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tracy/client/TracySysTrace.cpp
Bartosz Taudul 250ef2cf6e
Change thread id size from 64 to 32 bits. 
Both Windows and Linux use 32-bit thread identifiers. MacOS has a 64-bit
counter, but in practice it will never overflow during profiling and no false
aliasing will happen.

These changes are only done client-side and in the network protocol. The
server still uses 64-bit thread identifiers, to enable virtual threads, etc.
2021-10-08 00:42:52 +02:00

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#include "TracyDebug.hpp"
#include "TracySysTrace.hpp"
#include "../common/TracySystem.hpp"
#ifdef TRACY_HAS_SYSTEM_TRACING
#ifndef TRACY_SAMPLING_HZ
# if defined _WIN32
# define TRACY_SAMPLING_HZ 8000
# elif defined __linux__
# define TRACY_SAMPLING_HZ 10000
# endif
#endif
namespace tracy
{
static constexpr int GetSamplingFrequency()
{
#if defined _WIN32
return TRACY_SAMPLING_HZ > 8000 ? 8000 : ( TRACY_SAMPLING_HZ < 1 ? 1 : TRACY_SAMPLING_HZ );
#else
return TRACY_SAMPLING_HZ > 1000000 ? 1000000 : ( TRACY_SAMPLING_HZ < 1 ? 1 : TRACY_SAMPLING_HZ );
#endif
}
static constexpr int GetSamplingPeriod()
{
return 1000000000 / GetSamplingFrequency();
}
}
# if defined _WIN32
# ifndef NOMINMAX
# define NOMINMAX
# endif
# define INITGUID
# include <assert.h>
# include <string.h>
# include <windows.h>
# include <dbghelp.h>
# include <evntrace.h>
# include <evntcons.h>
# include <psapi.h>
# include <winternl.h>
# include "../common/TracyAlloc.hpp"
# include "../common/TracySystem.hpp"
# include "TracyProfiler.hpp"
# include "TracyThread.hpp"
namespace tracy
{
static const GUID PerfInfoGuid = { 0xce1dbfb4, 0x137e, 0x4da6, { 0x87, 0xb0, 0x3f, 0x59, 0xaa, 0x10, 0x2c, 0xbc } };
static const GUID DxgKrnlGuid = { 0x802ec45a, 0x1e99, 0x4b83, { 0x99, 0x20, 0x87, 0xc9, 0x82, 0x77, 0xba, 0x9d } };
static TRACEHANDLE s_traceHandle;
static TRACEHANDLE s_traceHandle2;
static EVENT_TRACE_PROPERTIES* s_prop;
static DWORD s_pid;
static EVENT_TRACE_PROPERTIES* s_propVsync;
static TRACEHANDLE s_traceHandleVsync;
static TRACEHANDLE s_traceHandleVsync2;
Thread* s_threadVsync = nullptr;
struct CSwitch
{
uint32_t newThreadId;
uint32_t oldThreadId;
int8_t newThreadPriority;
int8_t oldThreadPriority;
uint8_t previousCState;
int8_t spareByte;
int8_t oldThreadWaitReason;
int8_t oldThreadWaitMode;
int8_t oldThreadState;
int8_t oldThreadWaitIdealProcessor;
uint32_t newThreadWaitTime;
uint32_t reserved;
};
struct ReadyThread
{
uint32_t threadId;
int8_t adjustReason;
int8_t adjustIncrement;
int8_t flag;
int8_t reserverd;
};
struct ThreadTrace
{
uint32_t processId;
uint32_t threadId;
uint32_t stackBase;
uint32_t stackLimit;
uint32_t userStackBase;
uint32_t userStackLimit;
uint32_t startAddr;
uint32_t win32StartAddr;
uint32_t tebBase;
uint32_t subProcessTag;
};
struct StackWalkEvent
{
uint64_t eventTimeStamp;
uint32_t stackProcess;
uint32_t stackThread;
uint64_t stack[192];
};
struct VSyncInfo
{
void* dxgAdapter;
uint32_t vidPnTargetId;
uint64_t scannedPhysicalAddress;
uint32_t vidPnSourceId;
uint32_t frameNumber;
int64_t frameQpcTime;
void* hFlipDevice;
uint32_t flipType;
uint64_t flipFenceId;
};
extern "C" typedef NTSTATUS (WINAPI *t_NtQueryInformationThread)( HANDLE, THREADINFOCLASS, PVOID, ULONG, PULONG );
extern "C" typedef BOOL (WINAPI *t_EnumProcessModules)( HANDLE, HMODULE*, DWORD, LPDWORD );
extern "C" typedef BOOL (WINAPI *t_GetModuleInformation)( HANDLE, HMODULE, LPMODULEINFO, DWORD );
extern "C" typedef DWORD (WINAPI *t_GetModuleBaseNameA)( HANDLE, HMODULE, LPSTR, DWORD );
extern "C" typedef HRESULT (WINAPI *t_GetThreadDescription)( HANDLE, PWSTR* );
t_NtQueryInformationThread NtQueryInformationThread = (t_NtQueryInformationThread)GetProcAddress( GetModuleHandleA( "ntdll.dll" ), "NtQueryInformationThread" );
t_EnumProcessModules _EnumProcessModules = (t_EnumProcessModules)GetProcAddress( GetModuleHandleA( "kernel32.dll" ), "K32EnumProcessModules" );
t_GetModuleInformation _GetModuleInformation = (t_GetModuleInformation)GetProcAddress( GetModuleHandleA( "kernel32.dll" ), "K32GetModuleInformation" );
t_GetModuleBaseNameA _GetModuleBaseNameA = (t_GetModuleBaseNameA)GetProcAddress( GetModuleHandleA( "kernel32.dll" ), "K32GetModuleBaseNameA" );
static t_GetThreadDescription _GetThreadDescription = 0;
void WINAPI EventRecordCallback( PEVENT_RECORD record )
{
#ifdef TRACY_ON_DEMAND
if( !GetProfiler().IsConnected() ) return;
#endif
const auto& hdr = record->EventHeader;
switch( hdr.ProviderId.Data1 )
{
case 0x3d6fa8d1: // Thread Guid
if( hdr.EventDescriptor.Opcode == 36 )
{
const auto cswitch = (const CSwitch*)record->UserData;
TracyLfqPrepare( QueueType::ContextSwitch );
MemWrite( &item->contextSwitch.time, hdr.TimeStamp.QuadPart );
MemWrite( &item->contextSwitch.oldThread, cswitch->oldThreadId );
MemWrite( &item->contextSwitch.newThread, cswitch->newThreadId );
MemWrite( &item->contextSwitch.cpu, record->BufferContext.ProcessorNumber );
MemWrite( &item->contextSwitch.reason, cswitch->oldThreadWaitReason );
MemWrite( &item->contextSwitch.state, cswitch->oldThreadState );
TracyLfqCommit;
}
else if( hdr.EventDescriptor.Opcode == 50 )
{
