vendor/compiler_builtins/compiler-rt/lib/builtins/int_util.c

   1 /* ===-- int_util.c - Implement internal utilities --------------------------===
   2  *
   3  *                     The LLVM Compiler Infrastructure
   4  *
   5  * This file is dual licensed under the MIT and the University of Illinois Open
   6  * Source Licenses. See LICENSE.TXT for details.
   7  *
   8  * ===----------------------------------------------------------------------===
   9  */
  10
  11 #include "int_lib.h"
  12 #include "int_util.h"
  13
  14 /* NOTE: The definitions in this file are declared weak because we clients to be
  15  * able to arbitrarily package individual functions into separate .a files. If
  16  * we did not declare these weak, some link situations might end up seeing
  17  * duplicate strong definitions of the same symbol.
  18  *
  19  * We can't use this solution for kernel use (which may not support weak), but
  20  * currently expect that when built for kernel use all the functionality is
  21  * packaged into a single library.
  22  */
  23
  24 #ifdef KERNEL_USE
  25
  26 NORETURN extern void panic(const char *, ...);
  27 #ifndef _WIN32
  28 __attribute__((visibility("hidden")))
  29 #endif
  30 void __compilerrt_abort_impl(const char *file, int line, const char *function) {
  31   panic("%s:%d: abort in %s", file, line, function);
  32 }
  33
  34 #elif __APPLE__
  35
  36 /* from libSystem.dylib */
  37 NORETURN extern void __assert_rtn(const char *func, const char *file, int line,
  38                                   const char *message);
  39
  40 #ifndef _WIN32
  41 __attribute__((weak))
  42 __attribute__((visibility("hidden")))
  43 #endif
  44 void __compilerrt_abort_impl(const char *file, int line, const char *function) {
  45   __assert_rtn(function, file, line, "libcompiler_rt abort");
  46 }
  47
  48 #elif __Fuchsia__
  49
  50 #ifndef _WIN32
  51 __attribute__((weak))
  52 __attribute__((visibility("hidden")))
  53 #endif
  54 void __compilerrt_abort_impl(const char *file, int line, const char *function) {
  55   __builtin_trap();
  56 }
  57
  58 #else
  59
  60 /* Get the system definition of abort() */
  61 #include <stdlib.h>
  62
  63 #ifndef _WIN32
  64 __attribute__((weak))
  65 __attribute__((visibility("hidden")))
  66 #endif
  67 void __compilerrt_abort_impl(const char *file, int line, const char *function) {
  68   abort();
  69 }
  70
  71 #endif