JNI UTF-8 encoding bug with some characters

Ariel Weisberg ariel at weisberg.ws
Tue Jun 5 15:38:04 UTC 2012

Hi all,

Not sure what list this should go to.

I found an issue with JNI's GetStringUTFChars which is supposed to
return a Java string in UTF-8 encoding. There is an attached test case.
I tested on Ubuntu 12.04 (Linux aweisberg-desktop 2.6.32-41-generic
#89-Ubuntu SMP Fri Apr 27 22:18:56 UTC 2012 x86_64 GNU/Linux) and CentOS
5 (Linux volt3b 2.6.18-308.4.1.el5 #1 SMP Tue Apr 17 17:08:00 EDT 2012
x86_64 x86_64 x86_64 GNU/Linux) with JDK 6 update 32 and JDK 7 update 4.

For the following string "â��x一xxéyyԱ" I find that the first character is
encoded correctly, but the second character
(http://www.fileformat.info/info/unicode/char/1f032/index.htm) comes out
with an invalid code point.

The result of String.getBytes("UTF-8") is
c3a2f09f80b278e4b8807878c3a97979d4b1 and this matches the output I get
from defining the string as a constant in C++.

The result of GetStringUTFChars is c3a2eda0bcedb0b278e4b8.

See this test case
for a reproducer and how I displayed the values.


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