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aot compiler: Track non-0x00 tableindex as ref types use (#3695)

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Any use of a table index that isn't exactly a null byte (`0x00`) means that
the module makes use of the reference types proposal. This is important
to track because `aot_compiler.c` will blindly assume that all table indices
are a single byte long otherwise.

This fixes a crash in WAMR for modules that contain multi-byte encodings
of table indices in `call_indirect` but make no other use of reference types
features.
This commit is contained in:
Jan Olaf Martin 2024-08-15 21:37:10 -07:00 committed by GitHub
parent a44c487632
commit 59f761b58d
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1 changed files with 8 additions and 0 deletions
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8
core/iwasm/interpreter/wasm_loader.c
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@ -12004,6 +12004,14 @@ re_scan:
read_leb_uint32(p, p_end, type_idx);
#if WASM_ENABLE_REF_TYPES != 0 || WASM_ENABLE_GC != 0
#if WASM_ENABLE_WAMR_COMPILER != 0
if (*p != 0x00) {
// Any non-0x00 byte requires the ref types proposal.
// This is different from checking the table_idx value
// since `0x80 0x00` etc. are all valid encodings of zero.
module->is_ref_types_used = true;
}
#endif
read_leb_uint32(p, p_end, table_idx);
#else
CHECK_BUF(p, p_end, 1);