const auto rt = (const ReadyThread*)record->UserData;
TracyLfqPrepare( QueueType::ThreadWakeup );
MemWrite( &item->threadWakeup.time, hdr.TimeStamp.QuadPart );
MemWrite( &item->threadWakeup.thread, rt->threadId );
TracyLfqCommit;
}
else if( hdr.EventDescriptor.Opcode == 1 || hdr.EventDescriptor.Opcode == 3 )
{
const auto tt = (const ThreadTrace*)record->UserData;
uint64_t tid = tt->threadId;
if( tid == 0 ) return;
uint64_t pid = tt->processId;
TracyLfqPrepare( QueueType::TidToPid );
MemWrite( &item->tidToPid.tid, tid );
MemWrite( &item->tidToPid.pid, pid );
TracyLfqCommit;
}
break;
case 0xdef2fe46: // StackWalk Guid
if( hdr.EventDescriptor.Opcode == 32 )
{
const auto sw = (const StackWalkEvent*)record->UserData;
if( sw->stackProcess == s_pid )
{
const uint64_t sz = ( record->UserDataLength - 16 ) / 8;
if( sz > 0 )
{
auto trace = (uint64_t*)tracy_malloc( ( 1 + sz ) * sizeof( uint64_t ) );
memcpy( trace, &sz, sizeof( uint64_t ) );
memcpy( trace+1, sw->stack, sizeof( uint64_t ) * sz );
TracyLfqPrepare( QueueType::CallstackSample );
MemWrite( &item->callstackSampleFat.time, sw->eventTimeStamp );
MemWrite( &item->callstackSampleFat.thread, sw->stackThread );
MemWrite( &item->callstackSampleFat.ptr, (uint64_t)trace );
TracyLfqCommit;
}
}
}
break;
default:
break;
}
}
static constexpr const char* VsyncName[] = {
"[0] Vsync",
"[1] Vsync",
"[2] Vsync",
"[3] Vsync",
"[4] Vsync",
"[5] Vsync",
"[6] Vsync",
"[7] Vsync",
"Vsync"
};
static uint32_t VsyncTarget[8] = {};
void WINAPI EventRecordCallbackVsync( PEVENT_RECORD record )
{
#ifdef TRACY_ON_DEMAND
if( !GetProfiler().IsConnected() ) return;
#endif
const auto& hdr = record->EventHeader;
assert( hdr.ProviderId.Data1 == 0x802EC45A );
assert( hdr.EventDescriptor.Id == 0x0011 );
const auto vs = (const VSyncInfo*)record->UserData;
int idx = 0;
do
{
if( VsyncTarget[idx] == 0 )
{
VsyncTarget[idx] = vs->vidPnTargetId;
break;
}
else if( VsyncTarget[idx] == vs->vidPnTargetId )
{
break;
}
}
while( ++idx < 8 );
TracyLfqPrepare( QueueType::FrameMarkMsg );
MemWrite( &item->frameMark.time, hdr.TimeStamp.QuadPart );
MemWrite( &item->frameMark.name, uint64_t( VsyncName[idx] ) );
TracyLfqCommit;
}
static void SetupVsync()
{
#if _WIN32_WINNT >= _WIN32_WINNT_WINBLUE
const auto psz = sizeof( EVENT_TRACE_PROPERTIES ) + MAX_PATH;
s_propVsync = (EVENT_TRACE_PROPERTIES*)tracy_malloc( psz );
memset( s_propVsync, 0, sizeof( EVENT_TRACE_PROPERTIES ) );
s_propVsync->LogFileMode = EVENT_TRACE_REAL_TIME_MODE;
s_propVsync->Wnode.BufferSize = psz;
#ifdef TRACY_TIMER_QPC
s_propVsync->Wnode.ClientContext = 1;
#else
s_propVsync->Wnode.ClientContext = 3;
#endif
s_propVsync->LoggerNameOffset = sizeof( EVENT_TRACE_PROPERTIES );
strcpy( ((char*)s_propVsync) + sizeof( EVENT_TRACE_PROPERTIES ), "TracyVsync" );
auto backup = tracy_malloc( psz );
memcpy( backup, s_propVsync, psz );
const auto controlStatus = ControlTraceA( 0, "TracyVsync", s_propVsync, EVENT_TRACE_CONTROL_STOP );
if( controlStatus != ERROR_SUCCESS && controlStatus != ERROR_WMI_INSTANCE_NOT_FOUND )
{
tracy_free( backup );
tracy_free( s_propVsync );
return;
}
memcpy( s_propVsync, backup, psz );
tracy_free( backup );
const auto startStatus = StartTraceA( &s_traceHandleVsync, "TracyVsync", s_propVsync );
if( startStatus != ERROR_SUCCESS )
{
tracy_free( s_propVsync );
return;
}
EVENT_FILTER_EVENT_ID fe = {};
fe.FilterIn = TRUE;
fe.Count = 1;
fe.Events[0] = 0x0011; // VSyncDPC_Info
EVENT_FILTER_DESCRIPTOR desc = {};
desc.Ptr = (ULONGLONG)&fe;
desc.Size = sizeof( fe );
desc.Type = EVENT_FILTER_TYPE_EVENT_ID;
ENABLE_TRACE_PARAMETERS params = {};
params.Version = ENABLE_TRACE_PARAMETERS_VERSION_2;
params.EnableProperty = EVENT_ENABLE_PROPERTY_IGNORE_KEYWORD_0;
params.SourceId = s_propVsync->Wnode.Guid;
params.EnableFilterDesc = &desc;
params.FilterDescCount = 1;
uint64_t mask = 0x4000000000000001; // Microsoft_Windows_DxgKrnl_Performance | Base
if( EnableTraceEx2( s_traceHandleVsync, &DxgKrnlGuid, EVENT_CONTROL_CODE_ENABLE_PROVIDER, TRACE_LEVEL_INFORMATION, mask, mask, 0, &params ) != ERROR_SUCCESS )
{
tracy_free( s_propVsync );
return;
}
char loggerName[MAX_PATH];
strcpy( loggerName, "TracyVsync" );
EVENT_TRACE_LOGFILEA log = {};
log.LoggerName = loggerName;
log.ProcessTraceMode = PROCESS_TRACE_MODE_REAL_TIME | PROCESS_TRACE_MODE_EVENT_RECORD | PROCESS_TRACE_MODE_RAW_TIMESTAMP;
log.EventRecordCallback = EventRecordCallbackVsync;
s_traceHandleVsync2 = OpenTraceA( &log );
if( s_traceHandleVsync2 == (TRACEHANDLE)INVALID_HANDLE_VALUE )
{
CloseTrace( s_traceHandleVsync );
tracy_free( s_propVsync );
return;
}
s_threadVsync = (Thread*)tracy_malloc( sizeof( Thread ) );
new(s_threadVsync) Thread( [] (void*) {
ThreadExitHandler threadExitHandler;
SetThreadPriority( GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL );
SetThreadName( "Tracy Vsync" );
ProcessTrace( &s_traceHandleVsync2, 1, nullptr, nullptr );
}, nullptr );
#endif
}
static constexpr int GetSamplingInterval()
{
return GetSamplingPeriod() / 100;
}
bool SysTraceStart( int64_t& samplingPeriod )
{
if( !_GetThreadDescription ) _GetThreadDescription = (t_GetThreadDescription)GetProcAddress( GetModuleHandleA( "kernel32.dll" ), "GetThreadDescription" );
s_pid = GetCurrentProcessId();
