libsyscall/wrappers/terminate_with_reason.c

   1 /*
   2  * Copyright (c) 2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #include <sys/reason.h>
  24 #include <sys/types.h>
  25 #include <stdint.h>
  26 #include <signal.h>
  27 #include <unistd.h>
  28
  29 /* System call entry points */
  30 int __terminate_with_payload(int pid, uint32_t reason_namespace, uint64_t reason_code,
  31                                 void *payload, uint32_t payload_size, const char *reason_string,
  32                                 uint64_t reason_flags);
  33
  34 void __abort_with_payload(uint32_t reason_namespace, uint64_t reason_code,
  35                                 void *payload, uint32_t payload_size, const char *reason_string,
  36                                 uint64_t reason_flags);
  37
  38 static void abort_with_payload_wrapper_internal(uint32_t reason_namespace, uint64_t reason_code,
  39                                 void *payload, uint32_t payload_size, const char *reason_string,
  40                                 uint64_t reason_flags) __attribute__((noreturn));
  41
  42 /* System call wrappers */
  43 int
  44 terminate_with_reason(int pid, uint32_t reason_namespace, uint64_t reason_code,
  45                         const char *reason_string, uint64_t reason_flags)
  46 {
  47         return __terminate_with_payload(pid, reason_namespace, reason_code, 0, 0,
  48                                         reason_string, reason_flags);
  49 }
  50
  51 int
  52 terminate_with_payload(int pid, uint32_t reason_namespace, uint64_t reason_code,
  53                         void *payload, uint32_t payload_size,
  54                         const char *reason_string, uint64_t reason_flags)
  55 {
  56         return __terminate_with_payload(pid, reason_namespace, reason_code, payload,
  57                                         payload_size, reason_string, reason_flags);
  58 }
  59
  60 static void abort_with_payload_wrapper_internal(uint32_t reason_namespace, uint64_t reason_code,
  61                                 void *payload, uint32_t payload_size, const char *reason_string,
  62                                 uint64_t reason_flags)
  63 {
  64         sigset_t unmask_signal;
  65
  66         /* Try to unmask SIGABRT before trapping to the kernel */
  67         sigemptyset(&unmask_signal);
  68         sigaddset(&unmask_signal, SIGABRT);
  69         sigprocmask(SIG_UNBLOCK, &unmask_signal, NULL);
  70
  71         __abort_with_payload(reason_namespace, reason_code, payload, payload_size,
  72                         reason_string, reason_flags);
  73
  74         /* If sending a SIGABRT failed, we fall back to SIGKILL */
  75         terminate_with_payload(getpid(), reason_namespace, reason_code, payload, payload_size,
  76                         reason_string, reason_flags);
  77
  78         __builtin_unreachable();
  79 }
  80
  81 void
  82 abort_with_reason(uint32_t reason_namespace, uint64_t reason_code, const char *reason_string,
  83                         uint64_t reason_flags)
  84 {
  85         abort_with_payload_wrapper_internal(reason_namespace, reason_code, 0, 0, reason_string, reason_flags);
  86 }
  87
  88 void
  89 abort_with_payload(uint32_t reason_namespace, uint64_t reason_code, void *payload,
  90                         uint32_t payload_size, const char *reason_string,
  91                         uint64_t reason_flags)
  92 {
  93         abort_with_payload_wrapper_internal(reason_namespace, reason_code, payload, payload_size,
  94                         reason_string, reason_flags);
  95 }
  96