Drop memory limit. It was useful to debug OOMs but is now unnecessary

diff --git a/src/main.rs b/src/main.rs
index 2dc2f8c327a33fded79f0f54a46de8ee704625fd..d887934d435e847af43d34a9c60c8d50f9d5e881 100644 (file)
--- a/src/main.rs
+++ b/src/main.rs
@@ -41,48 +41,6 @@ static mut TOR_PROXY: Option<SocketAddr> = None;
 pub static START_SHUTDOWN: AtomicBool = AtomicBool::new(false);
 static SCANNING: AtomicBool = AtomicBool::new(false);
 
-
-use std::alloc::{GlobalAlloc, Layout, System};
-use std::ptr;
-use std::sync::atomic::AtomicUsize;
-
-// We keep track of all memory allocated by Rust code, refusing new allocations if it exceeds
-// 1.75GB.
-//
-// Note that while Rust's std, in general, should panic in response to a null allocation, it
-// is totally conceivable that some code will instead dereference this null pointer, which
-// would violate our guarantees that Rust modules should never crash the entire application.
-//
-// In the future, as upstream Rust explores a safer allocation API (eg the Alloc API which
-// returns Results instead of raw pointers, or redefining the GlobalAlloc API to allow
-// panic!()s inside of alloc calls), we should switch to those, however these APIs are
-// currently unstable.
-const TOTAL_MEM_LIMIT_BYTES: usize = (1024 + 756) * 1024 * 1024;
-static TOTAL_MEM_ALLOCD: AtomicUsize = AtomicUsize::new(0);
-struct MemoryLimitingAllocator;
-unsafe impl GlobalAlloc for MemoryLimitingAllocator {
-       unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
-               let len = layout.size();
-               if len > TOTAL_MEM_LIMIT_BYTES {
-                       return ptr::null_mut();
-               }
-               if TOTAL_MEM_ALLOCD.fetch_add(len, Ordering::AcqRel) + len > TOTAL_MEM_LIMIT_BYTES {
-                       TOTAL_MEM_ALLOCD.fetch_sub(len, Ordering::AcqRel);
-                       return ptr::null_mut();
-               }
-               System.alloc(layout)
-       }
-
-       unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
-               System.dealloc(ptr, layout);
-               TOTAL_MEM_ALLOCD.fetch_sub(layout.size(), Ordering::AcqRel);
-       }
-}
-
-#[global_allocator]
-static ALLOC: MemoryLimitingAllocator = MemoryLimitingAllocator;
-
-
 struct PeerState {
        request: Arc<(u64, BlockHash, Block)>,
        pong_nonce: u64,