4 files changed, 375 insertions, 0 deletions
diff --git a/spec/ruby/core/thread/shared/exit.rb b/spec/ruby/core/thread/shared/exit.rb
new file mode 100644
index 0000000000..13e8832684
--- /dev/null
+++ b/spec/ruby/core/thread/shared/exit.rb
@@ -0,0 +1,219 @@
+describe :thread_exit, shared: true do
+  before :each do
+    ScratchPad.clear
+  end
+
+  # This spec randomly kills mspec worker like: https://ci.appveyor.com/project/ruby/ruby/builds/19390874/job/wv1bsm8skd4e1pxl
+  # TODO: Investigate the cause or at least print helpful logs, and remove this `platform_is_not` guard.
+  platform_is_not :mingw do
+
+  it "kills sleeping thread" do
+    sleeping_thread = Thread.new do
+      sleep
+      ScratchPad.record :after_sleep
+    end
+    Thread.pass while sleeping_thread.status and sleeping_thread.status != "sleep"
+    sleeping_thread.send(@method)
+    sleeping_thread.join
+    ScratchPad.recorded.should == nil
+  end
+
+  it "kills current thread" do
+    thread = Thread.new do
+      Thread.current.send(@method)
+      ScratchPad.record :after_sleep
+    end
+    thread.join
+    ScratchPad.recorded.should == nil
+  end
+
+  it "runs ensure clause" do
+    thread = ThreadSpecs.dying_thread_ensures(@method) { ScratchPad.record :in_ensure_clause }
+    thread.join
+    ScratchPad.recorded.should == :in_ensure_clause
+  end
+
+  it "runs nested ensure clauses" do
+    ScratchPad.record []
+    @outer = Thread.new do
+      begin
+        @inner = Thread.new do
+          begin
+            sleep
+          ensure
+            ScratchPad << :inner_ensure_clause
+          end
+        end
+        sleep
+      ensure
+        ScratchPad << :outer_ensure_clause
+        @inner.send(@method)
+        @inner.join
+      end
+    end
+    Thread.pass while @outer.status and @outer.status != "sleep"
+    Thread.pass until @inner
+    Thread.pass while @inner.status and @inner.status != "sleep"
+    @outer.send(@method)
+    @outer.join
+    ScratchPad.recorded.should include(:inner_ensure_clause)
+    ScratchPad.recorded.should include(:outer_ensure_clause)
+  end
+
+  it "does not set $!" do
+    thread = ThreadSpecs.dying_thread_ensures(@method) { ScratchPad.record $! }
+    thread.join
+    ScratchPad.recorded.should == nil
+  end
+
+  it "does not reset $!" do
+    ScratchPad.record []
+
+    exc = RuntimeError.new("foo")
+    thread = Thread.new do
+      begin
+        raise exc
+      ensure
+        ScratchPad << $!
+        begin
+          Thread.current.send(@method)
+        ensure
+          ScratchPad << $!
+        end
+      end
+    end
+    thread.join
+    ScratchPad.recorded.should == [exc, exc]
+  end
+
+  it "cannot be rescued" do
+    thread = Thread.new do
+      begin
+        Thread.current.send(@method)
+      rescue Exception
+        ScratchPad.record :in_rescue
+      end
+      ScratchPad.record :end_of_thread_block
+    end
+
+    thread.join
+    ScratchPad.recorded.should == nil
+  end
+
+  it "kills the entire thread when a fiber is active" do
+    t = Thread.new do
+      Fiber.new do
+        sleep
+      end.resume
+      ScratchPad.record :fiber_resumed
+    end
+    Thread.pass while t.status and t.status != "sleep"
+    t.send(@method)
+    t.join
+    ScratchPad.recorded.should == nil
+  end
+
+  it "kills other fibers of that thread without running their ensure clauses" do
+    t = Thread.new do
+      f = Fiber.new do
+        ScratchPad.record :fiber_resumed
+        begin
+          Fiber.yield
+        ensure
+          ScratchPad.record :fiber_ensure
+        end
+      end
+      f.resume
+      sleep
+    end
+    Thread.pass until t.stop?
