X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=lib%2Fdwarf.c;fp=lib%2Fdwarf.c;h=c7e2f44856c6a1fe910d5f018462529c1543556f;hp=0000000000000000000000000000000000000000;hb=c40a57e579977be9eb7682480428a89af5ca529c;hpb=220e0cbec97669ccfe4ed8a7e69c73c9ac72062d

diff --git a/lib/dwarf.c b/lib/dwarf.c
new file mode 100644
index 00000000..c7e2f448
--- /dev/null
+++ b/lib/dwarf.c
@@ -0,0 +1,369 @@
+/*
+ * 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,
+		int *contains)
+{
+	int ret;
+
+	ret = dwarf_haspc(die->dwarf_die, addr);
+	if (ret == -1) {
+		goto error;
+	}
+
+	*contains = ret;
+
+	return 0;
+
+error:
+	return -1;
+}