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//==========================================================================

//

//      tassert3.cxx

//

//      Assertion test case                                                                

//

//==========================================================================

//####COPYRIGHTBEGIN####

//                                                                          

// ----------------------------------------------------------------------------

// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.

//

// This file is part of the eCos host tools.

//

// This program is free software; you can redistribute it and/or modify it 

// under the terms of the GNU General Public License as published by the Free 

// Software Foundation; either version 2 of the License, or (at your option) 

// any later version.

// 

// This program is distributed in the hope that it will be useful, but WITHOUT 

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 

// more details.

// 

// You should have received a copy of the GNU General Public License along with

// this program; if not, write to the Free Software Foundation, Inc., 

// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

//

// ----------------------------------------------------------------------------

//                                                                          

//####COPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####                                             

//

// Author(s):           bartv

// Contributors:        bartv

// Date:                1998-12-21

// Purpose:

// Description:         Check the host extensions.

//

//####DESCRIPTIONEND####

//==========================================================================

// -------------------------------------------------------------------------

// The host-side assertion support has three extensions to the generic

// assertion support:

//

// 1) cyg_assert_install_failure_handler()

//    Provide an alternative handler that gets invoked when an

//    assertion fails.

//

// 2) cyg_assert_install_failure_callback()

//    Provide an additional callback that should get invoked when an

//    assertion triggers to provide additional information.

//

// 3) cyg_assert_failure_invoke_callbacks()

//    Used by (1) to call the functions installed via (2).

//

// The tests make use of setjmp()/longjmp() buffer to avoid having to

// do lots of output parsing in the DejaGnu driver.

#define CYG_DECLARE_HOST_ASSERTION_SUPPORT

#define CYGDBG_USE_ASSERTS

#define CYGDBG_INFRA_DEBUG_PRECONDITIONS

#define CYGDBG_INFRA_DEBUG_POSTCONDITIONS

#define CYGDBG_INFRA_DEBUG_LOOP_INVARIANTS

#define CYGDBG_INFRA_DEBUG_INVARIANTS

#include <cyg/infra/testcase.h>

#include <cyg/infra/cyg_ass.h>

#include <cstdlib>

#include <csetjmp>

#include <cstring>

// Forward declarations of some integers to allow the line number to be

// checked.

extern cyg_uint32 main_start, main_end;

// This is used to "recover" from an assertion failure

static jmp_buf setjmp_buffer;

// A constant string useful for comparisons.

static const char message[] = "fail";

// Some state information to make sure that the world is in the expected

// state

bool expecting_failure1         = false;

bool expecting_failure2         = false;

bool expecting_failure3         = false;

// -------------------------------------------------------------------------

// The first assertion handler. This is used to check that the arguments

// make sense.

extern "C"

bool

failure_handler1(const char* fn, const char* file, cyg_uint32 line, const char* msg)

{

    if (!expecting_failure1) {

        CYG_TEST_FAIL("assertion failure handler1 invoked unexpectedly");

    }

    expecting_failure1 = false;

    // The function should be 0 or contain main

    if (0 != fn) {

        if (0 == strstr(fn, "main")) {

            CYG_TEST_FAIL("invalid function name passed to assertion failure handler");

        }

    }

    // The file name should always be valid and contain tassert3.cxx.

    // It may contain path information as well.

    if ( (0 == file) || (0 == strstr(file, "tassert3.cxx"))) {

        CYG_TEST_FAIL("invalid file name passed to assertion failure handler");

    }

    // The line number can be validated against some globals.

    if ((line <= main_start) || (line >= main_end)) {

        CYG_TEST_FAIL("invalid line number passed to assertion failure handler");

    }

    // The message passed is known.

    if (0 != strcmp(msg, message)) {

        CYG_TEST_FAIL("invalid message passed to assertion failure handler");

    }

    CYG_TEST_PASS("application-specific assertion failure handler");

    // Everything OK, back to main()

    longjmp(setjmp_buffer, 1);

    CYG_TEST_FAIL_FINISH("longjmp() is not functional");

    return false;

}

// -------------------------------------------------------------------------

// A second assertion handler. This is used to make sure that assertion

// failure handlers can be overwritten.

extern "C"

bool

failure_handler2(const char* fn, const char* file, cyg_uint32 line, const char* msg)

{

    if (!expecting_failure2) {

        CYG_TEST_FAIL("assertion failure handler2 invoked incorrectly");

    }

    expecting_failure2 = false;

    CYG_TEST_PASS("assertion failure handlers can be replaced");

    longjmp(setjmp_buffer, 1);

    CYG_TEST_FAIL_FINISH("longjmp() is not functional");

    return false;

}

// -------------------------------------------------------------------------

// The third assertion handler. This time a couple of output callbacks are

// installed and the main failure handler has to invoke the output callbacks.

// A number of statics are used to make sure everything works ok.

static const char callback1_title[] = "callback1_header";

static const char callback2_title[] = "callback2_header";

static const char callback2_data[]  = "callback2 data\n";

static bool seen_callback1_title    = false;

static bool seen_callback2_title    = false;

static bool callback1_done          = false;

static bool callback2_done          = false;

static int  number_of_headers       = 0;

static bool callback1_invoked       = false;

static bool callback2_invoked       = false;

static int  number_of_lines_seen    = 0;

const  int  callback2_lines         = 16;

static int  callback2_lines_seen    = 0;

static int  number_of_trailers      = 0;

extern "C"

void

callback1(void (*outputfn)(const char*))

{

    if (callback1_invoked) {

        CYG_TEST_FAIL("callback1 invoked multiple times");

    }

    callback1_invoked = true;

    // This callback does nothing.

