ucx: tests/util_allocator.c@d3f451440eef (annotated)

tests/util_allocator.c@d3f451440eef (annotated)

tests/util_allocator.c

Wed, 27 Dec 2023 17:28:33 +0100

author: Mike Becker <universe@uap-core.de>
date: Wed, 27 Dec 2023 17:28:33 +0100
changeset 775: d3f451440eef
parent 770: ed710122af44
child 814: 5f9e07d3dd6c
permissions: -rw-r--r--

ignore the intentional use-after-free

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "util_allocator.h"
 #include "cx/test.h"
 static void cx_testing_allocator_track(CxTestingAllocator *alloc, void *ptr) {
     for (size_t i = 0; i < alloc->tracked_count; i++) {
         if (alloc->tracked[i] == ptr) return; // is already tracked
     }
     if (alloc->tracked_count == alloc->tracked_capacity) {
         size_t newcapa = alloc->tracked_capacity + 64;
         void *newarr = realloc(alloc->tracked, newcapa * sizeof(void *));
         if (newarr == NULL) abort();
         alloc->tracked = newarr;
         alloc->tracked_capacity = newcapa;
     }
     alloc->tracked[alloc->tracked_count] = ptr;
     alloc->tracked_count++;
 }
 static bool cx_testing_allocator_untrack(CxTestingAllocator *alloc, void *ptr) {
     for (size_t i = 0; i < alloc->tracked_count; i++) {
         if (alloc->tracked[i] == ptr) {
             size_t last = alloc->tracked_count - 1;
             if (i < last) {
                 alloc->tracked[i] = alloc->tracked[last];
             }
             alloc->tracked_count--;
             return true;
         }
     }
     return false;
 }
 static void *cx_malloc_testing(void *d, size_t n) {
     CxTestingAllocator *data = d;
     void *ptr = malloc(n);
     data->alloc_total++;
     if (ptr == NULL) {
         data->alloc_failed++;
     } else {
         cx_testing_allocator_track(data, ptr);
     }
     return ptr;
 }
 static void *cx_realloc_testing(void *d, void *mem, size_t n) {
     CxTestingAllocator *data = d;
     void *ptr = realloc(mem, n);
     if (ptr == mem) {
         return ptr;
     } else {
         data->alloc_total++;
         if (ptr == NULL) {
             data->alloc_failed++;
         } else {
             data->free_total++;
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wuse-after-free"
             if (!cx_testing_allocator_untrack(data, mem)) {
                 data->free_failed++;
             }
 #pragma GCC diagnostic pop
             cx_testing_allocator_track(data, ptr);
         }
         return ptr;
     }
 }
 static void *cx_calloc_testing(void *d, size_t nelem, size_t n) {
     CxTestingAllocator *data = d;
     void *ptr = calloc(nelem, n);
     data->alloc_total++;
     if (ptr == NULL) {
         data->alloc_failed++;
     } else {
         cx_testing_allocator_track(data, ptr);
     }
     return ptr;
 }
 static void cx_free_testing(void *d, void *mem) {
     CxTestingAllocator *data = d;
     data->free_total++;
     if (cx_testing_allocator_untrack(data, mem)) {
         free(mem);
     } else {
         data->free_failed++;
         // do not even attempt to free mem, because it is likely to segfault
     }
 }
 cx_allocator_class cx_testing_allocator_class = {
         cx_malloc_testing,
         cx_realloc_testing,
         cx_calloc_testing,
         cx_free_testing
 };
 void cx_testing_allocator_init(CxTestingAllocator *alloc) {
     alloc->base.cl = &cx_testing_allocator_class;
     alloc->base.data = alloc;
     alloc->alloc_failed = 0;
     alloc->alloc_total = 0;
     alloc->free_failed = 0;
     alloc->free_total = 0;
     size_t initial_capa = 16;
     alloc->tracked_capacity = initial_capa;
     alloc->tracked_count = 0;
     alloc->tracked = calloc(sizeof(void *), initial_capa);
 }
 void cx_testing_allocator_destroy(CxTestingAllocator *alloc) {
     free(alloc->tracked);
 }
 bool cx_testing_allocator_used(CxTestingAllocator const *alloc) {
     return alloc->alloc_total > 0;
 }
 bool cx_testing_allocator_verify(CxTestingAllocator const *alloc) {
     return alloc->tracked_count == 0 && alloc->alloc_failed == 0 && alloc->free_failed == 0
