bin/tests/backtrace_test.c

/*
 * Copyright (C) 2009, 2013, 2015, 2016  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/* $Id: backtrace_test.c,v 1.4 2009/09/02 23:48:01 tbox Exp $ */

#include <config.h>

#include <stdio.h>
#include <string.h>

#include <isc/backtrace.h>
#include <isc/print.h>
#include <isc/result.h>

const char *expected_symbols[] = {
    "func3",
    "func2",
    "func1",
    "main"
};

static int
func3() {
    void *tracebuf[16];
    int i, nframes;
    int error = 0;
    const char *fname;
    isc_result_t result;
    unsigned long offset;

    result = isc_backtrace_gettrace(tracebuf, 16, &nframes);
    if (result != ISC_R_SUCCESS) {
        printf("isc_backtrace_gettrace failed: %s\n",
               isc_result_totext(result));
        return (1);
    }

    if (nframes < 4)
        error++;

    for (i = 0; i < 4 && i < nframes; i++) {
        fname = NULL;
        result = isc_backtrace_getsymbol(tracebuf[i], &fname, &offset);
        if (result != ISC_R_SUCCESS) {
            error++;
            continue;
        }
        if (strcmp(fname, expected_symbols[i]) != 0)
            error++;
    }

    if (error) {
        printf("Unexpected result:\n");
        printf("  # of frames: %d (expected: at least 4)\n", nframes);
        printf("  symbols:\n");
        for (i = 0; i < nframes; i++) {
            fname = NULL;
            result = isc_backtrace_getsymbol(tracebuf[i], &fname,
                             &offset);
            if (result == ISC_R_SUCCESS)
                printf("  [%d] %s\n", i, fname);
            else {
                printf("  [%d] %p getsymbol failed: %s\n", i,
                       tracebuf[i], isc_result_totext(result));
            }
        }
    }

    return (error);
}

static int
func2() {
    return (func3());
}

static int
func1() {
    return (func2());
}

int
main() {
    return (func1());
}