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Test whole call stack for non-canonical pointers.

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This commit is contained in:
Bartosz Taudul 2020-10-06 18:27:14 +02:00
parent f364c2cef3
commit d75503047c
1 changed files with 16 additions and 5 deletions
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21
client/TracySysTrace.cpp
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@ -727,11 +727,22 @@ static void SetupSampling( int64_t& samplingPeriod )
auto trace = (uint64_t*)tracy_malloc( ( 1 + cnt ) * sizeof( uint64_t ) );
s_ring[i].Read( trace+1, offset, sizeof( uint64_t ) * cnt );
// remove non-canonical pointer at the end
const auto test = (int64_t)trace[cnt];
const auto m1 = test >> 63;
const auto m2 = test >> 47;
if( m1 != m2 ) cnt--;
// 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;
}
// skip kernel frames
uint64_t j;