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cosmopolitan/third_party/libunwind/config.h
Trung Nguyen b09096691a
third_party: Add libunwind (#1053) 
Added libunwind from LLVM 17.0.6.
The library includes functions required for C++ exception handling.
2024-01-06 15:04:30 +07:00

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//===----------------------------------------------------------------------===//
//
// 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
//
//
// Defines macros used within libunwind project.
//
//===----------------------------------------------------------------------===//
#ifndef LIBUNWIND_CONFIG_H
#define LIBUNWIND_CONFIG_H
#include "libc/isystem/assert.h"
#include "libc/stdio/stdio.h"
#include "libc/isystem/stdint.h"
#include "libc/isystem/stdlib.h"
#include "third_party/libunwind/include/__libunwind_config.h"
// Platform specific configuration defines.
#ifdef __APPLE__
#if defined(FOR_DYLD)
#define _LIBUNWIND_SUPPORT_COMPACT_UNWIND 1
#else
#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
#endif
#elif defined(_LIBUNWIND_IS_BAREMETAL)
#if !defined(_LIBUNWIND_ARM_EHABI)
#define _LIBUNWIND_SUPPORT_DWARF_UNWIND 1
#define _LIBUNWIND_SUPPORT_DWARF_INDEX 1
#endif
#elif defined(__BIONIC__) && defined(_LIBUNWIND_ARM_EHABI)
// For ARM EHABI, Bionic didn't implement dl_iterate_phdr until API 21. After
// API 21, dl_iterate_phdr exists, but dl_unwind_find_exidx is much faster.
#define _LIBUNWIND_USE_DL_UNWIND_FIND_EXIDX 1
#elif defined(_AIX)
// The traceback table at the end of each function is used for unwinding.
#define _LIBUNWIND_SUPPORT_TBTAB_UNWIND 1
#else
// Assume an ELF system with a dl_iterate_phdr function.
#define _LIBUNWIND_USE_DL_ITERATE_PHDR 1
#if !defined(_LIBUNWIND_ARM_EHABI)
#define _LIBUNWIND_SUPPORT_DWARF_UNWIND 1
#define _LIBUNWIND_SUPPORT_DWARF_INDEX 1
#endif
#endif
#if defined(_LIBUNWIND_HIDE_SYMBOLS)
// The CMake file passes -fvisibility=hidden to control ELF/Mach-O visibility.
#define _LIBUNWIND_EXPORT
#define _LIBUNWIND_HIDDEN
#else
#if !defined(__ELF__) && !defined(__MACH__) && !defined(_AIX)
#define _LIBUNWIND_EXPORT __declspec(dllexport)
#define _LIBUNWIND_HIDDEN
#else
#define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
#define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
#endif
#endif
#define STR(a) #a
#define XSTR(a) STR(a)
#define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name
#if defined(__APPLE__)
#if defined(_LIBUNWIND_HIDE_SYMBOLS)
#define _LIBUNWIND_ALIAS_VISIBILITY(name) __asm__(".private_extern " name);
#else
#define _LIBUNWIND_ALIAS_VISIBILITY(name)
#endif
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
__asm__(".globl " SYMBOL_NAME(aliasname)); \
__asm__(SYMBOL_NAME(aliasname) " = " SYMBOL_NAME(name)); \
_LIBUNWIND_ALIAS_VISIBILITY(SYMBOL_NAME(aliasname))
#elif defined(__ELF__) || defined(_AIX)
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
extern "C" _LIBUNWIND_EXPORT __typeof(name) aliasname \
__attribute__((weak, alias(#name)));
#elif defined(_WIN32)
#if defined(__MINGW32__)
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
extern "C" _LIBUNWIND_EXPORT __typeof(name) aliasname \
__attribute__((alias(#name)));
#else
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
__pragma(comment(linker, "/alternatename:" SYMBOL_NAME(aliasname) "=" \
SYMBOL_NAME(name))) \
extern "C" _LIBUNWIND_EXPORT __typeof(name) aliasname;
#endif
#else
#error Unsupported target
#endif
// Apple/armv7k defaults to DWARF/Compact unwinding, but its libunwind also
// needs to include the SJLJ APIs.
#if (defined(__APPLE__) && defined(__arm__)) || defined(__USING_SJLJ_EXCEPTIONS__)
#define _LIBUNWIND_BUILD_SJLJ_APIS
#endif
#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__)
#define _LIBUNWIND_SUPPORT_FRAME_APIS
#endif
#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__) || \
(!defined(__APPLE__) && defined(__arm__)) || defined(__aarch64__) || \
defined(__mips__) || defined(__riscv) || defined(__hexagon__) || \
defined(__sparc__) || defined(__s390x__) || defined(__loongarch__)
#if !defined(_LIBUNWIND_BUILD_SJLJ_APIS)
#define _LIBUNWIND_BUILD_ZERO_COST_APIS
#endif
#endif
#ifndef _LIBUNWIND_REMEMBER_HEAP_ALLOC
#if defined(_LIBUNWIND_REMEMBER_STACK_ALLOC) || defined(__APPLE__) || \
defined(__linux__) || defined(__ANDROID__) || defined(__MINGW32__) || \
defined(_LIBUNWIND_IS_BAREMETAL)
#define _LIBUNWIND_REMEMBER_ALLOC(_size) alloca(_size)
#define _LIBUNWIND_REMEMBER_FREE(_ptr) \
do { \
} while (0)
#elif defined(_WIN32)
#define _LIBUNWIND_REMEMBER_ALLOC(_size) _malloca(_size)
#define _LIBUNWIND_REMEMBER_FREE(_ptr) _freea(_ptr)
#define _LIBUNWIND_REMEMBER_CLEANUP_NEEDED
#else
#define _LIBUNWIND_REMEMBER_ALLOC(_size) malloc(_size)
#define _LIBUNWIND_REMEMBER_FREE(_ptr) free(_ptr)
#define _LIBUNWIND_REMEMBER_CLEANUP_NEEDED
#endif
#else /* _LIBUNWIND_REMEMBER_HEAP_ALLOC */
#define _LIBUNWIND_REMEMBER_ALLOC(_size) malloc(_size)
#define _LIBUNWIND_REMEMBER_FREE(_ptr) free(_ptr)
#define _LIBUNWIND_REMEMBER_CLEANUP_NEEDED
#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\n", __func__, msg); \
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) do { \
fprintf(stderr, "libunwind: " msg "\n"); \
fflush(stderr); \
} while (0)
#define _LIBUNWIND_LOG(msg, ...) do { \
fprintf(stderr, "libunwind: " msg "\n", __VA_ARGS__); \
fflush(stderr); \
} while (0)
#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
// 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_TRACE_UNWINDING(msg, ...)
#define _LIBUNWIND_TRACE_DWARF(...)
#else
#ifdef __cplusplus
extern "C" {
#endif
extern bool logAPIs(void);
extern bool logUnwinding(void);
extern bool logDWARF(void);
#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_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
// Used to fit UnwindCursor and Registers_xxx types against unw_context_t /
// unw_cursor_t sized memory blocks.
#if defined(_LIBUNWIND_IS_NATIVE_ONLY)
# define COMP_OP ==
#else
# define COMP_OP <=
#endif
template <typename _Type, typename _Mem>
struct check_fit {
template <typename T>
struct blk_count {
static const size_t count =
(sizeof(T) + sizeof(uint64_t) - 1) / sizeof(uint64_t);
};
static const bool does_fit =
(blk_count<_Type>::count COMP_OP blk_count<_Mem>::count);
};
#undef COMP_OP
#endif // __cplusplus
#endif // LIBUNWIND_CONFIG_H
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