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uintptr_t is wrong size on 64-bit JRuby #2293

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djberg96 opened this issue Dec 9, 2014 · 1 comment
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uintptr_t is wrong size on 64-bit JRuby #2293

djberg96 opened this issue Dec 9, 2014 · 1 comment
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ffi JRuby 1.7.x JRuby 9000
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JRuby 1.7.21

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@djberg96
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djberg96 commented Dec 9, 2014

Also posted here: ffi/ffi#396

I noticed that a 64-bit JRuby is handling :uintptr_t incorrectly. It should give me an 8 byte pointer, but I'm getting a 4 byte pointer instead:

#64-bit MRI returns 8, but a 64-bit JRuby returns 4
FFI::MemoryPointer.new(:uintptr_t).size

My workaround for now is this:

if RUBY_PLATFORM == 'java' && ENV_JAVA['sun.arch.data.model'] == '64'
  :ulong_long
else
  :uintptr_t
end
@djberg96 djberg96 mentioned this issue Dec 9, 2014
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@jsvd
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jsvd commented May 20, 2015

this is related to #1718

@jsvd jsvd mentioned this issue May 20, 2015
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headius added a commit that referenced this issue May 26, 2015
@headius
Set proper uintptr_t size for FFI in win64 platform. Fixes #2293.
1d613d6 
Also fixes #1718.
@headius headius added this to the JRuby 1.7.21 milestone May 26, 2015
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ffi JRuby 1.7.x JRuby 9000
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