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Implement checking if any TID is within current process.

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Bartosz Taudul 2021-12-21 13:52:52 +01:00
parent b8d7824a4f
commit 4a89a30556
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1 changed files with 25 additions and 0 deletions
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25
client/TracySysTrace.cpp
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@ -652,6 +652,31 @@ static int s_ctxBufferIdx = 0;
static constexpr size_t RingBufSize = 256*1024; static constexpr size_t RingBufSize = 256*1024;
static RingBuffer<RingBufSize>* s_ring = nullptr; static RingBuffer<RingBufSize>* s_ring = nullptr;
static const int ThreadHashSize = 4 * 1024;
static uint32_t s_threadHash[ThreadHashSize] = {};
static bool CurrentProcOwnsThread( uint32_t tid )
{
const auto hash = tid & ( ThreadHashSize-1 );
const auto hv = s_threadHash[hash];
if( hv == tid ) return true;
if( hv == -tid ) return false;
char path[256];
sprintf( path, "/proc/self/task/%d", tid );
struct stat st;
if( stat( path, &st ) == 0 )
{
s_threadHash[hash] = tid;
return true;
}
else
{
s_threadHash[hash] = -tid;
return false;
}
}
static int perf_event_open( struct perf_event_attr* hw_event, pid_t pid, int cpu, int group_fd, unsigned long flags ) 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 ); return syscall( __NR_perf_event_open, hw_event, pid, cpu, group_fd, flags );