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#include "test/jemalloc_test.h"
#include "test/nbits.h"
static void
test_bitmap_initializer_body(const bitmap_info_t *binfo, size_t nbits) {
bitmap_info_t binfo_dyn;
bitmap_info_init(&binfo_dyn, nbits);
expect_zu_eq(bitmap_size(binfo), bitmap_size(&binfo_dyn),
"Unexpected difference between static and dynamic initialization, "
"nbits=%zu", nbits);
expect_zu_eq(binfo->nbits, binfo_dyn.nbits,
"Unexpected difference between static and dynamic initialization, "
"nbits=%zu", nbits);
#ifdef BITMAP_USE_TREE
expect_u_eq(binfo->nlevels, binfo_dyn.nlevels,
"Unexpected difference between static and dynamic initialization, "
"nbits=%zu", nbits);
{
unsigned i;
for (i = 0; i < binfo->nlevels; i++) {
expect_zu_eq(binfo->levels[i].group_offset,
binfo_dyn.levels[i].group_offset,
"Unexpected difference between static and dynamic "
"initialization, nbits=%zu, level=%u", nbits, i);
}
}
#else
expect_zu_eq(binfo->ngroups, binfo_dyn.ngroups,
"Unexpected difference between static and dynamic initialization");
#endif
}
TEST_BEGIN(test_bitmap_initializer) {
#define NB(nbits) { \
if (nbits <= BITMAP_MAXBITS) { \
bitmap_info_t binfo = \
BITMAP_INFO_INITIALIZER(nbits); \
test_bitmap_initializer_body(&binfo, nbits); \
} \
}
NBITS_TAB
#undef NB
}
TEST_END
static size_t
test_bitmap_size_body(const bitmap_info_t *binfo, size_t nbits,
size_t prev_size) {
size_t size = bitmap_size(binfo);
expect_zu_ge(size, (nbits >> 3),
"Bitmap size is smaller than expected");
expect_zu_ge(size, prev_size, "Bitmap size is smaller than expected");
return size;
}
TEST_BEGIN(test_bitmap_size) {
size_t nbits, prev_size;
prev_size = 0;
for (nbits = 1; nbits <= BITMAP_MAXBITS; nbits++) {
bitmap_info_t binfo;
bitmap_info_init(&binfo, nbits);
prev_size = test_bitmap_size_body(&binfo, nbits, prev_size);
}
#define NB(nbits) { \
bitmap_info_t binfo = BITMAP_INFO_INITIALIZER(nbits); \
prev_size = test_bitmap_size_body(&binfo, nbits, \
prev_size); \
}
prev_size = 0;
NBITS_TAB
#undef NB
}
TEST_END
static void
test_bitmap_init_body(const bitmap_info_t *binfo, size_t nbits) {
size_t i;
bitmap_t *bitmap = (bitmap_t *)malloc(bitmap_size(binfo));
expect_ptr_not_null(bitmap, "Unexpected malloc() failure");
bitmap_init(bitmap, binfo, false);
for (i = 0; i < nbits; i++) {
expect_false(bitmap_get(bitmap, binfo, i),
"Bit should be unset");
}
bitmap_init(bitmap, binfo, true);
for (i = 0; i < nbits; i++) {
expect_true(bitmap_get(bitmap, binfo, i), "Bit should be set");
}
free(bitmap);
}
TEST_BEGIN(test_bitmap_init) {
size_t nbits;
for (nbits = 1; nbits <= BITMAP_MAXBITS; nbits++) {
bitmap_info_t binfo;
bitmap_info_init(&binfo, nbits);
test_bitmap_init_body(&binfo, nbits);
}
#define NB(nbits) { \
bitmap_info_t binfo = BITMAP_INFO_INITIALIZER(nbits); \
test_bitmap_init_body(&binfo, nbits); \
}
NBITS_TAB
#undef NB
}
TEST_END
static void
test_bitmap_set_body(const bitmap_info_t *binfo, size_t nbits) {
size_t i;
bitmap_t *bitmap = (bitmap_t *)malloc(bitmap_size(binfo));
expect_ptr_not_null(bitmap, "Unexpected malloc() failure");
bitmap_init(bitmap, binfo, false);
