compiler-rt/lib/scudo/standalone/platform.h

   1 //===-- platform.h ----------------------------------------------*- C++ -*-===//
   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 #ifndef SCUDO_PLATFORM_H_
  10 #define SCUDO_PLATFORM_H_
  11
  12 // Transitive includes of stdint.h specify some of the defines checked below.
  13 #include <stdint.h>
  14
  15 #if defined(__linux__) && !defined(__TRUSTY__)
  16 #define SCUDO_LINUX 1
  17 #else
  18 #define SCUDO_LINUX 0
  19 #endif
  20
  21 // See https://android.googlesource.com/platform/bionic/+/master/docs/defines.md
  22 #if defined(__BIONIC__)
  23 #define SCUDO_ANDROID 1
  24 #else
  25 #define SCUDO_ANDROID 0
  26 #endif
  27
  28 #if defined(__Fuchsia__)
  29 #define SCUDO_FUCHSIA 1
  30 #else
  31 #define SCUDO_FUCHSIA 0
  32 #endif
  33
  34 #if defined(__TRUSTY__)
  35 #define SCUDO_TRUSTY 1
  36 #else
  37 #define SCUDO_TRUSTY 0
  38 #endif
  39
  40 #if defined(__riscv) && (__riscv_xlen == 64)
  41 #define SCUDO_RISCV64 1
  42 #else
  43 #define SCUDO_RISCV64 0
  44 #endif
  45
  46 #if defined(__LP64__)
  47 #define SCUDO_WORDSIZE 64U
  48 #else
  49 #define SCUDO_WORDSIZE 32U
  50 #endif
  51
  52 #if SCUDO_WORDSIZE == 64U
  53 #define FIRST_32_SECOND_64(a, b) (b)
  54 #else
  55 #define FIRST_32_SECOND_64(a, b) (a)
  56 #endif
  57
  58 #ifndef SCUDO_CAN_USE_PRIMARY64
  59 #define SCUDO_CAN_USE_PRIMARY64 (SCUDO_WORDSIZE == 64U)
  60 #endif
  61
  62 #ifndef SCUDO_CAN_USE_MTE
  63 #define SCUDO_CAN_USE_MTE (SCUDO_LINUX || SCUDO_TRUSTY)
  64 #endif
  65
  66 // Use smaller table sizes for fuzzing in order to reduce input size.
  67 // Trusty just has less available memory.
  68 #ifndef SCUDO_SMALL_STACK_DEPOT
  69 #if defined(SCUDO_FUZZ) || SCUDO_TRUSTY
  70 #define SCUDO_SMALL_STACK_DEPOT 1
  71 #else
  72 #define SCUDO_SMALL_STACK_DEPOT 0
  73 #endif
  74 #endif
  75
  76 #ifndef SCUDO_ENABLE_HOOKS
  77 #define SCUDO_ENABLE_HOOKS 0
  78 #endif
  79
  80 #ifndef SCUDO_MIN_ALIGNMENT_LOG
  81 // We force malloc-type functions to be aligned to std::max_align_t, but there
  82 // is no reason why the minimum alignment for all other functions can't be 8
  83 // bytes. Except obviously for applications making incorrect assumptions.
  84 // TODO(kostyak): define SCUDO_MIN_ALIGNMENT_LOG 3
  85 #define SCUDO_MIN_ALIGNMENT_LOG FIRST_32_SECOND_64(3, 4)
  86 #endif
  87
  88 #if defined(__aarch64__)
  89 #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 48)
  90 #else
  91 #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47)
  92 #endif
  93
  94 // Older gcc have issues aligning to a constexpr, and require an integer.
  95 // See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56859 among others.
  96 #if defined(__powerpc__) || defined(__powerpc64__)
  97 #define SCUDO_CACHE_LINE_SIZE 128
  98 #else
  99 #define SCUDO_CACHE_LINE_SIZE 64
 100 #endif
 101
 102 #define SCUDO_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 12)
 103
 104 #endif // SCUDO_PLATFORM_H_