Slightly increase thread stack size for safety (primary Alpine related) possibly GitHub #443

node/Constants.hpp

@@ -419,6 +419,11 @@
 #define ZT_UDP_DESIRED_BUF_SIZE 131072
 #endif
 
+/**
+ * Desired / recommended min stack size for threads (used on some platforms to reset thread stack size)
+ */
+#define ZT_THREAD_MIN_STACK_SIZE 1048576
+
 /* Ethernet frame types that might be relevant to us */
 #define ZT_ETHERTYPE_IPV4 0x0800
 #define ZT_ETHERTYPE_ARP 0x0806

osdep/Thread.hpp

@@ -28,6 +28,7 @@
 #include <WinSock2.h>
 #include <Windows.h>
 #include <string.h>
+
 #include "../node/Mutex.hpp"
 
 namespace ZeroTier {
@@ -128,7 +129,7 @@ public:
 		pthread_attr_init(&_tattr);
 		// This corrects for systems with abnormally small defaults (musl) and also
 		// shrinks the stack on systems with large defaults to save a bit of memory.
-		pthread_attr_setstacksize(&_tattr,524288);
+		pthread_attr_setstacksize(&_tattr,ZT_THREAD_MIN_STACK_SIZE);
 		_started = false;
 	}