[Converted from Gnats 1881] Ok ok ... I submited another bugreport yesterday because I am in some gdb scripting voodoo. This time, i called an internal function of my ~/.gdbinit, this function is good-working. I was in need to test it again in another condition, so I did 'run' again (type 'y' to kill and start it again), it reached my breakpoint, i called my user-define function that i just called at last program-debuging... and this time I got a nice segfault. I can't send you the source file of the program I am debuging nor my ~/.gdbinit, but I did a bit of debug on the gdb corefile and I hope these informations are enough for you to track it. Good luck. Segmentation fault (core dumped) linux tmp $ gdb --core=core GNU gdb 6.3-debian Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-linux". Using host libthread_db library "/lib/tls/libthread_db.so.1". (no debugging symbols found) Core was generated by `gdb ./l'. Program terminated with signal 11, Segmentation fault. #0 0x0811c9b4 in ?? () gdb> file /usr/bin/gdb Reading symbols from /usr/bin/gdb...(no debugging symbols found)...done. gdb> where #0 0x0811c9b4 in check_typedef () #1 0x080dd1e2 in allocate_value () #2 0x080dd427 in value_copy () #3 0x080dd8ca in value_of_internalvar () #4 0x080e0d20 in evaluate_subexp_standard () #5 0x080deb59 in _initialize_values () #6 0x080e013e in evaluate_subexp_standard () #7 0x080deb59 in _initialize_values () #8 0x080ded7d in evaluate_expression () #9 0x080ed947 in output_command () #10 0x080afaf9 in _initialize_cli_dump () #11 0x080b1b4c in cmd_func () #12 0x0807dd7d in execute_command () #13 0x080b2099 in execute_control_command () #14 0x080b2218 in execute_control_command () #15 0x080b1fb8 in execute_user_command () #16 0x0807dd9c in execute_command () #17 0x0810f9bf in async_disable_stdin () #18 0x0810fe05 in async_disable_stdin () #19 0x23775151 in ?? () #20 0x08306058 in ?? () #21 0x00000003 in ?? () #22 0x00000010 in ?? () #23 0x2391a620 in ?? () #24 0x23919c60 in ?? () #25 0x2391a620 in ?? () #26 0x2385ba94 in ?? () #27 0x082d7980 in ?? () #28 0x00000001 in ?? () #29 0x081ffd9e in default_frame_base () #30 0x5a500dc8 in ?? () #31 0x0810f30b in delete_timer () #32 0x0810f30b in delete_timer () #33 0x0810f8ba in stdin_event_handler () #34 0x0810eb9e in delete_file_handler () #35 0x0810e659 in standard_macro_lookup () ---Type <return> to continue, or q <return> to quit--- #36 0x0810e6b8 in gdb_do_one_event () #37 0x0807d9a1 in catch_exceptions_with_msg () #38 0x0807d820 in throw_exception () #39 0x0807da00 in catch_errors () #40 0x080be4e4 in _initialize_tui_hooks () #41 0x0810c3c3 in current_interp_command_loop () #42 0x080747cb in main () gdb> x/10i $eip 0x811c9b4 <check_typedef+20>: cmpb $0x15,(%eax) 0x811c9b7 <check_typedef+23>: je 0x811cb61 <check_typedef+449> 0x811c9bd <check_typedef+29>: mov 0xc(%ecx),%eax 0x811c9c0 <check_typedef+32>: mov 0x14(%ecx),%edx 0x811c9c3 <check_typedef+35>: mov %eax,%esi 0x811c9c5 <check_typedef+37>: mov %eax,%ebx 0x811c9c7 <check_typedef+39>: and $0x20,%esi 0x811c9ca <check_typedef+42>: and $0x40,%ebx 0x811c9cd <check_typedef+45>: movzbl (%edx),%eax 0x811c9d0 <check_typedef+48>: sub $0x3,%al gdb> p/x $eax $1 = 0x57535f32 gdb> p/c 0x57 $2 = 87 'W' gdb> p/c 0x53 $3 = 83 'S' gdb> p/c 0x5f $4 = 95 '_' gdb> p/c 0x32 $5 = 50 '2' gdb> x/42x $esp 0x5a5005b0: 0x08386a60 0x23919c60 0x00000010 0x2391a620 0x5a5005c0: 0x23919c60 0x2391a620 0x083f2b44 0x083f2b44 0x5a5005d0: 0x083bf9c8 0x0000002f 0x5a5005e8 0x080dd1e2 0x5a5005e0: 0x083f2b44 0x00000001 0x5a500608 0x080dd427 0x5a5005f0: 0x083f2b44 0x0827b5c8 0x5a500608 0x00000001 0x5a500600: 0x08356170 0x0000002f 0x5a500628 0x080dd8ca 0x5a500610: 0x083bf9c8 0x2391a620 0x08211a67 0x103fedfc 0x5a500620: 0x00000001 0x5a500bc4 0x5a5008c8 0x080e0d20 0x5a500630: 0x08356170 0x0000000c 0x00000058 0x2391a620 0x5a500640: 0x23919c60 0x2391a620 0x00000001 0x5a500668 0x5a500650: 0x2385a8c3 0x2391a620 gdb> info r eax 0x57535f32 1465081650 ecx 0x83f2b44 138357572 edx 0x83f2b44 138357572 ebx 0x83f2b44 138357572 esp 0x5a5005b0 0x5a5005b0 ebp 0x5a5005d8 0x5a5005d8 esi 0x83bf9c8 138148296 edi 0x2f 47 eip 0x811c9b4 0x811c9b4 eflags 0x10202 66050 cs 0x73 115 ss 0x7b 123 ds 0xc01f007b -1071710085 es 0x7b 123 fs 0x0 0 gs 0x33 51 gdb> Release: gdb 6.3 Environment: GNU gdb 6.3-debian How-To-Repeat: I have no idee (well, sometime, but actually not)
This report is very old and doesn't have enough information to reproduce the problem. I think it has probably been fixed in the intervening years. If you can reproduce with a newer gdb, please reopen and supply more information, thanks.