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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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 3 of the License, or
(at your option) any later version.
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
*/
#include "ch.h"
#include "test.h"
/**
* @page test_heap Memory Heap test
*
* File: @ref testheap.c
*
* <h2>Description</h2>
* This module implements the test sequence for the @ref heaps subsystem.
*
* <h2>Objective</h2>
* Objective of the test module is to cover 100% of the @ref heaps subsystem.
*
* <h2>Preconditions</h2>
* The module requires the following kernel options:
* - @p CH_USE_HEAP
* .
* In case some of the required options are not enabled then some or all tests
* may be skipped.
*
* <h2>Test Cases</h2>
* - @subpage test_heap_001
* .
* @file testheap.c
* @brief Heap test source file
* @file testheap.h
* @brief Heap header file
*/
#if CH_USE_HEAP
#define SIZE 16
static MemoryHeap test_heap;
/**
* @page test_heap_001 Allocation and fragmentation test
*
* <h2>Description</h2>
* Series of allocations/deallocations are performed in carefully designed
* sequences in order to stimulate all the possible code paths inside the
* allocator.<br>
* The test expects to find the heap back to the initial status after each
* sequence.
*/
static void heap1_setup(void) {
chHeapInit(&test_heap, test.buffer, sizeof(union test_buffers));
}
static void heap1_execute(void) {
void *p1, *p2, *p3;
size_t n, sz;
/* Unrelated, for coverage only.*/
(void)chCoreStatus();
/*
* Test on the default heap in order to cover the core allocator at
* least one time.
*/
(void)chHeapStatus(NULL, &sz);
p1 = chHeapAlloc(NULL, SIZE);
test_assert(1, p1 != NULL, "allocation failed");
chHeapFree(p1);
p1 = chHeapAlloc(NULL, (size_t)-256);
test_assert(2, p1 == NULL, "allocation not failed");
/* Initial local heap state.*/
(void)chHeapStatus(&test_heap, &sz);
/* Same order.*/
p1 = chHeapAlloc(&test_heap, SIZE);
p2 = chHeapAlloc(&test_heap, SIZE);
p3 = chHeapAlloc(&test_heap, SIZE);
chHeapFree(p1); /* Does not merge.*/
chHeapFree(p2); /* Merges backward.*/
chHeapFree(p3); /* Merges both sides.*/
test_assert(3, chHeapStatus(&test_heap, &n) == 1, "heap fragmented");
/* Reverse order.*/
p1 = chHeapAlloc(&test_heap, SIZE);
p2 = chHeapAlloc(&test_heap, SIZE);
p3 = chHeapAlloc(&test_heap, SIZE);
chHeapFree(p3); /* Merges forward.*/
chHeapFree(p2); /* Merges forward.*/
chHeapFree(p1); /* Merges forward.*/
test_assert(4, chHeapStatus(&test_heap, &n) == 1, "heap fragmented");
/* Small fragments handling.*/
p1 = chHeapAlloc(&test_heap, SIZE + 1);
p2 = chHeapAlloc(&test_heap, SIZE);
chHeapFree(p1);
test_assert(5, chHeapStatus(&test_heap, &n) == 2, "invalid state");
p1 = chHeapAlloc(&test_heap, SIZE);
/* Note, the first situation happens when the alignment size is smaller
than the header size, the second in the other cases.*/
test_assert(6, (chHeapStatus(&test_heap, &n) == 1) ||
(chHeapStatus(&test_heap, &n) == 2), "heap fragmented");
chHeapFree(p2);
chHeapFree(p1);
test_assert(7, chHeapStatus(&test_heap, &n) == 1, "heap fragmented");
/* Skip fragment handling.*/
p1 = chHeapAlloc(&test_heap, SIZE);
p2 = chHeapAlloc(&test_heap, SIZE);
chHeapFree(p1);
test_assert(8, chHeapStatus(&test_heap, &n) == 2, "invalid state");
p1 = chHeapAlloc(&test_heap, SIZE * 2); /* Skips first fragment.*/
chHeapFree(p1);
chHeapFree(p2);
test_assert(9, chHeapStatus(&test_heap, &n) == 1, "heap fragmented");
/* Allocate all handling.*/
(void)chHeapStatus(&test_heap, &n);
p1 = chHeapAlloc(&test_heap, n);
test_assert(10, chHeapStatus(&test_heap, &n) == 0, "not empty");
chHeapFree(p1);
test_assert(11, chHeapStatus(&test_heap, &n) == 1, "heap fragmented");
test_assert(12, n == sz, "size changed");
}
ROMCONST struct testcase testheap1 = {
"Heap, allocation and fragmentation test",
heap1_setup,
NULL,
heap1_execute
};
#endif /* CH_USE_HEAP.*/
/**
* @brief Test sequence for heap.
*/
ROMCONST struct testcase * ROMCONST patternheap[] = {
#if CH_USE_HEAP
&testheap1,
#endif
NULL
};
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