int
main (int argc, char *argv[])
{
assert (argc >= 3);
const char *name = argv[1];
ptrdiff_t cuoff = strtol (argv[2], NULL, 0);
bool new_style = argc > 3;
int fd = open (name, O_RDONLY);
Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
Dwarf_Die cudie_mem, *cudie = dwarf_offdie (dbg, cuoff, &cudie_mem);
for (ptrdiff_t off = new_style ? DWARF_GETMACROS_START : 0;
(off = dwarf_getmacros (cudie, mac, dbg, off)); )
if (off == -1)
{
puts (dwarf_errmsg (dwarf_errno ()));
break;
}
dwarf_end (dbg);
return 0;
}
/**
* Tries to read DWARF info from the location given by path, and
* attach it to the given bin_info instance if it exists.
*
* @param bin bin_info instance for which to set DWARF info
* @param path Presumed location of the DWARF info
* @returns 0 on success, negative value on failure
*/
static
int bin_info_set_dwarf_info_from_path(struct bin_info *bin, char *path)
{
int fd = -1, ret = 0;
struct bt_dwarf_cu *cu = NULL;
Dwarf *dwarf_info = NULL;
if (!bin || !path) {
goto error;
}
fd = open(path, O_RDONLY);
if (fd < 0) {
fd = -errno;
goto error;
}
dwarf_info = dwarf_begin(fd, DWARF_C_READ);
if (!dwarf_info) {
goto error;
}
/*
* Check if the dwarf info has any CU. If not, the
* executable's object file contains no DWARF info.
*/
cu = bt_dwarf_cu_create(dwarf_info);
if (!cu) {
goto error;
}
ret = bt_dwarf_cu_next(cu);
if (ret) {
goto error;
}
bin->dwarf_fd = fd;
bin->dwarf_path = strdup(path);
if (!bin->dwarf_path) {
goto error;
}
bin->dwarf_info = dwarf_info;
free(cu);
return 0;
error:
if (fd >= 0) {
close(fd);
fd = -1;
}
dwarf_end(dwarf_info);
g_free(dwarf_info);
free(cu);
return fd;
}
int
main (int argc, char *argv[])
{
int cnt;
for (cnt = 1; cnt < argc; ++cnt)
{
int fd = open (argv[cnt], O_RDONLY);
Dwarf *dbg;
printf ("file: %s\n", basename (argv[cnt]));
dbg = dwarf_begin (fd, DWARF_C_READ);
if (dbg == NULL)
{
printf ("%s not usable\n", argv[cnt]);
close (fd);
continue;
}
Dwarf_Off off = 0;
Dwarf_Off old_off = 0;
size_t hsize;
Dwarf_Off abbrev;
uint8_t addresssize;
uint8_t offsetsize;
while (dwarf_nextcu (dbg, off, &off, &hsize, &abbrev, &addresssize,
&offsetsize) == 0)
{
printf ("New CU: off = %llu, hsize = %zu, ab = %llu, as = %" PRIu8
", os = %" PRIu8 "\n",
(unsigned long long int) old_off, hsize,
(unsigned long long int) abbrev, addresssize,
offsetsize);
Dwarf_Die die;
if (dwarf_offdie (dbg, old_off + hsize, &die) != NULL)
handle (dbg, &die, 1);
old_off = off;
}
dwarf_end (dbg);
close (fd);
}
return 0;
}
BT_HIDDEN
void bin_info_destroy(struct bin_info *bin)
{
if (!bin) {
