3 files changed, 220 insertions, 0 deletions
diff --git a/ext/-test-/popen_deadlock/depend b/ext/-test-/popen_deadlock/depend
new file mode 100644
index 0000000000..0b8932e8b8
--- /dev/null
+++ b/ext/-test-/popen_deadlock/depend
@@ -0,0 +1,164 @@
+# AUTOGENERATED DEPENDENCIES START
+infinite_loop_dlsym.o: $(RUBY_EXTCONF_H)
+infinite_loop_dlsym.o: $(arch_hdrdir)/ruby/config.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/assert.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/assume.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/attributes.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/bool.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/gcc_version_since.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/inttypes.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/limits.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/long_long.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/stdalign.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/backward/2/stdarg.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/defines.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/intern.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/abi.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/anyargs.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/char.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/double.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/fixnum.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/gid_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/int.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/intptr_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/long.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/long_long.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/mode_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/off_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/pid_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/short.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/size_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/st_data_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/arithmetic/uid_t.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/assume.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/alloc_size.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/artificial.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/cold.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/const.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/constexpr.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/deprecated.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/diagnose_if.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/enum_extensibility.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/error.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/flag_enum.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/forceinline.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/format.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/maybe_unused.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/noalias.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/nodiscard.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/noexcept.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/noinline.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/nonnull.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/noreturn.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/packed_struct.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/pure.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/restrict.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/returns_nonnull.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/warning.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/attr/weakref.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/cast.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_is.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_is/apple.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_is/clang.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_is/gcc.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_is/intel.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_is/msvc.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_is/sunpro.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/compiler_since.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/config.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/constant_p.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rarray.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rbasic.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rbignum.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rclass.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rdata.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rfile.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rhash.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/robject.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rregexp.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rstring.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rstruct.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/core/rtypeddata.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/ctype.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/dllexport.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/dosish.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/error.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/eval.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/event.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/fl_type.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/gc.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/glob.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/globals.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/attribute.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/builtin.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/c_attribute.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/cpp_attribute.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/declspec_attribute.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/extension.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/feature.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/has/warning.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/array.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/bignum.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/class.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/compar.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/complex.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/cont.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/dir.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/enum.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/enumerator.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/error.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/eval.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/file.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/hash.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/io.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/load.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/marshal.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/numeric.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/object.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/parse.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/proc.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/process.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/random.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/range.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/rational.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/re.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/ruby.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/select.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/select/largesize.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/set.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/signal.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/sprintf.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/string.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/struct.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/thread.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/time.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/variable.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/intern/vm.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/interpreter.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/iterator.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/memory.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/method.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/module.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/newobj.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/scan_args.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/special_consts.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/static_assert.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/stdalign.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/stdbool.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/stdckdint.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/symbol.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/value.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/value_type.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/variable.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/warning_push.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/internal/xmalloc.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/missing.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/ruby.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/st.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/subst.h
+infinite_loop_dlsym.o: $(hdrdir)/ruby/thread.h
+infinite_loop_dlsym.o: infinite_loop_dlsym.c
+# AUTOGENERATED DEPENDENCIES END
diff --git a/ext/-test-/popen_deadlock/extconf.rb b/ext/-test-/popen_deadlock/extconf.rb
new file mode 100644
index 0000000000..6b6ee7a6b8
--- /dev/null
+++ b/ext/-test-/popen_deadlock/extconf.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: false
+case RUBY_PLATFORM
+when /solaris/i, /linux/i
+  $LDFLAGS << " -ldl"
+  create_makefile("-test-/popen_deadlock/infinite_loop_dlsym")
+end
diff --git a/ext/-test-/popen_deadlock/infinite_loop_dlsym.c b/ext/-test-/popen_deadlock/infinite_loop_dlsym.c
new file mode 100644
index 0000000000..1d95a7cc9a
--- /dev/null
+++ b/ext/-test-/popen_deadlock/infinite_loop_dlsym.c
@@ -0,0 +1,50 @@
+#include "ruby/ruby.h"
+#include "ruby/thread.h"
+#include <dlfcn.h>
+
+struct data_for_loop_dlsym {
+    const char *name;
+    volatile int stop;
+};
+
+static void*
+native_loop_dlsym(void *data)
+{
+    struct data_for_loop_dlsym *s = data;
+
+    while (!(s->stop)) {
+        dlsym(RTLD_DEFAULT, s->name);
+    }
+
+    return NULL;
+}
+
+static void
+ubf_for_loop_dlsym(void *data)
+{
+    struct data_for_loop_dlsym *s = data;
+
+    s->stop = 1;
+
+    return;
+}
+
+static VALUE
+loop_dlsym(VALUE self, VALUE name)
+{
+    struct data_for_loop_dlsym d;
+
+    d.stop = 0;
+    d.name = StringValuePtr(name);
+
+    rb_thread_call_without_gvl(native_loop_dlsym, &d,
+                               ubf_for_loop_dlsym, &d);
+
+    return self;
+}
+
+void
+Init_infinite_loop_dlsym(void)
+{
+    rb_define_method(rb_cThread, "__infinite_loop_dlsym__", loop_dlsym, 1);
+}