#if defined _WIN64
constexpr bool isOs64Bit = true;
#else
BOOL _iswow64;
IsWow64Process( GetCurrentProcess(), &_iswow64 );
const bool isOs64Bit = _iswow64;
#endif
TOKEN_PRIVILEGES priv = {};
priv.PrivilegeCount = 1;
priv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if( LookupPrivilegeValue( nullptr, SE_SYSTEM_PROFILE_NAME, &priv.Privileges[0].Luid ) == 0 ) return false;
HANDLE pt;
if( OpenProcessToken( GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &pt ) == 0 ) return false;
const auto adjust = AdjustTokenPrivileges( pt, FALSE, &priv, 0, nullptr, nullptr );
CloseHandle( pt );
if( adjust == 0 ) return false;
const auto status = GetLastError();
if( status != ERROR_SUCCESS ) return false;
if( isOs64Bit )
{
TRACE_PROFILE_INTERVAL interval = {};
interval.Interval = GetSamplingInterval();
const auto intervalStatus = TraceSetInformation( 0, TraceSampledProfileIntervalInfo, &interval, sizeof( interval ) );
if( intervalStatus != ERROR_SUCCESS ) return false;
samplingPeriod = GetSamplingPeriod();
}
const auto psz = sizeof( EVENT_TRACE_PROPERTIES ) + sizeof( KERNEL_LOGGER_NAME );
s_prop = (EVENT_TRACE_PROPERTIES*)tracy_malloc( psz );
memset( s_prop, 0, sizeof( EVENT_TRACE_PROPERTIES ) );
ULONG flags = 0;
#ifndef TRACY_NO_CONTEXT_SWITCH
flags = EVENT_TRACE_FLAG_CSWITCH | EVENT_TRACE_FLAG_DISPATCHER | EVENT_TRACE_FLAG_THREAD;
#endif
#ifndef TRACY_NO_SAMPLING
if( isOs64Bit ) flags |= EVENT_TRACE_FLAG_PROFILE;
#endif
s_prop->EnableFlags = flags;
s_prop->LogFileMode = EVENT_TRACE_REAL_TIME_MODE;
s_prop->Wnode.BufferSize = psz;
s_prop->Wnode.Flags = WNODE_FLAG_TRACED_GUID;
#ifdef TRACY_TIMER_QPC
s_prop->Wnode.ClientContext = 1;
#else
s_prop->Wnode.ClientContext = 3;
#endif
s_prop->Wnode.Guid = SystemTraceControlGuid;
s_prop->BufferSize = 1024;
s_prop->MinimumBuffers = std::thread::hardware_concurrency() * 4;
s_prop->MaximumBuffers = std::thread::hardware_concurrency() * 6;
s_prop->LoggerNameOffset = sizeof( EVENT_TRACE_PROPERTIES );
memcpy( ((char*)s_prop) + sizeof( EVENT_TRACE_PROPERTIES ), KERNEL_LOGGER_NAME, sizeof( KERNEL_LOGGER_NAME ) );
auto backup = tracy_malloc( psz );
memcpy( backup, s_prop, psz );
const auto controlStatus = ControlTrace( 0, KERNEL_LOGGER_NAME, s_prop, EVENT_TRACE_CONTROL_STOP );
if( controlStatus != ERROR_SUCCESS && controlStatus != ERROR_WMI_INSTANCE_NOT_FOUND )
{
tracy_free( backup );
tracy_free( s_prop );
return false;
}
memcpy( s_prop, backup, psz );
tracy_free( backup );
const auto startStatus = StartTrace( &s_traceHandle, KERNEL_LOGGER_NAME, s_prop );
if( startStatus != ERROR_SUCCESS )
{
tracy_free( s_prop );
return false;
}
if( isOs64Bit )
{
CLASSIC_EVENT_ID stackId;
stackId.EventGuid = PerfInfoGuid;
stackId.Type = 46;
const auto stackStatus = TraceSetInformation( s_traceHandle, TraceStackTracingInfo, &stackId, sizeof( stackId ) );
if( stackStatus != ERROR_SUCCESS )
{
tracy_free( s_prop );
return false;
}
}
#ifdef UNICODE
WCHAR KernelLoggerName[sizeof( KERNEL_LOGGER_NAME )];
#else
char KernelLoggerName[sizeof( KERNEL_LOGGER_NAME )];
#endif
memcpy( KernelLoggerName, KERNEL_LOGGER_NAME, sizeof( KERNEL_LOGGER_NAME ) );
EVENT_TRACE_LOGFILE log = {};
log.LoggerName = KernelLoggerName;
log.ProcessTraceMode = PROCESS_TRACE_MODE_REAL_TIME | PROCESS_TRACE_MODE_EVENT_RECORD | PROCESS_TRACE_MODE_RAW_TIMESTAMP;
log.EventRecordCallback = EventRecordCallback;
s_traceHandle2 = OpenTrace( &log );
if( s_traceHandle2 == (TRACEHANDLE)INVALID_HANDLE_VALUE )
{
CloseTrace( s_traceHandle );
tracy_free( s_prop );
return false;
}
#ifndef TRACY_NO_VSYNC_CAPTURE
SetupVsync();
#endif
return true;
}
void SysTraceStop()
{
if( s_threadVsync )
{
CloseTrace( s_traceHandleVsync2 );
CloseTrace( s_traceHandleVsync );
s_threadVsync->~Thread();
tracy_free( s_threadVsync );
}
CloseTrace( s_traceHandle2 );
CloseTrace( s_traceHandle );
}
void SysTraceWorker( void* ptr )
{
ThreadExitHandler threadExitHandler;
SetThreadPriority( GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL );
SetThreadName( "Tracy SysTrace" );
ProcessTrace( &s_traceHandle2, 1, 0, 0 );
ControlTrace( 0, KERNEL_LOGGER_NAME, s_prop, EVENT_TRACE_CONTROL_STOP );
tracy_free( s_prop );
}
void SysTraceSendExternalName( uint64_t thread )
{
bool threadSent = false;
auto hnd = OpenThread( THREAD_QUERY_INFORMATION, FALSE, DWORD( thread ) );
if( hnd == 0 )
{
hnd = OpenThread( THREAD_QUERY_LIMITED_INFORMATION, FALSE, DWORD( thread ) );
}
if( hnd != 0 )
{
if( _GetThreadDescription )
{
PWSTR tmp;
_GetThreadDescription( hnd, &tmp );
char buf[256];
if( tmp )
{
auto ret = wcstombs( buf, tmp, 256 );
if( ret != 0 )
{
GetProfiler().SendString( thread, buf, ret, QueueType::ExternalThreadName );
threadSent = true;
}
}
}
const auto pid = GetProcessIdOfThread( hnd );
if( !threadSent && NtQueryInformationThread && _EnumProcessModules && _GetModuleInformation && _GetModuleBaseNameA )
{
void* ptr;
ULONG retlen;
auto status = NtQueryInformationThread( hnd, (THREADINFOCLASS)9 /*ThreadQuerySetWin32StartAddress*/, &ptr, sizeof( &ptr ), &retlen );
if( status == 0 )
{
const auto phnd = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pid );
if( phnd != INVALID_HANDLE_VALUE )
{
HMODULE modules[1024];
DWORD needed;