return;
}
dwarf_end(bin->dwarf_info);
free(bin->debug_info_dir);
free(bin->elf_path);
free(bin->dwarf_path);
g_free(bin->build_id);
free(bin->dbg_link_filename);
elf_end(bin->elf_file);
close(bin->elf_fd);
close(bin->dwarf_fd);
g_free(bin);
}
int
main (int argc, char **argv)
{
assert (argc > 1);
int i = open (argv[1], O_RDONLY);
assert (i >= 0);
Dwarf *dw = dwarf_begin (i, DWARF_C_READ);
assert (dw != NULL);
Dwarf_Die die_mem, *die;
die = dwarf_offdie (dw, 11, &die_mem);
assert (die == &die_mem);
assert (dwarf_tag (die) == 0);
die = dwarf_offdie (dw, 11, &die_mem);
assert (die == &die_mem);
assert (dwarf_tag (die) == 0);
dwarf_end (dw);
return 0;
}
int
main (int argc, char *argv[])
{
for (int i = 1; i < argc; ++i)
{
int fd = open (argv[i], O_RDONLY);
Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
if (dbg != NULL)
{
Dwarf_Off off = 0;
size_t cuhl;
Dwarf_Off noff;
while (dwarf_nextcu (dbg, off, &noff, &cuhl, NULL, NULL, NULL) == 0)
{
Dwarf_Die die_mem;
Dwarf_Die *die = dwarf_offdie (dbg, off + cuhl, &die_mem);
Dwarf_Die iter_mem;
Dwarf_Die *iter = &iter_mem;
dwarf_child (die, &iter_mem);
while (1)
{
if (dwarf_tag (iter) == DW_TAG_variable)
{
Dwarf_Attribute attr_mem;
Dwarf_Die form_mem;
dwarf_formref_die (dwarf_attr (iter, DW_AT_type,
&attr_mem),
&form_mem);
}
if (dwarf_siblingof (iter, &iter_mem) != 0)
break;
}
off = noff;
}
off = 0;
uint64_t type_sig;
while (dwarf_next_unit (dbg, off, &noff, &cuhl, NULL, NULL, NULL,
NULL, &type_sig, NULL) == 0)
{
Dwarf_Die die_mem;
Dwarf_Die *die = dwarf_offdie_types (dbg, off + cuhl, &die_mem);
if (die == NULL)
printf ("fail\n");
else
printf ("ok\n");
off = noff;
}
dwarf_end (dbg);
}
close (fd);
}
}
int
main(int argc, char **argv)
{
Dwarf_Off off, lastoff;
Dwarf *dw;
size_t hdr_size;
int cufd, error;
argv0 = argv[0];
if (argc < 3)
usage();
structname = argv[1];
binary = argv[2];
elf_version(EV_CURRENT);
cufd = open(binary, O_RDONLY);
if (cufd == -1)
err(EX_USAGE, "open");
dw = dwarf_begin(cufd, DWARF_C_READ);
if (dw == NULL) {
error = dwarf_errno();
if (error == DWARF_E_NO_REGFILE)
errx(EX_USAGE, "%s: Not a regular file", binary);
dwarf_err_errno(EX_DATAERR, error, "dwarf_begin");
}
get_elf_pointer_size(dw);
/* XXX worry about .debug_types sections later. */
lastoff = off = 0;
while (dwarf_nextcu(dw, off, &off, &hdr_size, NULL, NULL, NULL) == 0) {
Dwarf_Die cu_die, die;
int x;
if (dwarf_offdie(dw, lastoff + hdr_size, &cu_die) == NULL)
continue;
lastoff = off;
/*
* A CU may be empty because e.g. an empty (or fully #if0'd)
* file is compiled.
