| 1 | /*
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| 2 | * Copyright (c) 2011 Martin Decky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libc
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | #include <assert.h>
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| 34 | #include <stdio.h>
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| 35 | #include <io/klog.h>
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| 36 | #include <stdlib.h>
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| 37 | #include <atomic.h>
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| 38 | #include <stacktrace.h>
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| 39 |
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| 40 | #define MSG_START "Assertion failed ("
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| 41 | #define MSG_FILE ") in file \""
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| 42 | #define MSG_LINE "\", line "
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| 43 | #define MSG_END ".\n"
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| 44 |
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| 45 | static atomic_t failed_asserts;
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| 46 |
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| 47 | void assert_abort(const char *cond, const char *file, const char *line)
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| 48 | {
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| 49 | /*
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| 50 | * Send the message safely to klog. Nested asserts should not occur.
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| 51 | */
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| 52 | klog_write(MSG_START, str_size(MSG_START));
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| 53 | klog_write(cond, str_size(cond));
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| 54 | klog_write(MSG_FILE, str_size(MSG_FILE));
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| 55 | klog_write(file, str_size(file));
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| 56 | klog_write(MSG_LINE, str_size(MSG_LINE));
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| 57 | klog_write(line, str_size(line));
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| 58 | klog_write(MSG_END, str_size(MSG_END));
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| 59 |
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| 60 | /*
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| 61 | * Check if this is a nested or parallel assert.
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| 62 | */
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| 63 | if (atomic_postinc(&failed_asserts))
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| 64 | abort();
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| 65 |
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| 66 | /*
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| 67 | * Attempt to print the message to standard output and display
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| 68 | * the stack trace. These operations can theoretically trigger nested
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| 69 | * assertions.
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| 70 | */
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| 71 | printf(MSG_START "%s" MSG_FILE "%s" MSG_LINE "%s" MSG_END,
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| 72 | cond, file, line);
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| 73 | stacktrace_print();
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| 74 |
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| 75 | abort();
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| 76 | }
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| 77 |
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| 78 | /** @}
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| 79 | */
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