Ruby 版的 PinkTrace 示例 pink-fork-linux.rb

boy11-2

1. #!/usr/bin/env ruby
   
2. # coding: utf-8
   
3. # vim: set sw=2 sts=2 et fenc=utf-8 :
   
4. 
   
5. =begin
   
6. An example demonstrating the tracing fork
   
7. =end
   
8. 
   
9. require 'PinkTrace'
   
10. 
    
11. pid = fork do
    
12.   # Prepare for tracing.
    
13.   PinkTrace::Trace.me
    
14.   # Stop to give the parent a chance to resume execution after setting options.
    
15.   Process.kill 'STOP', Process.pid
    
16. 
    
17.   puts "hello world"
    
18. end
    
19. 
    
20. Process.wait # sets $?
    
21. event = PinkTrace::Event.decide # uses $?.status by default
    
22. unless event == PinkTrace::Event::EVENT_STOP
    
23.   puts "wtf?"
    
24.   PinkTrace::Trace.kill pid
    
25.   exit 1
    
26. end
    
27. 
    
28. # Set tracing options
    
29. PinkTrace::Trace.setup pid
    
30. # Let the child resume its execution.
    
31. PinkTrace::Trace.resume pid
    
32. # Wait for the child to exit.
    
33. Process.wait

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