143     fprintf(nullptr, "oops");  in fprintf_null()
156     fprintf(stderr, "usage: %s KIND\n", getprogname());  in usage()
157     fprintf(stderr, "\n");  in usage()
158     fprintf(stderr, "where KIND is:\n");  in usage()
159     fprintf(stderr, "  smash-stack           overwrite a -fstack-protector guard\n");  in usage()
160     fprintf(stderr, "  stack-overflow        recurse until the stack overflows\n");  in usage()
161     fprintf(stderr, "  nostack               crash with a NULL stack pointer\n");  in usage()
162     fprintf(stderr, "\n");  in usage()
163     fprintf(stderr, "  heap-corruption       cause a libc abort by corrupting the heap\n");  in usage()
164     fprintf(stderr, "  heap-usage            cause a libc abort by abusing a heap function\n");  in usage()
165     fprintf(stderr, "\n");  in usage()
166     fprintf(stderr, "  abort                 call abort()\n");  in usage()
167     fprintf(stderr, "  assert                call assert() without a function\n");  in usage()
168     fprintf(stderr, "  assert2               call assert() with a function\n");  in usage()
169     fprintf(stderr, "  exit                  call exit(1)\n");  in usage()
170     fprintf(stderr, "\n");  in usage()
171     fprintf(stderr, "  fortify               fail a _FORTIFY_SOURCE check\n");  in usage()
172     fprintf(stderr, "  seccomp               fail a seccomp check\n");  in usage()
174     fprintf(stderr, "  kuser_helper_version  call kuser_helper_version\n");  in usage()
175     fprintf(stderr, "  kuser_get_tls         call kuser_get_tls\n");  in usage()
176     fprintf(stderr, "  kuser_cmpxchg         call kuser_cmpxchg\n");  in usage()
177     fprintf(stderr, "  kuser_memory_barrier  call kuser_memory_barrier\n");  in usage()
178     fprintf(stderr, "  kuser_cmpxchg64       call kuser_cmpxchg64\n");  in usage()
180     fprintf(stderr, "\n");  in usage()
181     fprintf(stderr, "  LOG_ALWAYS_FATAL      call liblog LOG_ALWAYS_FATAL\n");  in usage()
182     fprintf(stderr, "  LOG_ALWAYS_FATAL_IF   call liblog LOG_ALWAYS_FATAL_IF\n");  in usage()
183     fprintf(stderr, "  LOG-FATAL             call libbase LOG(FATAL)\n");  in usage()
184     fprintf(stderr, "\n");  in usage()
185     fprintf(stderr, "  SIGFPE                cause a SIGFPE\n");  in usage()
186     fprintf(stderr, "  SIGSEGV               cause a SIGSEGV at address 0x0 (synonym: crash)\n");  in usage()
187     fprintf(stderr, "  SIGSEGV-non-null      cause a SIGSEGV at a non-zero address\n");  in usage()
188 …fprintf(stderr, "  SIGSEGV-unmapped      mmap/munmap a region of memory and then attempt to access…  in usage()
189     fprintf(stderr, "  SIGTRAP               cause a SIGTRAP\n");  in usage()
190     fprintf(stderr, "\n");  in usage()
191     fprintf(stderr, "  fprintf-NULL          pass a null pointer to fprintf\n");  in usage()
192     fprintf(stderr, "  readdir-NULL          pass a null pointer to readdir\n");  in usage()
193     fprintf(stderr, "  strlen-NULL           pass a null pointer to strlen\n");  in usage()
194     fprintf(stderr, "  pthread_join-NULL     pass a null pointer to pthread_join\n");  in usage()
195     fprintf(stderr, "\n");  in usage()
196     fprintf(stderr, "  no_new_privs          set PR_SET_NO_NEW_PRIVS and then abort\n");  in usage()
197     fprintf(stderr, "\n");  in usage()
198     fprintf(stderr, "prefix any of the above with 'thread-' to run on a new thread\n");  in usage()
199     fprintf(stderr, "prefix any of the above with 'exhaustfd-' to exhaust\n");  in usage()
200     fprintf(stderr, "all available file descriptors before crashing.\n");  in usage()
201 …fprintf(stderr, "prefix any of the above with 'wait-' to wait until input is received on stdin\n");  in usage()
290           fprintf(stderr, "prctl(PR_SET_NO_NEW_PRIVS, 1) failed: %s\n", strerror(errno));  in do_action()
298     fprintf(stderr, "%s: exiting normally!\n", getprogname());  in do_action()