1 files changed, 76 insertions, 0 deletions
diff --git a/src/backtrace-lunw.c b/src/backtrace-lunw.c
new file mode 100644
index 0000000..eb29467
--- /dev/null
+++ b/src/backtrace-lunw.c
@@ -0,0 +1,76 @@
+#include <libunwind.h>
+
+#include "config.h"
+#include "backtrace.h"
+
+#define LT_MAXMSG 300
+
+int bt_dump(struct lt_config_shared *cfg, unsigned long flags)
+{
+	unw_cursor_t cursor;
+	unw_context_t uc;
+	int ret = 0;
+
+	unw_getcontext(&uc);
+	if (unw_init_local(&cursor, &uc) < 0) {
+		bt_display(cfg, "unw_init_local failed");
+		return -1;
+	}
+
+	bt_display(cfg, "backtrace:");
+
+	do {
+		char text[LT_MAXMSG];
+		struct bt_map *map;
+		bt_word_t rel_ip = 0, ip = 0, sp;
+		bt_word_t sym_offset = 0;
+		bt_word_t sym_size= 0;
+		char *map_name = NULL;
+		char *sym_name = NULL;
+		struct bt_symbol *symbol = NULL;
+		int size = sizeof(bt_word_t) * 2;
+		int symbol_found = 0;
+
+		unw_get_reg(&cursor, UNW_REG_IP, &ip);
+		unw_get_reg(&cursor, UNW_REG_SP, &sp);
+
+		if (bt_find_map(cfg, &map, ip)) {
+			rel_ip = ip - map->base;
+			map_name = map->name;
+
+			if (bt_find_symbol(cfg, &symbol, map, rel_ip)) {
+				sym_name = symbol->name;
+				sym_offset = rel_ip - symbol->start;
+				sym_size = symbol->end - symbol->start;
+				symbol_found = 1;
+			}
+		}
+
+		if (symbol_found)
+			snprintf(text, LT_MAXMSG,
+				"\t<0x%0*zx> %s+0x%zx/0x%zx [%s]",
+				size, rel_ip,
+				sym_name,
+				sym_offset,
+				sym_size,
+				map_name);
+		else
+			snprintf(text, LT_MAXMSG,
+				"\t<0x%0*zx> [%s]",
+				size, rel_ip,
+				map_name);
+
+		bt_display(cfg, text);
+
+		ret = unw_step(&cursor);
+		if (ret < 0) {
+			unw_get_reg(&cursor, UNW_REG_IP, &ip);
+			snprintf(text, LT_MAXMSG,
+				"unw_step failed for ip=%zx\n",
+				ip);
+			bt_display(cfg, text);
+		}
+	} while (ret > 0);
+
+	return ret;
+}