tests/shared_cache_tests.c

   1 #include <darwintest.h>
   2 #include <darwintest_utils.h>
   3 #include <mach-o/dyld.h>
   4 #include <mach-o/dyld_priv.h>
   5 #include <TargetConditionals.h>
   6
   7 T_GLOBAL_META(T_META_NAMESPACE("xnu.shared_cache"));
   8
   9 // Give the test up to two minutes because in the failure case we want to invoke update_dyld_shared_cache, which
  10 // might take a bit to do.
  11 T_DECL(present, "tests that the device is running with a shared cache", T_META_ASROOT(true), T_META_TIMEOUT(120))
  12 {
  13         size_t shared_cache_len = 0;
  14         const void *cache_header = _dyld_get_shared_cache_range(&shared_cache_len);
  15
  16 #if TARGET_OS_OSX
  17         T_SKIP("shared cache testing support incomplete (57267667)");
  18 #endif /* TARGET_OS_OSX */
  19
  20         if ((cache_header == NULL) || (shared_cache_len == 0)) {
  21 #if TARGET_OS_OSX
  22                 char *tmp_dir = (char *) dt_tmpdir();
  23                 T_QUIET; T_ASSERT_NOTNULL(tmp_dir, "darwintest created tmp dir");
  24                 // Try to invoke update_dyld_shared_cache to gather information on why we're not running with a shared cache
  25                 char *shared_cache_update_cmd[] = { "/usr/bin/update_dyld_shared_cache", "-debug", "-cache_dir", tmp_dir, NULL };
  26                 pid_t child1 = dt_launch_tool_pipe(shared_cache_update_cmd, false, NULL, ^bool (char *data, __unused size_t data_size, __unused dt_pipe_data_handler_context_t *context) {
  27                         T_LOG("%s", data);
  28                         return false;
  29                 }, ^bool (__unused char *data, __unused size_t data_size, __unused dt_pipe_data_handler_context_t *context) {
  30                         T_LOG("%s", data);
  31                         return false;
  32                 }, BUFFER_PATTERN_LINE, NULL);
  33
  34                 int status = 0;
  35                 dt_waitpid(child1, &status, NULL, 0);
  36
  37                 T_LOG("waitpid for %d returned with status %d", child1, WEXITSTATUS(status));
  38 #endif // TARGET_OS_OSX
  39                 T_ASSERT_NOTNULL(cache_header, "shared cache present");
  40                 T_ASSERT_GT((int) shared_cache_len, 0, "shared cache has non-zero length");
  41         }
  42
  43         T_PASS("shared cache appears to be present and valid");
  44 }