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Fix IEx.Helpers.process_info/1 heap and stack memory calculation #15628

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Merged
josevalim merged 1 commit into from
Jul 17, 2026
Merged

Fix IEx.Helpers.process_info/1 heap and stack memory calculation #15628

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15 changes: 10 additions & 5 deletions lib/iex/lib/iex/helpers.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -893,15 +893,17 @@ defmodule IEx.Helpers do
def process_info(pid) do
with pid when is_pid(pid) <- GenServer.whereis(pid),
info when is_list(info) <-
:erpc.call(node(pid), :erlang, :process_info, [pid, @process_info_keys]) do
:erpc.call(node(pid), :erlang, :process_info, [pid, @process_info_keys]),
word_size when is_integer(word_size) <-
:erpc.call(node(pid), :erlang, :system_info, [:wordsize]) do
info = Map.new(info)

IO.puts(IEx.color(:eval_result, ["\n# Process ", inspect(pid)]))

print_process_overview(info)
print_process_links(info[:links])
print_process_monitors(info[:monitors])
print_process_memory(info)
print_process_memory(info, word_size)
print_process_stacktrace(info[:current_stacktrace])
else
_ ->
Expand Down Expand Up @@ -957,11 +959,14 @@ defmodule IEx.Helpers do
end
end

defp print_process_memory(info) do
defp print_process_memory(info, word_size) do
print_pane("Memory")

for key <- [:memory, :total_heap_size, :heap_size, :stack_size] do
print_entry(@process_info_label_mapping[key], format_bytes(info[key]))
print_entry(@process_info_label_mapping[:memory], format_bytes(info[:memory]))

# InfoTuple's word-sized items
for key <- [:total_heap_size, :heap_size, :stack_size] do
print_entry(@process_info_label_mapping[key], format_bytes(info[key] * word_size))
end
end

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