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#include "libunwind_cursor.h"
namespace NYT::NBacktrace {
////////////////////////////////////////////////////////////////////////////////
TLibunwindCursor::TLibunwindCursor()
{
if (unw_getcontext(&Context_) != 0) {
Finished_ = true;
return;
}
Initialize();
}
TLibunwindCursor::TLibunwindCursor(const unw_context_t& context)
: Context_(context)
{
Initialize();
}
void TLibunwindCursor::Initialize()
{
if (unw_init_local(&Cursor_, &Context_) != 0) {
Finished_ = true;
return;
}
ReadCurrentIP();
}
bool TLibunwindCursor::IsFinished() const
{
return Finished_;
}
const void* TLibunwindCursor::GetCurrentIP() const
{
return CurrentIP_;
}
void TLibunwindCursor::MoveNext()
{
if (Finished_) {
return;
}
if (unw_step(&Cursor_) <= 0) {
Finished_ = true;
return;
}
ReadCurrentIP();
}
void TLibunwindCursor::ReadCurrentIP()
{
unw_word_t ip = 0;
if (unw_get_reg(&Cursor_, UNW_REG_IP, &ip) < 0) {
Finished_ = true;
return;
}
CurrentIP_ = reinterpret_cast<const void*>(ip);
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT::NBacktrace
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