Import libunwind 3.9.0

1 files changed, 43 insertions, 83 deletions

diff --git a/lib/libunwind/src/config.h b/lib/libunwind/src/config.h
index fc7fd646707..a50222f7c90 100644
--- a/lib/libunwind/src/config.h
+++ b/lib/libunwind/src/config.h
@@ -6,7 +6,7 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //
-//  Defines macros used within libunwind project.
+//  Defines macros used within libuwind project.
 //
 //===----------------------------------------------------------------------===//
 
@@ -16,7 +16,6 @@
 
 #include <assert.h>
 #include <stdio.h>
-#include <stdint.h>
 #include <stdlib.h>
 
 // Define static_assert() unless already defined by compiler.
@@ -32,65 +31,51 @@
 // Platform specific configuration defines.
 #ifdef __APPLE__
   #if defined(FOR_DYLD)
-    #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND
+    #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 1
+    #define _LIBUNWIND_SUPPORT_DWARF_UNWIND   0
+    #define _LIBUNWIND_SUPPORT_DWARF_INDEX    0
   #else
-    #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND
+    #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 1
     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND   1
-  #endif
-#elif defined(_WIN32)
-  #ifdef __SEH__
-    #define _LIBUNWIND_SUPPORT_SEH_UNWIND 1
-  #else
-    #define _LIBUNWIND_SUPPORT_DWARF_UNWIND 1
+    #define _LIBUNWIND_SUPPORT_DWARF_INDEX    0
   #endif
 #else
   #if defined(__ARM_DWARF_EH__) || !defined(__arm__)
+    #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 0
     #define _LIBUNWIND_SUPPORT_DWARF_UNWIND 1
     #define _LIBUNWIND_SUPPORT_DWARF_INDEX 1
-  #endif
-#endif
-
-#if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
-  #define _LIBUNWIND_EXPORT
-  #define _LIBUNWIND_HIDDEN
-#else
-  #if !defined(__ELF__) && !defined(__MACH__)
-    #define _LIBUNWIND_EXPORT __declspec(dllexport)
-    #define _LIBUNWIND_HIDDEN
   #else
-    #define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
-    #define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
+    #define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 0
+    #define _LIBUNWIND_SUPPORT_DWARF_UNWIND 0
+    #define _LIBUNWIND_SUPPORT_DWARF_INDEX 0
   #endif
 #endif
 
+// FIXME: these macros are not correct for COFF targets
+#define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
+#define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
+
 #if (defined(__APPLE__) && defined(__arm__)) || defined(__USING_SJLJ_EXCEPTIONS__)
-#define _LIBUNWIND_BUILD_SJLJ_APIS
+#define _LIBUNWIND_BUILD_SJLJ_APIS 1
+#else
+#define _LIBUNWIND_BUILD_SJLJ_APIS 0
 #endif
 
-#if defined(__i386__) || defined(__x86_64__) || defined(__ppc__) || defined(__ppc64__) || defined(__powerpc64__)
-#define _LIBUNWIND_SUPPORT_FRAME_APIS
+#if defined(__i386__) || defined(__x86_64__)
+#define _LIBUNWIND_SUPPORT_FRAME_APIS 1
+#else
+#define _LIBUNWIND_SUPPORT_FRAME_APIS 0
 #endif
 
 #if defined(__i386__) || defined(__x86_64__) ||                                \
-    defined(__ppc__) || defined(__ppc64__) || defined(__powerpc64__) ||        \
     (!defined(__APPLE__) && defined(__arm__)) ||                               \
     (defined(__arm64__) || defined(__aarch64__)) ||                            \
-    defined(__mips__)
-#if !defined(_LIBUNWIND_BUILD_SJLJ_APIS)
-#define _LIBUNWIND_BUILD_ZERO_COST_APIS
-#endif
-#endif
-
-#if defined(__powerpc64__) && defined(_ARCH_PWR8)
-#define PPC64_HAS_VMX
+    (defined(__APPLE__) && defined(__mips__))
+#define _LIBUNWIND_BUILD_ZERO_COST_APIS 1
+#else
+#define _LIBUNWIND_BUILD_ZERO_COST_APIS 0
 #endif
 
