51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#include "ConseqEquivFilter.hpp"
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using namespace std;
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ConseqEquivFilter::ConseqEquivFilter(bool enable): SimpleDwarfFilter(enable) {}
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static bool equiv_reg(
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const SimpleDwarf::DwRegister& r1,
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const SimpleDwarf::DwRegister& r2)
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{
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return r1.type == r2.type
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&& r1.offset == r2.offset
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&& r1.reg == r2.reg;
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}
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static bool equiv_row(
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const SimpleDwarf::DwRow& r1,
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const SimpleDwarf::DwRow& r2)
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{
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return r1.ip == r2.ip
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&& equiv_reg(r1.cfa, r2.cfa)
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&& equiv_reg(r1.rbp, r2.rbp)
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&& equiv_reg(r1.rbx, r2.rbx)
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&& equiv_reg(r1.ra, r2.ra);
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}
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SimpleDwarf ConseqEquivFilter::do_apply(const SimpleDwarf& dw) const {
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SimpleDwarf out;
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for(const auto& fde: dw.fde_list) {
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out.fde_list.push_back(SimpleDwarf::Fde());
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SimpleDwarf::Fde& cur_fde = out.fde_list.back();
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cur_fde.fde_offset = fde.fde_offset;
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cur_fde.beg_ip = fde.beg_ip;
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cur_fde.end_ip = fde.end_ip;
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if(fde.rows.empty())
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continue;
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cur_fde.rows.push_back(fde.rows.front());
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for(size_t pos=1; pos < fde.rows.size(); ++pos) {
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const auto& row = fde.rows[pos];
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if(!equiv_row(row, cur_fde.rows.back())) {
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cur_fde.rows.push_back(row);
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}
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}
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}
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return out;
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}
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