From: "jaruga (Jun Aruga)" <noreply@...>
Date: 2022-11-10T17:03:29+00:00
Subject: [ruby-core:110697] [Ruby master Misc#19120] How does YJIT work in --enable-shared case?

Issue #19120 has been updated by jaruga (Jun Aruga).


> How can we test the content of the yjit/src/**/*.rs? For example, if the command below works, I can say that I tested the content of the yjit/src/**/*.rs?

Here is a bit old commit on the master branch `131c31a9209c61f84d318aa18b61f468f48b8219`. It was compiled with `./configure --enable-yjit=dev --enable-shared --prefix=$HOME/local/ruby-yjit-dev-so-131c31a920`. Can I say that I executed the content of the yjit/src/**/*.rs?

```
$ which ruby
~/local/ruby-yjit-dev-so-131c31a920/bin/ruby

$ ruby --yjit --yjit-call-threshold=1 --yjit-stats -e 'puts "abc"'
abc
***YJIT: Printing YJIT statistics on exit***
method call exit reasons: 
    (all relevant counters are zero)
invokesuper exit reasons: 
    (all relevant counters are zero)
leave exit reasons: 
    interp_return          1 (100.0%)
getblockparamproxy exit reasons: 
    (all relevant counters are zero)
getinstancevariable exit reasons:
    (all relevant counters are zero)
setinstancevariable exit reasons:
    (all relevant counters are zero)
opt_aref exit reasons: 
    (all relevant counters are zero)
expandarray exit reasons: 
    (all relevant counters are zero)
opt_getinlinecache exit reasons: 
    (all relevant counters are zero)
invalidation reasons: 
    (all relevant counters are zero)
bindings_allocations:          73
bindings_set:                   0
compiled_block_count:           8
compiled_iseq_count:            4
compiled_page_count:            1
freed_iseq_count:               0
freed_page_count:               0
invalidation_count:             0
constant_state_bumps:           0
inline_code_size:            1047
outlined_code_size:           643
freed_code_size:                0
code_gc_count:                  0
num_gc_obj_refs:                9
total_exit_count:               1
total_insns_count:         233888
vm_insns_count:            233876
yjit_insns_count:              12
ratio_in_yjit:               0.0%
avg_len_in_yjit:             12.0
total_exits:                    0
```



----------------------------------------
Misc #19120: How does YJIT work in --enable-shared case?
https://bugs.ruby-lang.org/issues/19120#change-100039

* Author: jaruga (Jun Aruga)
* Status: Open
* Priority: Normal
----------------------------------------
We are trying to add the new YJIT feature that is ported to Rust[1][2] in Ruby 3.2 RPM on Fedora project.[3]
I am trying to understand how the YJIT works in the case the `./configure --enable-yjit --enable-shared`. In the case below, when building Ruby on the latest master branch `199b59f065ce6f1c13b8424f35a70c513523211b`, the static libraries `libruby-static.a` and `./libruby-static.a` were built.

```
<mock-chroot> sh-5.2$ cat /etc/fedora-release 
Fedora release 38 (Rawhide)

<mock-chroot> sh-5.2$ ./autogen.sh

<mock-chroot> sh-5.2$ ./configure --prefix=$HOME/local/ruby-yjit-199b59f065 --enable-shared --enable-yjit 2>&1 | tee configure.log
...
   * MJIT support:        yes
   * YJIT support:        yes

<mock-chroot> sh-5.2$ make

<mock-chroot> sh-5.2$ find . -name "*.a"
./yjit/target/release/libyjit.a
./libruby-static.a
```

After running `make install`, these static libraries (`*.a` files) were not copied to the installed directory. That makes sense, as Ruby works with shared libraries (`*.so` files).

```
<mock-chroot> sh-5.2$ make install 2>&1 | tee make_install.log

<mock-chroot> sh-5.2$ find ~/local/ruby-yjit-199b59f065/ -name "*.a"
=> empty
```

In this case, we really don't need the `libyjit.a` to run the YJIT right? I couldn't find the .so file something like `yjit.so`. Which .so file contains the YJIT feature (maybe the content of the `yjit/src/**/*.rs`)?

```
<mock-chroot> sh-5.2$ find ~/local/ruby-yjit-199b59f065/ -name "*.so" | grep yjit.so
=> empty
```

How can we test the content of the `yjit/src/**/*.rs`? For example, if the command below works, I can say that I tested the content of the `yjit/src/**/*.rs`?

```
<mock-chroot> sh-5.2$ which rustc
/usr/bin/rustc

<mock-chroot> sh-5.2$ rustc --version
rustc 1.65.0 (Fedora 1.65.0-1.fc38)

<mock-chroot> sh-5.2$ ~/local/ruby-yjit-199b59f065/bin/ruby --yjit -e 'puts "abc"'
abc
```

## References

* [1] https://bugs.ruby-lang.org/issues/18481
* [2] https://github.com/ruby/ruby/commit/f90549cd38518231a6a74432fe1168c943a7cc18#diff-1d53751ddf3ffeb25cfe609c6bd28746651e23ea81d51fe582b0f635f0896e0d
* [3] https://src.fedoraproject.org/rpms/ruby/pull-request/139




-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>