test/svc: add test for thread create

tests/TestSvc/source/test_thread_creation.arch.arm64.s

@@ -0,0 +1,43 @@
+/*
+ * 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/>.
+ */
+
+/* ams::test::TestThreadCreateRegistersOnFunctionEntry(void *ctx) */
+.section    .text._ZN3ams4test40TestThreadCreateRegistersOnFunctionEntryEPv, "ax", %progbits
+.global     _ZN3ams4test40TestThreadCreateRegistersOnFunctionEntryEPv
+.type       _ZN3ams4test40TestThreadCreateRegistersOnFunctionEntryEPv, %function
+_ZN3ams4test40TestThreadCreateRegistersOnFunctionEntryEPv:
+    /* Save all registers to our context. */
+    stp  x0,  x1, [x0, #0x00]
+    stp  x2,  x3, [x0, #0x10]
+    stp  x4,  x5, [x0, #0x20]
+    stp  x6,  x7, [x0, #0x30]
+    stp  x8,  x9, [x0, #0x40]
+    stp x10, x11, [x0, #0x50]
+    stp x12, x13, [x0, #0x60]
+    stp x14, x15, [x0, #0x70]
+    stp x16, x17, [x0, #0x80]
+    stp x18, x19, [x0, #0x90]
+    stp x20, x21, [x0, #0xA0]
+    stp x22, x23, [x0, #0xB0]
+    stp x24, x25, [x0, #0xC0]
+    stp x26, x27, [x0, #0xD0]
+    stp x28, x29, [x0, #0xE0]
+
+    mov x1, sp
+    stp x30, x1, [x0, #0xF0]
+
+    /* Exit the thread. */
+    svc     0xa

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);
+            }
+        }
+    }
+
+}

tests/TestSvc/source/util_common.hpp

@@ -46,7 +46,7 @@ namespace ams::test {
 
         /* Wait long enough that we can be confident preemption will occur, and therefore our interrupt flag will be set. */
         {
-            constexpr auto MinimumTicksToGuaranteeInterruptFlag = ::ams::svc::Tick(PreemptionTimeSpan) + 1;
+            constexpr auto MinimumTicksToGuaranteeInterruptFlag = ::ams::svc::Tick(PreemptionTimeSpan) + ::ams::svc::Tick(PreemptionTimeSpan) + 2;
 
             auto GetSystemTickForPinnedThread = []() ALWAYS_INLINE_LAMBDA -> ::ams::svc::Tick {
                 s64 v;