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libunwind: Implement the unw_strerror function for better nongnu libunwind compatibility #160887

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libunwind: Implement the unw_strerror function for better nongnu libunwind compatibility #160887

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1 change: 1 addition & 0 deletions libunwind/include/libunwind.h
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Original file line number Diff line number Diff line change
Expand Up @@ -130,6 +130,7 @@ extern int unw_is_fpreg(unw_cursor_t *, unw_regnum_t) LIBUNWIND_AVAIL;
extern int unw_is_signal_frame(unw_cursor_t *) LIBUNWIND_AVAIL;
extern int unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *) LIBUNWIND_AVAIL;
//extern int unw_get_save_loc(unw_cursor_t*, int, unw_save_loc_t*);
extern const char *unw_strerror(int) LIBUNWIND_AVAIL;

extern unw_addr_space_t unw_local_addr_space;

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35 changes: 35 additions & 0 deletions libunwind/src/libunwind.cpp
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Expand Up @@ -347,6 +347,41 @@ void __unw_remove_dynamic_eh_frame_section(unw_word_t eh_frame_start) {
}

#endif // defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)

/// Maps the UNW_* error code to a textual representation
_LIBUNWIND_HIDDEN const char *__unw_strerror(int error_code) {
switch (error_code) {
case UNW_ESUCCESS:
return "no error";
case UNW_EUNSPEC:
return "unspecified (general) error";
case UNW_ENOMEM:
return "out of memory";
case UNW_EBADREG:
return "bad register number";
case UNW_EREADONLYREG:
return "attempt to write read-only register";
case UNW_ESTOPUNWIND:
return "stop unwinding";
case UNW_EINVALIDIP:
return "invalid IP";
case UNW_EBADFRAME:
return "bad frame";
case UNW_EINVAL:
return "unsupported operation or bad value";
case UNW_EBADVERSION:
return "unwind info has unsupported version";
case UNW_ENOINFO:
return "no unwind info found";
#if defined(_LIBUNWIND_TARGET_AARCH64) && !defined(_LIBUNWIND_IS_NATIVE_ONLY)
case UNW_ECROSSRASIGNING:
return "return address require authentication";
#endif
}
return "invalid error code";
}
_LIBUNWIND_WEAK_ALIAS(__unw_strerror, unw_strerror)

#endif // !defined(__USING_SJLJ_EXCEPTIONS__) && !defined(__wasm__)

#ifdef __APPLE__
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1 change: 1 addition & 0 deletions libunwind/src/libunwind_ext.h
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Expand Up @@ -42,6 +42,7 @@ extern int __unw_get_proc_info(unw_cursor_t *, unw_proc_info_t *);
extern int __unw_is_fpreg(unw_cursor_t *, unw_regnum_t);
extern int __unw_is_signal_frame(unw_cursor_t *);
extern int __unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *);
extern const char *__unw_strerror(int);

#if defined(_AIX)
extern uintptr_t __unw_get_data_rel_base(unw_cursor_t *);
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