base/trace_event/process_memory_totals_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_totals_dump_provider.h"
   6
   7 #include "base/trace_event/process_memory_dump.h"
   8 #include "base/trace_event/process_memory_totals.h"
   9 #include "testing/gtest/include/gtest/gtest.h"
  10
  11 namespace base {
  12 namespace trace_event {
  13
  14 TEST(ProcessMemoryTotalsDumpProviderTest, DumpRSS) {
  15   const MemoryDumpArgs high_detail_args = {MemoryDumpLevelOfDetail::DETAILED};
  16   auto pmtdp = ProcessMemoryTotalsDumpProvider::GetInstance();
  17   scoped_ptr<ProcessMemoryDump> pmd_before(new ProcessMemoryDump(nullptr));
  18   scoped_ptr<ProcessMemoryDump> pmd_after(new ProcessMemoryDump(nullptr));
  19
  20   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 1024;
  21   pmtdp->OnMemoryDump(high_detail_args, pmd_before.get());
  22
  23   // Pretend that the RSS of the process increased of +1M.
  24   const size_t kAllocSize = 1048576;
  25   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing += kAllocSize;
  26
  27   pmtdp->OnMemoryDump(high_detail_args, pmd_after.get());
  28
  29   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 0;
  30
  31   ASSERT_TRUE(pmd_before->has_process_totals());
  32   ASSERT_TRUE(pmd_after->has_process_totals());
  33
  34   const uint64 rss_before = pmd_before->process_totals()->resident_set_bytes();
  35   const uint64 rss_after = pmd_after->process_totals()->resident_set_bytes();
  36
  37   EXPECT_NE(0U, rss_before);
  38   EXPECT_NE(0U, rss_after);
  39
  40   EXPECT_EQ(rss_after - rss_before, kAllocSize);
  41 }
  42
  43 }  // namespace trace_event
  44 }  // namespace base