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New Relic's Open-Source Elixir Agent
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lib/new_relic/util/error.ex
defmodule NewRelic.Util.Error do
# Helper functions for normalizing and formatting errors
@moduledoc false
def normalize(kind, exception, stacktrace, initial_call \\ nil)
def normalize(kind, exception, stacktrace, initial_call) do
normalized_error = Exception.normalize(kind, exception, stacktrace)
exception_type = format_type(kind, normalized_error)
exception_reason = format_reason(kind, normalized_error)
exception_stacktrace = format_stacktrace(stacktrace, initial_call)
{exception_type, exception_reason, exception_stacktrace}
end
defp format_type(:error, %ErlangError{original: {_reason, {module, function, args}}}),
do: Exception.format_mfa(module, function, length(args))
defp format_type(_, %{__exception__: true, __struct__: struct}), do: inspect(struct)
defp format_type(:exit, _reason), do: "EXIT"
def format_reason(:error, %ErlangError{original: {reason, {module, function, args}}}),
do: "(" <> Exception.format_mfa(module, function, length(args)) <> ") " <> inspect(reason)
def format_reason(:error, error),
do:
:error
|> Exception.format_banner(error)
|> String.replace("** ", "")
def format_reason(:exit, {reason, {module, function, args}}),
do: "(" <> Exception.format_mfa(module, function, length(args)) <> ") " <> inspect(reason)
def format_reason(:exit, %{__exception__: true} = error), do: format_reason(:error, error)
def format_reason(:exit, reason), do: inspect(reason)
def format_stacktrace(stacktrace, initial_call),
do:
maybe_remove_args_from_stacktrace(stacktrace)
|> List.wrap()
|> prepend_initial_call(initial_call)
|> Enum.map(fn
line when is_binary(line) -> line
entry when is_tuple(entry) -> Exception.format_stacktrace_entry(entry)
end)
defp prepend_initial_call(stacktrace, {mod, fun, args}) do
if NewRelic.Config.feature?(:stacktrace_argument_collection) do
stacktrace ++ [{mod, fun, args, []}]
else
stacktrace ++ [{mod, fun, ["DISABLED (arity: #{length(args)})"], []}]
end
end
defp prepend_initial_call(stacktrace, _) do
stacktrace
end
defp maybe_remove_args_from_stacktrace(stacktrace) do
if NewRelic.Config.feature?(:stacktrace_argument_collection) do
stacktrace
else
remove_args_from_stacktrace(stacktrace)
end
end
defp remove_args_from_stacktrace([{mod, fun, [_ | _] = args, info} | rest]),
do: [{mod, fun, ["DISABLED (arity: #{length(args)})"], info} | rest]
defp remove_args_from_stacktrace(stacktrace) when is_list(stacktrace),
do: stacktrace
end