[9] RFR(S): 8155046: Parse::Block construction using undefined behavior

[Tobias Hartmann]

Hi,

please review the following patch:

https://bugs.openjdk.java.net/browse/JDK-8155046
http://cr.openjdk.java.net/~thartmann/8155046/webrev.00/

Parse::init_blocks() initializes _blocks by allocating a chunk of memory and initializing the elements by treating them as blocks and calling Parse::Block::init_node(). This is undefined behavior because the objects are not created with "new". I replaced init_node() with the constructor and use placement new to create the blocks. I also added missing field initializations to the constructor.

Tested with JPRT and RBT (running).

Thanks,
Tobias