[Tarantool-patches] [PATCH luajit 3/4] FFI: Allow ffi.metatype() for typedefs with attributes.
Sergey Bronnikov
sergeyb at tarantool.org
Tue Jun 11 18:48:01 MSK 2024
Hi, Sergey
thanks for the patch! LGTM with a nit below.
On 03.06.2024 17:34, Sergey Kaplun wrote:
> From: Mike Pall <mike>
>
> Reported by Eric Gouyer.
>
> (cherry picked from commit 27a6fee82e91319bbed8c3aa443aa2b0f1b0a470)
>
> Before the patch, `ffi.metatype()` raises an error when calling it on
> ctype with attributes. This patch fixes the behaviour by using
extra whitespace above
> `ctype_raw()` instead of `ctype_get()` to follow child ctypes unless
> there are no attributes on the ctype.
>
> Sergey Kaplun:
> * added the description and the test for the problem
>
> Part of tarantool/tarantool#9924
> ---
> src/lib_ffi.c | 2 +-
> test/tarantool-tests/lj-861-ctype-attributes.test.lua | 10 +++++++---
> 2 files changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/src/lib_ffi.c b/src/lib_ffi.c
> index 2bfca25a..dfb01658 100644
> --- a/src/lib_ffi.c
> +++ b/src/lib_ffi.c
> @@ -770,7 +770,7 @@ LJLIB_CF(ffi_metatype)
> CTypeID id = ffi_checkctype(L, cts, NULL);
> GCtab *mt = lj_lib_checktab(L, 2);
> GCtab *t = cts->miscmap;
> - CType *ct = ctype_get(cts, id); /* Only allow raw types. */
> + CType *ct = ctype_raw(cts, id);
> TValue *tv;
> GCcdata *cd;
> if (!(ctype_isstruct(ct->info) || ctype_iscomplex(ct->info) ||
> diff --git a/test/tarantool-tests/lj-861-ctype-attributes.test.lua b/test/tarantool-tests/lj-861-ctype-attributes.test.lua
> index e8b29d67..a407fae0 100644
> --- a/test/tarantool-tests/lj-861-ctype-attributes.test.lua
> +++ b/test/tarantool-tests/lj-861-ctype-attributes.test.lua
> @@ -7,14 +7,14 @@ local tap = require('tap')
> local test = tap.test('lj-861-ctype-attributes')
> local ffi = require('ffi')
>
> -test:plan(4)
> +test:plan(5)
>
> local EXPECTED_ALIGN = 4
>
> ffi.cdef([[
> -struct __attribute__((aligned($))) s_aligned {
> +typedef struct __attribute__((aligned($))) s_aligned {
> uint8_t a;
> -};
> +} s_aligned;
>
> struct test_parsing_sizeof {
> char a[sizeof(struct s_aligned &)];
> @@ -37,4 +37,8 @@ test:is(ffi.sizeof('struct test_parsing_sizeof'), EXPECTED_ALIGN,
> test:is(ffi.sizeof('struct test_parsing_alignof'), EXPECTED_ALIGN,
> 'correct alignof during C parsing')
>
> +local ok, _ = pcall(ffi.metatype, 's_aligned', {})
> +
> +test:ok(ok, 'ffi.metatype is called at the structure with attributes')
> +
> test:done(true)
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