Dwfl_Module *
dwfl_linemodule (Dwfl_Line *line)
{
if (line == NULL)
return NULL;
return dwfl_linecu (line)->mod;
}
const char *
dwfl_lineinfo (Dwfl_Line *line, Dwarf_Addr *addr, int *linep, int *colp,
Dwarf_Word *mtime, Dwarf_Word *length)
{
if (line == NULL)
return NULL;
struct dwfl_cu *cu = dwfl_linecu (line);
const Dwarf_Line *info = &cu->die.cu->lines->info[line->idx];
if (addr != NULL)
*addr = dwfl_adjusted_dwarf_addr (cu->mod, info->addr);
if (linep != NULL)
*linep = info->line;
if (colp != NULL)
*colp = info->column;
struct Dwarf_Fileinfo_s *file = &info->files->info[info->file];
if (mtime != NULL)
*mtime = file->mtime;
if (length != NULL)
*length = file->length;
return file->name;
}
int
main (int argc, char *argv[])
{
int cnt;
Dwfl *dwfl = NULL;
(void) argp_parse (dwfl_standard_argp (), argc, argv, 0, &cnt, &dwfl);
assert (dwfl != NULL);
Dwarf_Die *cu = NULL;
Dwarf_Addr bias;
do
{
cu = dwfl_nextcu (dwfl, cu, &bias);
if (cu != NULL)
{
Dwfl_Module *mod = dwfl_cumodule (cu);
const char *modname = (dwfl_module_info (mod, NULL, NULL, NULL,
NULL, NULL, NULL, NULL)
?: "<unknown>");
const char *cuname = (dwarf_diename (cu) ?: "<unknown>");
printf ("mod: %s CU: [%" PRIx64 "] %s\n", modname,
dwarf_dieoffset (cu), cuname);
size_t lines;
if (dwfl_getsrclines (cu, &lines) != 0)
continue; // No lines...
for (size_t i = 0; i < lines; i++)
{
Dwfl_Line *line = dwfl_onesrcline (cu, i);
Dwarf_Addr addr;
int lineno;
int colno;
Dwarf_Word mtime;
Dwarf_Word length;
const char *src = dwfl_lineinfo (line, &addr, &lineno, &colno,
&mtime, &length);
Dwarf_Addr dw_bias;
Dwarf_Line *dw_line = dwfl_dwarf_line (line, &dw_bias);
assert (bias == dw_bias);
Dwarf_Addr dw_addr;
if (dwarf_lineaddr (dw_line, &dw_addr) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineaddr: %s",
dwarf_errmsg (-1));
assert (addr == dw_addr + dw_bias);
unsigned int dw_op_index;
if (dwarf_lineop_index (dw_line, &dw_op_index) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineop_index: %s",
dwarf_errmsg (-1));
int dw_lineno;
if (dwarf_lineno (dw_line, &dw_lineno) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineno: %s",
dwarf_errmsg (-1));
assert (lineno == dw_lineno);
int dw_colno;
if (dwarf_linecol (dw_line, &dw_colno) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineno: %s",
dwarf_errmsg (-1));
assert (colno == dw_colno);
bool begin;
if (dwarf_linebeginstatement (dw_line, &begin) != 0)
error (EXIT_FAILURE, 0, "dwarf_linebeginstatement: %s",
dwarf_errmsg (-1));
bool end;
if (dwarf_lineendsequence (dw_line, &end) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineendsequence: %s",
dwarf_errmsg (-1));
bool pend;
if (dwarf_lineprologueend (dw_line, &pend) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineprologueend: %s",
dwarf_errmsg (-1));
bool ebegin;
if (dwarf_lineepiloguebegin (dw_line, &ebegin) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineepiloguebegin: %s",
dwarf_errmsg (-1));
bool block;
if (dwarf_lineblock (dw_line, &block) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineblock: %s",
dwarf_errmsg (-1));
unsigned int isa;
if (dwarf_lineisa (dw_line, &isa) != 0)
error (EXIT_FAILURE, 0, "dwarf_lineisa: %s",
dwarf_errmsg (-1));
unsigned int disc;
if (dwarf_linediscriminator (dw_line, &disc) != 0)
error (EXIT_FAILURE, 0, "dwarf_linediscriminator: %s",
dwarf_errmsg (-1));
const char *dw_src;
Dwarf_Word dw_mtime;
Dwarf_Word dw_length;
dw_src = dwarf_linesrc (dw_line, &dw_mtime, &dw_length);
assert (strcmp (src, dw_src) == 0);
assert (mtime == dw_mtime);
assert (length == dw_length);
printf ("%zd %#" PRIx64 " %s:%d:%d\n"
" time: %#" PRIX64 ", len: %" PRIu64
