Date: Tue, 8 Mar 2005 19:48:32 +0000 From: Kris Kennaway <kris@FreeBSD.org> To: dg@FreeBSD.org, current@FreeBSD.org, alc@FreeBSD.org Subject: SIGABRT under load (tracked to vm_map_find() returning KERN_NO_SPACE) Message-ID: <20050308194832.GD30165@hub.freebsd.org>
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I finally found a good way to reproduce the SIGABRT errors I've been
seeing off and on for a long time (buildworld -j18 on a 12-processor
sparc64 running RELENG_5).
The error is originating here in kern/imgact_elf.c in the __CONCAT()
function:
if ((error = __elfN(load_section)(imgp->proc, vmspace,
imgp->vp, imgp->object, phdr[i].p_offset,
(caddr_t)(uintptr_t)phdr[i].p_vaddr,
phdr[i].p_memsz, phdr[i].p_filesz, prot,
sv->sv_pagesize)) != 0) {
printf("__elfN(load_section) %d\n",error);
goto fail;
}
On the console:
__elfN(load_section) 22
*(execsw[i]->ex_imgact)(imgp) error 22
Fell through to exec_fail
Process cc received SIGABRT
__elfN(load_section) 22
*(execsw[i]->ex_imgact)(imgp) error 22
Fell through to exec_fail
Process make received SIGABRT
i.e. __elfN(load_section) is returning EINVAL.
I instrumented the three places this is possible in
__elfN(load_section) and found the failure occurs here:
rv = vm_map_find(exec_map,
object,
trunc_page(offset + filsz),
&data_buf,
PAGE_SIZE,
TRUE,
VM_PROT_READ,
VM_PROT_ALL,
MAP_COPY_ON_WRITE | MAP_PREFAULT_PARTIAL);
if (rv != KERN_SUCCESS) {
vm_object_deallocate(object);
printf("rv != KERN_SUCCESS 3\n");
return (EINVAL);
}
Pushing up into vm_map_find() shows that it's returning KERN_NO_SPACE:
if (find_space) {
if (vm_map_findspace(map, start, length, addr)) {
vm_map_unlock(map);
printf("KERN_NO_SPACE\n");
return (KERN_NO_SPACE);
}
start = *addr;
}
Kris
--
In God we Trust -- all others must submit an X.509 certificate.
-- Charles Forsythe <forsythe@alum.mit.edu>
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