V8_COMPRESS_POINTERS flag

[theratliter theratliter]

Hi, i compile V8(10.8) with -DV8_COMPRESS_POINTERS, but when i run the code it crashes with the error as follows.

```

Embedder-vs-V8 build configuration mismatch. On embedder side sandbox is DISABLED while on V8 side it's ENABLED.

```

Does anybody know why ? thanks!

[Ben Noordhuis]

Compile your own code with -DV8_COMPRESS_POINTERS to fix that.

Pointer compression changes the layout of objects in memory. Embedder
and engine have to agree on the object layout, otherwise things go
boom.

[theratliter theratliter]

Oh, sorry, i mean i compile my code with  -DV8_COMPRESS_POINTERS and compile V8 with default config, but it still crash. I encountered this error long time ago and it can be fixed with  -DV8_COMPRESS_POINTERS, but it does not work in V8 10.8. I print the value of V8_COMPRESS_POINTERS, it shows 1. it maybe related to my PC or compiler ?

[Daryl Haresign]

You need -DV8_ENABLE_SANDBOX.

You can look at the BUILD.gn file to figure out how the default values look.

There’s an option you can enable when you build v8 so that it spits out a v8-gn.h that you can include to ensure you have the correct defines when you build the embedder side code.

On Oct 2, 2022, at 14:39, theratliter theratliter <thera...@gmail.com> wrote:

Oh, sorry, i mean i compile my code with  -DV8_COMPRESS_POINTERS and compile V8 with default config, but it still crash. I encountered this error long time ago and it can be fixed with  -DV8_COMPRESS_POINTERS, but it does not work in V8 10.8. I print the value of V8_COMPRESS_POINTERS, it shows 1. it maybe related to my PC or compiler ?

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[theratliter theratliter]

Thanks ! it works :-).