1 files changed, 332 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/Headers/unwind.h b/contrib/llvm-project/clang/lib/Headers/unwind.h
new file mode 100644
index 000000000000..33e1792cd1fb
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Headers/unwind.h
@@ -0,0 +1,332 @@
+/*===---- unwind.h - Stack unwinding ----------------------------------------===
+ *
+ * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+ * See https://llvm.org/LICENSE.txt for license information.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ *
+ *===-----------------------------------------------------------------------===
+ */
+
+/* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
+
+#ifndef __CLANG_UNWIND_H
+#define __CLANG_UNWIND_H
+
+#if defined(__APPLE__) && __has_include_next(<unwind.h>)
+/* Darwin (from 11.x on) provide an unwind.h. If that's available,
+ * use it. libunwind wraps some of its definitions in #ifdef _GNU_SOURCE,
+ * so define that around the include.*/
+# ifndef _GNU_SOURCE
+#  define _SHOULD_UNDEFINE_GNU_SOURCE
+#  define _GNU_SOURCE
+# endif
+// libunwind's unwind.h reflects the current visibility.  However, Mozilla
+// builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the
+// visibility to default and export its contents.  gcc also allows users to
+// override its override by #defining HIDE_EXPORTS (but note, this only obeys
+// the user's -fvisibility setting; it doesn't hide any exports on its own).  We
+// imitate gcc's header here:
+# ifdef HIDE_EXPORTS
+#  include_next <unwind.h>
+# else
+#  pragma GCC visibility push(default)
+#  include_next <unwind.h>
+#  pragma GCC visibility pop
+# endif
+# ifdef _SHOULD_UNDEFINE_GNU_SOURCE
+#  undef _GNU_SOURCE
+#  undef _SHOULD_UNDEFINE_GNU_SOURCE
+# endif
+#else
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* It is a bit strange for a header to play with the visibility of the
+   symbols it declares, but this matches gcc's behavior and some programs
+   depend on it */
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility push(default)
+#endif
+
+typedef uintptr_t _Unwind_Word __attribute__((__mode__(__unwind_word__)));
+typedef intptr_t _Unwind_Sword __attribute__((__mode__(__unwind_word__)));
+typedef uintptr_t _Unwind_Ptr;
+typedef uintptr_t _Unwind_Internal_Ptr;
+typedef uint64_t _Unwind_Exception_Class;
+
+typedef intptr_t _sleb128_t;
+typedef uintptr_t _uleb128_t;
+
+struct _Unwind_Context;
+#if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) || \
+                          defined(__ARM_DWARF_EH__) || defined(__SEH__))
+struct _Unwind_Control_Block;
+typedef struct _Unwind_Control_Block _Unwind_Control_Block;
+#define _Unwind_Exception _Unwind_Control_Block /* Alias */
+#else
+struct _Unwind_Exception;
+typedef struct _Unwind_Exception _Unwind_Exception;
+#endif
+typedef enum {
+  _URC_NO_REASON = 0,
+#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
+    !defined(__ARM_DWARF_EH__) && !defined(__SEH__)
+  _URC_OK = 0, /* used by ARM EHABI */
+#endif
+  _URC_FOREIGN_EXCEPTION_CAUGHT = 1,
+
+  _URC_FATAL_PHASE2_ERROR = 2,
+  _URC_FATAL_PHASE1_ERROR = 3,
+  _URC_NORMAL_STOP = 4,
+
+  _URC_END_OF_STACK = 5,
+  _URC_HANDLER_FOUND = 6,
+  _URC_INSTALL_CONTEXT = 7,
+  _URC_CONTINUE_UNWIND = 8,
+#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
+    !defined(__ARM_DWARF_EH__) && !defined(__SEH__)
+  _URC_FAILURE = 9 /* used by ARM EHABI */
+#endif
+} _Unwind_Reason_Code;
+
+typedef enum {
+  _UA_SEARCH_PHASE = 1,
+  _UA_CLEANUP_PHASE = 2,
+
+  _UA_HANDLER_FRAME = 4,
+  _UA_FORCE_UNWIND = 8,
+  _UA_END_OF_STACK = 16 /* gcc extension to C++ ABI */
+} _Unwind_Action;
+
+typedef void (*_Unwind_Exception_Cleanup_Fn)(_Unwind_Reason_Code,
+                                             _Unwind_Exception *);
+
+#if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) || \
+                          defined(__ARM_DWARF_EH__) || defined(__SEH__))
+typedef struct _Unwind_Control_Block _Unwind_Control_Block;
+typedef uint32_t _Unwind_EHT_Header;
