Date: Wed, 06 May 2015 16:02:21 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-ports-bugs@FreeBSD.org Subject: [Bug 200001] gdb 7.9 crashes on certain core files Message-ID: <bug-200001-13@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200001 Bug ID: 200001 Summary: gdb 7.9 crashes on certain core files Product: Ports & Packages Version: Latest Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: Individual Port(s) Assignee: freebsd-ports-bugs@FreeBSD.org Reporter: wjenkner@inode.at CC: jhb@FreeBSD.org Created attachment 156437 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=156437&action=edit C source file Compile and run the attached foo.c, then examine the resulting core dump with gdb79 (please see the transcript below). This results in gdb79 dumping core. For comparison purposes, gdb782 has a glitch here (a duplicated backtrace for one thread) but it doesn't crash. [1 ~]$ uname -a FreeBSD xxx.yy 10.1-STABLE FreeBSD 10.1-STABLE #0 r280136: Mon Mar 16 18:59:32 CET 2015 adm@xxx.yy:/usr/obj/usr/src/sys/IZNOGOUD amd64 [2 ~]$ cc -Wall -g -O0 -o foo foo.c -lthr [3 ~]$ ./foo Abort trap (core dumped) [4 ~]$ gdb79 --core=foo.core ./foo GNU gdb (GDB) 7.9 [GDB v7.9 for FreeBSD] Copyright (C) 2015 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>; This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-portbld-freebsd10.1". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./foo...done. [New process 101209] [New process 100339] [New Thread 801406800 (LWP 101209)] [New Thread 801406400 (LWP 100339)] Core was generated by `foo'. Program terminated with signal SIGABRT, Aborted. Invalid selected thread. (gdb) thread apply all bt Thread 4 (Thread 801406400 (LWP 100339)): #0 _nanosleep () at _nanosleep.S:3 #1 0x0000000800829b8c in __thr_nanosleep (time_to_sleep=0x7fffffffe4f8, time_remaining=0x7fffffffe4e8) at /usr/src/lib/libthr/thread/thr_syscalls.c:269 #2 0x0000000800aa2ffb in __sleep (seconds=2147483647) at /usr/src/lib/libc/gen/sleep.c:60 #3 0x0000000000400952 in main () at foo.c:35 Segmentation fault (core dumped) [5 ~]$ /tmp/usr/local/bin/gdb782 --core=foo.core ./foo GNU gdb (GDB) 7.8.2 [GDB v7.8.2 for FreeBSD] Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>; This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-portbld-freebsd10.1". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./foo...done. [New process 101209] [New process 100339] [New Thread 801406800 (LWP 101209)] [New Thread 801406400 (LWP 100339)] Core was generated by `foo'. Program terminated with signal SIGABRT, Aborted. #0 thr_kill () at thr_kill.S:3 3 RSYSCALL(thr_kill) (gdb) thread apply all bt Thread 4 (Thread 801406400 (LWP 100339)): #0 _nanosleep () at _nanosleep.S:3 #1 0x0000000800829b8c in __thr_nanosleep (time_to_sleep=0x7fffffffe4f8, time_remaining=0x7fffffffe4e8) at /usr/src/lib/libthr/thread/thr_syscalls.c:269 #2 0x0000000800aa2ffb in __sleep (seconds=2147483647) at /usr/src/lib/libc/gen/sleep.c:60 #3 0x0000000000400952 in main () at foo.c:35 Thread 3 (Thread 801406800 (LWP 101209)): #0 thr_kill () at thr_kill.S:3 #1 0x0000000800b896c6 in __raise (s=6) at /usr/src/lib/libc/gen/raise.c:51 #2 0x0000000800b87ea9 in abort () at /usr/src/lib/libc/stdlib/abort.c:65 #3 0x00000000004008f0 in foo_thread (arg=0x0) at foo.c:19 #4 0x0000000800827775 in thread_start (curthread=0x801406800) at /usr/src/lib/libthr/thread/thr_create.c:288 #5 0x0000000000000000 in ?? () Backtrace stopped: Cannot access memory at address 0x7fffdfffe000 Thread 1 (Thread 801406800 (LWP 101209)): #0 thr_kill () at thr_kill.S:3 #1 0x0000000800b896c6 in __raise (s=6) at /usr/src/lib/libc/gen/raise.c:51 #2 0x0000000800b87ea9 in abort () at /usr/src/lib/libc/stdlib/abort.c:65 #3 0x00000000004008f0 in foo_thread (arg=0x0) at foo.c:19 #4 0x0000000800827775 in thread_start (curthread=0x801406800) at /usr/src/lib/libthr/thread/thr_create.c:288 #5 0x0000000000000000 in ?? () Backtrace stopped: Cannot access memory at address 0x7fffdfffe000 (gdb) quit [6 ~]$ gdb --core=foo.core ./foo GNU gdb 6.1.1 [FreeBSD] 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 "amd64-marcel-freebsd"... Core was generated by `foo'. Program terminated with signal 6, Aborted. Reading symbols from /lib/libthr.so.3...Reading symbols from /usr/lib/debug//lib/libthr.so.3.debug...done. done. Loaded symbols for /lib/libthr.so.3 Reading symbols from /lib/libc.so.7...Reading symbols from /usr/lib/debug//lib/libc.so.7.debug...done. done. Loaded symbols for /lib/libc.so.7 Reading symbols from /libexec/ld-elf.so.1...Reading symbols from /usr/lib/debug//libexec/ld-elf.so.1.debug...done. done. Loaded symbols for /libexec/ld-elf.so.1 #0 thr_kill () at thr_kill.S:3 3 RSYSCALL(thr_kill) [New Thread 801406800 (LWP 101209/foo)] [New Thread 801406400 (LWP 100339/foo)] (gdb) thread apply all bt Thread 2 (Thread 801406400 (LWP 100339/foo)): #0 _nanosleep () at _nanosleep.S:3 #1 0x0000000800829b8c in __thr_nanosleep (time_to_sleep=0x7fffffffe4f8, time_remaining=0x7fffffffe4e8) at /usr/src/lib/libthr/thread/thr_syscalls.c:269 #2 0x0000000800aa2ffb in __sleep () at /usr/src/lib/libc/gen/sleep.c:60 #3 0x0000000000400952 in main () at foo.c:35 Current language: auto; currently asm Thread 1 (Thread 801406800 (LWP 101209/foo)): #0 thr_kill () at thr_kill.S:3 #1 0x0000000800b896c6 in __raise (s=<value optimized out>) at /usr/src/lib/libc/gen/raise.c:51 #2 0x0000000800b87ea9 in abort () at /usr/src/lib/libc/stdlib/abort.c:65 #3 0x00000000004008f0 in foo_thread (arg=0x0) at foo.c:19 #4 0x0000000800827775 in thread_start (curthread=0x801406800) at /usr/src/lib/libthr/thread/thr_create.c:288 #5 0x0000000000000000 in ?? () (gdb) [7 ~]$ -- You are receiving this mail because: You are the assignee for the bug.
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