[#57574] [ruby-trunk - Feature #8976][Open] file-scope freeze_string directive — "akr (Akira Tanaka)" <akr@...>

70 messages 2013/10/02

[#57579] [ruby-trunk - Feature #8977][Open] String#frozen that takes advantage of the deduping — "sam.saffron (Sam Saffron)" <sam.saffron@...>

25 messages 2013/10/02

[#57679] [ruby-trunk - Feature #8987][Open] map/collect extension which handles arguments — "sowieso (So Wieso)" <sowieso@...>

16 messages 2013/10/05

[#57705] [ruby-trunk - Feature #8992][Open] Use String#freeze and compiler tricks to replace "str"f suffix — "headius (Charles Nutter)" <headius@...>

43 messages 2013/10/07

[#57727] [ruby-trunk - Feature #8998][Open] string keys for hash literals should use fstrings — "normalperson (Eric Wong)" <normalperson@...>

17 messages 2013/10/08

[#57771] [ruby-trunk - Bug #9008][Open] TestProcess#test_clock_getres_constants and TestProcess#test_clock_gettime_constants fails on ARM — "vo.x (Vit Ondruch)" <v.ondruch@...>

15 messages 2013/10/09

[#57888] [ruby-trunk - Feature #9025][Open] Clarify the error message when calling a method with the wrong number of arguments — Nerian (Gonzalo Rodríguez) <siotopo@...>

11 messages 2013/10/15

[#57993] [ruby-trunk - Feature #9047][Open] Alternate hash key syntax for symbols — "jamonholmgren (Jamon Holmgren)" <jamon@...>

13 messages 2013/10/23

[#58007] [ruby-trunk - Feature #9049][Open] Shorthands (a:b, *) for inclusive indexing — "mohawkjohn (John Woods)" <john.o.woods@...>

25 messages 2013/10/24

[#58033] [ruby-trunk - Bug #9053][Open] SSL Issue with Ruby 2.0.0 — "tisba (Sebastian Cohnen)" <ruby-lang@...>

16 messages 2013/10/25

[#58080] [ruby-trunk - Feature #9064][Open] Add support for packages, like in Java — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

23 messages 2013/10/30

[ruby-core:57792] [ruby-trunk - Bug #9009][Open] Wrong binding when tracing c-calls

From: "yekka (Nikolay Bozhenov)" <Nikolay.Bozhenov@...>
Date: 2013-10-09 18:21:15 UTC
List: ruby-core #57792
Issue #9009 has been reported by yekka (Nikolay Bozhenov).

----------------------------------------
Bug #9009: Wrong binding when tracing c-calls
https://bugs.ruby-lang.org/issues/9009

Author: yekka (Nikolay Bozhenov)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.1.0dev (2013-10-04 trunk 43141) [x86_64-linux]
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


When I use set_trace_func to trace ruby code, I get a wrong binding in
case of c-calls. In this case binding.eval("self") is not the receiver
of the call. Whereas in case of ruby-calls binding.eval("self") yields
the receiver of the call.
The underlying problem is that c-calls aren't pushed onto the frame stack.
It seems that currently there is no way to find out the receiver of c-call
inside tracing function.

Example of code:

$ cat test.rb
class IO
    def some_method
    end
end

puts "true receiver is #{$stdout}\n\n"

set_trace_func proc { |event, file, line, id, binding, classname|
    if event == "call" or event == "c-call"
        puts "#{event} #{id}:"
        puts "\tapparent receiver = #{binding.eval("self")}"
        puts "\tbacktrace:"
        caller.each { |l| puts "\t\t#{l}" }
        puts
    end
}

$stdout.write ""      # c-call
$stdout.some_method   # ruby-call


Execution:
  
$ ruby test.rb 
true receiver is #<IO:0x00000000bed2a0>

c-call write:
        apparent receiver = main
        backtrace:
                test.rb:18:in `<main>'

call some_method:
        apparent receiver = #<IO:0x00000000bed2a0>
        backtrace:
                test.rb:2:in `some_method'
                test.rb:19:in `<main>'


Expected result:                

true receiver is #<IO:0x00000000bed2a0>

c-call write:
        apparent receiver = #<IO:0x00000000bed2a0>
        backtrace:
                somewhere:in `write'
                test.rb:18:in `<main>'

call some_method:
        apparent receiver = #<IO:0x00000000bed2a0>
        backtrace:
                test.rb:2:in `some_method'
                test.rb:19:in `<main>'



-- 
http://bugs.ruby-lang.org/

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