+
+struct _Unwind_Control_Block {
+  uint64_t exception_class;
+  void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block *);
+  /* unwinder cache (private fields for the unwinder's use) */
+  struct {
+    uint32_t reserved1; /* forced unwind stop function, 0 if not forced */
+    uint32_t reserved2; /* personality routine */
+    uint32_t reserved3; /* callsite */
+    uint32_t reserved4; /* forced unwind stop argument */
+    uint32_t reserved5;
+  } unwinder_cache;
+  /* propagation barrier cache (valid after phase 1) */
+  struct {
+    uint32_t sp;
+    uint32_t bitpattern[5];
+  } barrier_cache;
+  /* cleanup cache (preserved over cleanup) */
+  struct {
+    uint32_t bitpattern[4];
+  } cleanup_cache;
+  /* personality cache (for personality's benefit) */
+  struct {
+    uint32_t fnstart;         /* function start address */
+    _Unwind_EHT_Header *ehtp; /* pointer to EHT entry header word */
+    uint32_t additional;      /* additional data */
+    uint32_t reserved1;
+  } pr_cache;
+  long long int : 0; /* force alignment of next item to 8-byte boundary */
+} __attribute__((__aligned__(8)));
+#else
+struct _Unwind_Exception {
+  _Unwind_Exception_Class exception_class;
+  _Unwind_Exception_Cleanup_Fn exception_cleanup;
+#if !defined (__USING_SJLJ_EXCEPTIONS__) && defined (__SEH__)
+  _Unwind_Word private_[6];
+#else
+  _Unwind_Word private_1;
+  _Unwind_Word private_2;
+#endif
+  /* The Itanium ABI requires that _Unwind_Exception objects are "double-word
+   * aligned".  GCC has interpreted this to mean "use the maximum useful
+   * alignment for the target"; so do we. */
+} __attribute__((__aligned__));
+#endif
+
+typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)(int, _Unwind_Action,
+                                               _Unwind_Exception_Class,
+                                               _Unwind_Exception *,
+                                               struct _Unwind_Context *,
+                                               void *);
+
+typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(int, _Unwind_Action,
+                                                      _Unwind_Exception_Class,
+                                                      _Unwind_Exception *,
+                                                      struct _Unwind_Context *);
+typedef _Unwind_Personality_Fn __personality_routine;
+
+typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context *,
+                                                void *);
+
+#if defined(__arm__) && !(defined(__USING_SJLJ_EXCEPTIONS__) ||                \
+                          defined(__ARM_DWARF_EH__) || defined(__SEH__))
+typedef enum {
+  _UVRSC_CORE = 0,        /* integer register */
+  _UVRSC_VFP = 1,         /* vfp */
+  _UVRSC_WMMXD = 3,       /* Intel WMMX data register */
+  _UVRSC_WMMXC = 4,       /* Intel WMMX control register */
+  _UVRSC_PSEUDO = 5       /* Special purpose pseudo register */
+} _Unwind_VRS_RegClass;
+
+typedef enum {
+  _UVRSD_UINT32 = 0,
+  _UVRSD_VFPX = 1,
+  _UVRSD_UINT64 = 3,
+  _UVRSD_FLOAT = 4,
+  _UVRSD_DOUBLE = 5
+} _Unwind_VRS_DataRepresentation;
+
+typedef enum {
+  _UVRSR_OK = 0,
+  _UVRSR_NOT_IMPLEMENTED = 1,
+  _UVRSR_FAILED = 2
+} _Unwind_VRS_Result;
+
+typedef uint32_t _Unwind_State;
+#define _US_VIRTUAL_UNWIND_FRAME  ((_Unwind_State)0)
+#define _US_UNWIND_FRAME_STARTING ((_Unwind_State)1)
+#define _US_UNWIND_FRAME_RESUME   ((_Unwind_State)2)
+#define _US_ACTION_MASK           ((_Unwind_State)3)
+#define _US_FORCE_UNWIND          ((_Unwind_State)8)
+
+_Unwind_VRS_Result _Unwind_VRS_Get(struct _Unwind_Context *__context,
+  _Unwind_VRS_RegClass __regclass,
+  uint32_t __regno,
+  _Unwind_VRS_DataRepresentation __representation,
+  void *__valuep);
+
+_Unwind_VRS_Result _Unwind_VRS_Set(struct _Unwind_Context *__context,
+  _Unwind_VRS_RegClass __regclass,
+  uint32_t __regno,
+  _Unwind_VRS_DataRepresentation __representation,
+  void *__valuep);
+
+static __inline__
