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      1 /*
      2  * Copyright (C) 2014 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/resource.h>
     18 
     19 #include <gtest/gtest.h>
     20 
     21 TEST(sys_resource, rlimit_struct_size) {
     22 #if defined(__LP64__) || defined(__GLIBC__)
     23   ASSERT_EQ(sizeof(rlimit), sizeof(rlimit64));
     24   ASSERT_EQ(8U, sizeof(rlim_t));
     25 #else
     26   ASSERT_NE(sizeof(rlimit), sizeof(rlimit64));
     27   ASSERT_EQ(4U, sizeof(rlim_t));
     28 #endif
     29 }
     30 
     31 class SysResourceTest : public ::testing::Test {
     32  protected:
     33   virtual void SetUp() {
     34     ASSERT_EQ(0, getrlimit(RLIMIT_CORE, &l32_));
     35     ASSERT_EQ(0, getrlimit64(RLIMIT_CORE, &l64_));
     36     ASSERT_EQ(0, prlimit(0, RLIMIT_CORE, nullptr, &pr_l32_));
     37     ASSERT_EQ(0, prlimit64(0, RLIMIT_CORE, nullptr, &pr_l64_));
     38   }
     39 
     40   void CheckResourceLimits();
     41 
     42  protected:
     43   rlimit l32_;
     44   rlimit64 l64_;
     45   rlimit pr_l32_;
     46   rlimit64 pr_l64_;
     47 };
     48 
     49 void SysResourceTest::CheckResourceLimits() {
     50   ASSERT_EQ(0, getrlimit(RLIMIT_CORE, &l32_));
     51   ASSERT_EQ(0, getrlimit64(RLIMIT_CORE, &l64_));
     52   ASSERT_EQ(0, prlimit(0, RLIMIT_CORE, nullptr, &pr_l32_));
     53   ASSERT_EQ(0, prlimit64(0, RLIMIT_CORE, nullptr, &pr_l64_));
     54 
     55   ASSERT_EQ(l32_.rlim_cur, pr_l32_.rlim_cur);
     56   ASSERT_EQ(l64_.rlim_cur, pr_l64_.rlim_cur);
     57 
     58   if (l64_.rlim_cur == RLIM64_INFINITY) {
     59     ASSERT_EQ(RLIM_INFINITY, l32_.rlim_cur);
     60   } else {
     61     ASSERT_EQ(l64_.rlim_cur, l32_.rlim_cur);
     62   }
     63 
     64   ASSERT_EQ(l32_.rlim_max, pr_l32_.rlim_max);
     65   ASSERT_EQ(l64_.rlim_max, pr_l64_.rlim_max);
     66 
     67   if (l64_.rlim_max == RLIM64_INFINITY) {
     68     ASSERT_EQ(RLIM_INFINITY, l32_.rlim_max);
     69   } else {
     70     ASSERT_EQ(l64_.rlim_max, l32_.rlim_max);
     71   }
     72 }
     73 
     74 // Force rlim_max to be bigger than a constant so we can continue following test.
     75 // Change resource limit setting with "ulimit -Hc" in the shell if this test fails.
     76 TEST_F(SysResourceTest, RLIMIT_CORE_rlim_max_not_zero) {
     77   ASSERT_TRUE(l32_.rlim_max == RLIM_INFINITY || l32_.rlim_max >= 456U) <<
     78     "RLIMIT_CORE rlim_max = " << l32_.rlim_max;
     79 }
     80 
     81 TEST_F(SysResourceTest, get_resource_limit_equal) {
     82   CheckResourceLimits();
     83 }
     84 
     85 TEST_F(SysResourceTest, setrlimit) {
     86   l32_.rlim_cur = 123U;
     87   ASSERT_EQ(0, setrlimit(RLIMIT_CORE, &l32_));
     88   CheckResourceLimits();
     89   ASSERT_EQ(123U, l32_.rlim_cur);
     90 }
     91 
     92 TEST_F(SysResourceTest, setrlimit64) {
     93   l64_.rlim_cur = 456U;
     94   ASSERT_EQ(0, setrlimit64(RLIMIT_CORE, &l64_));
     95   CheckResourceLimits();
     96   ASSERT_EQ(456U, l64_.rlim_cur);
     97 }
     98 
     99 TEST_F(SysResourceTest, prlimit) {
    100   pr_l32_.rlim_cur = pr_l32_.rlim_max;
    101   ASSERT_EQ(0, prlimit(0, RLIMIT_CORE, &pr_l32_, nullptr));
    102   CheckResourceLimits();
    103   ASSERT_EQ(pr_l32_.rlim_max, pr_l32_.rlim_cur);
    104 }
    105 
    106 TEST_F(SysResourceTest, prlimit64) {
    107   pr_l64_.rlim_cur = pr_l64_.rlim_max;
    108   ASSERT_EQ(0, prlimit64(0, RLIMIT_CORE, &pr_l64_, nullptr));
    109   CheckResourceLimits();
    110   ASSERT_EQ(pr_l64_.rlim_max, pr_l64_.rlim_cur);
    111 }
    112