go --> wasm: syscall.Mmap
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Stan Srednyak
Feb 17, 2023, 9:47:10 AM2/17/23
to golang-nuts
I have a Go code that I am trying to compile to .wasm. The code uses syscall.Mmap.
I am getting undefined: syscall.Mmap
I am getting undefined: syscall.Mmap
What is this error and what do I do with it?
Stan Srednyak
Ian Lance Taylor
Feb 17, 2023, 11:14:43 AM2/17/23
to Stan Srednyak, golang-nuts
The syscall package provides system dependent functionality. Wasm does not support memory mapping, so syscall.Mmap does not exist on Wasm.
In order to make any useful suggestions we would have to know why your Go code is calling Mmap.
Ian
Stan Srednyak
Feb 17, 2023, 12:12:05 PM2/17/23
to Ian Lance Taylor, golang-nuts
hi Ian,
thanks for your reply.
The Mmap functionality is crucial for my app. I am dealing with large binary trees that do not fit RAM. I implemented them on disk, and for this, Mmap is crucial.
Now I have a client that wants to run the app from inside a virtual box, and for security reason, they want .wasm code.
thanks for your reply.
The Mmap functionality is crucial for my app. I am dealing with large binary trees that do not fit RAM. I implemented them on disk, and for this, Mmap is crucial.
Now I have a client that wants to run the app from inside a virtual box, and for security reason, they want .wasm code.
Stan Srednyak
Ian Lance Taylor
Feb 17, 2023, 3:37:19 PM2/17/23
to Stan Srednyak, golang-nuts
On Fri, Feb 17, 2023 at 9:11 AM Stan Srednyak <stan....@gmail.com> wrote:
>
> thanks for your reply.
> The Mmap functionality is crucial for my app. I am dealing with large binary trees that do not fit RAM. I implemented them on disk, and for this, Mmap is crucial.
>
> Now I have a client that wants to run the app from inside a virtual box, and for security reason, they want .wasm code.
Sorry, I have no idea whether this is possible using wasm. I suspect
>
> thanks for your reply.
> The Mmap functionality is crucial for my app. I am dealing with large binary trees that do not fit RAM. I implemented them on disk, and for this, Mmap is crucial.
>
> Now I have a client that wants to run the app from inside a virtual box, and for security reason, they want .wasm code.
that it is not but I am not an expert.
Ian
Robert Engels
Feb 17, 2023, 3:45:15 PM2/17/23
to Ian Lance Taylor, Stan Srednyak, golang-nuts
You must like need to use WASI - but it doesn’t support mmap :(
> On Feb 17, 2023, at 2:37 PM, Ian Lance Taylor <ia...@golang.org> wrote:
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> On Feb 17, 2023, at 2:37 PM, Ian Lance Taylor <ia...@golang.org> wrote:
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Robert Engels
Feb 17, 2023, 3:46:16 PM2/17/23
to Ian Lance Taylor, Stan Srednyak, golang-nuts
On Feb 17, 2023, at 2:44 PM, Robert Engels <ren...@ix.netcom.com> wrote:
You must like need to use WASI - but it doesn’t support mmap :(
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