for (i = 0; i < nbits; i++) {
bitmap_set(bitmap, binfo, i);
}
expect_true(bitmap_full(bitmap, binfo), "All bits should be set");
free(bitmap);
}
TEST_BEGIN(test_bitmap_set) {
size_t nbits;
for (nbits = 1; nbits <= BITMAP_MAXBITS; nbits++) {
bitmap_info_t binfo;
bitmap_info_init(&binfo, nbits);
test_bitmap_set_body(&binfo, nbits);
}
#define NB(nbits) { \
bitmap_info_t binfo = BITMAP_INFO_INITIALIZER(nbits); \
test_bitmap_set_body(&binfo, nbits); \
}
NBITS_TAB
#undef NB
}
TEST_END
static void
test_bitmap_unset_body(const bitmap_info_t *binfo, size_t nbits) {
size_t i;
bitmap_t *bitmap = (bitmap_t *)malloc(bitmap_size(binfo));
expect_ptr_not_null(bitmap, "Unexpected malloc() failure");
bitmap_init(bitmap, binfo, false);
for (i = 0; i < nbits; i++) {
bitmap_set(bitmap, binfo, i);
}
expect_true(bitmap_full(bitmap, binfo), "All bits should be set");
for (i = 0; i < nbits; i++) {
bitmap_unset(bitmap, binfo, i);
}
for (i = 0; i < nbits; i++) {
bitmap_set(bitmap, binfo, i);
}
expect_true(bitmap_full(bitmap, binfo), "All bits should be set");
free(bitmap);
}
TEST_BEGIN(test_bitmap_unset) {
size_t nbits;
for (nbits = 1; nbits <= BITMAP_MAXBITS; nbits++) {
bitmap_info_t binfo;
bitmap_info_init(&binfo, nbits);
test_bitmap_unset_body(&binfo, nbits);
}
#define NB(nbits) { \
bitmap_info_t binfo = BITMAP_INFO_INITIALIZER(nbits); \
test_bitmap_unset_body(&binfo, nbits); \
}
NBITS_TAB
#undef NB
}
TEST_END
static void
test_bitmap_xfu_body(const bitmap_info_t *binfo, size_t nbits) {
bitmap_t *bitmap = (bitmap_t *)malloc(bitmap_size(binfo));
expect_ptr_not_null(bitmap, "Unexpected malloc() failure");
bitmap_init(bitmap, binfo, false);
/* Iteratively set bits starting at the beginning. */
for (size_t i = 0; i < nbits; i++) {
expect_zu_eq(bitmap_ffu(bitmap, binfo, 0), i,
"First unset bit should be just after previous first unset "
"bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, (i > 0) ? i-1 : i), i,
"First unset bit should be just after previous first unset "
"bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, i), i,
"First unset bit should be just after previous first unset "
"bit");
expect_zu_eq(bitmap_sfu(bitmap, binfo), i,
"First unset bit should be just after previous first unset "
"bit");
}
expect_true(bitmap_full(bitmap, binfo), "All bits should be set");
/*
* Iteratively unset bits starting at the end, and verify that
* bitmap_sfu() reaches the unset bits.
*/
for (size_t i = nbits - 1; i < nbits; i--) { /* (nbits..0] */
bitmap_unset(bitmap, binfo, i);
expect_zu_eq(bitmap_ffu(bitmap, binfo, 0), i,
"First unset bit should the bit previously unset");
expect_zu_eq(bitmap_ffu(bitmap, binfo, (i > 0) ? i-1 : i), i,
"First unset bit should the bit previously unset");
expect_zu_eq(bitmap_ffu(bitmap, binfo, i), i,
"First unset bit should the bit previously unset");
expect_zu_eq(bitmap_sfu(bitmap, binfo), i,
"First unset bit should the bit previously unset");
bitmap_unset(bitmap, binfo, i);
}
expect_false(bitmap_get(bitmap, binfo, 0), "Bit should be unset");
/*
* Iteratively set bits starting at the beginning, and verify that
* bitmap_sfu() looks past them.
