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Leave the shape_id_t highest bit unused to avoid crashing YJIT

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Jean Boussier 2025-06-06 20:54:21 +02:00
parent 689ec51146
commit 54edc930f9
Notes: git 2025-06-07 16:31:01 +00:00 
Merged: https://github.com/ruby/ruby/pull/13556
1 changed files with 1 additions and 1 deletions
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shape.h
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@ -20,7 +20,7 @@ STATIC_ASSERT(shape_id_num_bits, SHAPE_ID_NUM_BITS == sizeof(shape_id_t) * CHAR_
#define SHAPE_ID_FL_NON_CANONICAL_MASK (SHAPE_FL_NON_CANONICAL_MASK << SHAPE_ID_OFFSET_NUM_BITS)
#define SHAPE_ID_HEAP_INDEX_BITS 3
#define SHAPE_ID_HEAP_INDEX_OFFSET (SHAPE_ID_NUM_BITS - SHAPE_ID_HEAP_INDEX_BITS)
#define SHAPE_ID_HEAP_INDEX_OFFSET (SHAPE_ID_NUM_BITS - SHAPE_ID_HEAP_INDEX_BITS - 1) // FIXME: -1 to avoid crashing YJIT
#define SHAPE_ID_HEAP_INDEX_MAX ((1 << SHAPE_ID_HEAP_INDEX_BITS) - 1)
#define SHAPE_ID_HEAP_INDEX_MASK (SHAPE_ID_HEAP_INDEX_MAX << SHAPE_ID_HEAP_INDEX_OFFSET)