otp.git - Mirror of Erlang/OTP repository.

Age	Commit message (Collapse)	Author
2010-03-10	Store pointers to heap data in 32-bit words	Patrik Nyblom
	Store Erlang terms in 32-bit entities on the heap, expanding the pointers to 64-bit when needed. This works because all terms are stored on addresses in the 32-bit address range (the 32 most significant bits of pointers to term data are always 0). Introduce a new datatype called UWord (along with its companion SWord), which is an integer having the exact same size as the machine word (a void *), but might be larger than Eterm/Uint. Store code as machine words, as the instructions are pointers to executable code which might reside outside the 32-bit address range. Continuation pointers are stored on the 32-bit stack and hence must point to addresses in the low range, which means that loaded beam code much be placed in the low 32-bit address range (but, as said earlier, the instructions themselves are full words). No Erlang term data can be stored on C stacks (enforced by an earlier commit). This version gives a prompt, but test cases still fail (and dump core). The loader (and emulator loop) has instruction packing disabled. The main issues has been in rewriting loader and actual virtual machine. Subsystems (like distribution) does not work yet.
2010-03-10	Add a custom mmap wrapper to force heaps into the lower address range	Patrik Nyblom
	The free list is still rudimentary for the mmap wrapper and a better implementation will be needed for production quality.
2010-03-10	Fit all heap data into the 32-bit address range	Patrik Nyblom
	This is the first step in the implementation of the half-word emulator, a 64-bit emulator where all pointers to heap data will be stored in 32-bit words. Code specific for this emulator variant is conditionally compiled when the HALFWORD_HEAP define has a non-zero value. First force all pointers to heap data to fall into a single 32-bit range, but still store them in 64-bit words. Temporary term data stored on C stack is moved into scheduler specific storage (allocated as heaps) and macros are added to make this happen only in emulators where this is needed. For a vanilla VM the temporary terms are still stored on the C stack.
2010-02-08	OTP-8412 Fixed numerous compiler warnings generated by gcc 4.4.1 and	Rickard Green
	tile-cc 2.0.1.78377 when compiling the runtime system.
2009-11-20	The R13B03 release.OTP_R13B03	Erlang/OTP