*/
for (size_t i = 1; i < nbits; i++) {
bitmap_set(bitmap, binfo, i - 1);
expect_zu_eq(bitmap_ffu(bitmap, binfo, 0), i,
"First unset bit should be just after the bit previously "
"set");
expect_zu_eq(bitmap_ffu(bitmap, binfo, (i > 0) ? i-1 : i), i,
"First unset bit should be just after the bit previously "
"set");
expect_zu_eq(bitmap_ffu(bitmap, binfo, i), i,
"First unset bit should be just after the bit previously "
"set");
expect_zu_eq(bitmap_sfu(bitmap, binfo), i,
"First unset bit should be just after the bit previously "
"set");
bitmap_unset(bitmap, binfo, i);
}
expect_zu_eq(bitmap_ffu(bitmap, binfo, 0), nbits - 1,
"First unset bit should be the last bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, (nbits > 1) ? nbits-2 : nbits-1),
nbits - 1, "First unset bit should be the last bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, nbits - 1), nbits - 1,
"First unset bit should be the last bit");
expect_zu_eq(bitmap_sfu(bitmap, binfo), nbits - 1,
"First unset bit should be the last bit");
expect_true(bitmap_full(bitmap, binfo), "All bits should be set");
/*
* Bubble a "usu" pattern through the bitmap and verify that
* bitmap_ffu() finds the correct bit for all five min_bit cases.
*/
if (nbits >= 3) {
for (size_t i = 0; i < nbits-2; i++) {
bitmap_unset(bitmap, binfo, i);
bitmap_unset(bitmap, binfo, i+2);
if (i > 0) {
expect_zu_eq(bitmap_ffu(bitmap, binfo, i-1), i,
"Unexpected first unset bit");
}
expect_zu_eq(bitmap_ffu(bitmap, binfo, i), i,
"Unexpected first unset bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, i+1), i+2,
"Unexpected first unset bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, i+2), i+2,
"Unexpected first unset bit");
if (i + 3 < nbits) {
expect_zu_eq(bitmap_ffu(bitmap, binfo, i+3),
nbits, "Unexpected first unset bit");
}
expect_zu_eq(bitmap_sfu(bitmap, binfo), i,
"Unexpected first unset bit");
expect_zu_eq(bitmap_sfu(bitmap, binfo), i+2,
"Unexpected first unset bit");
}
}
/*
* Unset the last bit, bubble another unset bit through the bitmap, and
* verify that bitmap_ffu() finds the correct bit for all four min_bit
* cases.
*/
if (nbits >= 3) {
bitmap_unset(bitmap, binfo, nbits-1);
for (size_t i = 0; i < nbits-1; i++) {
bitmap_unset(bitmap, binfo, i);
if (i > 0) {
expect_zu_eq(bitmap_ffu(bitmap, binfo, i-1), i,
"Unexpected first unset bit");
}
expect_zu_eq(bitmap_ffu(bitmap, binfo, i), i,
"Unexpected first unset bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, i+1), nbits-1,
"Unexpected first unset bit");
expect_zu_eq(bitmap_ffu(bitmap, binfo, nbits-1),
nbits-1, "Unexpected first unset bit");
expect_zu_eq(bitmap_sfu(bitmap, binfo), i,
"Unexpected first unset bit");
}
expect_zu_eq(bitmap_sfu(bitmap, binfo), nbits-1,
"Unexpected first unset bit");
}
free(bitmap);
}
TEST_BEGIN(test_bitmap_xfu) {
size_t nbits, nbits_max;
/* The test is O(n^2); large page sizes may slow down too much. */
nbits_max = BITMAP_MAXBITS > 512 ? 512 : BITMAP_MAXBITS;
for (nbits = 1; nbits <= nbits_max; nbits++) {
bitmap_info_t binfo;
bitmap_info_init(&binfo, nbits);
test_bitmap_xfu_body(&binfo, nbits);
}
#define NB(nbits) { \
bitmap_info_t binfo = BITMAP_INFO_INITIALIZER(nbits); \
test_bitmap_xfu_body(&binfo, nbits); \
}
NBITS_TAB
#undef NB
}
TEST_END
int
main(void) {
return test(
test_bitmap_initializer,
test_bitmap_size,
test_bitmap_init,
test_bitmap_set,
test_bitmap_unset,
test_bitmap_xfu);
}
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