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Question Crash on Look .anything

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14 Jun 2020 17:32 - 14 Jun 2020 17:33 #8774 by Enceladus
Getting a weird crash on stock tbamud2020 when I do look .obj or look <any number>.obj. Here's the debug from LLDB
Code:
2020-06-15 01:22:48.120251+0800 circle[1517:55047] detected source and destination buffer overlap Process 1517 stopped * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT frame #0: 0x00007fff6dceeb66 libsystem_kernel.dylib`__pthread_kill + 10 libsystem_kernel.dylib`__pthread_kill: -> 0x7fff6dceeb66 <+10>: jae 0x7fff6dceeb70 ; <+20> 0x7fff6dceeb68 <+12>: movq %rax, %rdi 0x7fff6dceeb6b <+15>: jmp 0x7fff6dce5ae5 ; cerror_nocancel 0x7fff6dceeb70 <+20>: retq Target 0: (circle) stopped. (lldb) bt * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT * frame #0: 0x00007fff6dceeb66 libsystem_kernel.dylib`__pthread_kill + 10 frame #1: 0x00007fff6deb9080 libsystem_pthread.dylib`pthread_kill + 333 frame #2: 0x00007fff6dc4a1ae libsystem_c.dylib`abort + 127 frame #3: 0x00007fff6dc4a321 libsystem_c.dylib`abort_report_np + 177 frame #4: 0x00007fff6dc6ebf5 libsystem_c.dylib`__chk_fail + 48 frame #5: 0x00007fff6dc6ec05 libsystem_c.dylib`__chk_fail_overlap + 16 frame #6: 0x00007fff6dc6ec27 libsystem_c.dylib`__chk_overlap + 34 frame #7: 0x00007fff6dc6ee01 libsystem_c.dylib`__strcpy_chk + 64 frame #8: 0x0000000100090bfe circle`generic_find [inlined] get_number at handler.c:602 [opt] frame #9: 0x0000000100090b9d circle`generic_find(arg=<unavailable>, bitvector=45, ch=0x00000001038b5690, tar_ch=0x00007ffeefbf2b80, tar_obj=0x00007ffeefbf2b68) at handler.c:1359 [opt] frame #10: 0x000000010000744a circle`look_at_target(ch=0x00000001038b5690, arg=<unavailable>) at act.informative.c:718 [opt] frame #11: 0x00000001000071e9 circle`do_look(ch=0x00000001038b5690, argument=" 2.board", cmd=<unavailable>, subcmd=0) at act.informative.c:0 [opt] frame #12: 0x00000001000a0707 circle`command_interpreter(ch=0x00000001038b5690, argument=<unavailable>) at interpreter.c:586 [opt] frame #13: 0x000000010004e20c circle`game_loop(local_mother_desc=3) at comm.c:904 [opt] frame #14: 0x000000010004c383 circle`main [inlined] init_game(local_port=<unavailable>) at comm.c:541 [opt] frame #15: 0x000000010004bf54 circle`main(argc=<unavailable>, argv=<unavailable>) at comm.c:352 [opt] frame #16: 0x00007fff6db9e015 libdyld.dylib`start + 1 (lldb)
Last edit: 14 Jun 2020 17:33 by Enceladus.

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16 Jun 2020 18:10 #8776 by WhiskyTest
Replied by WhiskyTest on topic Crash on Look .anything
I wasn't able to reproduce this from Cygwin on Windows

Any other info you can provide?

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17 Jun 2020 11:33 #8777 by Rumble
Replied by Rumble on topic Crash on Look .anything
I was unable to reproduce as well. I noticed it crashed for you on look 2.board, possibly the board code/SPEC. Please provide more details and another example crash.

Rumble
The Builder Academy
tbamud.com 9091
rumble@tbamud.com

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17 Jun 2020 12:06 #8778 by Enceladus
Replied by Enceladus on topic Crash on Look .anything
Compiled on MacOS HighSierra

Other commands that will crash it also involve the '.' such as 'read 2.mail' , 'exa 2.obj' , 'look 2.mob' , 'get all 2.bag' , but will NOT crash on 'get 2.bag'.

I went back and compiled stock CircleMUD 3.1 and also get the crash using the above commands as well.