+    t.send(@method)
+    t.join
+    ScratchPad.recorded.should == :fiber_resumed
+  end
+
+  # This spec is a mess. It fails randomly, it hangs on MRI, it needs to be removed
+  quarantine! do
+  it "killing dying running does nothing" do
+    in_ensure_clause = false
+    exit_loop = true
+    t = ThreadSpecs.dying_thread_ensures do
+      in_ensure_clause = true
+      loop { if exit_loop then break end }
+      ScratchPad.record :after_stop
+    end
+
+    Thread.pass until in_ensure_clause == true
+    10.times { t.send(@method); Thread.pass }
+    exit_loop = true
+    t.join
+    ScratchPad.recorded.should == :after_stop
+  end
+  end
+
+  quarantine! do
+
+    it "propagates inner exception to Thread.join if there is an outer ensure clause" do
+      thread = ThreadSpecs.dying_thread_with_outer_ensure(@method) { }
+      -> { thread.join }.should raise_error(RuntimeError, "In dying thread")
+    end
+
+    it "runs all outer ensure clauses even if inner ensure clause raises exception" do
+      ThreadSpecs.join_dying_thread_with_outer_ensure(@method) { ScratchPad.record :in_outer_ensure_clause }
+      ScratchPad.recorded.should == :in_outer_ensure_clause
+    end
+
+    it "sets $! in outer ensure clause if inner ensure clause raises exception" do
+      ThreadSpecs.join_dying_thread_with_outer_ensure(@method) { ScratchPad.record $! }
+      ScratchPad.recorded.to_s.should == "In dying thread"
+    end
+  end
+
+  it "can be rescued by outer rescue clause when inner ensure clause raises exception" do
+    thread = Thread.new do
+      begin
+        begin
+          Thread.current.send(@method)
+        ensure
+          raise "In dying thread"
+        end
+      rescue Exception
+        ScratchPad.record $!
+      end
+      :end_of_thread_block
+    end
+
+    thread.value.should == :end_of_thread_block
+    ScratchPad.recorded.to_s.should == "In dying thread"
+  end
+
+  it "is deferred if ensure clause does Thread.stop" do
+    ThreadSpecs.wakeup_dying_sleeping_thread(@method) { Thread.stop; ScratchPad.record :after_sleep }
+    ScratchPad.recorded.should == :after_sleep
+  end
+
+  # Hangs on 1.8.6.114 OS X, possibly also on Linux
+  quarantine! do
+    it "is deferred if ensure clause sleeps" do
+      ThreadSpecs.wakeup_dying_sleeping_thread(@method) { sleep; ScratchPad.record :after_sleep }
+      ScratchPad.recorded.should == :after_sleep
+    end
+  end
+
+  # This case occurred in JRuby where native threads are used to provide
+  # the same behavior as MRI green threads. Key to this issue was the fact
+  # that the thread which called #exit in its block was also being explicitly
+  # sent #join from outside the thread. The 100.times provides a certain
+  # probability that the deadlock will occur. It was sufficient to reliably
+  # reproduce the deadlock in JRuby.
+  it "does not deadlock when called from within the thread while being joined from without" do
+    100.times do
+      t = Thread.new { Thread.stop; Thread.current.send(@method) }
+      Thread.pass while t.status and t.status != "sleep"
+      t.wakeup.should == t
+      t.join.should == t
+    end
+  end
+
+  end # platform_is_not :mingw
+end
diff --git a/spec/ruby/core/thread/shared/start.rb b/spec/ruby/core/thread/shared/start.rb
new file mode 100644
index 0000000000..2ba926bf00
--- /dev/null
+++ b/spec/ruby/core/thread/shared/start.rb
@@ -0,0 +1,41 @@
+describe :thread_start, shared: true do
+  before :each do
+    ScratchPad.clear
+  end
+
+  it "raises an ArgumentError if not passed a block" do
+    -> {
+      Thread.send(@method)
+    }.should raise_error(ArgumentError)
+  end
+
+  it "spawns a new Thread running the block" do
+    run = false
+    t = Thread.send(@method) { run = true }
+    t.should be_kind_of(Thread)
+    t.join
+
+    run.should be_true
+  end
+
+  it "respects Thread subclasses" do
+    c = Class.new(Thread)
+    t = c.send(@method) { }
+    t.should be_kind_of(c)
