Bug 33182
| Summary: | gdb(1) seg faults when given handle SIGALRM nopass for threaded app | ||
|---|---|---|---|
| Product: | Base System | Reporter: | Kip Macy <kip_macy> |
| Component: | bin | Assignee: | freebsd-bugs (Nobody) <bugs> |
| Status: | Closed Overcome By Events | ||
| Severity: | Affects Only Me | CC: | jhb |
| Priority: | Normal | ||
| Version: | Unspecified | ||
| Hardware: | Any | ||
| OS: | Any | ||
Responsible Changed From-To: freebsd-bugs->mp Over to maintainer. I've already fixed this in the gdb51 port. I hope we can migrate to it soon. child_ops and procfs_ops don't implement to_notice_signals. If you look more
closely you'll notice that this is not needed.
diff /usr/src/gnu/usr.bin/binutils/gdb/freebsd-uthread.c.bak
/usr/src/gnu/usr.bin/binutils/gdb/freebsd-uthread.c
1116c1116
< freebsd_uthread_ops.to_notice_signals = freebsd_uthread_notice_signals;
---
> freebsd_uthread_ops.to_notice_signals = 0;
Responsible Changed From-To: mp->marcel Yet another PR that describes a gdb 4 bug. Responsible Changed From-To: marcel->freebsd-bugs Assign back to the pool. I haven't been working on it and it's unlikely I will in the near future. Even the ancient GDB in the base should have this fixed. |
GNU gdb 4.18 Copyright 1998 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-unknown-freebsd"... (gdb) b main Breakpoint 1 at 0x804864a: file alrmtest.c, line 55. (gdb) r Starting program: /usr/home/kmacy/netapp/dvlp/alrmtest Breakpoint 1, main () at alrmtest.c:55 55 sk_init_timer(); (gdb) list 50 } 51 52 int 53 main() { 54 int i, j; 55 sk_init_timer(); 56 while (1) { 57 /* useless assignment to demonstrate lack of progress */ 58 i = 0; 59 /* useless assignment to demonstrate lack of progress */ (gdb) n 56 while (1) { (gdb) n Program received signal SIGTRAP, Trace/breakpoint trap. 0x280f1150 in _thread_sys_sigprocmask () from /usr/lib/libc_r.so.4 (gdb) n Single stepping until exit from function _thread_sys_sigprocmask, which has no line number information. Program received signal SIGTRAP, Trace/breakpoint trap. 0x280f1150 in _thread_sys_sigprocmask () from /usr/lib/libc_r.so.4 (gdb) handle SIGALRM nopass Segmentation fault (core dumped) How-To-Repeat: link app with libc_r type handle SIGALRM nopass in gdb