[OpenJDK 2D-Dev] [PATCH FOR REVIEW] Building ExtensionSubtables.cpp should use -fno-strict-aliasing

Andrew Hughes ahughes at redhat.com
Wed May 23 12:59:48 UTC 2012

At present, the building of ExtensionSubtables.cpp produces a warning:

warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]

due to this code:

// read a 32-bit value that might only be 16-bit-aligned in memory                                                              
#define READ_LONG(code) (le_uint32)((SWAPW(*(le_uint16*)&code) << 16) + SWAPW(*(((le_uint16*)&code) + 1)))

where code is a le_uint32.

This can be avoided by setting -fno-strict-aliasing, as done in this webrev:


making the code safer in the process.

Ok for jdk8?  If so, can I have a bug ID for this please?

Andrew :)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

PGP Key: 248BDC07 (https://keys.indymedia.org/)
Fingerprint = EC5A 1F5E C0AD 1D15 8F1F  8F91 3B96 A578 248B DC07

More information about the 2d-dev mailing list