>>
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>>> .
>>>
>>
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