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#include <gtest/gtest.h>
#include <gmock/gmock.h>
#include <library/cpp/yt/memory/safe_memory_reader.h>
#include <library/cpp/yt/backtrace/cursors/frame_pointer/frame_pointer_cursor.h>
#include <library/cpp/yt/backtrace/cursors/interop/interop.h>
#include <util/system/compiler.h>
#include <contrib/libs/libunwind/include/libunwind.h>
namespace NYT::NBacktrace {
namespace {
////////////////////////////////////////////////////////////////////////////////
template <int Depth, class TFn>
Y_NO_INLINE void RunInDeepStack(TFn cb)
{
if constexpr (Depth == 0) {
cb();
} else {
std::vector<int> touchMem;
touchMem.push_back(0);
RunInDeepStack<Depth-1>(cb);
DoNotOptimizeAway(touchMem);
}
}
TEST(TFramePointerCursor, FramePointerCursor)
{
std::vector<const void*> backtrace;
RunInDeepStack<64>([&] {
unw_context_t unwContext;
ASSERT_TRUE(unw_getcontext(&unwContext) == 0);
unw_cursor_t unwCursor;
ASSERT_TRUE(unw_init_local(&unwCursor, &unwContext) == 0);
TSafeMemoryReader reader;
auto fpCursorContext = NBacktrace::FramePointerCursorContextFromLibunwindCursor(unwCursor);
NBacktrace::TFramePointerCursor fpCursor(&reader, fpCursorContext);
while (!fpCursor.IsFinished()) {
backtrace.push_back(fpCursor.GetCurrentIP());
fpCursor.MoveNext();
}
});
ASSERT_THAT(backtrace, testing::SizeIs(testing::Ge(64u)));
}
////////////////////////////////////////////////////////////////////////////////
} // namespace
} // namespace NYT::NBacktrace
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