610141cebb
running thread. It is currently implemented only on amd64 and i386; on these architectures, it is implemented by raising an NMI on the CPU on which the target thread is currently running. Unlike stack_save_td(), it may fail, for example if the thread is running in user mode. This change also modifies the kern.proc.kstack sysctl to use this function, so that stacks of running threads are shown in the output of "procstat -kk". This is handy for debugging threads that are stuck in a busy loop. Reviewed by: bdrewery, jhb, kib Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D3256
66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
/*-
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* Copyright (c) 2005 Antoine Brodin
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_STACK_H_
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#define _SYS_STACK_H_
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#include <sys/_stack.h>
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struct sbuf;
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/* MI Routines. */
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struct stack *stack_create(void);
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void stack_destroy(struct stack *);
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int stack_put(struct stack *, vm_offset_t);
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void stack_copy(const struct stack *, struct stack *);
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void stack_zero(struct stack *);
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void stack_print(const struct stack *);
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void stack_print_ddb(const struct stack *);
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void stack_print_short(const struct stack *);
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void stack_print_short_ddb(const struct stack *);
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void stack_sbuf_print(struct sbuf *, const struct stack *);
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void stack_sbuf_print_ddb(struct sbuf *, const struct stack *);
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#ifdef KTR
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void stack_ktr(u_int, const char *, int, const struct stack *,
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u_int, int);
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#define CTRSTACK(m, st, depth, cheap) do { \
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if (KTR_COMPILE & (m)) \
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stack_ktr((m), __FILE__, __LINE__, st, depth, cheap); \
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} while(0)
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#else
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#define CTRSTACK(m, st, depth, cheap)
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#endif
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/* MD Routines. */
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struct thread;
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void stack_save(struct stack *);
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void stack_save_td(struct stack *, struct thread *);
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int stack_save_td_running(struct stack *, struct thread *);
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#endif
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