tests/main_stack.c

   1 #include <stdlib.h>
   2 #include <pthread.h>
   3 #include "darwintest_defaults.h"
   4 #include <machine/vmparam.h>
   5
   6 T_DECL(main_stack, "tests the reported values for the main thread stack",
   7                 T_META_CHECK_LEAKS(NO), T_META_ALL_VALID_ARCHS(YES)){
   8         const uintptr_t stackaddr = (uintptr_t)pthread_get_stackaddr_np(pthread_self());
   9         const size_t stacksize = pthread_get_stacksize_np(pthread_self());
  10         T_LOG("stack: %zx -> %zx (+%zx)", stackaddr - stacksize, stackaddr, stacksize);
  11         T_EXPECT_LT((uintptr_t)__builtin_frame_address(0), stackaddr, NULL);
  12         T_EXPECT_GT((uintptr_t)__builtin_frame_address(0), stackaddr - stacksize, NULL);
  13
  14         struct rlimit lim;
  15         T_ASSERT_POSIX_SUCCESS(getrlimit(RLIMIT_STACK, &lim), NULL);
  16         T_EXPECT_EQ((size_t)lim.rlim_cur, pthread_get_stacksize_np(pthread_self()), "reported rlimit should match stacksize");
  17
  18         lim.rlim_cur = lim.rlim_cur / 8;
  19         T_ASSERT_POSIX_SUCCESS(setrlimit(RLIMIT_STACK, &lim), NULL);
  20
  21         T_EXPECTFAIL;
  22         T_EXPECT_EQ((size_t)lim.rlim_cur, pthread_get_stacksize_np(pthread_self()), "new rlimit should should match stacksize");
  23 }