merge revision(s) 58769,59710,59712: [Backport #13566]

	Treat NULL reference case [Bug #13566]

	Fix C level backtrace on Darwin

	SEGV caused by invalid instruction call.

	skip unless PLATFORM is darwin.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@62639 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 21 insertions, 0 deletions

diff --git a/test/ruby/test_vm_dump.rb b/test/ruby/test_vm_dump.rb
new file mode 100644
index 0000000000..7144a0cbc6
--- /dev/null
+++ b/test/ruby/test_vm_dump.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+require 'test/unit'
+
+class TestVMDump < Test::Unit::TestCase
+  def assert_darwin_vm_dump_works(args)
+    skip if RUBY_PLATFORM !~ /darwin/
+    assert_in_out_err(args, "", [], [:*, /^.* main \+ \d+$/, :*, /^\[IMPORTANT\]/, :*])
+  end
+
+  def test_darwin_invalid_call
+    assert_darwin_vm_dump_works(['-rfiddle', '-eFiddle::Function.new(Fiddle::Pointer.new(1), [], Fiddle::TYPE_VOID).call'])
+  end
+
+  def test_darwin_segv_in_syscall
+    assert_darwin_vm_dump_works('-e1.times{Process.kill :SEGV,$$}')
+  end
+
+  def test_darwin_invalid_access
+    assert_darwin_vm_dump_works(['-rfiddle', '-eFiddle.dlunwrap(100).class'])
+  end
+end