if( _EnumProcessModules( phnd, modules, 1024 * sizeof( HMODULE ), &needed ) != 0 )
{
const auto sz = std::min( DWORD( needed / sizeof( HMODULE ) ), DWORD( 1024 ) );
for( DWORD i=0; i<sz; i++ )
{
MODULEINFO info;
if( _GetModuleInformation( phnd, modules[i], &info, sizeof( info ) ) != 0 )
{
if( (uint64_t)ptr >= (uint64_t)info.lpBaseOfDll && (uint64_t)ptr <= (uint64_t)info.lpBaseOfDll + (uint64_t)info.SizeOfImage )
{
char buf2[1024];
const auto modlen = _GetModuleBaseNameA( phnd, modules[i], buf2, 1024 );
if( modlen != 0 )
{
GetProfiler().SendString( thread, buf2, modlen, QueueType::ExternalThreadName );
threadSent = true;
}
}
}
}
}
CloseHandle( phnd );
}
}
}
CloseHandle( hnd );
if( !threadSent )
{
GetProfiler().SendString( thread, "???", 3, QueueType::ExternalThreadName );
threadSent = true;
}
if( pid != 0 )
{
{
uint64_t _pid = pid;
TracyLfqPrepare( QueueType::TidToPid );
MemWrite( &item->tidToPid.tid, thread );
MemWrite( &item->tidToPid.pid, _pid );
TracyLfqCommit;
}
if( pid == 4 )
{
GetProfiler().SendString( thread, "System", 6, QueueType::ExternalName );
return;
}
else
{
const auto phnd = OpenProcess( PROCESS_QUERY_LIMITED_INFORMATION, FALSE, pid );
if( phnd != INVALID_HANDLE_VALUE )
{
char buf2[1024];
const auto sz = GetProcessImageFileNameA( phnd, buf2, 1024 );
CloseHandle( phnd );
if( sz != 0 )
{
auto ptr = buf2 + sz - 1;
while( ptr > buf2 && *ptr != '\\' ) ptr--;
if( *ptr == '\\' ) ptr++;
GetProfiler().SendString( thread, ptr, QueueType::ExternalName );
return;
}
}
}
}
}
if( !threadSent )
{
GetProfiler().SendString( thread, "???", 3, QueueType::ExternalThreadName );
}
GetProfiler().SendString( thread, "???", 3, QueueType::ExternalName );
}
}
# elif defined __linux__
# include <sys/types.h>
# include <sys/stat.h>
# include <sys/wait.h>
# include <fcntl.h>
# include <inttypes.h>
# include <limits>
# include <poll.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <unistd.h>
# include <atomic>
# include <thread>
# include <linux/perf_event.h>
# include <linux/version.h>
# include <sys/mman.h>
# include <sys/ioctl.h>
# include <sys/syscall.h>
# include "TracyProfiler.hpp"
# include "TracyRingBuffer.hpp"
# include "TracyThread.hpp"
# ifdef __ANDROID__
# include "TracySysTracePayload.hpp"
# endif
# ifdef __AVX2__
# include <immintrin.h>
# endif
namespace tracy
{
static const char BasePath[] = "/sys/kernel/debug/tracing/";
static const char TracingOn[] = "tracing_on";
static const char CurrentTracer[] = "current_tracer";
static const char TraceOptions[] = "trace_options";
static const char TraceClock[] = "trace_clock";
static const char SchedSwitch[] = "events/sched/sched_switch/enable";
static const char SchedWakeup[] = "events/sched/sched_wakeup/enable";
static const char BufferSizeKb[] = "buffer_size_kb";
static const char TracePipe[] = "trace_pipe";
static std::atomic<bool> traceActive { false };
static Thread* s_threadSampling = nullptr;
static int s_numCpus = 0;
static int s_numBuffers = 0;
static constexpr size_t RingBufSize = 64*1024;
static RingBuffer<RingBufSize>* s_ring = nullptr;
static int perf_event_open( struct perf_event_attr* hw_event, pid_t pid, int cpu, int group_fd, unsigned long flags )
{
return syscall( __NR_perf_event_open, hw_event, pid, cpu, group_fd, flags );
}
enum TraceEventId
{
EventCallstack,
EventCpuCycles,
EventInstructionsRetired,
EventCacheReference,
EventCacheMiss,
EventBranchRetired,
EventBranchMiss
};
static void ProbePreciseIp( perf_event_attr& pe, unsigned long long config0, unsigned long long config1, pid_t pid )
{
pe.config = config1;
pe.precise_ip = 3;
while( pe.precise_ip != 0 )
{
const int fd = perf_event_open( &pe, pid, 0, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
close( fd );
break;
}
pe.precise_ip--;
}
pe.config = config0;
while( pe.precise_ip != 0 )
{
const int fd = perf_event_open( &pe, pid, 0, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
close( fd );
break;
}
pe.precise_ip--;
}
TracyDebug( " Probed precise_ip: %i\n", pe.precise_ip );
}
static void ProbePreciseIp( perf_event_attr& pe, pid_t pid )
{
pe.precise_ip = 3;
while( pe.precise_ip != 0 )
{
const int fd = perf_event_open( &pe, pid, 0, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
close( fd );
break;
}
pe.precise_ip--;
}
TracyDebug( " Probed precise_ip: %i\n", pe.precise_ip );
}
static bool IsGenuineIntel()
{
#if defined __i386 || defined __x86_64__
uint32_t regs[4];
__get_cpuid( 0, regs, regs+1, regs+2, regs+3 );
char manufacturer[12];
memcpy( manufacturer, regs+1, 4 );
memcpy( manufacturer+4, regs+3, 4 );
memcpy( manufacturer+8, regs+2, 4 );
return memcmp( manufacturer, "GenuineIntel", 12 ) == 0;
#else
return false;
#endif
}
static void SetupSampling( int64_t& samplingPeriod )
{
#ifndef CLOCK_MONOTONIC_RAW
return;
#endif
#ifdef TRACY_NO_SAMPLE_RETIREMENT
const bool noRetirement = true;
#else
const char* noRetirementEnv = GetEnvVar( "TRACY_NO_SAMPLE_RETIREMENT" );
const bool noRetirement = noRetirementEnv && noRetirementEnv[0] == '1';
#endif
#ifdef TRACY_NO_SAMPLE_CACHE
const bool noCache = true;
#else
const char* noCacheEnv = GetEnvVar( "TRACY_NO_SAMPLE_CACHE" );
const bool noCache = noCacheEnv && noCacheEnv[0] == '1';
#endif
