base/trace_event/process_memory_maps_dump_provider_unittest.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/trace_event/process_memory_maps_dump_provider.h"
   6
   7 #include <fstream>
   8 #include <sstream>
   9
  10 #include "base/trace_event/process_memory_dump.h"
  11 #include "base/trace_event/process_memory_maps.h"
  12 #include "base/trace_event/trace_event_argument.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace base {
  16 namespace trace_event {
  17
  18 #if defined(OS_LINUX) || defined(OS_ANDROID)
  19 namespace {
  20 const char kTestSmaps1[] =
  21     "00400000-004be000 r-xp 00000000 fc:01 1234              /file/1\n"
  22     "Size:                760 kB\n"
  23     "Rss:                 296 kB\n"
  24     "Pss:                 162 kB\n"
  25     "Shared_Clean:        228 kB\n"
  26     "Shared_Dirty:          0 kB\n"
  27     "Private_Clean:         0 kB\n"
  28     "Private_Dirty:        68 kB\n"
  29     "Referenced:          296 kB\n"
  30     "Anonymous:            68 kB\n"
  31     "AnonHugePages:         0 kB\n"
  32     "Swap:                  0 kB\n"
  33     "KernelPageSize:        4 kB\n"
  34     "MMUPageSize:           4 kB\n"
  35     "Locked:                0 kB\n"
  36     "VmFlags: rd ex mr mw me dw sd\n"
  37     "ff000000-ff800000 -w-p 00001080 fc:01 0            /file/name with space\n"
  38     "Size:                  0 kB\n"
  39     "Rss:                 128 kB\n"
  40     "Pss:                 128 kB\n"
  41     "Shared_Clean:        124 kB\n"
  42     "Shared_Dirty:          0 kB\n"
  43     "Private_Clean:        68 kB\n"
  44     "Private_Dirty:         0 kB\n"
  45     "Referenced:          296 kB\n"
  46     "Anonymous:             0 kB\n"
  47     "AnonHugePages:         0 kB\n"
  48     "Swap:                  0 kB\n"
  49     "KernelPageSize:        4 kB\n"
  50     "MMUPageSize:           4 kB\n"
  51     "Locked:                0 kB\n"
  52     "VmFlags: rd ex mr mw me dw sd";
  53
  54 const char kTestSmaps2[] =
  55     // An invalid region, with zero size and overlapping with the last one
  56     // (See crbug.com/461237).
  57     "7fe7ce79c000-7fe7ce79c000 ---p 00000000 00:00 0 \n"
  58     "Size:                  4 kB\n"
  59     "Rss:                   0 kB\n"
  60     "Pss:                   0 kB\n"
  61     "Shared_Clean:          0 kB\n"
  62     "Shared_Dirty:          0 kB\n"
  63     "Private_Clean:         0 kB\n"
  64     "Private_Dirty:         0 kB\n"
  65     "Referenced:            0 kB\n"
  66     "Anonymous:             0 kB\n"
  67     "AnonHugePages:         0 kB\n"
  68     "Swap:                  0 kB\n"
  69     "KernelPageSize:        4 kB\n"
  70     "MMUPageSize:           4 kB\n"
  71     "Locked:                0 kB\n"
  72     "VmFlags: rd ex mr mw me dw sd\n"
  73     // A invalid region with its range going backwards.
  74     "00400000-00200000 ---p 00000000 00:00 0 \n"
  75     "Size:                  4 kB\n"
  76     "Rss:                   0 kB\n"
  77     "Pss:                   0 kB\n"
  78     "Shared_Clean:          0 kB\n"
  79     "Shared_Dirty:          0 kB\n"
  80     "Private_Clean:         0 kB\n"
  81     "Private_Dirty:         0 kB\n"
  82     "Referenced:            0 kB\n"
  83     "Anonymous:             0 kB\n"
  84     "AnonHugePages:         0 kB\n"
  85     "Swap:                  0 kB\n"
  86     "KernelPageSize:        4 kB\n"
  87     "MMUPageSize:           4 kB\n"
  88     "Locked:                0 kB\n"
  89     "VmFlags: rd ex mr mw me dw sd\n"
  90     // A good anonymous region at the end.
