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Add symex-backtrace #3468

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Merged
merged 1 commit into from
Nov 27, 2018
Merged

Add symex-backtrace #3468

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23 changes: 23 additions & 0 deletions src/goto-symex/goto_symex_state.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -774,3 +774,26 @@ void goto_symex_statet::get_l1_name(exprt &expr) const
Forall_operands(it, expr)
get_l1_name(*it);
}

/// Dumps the current state of symex, printing the function name and location
/// number for each stack frame in the currently active thread.
/// This is for use from the debugger or in debug code; please don't delete it
/// just because it isn't called at present.
/// \param out: stream to write to
void goto_symex_statet::print_backtrace(std::ostream &out) const
{
out << source.pc->function << " " << source.pc->location_number << "\n";

for(auto stackit = threads[source.thread_nr].call_stack.rbegin(),
stackend = threads[source.thread_nr].call_stack.rend();
stackit != stackend;
++stackit)
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⛏️ I would suggest the slighly nicer:

for(const auto &frame : make_range(
    threads[source.thread_nr].call_stack.rbegin(),
    threads[source.thread_nr].call_stack.rend()))

{
const auto &frame = *stackit;
if(frame.calling_location.is_set)
{
out << frame.calling_location.pc->function << " "
<< frame.calling_location.pc->location_number << "\n";
}
}
}
2 changes: 2 additions & 0 deletions src/goto-symex/goto_symex_state.h
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Expand Up @@ -230,6 +230,8 @@ class goto_symex_statet final
void pop_frame() { call_stack().pop_back(); }
const framet &previous_frame() { return *(--(--call_stack().end())); }

void print_backtrace(std::ostream &) const;

// threads
unsigned atomic_section_id;
typedef std::pair<unsigned, std::list<guardt> > a_s_r_entryt;
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