#ifdef TRACY_NO_SAMPLE_BRANCH
const bool noBranch = true;
#else
const char* noBranchEnv = GetEnvVar( "TRACY_NO_SAMPLE_BRANCH" );
const bool noBranch = noBranchEnv && noBranchEnv[0] == '1';
#endif
samplingPeriod = GetSamplingPeriod();
uint32_t currentPid = (uint32_t)getpid();
s_numCpus = (int)std::thread::hardware_concurrency();
s_ring = (RingBuffer<RingBufSize>*)tracy_malloc( sizeof( RingBuffer<RingBufSize> ) * s_numCpus * 7 );
s_numBuffers = 0;
// Stack traces
perf_event_attr pe = {};
pe.type = PERF_TYPE_SOFTWARE;
pe.size = sizeof( perf_event_attr );
pe.config = PERF_COUNT_SW_CPU_CLOCK;
pe.sample_freq = GetSamplingFrequency();
pe.sample_type = PERF_SAMPLE_TID | PERF_SAMPLE_TIME | PERF_SAMPLE_CALLCHAIN;
#if LINUX_VERSION_CODE >= KERNEL_VERSION( 4, 8, 0 )
pe.sample_max_stack = 127;
#endif
pe.disabled = 1;
pe.freq = 1;
pe.inherit = 1;
#if !defined TRACY_HW_TIMER || !( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
pe.use_clockid = 1;
pe.clockid = CLOCK_MONOTONIC_RAW;
#endif
TracyDebug( "Setup software sampling\n" );
ProbePreciseIp( pe, currentPid );
for( int i=0; i<s_numCpus; i++ )
{
const int fd = perf_event_open( &pe, currentPid, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd == -1 )
{
for( int j=0; j<s_numBuffers; j++ ) s_ring[j].~RingBuffer<RingBufSize>();
tracy_free( s_ring );
return;
}
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventCallstack );
s_numBuffers++;
}
// CPU cycles + instructions retired
pe = {};
pe.type = PERF_TYPE_HARDWARE;
pe.size = sizeof( perf_event_attr );
pe.sample_freq = 5000;
pe.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TIME;
pe.disabled = 1;
pe.exclude_kernel = 1;
pe.exclude_guest = 1;
pe.exclude_hv = 1;
pe.freq = 1;
pe.inherit = 1;
#if !defined TRACY_HW_TIMER || !( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
pe.use_clockid = 1;
pe.clockid = CLOCK_MONOTONIC_RAW;
#endif
if( !noRetirement )
{
TracyDebug( "Setup sampling cycles + retirement\n" );
ProbePreciseIp( pe, PERF_COUNT_HW_CPU_CYCLES, PERF_COUNT_HW_INSTRUCTIONS, currentPid );
for( int i=0; i<s_numCpus; i++ )
{
const int fd = perf_event_open( &pe, currentPid, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventCpuCycles );
s_numBuffers++;
TracyDebug( " Core %i ok\n", i );
}
}
pe.config = PERF_COUNT_HW_INSTRUCTIONS;
for( int i=0; i<s_numCpus; i++ )
{
const int fd = perf_event_open( &pe, currentPid, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventInstructionsRetired );
s_numBuffers++;
TracyDebug( " Core %i ok\n", i );
}
}
}
// cache reference + miss
if( !noCache )
{
TracyDebug( "Setup sampling CPU cache references + misses\n" );
ProbePreciseIp( pe, PERF_COUNT_HW_CACHE_REFERENCES, PERF_COUNT_HW_CACHE_MISSES, currentPid );
if( IsGenuineIntel() )
{
pe.precise_ip = 0;
TracyDebug( " CPU is GenuineIntel, forcing precise_ip down to 0\n" );
}
for( int i=0; i<s_numCpus; i++ )
{
const int fd = perf_event_open( &pe, currentPid, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventCacheReference );
s_numBuffers++;
TracyDebug( " Core %i ok\n", i );
}
}
pe.config = PERF_COUNT_HW_CACHE_MISSES;
for( int i=0; i<s_numCpus; i++ )
{
const int fd = perf_event_open( &pe, currentPid, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventCacheMiss );
s_numBuffers++;
TracyDebug( " Core %i ok\n", i );
}
}
}
// branch retired + miss
if( !noBranch )
{
TracyDebug( "Setup sampling CPU branch retirements + misses\n" );
ProbePreciseIp( pe, PERF_COUNT_HW_BRANCH_INSTRUCTIONS, PERF_COUNT_HW_BRANCH_MISSES, currentPid );
for( int i=0; i<s_numCpus; i++ )
{
const int fd = perf_event_open( &pe, currentPid, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventBranchRetired );
s_numBuffers++;
TracyDebug( " Core %i ok\n", i );
}
}
pe.config = PERF_COUNT_HW_BRANCH_MISSES;
for( int i=0; i<s_numCpus; i++ )
{
const int fd = perf_event_open( &pe, currentPid, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventBranchMiss );
s_numBuffers++;
TracyDebug( " Core %i ok\n", i );
}
}
}
s_threadSampling = (Thread*)tracy_malloc( sizeof( Thread ) );
new(s_threadSampling) Thread( [] (void*) {
ThreadExitHandler threadExitHandler;
SetThreadName( "Tracy Sampling" );
InitRpmalloc();
sched_param sp = { 5 };
pthread_setschedparam( pthread_self(), SCHED_FIFO, &sp );
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
for( int i=0; i<s_numBuffers; i++ )
{
if( s_ring[i].GetId() == EventCallstack && !s_ring[i].CheckTscCaps() )
{
for( int j=0; j<s_numBuffers; j++ ) s_ring[j].~RingBuffer<RingBufSize>();
tracy_free_fast( s_ring );
const char* err = "Tracy Profiler: sampling is disabled due to non-native scheduler clock. Are you running under a VM?";
Profiler::MessageAppInfo( err, strlen( err ) );
return;
}
}
#endif
for( int i=0; i<s_numBuffers; i++ ) s_ring[i].Enable();
for(;;)
{
bool hadData = false;
for( int i=0; i<s_numBuffers; i++ )
{
if( !traceActive.load( std::memory_order_relaxed ) ) break;
auto& ring = s_ring[i];
const auto head = ring.LoadHead();
const auto tail = ring.GetTail();
if( head == tail ) continue;
assert( head > tail );
hadData = true;
const auto end = head - tail;
uint64_t pos = 0;
while( pos < end )
{
perf_event_header hdr;
ring.Read( &hdr, pos, sizeof( perf_event_header ) );
