[tracing] Dump child processes' memory metrics in browser

components/tracing/process_metrics_memory_dump_provider_unittest.cc

 // 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 "components/tracing/process_metrics_memory_dump_provider.h"
 
 #include <stdint.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/process_memory_totals.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace base {
-namespace trace_event {
+namespace tracing {
 
+#if defined(OS_LINUX) || defined(OS_ANDROID)
 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"
@@ skipping 70 matching lines @@
     "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;
+                                     base::ScopedFILE& file) {
+  base::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
+#endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 
-TEST(ProcessMemoryMapsDumpProviderTest, ParseProcSmaps) {
-  const uint32_t kProtR = ProcessMemoryMaps::VMRegion::kProtectionFlagsRead;
-  const uint32_t kProtW = ProcessMemoryMaps::VMRegion::kProtectionFlagsWrite;
-  const uint32_t kProtX = ProcessMemoryMaps::VMRegion::kProtectionFlagsExec;
-  const MemoryDumpArgs dump_args = {MemoryDumpLevelOfDetail::DETAILED};
+TEST(ProcessMetricsMemoryDumpProviderTest, DumpRSS) {
+  const base::trace_event::MemoryDumpArgs high_detail_args = {
+      base::trace_event::MemoryDumpLevelOfDetail::DETAILED};
+  scoped_ptr<ProcessMetricsMemoryDumpProvider> pmtdp(
+      new ProcessMetricsMemoryDumpProvider(base::kNullProcessId));
+  scoped_ptr<base::trace_event::ProcessMemoryDump> pmd_before(
+      new base::trace_event::ProcessMemoryDump(nullptr));
+  scoped_ptr<base::trace_event::ProcessMemoryDump> pmd_after(
+      new base::trace_event::ProcessMemoryDump(nullptr));
 
-  auto pmmdp = ProcessMemoryMapsDumpProvider::GetInstance();
+  ProcessMetricsMemoryDumpProvider::rss_bytes_for_testing = 1024;
+  pmtdp->OnMemoryDump(high_detail_args, pmd_before.get());
+
+  // Pretend that the RSS of the process increased of +1M.
+  const size_t kAllocSize = 1048576;
+  ProcessMetricsMemoryDumpProvider::rss_bytes_for_testing += kAllocSize;
+
+  pmtdp->OnMemoryDump(high_detail_args, pmd_after.get());
+
+  ProcessMetricsMemoryDumpProvider::rss_bytes_for_testing = 0;
+
+  ASSERT_TRUE(pmd_before->has_process_totals());
+  ASSERT_TRUE(pmd_after->has_process_totals());
+
+  const uint64_t rss_before =
+      pmd_before->process_totals()->resident_set_bytes();
+  const uint64_t rss_after = pmd_after->process_totals()->resident_set_bytes();
+
+  EXPECT_NE(0U, rss_before);
+  EXPECT_NE(0U, rss_after);
+
+  EXPECT_EQ(rss_after - rss_before, kAllocSize);
+}
+
+#if defined(OS_LINUX) || defined(OS_ANDROID)
+TEST(ProcessMetricsMemoryDumpProviderTest, ParseProcSmaps) {
+  const uint32_t kProtR =
+      base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsRead;
+  const uint32_t kProtW =
+      base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsWrite;
+  const uint32_t kProtX =
+      base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsExec;
+  const base::trace_event::MemoryDumpArgs dump_args = {
+      base::trace_event::MemoryDumpLevelOfDetail::DETAILED};
+
+  scoped_ptr<ProcessMetricsMemoryDumpProvider> pmmdp(
+      new ProcessMetricsMemoryDumpProvider(base::kNullProcessId));
 
   // Emulate an empty /proc/self/smaps.
-  ProcessMemoryDump pmd_invalid(nullptr /* session_state */);
-  ScopedFILE empty_file(OpenFile(FilePath("/dev/null"), "r"));
+  base::trace_event::ProcessMemoryDump pmd_invalid(nullptr /* session_state */);
+  base::ScopedFILE empty_file(OpenFile(base::FilePath("/dev/null"), "r"));
   ASSERT_TRUE(empty_file.get());
-  ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = empty_file.get();
+  ProcessMetricsMemoryDumpProvider::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;
+  base::trace_event::ProcessMemoryDump pmd_1(nullptr /* session_state */);
+  base::ScopedFILE temp_file1;
   CreateAndSetSmapsFileForTesting(kTestSmaps1, temp_file1);
-  ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = temp_file1.get();
+  ProcessMetricsMemoryDumpProvider::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;
+  base::trace_event::ProcessMemoryDump pmd_2(nullptr /* session_state */);
+  base::ScopedFILE temp_file2;
   CreateAndSetSmapsFileForTesting(kTestSmaps2, temp_file2);
-  ProcessMemoryMapsDumpProvider::proc_smaps_for_testing = temp_file2.get();
+  ProcessMetricsMemoryDumpProvider::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);
 }
+#endif  // defined(OS_LINUX) || defined(OS_ANDROID)
 
-}  // namespace trace_event
-}  // namespace base
+}  // namespace tracing