Bug #16030: test_memsize fails on x32 ABI: Unsupported RVALUE_SIZE=24

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.5.5p157 (2019-03-15 revision 67260) [x86_64-linux-gnux32]
• Backport: 2.5: UNKNOWN, 2.6: UNKNOWN

[GreenReaper (Laurence Parry)]

Tests fail on Debian's build system for the x32 ABI port for ruby-2.5 over a single issue:
https://buildd.debian.org/status/package.php?p=ruby2.5&suite=sid#problem-6

  1) Failure:
TestTime#test_memsize [/<<PKGBUILDDIR>>/test/ruby/test_time.rb:1160]:
Unsupported RVALUE_SIZE=24, update test_memsize

The full log is at https://buildd.debian.org/status/fetch.php?pkg=ruby2.5&arch=x32&ver=2.5.5-4&stamp=1564494509&raw=0

I believe the necessary change is to add the line:

    when 24 then expect = 54

to def test_memsize at the end of ruby/test/ruby/test_time.rb, based on the following test I ran:

require 'test/unit'
require 'delegate'
require 'timeout'
require 'delegate'
require 'objspace'
t = Time.at(0)
size = GC::INTERNAL_CONSTANTS[:RVALUE_SIZE]
puts size
puts ObjectSpace.memsize_of(t)

which output 24 and 54 respectively.

On x32, time_t is 64-bit, but pointers are 32-bit, so it makes sense that it's just 4 more than the 20 case for regular 32-bit.

Previous email to Debain maintainers:
https://www.mail-archive.com/[e-mail]/msg04431.html

Debian bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=920017

• Status changed from Open to Closed

Applied in changeset git|ee821e90741ebedc6c7a3bb0e8b67e59f3a44022.

---

Update test to handle x32 ABI compiled Ruby on Linux

Suggestion from Laurence Parry.

Fixes [Bug #16030]