This change fixes the bug described in https://bugs.ruby-lang.org/issues/17880.
Checking `ractor_shareable_p` will cause the method to call back into
Ruby. Anything calling this method can't be a leaf instruction,
otherwise it could crash. By adding `attr bool leaf = false` we no
longer crash because it marks the function as not a leaf.
Here's a simplified reproduction script:
```ruby
require "set"
class Id
attr_reader :db_id
def initialize(db_id)
@db_id = db_id
end
def ==(other)
other.class == self.class && other.db_id == db_id
end
alias_method :eql?, :==
def hash
10
end
def <=>(other)
db_id <=> other.db_id if other.is_a?(self.class)
end
end
class Namespace
IDS = Set[
Id.new(1).freeze,
Id.new(2).freeze,
Id.new(3).freeze,
Id.new(4).freeze,
].freeze
class << self
def test?(id)
IDS.include?(id)
end
end
end
p Namespace.test?(Id.new(1))
p Namespace.test?(Id.new(5))
```
Co-authored-by: Aaron Patterson <tenderlove@ruby-lang.org>
Co-authored-by: Aaron Patterson <tenderlove@ruby-lang.org>
* Wake up join list within thread EC context.
* Consume items from join list so that they are not re-executed.
If `rb_fiber_scheduler_unblock` raises an exception, it can result in a
segfault if `rb_threadptr_join_list_wakeup` is not within a valid EC. This
change moves `rb_threadptr_join_list_wakeup` into the thread's top level EC
which initially caused an infinite loop because on exception will retry. We
explicitly remove items from the thread's join list to avoid this situation.
* Verify the required scheduler interface.
* Test several scheduler hooks methods with broken `unblock` implementation.
If we are during incremental sweeping when calling gc_set_initial_pages
there is an assertion error. The following patch will artificially
produce the bug:
```
diff --git a/gc.c b/gc.c
index c3157dbe2c..d7282cf8f0 100644
--- a/gc.c
+++ b/gc.c
@@ -404,7 +404,7 @@ int ruby_rgengc_debug;
* 5: show all references
*/
#ifndef RGENGC_CHECK_MODE
-#define RGENGC_CHECK_MODE 0
+#define RGENGC_CHECK_MODE 1
#endif
// Note: using RUBY_ASSERT_WHEN() extend a macro in expr (info by nobu).
@@ -10821,6 +10821,10 @@ gc_set_initial_pages(void)
void
ruby_gc_set_params(void)
{
+ for (int i = 0; i < 10000; i++) {
+ rb_ary_new();
+ }
+
/* RUBY_GC_HEAP_FREE_SLOTS */
if (get_envparam_size("RUBY_GC_HEAP_FREE_SLOTS", &gc_params.heap_free_slots, 0)) {
/* ok */
```
The crash looks like:
```
Assertion Failed: ../gc.c:2038:heap_add_page:!(heap == heap_eden && heap->sweeping_page)
```
by a race condition by multiple Ractors.
Atmically incrementing body->total_calls may have its own cost, so for
now we intentionally leave the unreliable total_calls. So we allow an
ISeq to be never pushed when you use multiple Ractors. However, if you
enqueue a single ccan node twice, get_from_list loops infinitely. Thus
this patch takes care of such a situation.
Align the Travis enabling timing with GitHub Actions.
For the syntax, see <https://docs.travis-ci.com/user/conditions-v1>.
We use `repo` syntax rather than `fork = true/false` syntax to show a general usage in any repositories on GitHub.
The non-forked repo is not always a primary repo in any GitHub repositories.
[Bug #17936]
ENV.dup returned a plain Object, since all of ENV's behavior is
defined in ENV's singleton class. So using dup makes no sense.
ENV.clone works and is used in some gems, but it doesn't do what
the user expects, since modifying ENV.clone also modifies ENV.
Add a deprecation warning pointing the user to use ENV.to_h
instead.
This also undefines some private initialize* methods in ENV,
since they are not needed.
Fixes [Bug #17767]
If we crash during GC, allocating new objects in the segv handler can
cause an infinite loop. This commit is to avoid creating new objects in
the crash handler