if( hdr.type == PERF_RECORD_SAMPLE )
{
auto offset = pos + sizeof( perf_event_header );
const auto id = ring.GetId();
if( id == EventCallstack )
{
// Layout:
// u32 pid, tid
// u64 time
// u64 cnt
// u64 ip[cnt]
uint32_t tid;
uint64_t t0;
uint64_t cnt;
offset += sizeof( uint32_t );
ring.Read( &tid, offset, sizeof( uint32_t ) );
offset += sizeof( uint32_t );
ring.Read( &t0, offset, sizeof( uint64_t ) );
offset += sizeof( uint64_t );
ring.Read( &cnt, offset, sizeof( uint64_t ) );
offset += sizeof( uint64_t );
if( cnt > 0 )
{
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
t0 = ring.ConvertTimeToTsc( t0 );
if( t0 != 0 )
#endif
{
auto trace = (uint64_t*)tracy_malloc_fast( ( 1 + cnt ) * sizeof( uint64_t ) );
ring.Read( trace+1, offset, sizeof( uint64_t ) * cnt );
#if defined __x86_64__ || defined _M_X64
// remove non-canonical pointers
do
{
const auto test = (int64_t)trace[cnt];
const auto m1 = test >> 63;
const auto m2 = test >> 47;
if( m1 == m2 ) break;
}
while( --cnt > 0 );
for( uint64_t j=1; j<cnt; j++ )
{
const auto test = (int64_t)trace[j];
const auto m1 = test >> 63;
const auto m2 = test >> 47;
if( m1 != m2 ) trace[j] = 0;
}
#endif
for( uint64_t j=1; j<=cnt; j++ )
{
if( trace[j] >= (uint64_t)-4095 ) // PERF_CONTEXT_MAX
{
memmove( trace+j, trace+j+1, sizeof( uint64_t ) * ( cnt - j ) );
cnt--;
}
}
memcpy( trace, &cnt, sizeof( uint64_t ) );
TracyLfqPrepare( QueueType::CallstackSample );
MemWrite( &item->callstackSampleFat.time, t0 );
MemWrite( &item->callstackSampleFat.thread, tid );
MemWrite( &item->callstackSampleFat.ptr, (uint64_t)trace );
TracyLfqCommit;
}
}
}
else
{
// Layout:
// u64 ip
// u64 time
uint64_t ip, t0;
ring.Read( &ip, offset, sizeof( uint64_t ) );
offset += sizeof( uint64_t );
ring.Read( &t0, offset, sizeof( uint64_t ) );
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
t0 = ring.ConvertTimeToTsc( t0 );
if( t0 != 0 )
#endif
{
QueueType type;
switch( id )
{
case EventCpuCycles:
type = QueueType::HwSampleCpuCycle;
break;
case EventInstructionsRetired:
type = QueueType::HwSampleInstructionRetired;
break;
case EventCacheReference:
type = QueueType::HwSampleCacheReference;
break;
case EventCacheMiss:
type = QueueType::HwSampleCacheMiss;
break;
case EventBranchRetired:
type = QueueType::HwSampleBranchRetired;
break;
case EventBranchMiss:
type = QueueType::HwSampleBranchMiss;
break;
default:
assert( false );
break;
}
TracyLfqPrepare( type );
MemWrite( &item->hwSample.ip, ip );
MemWrite( &item->hwSample.time, t0 );
TracyLfqCommit;
}
}
}
pos += hdr.size;
}
assert( pos == end );
ring.Advance( end );
}
if( !traceActive.load( std::memory_order_relaxed) ) break;
if( !hadData )
{
std::this_thread::sleep_for( std::chrono::milliseconds( 10 ) );
}
}
for( int i=0; i<s_numBuffers; i++ ) s_ring[i].~RingBuffer<RingBufSize>();
tracy_free_fast( s_ring );
}, nullptr );
}
#ifdef __ANDROID__
static bool TraceWrite( const char* path, size_t psz, const char* val, size_t vsz )
{
// Explanation for "su root sh -c": there are 2 flavors of "su" in circulation
// on Android. The default Android su has the following syntax to run a command
// as root:
// su root 'command'
// and 'command' is exec'd not passed to a shell, so if shell interpretation is
// wanted, one needs to do:
// su root sh -c 'command'
// Besides that default Android 'su' command, some Android devices use a different
// su with a command-line interface closer to the familiar util-linux su found
// on Linux distributions. Fortunately, both the util-linux su and the one
// in https://github.com/topjohnwu/Magisk seem to be happy with the above
// `su root sh -c 'command'` command line syntax.
char tmp[256];
sprintf( tmp, "su root sh -c 'echo \"%s\" > %s%s'", val, BasePath, path );
return system( tmp ) == 0;
}
#else
static bool TraceWrite( const char* path, size_t psz, const char* val, size_t vsz )
{
char tmp[256];
memcpy( tmp, BasePath, sizeof( BasePath ) - 1 );
memcpy( tmp + sizeof( BasePath ) - 1, path, psz );
int fd = open( tmp, O_WRONLY );
if( fd < 0 ) return false;
for(;;)
{
ssize_t cnt = write( fd, val, vsz );
if( cnt == (ssize_t)vsz )
{
close( fd );
return true;
}
if( cnt < 0 )
{
close( fd );
return false;
}
vsz -= cnt;
val += cnt;
}
}
#endif
#ifdef __ANDROID__
void SysTraceInjectPayload()
{
int pipefd[2];
if( pipe( pipefd ) == 0 )
{
const auto pid = fork();
if( pid == 0 )
{
// child
close( pipefd[1] );
if( dup2( pipefd[0], STDIN_FILENO ) >= 0 )
{
close( pipefd[0] );
execlp( "su", "su", "root", "sh", "-c", "cat > /data/tracy_systrace", (char*)nullptr );
exit( 1 );
}
}
else if( pid > 0 )
{
// parent
close( pipefd[0] );
#ifdef __aarch64__
write( pipefd[1], tracy_systrace_aarch64_data, tracy_systrace_aarch64_size );
#else
write( pipefd[1], tracy_systrace_armv7_data, tracy_systrace_armv7_size );
#endif
close( pipefd[1] );
waitpid( pid, nullptr, 0 );
system( "su root sh -c 'chmod 700 /data/tracy_systrace'" );
}
}
}
#endif
bool SysTraceStart( int64_t& samplingPeriod )
{
#ifndef CLOCK_MONOTONIC_RAW
return false;
#endif
if( !TraceWrite( TracingOn, sizeof( TracingOn ), "0", 2 ) ) return false;
if( !TraceWrite( CurrentTracer, sizeof( CurrentTracer ), "nop", 4 ) ) return false;
