demo/common/callstack.c

/*
 * 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 (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/reg.h>
#include <sys/frame.h>
#include <sys/stack.h>
#include <sys/machelf.h>
#include <procfs.h>

#include "rdb.h"

#ifndef STACK_BIAS
#define STACK_BIAS  0
#endif

static int
get_frame(struct ps_prochandle *ph, psaddr_t fp, struct frame *frm)
{
#if defined(_LP64)
    /*
     * Use special structures to read a 32-bit process
     * from a 64-bit process.
     */
    if (ph->pp_dmodel == PR_MODEL_ILP32) {
        struct frame32  frm32;

        if (ps_pread(ph, (psaddr_t)fp, (char *)&frm32,
            sizeof (struct frame32)) != PS_OK) {
            (void) printf("stack trace: bad frame pointer: 0x%lx\n",
                fp);
            return (-1);
        }

        frm->fr_savpc = (long)frm32.fr_savpc;
#if defined(__sparcv9)
        frm->fr_savfp = (struct frame *)(uintptr_t)frm32.fr_savfp;
#elif   defined(__amd64)
        frm->fr_savfp = (long)frm32.fr_savfp;
#endif
        return (0);
    }
#endif  /* defined(_LP64) */

    if (ps_pread(ph, (psaddr_t)fp + STACK_BIAS, (char *)frm,
        sizeof (struct frame)) != PS_OK) {
        (void) printf("stack trace: bad frame pointer: 0x%lx\n", fp);
        return (-1);
    }
    return (0);
}

/*
 * Relatively architecture neutral routine to display the callstack.
 */
void
CallStack(struct ps_prochandle *ph)
{
    pstatus_t   pstatus;
    greg_t      fp;
    struct frame    frm;
    char        *symstr;

    if (pread(ph->pp_statusfd, &pstatus, sizeof (pstatus), 0) == -1)
        perr("cs: reading status");

    symstr = print_address_ps(ph, (ulong_t)pstatus.pr_lwp.pr_reg[R_PC],
        FLG_PAP_SONAME);
    (void) printf(" 0x%08x:%-17s\n", EC_WORD(pstatus.pr_lwp.pr_reg[R_PC]),
        symstr);

    fp = pstatus.pr_lwp.pr_reg[R_FP];

    while (fp) {
        if (get_frame(ph, (psaddr_t)fp, &frm) == -1)
            return;
        if (frm.fr_savpc) {
            symstr = print_address_ps(ph, (ulong_t)frm.fr_savpc,
                FLG_PAP_SONAME);
            (void) printf(" 0x%08x:%-17s\n", EC_WORD(frm.fr_savpc),
                symstr);
        }
        fp = (greg_t)frm.fr_savfp;
    }
}