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132 lines
4.3 KiB
132 lines
4.3 KiB
/**************************************************************************** |
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* examples/elf/tests/longjmp/longjmp.c |
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* |
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* Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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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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* |
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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 |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <stdio.h> |
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#include <setjmp.h> |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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#define MAIN_VAL 47 |
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#define FUNC_VAL 92 |
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#define LEAF_VAL 163 |
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#define FUNCTION_ARG MAIN_VAL |
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#define LEAF_ARG (FUNCTION_ARG + FUNC_VAL) |
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#define SETJMP_RETURN (LEAF_ARG + LEAF_VAL) |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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static jmp_buf env; |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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static int leaf(int *some_arg) |
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{ |
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int some_local_variable = *some_arg + LEAF_VAL; |
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printf("leaf: received %d\n", *some_arg); |
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if (*some_arg != LEAF_ARG) |
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printf("leaf: ERROR: expected %d\n", LEAF_ARG); |
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printf("leaf: Calling longjmp() with %d\n", some_local_variable); |
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longjmp(env, some_local_variable); |
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/* We should not get here */ |
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return -ERROR; |
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} |
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static int function(int some_arg) |
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{ |
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int some_local_variable = some_arg + FUNC_VAL; |
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int retval; |
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printf("function: received %d\n", some_arg); |
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if (some_arg != FUNCTION_ARG) |
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printf("function: ERROR: expected %d\n", FUNCTION_ARG); |
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printf("function: Calling leaf() with %d\n", some_local_variable); |
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retval = leaf(&some_local_variable); |
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printf("function: ERROR -- leaf returned!\n"); |
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return retval; |
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} |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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int main(int argc, char **argv) |
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{ |
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int value; |
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printf("main: Calling setjmp\n"); |
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value = setjmp(env); |
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printf("main: setjmp returned %d\n", value); |
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if (value == 0) |
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{ |
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printf("main: Normal setjmp return\n"); |
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printf("main: Calling function with %d\n", MAIN_VAL); |
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function(MAIN_VAL); |
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printf("main: ERROR -- function returned!\n"); |
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return 1; |
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} |
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else if (value != SETJMP_RETURN) |
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{ |
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printf("main: ERROR: Expected %d\n", SETJMP_RETURN); |
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return 1; |
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} |
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else |
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{ |
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printf("main: SUCCESS: setjmp return from longjmp call\n"); |
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return 0; |
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} |
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} |
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