contrib/llvm/projects/libunwind/src/config.h

   1 //===----------------------------- config.h -------------------------------===//
   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 //  Defines macros used within libuwind project.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13
  14 #ifndef LIBUNWIND_CONFIG_H
  15 #define LIBUNWIND_CONFIG_H
  16
  17 #include <assert.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20
  21 // Define static_assert() unless already defined by compiler.
  22 #ifndef __has_feature
  23   #define __has_feature(__x) 0
  24 #endif
  25 #if !(__has_feature(cxx_static_assert)) && !defined(static_assert)
  26   #define static_assert(__b, __m) \
  27       extern int compile_time_assert_failed[ ( __b ) ? 1 : -1 ]  \
  28                                                   __attribute__( ( unused ) );
  29 #endif
  30
  31 // Platform specific configuration defines.
  32 #ifdef __APPLE__
  33   #if defined(FOR_DYLD)
  34     #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 1
  35     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND   0
  36     #define _LIBUNWIND_SUPPORT_DWARF_INDEX    0
  37   #else
  38     #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 1
  39     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND   1
  40     #define _LIBUNWIND_SUPPORT_DWARF_INDEX    0
  41   #endif
  42 #else
  43   #if defined(__ARM_DWARF_EH__) || !defined(__arm__)
  44     #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 0
  45     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND 1
  46     #define _LIBUNWIND_SUPPORT_DWARF_INDEX 1
  47   #else
  48     #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 0
  49     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND 0
  50     #define _LIBUNWIND_SUPPORT_DWARF_INDEX 0
  51   #endif
  52 #endif
  53
  54 // FIXME: these macros are not correct for COFF targets
  55 #define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
  56 #define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
  57
  58 #if (defined(__APPLE__) && defined(__arm__)) || defined(__USING_SJLJ_EXCEPTIONS__)
  59 #define _LIBUNWIND_BUILD_SJLJ_APIS 1
  60 #else
  61 #define _LIBUNWIND_BUILD_SJLJ_APIS 0
  62 #endif
  63
  64 #if defined(__i386__) || defined(__x86_64__)
  65 #define _LIBUNWIND_SUPPORT_FRAME_APIS 1
  66 #else
  67 #define _LIBUNWIND_SUPPORT_FRAME_APIS 0
  68 #endif
  69
  70 #if defined(__i386__) || defined(__x86_64__) ||                                \
  71     (!defined(__APPLE__) && defined(__arm__)) ||                               \
  72     (defined(__arm64__) || defined(__aarch64__)) ||                            \
  73     (defined(__APPLE__) && defined(__mips__)) ||                               \
  74     defined(__riscv__)
  75 #define _LIBUNWIND_BUILD_ZERO_COST_APIS 1
  76 #else
  77 #define _LIBUNWIND_BUILD_ZERO_COST_APIS 0
  78 #endif
  79
  80 #define _LIBUNWIND_ABORT(msg)                                                  \
  81   do {                                                                         \
  82     fprintf(stderr, "libunwind: %s %s:%d - %s\n", __func__, __FILE__,          \
  83             __LINE__, msg);                                                    \
  84     fflush(stderr);                                                            \
  85     abort();                                                                   \
  86   } while (0)
  87 #define _LIBUNWIND_LOG(msg, ...) fprintf(stderr, "libuwind: " msg, __VA_ARGS__)
  88
  89 // Macros that define away in non-Debug builds
  90 #ifdef NDEBUG
  91   #define _LIBUNWIND_DEBUG_LOG(msg, ...)
  92   #define _LIBUNWIND_TRACE_API(msg, ...)
  93   #define _LIBUNWIND_TRACING_UNWINDING 0
  94   #define _LIBUNWIND_TRACE_UNWINDING(msg, ...)
  95   #define _LIBUNWIND_LOG_NON_ZERO(x) x
  96 #else
  97   #ifdef __cplusplus
  98     extern "C" {
  99   #endif
 100     extern  bool logAPIs();
 101     extern  bool logUnwinding();
 102   #ifdef __cplusplus
 103     }
 104   #endif
 105   #define _LIBUNWIND_DEBUG_LOG(msg, ...)  _LIBUNWIND_LOG(msg, __VA_ARGS__)
 106   #define _LIBUNWIND_LOG_NON_ZERO(x) \
 107             do { \
 108               int _err = x; \
 109               if ( _err != 0 ) \
 110                 _LIBUNWIND_LOG("" #x "=%d in %s", _err, __FUNCTION__); \
 111              } while (0)
 112   #define _LIBUNWIND_TRACE_API(msg, ...) \
 113             do { \
 114               if ( logAPIs() ) _LIBUNWIND_LOG(msg, __VA_ARGS__); \
 115             } while(0)
 116   #define _LIBUNWIND_TRACE_UNWINDING(msg, ...) \
 117             do { \
 118               if ( logUnwinding() ) _LIBUNWIND_LOG(msg, __VA_ARGS__); \
 119             } while(0)
 120   #define _LIBUNWIND_TRACING_UNWINDING logUnwinding()
 121 #endif
 122
 123 #ifdef __cplusplus
 124 // Used to fit UnwindCursor and Registers_xxx types against unw_context_t /
 125 // unw_cursor_t sized memory blocks.
 126 #if defined(_LIBUNWIND_IS_NATIVE_ONLY)
 127 # define COMP_OP ==
 128 #else
 129 # define COMP_OP <
 130 #endif
 131 template <typename _Type, typename _Mem>
 132 struct check_fit {
 133   template <typename T>
 134   struct blk_count {
 135     static const size_t count =
 136       (sizeof(T) + sizeof(uint64_t) - 1) / sizeof(uint64_t);
 137   };
 138   static const bool does_fit =
 139     (blk_count<_Type>::count COMP_OP blk_count<_Mem>::count);
 140 };
 141 #undef COMP_OP
 142 #endif // __cplusplus
 143
 144 #endif // LIBUNWIND_CONFIG_H