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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <sys/time.h>
     18 
     19 #include <chrono>
     20 #include <functional>
     21 
     22 #include <gtest/gtest.h>
     23 #include <ScopedDisableMalloc.h>
     24 
     25 using namespace std::chrono_literals;
     26 
     27 class DisableMallocTest : public ::testing::Test {
     28  protected:
     29   void alarm(std::chrono::microseconds us) {
     30     std::chrono::seconds s = std::chrono::duration_cast<std::chrono::seconds>(us);
     31     itimerval t = itimerval();
     32     t.it_value.tv_sec = s.count();
     33     t.it_value.tv_usec = (us - s).count();
     34     setitimer(ITIMER_REAL, &t, NULL);
     35   }
     36 };
     37 
     38 TEST_F(DisableMallocTest, reenable) {
     39   ASSERT_EXIT({
     40     alarm(100ms);
     41     void *ptr1 = malloc(128);
     42     ASSERT_NE(ptr1, nullptr);
     43     free(ptr1);
     44     {
     45       ScopedDisableMalloc disable_malloc;
     46     }
     47     void *ptr2 = malloc(128);
     48     ASSERT_NE(ptr2, nullptr);
     49     free(ptr2);
     50     _exit(1);
     51   }, ::testing::ExitedWithCode(1), "");
     52 }
     53 
     54 TEST_F(DisableMallocTest, deadlock_allocate) {
     55   ASSERT_DEATH({
     56     void *ptr = malloc(128);
     57     ASSERT_NE(ptr, nullptr);
     58     free(ptr);
     59     {
     60       alarm(100ms);
     61       ScopedDisableMalloc disable_malloc;
     62       void* ptr = malloc(128);
     63       ASSERT_NE(ptr, nullptr);
     64       free(ptr);
     65     }
     66   }, "");
     67 }
     68 
     69 TEST_F(DisableMallocTest, deadlock_new) {
     70   ASSERT_DEATH({
     71     char* ptr = new(char);
     72     ASSERT_NE(ptr, nullptr);
     73     delete(ptr);
     74     {
     75       alarm(100ms);
     76       ScopedDisableMalloc disable_malloc;
     77       char* ptr = new(char);
     78       ASSERT_NE(ptr, nullptr);
     79       delete(ptr);
     80     }
     81   }, "");
     82 }
     83 
     84 TEST_F(DisableMallocTest, deadlock_delete) {
     85   ASSERT_DEATH({
     86     char* ptr = new(char);
     87     ASSERT_NE(ptr, nullptr);
     88     {
     89       alarm(250ms);
     90       ScopedDisableMalloc disable_malloc;
     91       delete(ptr);
     92     }
     93   }, "");
     94 }
     95 
     96 TEST_F(DisableMallocTest, deadlock_free) {
     97   ASSERT_DEATH({
     98     void *ptr = malloc(128);
     99     ASSERT_NE(ptr, nullptr);
    100     {
    101       alarm(100ms);
    102       ScopedDisableMalloc disable_malloc;
    103       free(ptr);
    104     }
    105   }, "");
    106 }
    107 
    108 TEST_F(DisableMallocTest, deadlock_fork) {
    109   ASSERT_DEATH({
    110     {
    111       alarm(100ms);
    112       ScopedDisableMalloc disable_malloc;
    113       fork();
    114     }
    115   }, "");
    116 }
    117