[haiku-bugs] Re: [Haiku] #2695: [XSI] Implement SA_SIGINFO for sigaction
- From: "andreasf" <trac@xxxxxxxxxxxx>
- Date: Tue, 06 Apr 2010 01:07:52 -0000
#2695: [XSI] Implement SA_SIGINFO for sigaction
---------------------------+------------------------------------------------
Reporter: andreasf | Owner: axeld
Type: enhancement | Status: reopened
Priority: normal | Milestone: R1
Component: System/POSIX | Version: R1/pre-alpha1
Resolution: | Keywords:
Blockedby: 1935 | Platform: All
Blocking: |
---------------------------+------------------------------------------------
Changes (by andreasf):
* status: closed => reopened
* resolution: duplicate =>
Comment:
Following a discussion on HaikuPorts-devs about how to handle lack of
{{{SA_SIGINFO}}}, I've given this a new try. Not having implemented
{{{sigqueue}}} or {{{waitid}}}, I'm reopening this ticket.
Signals are actually queued in {{{signal.cpp}}} this time and the faulting
address of a {{{SIGSEGV}}} is stuffed into {{{si_addr}}} in {{{vm.cpp}}}.
The {{{x86/arch_thread.cpp}}} frame setup code is unchanged.
Unfortunately it doesn't work yet, due to use of {{{malloc}}} while
interrupts disabled. It's probably not thread-safe either. Comments on how
to improve appreciated!
KDL output follows, from QEMU during splash screen rocket:
{{{
PANIC: memalign(): called with interrupts disabled
Welcome to Kernel Debugging Land...
Thread 12 "main2" running on CPU 0
stack trace for thread 12 "main2"
kernel stack: 0x81d10000 to 0x81d14000
frame caller <image>:function + offset
0 81d13d5c (+ 32) 800df3c4 <kernel_x86>:arch_debug_stack_trace +
0x000f
1 81d13d7c (+ 16) 8006ce98 <kernel_x86> stack_trace_trampoline(void*:
NULL) + 0x000b
2 81d13d8c (+ 12) 800e591a
<kernel_x86>:arch_debug_call_with_fault_handler + 0x001b
3 81d13d98 (+ 48) 8006d38e <kernel_x86>:debug_call_with_fault_handler
+ 0x0053
4 81d13dc8 (+ 64) 8006e142 <kernel_x86> kernel_debugger_loop(char
const*: 0x0 "<NULL>", char const*: 0x8011f8c0 "memalign(): called with
interrupts disabled
", char*: 0x81d13e38, int32: -2147032130) + 0x0212
5 81d13e08 (+ 48) 8006e3dc <kernel_x86> kernel_debugger_internal(char
const*: 0x0 "<NULL>", char const*: 0x8280c018 "", char*: 0x81d13e58,
int32: -2147031636) + 0x0110
6 81d13e38 (+ 32) 8006e5bf <kernel_x86>:panic + 0x0023
7 81d13e58 (+ 80) 8004947f <kernel_x86>:memalign + 0x002a
8 81d13ea8 (+ 32) 8004976a <kernel_x86>:malloc + 0x0010
9 81d13ec8 (+ 48) 800592d9 <kernel_x86> deliver_signal(thread*:
0x828578bd, siginfo_t const*: NULL, uint32: 0x81d13f68) + 0x0077
10 81d13ef8 (+ 48) 80059919 <kernel_x86> send_signal_etc_AF(int32:
-2116993200, siginfo_t const*: NULL, uint32: 0x24 (36)) + 0x00b5
11 81d13f28 (+ 80) 80059a9c <kernel_x86>:send_signal_etc + 0x0027
12 81d13f78 (+ 32) 80062a0e <kernel_x86>:resume_thread + 0x0022
13 81d13f98 (+ 64) 8004f0c7 <kernel_x86> main2(void*: NULL) + 0x01d6
14 81d13fd8 (+ 32) 80062150 <kernel_x86> _create_kernel_thread_kentry()
+ 0x0015
15 81d13ff8 (+2116993032) 80066487 <kernel_x86> thread_kthread_exit() +
0x0000
kdebug>
}}}
--
Ticket URL: <http://dev.haiku-os.org/ticket/2695#comment:10>
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