profiling.cc revision 1320f92c476a1ad9d19dba2a48c72b75566198e9
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/profiling.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/at_exit.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/command_line.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/debug/profiler.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/lazy_instance.h" 129ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "base/message_loop/message_loop.h" 13868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/strings/string_util.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/threading/thread.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chrome/common/chrome_switches.h" 161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "gin/public/debug.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "v8/include/v8.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 207dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 217dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochbase::debug::AddDynamicSymbol add_dynamic_symbol_func = NULL; 227dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochbase::debug::MoveDynamicSymbol move_dynamic_symbol_func = NULL; 237dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 247dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdochvoid JitCodeEventHandler(const v8::JitCodeEvent* event) { 257dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch DCHECK_NE(static_cast<base::debug::AddDynamicSymbol>(NULL), 267dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch add_dynamic_symbol_func); 277dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch DCHECK_NE(static_cast<base::debug::MoveDynamicSymbol>(NULL), 287dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch move_dynamic_symbol_func); 297dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 307dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch switch (event->type) { 317dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch case v8::JitCodeEvent::CODE_ADDED: 327dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch add_dynamic_symbol_func(event->code_start, event->code_len, 337dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch event->name.str, event->name.len); 347dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch break; 357dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 367dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch case v8::JitCodeEvent::CODE_MOVED: 377dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch move_dynamic_symbol_func(event->code_start, event->new_code_start); 387dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch break; 397dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 407dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch default: 417dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch break; 427dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 437dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch} 447dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string GetProfileName() { 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const char kDefaultProfileName[] = "chrome-profile-{type}-{pid}"; 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CR_DEFINE_STATIC_LOCAL(std::string, profile_name, ()); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (profile_name.empty()) { 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const CommandLine& command_line = *CommandLine::ForCurrentProcess(); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (command_line.HasSwitch(switches::kProfilingFile)) 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) profile_name = command_line.GetSwitchValueASCII(switches::kProfilingFile); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) profile_name = std::string(kDefaultProfileName); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string process_type = 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) command_line.GetSwitchValueASCII(switches::kProcessType); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string type = process_type.empty() ? 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string("browser") : std::string(process_type); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReplaceSubstringsAfterOffset(&profile_name, 0, "{type}", type.c_str()); 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return profile_name; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void FlushProfilingData(base::Thread* thread) { 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const int kProfilingFlushSeconds = 10; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!Profiling::BeingProfiled()) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::debug::FlushProfiling(); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static int flush_seconds; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!flush_seconds) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const CommandLine& command_line = *CommandLine::ForCurrentProcess(); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string profiling_flush = 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) command_line.GetSwitchValueASCII(switches::kProfilingFlush); 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!profiling_flush.empty()) { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) flush_seconds = atoi(profiling_flush.c_str()); 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(flush_seconds > 0); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) flush_seconds = kProfilingFlushSeconds; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread->message_loop()->PostDelayedTask( 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FROM_HERE, 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Bind(&FlushProfilingData, thread), 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeDelta::FromSeconds(flush_seconds)); 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ProfilingThreadControl { 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ProfilingThreadControl() : thread_(NULL) {} 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void Start() { 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::AutoLock locked(lock_); 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (thread_ && thread_->IsRunning()) 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread_ = new base::Thread("Profiling_Flush"); 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread_->Start(); 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread_->message_loop()->PostTask( 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) FROM_HERE, base::Bind(&FlushProfilingData, thread_)); 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void Stop() { 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::AutoLock locked(lock_); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!thread_ || !thread_->IsRunning()) 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread_->Stop(); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delete thread_; 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) thread_ = NULL; 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Thread* thread_; 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Lock lock_; 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(ProfilingThreadControl); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::LazyInstance<ProfilingThreadControl>::Leaky 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_flush_thread_control = LAZY_INSTANCE_INITIALIZER; 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Profiling::ProcessStarted() { 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const CommandLine& command_line = *CommandLine::ForCurrentProcess(); 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string process_type = 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) command_line.GetSwitchValueASCII(switches::kProcessType); 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1327dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // Establish the V8 profiling hooks if we're an instrumented binary. 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (base::debug::IsBinaryInstrumented()) { 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::debug::ReturnAddressLocationResolver resolve_func = 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::debug::GetProfilerReturnAddrResolutionFunc(); 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (resolve_func != NULL) { 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) v8::V8::SetReturnAddressLocationResolver(resolve_func); 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1407dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1417dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // Set up the JIT code entry handler and the symbol callbacks if the 1427dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // profiler supplies them. 1437dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // TODO(siggi): Maybe add a switch or an environment variable to turn off 1447dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch // V8 profiling? 1457dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch base::debug::DynamicFunctionEntryHook entry_hook_func = 1467dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch base::debug::GetProfilerDynamicFunctionEntryHookFunc(); 1477dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch add_dynamic_symbol_func = base::debug::GetProfilerAddDynamicSymbolFunc(); 1487dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch move_dynamic_symbol_func = base::debug::GetProfilerMoveDynamicSymbolFunc(); 1497dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch 1501320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci if (entry_hook_func != NULL && 1517dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch add_dynamic_symbol_func != NULL && 1527dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch move_dynamic_symbol_func != NULL) { 1531320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci gin::Debug::SetFunctionEntryHook(entry_hook_func); 1541320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci gin::Debug::SetJitCodeEventHandler(&JitCodeEventHandler); 1557dbb3d5cf0c15f500944d211057644d6a2f37371Ben Murdoch } 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (command_line.HasSwitch(switches::kProfilingAtStart)) { 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string process_type_to_start = 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) command_line.GetSwitchValueASCII(switches::kProfilingAtStart); 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (process_type == process_type_to_start) 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Start(); 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Profiling::Start() { 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const CommandLine& command_line = *CommandLine::ForCurrentProcess(); 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool flush = command_line.HasSwitch(switches::kProfilingFlush); 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::debug::StartProfiling(GetProfileName()); 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Schedule profile data flushing for single process because it doesn't 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // get written out correctly on exit. 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (flush) 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_flush_thread_control.Get().Start(); 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Profiling::Stop() { 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) g_flush_thread_control.Get().Stop(); 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::debug::StopProfiling(); 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool Profiling::BeingProfiled() { 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::debug::BeingProfiled(); 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Profiling::Toggle() { 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (BeingProfiled()) 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Stop(); 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Start(); 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 196