*/
if (dwarf_child(&cu_die, &die))
continue;
/* Loop through all DIEs in the CU. */
do {
if (isstruct(dwarf_tag(&die)) &&
dwarf_haschildren(&die) &&
dwarf_diename(&die) &&
strcmp(dwarf_diename(&die), structname) == 0) {
structprobe(dw, &die);
goto out;
}
} while ((x = dwarf_siblingof(&die, &die)) == 0);
if (x == -1)
dwarf_err(EX_DATAERR, "dwarf_siblingof");
}
out:
if (dwarf_end(dw))
dwarf_err(EX_SOFTWARE, "dwarf_end");
return (EX_OK);
}
/* Search function from function name */
static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
{
struct dwarf_callback_param *param = data;
struct probe_finder *pf = param->data;
struct perf_probe_point *pp = &pf->pev->point;
/* Check tag and diename */
if (dwarf_tag(sp_die) != DW_TAG_subprogram ||
die_compare_name(sp_die, pp->function) != 0)
return DWARF_CB_OK;
pf->fname = dwarf_decl_file(sp_die);
if (pp->line) { /* Function relative line */
dwarf_decl_line(sp_die, &pf->lno);
pf->lno += pp->line;
param->retval = find_probe_point_by_line(pf);
} else if (!dwarf_func_inline(sp_die)) {
/* Real function */
if (pp->lazy_line)
param->retval = find_probe_point_lazy(sp_die, pf);
else {
if (dwarf_entrypc(sp_die, &pf->addr) != 0) {
pr_warning("Failed to get entry pc of %s.\n",
dwarf_diename(sp_die));
param->retval = -ENOENT;
return DWARF_CB_ABORT;
}
pf->addr += pp->offset;
/* TODO: Check the address in this function */
param->retval = convert_probe_point(sp_die, pf);
}
} else {
struct dwarf_callback_param _param = {.data = (void *)pf,
.retval = 0};
/* Inlined function: search instances */
dwarf_func_inline_instances(sp_die, probe_point_inline_cb,
&_param);
param->retval = _param.retval;
}
return DWARF_CB_ABORT; /* Exit; no same symbol in this CU. */
}
static int find_probe_point_by_func(struct probe_finder *pf)
{
struct dwarf_callback_param _param = {.data = (void *)pf,
.retval = 0};
dwarf_getfuncs(&pf->cu_die, probe_point_search_cb, &_param, 0);
return _param.retval;
}
/* Find kprobe_trace_events specified by perf_probe_event from debuginfo */
int find_kprobe_trace_events(int fd, struct perf_probe_event *pev,
struct kprobe_trace_event **tevs, int max_tevs)
{
struct probe_finder pf = {.pev = pev, .max_tevs = max_tevs};
struct perf_probe_point *pp = &pev->point;
Dwarf_Off off, noff;
size_t cuhl;
Dwarf_Die *diep;
Dwarf *dbg;
int ret = 0;
pf.tevs = zalloc(sizeof(struct kprobe_trace_event) * max_tevs);
if (pf.tevs == NULL)
return -ENOMEM;
*tevs = pf.tevs;
pf.ntevs = 0;
dbg = dwarf_begin(fd, DWARF_C_READ);
if (!dbg) {
pr_warning("No dwarf info found in the vmlinux - "
"please rebuild with CONFIG_DEBUG_INFO=y.\n");
free(pf.tevs);
*tevs = NULL;
return -EBADF;
}
#if _ELFUTILS_PREREQ(0, 142)
/* Get the call frame information from this dwarf */
pf.cfi = dwarf_getcfi(dbg);
#endif
off = 0;
line_list__init(&pf.lcache);
/* Loop on CUs (Compilation Unit) */
while (!dwarf_nextcu(dbg, off, &noff, &cuhl, NULL, NULL, NULL) &&
ret >= 0) {
/* Get the DIE(Debugging Information Entry) of this CU */
diep = dwarf_offdie(dbg, off + cuhl, &pf.cu_die);
if (!diep)
continue;
/* Check if target file is included. */
if (pp->file)
pf.fname = cu_find_realpath(&pf.cu_die, pp->file);
else
pf.fname = NULL;
if (!pp->file || pf.fname) {
if (pp->function)
ret = find_probe_point_by_func(&pf);
else if (pp->lazy_line)
ret = find_probe_point_lazy(NULL, &pf);
else {
pf.lno = pp->line;
ret = find_probe_point_by_line(&pf);
}
}
off = noff;
}
line_list__free(&pf.lcache);
dwarf_end(dbg);
return (ret < 0) ? ret : pf.ntevs;
}
/* Reverse search */
int find_perf_probe_point(int fd, unsigned long addr,
struct perf_probe_point *ppt)
{
Dwarf_Die cudie, spdie, indie;
Dwarf *dbg;
Dwarf_Line *line;
Dwarf_Addr laddr, eaddr;
const char *tmp;
