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-rw-r--r--zfs/lib/libumem/getpcstack.c188
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);
-}