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iseq.h: check range

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* iseq.h (iseq_catch_table_bytes): check range and suppress a
  warning.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46854 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-07-17 16:54:59 +00:00
parent 083c5896ca
commit ca2d6be10f
1 changed files with 6 additions and 2 deletions
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8
iseq.h
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@ -76,8 +76,12 @@ PACKED_STRUCT_UNALIGNED(struct iseq_catch_table {
static inline int
iseq_catch_table_bytes(int n)
{
return sizeof(struct iseq_catch_table) +
(n - 1) * sizeof(struct iseq_catch_table_entry);
enum {
catch_table_entries_max = (INT_MAX - sizeof(struct iseq_catch_table)) / sizeof(struct iseq_catch_table_entry)
};
if (n > catch_table_entries_max) rb_fatal("too large iseq_catch_table - %d", n);
return (int)(sizeof(struct iseq_catch_table) +
(n - 1) * sizeof(struct iseq_catch_table_entry));
}
#define INITIAL_ISEQ_COMPILE_DATA_STORAGE_BUFF_SIZE (512)