test/svc: add test for thread create

tests/TestSvc/source/test_thread_creation.cpp

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "util_common.hpp"
+#include "util_scoped_heap.hpp"
+
+namespace ams::test {
+
+    void TestThreadCreateRegistersOnFunctionEntry(void *ctx);
+
+    DOCTEST_TEST_CASE( "Creating a thread results in fixed register contents." ) {
+        /* Create heap. */
+        ScopedHeap heap(os::MemoryPageSize);
+
+        /* Create register buffer. */
+        u64 thread_registers[32];
+        std::memset(thread_registers, 0xCC, sizeof(thread_registers));
+
+        /* Create thread. */
+        svc::Handle thread_handle;
+        DOCTEST_CHECK(R_SUCCEEDED(svc::CreateThread(std::addressof(thread_handle), reinterpret_cast<uintptr_t>(&TestThreadCreateRegistersOnFunctionEntry), reinterpret_cast<uintptr_t>(thread_registers), heap.GetAddress() + os::MemoryPageSize, HighestTestPriority, NumCores - 1)));
+
+        /* Start thread. */
+        DOCTEST_CHECK(R_SUCCEEDED(svc::StartThread(thread_handle)));
+
+        /* Wait for thread to exit. */
+        s32 dummy;
+        DOCTEST_CHECK(R_SUCCEEDED(svc::WaitSynchronization(std::addressof(dummy), std::addressof(thread_handle), 1, -1)));
+
+        /* Close thread handle. */
+        DOCTEST_CHECK(R_SUCCEEDED(svc::CloseHandle(thread_handle)));
+
+        /* Check thread initial registers. */
+        for (size_t i = 0; i < util::size(thread_registers); ++i) {
+            if (i == 0) {
+                /* X0 is argument. */
+                DOCTEST_CHECK(thread_registers[i] == reinterpret_cast<uintptr_t>(thread_registers));
+            } else if (i == 18) {
+                /* X18 is an odd cfi value. */
+                DOCTEST_CHECK(thread_registers[i] != 0);
+                DOCTEST_CHECK((thread_registers[i] & 0x1) != 0);
+            } else if (i == 31) {
+                /* SP is user-provided sp. */
+                DOCTEST_CHECK(thread_registers[i] == (heap.GetAddress() + os::MemoryPageSize));
+            } else {
+                /* All other registers are zero. */
+                DOCTEST_CHECK(thread_registers[i] == 0);
+            }
+        }
+    }
+
+}