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attempt to fix rb_alloc_tmp_buffer2 for ALLOCV_N

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This is a confusing function to my arithmetic-challenged mind,
but nobu seems alright with this.  Anyways this lets me use
large values of elsize without segfaulting, and "make exam"
passes.

* include/ruby/ruby.h (rb_alloc_tmp_buffer2): attempt to fix
  [ruby-core:81388] [ruby-core:81391] [Bug #13595]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58902 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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normal 2017-05-26 07:28:23 +00:00
parent 5e7ce51911
commit 190e29f72e
1 changed files with 1 additions and 1 deletions
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include/ruby/ruby.h
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@ -1611,7 +1611,7 @@ static inline void *
rb_alloc_tmp_buffer2(volatile VALUE *store, long count, size_t elsize) rb_alloc_tmp_buffer2(volatile VALUE *store, long count, size_t elsize)
{ {
size_t cnt = (size_t)count; size_t cnt = (size_t)count;
if (elsize % sizeof(VALUE) == 0) { if (elsize == sizeof(VALUE)) {
if (RB_UNLIKELY(cnt > LONG_MAX / sizeof(VALUE))) { if (RB_UNLIKELY(cnt > LONG_MAX / sizeof(VALUE))) {
ruby_malloc_size_overflow(cnt, elsize); ruby_malloc_size_overflow(cnt, elsize);
} }