int lineno, ret = 0;
bool found = false;
dbg = dwarf_begin(fd, DWARF_C_READ);
if (!dbg)
return -EBADF;
/* Find cu die */
if (!dwarf_addrdie(dbg, (Dwarf_Addr)addr, &cudie)) {
ret = -EINVAL;
goto end;
}
/* Find a corresponding line */
line = dwarf_getsrc_die(&cudie, (Dwarf_Addr)addr);
if (line) {
if (dwarf_lineaddr(line, &laddr) == 0 &&
(Dwarf_Addr)addr == laddr &&
dwarf_lineno(line, &lineno) == 0) {
tmp = dwarf_linesrc(line, NULL, NULL);
if (tmp) {
ppt->line = lineno;
ppt->file = strdup(tmp);
if (ppt->file == NULL) {
ret = -ENOMEM;
goto end;
}
found = true;
}
}
}
/* Find a corresponding function */
if (die_find_real_subprogram(&cudie, (Dwarf_Addr)addr, &spdie)) {
tmp = dwarf_diename(&spdie);
if (!tmp || dwarf_entrypc(&spdie, &eaddr) != 0)
goto end;
if (ppt->line) {
if (die_find_inlinefunc(&spdie, (Dwarf_Addr)addr,
&indie)) {
/* addr in an inline function */
tmp = dwarf_diename(&indie);
if (!tmp)
goto end;
ret = dwarf_decl_line(&indie, &lineno);
} else {
if (eaddr == addr) { /* Function entry */
lineno = ppt->line;
ret = 0;
} else
ret = dwarf_decl_line(&spdie, &lineno);
}
if (ret == 0) {
/* Make a relative line number */
ppt->line -= lineno;
goto found;
}
}
/* We don't have a line number, let's use offset */
ppt->offset = addr - (unsigned long)eaddr;
found:
ppt->function = strdup(tmp);
if (ppt->function == NULL) {
ret = -ENOMEM;
goto end;
}
found = true;
}
end:
dwarf_end(dbg);
if (ret >= 0)
ret = found ? 1 : 0;
return ret;
}
/* Add a line and store the src path */
static int line_range_add_line(const char *src, unsigned int lineno,
struct line_range *lr)
{
/* Copy real path */
if (!lr->path) {
lr->path = strdup(src);
if (lr->path == NULL)
return -ENOMEM;
}
return line_list__add_line(&lr->line_list, lineno);
}
/* Search function declaration lines */
static int line_range_funcdecl_cb(Dwarf_Die *sp_die, void *data)
{
struct dwarf_callback_param *param = data;
struct line_finder *lf = param->data;
const char *src;
int lineno;
src = dwarf_decl_file(sp_die);
if (src && strtailcmp(src, lf->fname) != 0)
return DWARF_CB_OK;
if (dwarf_decl_line(sp_die, &lineno) != 0 ||
(lf->lno_s > lineno || lf->lno_e < lineno))
return DWARF_CB_OK;
param->retval = line_range_add_line(src, lineno, lf->lr);
if (param->retval < 0)
return DWARF_CB_ABORT;
return DWARF_CB_OK;
}
static int find_line_range_func_decl_lines(struct line_finder *lf)
{
struct dwarf_callback_param param = {.data = (void *)lf, .retval = 0};
dwarf_getfuncs(&lf->cu_die, line_range_funcdecl_cb, ¶m, 0);
return param.retval;
}
/* Find line range from its line number */
static int find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf)
{
Dwarf_Lines *lines;
Dwarf_Line *line;
size_t nlines, i;
Dwarf_Addr addr;
int lineno, ret = 0;
const char *src;
Dwarf_Die die_mem;
line_list__init(&lf->lr->line_list);
if (dwarf_getsrclines(&lf->cu_die, &lines, &nlines) != 0) {
pr_warning("No source lines found in this CU.\n");
return -ENOENT;
}
/* Search probable lines on lines list */
for (i = 0; i < nlines; i++) {
line = dwarf_onesrcline(lines, i);
if (dwarf_lineno(line, &lineno) != 0 ||
(lf->lno_s > lineno || lf->lno_e < lineno))
continue;
if (sp_die) {
/* Address filtering 1: does sp_die include addr? */
if (dwarf_lineaddr(line, &addr) != 0 ||
!dwarf_haspc(sp_die, addr))
continue;
/* Address filtering 2: No child include addr? */
if (die_find_inlinefunc(sp_die, addr, &die_mem))
continue;
}
/* TODO: Get fileno from line, but how? */
src = dwarf_linesrc(line, NULL, NULL);
if (strtailcmp(src, lf->fname) != 0)
continue;
ret = line_range_add_line(src, lineno, lf->lr);
if (ret < 0)
return ret;
}
/*
* Dwarf lines doesn't include function declarations. We have to
* check functions list or given function.
