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class Tracer
MY_FILE_NAME_PATTERN = /^tracer\.(rb)?/
Threads = Hash.new
Sources = Hash.new
EVENT_SYMBOL = {
"line" => "-",
"call" => ">",
"return" => "<",
"class" => "C",
"end" => "E"}
def on
set_trace_func proc{|event, file, line, id, binding|
trace_func event, file, line, id, binding
}
print "Trace on\n"
end
def off
set_trace_func nil
print "Trace off\n"
end
def get_thread_no
unless no = Threads[Thread.current.id]
Threads[Thread.current.id] = no = Threads.size
end
no
end
def get_line(file, line)
unless list = Sources[file]
f =open(file)
begin
Sources[file] = list = f.readlines
ensure
f.close
end
end
list[line - 1]
end
def trace_func(event, file, line, id, binding)
return if File.basename(file) =~ MY_FILE_NAME_PATTERN
Thread.critical = TRUE
printf("#%d:%s:%d:%s: %s",
get_thread_no,
file,
line,
EVENT_SYMBOL[event],
get_line(file, line))
Thread.critical = FALSE
end
Single = new
def Tracer.on
Single.on
end
def Tracer.off
Single.off
end
end
if File.basename($0) =~ Tracer::MY_FILE_NAME_PATTERN
$0 = ARGV.shift
Tracer.on
load $0
else
Tracer.on
end
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