Use zalloc for processor/message-queue/coordinator

An additional layer which protects us against edge cases with Zeroizing
(objects which don't support it or don't miss it).

Cargo.lock

@@ -7344,6 +7344,7 @@ dependencies = [
  "sp-runtime",
  "tokio",
  "tributary-chain",
+ "zalloc",
  "zeroize",
 ]
 
@@ -7486,6 +7487,7 @@ dependencies = [
  "serai-env",
  "serai-primitives",
  "tokio",
+ "zalloc",
  "zeroize",
 ]
 
@@ -7607,6 +7609,7 @@ dependencies = [
  "sp-application-crypto",
  "thiserror",
  "tokio",
+ "zalloc",
  "zeroize",
 ]
 

coordinator/Cargo.toml

@@ -32,6 +32,7 @@ frost-schnorrkel = { path = "../crypto/schnorrkel" }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["std", "derive"] }
 
+zalloc = { path = "../common/zalloc" }
 serai-db = { path = "../common/db" }
 serai-env = { path = "../common/env" }
 

coordinator/src/main.rs

@@ -63,6 +63,10 @@ use cosign_evaluator::CosignEvaluator;
 #[cfg(test)]
 pub mod tests;
 
+#[global_allocator]
+static ALLOCATOR: zalloc::ZeroizingAlloc<std::alloc::System> =
+  zalloc::ZeroizingAlloc(std::alloc::System);
+
 #[derive(Clone)]
 pub struct ActiveTributary<D: Db, P: P2p> {
   pub spec: TributarySpec,

message-queue/Cargo.toml

@@ -40,6 +40,7 @@ env_logger = { version = "0.10", default-features = false, features = ["humantim
 # Uses a single threaded runtime since this shouldn't ever be CPU-bound
 tokio = { version = "1", default-features = false, features = ["rt", "time", "io-util", "net", "macros"] }
 
+zalloc = { path = "../common/zalloc" }
 serai-db = { path = "../common/db", optional = true }
 
 serai-env = { path = "../common/env" }

message-queue/src/main.rs

@@ -1,6 +1,3 @@
-mod messages;
-mod queue;
-
 pub(crate) use std::{
   sync::{Arc, RwLock},
   collections::HashMap,
@@ -38,6 +35,13 @@ mod clippy {
 }
 pub(crate) use self::clippy::*;
 
+mod messages;
+mod queue;
+
+#[global_allocator]
+static ALLOCATOR: zalloc::ZeroizingAlloc<std::alloc::System> =
+  zalloc::ZeroizingAlloc(std::alloc::System);
+
 // queue RPC method
 /*
   Queues a message to be delivered from a processor to a coordinator, or vice versa.

processor/Cargo.toml

@@ -54,6 +54,7 @@ log = { version = "0.4", default-features = false, features = ["std"] }
 env_logger = { version = "0.10", default-features = false, features = ["humantime"], optional = true }
 tokio = { version = "1", default-features = false, features = ["rt-multi-thread", "sync", "time", "macros"] }
 
+zalloc = { path = "../common/zalloc" }
 serai-db = { path = "../common/db", optional = true }
 serai-env = { path = "../common/env", optional = true }
 # TODO: Replace with direct usage of primitives

processor/src/main.rs

@@ -61,6 +61,10 @@ use multisigs::{MultisigEvent, MultisigManager};
 #[cfg(test)]
 mod tests;
 
+#[global_allocator]
+static ALLOCATOR: zalloc::ZeroizingAlloc<std::alloc::System> =
+  zalloc::ZeroizingAlloc(std::alloc::System);
+
 // Items which are mutably borrowed by Tributary.
 // Any exceptions to this have to be carefully monitored in order to ensure consistency isn't
 // violated.