Merge pull request #12 from fireice-uk/topic-large-pages-win

Fix large pages on Windows and make them more user-friendly

2 files changed, 91 insertions, 5 deletions

diff --git a/xmrstak/backend/backendConnector.cpp b/xmrstak/backend/backendConnector.cpp
index 6106267..28ba1ac 100644
--- a/xmrstak/backend/backendConnector.cpp
+++ b/xmrstak/backend/backendConnector.cpp
@@ -52,8 +52,7 @@ namespace xmrstak
 
 bool BackendConnector::self_test()
 {
-	
-	return true;
+	return cpu::minethd::self_test();
 }
 
 std::vector<iBackend*>* BackendConnector::thread_starter(miner_work& pWork)
diff --git a/xmrstak/backend/cpu/crypto/cryptonight_common.cpp b/xmrstak/backend/cpu/crypto/cryptonight_common.cpp
index 9d03ed7..0690415 100644
--- a/xmrstak/backend/cpu/crypto/cryptonight_common.cpp
+++ b/xmrstak/backend/cpu/crypto/cryptonight_common.cpp
@@ -45,6 +45,7 @@ extern "C"
 
 #ifdef _WIN32
 #include <windows.h>
+#include <ntsecapi.h>
 #else
 #include <sys/mman.h>
 #include <errno.h>
@@ -70,6 +71,8 @@ void do_skein_hash(const void* input, size_t len, char* output) {
 void (* const extra_hashes[4])(const void *, size_t, char *) = {do_blake_hash, do_groestl_hash, do_jh_hash, do_skein_hash};
 
 #ifdef _WIN32
+BOOL bRebootDesirable = FALSE; //If VirtualAlloc fails, suggest a reboot
+
 BOOL AddPrivilege(TCHAR* pszPrivilege)
 {
 	HANDLE           hToken;
@@ -92,16 +95,97 @@ BOOL AddPrivilege(TCHAR* pszPrivilege)
 	CloseHandle(hToken);
 	return TRUE;
 }
+
+BOOL AddLargePageRights()
+{
+	HANDLE hToken;
+	PTOKEN_USER user = NULL;
+
+	if (OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &hToken) == TRUE)
+	{
+		TOKEN_ELEVATION Elevation;
+		DWORD cbSize = sizeof(TOKEN_ELEVATION);
+		BOOL bIsElevated = FALSE;
+
+		if (GetTokenInformation(hToken, TokenElevation, &Elevation, sizeof(Elevation), &cbSize))
+			bIsElevated = Elevation.TokenIsElevated;
+
+		DWORD size = 0;
+		GetTokenInformation(hToken, TokenUser, NULL, 0, &size);
+		
+		if (size > 0 && bIsElevated)
+		{
+			user = (PTOKEN_USER)LocalAlloc(LPTR, size);
+			GetTokenInformation(hToken, TokenUser, user, size, &size);
+		}
+
+		CloseHandle(hToken);
+	}
+
+	if (!user)
+		return FALSE;
+
+	LSA_HANDLE handle;
+	LSA_OBJECT_ATTRIBUTES attributes;
+	ZeroMemory(&attributes, sizeof(attributes));
+
+	BOOL result = FALSE;
+	if (LsaOpenPolicy(NULL, &attributes, POLICY_ALL_ACCESS, &handle) == 0) 
+	{
+		LSA_UNICODE_STRING lockmem;
+		lockmem.Buffer = L"SeLockMemoryPrivilege";
+		lockmem.Length = 42;
+		lockmem.MaximumLength = 44;
+
+		PLSA_UNICODE_STRING rights = NULL;
+		ULONG cnt = 0;
+		BOOL bHasRights = FALSE;
+		if (LsaEnumerateAccountRights(handle, user->User.Sid, &rights, &cnt) == 0)
+		{
+			for (size_t i = 0; i < cnt; i++)
+			{
+				if (rights[i].Length == lockmem.Length &&
+					memcmp(rights[i].Buffer, lockmem.Buffer, 42) == 0)
+				{
+					bHasRights = TRUE;
+					break;
+				}
+			}
+
+			LsaFreeMemory(rights);
+		}
+
+		if(!bHasRights)
+			result = LsaAddAccountRights(handle, user->User.Sid, &lockmem, 1) == 0;
+
+		LsaClose(handle);
+	}
+
+	LocalFree(user);
+	return result;
+}
 #endif
 
 size_t cryptonight_init(size_t use_fast_mem, size_t use_mlock, alloc_msg* msg)
 {
 #ifdef _WIN32
-	if (AddPrivilege(TEXT("SeLockMemoryPrivilege")) == 0)
+	if(use_fast_mem == 0)
+		return 1;
+
+	if(AddPrivilege(TEXT("SeLockMemoryPrivilege")) == 0)
 	{
-		msg->warning = "Obtaning SeLockMemoryPrivilege failed.";
+		if(AddLargePageRights())
+		{
+			msg->warning = "Added SeLockMemoryPrivilege to the current account. You need to reboot for it to work";
+			bRebootDesirable = TRUE;
+		}
+		else
+			msg->warning = "Obtaning SeLockMemoryPrivilege failed.";
+
 		return 0;
 	}
+	
+	bRebootDesirable = TRUE;
 	return 1;
 #else
 	return 1;
@@ -133,7 +217,10 @@ cryptonight_ctx* cryptonight_alloc_ctx(size_t use_fast_mem, size_t use_mlock, al
 	if(ptr->long_state == NULL)
 	{
 		_mm_free(ptr);
-		msg->warning = "VirtualAlloc failed.";
+		if(bRebootDesirable)
+			msg->warning = "VirtualAlloc failed. Reboot might help.";
+		else
+			msg->warning = "VirtualAlloc failed.";
 		return NULL;
 	}
 	else