diff options
Diffstat (limited to 'erts/emulator/beam/erl_bif_guard.c')
| -rw-r--r-- | erts/emulator/beam/erl_bif_guard.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/erts/emulator/beam/erl_bif_guard.c b/erts/emulator/beam/erl_bif_guard.c index 8b47db10dd..440b0b4f14 100644 --- a/erts/emulator/beam/erl_bif_guard.c +++ b/erts/emulator/beam/erl_bif_guard.c @@ -1,19 +1,19 @@ /* * %CopyrightBegin% - * - * Copyright Ericsson AB 2006-2009. All Rights Reserved. - * + * + * Copyright Ericsson AB 2006-2010. All Rights Reserved. + * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in * compliance with the License. You should have received a copy of the * Erlang Public License along with this software. If not, it can be * retrieved online at http://www.erlang.org/. - * + * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. - * + * * %CopyrightEnd% */ @@ -318,6 +318,10 @@ double_to_integer(Process* p, double x) * The following code is used when a guard that may build on the * heap is called directly. They must not use HAlloc(), but must * do a garbage collection if there is insufficient heap space. + * + * Important note: All error checking MUST be done before doing + * a garbage collection. The compiler assumes that all registers + * are still valid if a guard BIF generates an exception. */ #define ERTS_NEED_GC(p, need) ((HEAP_LIMIT((p)) - HEAP_TOP((p))) <= (need)) |