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# -*- coding: us-ascii -*-
# frozen_string_literal: false
require 'test/unit'
require 'tempfile'
if Process.euid == 0
ok = true
elsif (sudo = ENV["SUDO"]) and !sudo.empty? and (`#{sudo} echo ok` rescue false)
ok = true
else
ok = false
end
if ok
case RUBY_PLATFORM
when /darwin/i
begin
require 'pty'
rescue LoadError
ok = false
end
end
end
ok &= (`dtrace -V` rescue false)
module DTrace
class TestCase < Test::Unit::TestCase
INCLUDE = File.expand_path('..', File.dirname(__FILE__))
case RUBY_PLATFORM
when /solaris/i
# increase bufsize to 8m (default 4m on Solaris)
DTRACE_CMD = %w[dtrace -b 8m]
when /darwin/i
READ_PROBES = proc do |cmd|
PTY.spawn(*cmd) do |io, _|
break io.readlines
end
end
end
DTRACE_CMD ||= %w[dtrace]
READ_PROBES ||= proc do |cmd|
IO.popen(cmd, err: [:child, :out], &:readlines)
end
case rubybin = EnvUtil.rubybin
when /\/ruby-runner#{Regexp.quote(RbConfig::CONFIG["EXEEXT"])}\z/
RUBYBIN = File.dirname(rubybin)+"/miniruby#{RbConfig::CONFIG["EXEEXT"]}"
else
RUBYBIN = rubybin
end
def trap_probe d_program, ruby_program
d = Tempfile.new(%w'probe .d')
d.write d_program
d.flush
rb = Tempfile.new(%w'probed .rb')
rb.write ruby_program
rb.flush
d_path = d.path
rb_path = rb.path
cmd = [*DTRACE_CMD, "-q", "-s", d_path, "-c", "#{RUBYBIN} -I#{INCLUDE} #{rb_path}"]
if sudo = @@sudo
[RbConfig::CONFIG["LIBPATHENV"], "RUBY", "RUBYOPT"].each do |name|
if name and val = ENV[name]
cmd.unshift("#{name}=#{val}")
end
end
cmd.unshift(sudo)
end
probes = READ_PROBES.(cmd)
d.close(true)
rb.close(true)
yield(d_path, rb_path, probes)
end
end
end if ok
if ok
DTrace::TestCase.class_variable_set(:@@sudo, sudo)
end
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