fuzzers: Use mimalloc and scudo in QEMU fuzzers

Author: langston-barrett

fuzzers/binary_only/fuzzbench_fork_qemu/Cargo.lock

@@ -34,3 +34,5 @@ libafl_targets = { path = "../../../crates/libafl_targets" }
 log = { version = "0.4.22", features = ["release_max_level_info"] }
 clap = { version = "4.5.18", features = ["default"] }
 env_logger = "0.11.7"
+mimalloc = "0.1.48"
+scudo = "0.1.3"

fuzzers/binary_only/fuzzbench_fork_qemu/Cargo.toml

@@ -59,6 +59,14 @@ use libafl_qemu::{
 };
 use libafl_targets::{CMPLOG_MAP_PTR, EDGES_MAP_DEFAULT_SIZE};
 
+#[cfg(all(not(miri), debug_assertions))]
+#[global_allocator]
+static GLOBAL: scudo::GlobalScudoAllocator = scudo::GlobalScudoAllocator;
+
+#[cfg(all(not(miri), not(debug_assertions)))]
+#[global_allocator]
+static GLOBAL: mimalloc::MiMalloc = mimalloc::MiMalloc;
+
 /// The fuzzer main
 pub fn main() {
     // Registry the metadata types used in this fuzzer