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This reverts commit 35136e1e9c232ad7a03407b992b2e86b6df43f63.
test-spec has been failing since this revision.
.github/workflows/compilers.yml:82
https://github.com/ruby/ruby/actions/runs/4276884159/jobs/7445299562
```
env:
# Minimal flags to pass the check.
default_cc: 'gcc-11 -fcf-protection -Wa,--generate-missing-build-notes=yes'
optflags: '-O2'
LDFLAGS: '-Wl,-z,now'
# FIXME: Drop skipping options
# https://bugs.ruby-lang.org/issues/18061
# https://sourceware.org/annobin/annobin.html/Test-pie.html
TEST_ANNOCHECK_OPTS: "--skip-pie --skip-gaps"
```
Failure:
```
1)
An exception occurred during: Kernel#require (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:317
Kernel#require (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded ERROR
LeakError: Leaked file descriptor: 8 : #<File:/__w/ruby/ruby/src/spec/ruby/fixtures/code/load_fixture.ext.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:5:in `<top (required)>'
2)
An exception occurred during: Kernel#require ($LOADED_FEATURES) stores an absolute path
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:330
Kernel#require ($LOADED_FEATURES) stores an absolute path ERROR
LeakError: Closed file descriptor: 8
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:5:in `<top (required)>'
3)
An exception occurred during: Kernel#require ($LOADED_FEATURES) does not load a non-canonical path for a file already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:535
Kernel#require ($LOADED_FEATURES) does not load a non-canonical path for a file already loaded ERROR
LeakError: Leaked file descriptor: 8 : #<File:/__w/ruby/ruby/src/spec/ruby/fixtures/code/load_fixture.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:5:in `<top (required)>'
4)
An exception occurred during: Kernel#require ($LOADED_FEATURES) does not load a ../ relative path for a file already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:551
Kernel#require ($LOADED_FEATURES) does not load a ../ relative path for a file already loaded ERROR
LeakError: Leaked file descriptor: 9 : #<File:../code/load_fixture.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:5:in `<top (required)>'
5)
An exception occurred during: Kernel#require ($LOADED_FEATURES) complex, enumerator, rational, thread, ruby2_keywords are already required
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:563
Kernel#require ($LOADED_FEATURES) complex, enumerator, rational, thread, ruby2_keywords are already required ERROR
LeakError: Closed file descriptor: 8
Closed file descriptor: 9
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:5:in `<top (required)>'
6)
An exception occurred during: Kernel.require (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:317
Kernel.require (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded ERROR
LeakError: Leaked file descriptor: 8 : #<File:/__w/ruby/ruby/src/spec/ruby/fixtures/code/load_fixture.ext.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:23:in `<top (required)>'
7)
An exception occurred during: Kernel.require ($LOADED_FEATURES) stores an absolute path
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:330
Kernel.require ($LOADED_FEATURES) stores an absolute path ERROR
LeakError: Closed file descriptor: 8
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:23:in `<top (required)>'
8)
An exception occurred during: Kernel.require ($LOADED_FEATURES) does not load a non-canonical path for a file already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:535
Kernel.require ($LOADED_FEATURES) does not load a non-canonical path for a file already loaded ERROR
LeakError: Leaked file descriptor: 8 : #<File:/__w/ruby/ruby/src/spec/ruby/fixtures/code/load_fixture.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:23:in `<top (required)>'
9)
An exception occurred during: Kernel.require ($LOADED_FEATURES) does not load a ../ relative path for a file already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:551
Kernel.require ($LOADED_FEATURES) does not load a ../ relative path for a file already loaded ERROR
LeakError: Leaked file descriptor: 9 : #<File:../code/load_fixture.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:23:in `<top (required)>'
10)
An exception occurred during: Kernel.require ($LOADED_FEATURES) complex, enumerator, rational, thread, ruby2_keywords are already required
/__w/ruby/ruby/src/spec/ruby/core/kernel/shared/require.rb:563
Kernel.require ($LOADED_FEATURES) complex, enumerator, rational, thread, ruby2_keywords are already required ERROR
LeakError: Closed file descriptor: 8
Closed file descriptor: 9
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_spec.rb:23:in `<top (required)>'
11)
