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   auto pmtdp = ProcessMemoryTotalsDumpProvider::GetInstance();
  16   scoped_ptr<ProcessMemoryDump> pmd_before(new ProcessMemoryDump(nullptr));
  17   scoped_ptr<ProcessMemoryDump> pmd_after(new ProcessMemoryDump(nullptr));
  18
  19   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 1024;
  20   pmtdp->OnMemoryDump(pmd_before.get());
  21
  22   // Pretend that the RSS of the process increased of +1M.
  23   const size_t kAllocSize = 1048576;
  24   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing += kAllocSize;
  25
  26   pmtdp->OnMemoryDump(pmd_after.get());
  27
  28   ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 0;
  29
  30   ASSERT_TRUE(pmd_before->has_process_totals());
  31   ASSERT_TRUE(pmd_after->has_process_totals());
  32
  33   const uint64 rss_before = pmd_before->process_totals()->resident_set_bytes();
  34   const uint64 rss_after = pmd_after->process_totals()->resident_set_bytes();
  35
  36   EXPECT_NE(0U, rss_before);
  37   EXPECT_NE(0U, rss_after);
  38
  39   EXPECT_EQ(rss_after - rss_before, kAllocSize);
  40 }
  41
  42 }  // namespace trace_event
  43 }  // namespace base