Bug #20451
openBad Ruby 3.1.5 backport causes fiddle to fail to build
Description
Ruby 3.1.5 shipped with the following backport: https://github.com/ruby/ruby/commit/84f2aabd272a54e79979795d2d405090704a1d07
However this backport directly breaks the build:
closure.c:279:60: error: use of undeclared identifier 'data'
result = ffi_prep_closure(pcl, cif, callback, (void *)(data->self));
^
The original commit (https://github.com/ruby/fiddle/commit/2530496602) was updating the second branch to match the change in the first branch a couple lines up. However that change in the other branch does not exist in Ruby 3.1. The commit in question requires a previous commit of https://github.com/ruby/fiddle/commit/81a8a56239973ab7559229830a449d201955b494.
The backport should either be reverted or an other commit should also be backported. Note that these commits were in a series of many commits made to fix an upstream issue https://github.com/ruby/fiddle/issues/102 so I cannot vouch whether or not the two commits are sufficient to fix the originally reported issue.
Files
Updated by ylecuyer (Yoann Lecuyer) 6 days ago
Additional information:
From fiddle extconf:
case
when $mswin, $mingw, (libffi_version && (libffi_version <=> [3, 2]) >= 0)
$defs << "-DUSE_FFI_CLOSURE_ALLOC=1"
when (libffi_version && (libffi_version <=> [3, 2]) < 0)
else
have_func('ffi_closure_alloc', ffi_header)
end
and closure.c
#if USE_FFI_CLOSURE_ALLOC
result = ffi_prep_closure_loc(pcl, cif, callback,
(void *)self, cl->code);
#else
result = ffi_prep_closure(pcl, cif, callback, (void *)(data->self));
cl->code = (void *)pcl;
i = mprotect(pcl, sizeof(*pcl), PROT_READ | PROT_EXEC);
if (i) {
rb_sys_fail("mprotect");
}
#endif
With libffi > 3.2 it compiles without any issue (I tried with 3.4.4) and with older version there is the error described (test with 3.1.0)
Updated by ylecuyer (Yoann Lecuyer) 4 days ago
I went ahead and created https://github.com/ruby/ruby/pull/10695 to revert the faulty backport
@unak who you mind review it and release the patch version if accepted?
I checked the repro https://github.com/ruby/fiddle/issues/102#issuecomment-1241763091 within fedora 36 and everything is ok.
If people are still having an issue as described in https://github.com/ruby/fiddle/issues/102 they can bump to ruby 3.2 or 3.3 where it should be fixed
Updated by nobu (Nobuyoshi Nakada) 4 days ago ยท Edited
- Backport changed from 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN to 3.0: UNKNOWN, 3.1: REQUIRED, 3.2: DONTNEED, 3.3: DONTNEED
It seems a4ad6bd9aac564e93219284c912b26a72f9e82fc is missing.
https://github.com/ruby/ruby/pull/10696
Updated by ylecuyer (Yoann Lecuyer) 4 days ago
- File Dockerfile.ol8 Dockerfile.ol8 added
I tested both PR with ol8/ol9 using the attached dockerfile and they both work OK
I'll close my PR in favor of yours as it is more complete regarding the backport.