}

extern "C"

void

callback2(void (*outputfn)(const char*))

{

    if (callback2_invoked) {

        CYG_TEST_FAIL("callback2 invoked multiple times");

    }

    callback2_invoked = true;

    for (int i = 0; i < callback2_lines; i++) {

        (*outputfn)(callback2_data);

    }

}

// handle_callback_header() should be invoked at least twice,

// once with callback1_header and once with callback2_header

extern "C"

void

handle_callback_header(const char* name)

{

    number_of_headers++;

    if (0 == strcmp(name, callback1_title)) {

        if (seen_callback1_title) {

            CYG_TEST_FAIL("callback1 title seen multiple times");

        } else {

            seen_callback1_title = true;

        }

    }

    if (0 == strcmp(name, callback2_title)) {

        if (seen_callback2_title) {

            CYG_TEST_FAIL("callback2 title seen multiple times");

        } else {

            seen_callback2_title = true;

        }

    }

}

// The body output function should be invoked zero times for

// callback1 and a fixed number of times for callback2.

extern "C"

void

handle_callback_body(const char* data)

{

    number_of_lines_seen++;

    if (seen_callback1_title && !callback1_done) {

        CYG_TEST_FAIL("callback1 should not perform any output");

    }

    if (seen_callback2_title && !callback2_done) {

        callback2_lines_seen++;

        if (0 != strcmp(data, callback2_data)) {

            CYG_TEST_FAIL("callback2 has generated incorrect data");

        }

    }

}

// The trailer output function should be invoked at least twice, once

// for each callback.

extern "C"

void

handle_callback_trailer(void)

{

    if (0 == number_of_headers) {

        CYG_TEST_FAIL("callback trailer seen before header");

    }

    number_of_trailers++;

    if (seen_callback1_title && !callback1_done) {

        callback1_done = true;

    }

    if (seen_callback2_title && !callback2_done) {

        callback2_done = true;

    }

}

// This is the failure handler. It causes the various callbacks to run, then

// checks the resulting values of the statics.

extern "C"

bool

failure_handler3(const char* fn, const char* file, cyg_uint32 line, const char* msg)

{

    if (!expecting_failure3) {

        CYG_TEST_FAIL("assertion failure handler3 invoked incorrectly");

    }

    expecting_failure3 = false;

    cyg_assert_failure_invoke_callbacks(

        &handle_callback_header,

        &handle_callback_body,

        &handle_callback_trailer);

    bool all_ok = true;

    if (!seen_callback1_title) {

        CYG_TEST_FAIL("callback1's title not seen");

        all_ok = false;

    }

    if (!seen_callback2_title) {

        CYG_TEST_FAIL("callback2's title not seen");

        all_ok = false;

    }

    if (number_of_headers != number_of_trailers) {

        CYG_TEST_FAIL("headers and trailers do not match up");

        all_ok = false;

    }

    if (!callback1_done) {

        CYG_TEST_FAIL("callback1 did not finish");

        all_ok = false;

    }

    if (!callback2_done) {

        CYG_TEST_FAIL("callback2 did not finish");

        all_ok = false;

    }

    if (number_of_lines_seen < callback2_lines) {

        CYG_TEST_FAIL("total number of output lines is less than expected");

        all_ok = false;

    }

    if (callback2_lines_seen != callback2_lines) {

        CYG_TEST_FAIL("callback2 generated the wrong number of lines");

        all_ok = false;

    }

    if (all_ok) {

        CYG_TEST_PASS("assertion callbacks");

    }

    longjmp(setjmp_buffer, 1);

    CYG_TEST_FAIL_FINISH("longjmp() is not functional");

    return false;

}

// ----------------------------------------------------------------------------

// main(). Perform the various assertion tests in order.

cyg_uint32 main_start = (cyg_uint32) __LINE__;

int

main(int argc, char** argv)

{

    expecting_failure1 = true;

    // First check, a very basic assertion invocation.

    if (setjmp(setjmp_buffer) == 0) {

        cyg_assert_install_failure_handler(&failure_handler1);

        CYG_FAIL(message);

        CYG_TEST_FAIL("assertion did not trigger");

    }

    expecting_failure1 = false;

    expecting_failure2 = true;

    // Now try installing a different assertion handler.

    if (setjmp(setjmp_buffer) == 0) {

        cyg_assert_install_failure_handler(&failure_handler2);

        CYG_FAIL(message);

        CYG_TEST_FAIL("assertion did not trigger");

    }

    expecting_failure2 = false;

    expecting_failure3 = true;

    if (setjmp(setjmp_buffer) == 0) {

        cyg_assert_install_failure_callback(callback1_title, &callback1);

        cyg_assert_install_failure_callback(callback2_title, &callback2);

        cyg_assert_install_failure_handler(&failure_handler3);

        CYG_FAIL(message);

        CYG_TEST_FAIL("assertion did not trigger");

    }

    expecting_failure3 = false;

    return 0;

}

cyg_uint32 main_end = (cyg_uint32) __LINE__;