tracing: restructure to the components/tracing folder

components/tracing/graphics_memory_dump_provider_android.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 "components/tracing/graphics_memory_dump_provider_android.h"
-
-#include <fcntl.h>
-#include <stdint.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/un.h>
-
-#include "base/files/scoped_file.h"
-#include "base/macros.h"
-#include "base/posix/eintr_wrapper.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_piece.h"
-#include "base/strings/string_tokenizer.h"
-#include "base/trace_event/process_memory_dump.h"
-#include "base/trace_event/process_memory_totals.h"
-
-using base::trace_event::MemoryAllocatorDump;
-
-namespace tracing {
-
-// static
-const char GraphicsMemoryDumpProvider::kDumpBaseName[] =
-    "gpu/android_memtrack/";
-
-// static
-GraphicsMemoryDumpProvider* GraphicsMemoryDumpProvider::GetInstance() {
-  return base::Singleton<
-      GraphicsMemoryDumpProvider,
-      base::LeakySingletonTraits<GraphicsMemoryDumpProvider>>::get();
-}
-
-bool GraphicsMemoryDumpProvider::OnMemoryDump(
-    const base::trace_event::MemoryDumpArgs& args,
-    base::trace_event::ProcessMemoryDump* pmd) {
-  if (args.level_of_detail !=
-      base::trace_event::MemoryDumpLevelOfDetail::DETAILED)
-    return true;  // Dump on detailed memory dumps only.
-
-  const char kAbstractSocketName[] = "chrome_tracing_memtrack_helper";
-  struct sockaddr_un addr;
-
-  const int sock = socket(AF_UNIX, SOCK_SEQPACKET, 0);
-  if (sock == -1)
-    return false;
-  // Ensures that sock is always closed, even in case of early returns.
-  base::ScopedFD sock_closer(sock);
-
-  // Set recv() timeout to 250 ms.
-  struct timeval tv;
-  tv.tv_sec = 0;
-  tv.tv_usec = 250000;
-  setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
-
-  // Connect to the UNIX abstract (i.e. no physical filesystem link) socket.
-  memset(&addr, 0, sizeof(addr));
-  addr.sun_family = AF_UNIX;
-  strncpy(&addr.sun_path[1], kAbstractSocketName, sizeof(addr.sun_path) - 2);
-
-  if (connect(sock, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr))) {
-    LOG(WARNING) << "Could not connect to the memtrack_helper daemon. Please "
-                    "build memtrack_helper, adb push to the device and run it "
-                    "before starting the trace to get graphics memory data.";
-    return false;
-  }
-
-  // Check that the socket is owned by root (the memtrack_helper) process and
-  // not an (untrusted) user process.
-  struct ucred cred;
-  socklen_t cred_len = sizeof(cred);
-  if (getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &cred, &cred_len) < 0 ||
-      (static_cast<unsigned>(cred_len) < sizeof(cred)) ||
-      cred.uid != 0 /* root */) {
-    LOG(WARNING) << "Untrusted (!= root) memtrack_helper daemon detected.";
-    return false;
-  }
-
-  // Send the trace(PID) request.
-  char buf[4096];
-  const int buf_pid_len = snprintf(buf, sizeof(buf) - 1, "%d", getpid());
-  if (HANDLE_EINTR(send(sock, buf, buf_pid_len + 1, 0)) <= 0)
-    return false;
-
-  // The response consists of a few lines, each one with a key value pair. E.g.:
-  // graphics_total 10616832
-  // graphics_pss 10616832
-  // gl_total 17911808
-  // gl_pss 17911808
-  ssize_t rsize;
-  if ((rsize = HANDLE_EINTR(recv(sock, buf, sizeof(buf), 0))) <= 0)
-    return false;
-
-  buf[sizeof(buf) - 1] = '\0';
-  ParseResponseAndAddToDump(buf, static_cast<size_t>(rsize), pmd);
-  return true;
-}
-
-void GraphicsMemoryDumpProvider::ParseResponseAndAddToDump(
-    const char* response,
-    size_t length,
-    base::trace_event::ProcessMemoryDump* pmd) {
-  base::CStringTokenizer tokenizer(response, response + length, " \n");
-  while (true) {
-    if (!tokenizer.GetNext())
-      break;
-    base::StringPiece row_name = tokenizer.token_piece();
-    if (!tokenizer.GetNext())
-      break;
-    base::StringPiece value_str = tokenizer.token_piece();
-    int64_t value;
-    if (!base::StringToInt64(value_str, &value) || value < 0)
-      continue;  // Skip invalid or negative values.
-
-    // Turn entries like graphics_total into a row named "graphics" and
-    // column named "total".
-    std::string column_name = "memtrack_";
-    size_t key_split_point = row_name.find_last_of('_');
-    if (key_split_point > 0 && key_split_point < row_name.size() - 1) {
-      row_name.substr(key_split_point + 1).AppendToString(&column_name);
-      row_name = row_name.substr(0, key_split_point);
-    } else {
-      column_name += "unknown";
-    }
-
-    // Append a row to the memory dump.
-    std::string dump_name;
-    dump_name.reserve(arraysize(kDumpBaseName) + row_name.size() + 1);
-    dump_name.assign(kDumpBaseName);
-    row_name.AppendToString(&dump_name);
-    MemoryAllocatorDump* mad = pmd->GetOrCreateAllocatorDump(dump_name);
-    const auto& long_lived_column_name = key_names_.insert(column_name).first;
-    mad->AddScalar(long_lived_column_name->c_str(),
-                   MemoryAllocatorDump::kUnitsBytes, value);
-  }
-}
-
-GraphicsMemoryDumpProvider::GraphicsMemoryDumpProvider() {}
-
-GraphicsMemoryDumpProvider::~GraphicsMemoryDumpProvider() {}
-
-}  // namespace tracing