An exception occurred during: Kernel#require_relative with a relative path (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:197
Kernel#require_relative with a relative path (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded ERROR
LeakError: Leaked file descriptor: 8 : #<File:/__w/ruby/ruby/src/spec/ruby/fixtures/code/load_fixture.ext.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:4:in `<top (required)>'
12)
An exception occurred during: Kernel#require_relative with a relative path ($LOADED_FEATURES) stores an absolute path
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:205
Kernel#require_relative with a relative path ($LOADED_FEATURES) stores an absolute path ERROR
LeakError: Closed file descriptor: 8
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:4:in `<top (required)>'
13)
An exception occurred during: Kernel#require_relative with an absolute path (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:399
Kernel#require_relative with an absolute path (file extensions) does not load a C-extension file if a complex-extensioned .rb file is already loaded ERROR
LeakError: Leaked file descriptor: 8 : #<File:/__w/ruby/ruby/src/spec/ruby/fixtures/code/load_fixture.ext.rb>
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:277:in `<top (required)>'
14)
An exception occurred during: Kernel#require_relative with an absolute path ($LOAD_FEATURES) stores an absolute path
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:407
Kernel#require_relative with an absolute path ($LOAD_FEATURES) stores an absolute path ERROR
LeakError: Closed file descriptor: 8
/__w/ruby/ruby/src/spec/ruby/core/kernel/require_relative_spec.rb:277:in `<top (required)>'
```
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When loading Ruby source files, we can save the result of
successful opens as open(2)/openat(2) are a fairly expensive
syscalls. This also avoids a time-of-check-to-time-of-use
(TOCTTOU) problem.
This reduces open(2) syscalls during `require'; but should be
most apparent when users have a small $LOAD_PATH. Users with
large $LOAD_PATH will benefit less since there'll be more
open(2) failures due to ENOENT.
With `strace -c -e openat ruby -e exit' under Linux, this
results in a ~14% reduction of openat(2) syscalls
(glibc uses openat(2) to implement open(2)).
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
0.00 0.000000 0 296 110 openat
0.00 0.000000 0 254 110 openat
Additionally, the introduction of `struct ruby_file_load_state'
may make future optimizations more apparent.
This change cannot benefit binary (.so) loading since the
dlopen(3) API requires a filename and I'm not aware of an
alternative that takes a pre-existing FD. In typical
situations, Ruby source files outnumber the mount of .so
files.
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These contents are purely implementation details, not worth appearing in
CAPI documents. [ci skip]
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According to MSVC manual (*1), cl.exe can skip including a header file
when that:
- contains #pragma once, or
- starts with #ifndef, or
- starts with #if ! defined.
GCC has a similar trick (*2), but it acts more stricter (e. g. there
must be _no tokens_ outside of #ifndef...#endif).
Sun C lacked #pragma once for a looong time. Oracle Developer Studio
12.5 finally implemented it, but we cannot assume such recent version.
This changeset modifies header files so that each of them include
strictly one #ifndef...#endif. I believe this is the most portable way
to trigger compiler optimizations. [Bug #16770]
*1: https://docs.microsoft.com/en-us/cpp/preprocessor/once
*2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
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Split ruby.h
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These headers need no rewrite. Just add some minor tweaks, like
addition of #include lines. Mainly cosmetic.
TIMET_MAX_PLUS_ONE was deleted because the macro was used from only
one place (directly write expression there).
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Reduce macros for readability. Also transplanted some part of
internal/file.h into here because the delcared functions are in fact
defined in error.c.
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One day, I could not resist the way it was written. I finally started
to make the code clean. This changeset is the beginning of a series of
housekeeping commits. It is a simple refactoring; split internal.h into
files, so that we can divide and concur in the upcoming commits. No
lines of codes are either added or removed, except the obvious file
headers/footers. The generated binary is identical to the one before.
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