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authorJohn Högberg <[email protected]>2018-03-05 14:03:29 +0100
committerJohn Högberg <[email protected]>2018-03-05 14:10:07 +0100
commita091bcc99dd1c8ab5dc5e5f5e80ef254383170f4 (patch)
tree21b51bf4f9171ee9cb1d16f81df3b267a68d6e64 /erts/emulator/beam
parent7ac3e7857f49b231ada6517e6a2c92f302d54e0c (diff)
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Assert that sz <= MAX_ARITYVAL in make_arityval(sz)
Diffstat (limited to 'erts/emulator/beam')
-rw-r--r--erts/emulator/beam/bif.c2
-rw-r--r--erts/emulator/beam/erl_term.h3
2 files changed, 3 insertions, 2 deletions
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index d7a25adccb..92d49a6def 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -3171,7 +3171,7 @@ BIF_RETTYPE list_to_integer_2(BIF_ALIST_2)
static int do_float_to_charbuf(Process *p, Eterm efloat, Eterm list,
char *fbuf, int sizeof_fbuf) {
- const static int arity_two = make_arityval(2);
+ Eterm arity_two = make_arityval(2);
int decimals = SYS_DEFAULT_FLOAT_DECIMALS;
int compact = 0;
enum fmt_type_ {
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h
index 842802f8d9..b263be0738 100644
--- a/erts/emulator/beam/erl_term.h
+++ b/erts/emulator/beam/erl_term.h
@@ -317,7 +317,8 @@ _ET_DECLARE_CHECKED(Uint,header_arity,Eterm)
#define MAX_ARITYVAL ((((Uint)1) << 24) - 1)
#define ERTS_MAX_TUPLE_SIZE MAX_ARITYVAL
-#define make_arityval(sz) _make_header((sz),_TAG_HEADER_ARITYVAL)
+#define make_arityval(sz) (ASSERT((sz) <= MAX_ARITYVAL), \
+ _make_header((sz),_TAG_HEADER_ARITYVAL))
#define is_arity_value(x) (((x) & _TAG_HEADER_MASK) == _TAG_HEADER_ARITYVAL)
#define is_sane_arity_value(x) ((((x) & _TAG_HEADER_MASK) == _TAG_HEADER_ARITYVAL) && \
(((x) >> _HEADER_ARITY_OFFS) <= MAX_ARITYVAL))