+_Unwind_Word _Unwind_GetGR(struct _Unwind_Context *__context, int __index) {
+  _Unwind_Word __value;
+  _Unwind_VRS_Get(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value);
+  return __value;
+}
+
+static __inline__
+void _Unwind_SetGR(struct _Unwind_Context *__context, int __index,
+                   _Unwind_Word __value) {
+  _Unwind_VRS_Set(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value);
+}
+
+static __inline__
+_Unwind_Word _Unwind_GetIP(struct _Unwind_Context *__context) {
+  _Unwind_Word __ip = _Unwind_GetGR(__context, 15);
+  return __ip & ~(_Unwind_Word)(0x1); /* Remove thumb mode bit. */
+}
+
+static __inline__
+void _Unwind_SetIP(struct _Unwind_Context *__context, _Unwind_Word __value) {
+  _Unwind_Word __thumb_mode_bit = _Unwind_GetGR(__context, 15) & 0x1;
+  _Unwind_SetGR(__context, 15, __value | __thumb_mode_bit);
+}
+#else
+_Unwind_Word _Unwind_GetGR(struct _Unwind_Context *, int);
+void _Unwind_SetGR(struct _Unwind_Context *, int, _Unwind_Word);
+
+_Unwind_Word _Unwind_GetIP(struct _Unwind_Context *);
+void _Unwind_SetIP(struct _Unwind_Context *, _Unwind_Word);
+#endif
+
+
+_Unwind_Word _Unwind_GetIPInfo(struct _Unwind_Context *, int *);
+
+_Unwind_Word _Unwind_GetCFA(struct _Unwind_Context *);
+
+_Unwind_Word _Unwind_GetBSP(struct _Unwind_Context *);
+
+void *_Unwind_GetLanguageSpecificData(struct _Unwind_Context *);
+
+_Unwind_Ptr _Unwind_GetRegionStart(struct _Unwind_Context *);
+
+/* DWARF EH functions; currently not available on Darwin/ARM */
+#if !defined(__APPLE__) || !defined(__arm__)
+_Unwind_Reason_Code _Unwind_RaiseException(_Unwind_Exception *);
+_Unwind_Reason_Code _Unwind_ForcedUnwind(_Unwind_Exception *, _Unwind_Stop_Fn,
+                                         void *);
+void _Unwind_DeleteException(_Unwind_Exception *);
+void _Unwind_Resume(_Unwind_Exception *);
+_Unwind_Reason_Code _Unwind_Resume_or_Rethrow(_Unwind_Exception *);
+
+#endif
+
+_Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void *);
+
+/* setjmp(3)/longjmp(3) stuff */
+typedef struct SjLj_Function_Context *_Unwind_FunctionContext_t;
+
+void _Unwind_SjLj_Register(_Unwind_FunctionContext_t);
+void _Unwind_SjLj_Unregister(_Unwind_FunctionContext_t);
+_Unwind_Reason_Code _Unwind_SjLj_RaiseException(_Unwind_Exception *);
+_Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind(_Unwind_Exception *,
+                                              _Unwind_Stop_Fn, void *);
+void _Unwind_SjLj_Resume(_Unwind_Exception *);
+_Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow(_Unwind_Exception *);
+
+void *_Unwind_FindEnclosingFunction(void *);
+
+#ifdef __APPLE__
+
+_Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *)
+    __attribute__((__unavailable__));
+_Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *)
+    __attribute__((__unavailable__));
+
+/* Darwin-specific functions */
+void __register_frame(const void *);
+void __deregister_frame(const void *);
+
+struct dwarf_eh_bases {
+  uintptr_t tbase;
+  uintptr_t dbase;
+  uintptr_t func;
+};
+void *_Unwind_Find_FDE(const void *, struct dwarf_eh_bases *);
+
+void __register_frame_info_bases(const void *, void *, void *, void *)
+  __attribute__((__unavailable__));
+void __register_frame_info(const void *, void *) __attribute__((__unavailable__));
+void __register_frame_info_table_bases(const void *, void*, void *, void *)
+  __attribute__((__unavailable__));
+void __register_frame_info_table(const void *, void *)
+  __attribute__((__unavailable__));
+void __register_frame_table(const void *) __attribute__((__unavailable__));
+void __deregister_frame_info(const void *) __attribute__((__unavailable__));
+void __deregister_frame_info_bases(const void *)__attribute__((__unavailable__));
+
+#else
+
+_Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *);
+_Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *);
+
+#endif
+
+
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility pop
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+#endif /* __CLANG_UNWIND_H */