TraceWrite( TraceOptions, sizeof( TraceOptions ), "norecord-cmd", 13 );
TraceWrite( TraceOptions, sizeof( TraceOptions ), "norecord-tgid", 14 );
TraceWrite( TraceOptions, sizeof( TraceOptions ), "noirq-info", 11 );
TraceWrite( TraceOptions, sizeof( TraceOptions ), "noannotate", 11 );
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
if( !TraceWrite( TraceClock, sizeof( TraceClock ), "x86-tsc", 8 ) ) return false;
#else
if( !TraceWrite( TraceClock, sizeof( TraceClock ), "mono_raw", 9 ) ) return false;
#endif
if( !TraceWrite( SchedSwitch, sizeof( SchedSwitch ), "1", 2 ) ) return false;
if( !TraceWrite( SchedWakeup, sizeof( SchedWakeup ), "1", 2 ) ) return false;
if( !TraceWrite( BufferSizeKb, sizeof( BufferSizeKb ), "4096", 5 ) ) return false;
#if defined __ANDROID__ && ( defined __aarch64__ || defined __ARM_ARCH )
SysTraceInjectPayload();
#endif
if( !TraceWrite( TracingOn, sizeof( TracingOn ), "1", 2 ) ) return false;
traceActive.store( true, std::memory_order_relaxed );
SetupSampling( samplingPeriod );
return true;
}
void SysTraceStop()
{
TraceWrite( TracingOn, sizeof( TracingOn ), "0", 2 );
traceActive.store( false, std::memory_order_relaxed );
if( s_threadSampling )
{
s_threadSampling->~Thread();
tracy_free( s_threadSampling );
}
}
static uint64_t ReadNumber( const char*& data )
{
auto ptr = data;
assert( *ptr >= '0' && *ptr <= '9' );
uint64_t val = 0;
for(;;)
{
uint64_t q;
memcpy( &q, ptr, 8 );
for( int i=0; i<8; i++ )
{
const uint64_t v = ( q & 0xFF ) - '0';
if( v > 9 )
{
data = ptr + i;
return val;
}
val = val * 10 + v;
q >>= 8;
}
ptr += 8;
}
}
static uint8_t ReadState( char state )
{
switch( state )
{
case 'D': return 101;
case 'I': return 102;
case 'R': return 103;
case 'S': return 104;
case 'T': return 105;
case 't': return 106;
case 'W': return 107;
case 'X': return 108;
case 'Z': return 109;
default: return 100;
}
}
#if defined __ANDROID__ && defined __ANDROID_API__ && __ANDROID_API__ < 18
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
ssize_t getdelim(char **buf, size_t *bufsiz, int delimiter, FILE *fp)
{
char *ptr, *eptr;
if (*buf == NULL || *bufsiz == 0) {
*bufsiz = BUFSIZ;
if ((*buf = (char*)malloc(*bufsiz)) == NULL)
return -1;
}
for (ptr = *buf, eptr = *buf + *bufsiz;;) {
int c = fgetc(fp);
if (c == -1) {
if (feof(fp))
return ptr == *buf ? -1 : ptr - *buf;
else
return -1;
}
*ptr++ = c;
if (c == delimiter) {
*ptr = '\0';
return ptr - *buf;
}
if (ptr + 2 >= eptr) {
char *nbuf;
size_t nbufsiz = *bufsiz * 2;
ssize_t d = ptr - *buf;
if ((nbuf = (char*)realloc(*buf, nbufsiz)) == NULL)
return -1;
*buf = nbuf;
*bufsiz = nbufsiz;
eptr = nbuf + nbufsiz;
ptr = nbuf + d;
}
}
}
ssize_t getline(char **buf, size_t *bufsiz, FILE *fp)
{
return getdelim(buf, bufsiz, '\n', fp);
}
#endif
#ifdef __AVX2__
static inline void AdvanceTo( const char*& line, char match )
{
__m256i m = _mm256_set1_epi8( match );
auto ptr = line;
for(;;)
{
__m256i l = _mm256_loadu_si256( (const __m256i*)ptr );
__m256i c = _mm256_cmpeq_epi8( l, m );
auto b = uint32_t( _mm256_movemask_epi8( c ) );
if( b != 0 )
{
line = ptr + __builtin_ctz( b );
return;
}
ptr += 32;
}
}
#else
static inline void AdvanceTo( const char*& line, char match )
{
auto ptr = line;
for(;;)
{
uint64_t l;
memcpy( &l, ptr, 8 );
for( int i=0; i<8; i++ )
{
if( ( l & 0xFF ) == uint8_t( match ) )
{
line = ptr + i;
return;
}
l >>= 8;
}
ptr += 8;
}
}
#endif
#ifdef __AVX2__
static inline void AdvanceToNot( const char*& line, char match )
{
__m256i m = _mm256_set1_epi8( match );
auto ptr = line;
for(;;)
{
__m256i l = _mm256_loadu_si256( (const __m256i*)ptr );
__m256i c = _mm256_cmpeq_epi8( l, m );
auto b = ~uint32_t( _mm256_movemask_epi8( c ) );
if( b != 0 )
{
line = ptr + __builtin_ctz( b );
return;
}
ptr += 32;
}
}
#else
static inline void AdvanceToNot( const char*& line, char match )
{
auto ptr = line;
for(;;)
{
uint64_t l;
memcpy( &l, ptr, 8 );
for( int i=0; i<8; i++ )
{
if( ( l & 0xFF ) != uint8_t( match ) )
{
line = ptr + i;
return;
}
l >>= 8;
}
ptr += 8;
}
}
#endif
#ifdef __AVX2__
template<int S>
static inline void AdvanceTo( const char*& line, const char* match )
{
auto first = uint8_t( match[0] );
__m256i m = _mm256_set1_epi8( first );
auto ptr = line;
for(;;)
{
__m256i l = _mm256_loadu_si256( (const __m256i*)ptr );
__m256i c = _mm256_cmpeq_epi8( l, m );
auto b = uint32_t( _mm256_movemask_epi8( c ) );
while( b != 0 )
{
auto bit = __builtin_ctz( b );
auto test = ptr + bit;
if( memcmp( test, match, S ) == 0 )
{
line = test;
return;
}
b ^= ( 1u << bit );
}
ptr += 32;
}
}
#else
template<int S>
static inline void AdvanceTo( const char*& line, const char* match )
{
auto first = uint8_t( match[0] );
auto ptr = line;
for(;;)
{
uint64_t l;
memcpy( &l, ptr, 8 );
for( int i=0; i<8; i++ )
{
if( ( l & 0xFF ) == first )
{
if( memcmp( ptr + i, match, S ) == 0 )
{
line = ptr + i;
return;
}
}
l >>= 8;
}
ptr += 8;
}
}
#endif
static void HandleTraceLine( const char* line )
{
line += 23;
AdvanceTo( line, '[' );
line++;
const auto cpu = (uint8_t)ReadNumber( line );
line++; // ']'
AdvanceToNot( line, ' ' );
#if defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
const auto time = ReadNumber( line );
#else
const auto ts = ReadNumber( line );
line++; // '.'
