Major Description
All we need to do is to call TSDebug like this with a long string of 1200+ characters
TSDebug(tag, "123123123123...", NULL);
Here is a sample stack trace.
Core was generated by `/home/y/bin/traffic_server -M --httpport 80:fd=8,443:fd=9:ssl'. Program terminated with signal 11, Segmentation fault. #0 0x00002abfb339ac7f in Diags::print_va(const char *, DiagsLevel, const SrcLoc *, const char *, typedef __va_list_tag __va_list_tag *) const (this=0x22359b0, debu g_tag=0x2abfef4f1424 "ts_lua", diags_level=DL_Diag, loc=0x0, format_string=0x413c24a8 "asdasd", '1' <repeats 13 times>, "2222222111111111122222211111111112222221111 111111222222111111111122222211111111112222221111111111222222111111111122222211111111112222221111111111222222111111111122222211111111112222"..., ap=0x2abfb90134b0) a t Diags.cc:254 254 Diags.cc: No such file or directory. in Diags.cc Starting GDB Here ================= #0 0x00002abfb339ac7f in Diags::print_va(const char *, DiagsLevel, const SrcLoc *, const char *, typedef __va_list_tag __va_list_tag *) const (this=0x22359b0, debu g_tag=0x2abfef4f1424 "ts_lua", diags_level=DL_Diag, loc=0x0, format_string=0x413c24a8 "asdasd", '1' <repeats 13 times>, "2222222111111111122222211111111112222221111 111111222222111111111122222211111111112222221111111111222222111111111122222211111111112222221111111111222222111111111122222211111111112222"..., ap=0x2abfb90134b0) a t Diags.cc:254 buffer = 0x2abfef4f1424 "ts_lua" d = 0x22359b0 "pW#\002" format_buf_w_ts = "\000\000\000\000\000\000\000\000@,\001\271\277*", '\000' <repeats 114 times>, "[Jan 4 07:09:26.996] Server {0x2abfb901c700} DIAG: (ts_1\ 254\306\061\347\305\352A] req_id*\024O\357\277*\000\000*\024O\357\277*\000\000\360\061\001\271\277*\000\000\035^#\002", '\000' <repeats 12 times>, "\002\000\000\000 \000\000\000\000Bq\001 1", '\000' <repeats 19 times>, "\002", '\000' <repeats 39 times>, "1\254\306\061\347\305\352A$\024O\357\277*", '\000' <repeats 18 times>, "p2 \001\271\002\000\000\000\035^#\002", '\000' <repeats 12 times>, "\002\000\000\000\377\377\377\177\000\000\000\000\000\000\000\000"... cur_clock = 3544668469065757234 timestamp_buf = "111122222211111111112222221111111111222222111111" format_buf = "{0x2abfb901c700} DIAG: (ts_lua) asdasd", '1' <repeats 13 times>, "2222222111111111122222211111111112222221111111111222222111111111122222211111 1111122222211111111112222221111111111222222111111111122222211111111112222221111111111"... id = 47002931021568 tp = {tv_sec = 3617008641886990641, tv_usec = 3544668469065757234} s = 0x64d83136 <Address 0x64d83136 out of bounds> end_of_format = 0x2abfb901343c "" #1 0x000000000051a53e in TSDebug (tag=0x2abfef4f1424 "ts_lua", format_str=0x413c24a8 "asdasd", '1' <repeats 13 times>, "2222222111111111122222211111111112222221111 111111222222111111111122222211111111112222221111111111222222111111111122222211111111112222221111111111222222111111111122222211111111112222"...) at InkAPI.cc:6831 ap = {{gp_offset = 16, fp_offset = 48, overflow_arg_area = 0x2abfb90135a0, reg_save_area = 0x2abfb90134d0}} #2 0x00002abfef4edf73 in ts_lua_debug (L=<value optimized out>) at trafficserver/plugins/experimental/ts_lua/ts_lua_misc.c:82 msg = <value optimized out> #3 0x00000000005b7c38 in lj_BC_FUNCC () g_rec_config_contents_ht = 0x2234070 g_rec_config_fpath = 0x0 g_rec_config_contents_llq = 0x2233ff0 g_rec_config_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0} #4 0x0000000000576dd0 in lua_pcall (L=<value optimized out>, nargs=<value optimized out>, nresults=<value optimized out>, errfunc=<value optimized out>) at lj_api. c:1052 g = 0x413b13b8 oldh = 0 '\000' ef = <value optimized out> status = <value optimized out> #5 0x00002abfef4e7621 in globalHookHandler (contp=<value optimized out>, event=TS_EVENT_HTTP_READ_REQUEST_HDR, edata=0x2aaab62f5990) at trafficserver/plugins/exper imental/ts_lua/ts_lua.c:332 txnp = 0x2aaab62f5990 bufp = 0x2aaab62f5c98 hdr_loc = 0x806cd48 url_loc = 0x806cfc8 ret = <value optimized out> req_id = <value optimized out> txn_contp = 0x7dff980 l = 0x407f9460 main_ctx = 0x2576478 http_ctx = 0x2abff803ce60 conf = <value optimized out> __FUNCTION__ = "globalHookHandler" #6 0x000000000050b6b8 in INKContInternal::handle_event (this=0x240b060, event=60002, edata=0x2aaab62f5990) at InkAPI.cc:1000 No locals. #7 0x00000000004f6cc8 in Continuation::handleEvent (this=0x240b060, event=60002, data=0x2aaab62f5990) at ../iocore/eventsystem/I_Continuation.h:146 No locals. #8 0x000000000050beff in APIHook::invoke (this=0x2406620, event=60002, edata=0x2aaab62f5990) at InkAPI.cc:1219 No locals. #9 0x00000000005ce6cd in HttpSM::state_api_callout (this=0x2aaab62f5990, event=60000, data=0x0) at HttpSM.cc:1383 plugin_lock = false plugin_mutex = {m_ptr = 0x0} hook = 0x2406620 api_next = HttpSM::API_RETURN_UNKNOWN __func__ = "state_api_callout" #10 0x00000000005ce0fa in HttpSM::state_api_callback (this=0x2aaab62f5990, event=60000, data=0x0) at HttpSM.cc:1276 __func__ = "state_api_callback"