/*
* dwarf.c
*
* Babeltrace - DWARF Information Reader
*
* Copyright 2015 Antoine Busque <abusque@efficios.com>
*
* Author: Antoine Busque <abusque@efficios.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <glib.h>
#include <babeltrace/dwarf.h>
BT_HIDDEN
struct bt_dwarf_cu *bt_dwarf_cu_create(Dwarf *dwarf_info)
{
struct bt_dwarf_cu *cu;
if (!dwarf_info) {
goto error;
}
cu = g_new0(struct bt_dwarf_cu, 1);
if (!cu) {
goto error;
}
cu->dwarf_info = dwarf_info;
return cu;
error:
return NULL;
}
BT_HIDDEN
void bt_dwarf_cu_destroy(struct bt_dwarf_cu *cu)
{
g_free(cu);
}
BT_HIDDEN
int bt_dwarf_cu_next(struct bt_dwarf_cu *cu)
{
int ret;
Dwarf_Off next_offset;
size_t cu_header_size;
if (!cu) {
ret = -1;
goto end;
}
ret = dwarf_nextcu(cu->dwarf_info, cu->next_offset, &next_offset,
&cu_header_size, NULL, NULL, NULL);
if (ret) {
/* ret is -1 on error, 1 if no next CU. */
goto end;
}
cu->offset = cu->next_offset;
cu->next_offset = next_offset;
cu->header_size = cu_header_size;
end:
return ret;
}
BT_HIDDEN
struct bt_dwarf_die *bt_dwarf_die_create(struct bt_dwarf_cu *cu)
{
Dwarf_Die *dwarf_die = NULL;
struct bt_dwarf_die *die = NULL;
if (!cu) {
goto error;
}
dwarf_die = g_new0(Dwarf_Die, 1);
if (!dwarf_die) {
goto error;
}
dwarf_die = dwarf_offdie(cu->dwarf_info, cu->offset + cu->header_size,
dwarf_die);
if (!dwarf_die) {
goto error;
}
die = g_new0(struct bt_dwarf_die, 1);
if (!die) {
goto error;
}
die->cu = cu;
die->dwarf_die = dwarf_die;
die->depth = 0;
return die;
error:
g_free(dwarf_die);
g_free(die);
return NULL;
}
BT_HIDDEN
void bt_dwarf_die_destroy(struct bt_dwarf_die *die)
{
if (!die) {
return;
}
g_free(die->dwarf_die);
g_free(die);
}
BT_HIDDEN
int bt_dwarf_die_child(struct bt_dwarf_die *die)
{
int ret;
Dwarf_Die *child_die = NULL;
if (!die) {
ret = -1;
goto error;
}
child_die = g_new0(Dwarf_Die, 1);
if (!child_die) {
ret = -1;
goto error;
}
ret = dwarf_child(die->dwarf_die, child_die);
if (ret) {
/* ret is -1 on error, 1 if no child DIE. */
goto error;
}
g_free(die->dwarf_die);
die->dwarf_die = child_die;
die->depth++;
return 0;
error:
g_free(child_die);
return ret;
}
BT_HIDDEN
int bt_dwarf_die_next(struct bt_dwarf_die *die)
{
int ret;
Dwarf_Die *next_die = NULL;
if (!die) {
ret = -1;
goto error;
}
next_die = g_new0(Dwarf_Die, 1);
if (!next_die) {
ret = -1;
goto error;
}
if (die->depth == 0) {
ret = dwarf_child(die->dwarf_die, next_die);
if (ret) {
/* ret is -1 on error, 1 if no child DIE. */
goto error;
}
die->depth = 1;
} else {
ret = dwarf_siblingof(die->dwarf_die, next_die);
if (ret) {
/* ret is -1 on error, 1 if we reached end of
* DIEs at this depth. */
goto error;
}
}
g_free(die->dwarf_die);
die->dwarf_die = next_die;
return 0;
error:
g_free(next_die);
return ret;
}
BT_HIDDEN
int bt_dwarf_die_get_tag(struct bt_dwarf_die *die, int *tag)
{
int _tag;
if (!die || !tag) {
goto error;
}
_tag = dwarf_tag(die->dwarf_die);
if (_tag == DW_TAG_invalid) {
goto error;
}
*tag = _tag;
return 0;
error:
return -1;
}
BT_HIDDEN
int bt_dwarf_die_get_name(struct bt_dwarf_die *die, char **name)
{
const char *_name;
if (!die || !name) {
goto error;
}
_name = dwarf_diename(die->dwarf_die);
if (!_name) {
goto error;
}
*name = strdup(_name);
if (!*name) {
goto error;
}
return 0;
error:
return -1;
}
BT_HIDDEN
int bt_dwarf_die_get_call_file(struct bt_dwarf_die *die, char **filename)
{
int ret;
Dwarf_Sword file_no;
const char *_filename = NULL;
Dwarf_Files *src_files = NULL;
Dwarf_Attribute *file_attr = NULL;
struct bt_dwarf_die *cu_die = NULL;
if (!die || !filename) {
goto error;
}
file_attr = g_new0(Dwarf_Attribute, 1);
if (!file_attr) {
goto error;
}
file_attr = dwarf_attr(die->dwarf_die, DW_AT_call_file, file_attr);
if (!file_attr) {
goto error;
}
ret = dwarf_formsdata(file_attr, &file_no);
if (ret) {
goto error;
}
cu_die = bt_dwarf_die_create(die->cu);
if (!cu_die) {
goto error;
}
ret = dwarf_getsrcfiles(cu_die->dwarf_die, &src_files, NULL);
if (ret) {
goto error;
}
_filename = dwarf_filesrc(src_files, file_no, NULL, NULL);
if (!_filename) {
goto error;
}
*filename = strdup(_filename);
bt_dwarf_die_destroy(cu_die);
g_free(file_attr);
return 0;
error:
bt_dwarf_die_destroy(cu_die);
g_free(file_attr);
return -1;
}
BT_HIDDEN
int bt_dwarf_die_get_call_line(struct bt_dwarf_die *die,
uint64_t *line_no)
{
int ret = 0;
Dwarf_Attribute *line_attr = NULL;
uint64_t _line_no;
if (!die || !line_no) {
goto error;
}
line_attr = g_new0(Dwarf_Attribute, 1);
if (!line_attr) {
goto error;
}
line_attr = dwarf_attr(die->dwarf_die, DW_AT_call_line, line_attr);
if (!line_attr) {
goto error;
}
ret = dwarf_formudata(line_attr, &_line_no);
if (ret) {
goto error;
}
*line_no = _line_no;
g_free(line_attr);
return 0;
error:
g_free(line_attr);
return -1;
}
BT_HIDDEN
int bt_dwarf_die_contains_addr(struct bt_dwarf_die *die, uint64_t addr,
bool *contains)
{
int ret;
ret = dwarf_haspc(die->dwarf_die, addr);
if (ret == -1) {
goto error;
}
*contains = (ret == 1);
return 0;
error:
return -1;
}