diff options
Diffstat (limited to 'libctf/ctf-error.c')
| -rw-r--r-- | libctf/ctf-error.c | 99 |
1 files changed, 41 insertions, 58 deletions
diff --git a/libctf/ctf-error.c b/libctf/ctf-error.c index c457aa0..84d14d5 100644 --- a/libctf/ctf-error.c +++ b/libctf/ctf-error.c @@ -18,71 +18,54 @@ <http://www.gnu.org/licenses/>. */ #include <ctf-impl.h> +#include <stddef.h> -static const char *const _ctf_errlist[] = { - "File is not in CTF or ELF format", /* ECTF_FMT */ - "BFD error", /* ECTF_BFDERR */ - "File uses more recent CTF version than libctf", /* ECTF_CTFVERS */ - "Ambiguous BFD target", /* ECTF_BFD_AMBIGUOUS */ - "Symbol table uses invalid entry size", /* ECTF_SYMTAB */ - "Symbol table data buffer is not valid", /* ECTF_SYMBAD */ - "String table data buffer is not valid", /* ECTF_STRBAD */ - "File data structure corruption detected", /* ECTF_CORRUPT */ - "File does not contain CTF data", /* ECTF_NOCTFDATA */ - "Buffer does not contain CTF data", /* ECTF_NOCTFBUF */ - "Symbol table information is not available", /* ECTF_NOSYMTAB */ - "Type information is in parent and unavailable", /* ECTF_NOPARENT */ - "Cannot import types with different data model", /* ECTF_DMODEL */ - "File added to link too late", /* ECTF_LINKADDEDLATE */ - "Failed to allocate (de)compression buffer", /* ECTF_ZALLOC */ - "Failed to decompress CTF data", /* ECTF_DECOMPRESS */ - "External string table is not available", /* ECTF_STRTAB */ - "String name offset is corrupt", /* ECTF_BADNAME */ - "Invalid type identifier", /* ECTF_BADID */ - "Type is not a struct or union", /* ECTF_NOTSOU */ - "Type is not an enum", /* ECTF_NOTENUM */ - "Type is not a struct, union, or enum", /* ECTF_NOTSUE */ - "Type is not an integer, float, or enum", /* ECTF_NOTINTFP */ - "Type is not an array", /* ECTF_NOTARRAY */ - "Type does not reference another type", /* ECTF_NOTREF */ - "Input buffer is too small for type name", /* ECTF_NAMELEN */ - "No type information available for that name", /* ECTF_NOTYPE */ - "Syntax error in type name", /* ECTF_SYNTAX */ - "Symbol table entry or type is not a function", /* ECTF_NOTFUNC */ - "No function information available for symbol", /* ECTF_NOFUNCDAT */ - "Symbol table entry is not a data object", /* ECTF_NOTDATA */ - "No type information available for symbol", /* ECTF_NOTYPEDAT */ - "No label information available for that name", /* ECTF_NOLABEL */ - "File does not contain any labels", /* ECTF_NOLABELDATA */ - "Feature not supported", /* ECTF_NOTSUP */ - "Invalid enum element name", /* ECTF_NOENUMNAM */ - "Invalid member name", /* ECTF_NOMEMBNAM */ - "CTF container is read-only", /* ECTF_RDONLY */ - "Limit on number of dynamic type members reached", /* ECTF_DTFULL */ - "Limit on number of dynamic types reached", /* ECTF_FULL */ - "Duplicate member or variable name", /* ECTF_DUPLICATE */ - "Conflicting type is already defined", /* ECTF_CONFLICT */ - "Attempt to roll back past a ctf_update", /* ECTF_OVERROLLBACK */ - "Failed to compress CTF data", /* ECTF_COMPRESS */ - "Failed to create CTF archive", /* ECTF_ARCREATE */ - "Name not found in CTF archive", /* ECTF_ARNNAME */ - "Overflow of type bitness or offset in slice", /* ECTF_SLICEOVERFLOW */ - "Unknown section number in dump", /* ECTF_DUMPSECTUNKNOWN */ - "Section changed in middle of dump", /* ECTF_DUMPSECTCHANGED */ - "Feature not yet implemented", /* ECTF_NOTYET */ - "Internal error in link", /* ECTF_INTERNAL */ - "Type not representable in CTF" /* ECTF_NONREPRESENTABLE */ -}; - -static const int _ctf_nerr = sizeof (_ctf_errlist) / sizeof (_ctf_errlist[0]); +/* This construct is due to Bruno Haible: much thanks. */ + +/* Give each structure member a unique name. The name does not matter, so we + use the line number in ctf-error.h to uniquify them. */ + +#define ERRSTRFIELD(line) ERRSTRFIELD1 (line) +#define ERRSTRFIELD1(line) ctf_errstr##line + +/* The error message strings, each in a unique structure member precisely big + enough for that error, plus a str member to access them all as a string + table. */ + +static const union _ctf_errlist_t +{ + __extension__ struct + { +#define _CTF_STR(n, s) char ERRSTRFIELD (__LINE__) [sizeof (s)]; +#include "ctf-error.h" +#undef _CTF_STR + }; + char str[1]; +} _ctf_errlist = + { + { +#define _CTF_STR(n, s) s, +#include "ctf-error.h" +#undef _CTF_STR + } + }; + +/* Offsets to each member in the string table, computed using offsetof. */ + +static const unsigned int _ctf_erridx[] = + { +#define _CTF_STR(n, s) [n - ECTF_BASE] = offsetof (union _ctf_errlist_t, ERRSTRFIELD (__LINE__)), +#include "ctf-error.h" +#undef _CTF_STR + }; const char * ctf_errmsg (int error) { const char *str; - if (error >= ECTF_BASE && (error - ECTF_BASE) < _ctf_nerr) - str = _ctf_errlist[error - ECTF_BASE]; + if (error >= ECTF_BASE && (error - ECTF_BASE) < ECTF_NERR) + str = _ctf_errlist.str + _ctf_erridx[error - ECTF_BASE]; else str = ctf_strerror (error); |