39 lines
905 B
Text
39 lines
905 B
Text
meta def get_file (fn : name) : vm format :=
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do {
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d ← vm.get_decl fn,
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some n ← return (vm_decl.olean d) | failure,
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return (to_fmt n)
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}
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<|>
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return (to_fmt "<curr file>")
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meta def pos_info (fn : name) : vm format :=
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do {
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d ← vm.get_decl fn,
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some (line, col) ← return (vm_decl.pos d) | failure,
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file ← get_file fn,
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return (file ++ ":" ++ line ++ ":" ++ col)
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}
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<|>
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return (to_fmt "<position not available>")
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meta def basic_monitor : vm_monitor nat :=
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{ init := 1000,
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step := λ sz, do
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csz ← vm.call_stack_size,
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if sz = csz then return sz
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else do
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fn ← vm.curr_fn,
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pos ← pos_info fn,
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vm.trace (to_fmt "[" ++ csz ++ "]: " ++ to_fmt fn ++ " @ " ++ pos),
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return csz }
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run_command vm_monitor.register `basic_monitor
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set_option debugger true
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def f : nat → nat
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| 0 := 0
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| (a+1) := f a
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vm_eval trace "a" (f 4)
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