src/lib/test-mempool-alloconly.c

	test-mempool-alloconly.c revision c8d80ba718487eff6b69b1adcf576b5265d2cf82
/* Copyright (c) 2007-2017 Dovecot authors, see the included COPYING file */

#include "test-lib.h"

static bool mem_has_bytes(const void *mem, size_t size, uint8_t b)
{
    const uint8_t *bytes = mem;
    unsigned int i;

    for (i = 0; i < size; i++) {
        if (bytes[i] != b)
            return FALSE;
    }
    return TRUE;
}

void test_mempool_alloconly(void)
{
#define SENTRY_SIZE 32
#define SENTRY_CHAR 0xDE
#define PMALLOC_MAX_COUNT 128
    pool_t pool;
    unsigned int i, j, k;
    void *mem[PMALLOC_MAX_COUNT + 1];
    char *sentry;

    test_begin("mempool_alloconly");
    for (i = 0; i < 64; i++) {
        for (j = 1; j <= 128; j++) {
            pool = pool_alloconly_create(MEMPOOL_GROWING"test", i);
            /* make sure p_malloc() doesn't overwrite unallocated
               data in data stack. parts of the code relies on
               this. */
            sentry = t_buffer_get(SENTRY_SIZE);
            memset(sentry, SENTRY_CHAR, SENTRY_SIZE);

            mem[0] = p_malloc(pool, j);
            memset(mem[0], j, j);

            for (k = 1; k <= PMALLOC_MAX_COUNT; k++) {
                mem[k] = p_malloc(pool, k);
                memset(mem[k], k, k);
            }
            test_assert(mem_has_bytes(sentry, SENTRY_SIZE, SENTRY_CHAR));
            test_assert(t_buffer_get(SENTRY_SIZE) == sentry);

            test_assert(mem_has_bytes(mem[0], j, j));
            for (k = 1; k <= PMALLOC_MAX_COUNT; k++)
                test_assert(mem_has_bytes(mem[k], k, k));
            pool_unref(&pool);
        }
    }
    test_end();
}

enum fatal_test_state fatal_mempool_alloconly(unsigned int stage)
{
    static pool_t pool;

    if (pool == NULL && stage != 0)
        return FATAL_TEST_FAILURE;

    switch(stage) {
    case 0: /* forbidden size */
        test_begin("fatal_mempool_alloconly");
        pool = pool_alloconly_create(MEMPOOL_GROWING"fatal", 1);
        test_expect_fatal_string("Trying to allocate 0 bytes");
        (void)p_malloc(pool, 0);
        return FATAL_TEST_FAILURE;

    case 1: /* logically impossible size */
        test_expect_fatal_string("Trying to allocate");
        (void)p_malloc(pool, SSIZE_T_MAX + 1ULL);
        return FATAL_TEST_FAILURE;

#if SSIZE_T_MAX > 2147483648 /* malloc(SSIZE_T_MAX) may succeed with 32bit */
    case 2: /* physically impossible size */
        test_expect_fatal_string("Out of memory");
        (void)p_malloc(pool, SSIZE_T_MAX - 1024);
        return FATAL_TEST_FAILURE;
#endif

    /* Continue with other tests as follows:
    case 3:
        something_fatal();
        return FATAL_TEST_FAILURE;
    */
    }

    /* Either our tests have finished, or the test suite has got confused. */
    pool_unref(&pool);
    test_end();
    return FATAL_TEST_FINISHED;
}