  91     "7fe7ce79c000-7fe7ce7a8000 ---p 00000000 00:00 0 \n"
  92     "Size:                 48 kB\n"
  93     "Rss:                  40 kB\n"
  94     "Pss:                   0 kB\n"
  95     "Shared_Clean:         16 kB\n"
  96     "Shared_Dirty:         12 kB\n"
  97     "Private_Clean:         8 kB\n"
  98     "Private_Dirty:         4 kB\n"
  99     "Referenced:           40 kB\n"
 100     "Anonymous:            16 kB\n"
 101     "AnonHugePages:         0 kB\n"
 102     "Swap:                  0 kB\n"
 103     "KernelPageSize:        4 kB\n"
 104     "MMUPageSize:           4 kB\n"
 105     "Locked:                0 kB\n"
 106     "VmFlags: rd wr mr mw me ac sd\n";
 107 }  // namespace
 108
 109 TEST(ProcessMemoryMapsDumpProviderTest, ParseProcSmaps) {
 110   const uint32 kProtR = ProcessMemoryMaps::VMRegion::kProtectionFlagsRead;
 111   const uint32 kProtW = ProcessMemoryMaps::VMRegion::kProtectionFlagsWrite;
 112   const uint32 kProtX = ProcessMemoryMaps::VMRegion::kProtectionFlagsExec;
 113
 114   auto pmmdp = ProcessMemoryMapsDumpProvider::GetInstance();
 115
 116   // Emulate a non-existent /proc/self/smaps.
 117   ProcessMemoryDump pmd_invalid;
 118   std::ifstream non_existent_file("/tmp/does-not-exist");
 119   ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = &non_existent_file;
 120   CHECK_EQ(false, non_existent_file.good());
 121   pmmdp->DumpInto(&pmd_invalid);
 122   ASSERT_FALSE(pmd_invalid.has_process_mmaps());
 123
 124   // Emulate an empty /proc/self/smaps.
 125   std::ifstream empty_file("/dev/null");
 126   ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = &empty_file;
 127   CHECK_EQ(true, empty_file.good());
 128   pmmdp->DumpInto(&pmd_invalid);
 129   ASSERT_FALSE(pmd_invalid.has_process_mmaps());
 130
 131   // Parse the 1st smaps file.
 132   ProcessMemoryDump pmd_1;
 133   std::istringstream test_smaps_1(kTestSmaps1);
 134   ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = &test_smaps_1;
 135   pmmdp->DumpInto(&pmd_1);
 136   ASSERT_TRUE(pmd_1.has_process_mmaps());
 137   const auto& regions_1 = pmd_1.process_mmaps()->vm_regions();
 138   ASSERT_EQ(2UL, regions_1.size());
 139
 140   EXPECT_EQ(0x00400000UL, regions_1[0].start_address);
 141   EXPECT_EQ(0x004be000UL - 0x00400000UL, regions_1[0].size_in_bytes);
 142   EXPECT_EQ(kProtR | kProtX, regions_1[0].protection_flags);
 143   EXPECT_EQ("/file/1", regions_1[0].mapped_file);
 144   EXPECT_EQ(0UL, regions_1[0].mapped_file_offset);
 145   EXPECT_EQ(296 * 1024UL, regions_1[0].byte_stats_resident);
 146   EXPECT_EQ(68 * 1024UL, regions_1[0].byte_stats_anonymous);
 147
 148   EXPECT_EQ(0xff000000UL, regions_1[1].start_address);
 149   EXPECT_EQ(0xff800000UL - 0xff000000UL, regions_1[1].size_in_bytes);
 150   EXPECT_EQ(kProtW, regions_1[1].protection_flags);
 151   EXPECT_EQ("/file/name with space", regions_1[1].mapped_file);
 152   EXPECT_EQ(0x00001080UL, regions_1[1].mapped_file_offset);
 153   EXPECT_EQ(128 * 1024UL, regions_1[1].byte_stats_resident);
 154   EXPECT_EQ(0UL, regions_1[1].byte_stats_anonymous);
 155
 156   // Parse the 2nd smaps file.
 157   ProcessMemoryDump pmd_2;
 158   std::istringstream test_smaps_2(kTestSmaps2);
 159   ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = &test_smaps_2;
 160   pmmdp->DumpInto(&pmd_2);
 161   ASSERT_TRUE(pmd_2.has_process_mmaps());
 162   const auto& regions_2 = pmd_2.process_mmaps()->vm_regions();
 163   ASSERT_EQ(1UL, regions_2.size());
 164   EXPECT_EQ(0x7fe7ce79c000UL, regions_2[0].start_address);
 165   EXPECT_EQ(0x7fe7ce7a8000UL - 0x7fe7ce79c000UL, regions_2[0].size_in_bytes);
 166   EXPECT_EQ(0U, regions_2[0].protection_flags);
 167   EXPECT_EQ("", regions_2[0].mapped_file);
 168   EXPECT_EQ(0UL, regions_2[0].mapped_file_offset);
 169   EXPECT_EQ(40 * 1024UL, regions_2[0].byte_stats_resident);
 170   EXPECT_EQ(16 * 1024UL, regions_2[0].byte_stats_anonymous);
 171 }
 172 #endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 173
 174 }  // namespace trace_event
 175 }  // namespace base