Date: Wed, 22 Apr 2015 10:57:00 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r281848 - in stable/10/sys: kern sys Message-ID: <201504221057.t3MAv1AY060906@svn.freebsd.org>
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Author: kib Date: Wed Apr 22 10:57:00 2015 New Revision: 281848 URL: https://svnweb.freebsd.org/changeset/base/281848 Log: MFC r281548: Implement support for binary to request specific stack size for the initial thread. Modified: stable/10/sys/kern/imgact_elf.c stable/10/sys/kern/kern_exec.c stable/10/sys/kern/kern_resource.c stable/10/sys/sys/imgact.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/kern/imgact_elf.c ============================================================================== --- stable/10/sys/kern/imgact_elf.c Wed Apr 22 10:25:08 2015 (r281847) +++ stable/10/sys/kern/imgact_elf.c Wed Apr 22 10:57:00 2015 (r281848) @@ -776,6 +776,7 @@ __CONCAT(exec_, __elfN(imgact))(struct i if (__elfN(nxstack)) imgp->stack_prot = __elfN(trans_prot)(phdr[i].p_flags); + imgp->stack_sz = phdr[i].p_memsz; break; } } Modified: stable/10/sys/kern/kern_exec.c ============================================================================== --- stable/10/sys/kern/kern_exec.c Wed Apr 22 10:25:08 2015 (r281847) +++ stable/10/sys/kern/kern_exec.c Wed Apr 22 10:57:00 2015 (r281848) @@ -1038,6 +1038,7 @@ exec_new_vmspace(imgp, sv) struct proc *p = imgp->proc; struct vmspace *vmspace = p->p_vmspace; vm_object_t obj; + struct rlimit rlim_stack; vm_offset_t sv_minuser, stack_addr; vm_map_t map; u_long ssiz; @@ -1087,10 +1088,22 @@ exec_new_vmspace(imgp, sv) } /* Allocate a new stack */ - if (sv->sv_maxssiz != NULL) + if (imgp->stack_sz != 0) { + ssiz = imgp->stack_sz; + PROC_LOCK(p); + lim_rlimit(p, RLIMIT_STACK, &rlim_stack); + PROC_UNLOCK(p); + if (ssiz > rlim_stack.rlim_max) + ssiz = rlim_stack.rlim_max; + if (ssiz > rlim_stack.rlim_cur) { + rlim_stack.rlim_cur = ssiz; + kern_setrlimit(curthread, RLIMIT_STACK, &rlim_stack); + } + } else if (sv->sv_maxssiz != NULL) { ssiz = *sv->sv_maxssiz; - else + } else { ssiz = maxssiz; + } stack_addr = sv->sv_usrstack - ssiz; error = vm_map_stack(map, stack_addr, (vm_size_t)ssiz, obj != NULL && imgp->stack_prot != 0 ? imgp->stack_prot : Modified: stable/10/sys/kern/kern_resource.c ============================================================================== --- stable/10/sys/kern/kern_resource.c Wed Apr 22 10:25:08 2015 (r281847) +++ stable/10/sys/kern/kern_resource.c Wed Apr 22 10:57:00 2015 (r281848) @@ -757,7 +757,12 @@ kern_proc_setrlimit(struct thread *td, s if (newlim != NULL) lim_free(oldlim); - if (which == RLIMIT_STACK) { + if (which == RLIMIT_STACK && + /* + * Skip calls from exec_new_vmspace(), done when stack is + * not mapped yet. + */ + (td != curthread || (p->p_flag & P_INEXEC) == 0)) { /* * Stack is allocated to the max at exec time with only * "rlim_cur" bytes accessible. If stack limit is going Modified: stable/10/sys/sys/imgact.h ============================================================================== --- stable/10/sys/sys/imgact.h Wed Apr 22 10:25:08 2015 (r281847) +++ stable/10/sys/sys/imgact.h Wed Apr 22 10:57:00 2015 (r281848) @@ -80,6 +80,7 @@ struct image_params { unsigned long pagesizes; int pagesizeslen; vm_prot_t stack_prot; + u_long stack_sz; }; #ifdef _KERNEL
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