src/third_party/libc++abi/trunk/src/Unwind/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
  19 // Define static_assert() unless already defined by compiler.
  20 #ifndef __has_feature
  21   #define __has_feature(__x) 0
  22 #endif
  23 #if !(__has_feature(cxx_static_assert))
  24   #define static_assert(__b, __m) \
  25       extern int compile_time_assert_failed[ ( __b ) ? 1 : -1 ]  \
  26                                                   __attribute__( ( unused ) );
  27 #endif
  28
  29 // Platform specific configuration defines.
  30 #if __APPLE__
  31   #include <Availability.h>
  32   #ifdef __cplusplus
  33     extern "C" {
  34   #endif
  35     void __assert_rtn(const char *, const char *, int, const char *)
  36                                                       __attribute__((noreturn));
  37   #ifdef __cplusplus
  38     }
  39   #endif
  40
  41   #define _LIBUNWIND_BUILD_ZERO_COST_APIS (__i386__ || __x86_64__ || __arm64__)
  42   #define _LIBUNWIND_BUILD_SJLJ_APIS      (__arm__)
  43   #define _LIBUNWIND_SUPPORT_FRAME_APIS   (__i386__ || __x86_64__)
  44   #define _LIBUNWIND_EXPORT               __attribute__((visibility("default")))
  45   #define _LIBUNWIND_HIDDEN               __attribute__((visibility("hidden")))
  46   #define _LIBUNWIND_LOG(msg, ...) fprintf(stderr, "libuwind: " msg, __VA_ARGS__)
  47   #define _LIBUNWIND_ABORT(msg) __assert_rtn(__func__, __FILE__, __LINE__, msg)
  48
  49   #if FOR_DYLD
  50     #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 1
  51     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND   0
  52     #define _LIBUNWIND_SUPPORT_DWARF_INDEX    0
  53   #else
  54     #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 1
  55     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND   1
  56     #define _LIBUNWIND_SUPPORT_DWARF_INDEX    0
  57   #endif
  58
  59 #else
  60   // #define _LIBUNWIND_BUILD_ZERO_COST_APIS
  61   // #define _LIBUNWIND_BUILD_SJLJ_APIS
  62   // #define _LIBUNWIND_SUPPORT_FRAME_APIS
  63   // #define _LIBUNWIND_EXPORT
  64   // #define _LIBUNWIND_HIDDEN
  65   // #define _LIBUNWIND_LOG()
  66   // #define _LIBUNWIND_ABORT()
  67   // #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND
  68   // #define _LIBUNWIND_SUPPORT_DWARF_UNWIND
  69   // #define _LIBUNWIND_SUPPORT_DWARF_INDEX
  70 #endif
  71
  72
  73 // Macros that define away in non-Debug builds
  74 #ifdef NDEBUG
  75   #define _LIBUNWIND_DEBUG_LOG(msg, ...)
  76   #define _LIBUNWIND_TRACE_API(msg, ...)
  77   #define _LIBUNWIND_TRACING_UNWINDING 0
  78   #define _LIBUNWIND_TRACE_UNWINDING(msg, ...)
  79   #define _LIBUNWIND_LOG_NON_ZERO(x) x
  80 #else
  81   #ifdef __cplusplus
  82     extern "C" {
  83   #endif
  84     extern  bool logAPIs();
  85     extern  bool logUnwinding();
  86   #ifdef __cplusplus
  87     }
  88   #endif
  89   #define _LIBUNWIND_DEBUG_LOG(msg, ...)  _LIBUNWIND_LOG(msg, __VA_ARGS__)
  90   #define _LIBUNWIND_LOG_NON_ZERO(x) \
  91             do { \
  92               int _err = x; \
  93               if ( _err != 0 ) \
  94                 _LIBUNWIND_LOG("" #x "=%d in %s", _err, __FUNCTION__); \
  95              } while (0)
  96   #define _LIBUNWIND_TRACE_API(msg, ...) \
  97             do { \
  98               if ( logAPIs() ) _LIBUNWIND_LOG(msg, __VA_ARGS__); \
  99             } while(0)
 100   #define _LIBUNWIND_TRACE_UNWINDING(msg, ...) \
 101             do { \
 102               if ( logUnwinding() ) _LIBUNWIND_LOG(msg, __VA_ARGS__); \
 103             } while(0)
 104   #define _LIBUNWIND_TRACING_UNWINDING logUnwinding()
 105 #endif
 106
 107
 108 #endif // LIBUNWIND_CONFIG_H