compiler-rt/lib/builtins/int_util.c

   1 //===-- int_util.c - Implement internal utilities -------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "int_lib.h"
  10
  11 // NOTE: The definitions in this file are declared weak because we clients to be
  12 // able to arbitrarily package individual functions into separate .a files. If
  13 // we did not declare these weak, some link situations might end up seeing
  14 // duplicate strong definitions of the same symbol.
  15 //
  16 // We can't use this solution for kernel use (which may not support weak), but
  17 // currently expect that when built for kernel use all the functionality is
  18 // packaged into a single library.
  19
  20 #ifdef KERNEL_USE
  21
  22 NORETURN extern void panic(const char *, ...);
  23 #ifndef _WIN32
  24 __attribute__((visibility("hidden")))
  25 #endif
  26 void __compilerrt_abort_impl(const char *file, int line, const char *function) {
  27   panic("%s:%d: abort in %s", file, line, function);
  28 }
  29
  30 #elif __APPLE__
  31
  32 // from libSystem.dylib
  33 NORETURN extern void __assert_rtn(const char *func, const char *file, int line,
  34                                   const char *message);
  35
  36 __attribute__((weak))
  37 __attribute__((visibility("hidden")))
  38 void __compilerrt_abort_impl(const char *file, int line, const char *function) {
  39   __assert_rtn(function, file, line, "libcompiler_rt abort");
  40 }
  41
  42 #else
  43
  44 #ifdef _WIN32
  45 #include <stdlib.h>
  46 #endif
  47
  48 #ifndef _WIN32
  49 __attribute__((weak))
  50 __attribute__((visibility("hidden")))
  51 #endif
  52 void __compilerrt_abort_impl(const char *file, int line, const char *function) {
  53 #if !__STDC_HOSTED__
  54   // Avoid depending on libc when compiling with -ffreestanding.
  55   __builtin_trap();
  56 #elif defined(_WIN32)
  57   abort();
  58 #else
  59   __builtin_abort();
  60 #endif
  61 }
  62
  63 #endif