Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===----------------------------------------------------------------------===//

//

// 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

//

//

// C++ ABI Level 1 ABI documented at:

//   https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html

//

//===----------------------------------------------------------------------===//

#ifndef __UNWIND_H__

#define __UNWIND_H__

#include <__libunwind_config.h>

#include <stdint.h>

#include <stddef.h>

#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__) && defined(_WIN32)

#include <windows.h>

#include <ntverp.h>

#endif

#if defined(__APPLE__)

#define LIBUNWIND_UNAVAIL __attribute__ (( unavailable ))

#else

#define LIBUNWIND_UNAVAIL

#endif

typedef enum {

  _URC_NO_REASON = 0,

  _URC_OK = 0,

  _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(_LIBUNWIND_ARM_EHABI)

  _URC_FAILURE = 9

#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 struct _Unwind_Context _Unwind_Context;   // opaque

#if defined(_LIBUNWIND_ARM_EHABI)

#include <unwind_arm_ehabi.h>

#else

#include <unwind_itanium.h>

#endif

typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)

    (int version,

     _Unwind_Action actions,

     _Unwind_Exception_Class exceptionClass,

     _Unwind_Exception* exceptionObject,

     struct _Unwind_Context* context,

     void* stop_parameter);

#ifdef __cplusplus

extern "C" {

#endif

extern uintptr_t _Unwind_GetRegionStart(struct _Unwind_Context *context);

extern uintptr_t

    _Unwind_GetLanguageSpecificData(struct _Unwind_Context *context);

#ifdef __USING_SJLJ_EXCEPTIONS__

extern _Unwind_Reason_Code

    _Unwind_SjLj_ForcedUnwind(_Unwind_Exception *exception_object,

                              _Unwind_Stop_Fn stop, void *stop_parameter);

#else

extern _Unwind_Reason_Code

    _Unwind_ForcedUnwind(_Unwind_Exception *exception_object,

                         _Unwind_Stop_Fn stop, void *stop_parameter);

#endif

#ifdef __USING_SJLJ_EXCEPTIONS__

typedef struct _Unwind_FunctionContext *_Unwind_FunctionContext_t;

extern void _Unwind_SjLj_Register(_Unwind_FunctionContext_t fc);

extern void _Unwind_SjLj_Unregister(_Unwind_FunctionContext_t fc);

#endif

//

// The following are semi-supported extensions to the C++ ABI

//

//

//  called by __cxa_rethrow().

//

#ifdef __USING_SJLJ_EXCEPTIONS__

extern _Unwind_Reason_Code

    _Unwind_SjLj_Resume_or_Rethrow(_Unwind_Exception *exception_object);

#else

extern _Unwind_Reason_Code

    _Unwind_Resume_or_Rethrow(_Unwind_Exception *exception_object);

#endif

// _Unwind_Backtrace() is a gcc extension that walks the stack and calls the

// _Unwind_Trace_Fn once per frame until it reaches the bottom of the stack

// or the _Unwind_Trace_Fn function returns something other than _URC_NO_REASON.

typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context *,

                                                void *);

extern _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void *);

// _Unwind_GetCFA is a gcc extension that can be called from within a

// personality handler to get the CFA (stack pointer before call) of

// current frame.

extern uintptr_t _Unwind_GetCFA(struct _Unwind_Context *);

// _Unwind_GetIPInfo is a gcc extension that can be called from within a

// personality handler.  Similar to _Unwind_GetIP() but also returns in

// *ipBefore a non-zero value if the instruction pointer is at or before the

// instruction causing the unwind. Normally, in a function call, the IP returned

// is the return address which is after the call instruction and may be past the

// end of the function containing the call instruction.

extern uintptr_t _Unwind_GetIPInfo(struct _Unwind_Context *context,

                                   int *ipBefore);

// __register_frame() is used with dynamically generated code to register the

// FDE for a generated (JIT) code.  The FDE must use pc-rel addressing to point

// to its function and optional LSDA.

// __register_frame() has existed in all versions of Mac OS X, but in 10.4 and

// 10.5 it was buggy and did not actually register the FDE with the unwinder.

// In 10.6 and later it does register properly.

extern void __register_frame(const void *fde);

extern void __deregister_frame(const void *fde);

// _Unwind_Find_FDE() will locate the FDE if the pc is in some function that has

// an associated FDE. Note, Mac OS X 10.6 and later, introduces "compact unwind

// info" which the runtime uses in preference to DWARF unwind info.  This

// function will only work if the target function has an FDE but no compact

// unwind info.

struct dwarf_eh_bases {

  uintptr_t tbase;

  uintptr_t dbase;

  uintptr_t func;

};

extern const void *_Unwind_Find_FDE(const void *pc, struct dwarf_eh_bases *);

// This function attempts to find the start (address of first instruction) of

// a function given an address inside the function.  It only works if the

// function has an FDE (DWARF unwind info).

// This function is unimplemented on Mac OS X 10.6 and later.  Instead, use

// _Unwind_Find_FDE() and look at the dwarf_eh_bases.func result.

extern void *_Unwind_FindEnclosingFunction(void *pc);

// Mac OS X does not support text-rel and data-rel addressing so these functions

// are unimplemented.

extern uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context *context)

    LIBUNWIND_UNAVAIL;

extern uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context *context)

    LIBUNWIND_UNAVAIL;

// Mac OS X 10.4 and 10.5 had implementations of these functions in

// libgcc_s.dylib, but they never worked.

/// These functions are no longer available on Mac OS X.

extern void __register_frame_info_bases(const void *fde, void *ob, void *tb,

                                        void *db) LIBUNWIND_UNAVAIL;

extern void __register_frame_info(const void *fde, void *ob)

    LIBUNWIND_UNAVAIL;

extern void __register_frame_info_table_bases(const void *fde, void *ob,

                                              void *tb, void *db)

    LIBUNWIND_UNAVAIL;

extern void __register_frame_info_table(const void *fde, void *ob)

    LIBUNWIND_UNAVAIL;

extern void __register_frame_table(const void *fde)

    LIBUNWIND_UNAVAIL;

extern void *__deregister_frame_info(const void *fde)

    LIBUNWIND_UNAVAIL;

extern void *__deregister_frame_info_bases(const void *fde)

    LIBUNWIND_UNAVAIL;

#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)

#ifndef _WIN32

typedef struct _EXCEPTION_RECORD EXCEPTION_RECORD;

typedef struct _CONTEXT CONTEXT;

typedef struct _DISPATCHER_CONTEXT DISPATCHER_CONTEXT;

#elif !defined(__MINGW32__) && VER_PRODUCTBUILD < 8000

typedef struct _DISPATCHER_CONTEXT DISPATCHER_CONTEXT;

#endif

// This is the common wrapper for GCC-style personality functions with SEH.

extern EXCEPTION_DISPOSITION _GCC_specific_handler(EXCEPTION_RECORD *exc,

                                                   void *frame, CONTEXT *ctx,

                                                   DISPATCHER_CONTEXT *disp,

                                                   _Unwind_Personality_Fn pers);

#endif

#ifdef __cplusplus

}

#endif

#endif // __UNWIND_H__