*/
if (sp_die) {
src = dwarf_decl_file(sp_die);
if (src && dwarf_decl_line(sp_die, &lineno) == 0 &&
(lf->lno_s <= lineno && lf->lno_e >= lineno))
ret = line_range_add_line(src, lineno, lf->lr);
} else
ret = find_line_range_func_decl_lines(lf);
/* Update status */
if (ret >= 0)
if (!list_empty(&lf->lr->line_list))
ret = lf->found = 1;
else
ret = 0; /* Lines are not found */
else {
free(lf->lr->path);
lf->lr->path = NULL;
}
return ret;
}
static int line_range_inline_cb(Dwarf_Die *in_die, void *data)
{
struct dwarf_callback_param *param = data;
param->retval = find_line_range_by_line(in_die, param->data);
return DWARF_CB_ABORT; /* No need to find other instances */
}
/* Search function from function name */
static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
{
struct dwarf_callback_param *param = data;
struct line_finder *lf = param->data;
struct line_range *lr = lf->lr;
if (dwarf_tag(sp_die) == DW_TAG_subprogram &&
die_compare_name(sp_die, lr->function) == 0) {
lf->fname = dwarf_decl_file(sp_die);
dwarf_decl_line(sp_die, &lr->offset);
pr_debug("fname: %s, lineno:%d\n", lf->fname, lr->offset);
lf->lno_s = lr->offset + lr->start;
if (lf->lno_s < 0) /* Overflow */
lf->lno_s = INT_MAX;
lf->lno_e = lr->offset + lr->end;
if (lf->lno_e < 0) /* Overflow */
lf->lno_e = INT_MAX;
pr_debug("New line range: %d to %d\n", lf->lno_s, lf->lno_e);
lr->start = lf->lno_s;
lr->end = lf->lno_e;
if (dwarf_func_inline(sp_die)) {
struct dwarf_callback_param _param;
_param.data = (void *)lf;
_param.retval = 0;
dwarf_func_inline_instances(sp_die,
line_range_inline_cb,
&_param);
param->retval = _param.retval;
} else
param->retval = find_line_range_by_line(sp_die, lf);
return DWARF_CB_ABORT;
}
return DWARF_CB_OK;
}
static int find_line_range_by_func(struct line_finder *lf)
{
struct dwarf_callback_param param = {.data = (void *)lf, .retval = 0};
dwarf_getfuncs(&lf->cu_die, line_range_search_cb, ¶m, 0);
return param.retval;
}
int find_line_range(int fd, struct line_range *lr)
{
struct line_finder lf = {.lr = lr, .found = 0};
int ret = 0;
Dwarf_Off off = 0, noff;
size_t cuhl;
Dwarf_Die *diep;
Dwarf *dbg;
dbg = dwarf_begin(fd, DWARF_C_READ);
if (!dbg) {
pr_warning("No dwarf info found in the vmlinux - "
"please rebuild with CONFIG_DEBUG_INFO=y.\n");
return -EBADF;
}
/* Loop on CUs (Compilation Unit) */
while (!lf.found && ret >= 0) {
if (dwarf_nextcu(dbg, off, &noff, &cuhl, NULL, NULL, NULL) != 0)
break;
/* Get the DIE(Debugging Information Entry) of this CU */
diep = dwarf_offdie(dbg, off + cuhl, &lf.cu_die);
if (!diep)
continue;
/* Check if target file is included. */
if (lr->file)
lf.fname = cu_find_realpath(&lf.cu_die, lr->file);
else
lf.fname = 0;
if (!lr->file || lf.fname) {
