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[contracts] Add debug buffer limit + enforcement (#12845)

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* Add debug buffer limit + enforcement

Add debug buffer limit + enforcement

* use BoundedVec for the debug buffer

* revert schedule (debug buf len limit not needed anymore)

* return DispatchError

* addressed review comments
This commit is contained in:
Sasha Gryaznov
2022-12-13 17:54:50 +02:00
committed by GitHub
parent d4633c672f
commit 962580c82e
6 changed files with 86 additions and 30 deletions
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substrate/frame/contracts/src/wasm/runtime.rs
+2 -2
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@@ -2395,11 +2395,11 @@ pub mod env {
str_len: u32,
) -> Result<ReturnCode, TrapReason> {
ctx.charge_gas(RuntimeCosts::DebugMessage)?;
if ctx.ext.append_debug_buffer("") {
if ctx.ext.append_debug_buffer("")? {
let data = ctx.read_sandbox_memory(memory, str_ptr, str_len)?;
let msg =
core::str::from_utf8(&data).map_err(|_| <Error<E::T>>::DebugMessageInvalidUTF8)?;
ctx.ext.append_debug_buffer(msg);
ctx.ext.append_debug_buffer(msg)?;
return Ok(ReturnCode::Success)
}
Ok(ReturnCode::LoggingDisabled)