", idx: %d, b: %d, e: %d"
", pe: %d, eb: %d, block: %d"
", isa: %d, disc: %d\n",
i, addr, src, lineno, colno, mtime, length,
dw_op_index, begin, end, pend, ebegin, block, isa, disc);
Dwarf_Die *linecu = dwfl_linecu (line);
assert (cu == linecu);
Dwfl_Module *linemod = dwfl_linemodule (line);
assert (mod == linemod);
}
}
}
while (cu != NULL);
dwfl_end (dwfl);
return 0;
}
int
dwfl_module_getsrc_file (Dwfl_Module *mod,
const char *fname, int lineno, int column,
Dwfl_Line ***srcsp, size_t *nsrcs)
{
if (mod == NULL)
return -1;
if (mod->dw == NULL)
{
Dwarf_Addr bias;
if (INTUSE(dwfl_module_getdwarf) (mod, &bias) == NULL)
return -1;
}
bool is_basename = strchr (fname, '/') == NULL;
size_t max_match = *nsrcs ?: ~0u;
size_t act_match = *nsrcs;
size_t cur_match = 0;
Dwfl_Line **match = *nsrcs == 0 ? NULL : *srcsp;
struct dwfl_cu *cu = NULL;
Dwfl_Error error;
while ((error = __libdwfl_nextcu (mod, cu, &cu)) == DWFL_E_NOERROR
&& cu != NULL
&& (error = __libdwfl_cu_getsrclines (cu)) == DWFL_E_NOERROR)
{
inline const char *INTUSE(dwarf_line_file) (const Dwarf_Line *line)
{
return line->files->info[line->file].name;
}
inline Dwarf_Line *dwfl_line (const Dwfl_Line *line)
{
return &dwfl_linecu (line)->die.cu->lines->info[line->idx];
}
inline const char *dwfl_line_file (const Dwfl_Line *line)
{
return INTUSE(dwarf_line_file) (dwfl_line (line));
}
/* Search through all the line number records for a matching
file and line/column number. If any of the numbers is zero,
no match is performed. */
const char *lastfile = NULL;
bool lastmatch = false;
for (size_t cnt = 0; cnt < cu->die.cu->lines->nlines; ++cnt)
{
Dwarf_Line *line = &cu->die.cu->lines->info[cnt];
if (unlikely (line->file >= line->files->nfiles))
{
__libdwfl_seterrno (DWFL_E (LIBDW, DWARF_E_INVALID_DWARF));
return -1;
}
else
{
const char *file = INTUSE(dwarf_line_file) (line);
if (file != lastfile)
{
/* Match the name with the name the user provided. */
lastfile = file;
lastmatch = !strcmp (is_basename ? basename (file) : file,
fname);
}
}
if (!lastmatch)
continue;
/* See whether line and possibly column match. */
if (lineno != 0
&& (lineno > line->line
|| (column != 0 && column > line->column)))
/* Cannot match. */
continue;
/* Determine whether this is the best match so far. */
size_t inner;
for (inner = 0; inner < cur_match; ++inner)
if (dwfl_line_file (match[inner])
== INTUSE(dwarf_line_file) (line))
break;
if (inner < cur_match
&& (dwfl_line (match[inner])->line != line->line
|| dwfl_line (match[inner])->line != lineno
|| (column != 0
&& (dwfl_line (match[inner])->column != line->column
|| dwfl_line (match[inner])->column != column))))
{
/* We know about this file already. If this is a better
match for the line number, use it. */
if (dwfl_line (match[inner])->line >= line->line
&& (dwfl_line (match[inner])->line != line->line
|| dwfl_line (match[inner])->column >= line->column))
/* Use the new line. Otherwise the old one. */
match[inner] = &cu->lines->idx[cnt];
continue;
}
if (cur_match < max_match)
{
if (cur_match == act_match)
{
/* Enlarge the array for the results. */
act_match += 10;
Dwfl_Line **newp = realloc (match,
act_match
* sizeof (Dwfl_Line *));
if (newp == NULL)
{
free (match);
__libdwfl_seterrno (DWFL_E_NOMEM);
return -1;
}
match = newp;
}
match[cur_match++] = &cu->lines->idx[cnt];
}
}
}
if (cur_match > 0)
{
assert (*nsrcs == 0 || *srcsp == match);
*nsrcs = cur_match;
*srcsp = match;
return 0;
}
__libdwfl_seterrno (DWFL_E_NO_MATCH);
return -1;
}
static inline Dwarf_Line *
dwfl_line (const Dwfl_Line *line)
{
return &dwfl_linecu (line)->die.cu->lines->info[line->idx];
}