if (lr->function)
ret = find_line_range_by_func(&lf);
else {
lf.lno_s = lr->start;
lf.lno_e = lr->end;
ret = find_line_range_by_line(NULL, &lf);
}
}
off = noff;
}
pr_debug("path: %lx\n", (unsigned long)lr->path);
dwarf_end(dbg);
return (ret < 0) ? ret : lf.found;
}
int
main (int argc, char *argv[])
{
int result = 0;
int cnt;
for (cnt = 1; cnt < argc; ++cnt)
{
int fd = open (argv[cnt], O_RDONLY);
Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
if (dbg == NULL)
{
printf ("%s not usable\n", argv[cnt]);
result = 1;
if (fd != -1)
close (fd);
continue;
}
Dwarf_Off o = 0;
Dwarf_Off ncu;
Dwarf_Off ao;
size_t cuhl;
uint8_t asz;
uint8_t osz;
while (dwarf_nextcu (dbg, o, &ncu, &cuhl, &ao, &asz, &osz) == 0)
{
printf ("cuhl = %zu, o = %llu, asz = %hhu, osz = %hhu, ncu = %llu\n",
cuhl, (unsigned long long int) ao,
asz, osz, (unsigned long long int) ncu);
Dwarf_Die die_mem;
Dwarf_Die *die = dwarf_offdie (dbg, o + cuhl, &die_mem);
if (die == NULL)
{
printf ("%s: cannot get CU die\n", argv[cnt]);
result = 1;
break;
}
Dwarf_Files *files;
size_t nfiles;
if (dwarf_getsrcfiles (die, &files, &nfiles) != 0)
{
printf ("%s: cannot get files\n", argv[cnt]);
result = 1;
break;
}
for (int i = 0; i < nfiles; ++i)
printf (" file[%d] = \"%s\"\n", i,
dwarf_filesrc (files, i, NULL, NULL));
o = ncu;
}
dwarf_end (dbg);
close (fd);
}
return result;
}
int
main (int argc, char *argv[])
{
int result = 0;
int cnt;
for (cnt = 1; cnt < argc; ++cnt)
{
int fd = open (argv[cnt], O_RDONLY);
Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
if (dbg == NULL)
{
printf ("%s not usable\n", argv[cnt]);
result = 1;
close (fd);
continue;
}
Dwarf_Aranges *aranges;
size_t naranges;
if (dwarf_getaranges (dbg, &aranges, &naranges) != 0)
printf ("%s: cannot get aranges\n", argv[cnt]);
else
{
for (size_t i = 0; i < ntestaddr; ++i)
{
Dwarf_Arange *found;
found = dwarf_getarange_addr (aranges, testaddr[i]);
if (found != NULL)
{
Dwarf_Off cu_offset;
if (dwarf_getarangeinfo (found, NULL, NULL, &cu_offset) != 0)
{
puts ("failed to get CU die offset");
result = 1;
}
else
{
const char *cuname;
Dwarf_Die cu_die;
if (dwarf_offdie (dbg, cu_offset, &cu_die) == NULL
|| (cuname = dwarf_diename (&cu_die)) == NULL)
{
puts ("failed to get CU die");
result = 1;
}
else
printf ("CU name: \"%s\"\n", cuname);
}
}
else
printf ("%#llx: not in range\n",
(unsigned long long int) testaddr[i]);
}
for (size_t i = 0; i < naranges; ++i)
{
Dwarf_Arange *arange = dwarf_onearange (aranges, i);
if (arange == NULL)
{
printf ("cannot get arange %zu: %s\n", i, dwarf_errmsg (-1));
break;
}
Dwarf_Addr start;
Dwarf_Word length;
Dwarf_Off cu_offset;
if (dwarf_getarangeinfo (arange, &start, &length, &cu_offset)
!= 0)
{
printf ("cannot get info from aranges[%zu]\n", i);