+
+    t.join
+  end
+
+  it "does not call #initialize" do
+    c = Class.new(Thread) do
+      def initialize
+        ScratchPad.record :bad
+      end
+    end
+
+    t = c.send(@method) { }
+    t.join
+
+    ScratchPad.recorded.should == nil
+  end
+end
diff --git a/spec/ruby/core/thread/shared/to_s.rb b/spec/ruby/core/thread/shared/to_s.rb
new file mode 100644
index 0000000000..43640deb33
--- /dev/null
+++ b/spec/ruby/core/thread/shared/to_s.rb
@@ -0,0 +1,53 @@
+require_relative '../fixtures/classes'
+
+describe :thread_to_s, shared: true do
+  it "returns a description including file and line number" do
+    thread, line = Thread.new { "hello" }, __LINE__
+    thread.join
+    thread.send(@method).should =~ /^#<Thread:([^ ]*?) #{Regexp.escape __FILE__}:#{line} \w+>$/
+  end
+
+  it "has a binary encoding" do
+    ThreadSpecs.status_of_current_thread.send(@method).encoding.should == Encoding::BINARY
+  end
+
+  it "can check it's own status" do
+    ThreadSpecs.status_of_current_thread.send(@method).should include('run')
+  end
+
+  it "describes a running thread" do
+    ThreadSpecs.status_of_running_thread.send(@method).should include('run')
+  end
+
+  it "describes a sleeping thread" do
+    ThreadSpecs.status_of_sleeping_thread.send(@method).should include('sleep')
+  end
+
+  it "describes a blocked thread" do
+    ThreadSpecs.status_of_blocked_thread.send(@method).should include('sleep')
+  end
+
+  it "describes a completed thread" do
+    ThreadSpecs.status_of_completed_thread.send(@method).should include('dead')
+  end
+
+  it "describes a killed thread" do
+    ThreadSpecs.status_of_killed_thread.send(@method).should include('dead')
+  end
+
+  it "describes a thread with an uncaught exception" do
+    ThreadSpecs.status_of_thread_with_uncaught_exception.send(@method).should include('dead')
+  end
+
+  it "describes a dying sleeping thread" do
+    ThreadSpecs.status_of_dying_sleeping_thread.send(@method).should include('sleep')
+  end
+
+  it "reports aborting on a killed thread" do
+    ThreadSpecs.status_of_dying_running_thread.send(@method).should include('aborting')
+  end
+
+  it "reports aborting on a killed thread after sleep" do
+    ThreadSpecs.status_of_dying_thread_after_sleep.send(@method).should include('aborting')
+  end
+end
diff --git a/spec/ruby/core/thread/shared/wakeup.rb b/spec/ruby/core/thread/shared/wakeup.rb
new file mode 100644
index 0000000000..6f010fea25
--- /dev/null
+++ b/spec/ruby/core/thread/shared/wakeup.rb
@@ -0,0 +1,62 @@
+describe :thread_wakeup, shared: true do
+  it "can interrupt Kernel#sleep" do
+    exit_loop = false
+    after_sleep1 = false
+    after_sleep2 = false
+
+    t = Thread.new do
+      while true
+        break if exit_loop == true
+        Thread.pass
+      end
+
+      sleep
+      after_sleep1 = true
+
+      sleep
+      after_sleep2 = true
+    end
+
+    10.times { t.send(@method); Thread.pass }
+    t.status.should_not == "sleep"
+
+    exit_loop = true
+
+    10.times { sleep 0.1 if t.status and t.status != "sleep" }
+    after_sleep1.should == false # t should be blocked on the first sleep
+    t.send(@method)
+
+    10.times { sleep 0.1 if after_sleep1 != true }
+    10.times { sleep 0.1 if t.status and t.status != "sleep" }
+    after_sleep2.should == false # t should be blocked on the second sleep
+    t.send(@method)
+
+    t.join
+  end
+
+  it "does not result in a deadlock" do
+    t = Thread.new do
+      10.times { Thread.stop }
+    end
+
+    while t.status
+      begin
+        t.send(@method)
+      rescue ThreadError
+        # The thread might die right after.
+        t.status.should == false
+      end
+      Thread.pass
+      sleep 0.001
+    end
+
+    t.status.should == false
+    t.join
+  end
+
+  it "raises a ThreadError when trying to wake up a dead thread" do
+    t = Thread.new { 1 }
+    t.join
+    -> { t.send @method }.should raise_error(ThreadError)
+  end
+end