Eclipse 4.4 Luna is affected by Bug 430736, which makes it unable to start Eclipse Luna under debian wheezy.
In fact, the crash occurs during the detection of an appropriate GTK+ library version and triggers a segmentation fault with glibc versions ≤ 2.13.
In order to allow running Eclipse Luna under debian wheezy, add the following lines to your eclipse.ini file:
-noSplash or setting
SWT_GTK3=0 may help, too.