[test_runner] Add handle test suite

For now this just tests handle cloning and basic capability checking.

src/libraries/j6/j6/caps.h.cog

@@ -4,6 +4,8 @@
 /// \file caps.h
 /// Capability bitfield constants
 
+#define j6_handle_caps(h)  (((h)>>32) & 0xffffff)
+
 /*[[[cog code generation
 from definitions.context import Context
 

src/user/test_runner/test_runner.module

@@ -9,6 +9,7 @@ module("test_runner",
         "test_case.cpp",
 
         "tests/constexpr_hash.cpp",
+        "tests/handles.cpp",
         "tests/linked_list.cpp",
         "tests/mailbox.cpp",
         "tests/map.cpp",

src/user/test_runner/tests/handles.cpp

@@ -0,0 +1,26 @@
+#include <j6/caps.h>
+#include <j6/errors.h>
+#include <j6/syscalls.h>
+#include <j6/types.h>
+#include "test_case.h"
+
+extern j6_handle_t __handle_self;
+
+struct handle_tests :
+    public test::fixture
+{
+};
+
+TEST_CASE( handle_tests, clone_cap )
+{
+    j6_status_t s;
+    j6_handle_t self0 = __handle_self;
+
+    j6_handle_t self1 = j6_handle_invalid;
+    s = j6_handle_clone(self0, &self1, j6_handle_caps(self0) & ~j6_cap_object_clone);
+    CHECK( s == j6_status_ok, "Cloning self handle" );
+
+    j6_handle_t self2 = j6_handle_invalid;
+    s = j6_handle_clone(self1, &self2, j6_handle_caps(self1));
+    CHECK( s == j6_err_denied, "Cloning non-clonable handle" );
+}

src/user/test_runner/tests/mailbox.cpp

@@ -28,7 +28,7 @@ TEST_CASE( mailbox_tests, would_block )
     size_t buffer_size = 128;
     j6_handle_t handles[10];
     size_t handle_count = 10;
-    uint64_t reply_tag = 0;
+    uint16_t reply_tag = 0;
     uint64_t badge = 0;
     uint64_t flags = 0;
 
@@ -66,7 +66,7 @@ TEST_CASE( mailbox_tests, send_receive )
     size_t in_buffer_size = 128;
     j6_handle_t in_handles[10];
     size_t in_handle_count = 10;
-    uint64_t in_reply_tag = 0;
+    uint16_t in_reply_tag = 0;
     uint64_t in_badge = 0;
     uint64_t in_flags = 0;