From 5a8e6c4183a30f3b10de22fa5ba80950dfb2adea Mon Sep 17 00:00:00 2001 From: Patrik Nyblom Date: Mon, 7 Dec 2009 15:25:32 +0100 Subject: Fit all heap data into the 32-bit address range 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. --- erts/emulator/beam/erl_bif_port.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'erts/emulator/beam/erl_bif_port.c') diff --git a/erts/emulator/beam/erl_bif_port.c b/erts/emulator/beam/erl_bif_port.c index f454f2e12d..f9d97ee1ab 100644 --- a/erts/emulator/beam/erl_bif_port.c +++ b/erts/emulator/beam/erl_bif_port.c @@ -716,15 +716,17 @@ open_port(Process* p, Eterm name, Eterm settings, int *err_nump) } } else if (option == am_cd) { Eterm iolist; - Eterm heap[4]; + DeclareTmpHeap(heap,4,p); int r; + UseTmpHeap(4,p); heap[0] = *tp; heap[1] = make_list(heap+2); heap[2] = make_small(0); heap[3] = NIL; iolist = make_list(heap); r = io_list_to_buf(iolist, (char*) dir, MAXPATHLEN); + UnUseTmpHeap(4,p); if (r < 0) { goto badarg; } -- cgit v1.2.3