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author | Patrik Nyblom <[email protected]> | 2009-12-07 15:25:32 +0100 |
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committer | Björn Gustavsson <[email protected]> | 2010-03-10 14:23:54 +0100 |
commit | 5a8e6c4183a30f3b10de22fa5ba80950dfb2adea (patch) | |
tree | 1b1830bf144427531d7be5aa968e02bb2e67539e /erts/emulator/beam/erl_bif_port.c | |
parent | 356c33b6063de632f9c98c66260603e6edbc3ee5 (diff) | |
download | otp-5a8e6c4183a30f3b10de22fa5ba80950dfb2adea.tar.gz otp-5a8e6c4183a30f3b10de22fa5ba80950dfb2adea.tar.bz2 otp-5a8e6c4183a30f3b10de22fa5ba80950dfb2adea.zip |
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.
Diffstat (limited to 'erts/emulator/beam/erl_bif_port.c')
-rw-r--r-- | erts/emulator/beam/erl_bif_port.c | 4 |
1 files changed, 3 insertions, 1 deletions
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; } |