result = 1;
}
else
{
printf (" [%2zu] start: %#llx, length: %llu, cu: %llu\n",
i, (unsigned long long int) start,
(unsigned long long int) length,
(unsigned long long int) cu_offset);
const char *cuname;
Dwarf_Die cu_die;
if (dwarf_offdie (dbg, cu_offset, &cu_die) == NULL
|| (cuname = dwarf_diename (&cu_die)) == NULL)
{
puts ("failed to get CU die");
result = 1;
}
else
printf ("CU name: \"%s\"\n", cuname);
}
}
}
dwarf_end (dbg);
close (fd);
}
return result;
}
int
main (int argc, char *argv[])
{
int cnt;
for (cnt = 1; cnt < argc; ++cnt)
{
int fd = open (argv[cnt], O_RDONLY);
Dwarf *dbg = dwarf_begin (fd, DWARF_C_READ);
if (dbg == NULL)
{
printf ("%s not usable: %s\n", argv[cnt], dwarf_errmsg (-1));
close (fd);
continue;
}
Dwarf_Off cuoff = 0;
Dwarf_Off old_cuoff = 0;
size_t hsize;
while (dwarf_nextcu (dbg, cuoff, &cuoff, &hsize, NULL, NULL, NULL) == 0)
{
/* Get the DIE for the CU. */
Dwarf_Die die;
if (dwarf_offdie (dbg, old_cuoff + hsize, &die) == NULL)
/* Something went wrong. */
break;
Dwarf_Off offset = 0;
while (1)
{
size_t length;
Dwarf_Abbrev *abbrev = dwarf_getabbrev (&die, offset, &length);
if (abbrev == NULL || abbrev == DWARF_END_ABBREV)
/* End of the list. */
break;
unsigned tag = dwarf_getabbrevtag (abbrev);
if (tag == 0)
{
printf ("dwarf_getabbrevtag at offset %llu returned error: %s\n",
(unsigned long long int) offset,
dwarf_errmsg (-1));
break;
}
unsigned code = dwarf_getabbrevcode (abbrev);
if (code == 0)
{
printf ("dwarf_getabbrevcode at offset %llu returned error: %s\n",
(unsigned long long int) offset,
dwarf_errmsg (-1));
break;
}
int children = dwarf_abbrevhaschildren (abbrev);
if (children < 0)
{
printf ("dwarf_abbrevhaschildren at offset %llu returned error: %s\n",
(unsigned long long int) offset,
dwarf_errmsg (-1));
break;
}
printf ("abbrev[%llu]: code = %u, tag = %u, children = %d\n",
(unsigned long long int) offset, code, tag, children);
size_t attrcnt;
if (dwarf_getattrcnt (abbrev, &attrcnt) != 0)
{
printf ("dwarf_getattrcnt at offset %llu returned error: %s\n",
(unsigned long long int) offset,
dwarf_errmsg (-1));
break;
}
unsigned int attr_num;
unsigned int attr_form;
Dwarf_Off aboffset;
size_t j;
for (j = 0; j < attrcnt; ++j)
if (dwarf_getabbrevattr (abbrev, j, &attr_num, &attr_form,
&aboffset))
printf ("dwarf_getabbrevattr for abbrev[%llu] and index %zu failed\n",
(unsigned long long int) offset, j);
else
printf ("abbrev[%llu]: attr[%zu]: code = %u, form = %u, offset = %" PRIu64 "\n",
(unsigned long long int) offset, j, attr_num,
attr_form, (uint64_t) aboffset);
offset += length;
}
old_cuoff = cuoff;
}
if (dwarf_end (dbg) != 0)
printf ("dwarf_end failed for %s: %s\n", argv[cnt],
dwarf_errmsg (-1));
close (fd);
}
return 0;
}