            && alloc->alloc_total == alloc->free_total;
 }
 // SELF-TEST
 CX_TEST(test_util_allocator_expect_free) {
     CxTestingAllocator talloc;
     cx_testing_allocator_init(&talloc);
     CxAllocator *alloc = &talloc.base;
     CX_TEST_DO {
         CX_TEST_ASSERTM(cx_testing_allocator_verify(&talloc),
                         "Fresh testing allocator fails to verify.");
         CX_TEST_ASSERTM(!cx_testing_allocator_used(&talloc),
                         "Fresh testing allocator already used.");
         void *ptr = cxMalloc(alloc, 16);
         CX_TEST_ASSERTM(!cx_testing_allocator_verify(&talloc),
                         "Testing allocator verifies with unfreed memory.");
         CX_TEST_ASSERT(cx_testing_allocator_used(&talloc));
         CX_TEST_ASSERT(ptr != NULL);
         cxFree(alloc, ptr);
         CX_TEST_ASSERTM(cx_testing_allocator_verify(&talloc),
                         "Testing allocator fails to verify after everything freed.");
     }
     cx_testing_allocator_destroy(&talloc);
 }
 CX_TEST(test_util_allocator_detect_double_free) {
     CxTestingAllocator talloc;
     cx_testing_allocator_init(&talloc);
     CxAllocator *alloc = &talloc.base;
     CX_TEST_DO {
         CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
         void *ptr = cxMalloc(alloc, 16);
         CX_TEST_ASSERT(ptr != NULL);
         cxFree(alloc, ptr);
         CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
         cxFree(alloc, ptr);
         CX_TEST_ASSERTM(!cx_testing_allocator_verify(&talloc),
                         "Testing allocator does not detect double-free.");
     }
     cx_testing_allocator_destroy(&talloc);
 }
 CX_TEST(test_util_allocator_free_untracked) {
     CxTestingAllocator talloc;
     cx_testing_allocator_init(&talloc);
     CxAllocator *alloc = &talloc.base;
     void *ptr = malloc(16);
     CX_TEST_DO {
         CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
         cxFree(alloc, ptr);
         CX_TEST_ASSERTM(!cx_testing_allocator_verify(&talloc),
                         "Testing allocator does not detect free of untracked memory.");
     }
     free(ptr);
     cx_testing_allocator_destroy(&talloc);
 }
 CX_TEST(test_util_allocator_full_lifecycle_with_realloc) {
     CxTestingAllocator talloc;
     cx_testing_allocator_init(&talloc);
     CxAllocator *alloc = &talloc.base;
     CX_TEST_DO {
         CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
         void *ptr = cxMalloc(alloc, 16);
         CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
         CX_TEST_ASSERT(ptr != NULL);
         CX_TEST_ASSERT(talloc.tracked_count == 1);
         ptr = cxRealloc(alloc, ptr, 256);
         CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
         CX_TEST_ASSERT(ptr != NULL);
         CX_TEST_ASSERT(talloc.tracked_count == 1);
         cxFree(alloc, ptr);
         CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
     }
     cx_testing_allocator_destroy(&talloc);
 }
 CX_TEST(test_util_allocator_calloc_initializes) {
     CxTestingAllocator talloc;
     cx_testing_allocator_init(&talloc);
     CxAllocator *alloc = &talloc.base;
     CX_TEST_DO {
         const char zeros[16] = {0};
         void *ptr = cxCalloc(alloc, 16, 1);
         CX_TEST_ASSERT(memcmp(ptr, zeros, 16) == 0);
         cxFree(alloc, ptr);
         CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
     }
     cx_testing_allocator_destroy(&talloc);
 }
 CxTestSuite *cx_test_suite_testing_allocator(void) {
     CxTestSuite *suite = cx_test_suite_new("testing allocator self-test");
     cx_test_register(suite, test_util_allocator_expect_free);
     cx_test_register(suite, test_util_allocator_detect_double_free);
     cx_test_register(suite, test_util_allocator_free_untracked);
     cx_test_register(suite, test_util_allocator_full_lifecycle_with_realloc);
     cx_test_register(suite, test_util_allocator_calloc_initializes);
     return suite;
 }

Mercurial > hg > ucx / annotate

tests/util_allocator.c@d3f451440eef (annotated)

tests/util_allocator.c