On 7/4/2011 11:26 AM, Carlos O'Donell wrote:
On Mon, Jul 4, 2011 at 11:21 AM, Carlos O'Donell
<carlos@xxxxxxxxxxxxxxxx> wrote:
pthread_create: ALLOCATE_STACK failed.
timer_helper_thread: pthread_create ret 22
~~~
The second threads stack fails to allocate.
1309792564.144002 set_robust_list(0x4000b4f0, 0xc) = 0
1309792564.144002 rt_sigtimedwait([RTMIN], {si_signo=SIGRTMIN,
si_code=SI_TIMER, si_pid=4, si_uid=0, si_value={int=90456,
ptr=0x16158}}, NULL, 8) = 37
1309792564.368004 write(1, "timer_helper_thread: creating th"..., 40) = 40
1309792564.368004 write(1, "\n", 1) = 1
1309792564.368004 mmap(NULL, 8388608, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x41349000
1309792564.368004 mprotect(0x41b47000, 4096, PROT_NONE) = 0
1309792564.368004 write(1, "do_clone: ARCH_CLONE...\n", 24) = 24
1309792564.368004 write(1, "\n", 1) = 1
1309792564.372004 clone(child_stack=0x41349040,
flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID,
parent_tidptr=0x41b484e8, tls=0x41b48900, child_tidptr=0x41b484e8) =
21795
1309792564.372004 write(1, "timer_helper_thread: pthread_cre"..., 42) = 42
1309792564.372004 rt_sigtimedwait([RTMIN], {si_signo=SIGRTMIN,
si_code=SI_TIMER, si_pid=5, si_uid=0, si_value={int=90520,
ptr=0x16198}}, NULL, 8) = 37
1309792564.476005 write(1, "timer_helper_thread: creating th"..., 40) = 40
1309792564.476005 write(1, "\n", 1) = 1
1309792564.480005 mprotect(0x41b47480, 4096,
PROT_READ|PROT_WRITE|PROT_EXEC) = -1 EINVAL (Invalid argument)
1309792564.480005 munmap(0x41349000, 8388608) = 0
1309792564.480005 write(1, "pthread_create: ALLOCATE_STACK f"..., 39) = 39
Why would this mprotect fail with -EINVAL? It's not page aligned?
You can see the earlier mmap/mprotect from thread one's stack looks
page aligned.
I believe that the stack value needs to be aligned. See comment in
arch_get_unmapped_area. Not sure if this will fix mprotect.
I submitted a patch to return an error if but there was no comment.
Dave
--
To unsubscribe from this list: send the line "unsubscribe linux-parisc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
