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process_memory_maps_dump_provider_unittest.cc
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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/trace_event/process_memory_maps_dump_provider.h"
#include "base/files/file_util.h"
#include "base/trace_event/process_memory_dump.h"
#include "base/trace_event/process_memory_maps.h"
#include "base/trace_event/trace_event_argument.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace trace_event {
namespace {
const char kTestSmaps1[] =
"00400000-004be000 r-xp 00000000 fc:01 1234 /file/1\n"
"Size: 760 kB\n"
"Rss: 296 kB\n"
"Pss: 162 kB\n"
"Shared_Clean: 228 kB\n"
"Shared_Dirty: 0 kB\n"
"Private_Clean: 0 kB\n"
"Private_Dirty: 68 kB\n"
"Referenced: 296 kB\n"
"Anonymous: 68 kB\n"
"AnonHugePages: 0 kB\n"
"Swap: 4 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
"Locked: 0 kB\n"
"VmFlags: rd ex mr mw me dw sd\n"
"ff000000-ff800000 -w-p 00001080 fc:01 0 /file/name with space\n"
"Size: 0 kB\n"
"Rss: 192 kB\n"
"Pss: 128 kB\n"
"Shared_Clean: 120 kB\n"
"Shared_Dirty: 4 kB\n"
"Private_Clean: 60 kB\n"
"Private_Dirty: 8 kB\n"
"Referenced: 296 kB\n"
"Anonymous: 0 kB\n"
"AnonHugePages: 0 kB\n"
"Swap: 0 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
"Locked: 0 kB\n"
"VmFlags: rd ex mr mw me dw sd";
const char kTestSmaps2[] =
// An invalid region, with zero size and overlapping with the last one
// (See crbug.com/461237).
"7fe7ce79c000-7fe7ce79c000 ---p 00000000 00:00 0 \n"
"Size: 4 kB\n"
"Rss: 0 kB\n"
"Pss: 0 kB\n"
"Shared_Clean: 0 kB\n"
"Shared_Dirty: 0 kB\n"
"Private_Clean: 0 kB\n"
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
"AnonHugePages: 0 kB\n"
"Swap: 0 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
"Locked: 0 kB\n"
"VmFlags: rd ex mr mw me dw sd\n"
// A invalid region with its range going backwards.
"00400000-00200000 ---p 00000000 00:00 0 \n"
"Size: 4 kB\n"
"Rss: 0 kB\n"
"Pss: 0 kB\n"
"Shared_Clean: 0 kB\n"
"Shared_Dirty: 0 kB\n"
"Private_Clean: 0 kB\n"
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
"AnonHugePages: 0 kB\n"
"Swap: 0 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
"Locked: 0 kB\n"
"VmFlags: rd ex mr mw me dw sd\n"
// A good anonymous region at the end.
"7fe7ce79c000-7fe7ce7a8000 ---p 00000000 00:00 0 \n"
"Size: 48 kB\n"
"Rss: 40 kB\n"
"Pss: 32 kB\n"
"Shared_Clean: 16 kB\n"
"Shared_Dirty: 12 kB\n"
"Private_Clean: 8 kB\n"
"Private_Dirty: 4 kB\n"
"Referenced: 40 kB\n"
"Anonymous: 16 kB\n"
"AnonHugePages: 0 kB\n"
"Swap: 0 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
"Locked: 0 kB\n"
"VmFlags: rd wr mr mw me ac sd\n";
void CreateAndSetSmapsFileForTesting(const char* smaps_string,
ScopedFILE& file) {
FilePath temp_path;
FILE* temp_file = CreateAndOpenTemporaryFile(&temp_path);
file.reset(temp_file);
ASSERT_TRUE(temp_file);
ASSERT_TRUE(base::WriteFileDescriptor(fileno(temp_file), smaps_string,
strlen(smaps_string)));
}
} // namespace
TEST(ProcessMemoryMapsDumpProviderTest, ParseProcSmaps) {
const uint32 kProtR = ProcessMemoryMaps::VMRegion::kProtectionFlagsRead;
const uint32 kProtW = ProcessMemoryMaps::VMRegion::kProtectionFlagsWrite;
const uint32 kProtX = ProcessMemoryMaps::VMRegion::kProtectionFlagsExec;
const MemoryDumpArgs dump_args = {MemoryDumpLevelOfDetail::DETAILED};
auto pmmdp = ProcessMemoryMapsDumpProvider::GetInstance();
// Emulate an empty /proc/self/smaps.
