ok Jakob, thanks for clarification. if we --no-extensible_ro_snapshot do
this, will it have a any performance impact.
On Tue, Jun 3, 2025 at 4:01 PM Jakob Gruber <jgru...@chromium.org> wrote:
>
>
> 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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