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17 Jun 2020 12:25 #8779 by Enceladus
Replied by Enceladus on topic Crash on Look .anything
Here is the crash log for the command 'get all 2.bag' :
Code:
(lldb) bt * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT * frame #0: 0x00007fff6dceeb66 libsystem_kernel.dylib`__pthread_kill + 10 frame #1: 0x00007fff6deb9080 libsystem_pthread.dylib`pthread_kill + 333 frame #2: 0x00007fff6dc4a1ae libsystem_c.dylib`abort + 127 frame #3: 0x00007fff6dc4a321 libsystem_c.dylib`abort_report_np + 177 frame #4: 0x00007fff6dc6ebf5 libsystem_c.dylib`__chk_fail + 48 frame #5: 0x00007fff6dc6ec05 libsystem_c.dylib`__chk_fail_overlap + 16 frame #6: 0x00007fff6dc6ec27 libsystem_c.dylib`__chk_overlap + 34 frame #7: 0x00007fff6dc6ee01 libsystem_c.dylib`__strcpy_chk + 64 frame #8: 0x0000000100090bfe circle`generic_find [inlined] get_number at handler.c:602 [opt] frame #9: 0x0000000100090b9d circle`generic_find(arg=<unavailable>, bitvector=44, ch=0x0000000103b600d0, tar_ch=0x00007ffeefbf2bb8, tar_obj=0x00007ffeefbf2bc8) at handler.c:1359 [opt] frame #10: 0x000000010001657e circle`do_get(ch=0x0000000103b600d0, argument=<unavailable>, cmd=<unavailable>, subcmd=<unavailable>) at act.item.c:355 [opt] frame #11: 0x00000001000a0707 circle`command_interpreter(ch=0x0000000103b600d0, argument=<unavailable>) at interpreter.c:586 [opt] frame #12: 0x000000010004e20c circle`game_loop(local_mother_desc=3) at comm.c:904 [opt] frame #13: 0x000000010004c383 circle`main [inlined] init_game(local_port=<unavailable>) at comm.c:541 [opt] frame #14: 0x000000010004bf54 circle`main(argc=<unavailable>, argv=<unavailable>) at comm.c:352 [opt] frame #15: 0x00007fff6db9e015 libdyld.dylib`start + 1 (lldb)

