3c90d1ea74
- Introduce per-architecture stack_machdep.c to hold stack_save(9). - Introduce per-architecture machine/stack.h to capture any common definitions required between db_trace.c and stack_machdep.c. - Add new kernel option "options STACK"; we will build in stack(9) if it is defined, or also if "options DDB" is defined to provide compatibility with existing users of stack(9). Add new stack_save_td(9) function, which allows the capture of a stacktrace of another thread rather than the current thread, which the existing stack_save(9) was limited to. It requires that the thread be neither swapped out nor running, which is the responsibility of the consumer to enforce. Update stack(9) man page. Build tested: amd64, arm, i386, ia64, powerpc, sparc64, sun4v Runtime tested: amd64 (rwatson), arm (cognet), i386 (rwatson)
77 lines
2.2 KiB
C
77 lines
2.2 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/systm.h>
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/stack.h>
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#include <machine/vmparam.h>
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#include <machine/pcb.h>
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#include <machine/stack.h>
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static void
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stack_capture(struct stack *st, u_int32_t *frame)
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{
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vm_offset_t callpc;
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stack_zero(st);
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while (1) {
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if (!INKERNEL(frame))
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break;
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callpc = frame[FR_SCP];
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if (stack_put(st, callpc) == -1)
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break;
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frame = (u_int32_t *)(frame[FR_RFP]);
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}
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}
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void
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stack_save_td(struct stack *st, struct thread *td)
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{
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u_int32_t *frame;
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if (TD_IS_SWAPPED(td))
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panic("stack_save_td: swapped");
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if (TD_IS_RUNNING(td))
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panic("stack_save_td: running");
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frame = (u_int32_t *)td->td_pcb->un_32.pcb32_r11;
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stack_capture(st, frame);
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}
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void
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stack_save(struct stack *st)
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{
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u_int32_t *frame;
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frame = (u_int32_t *)__builtin_frame_address(0);
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stack_capture(st, frame);
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}
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