-#if defined(NDEBUG) && defined(_LIBUNWIND_IS_BAREMETAL)
-#define _LIBUNWIND_ABORT(msg)                                                  \
-  do {                                                                         \
-    abort();                                                                   \
-  } while (0)
-#else
 #define _LIBUNWIND_ABORT(msg)                                                  \
   do {                                                                         \
     fprintf(stderr, "libunwind: %s %s:%d - %s\n", __func__, __FILE__,          \
@@ -98,65 +83,40 @@
     fflush(stderr);                                                            \
     abort();                                                                   \
   } while (0)
-#endif
-
-#if defined(NDEBUG) && defined(_LIBUNWIND_IS_BAREMETAL)
-#define _LIBUNWIND_LOG0(msg)
-#define _LIBUNWIND_LOG(msg, ...)
-#else
-#define _LIBUNWIND_LOG0(msg)                                               \
-  fprintf(stderr, "libunwind: " msg "\n")
-#define _LIBUNWIND_LOG(msg, ...)                                               \
-  fprintf(stderr, "libunwind: " msg "\n", __VA_ARGS__)
-#endif
-
-#if defined(NDEBUG)
-  #define _LIBUNWIND_LOG_IF_FALSE(x) x
-#else
-  #define _LIBUNWIND_LOG_IF_FALSE(x)                                           \
-    do {                                                                       \
-      bool _ret = x;                                                           \
-      if (!_ret)                                                               \
-        _LIBUNWIND_LOG("" #x " failed in %s", __FUNCTION__);                   \
-    } while (0)
-#endif
+#define _LIBUNWIND_LOG(msg, ...) fprintf(stderr, "libuwind: " msg, __VA_ARGS__)
 
 // Macros that define away in non-Debug builds
 #ifdef NDEBUG
   #define _LIBUNWIND_DEBUG_LOG(msg, ...)
   #define _LIBUNWIND_TRACE_API(msg, ...)
-  #define _LIBUNWIND_TRACING_UNWINDING (0)
-  #define _LIBUNWIND_TRACING_DWARF (0)
+  #define _LIBUNWIND_TRACING_UNWINDING 0
   #define _LIBUNWIND_TRACE_UNWINDING(msg, ...)
-  #define _LIBUNWIND_TRACE_DWARF(...)
+  #define _LIBUNWIND_LOG_NON_ZERO(x) x
 #else
   #ifdef __cplusplus
     extern "C" {
   #endif
     extern  bool logAPIs();
     extern  bool logUnwinding();
-    extern  bool logDWARF();
   #ifdef __cplusplus
     }
   #endif
   #define _LIBUNWIND_DEBUG_LOG(msg, ...)  _LIBUNWIND_LOG(msg, __VA_ARGS__)
-  #define _LIBUNWIND_TRACE_API(msg, ...)                                       \
-    do {                                                                       \
-      if (logAPIs())                                                           \
-        _LIBUNWIND_LOG(msg, __VA_ARGS__);                                      \
-    } while (0)
+  #define _LIBUNWIND_LOG_NON_ZERO(x) \
+            do { \
+              int _err = x; \
+              if ( _err != 0 ) \
+                _LIBUNWIND_LOG("" #x "=%d in %s", _err, __FUNCTION__); \
+             } while (0)
+  #define _LIBUNWIND_TRACE_API(msg, ...) \
+            do { \
+              if ( logAPIs() ) _LIBUNWIND_LOG(msg, __VA_ARGS__); \
+            } while(0)
+  #define _LIBUNWIND_TRACE_UNWINDING(msg, ...) \
+            do { \
+              if ( logUnwinding() ) _LIBUNWIND_LOG(msg, __VA_ARGS__); \
+            } while(0)
   #define _LIBUNWIND_TRACING_UNWINDING logUnwinding()
-  #define _LIBUNWIND_TRACING_DWARF logDWARF()
-  #define _LIBUNWIND_TRACE_UNWINDING(msg, ...)                                 \
-    do {                                                                       \
-      if (logUnwinding())                                                      \
-        _LIBUNWIND_LOG(msg, __VA_ARGS__);                                      \
-    } while (0)
-  #define _LIBUNWIND_TRACE_DWARF(...)                                          \
-    do {                                                                       \
-      if (logDWARF())                                                          \
-        fprintf(stderr, __VA_ARGS__);                                          \
-    } while (0)
 #endif
 
 #ifdef __cplusplus
@@ -165,7 +125,7 @@
 #if defined(_LIBUNWIND_IS_NATIVE_ONLY)
 # define COMP_OP ==
 #else
-# define COMP_OP <=
+# define COMP_OP <
 #endif
 template <typename _Type, typename _Mem>
 struct check_fit {