And looking at some of the frames:
Code:
(lldb) frame select 8 circle was compiled with optimization - stepping may behave oddly; variables may not be available. frame #8: 0x0000000100090bfe circle`generic_find [inlined] get_number at handler.c:602 [opt] 599 if ((ppos = strchr(*name, '.')) != NULL) { 600 *ppos++ = '\0'; 601 strlcpy(number, *name, sizeof(number)); -> 602 strcpy(*name, ppos); /* strcpy: OK (always smaller) */ 603 604 for (i = 0; *(number + i); i++) 605 if (!isdigit(*(number + i))) (lldb) frame variable (char [512]) number = "2" (char *) ppos = 0x00007ffeefbf2772 "g" (int) i = 0 (lldb) frame select 9 frame #9: 0x0000000100090b9d circle`generic_find(arg=<unavailable>, bitvector=44, ch=0x0000000103b600d0, tar_ch=0x00007ffeefbf2bb8, tar_obj=0x00007ffeefbf2bc8) at handler.c:1359 [opt] 1356 1357 if (!*name) 1358 return (0); -> 1359 if (!(number = get_number(&name))) 1360 return (0); 1361 1362 if (IS_SET(bitvector, FIND_CHAR_ROOM)) { /* Find person in room */ (lldb) frame variable (char *) arg = <variable not available> (bitvector_t) bitvector = 44 (char_data *) ch = 0x0000000103b600d0 (char_data **) tar_ch = 0x00007ffeefbf2bb8 (obj_data **) tar_obj = 0x00007ffeefbf2bc8 (char [512]) name_val = "bag" (char *) name = 0x0000006700676162 "" (int) number = <variable not available> (int) i = <variable not available> (int) found = <variable not available> (lldb) frame select 10 frame #10: 0x000000010001657e circle`do_get(ch=0x0000000103b600d0, argument=<unavailable>, cmd=<unavailable>, subcmd=<unavailable>) at act.item.c:355 [opt] 352 } 353 cont_dotmode = find_all_dots(arg2); 354 if (cont_dotmode == FIND_INDIV) { -> 355 mode = generic_find(arg2, FIND_OBJ_EQUIP | FIND_OBJ_INV | FIND_OBJ_ROOM, ch, &tmp_char, &cont); 356 if (!cont) 357 send_to_char(ch, "You don't have %s %s.\r\n", AN(arg2), arg2); 358 else if (GET_OBJ_TYPE(cont) != ITEM_CONTAINER) (lldb) frame variable (char_data *) ch = 0x0000000103b600d0 (char *) argument = <variable not available> (int) cmd = <variable not available> (int) subcmd = <variable not available> (char [512]) arg1 = "all" (char [512]) arg2 = "2.bag" (char [512]) arg3 = "" (int) found = 0 (int) cont_dotmode = 0 (char_data *) tmp_char = 0x0000000000000000 (obj_data *) cont = 0x0000000000000000 (int) mode = <register rax is not available> (int) amount = 1 (lldb) frame select 11 frame #11: 0x00000001000a0707 circle`command_interpreter(ch=0x0000000103b600d0, argument=<unavailable>) at interpreter.c:586 [opt] 583 send_to_char(ch, "No way! You're fighting for your life!\r\n"); 584 break; 585 } else if (no_specials || !special(ch, cmd, line)) -> 586 ((*complete_cmd_info[cmd].command_pointer) (ch, line, cmd, complete_cmd_info[cmd].subcmd)); 587 } 588 589 /* Routines to handle aliasing. */ (lldb) frame variable (char_data *) ch = 0x0000000103b600d0 (char *) argument = <variable not available> (char [512]) arg = "get" (char *) line = 0x00007ffeefbf3673 " all 2.bag" (int) cmd = 499 (int) length = <no location, value may have been optimized out> (lldb) frame select 12 frame #12: 0x000000010004e20c circle`game_loop(local_mother_desc=3) at comm.c:904 [opt] 901 d->has_prompt = TRUE; /* To get newline before next cmd output. */ 902 else if (perform_alias(d, comm, sizeof(comm))) /* Run it through aliasing system */ 903 get_from_q(&d->input, comm, &aliased); -> 904 command_interpreter(d->character, comm); /* Send it to interpreter */ 905 } 906 } 907 (lldb) frame variable (socket_t) local_mother_desc = 3 (char [512]) comm = "get all 2.bag" (timeval) last_time = (tv_sec = 1592395699, tv_usec = 417333) (fd_set) input_set = { fds_bits = { [0] = 16 [1] = 0 [2] = 0 [3] = 0 [4] = 0 [5] = 0 [6] = 0 [7] = 0 [8] = 0 [9] = 0 [10] = 0 [11] = 0 [12] = 0 [13] = 0 [14] = 0 [15] = 0 [16] = 0 [17] = 0 [18] = 0 [19] = 0 [20] = 0 [21] = 0 [22] = 0 [23] = 0 [24] = 0 [25] = 0 [26] = 0 [27] = 0 [28] = 0 [29] = 0 [30] = 0 [31] = 0 } } (int) maxdesc = <variable not available> (descriptor_data *) d = 0x0000000000000000 (timeval) before_sleep = (tv_sec = 1592395699, tv_usec = 319276) (int) missed_pulses = <variable not available> (timeval) now = (tv_sec = 1592395699, tv_usec = 420435) (timeval) timeout = (tv_sec = 0, tv_usec = 0) (fd_set) exc_set = { fds_bits = { [0] = 0 [1] = 0 [2] = 0 [3] = 0 [4] = 0 [5] = 0 [6] = 0 [7] = 0 [8] = 0 [9] = 0 [10] = 0 [11] = 0 [12] = 0 [13] = 0 [14] = 0 [15] = 0 [16] = 0 [17] = 0 [18] = 0 [19] = 0 [20] = 0 [21] = 0 [22] = 0 [23] = 0 [24] = 0 [25] = 0 [26] = 0 [27] = 0 [28] = 0 [29] = 0 [30] = 0 [31] = 0 } } (fd_set) output_set = { fds_bits = { [0] = 16 [1] = 0 [2] = 0 [3] = 0 [4] = 0 [5] = 0 [6] = 0 [7] = 0 [8] = 0 [9] = 0 [10] = 0 [11] = 0 [12] = 0 [13] = 0 [14] = 0 [15] = 0 [16] = 0 [17] = 0 [18] = 0 [19] = 0 [20] = 0 [21] = 0 [22] = 0 [23] = 0 [24] = 0 [25] = 0 [26] = 0 [27] = 0 [28] = 0 [29] = 0 [30] = 0 [31] = 0 } } (descriptor_data *) next_d = 0x0000000000000000 (int) aliased = 0 (fd_set) null_set = <no location, value may have been optimized out> (timeval) opt_time = <no location, value may have been optimized out> (timeval) process_time = <no location, value may have been optimized out> (timeval) temp_time = <no location, value may have been optimized out>

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27 Jun 2020 10:12 #8795 by Enceladus
Replied by Enceladus on topic Crash on Look .anything
I took the files over to my Windows computer and compiled under Windows Subsystem for Linux with gcc and I no longer get the crash with looking at 2. of anything while on that computer. On OSX homebrew uses clang to compile. Maybe there's some issue going on here with clang?

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