diff options
Diffstat (limited to 'zfs/lib/libumem/getpcstack.c')
| -rw-r--r-- | zfs/lib/libumem/getpcstack.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/zfs/lib/libumem/getpcstack.c b/zfs/lib/libumem/getpcstack.c deleted file mode 100644 index 8c3a47e19..000000000 --- a/zfs/lib/libumem/getpcstack.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ - -/* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. - */ - -#pragma ident "%Z%%M% %I% %E% SMI" - -#include "misc.h" -#include <ucontext.h> -#include <sys/frame.h> -#include <sys/stack.h> -#include <stdio.h> - -#if defined(__sparc) || defined(__sparcv9) -extern void flush_windows(void); -#define UMEM_FRAMESIZE MINFRAME - -#elif defined(__i386) || defined(__amd64) -/* - * On x86, MINFRAME is defined to be 0, but we want to be sure we can - * dereference the entire frame structure. - */ -#define UMEM_FRAMESIZE (sizeof (struct frame)) - -#else -#error needs update for new architecture -#endif - -/* - * Get a pc-only stacktrace. Used for kmem_alloc() buffer ownership tracking. - * Returns MIN(current stack depth, pcstack_limit). - */ -/*ARGSUSED*/ -int -getpcstack(uintptr_t *pcstack, int pcstack_limit, int check_signal) -{ - struct frame *fp; - struct frame *nextfp, *minfp; - int depth = 0; - uintptr_t base = 0; - size_t size = 0; -#ifndef UMEM_STANDALONE - int on_altstack = 0; - uintptr_t sigbase = 0; - size_t sigsize = 0; - - stack_t st; - - if (stack_getbounds(&st) != 0) { - if (thr_stksegment(&st) != 0 || - (uintptr_t)st.ss_sp < st.ss_size) { - return (0); /* unable to get stack bounds */ - } - /* - * thr_stksegment(3C) has a slightly different interface than - * stack_getbounds(3C) -- correct it - */ - st.ss_sp = (void *)(((uintptr_t)st.ss_sp) - st.ss_size); - st.ss_flags = 0; /* can't be on-stack */ - } - on_altstack = (st.ss_flags & SS_ONSTACK); - - if (st.ss_size != 0) { - base = (uintptr_t)st.ss_sp; - size = st.ss_size; - } else { - /* - * If size == 0, then ss_sp is the *top* of the stack. - * - * Since we only allow increasing frame pointers, and we - * know our caller set his up correctly, we can treat ss_sp - * as an upper bound safely. - */ - base = 0; - size = (uintptr_t)st.ss_sp; - } - - if (check_signal != 0) { - void (*sigfunc)() = NULL; - int sigfuncsize = 0; - extern void thr_sighndlrinfo(void (**)(), int *); - - thr_sighndlrinfo(&sigfunc, &sigfuncsize); - sigbase = (uintptr_t)sigfunc; - sigsize = sigfuncsize; - } -#else /* UMEM_STANDALONE */ - base = (uintptr_t)umem_min_stack; - size = umem_max_stack - umem_min_stack; -#endif - - /* - * shorten size so that fr_savfp and fr_savpc will be within the stack - * bounds. - */ - if (size >= UMEM_FRAMESIZE - 1) - size -= (UMEM_FRAMESIZE - 1); - else - size = 0; - -#if defined(__sparc) || defined(__sparcv9) - flush_windows(); -#endif - - /* LINTED alignment */ - fp = (struct frame *)((caddr_t)getfp() + STACK_BIAS); - - minfp = fp; - - if (((uintptr_t)fp - base) >= size) - return (0); /* the frame pointer isn't in our stack */ - - while (depth < pcstack_limit) { - uintptr_t tmp; - - /* LINTED alignment */ - nextfp = (struct frame *)((caddr_t)fp->fr_savfp + STACK_BIAS); - tmp = (uintptr_t)nextfp; - - /* - * Check nextfp for validity. It must be properly aligned, - * increasing compared to the last %fp (or the top of the - * stack we just switched to), and it must be inside - * [base, base + size). - */ - if (tmp != SA(tmp)) - break; - else if (nextfp <= minfp || (tmp - base) >= size) { -#ifndef UMEM_STANDALONE - if (tmp == NULL || !on_altstack) - break; - /* - * If we're on an alternate signal stack, try jumping - * to the main thread stack. - * - * If the main thread stack has an unlimited size, we - * punt, since we don't know where the frame pointer's - * been. - * - * (thr_stksegment() returns the *top of stack* - * in ss_sp, not the bottom) - */ - if (thr_stksegment(&st) == 0) { - if (st.ss_size >= (uintptr_t)st.ss_sp || - st.ss_size < UMEM_FRAMESIZE - 1) - break; - - on_altstack = 0; - base = (uintptr_t)st.ss_sp - st.ss_size; - size = st.ss_size - (UMEM_FRAMESIZE - 1); - minfp = (struct frame *)base; - continue; /* try again */ - } -#endif - break; - } - -#ifndef UMEM_STANDALONE - if (check_signal && (fp->fr_savpc - sigbase) <= sigsize) - umem_panic("called from signal handler"); -#endif - pcstack[depth++] = fp->fr_savpc; - fp = nextfp; - minfp = fp; - } - return (depth); -} |