ProcessMemoryDump pmd_invalid(nullptr /* session_state */);
ScopedFILE empty_file(OpenFile(FilePath("/dev/null"), "r"));
ASSERT_TRUE(empty_file.get());
ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = empty_file.get();
pmmdp->OnMemoryDump(dump_args, &pmd_invalid);
ASSERT_FALSE(pmd_invalid.has_process_mmaps());
// Parse the 1st smaps file.
ProcessMemoryDump pmd_1(nullptr /* session_state */);
ScopedFILE temp_file1;
CreateAndSetSmapsFileForTesting(kTestSmaps1, temp_file1);
ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = temp_file1.get();
pmmdp->OnMemoryDump(dump_args, &pmd_1);
ASSERT_TRUE(pmd_1.has_process_mmaps());
const auto& regions_1 = pmd_1.process_mmaps()->vm_regions();
ASSERT_EQ(2UL, regions_1.size());
EXPECT_EQ(0x00400000UL, regions_1[0].start_address);
EXPECT_EQ(0x004be000UL - 0x00400000UL, regions_1[0].size_in_bytes);
EXPECT_EQ(kProtR | kProtX, regions_1[0].protection_flags);
EXPECT_EQ("/file/1", regions_1[0].mapped_file);
EXPECT_EQ(162 * 1024UL, regions_1[0].byte_stats_proportional_resident);
EXPECT_EQ(228 * 1024UL, regions_1[0].byte_stats_shared_clean_resident);
EXPECT_EQ(0UL, regions_1[0].byte_stats_shared_dirty_resident);
EXPECT_EQ(0UL, regions_1[0].byte_stats_private_clean_resident);
EXPECT_EQ(68 * 1024UL, regions_1[0].byte_stats_private_dirty_resident);
EXPECT_EQ(4 * 1024UL, regions_1[0].byte_stats_swapped);
EXPECT_EQ(0xff000000UL, regions_1[1].start_address);
EXPECT_EQ(0xff800000UL - 0xff000000UL, regions_1[1].size_in_bytes);
EXPECT_EQ(kProtW, regions_1[1].protection_flags);
EXPECT_EQ("/file/name with space", regions_1[1].mapped_file);
EXPECT_EQ(128 * 1024UL, regions_1[1].byte_stats_proportional_resident);
EXPECT_EQ(120 * 1024UL, regions_1[1].byte_stats_shared_clean_resident);
EXPECT_EQ(4 * 1024UL, regions_1[1].byte_stats_shared_dirty_resident);
EXPECT_EQ(60 * 1024UL, regions_1[1].byte_stats_private_clean_resident);
EXPECT_EQ(8 * 1024UL, regions_1[1].byte_stats_private_dirty_resident);
EXPECT_EQ(0 * 1024UL, regions_1[1].byte_stats_swapped);
// Parse the 2nd smaps file.
ProcessMemoryDump pmd_2(nullptr /* session_state */);
ScopedFILE temp_file2;
CreateAndSetSmapsFileForTesting(kTestSmaps2, temp_file2);
ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = temp_file2.get();
pmmdp->OnMemoryDump(dump_args, &pmd_2);
ASSERT_TRUE(pmd_2.has_process_mmaps());
const auto& regions_2 = pmd_2.process_mmaps()->vm_regions();
ASSERT_EQ(1UL, regions_2.size());
EXPECT_EQ(0x7fe7ce79c000UL, regions_2[0].start_address);
EXPECT_EQ(0x7fe7ce7a8000UL - 0x7fe7ce79c000UL, regions_2[0].size_in_bytes);
EXPECT_EQ(0U, regions_2[0].protection_flags);
EXPECT_EQ("", regions_2[0].mapped_file);
EXPECT_EQ(32 * 1024UL, regions_2[0].byte_stats_proportional_resident);
EXPECT_EQ(16 * 1024UL, regions_2[0].byte_stats_shared_clean_resident);
EXPECT_EQ(12 * 1024UL, regions_2[0].byte_stats_shared_dirty_resident);
EXPECT_EQ(8 * 1024UL, regions_2[0].byte_stats_private_clean_resident);
EXPECT_EQ(4 * 1024UL, regions_2[0].byte_stats_private_dirty_resident);
EXPECT_EQ(0 * 1024UL, regions_2[0].byte_stats_swapped);
}
} // namespace trace_event
} // namespace base