const auto tus = ReadNumber( line );
const auto time = ts * 1000000000ll + tus * 1000ll;
#endif
line += 2; // ': '
if( memcmp( line, "sched_switch", 12 ) == 0 )
{
line += 14;
AdvanceTo<8>( line, "prev_pid" );
line += 9;
const auto oldPid = uint32_t( ReadNumber( line ) );
line++;
AdvanceTo<10>( line, "prev_state" );
line += 11;
const auto oldState = (uint8_t)ReadState( *line );
line += 5;
AdvanceTo<8>( line, "next_pid" );
line += 9;
const auto newPid = uint32_t( ReadNumber( line ) );
uint8_t reason = 100;
TracyLfqPrepare( QueueType::ContextSwitch );
MemWrite( &item->contextSwitch.time, time );
MemWrite( &item->contextSwitch.oldThread, oldPid );
MemWrite( &item->contextSwitch.newThread, newPid );
MemWrite( &item->contextSwitch.cpu, cpu );
MemWrite( &item->contextSwitch.reason, reason );
MemWrite( &item->contextSwitch.state, oldState );
TracyLfqCommit;
}
else if( memcmp( line, "sched_wakeup", 12 ) == 0 )
{
line += 14;
AdvanceTo<4>( line, "pid=" );
line += 4;
const auto pid = uint32_t( ReadNumber( line ) );
TracyLfqPrepare( QueueType::ThreadWakeup );
MemWrite( &item->threadWakeup.time, time );
MemWrite( &item->threadWakeup.thread, pid );
TracyLfqCommit;
}
}
#ifdef __ANDROID__
static void ProcessTraceLines( int fd )
{
// Linux pipe buffer is 64KB, additional 1KB is for unfinished lines
char* buf = (char*)tracy_malloc( (64+1)*1024 );
char* line = buf;
for(;;)
{
if( !traceActive.load( std::memory_order_relaxed ) ) break;
const auto rd = read( fd, line, 64*1024 );
if( rd <= 0 ) break;
#ifdef TRACY_ON_DEMAND
if( !GetProfiler().IsConnected() )
{
if( rd < 64*1024 )
{
assert( line[rd-1] == '\n' );
line = buf;
std::this_thread::sleep_for( std::chrono::milliseconds( 10 ) );
}
else
{
const auto end = line + rd;
line = end - 1;
while( line > buf && *line != '\n' ) line--;
if( line > buf )
{
line++;
const auto lsz = end - line;
memmove( buf, line, lsz );
line = buf + lsz;
}
}
continue;
}
#endif
const auto end = line + rd;
line = buf;
for(;;)
{
auto next = (char*)memchr( line, '\n', end - line );
if( !next )
{
const auto lsz = end - line;
memmove( buf, line, lsz );
line = buf + lsz;
break;
}
HandleTraceLine( line );
line = ++next;
}
if( rd < 64*1024 )
{
std::this_thread::sleep_for( std::chrono::milliseconds( 10 ) );
}
}
tracy_free( buf );
}
void SysTraceWorker( void* ptr )
{
ThreadExitHandler threadExitHandler;
SetThreadName( "Tracy SysTrace" );
int pipefd[2];
if( pipe( pipefd ) == 0 )
{
const auto pid = fork();
if( pid == 0 )
{
// child
close( pipefd[0] );
dup2( open( "/dev/null", O_WRONLY ), STDERR_FILENO );
if( dup2( pipefd[1], STDOUT_FILENO ) >= 0 )
{
close( pipefd[1] );
sched_param sp = { 4 };
pthread_setschedparam( pthread_self(), SCHED_FIFO, &sp );
#if defined __ANDROID__ && ( defined __aarch64__ || defined __ARM_ARCH )
execlp( "su", "su", "root", "sh", "-c", "/data/tracy_systrace", (char*)nullptr );
#endif
execlp( "su", "su", "root", "sh", "-c", "cat /sys/kernel/debug/tracing/trace_pipe", (char*)nullptr );
exit( 1 );
}
}
else if( pid > 0 )
{
// parent
close( pipefd[1] );
sched_param sp = { 5 };
pthread_setschedparam( pthread_self(), SCHED_FIFO, &sp );
ProcessTraceLines( pipefd[0] );
close( pipefd[0] );
waitpid( pid, nullptr, 0 );
}
}
}
#else
static void ProcessTraceLines( int fd )
{
// 32 bytes buffer space for wide unbound reads
char* buf = (char*)tracy_malloc( 64*1024 + 32 );
struct pollfd pfd;
pfd.fd = fd;
pfd.events = POLLIN | POLLERR;
for(;;)
{
while( poll( &pfd, 1, 0 ) <= 0 )
{
if( !traceActive.load( std::memory_order_relaxed ) ) break;
std::this_thread::sleep_for( std::chrono::milliseconds( 10 ) );
}
const auto rd = read( fd, buf, 64*1024 );
if( rd <= 0 ) break;
#ifdef TRACY_ON_DEMAND
if( !GetProfiler().IsConnected() ) continue;
#endif
auto line = buf;
const auto end = buf + rd;
for(;;)
{
auto next = (char*)memchr( line, '\n', end - line );
if( !next ) break;
HandleTraceLine( line );
line = ++next;
}
}
tracy_free( buf );
}
void SysTraceWorker( void* ptr )
{
ThreadExitHandler threadExitHandler;
SetThreadName( "Tracy SysTrace" );
char tmp[256];
memcpy( tmp, BasePath, sizeof( BasePath ) - 1 );
memcpy( tmp + sizeof( BasePath ) - 1, TracePipe, sizeof( TracePipe ) );
int fd = open( tmp, O_RDONLY );
if( fd < 0 ) return;
sched_param sp = { 5 };
pthread_setschedparam( pthread_self(), SCHED_FIFO, &sp );
ProcessTraceLines( fd );
close( fd );
}
#endif
void SysTraceSendExternalName( uint64_t thread )
{
FILE* f;
char fn[256];
sprintf( fn, "/proc/%" PRIu64 "/comm", thread );
f = fopen( fn, "rb" );
if( f )
{
char buf[256];
const auto sz = fread( buf, 1, 256, f );
if( sz > 0 && buf[sz-1] == '\n' ) buf[sz-1] = '\0';
GetProfiler().SendString( thread, buf, QueueType::ExternalThreadName );
fclose( f );
}
else
{
GetProfiler().SendString( thread, "???", 3, QueueType::ExternalThreadName );
}
sprintf( fn, "/proc/%" PRIu64 "/status", thread );
f = fopen( fn, "rb" );
if( f )
{
int pid = -1;
size_t lsz = 1024;
auto line = (char*)tracy_malloc( lsz );
for(;;)
{
auto rd = getline( &line, &lsz, f );
if( rd <= 0 ) break;
if( memcmp( "Tgid:\t", line, 6 ) == 0 )
{
pid = atoi( line + 6 );
break;
}
}
tracy_free_fast( line );
fclose( f );
if( pid >= 0 )
{
{
uint64_t _pid = pid;
TracyLfqPrepare( QueueType::TidToPid );
MemWrite( &item->tidToPid.tid, thread );
MemWrite( &item->tidToPid.pid, _pid );
TracyLfqCommit;
}
sprintf( fn, "/proc/%i/comm", pid );
f = fopen( fn, "rb" );
if( f )
{
char buf[256];
const auto sz = fread( buf, 1, 256, f );
if( sz > 0 && buf[sz-1] == '\n' ) buf[sz-1] = '\0';
GetProfiler().SendString( thread, buf, QueueType::ExternalName );
fclose( f );
return;
}
}
}
GetProfiler().SendString( thread, "???", 3, QueueType::ExternalName );
}
}
# endif
#endif
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