dso-test-data.c

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#include "util.h"

#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>

#include "symbol.h"

#define TEST_ASSERT_VAL(text, cond) \
do { \
    if (!(cond)) { \
        pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
        return -1; \
    } \
} while (0)

static char *test_file(int size)
{
    static char buf_templ[] = "/tmp/test-XXXXXX";
    char *templ = buf_templ;
    int fd, i;
    unsigned char *buf;

    fd = mkstemp(templ);

    buf = malloc(size);
    if (!buf) {
        close(fd);
        return NULL;
    }

    for (i = 0; i < size; i++)
        buf[i] = (unsigned char) ((int) i % 10);

    if (size != write(fd, buf, size))
        templ = NULL;

    close(fd);
    return templ;
}

#define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)

struct test_data_offset {
    off_t offset;
    u8 data[10];
    int size;
};

struct test_data_offset offsets[] = {
    /* Fill first cache page. */
    {
        .offset = 10,
        .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
        .size   = 10,
    },
    /* Read first cache page. */
    {
        .offset = 10,
        .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
        .size   = 10,
    },
    /* Fill cache boundary pages. */
    {
        .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
        .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
        .size   = 10,
    },
    /* Read cache boundary pages. */
    {
        .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
        .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
        .size   = 10,
    },
    /* Fill final cache page. */
    {
        .offset = TEST_FILE_SIZE - 10,
        .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
        .size   = 10,
    },
    /* Read final cache page. */
    {
        .offset = TEST_FILE_SIZE - 10,
        .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
        .size   = 10,
    },
    /* Read final cache page. */
    {
        .offset = TEST_FILE_SIZE - 3,
        .data   = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
        .size   = 3,
    },
};

int dso__test_data(void)
{
    struct machine machine;
    struct dso *dso;
    char *file = test_file(TEST_FILE_SIZE);
    size_t i;

    TEST_ASSERT_VAL("No test file", file);

    memset(&machine, 0, sizeof(machine));

    dso = dso__new((const char *)file);

    /* Basic 10 bytes tests. */
    for (i = 0; i < ARRAY_SIZE(offsets); i++) {
        struct test_data_offset *data = &offsets[i];
        ssize_t size;
        u8 buf[10];

        memset(buf, 0, 10);
        size = dso__data_read_offset(dso, &machine, data->offset,
                     buf, 10);

        TEST_ASSERT_VAL("Wrong size", size == data->size);
        TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
    }

    /* Read cross multiple cache pages. */
    {
        ssize_t size;
        int c;
        u8 *buf;

        buf = malloc(TEST_FILE_SIZE);
        TEST_ASSERT_VAL("ENOMEM\n", buf);

        /* First iteration to fill caches, second one to read them. */
        for (c = 0; c < 2; c++) {
            memset(buf, 0, TEST_FILE_SIZE);
            size = dso__data_read_offset(dso, &machine, 10,
                             buf, TEST_FILE_SIZE);

            TEST_ASSERT_VAL("Wrong size",
                size == (TEST_FILE_SIZE - 10));

            for (i = 0; i < (size_t)size; i++)
                TEST_ASSERT_VAL("Wrong data",
                    buf[i] == (i % 10));
        }

        free(buf);
    }

    dso__delete(dso);
    unlink(file);
    return 0;
}