fvm 4.8.2

Filecoin Virtual Machine reference implementation
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

// Copyright 2021-2023 Protocol Labs
// SPDX-License-Identifier: Apache-2.0, MIT
use crate::kernel::{ClassifyResult, DebugOps, Result};
use crate::syscalls::context::Context;

pub fn log(context: Context<'_, impl DebugOps>, msg_off: u32, msg_len: u32) -> Result<()> {
    // No-op if disabled.
    if !context.kernel.debug_enabled() {
        return Ok(());
    }

    let msg = context.memory.try_slice(msg_off, msg_len)?;
    let msg = String::from_utf8(msg.to_owned()).or_illegal_argument()?;
    context.kernel.log(msg);
    Ok(())
}

pub fn enabled(context: Context<'_, impl DebugOps>) -> Result<i32> {
    Ok(if context.kernel.debug_enabled() {
        0
    } else {
        -1
    })
}

pub fn store_artifact(
    context: Context<'_, impl DebugOps>,
    name_off: u32,
    name_len: u32,
    data_off: u32,
    data_len: u32,
) -> Result<()> {
    // No-op if disabled.
    if !context.kernel.debug_enabled() {
        return Ok(());
    }

    let data = context.memory.try_slice(data_off, data_len)?;
    let name = context.memory.try_slice(name_off, name_len)?;
    let name =
        std::str::from_utf8(name).or_error(fvm_shared::error::ErrorNumber::IllegalArgument)?;

    context.kernel.store_artifact(name, data)?;

    Ok(())
}