1 files changed, 178 insertions, 0 deletions
diff --git a/spec/ruby/optional/capi/ext/gc_spec.c b/spec/ruby/optional/capi/ext/gc_spec.c
new file mode 100644
index 0000000000..0baa114d7b
--- /dev/null
+++ b/spec/ruby/optional/capi/ext/gc_spec.c
@@ -0,0 +1,178 @@
+#include "ruby.h"
+#include "rubyspec.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+VALUE registered_tagged_value;
+VALUE registered_reference_value;
+VALUE registered_before_rb_gc_register_address;
+VALUE registered_before_rb_global_variable_string;
+VALUE registered_before_rb_global_variable_bignum;
+VALUE registered_before_rb_global_variable_float;
+VALUE registered_after_rb_global_variable_string;
+VALUE registered_after_rb_global_variable_bignum;
+VALUE registered_after_rb_global_variable_float;
+VALUE rb_gc_register_address_outside_init;
+
+VALUE rb_gc_register_mark_object_not_referenced_float;
+
+static VALUE spec_RB_GC_GUARD_keep_alive(VALUE self, VALUE array_with_string) {
+  VALUE string = rb_ary_entry(array_with_string, 0);
+  char* ptr = RSTRING_PTR(string);
+  // Without the RB_GC_GUARD(string) below, string could be GC'd, and ptr become invalid
+  rb_gc();
+  char copy[4];
+  copy[0] = ptr[0];
+  copy[1] = ptr[1];
+  copy[2] = ptr[2];
+  copy[3] = '\0';
+  RB_GC_GUARD(string);
+  return rb_str_new_cstr(copy);
+}
+
+static VALUE spec_RB_GC_GUARD(VALUE self, VALUE object) {
+  RB_GC_GUARD(object);
+  return object;
+}
+
+static VALUE spec_RB_GC_GUARD_raw(VALUE self, VALUE number) {
+  long l = NUM2LONG(number);
+  VALUE value = (VALUE) l;
+  RB_GC_GUARD(value);
+  return Qnil;
+}
+
+static VALUE registered_tagged_address(VALUE self) {
+  return registered_tagged_value;
+}
+
+static VALUE registered_reference_address(VALUE self) {
+  return registered_reference_value;
+}
+
+static VALUE get_registered_before_rb_gc_register_address(VALUE self) {
+  return registered_before_rb_gc_register_address;
+}
+
+static VALUE get_registered_before_rb_global_variable_string(VALUE self) {
+  return registered_before_rb_global_variable_string;
+}
+
+static VALUE get_registered_before_rb_global_variable_bignum(VALUE self) {
+  return registered_before_rb_global_variable_bignum;
+}
+
+static VALUE get_registered_before_rb_global_variable_float(VALUE self) {
+  return registered_before_rb_global_variable_float;
+}
+
+static VALUE get_registered_after_rb_global_variable_string(VALUE self) {
+  return registered_after_rb_global_variable_string;
+}
+
+static VALUE get_registered_after_rb_global_variable_bignum(VALUE self) {
+  return registered_after_rb_global_variable_bignum;
+}
+
+static VALUE get_registered_after_rb_global_variable_float(VALUE self) {
+  return registered_after_rb_global_variable_float;
+}
+
+static VALUE gc_spec_rb_gc_register_address(VALUE self) {
+  rb_gc_register_address(&rb_gc_register_address_outside_init);
+  rb_gc_register_address_outside_init = rb_str_new_cstr("rb_gc_register_address() outside Init_");
+  return rb_gc_register_address_outside_init;
+}
+
+static VALUE gc_spec_rb_gc_unregister_address(VALUE self) {
+  rb_gc_unregister_address(&rb_gc_register_address_outside_init);
+  return Qnil;
+}
+
+static VALUE gc_spec_rb_gc_enable(VALUE self) {
+  return rb_gc_enable();
+}
+
+static VALUE gc_spec_rb_gc_disable(VALUE self) {
+  return rb_gc_disable();
+}
+
+static VALUE gc_spec_rb_gc(VALUE self) {
+  rb_gc();
+  return Qnil;
+}
+
+static VALUE gc_spec_rb_gc_latest_gc_info(VALUE self, VALUE hash_or_key) {
+  return rb_gc_latest_gc_info(hash_or_key);
+}
+
+static VALUE gc_spec_rb_gc_adjust_memory_usage(VALUE self, VALUE diff) {
+  rb_gc_adjust_memory_usage(NUM2SSIZET(diff));
+  return Qnil;
+}
+
+static VALUE gc_spec_rb_gc_register_mark_object(VALUE self, VALUE obj) {
+  rb_gc_register_mark_object(obj);
+  return Qnil;
+}
+
+static VALUE gc_spec_rb_gc_register_mark_object_not_referenced_float(VALUE self) {
+  return rb_gc_register_mark_object_not_referenced_float;
+}
+
+void Init_gc_spec(void) {
+  VALUE cls = rb_define_class("CApiGCSpecs", rb_cObject);
+
+  rb_gc_register_address(&registered_tagged_value);
+  rb_gc_register_address(&registered_reference_value);
+  rb_gc_register_address(&registered_before_rb_gc_register_address);
+  rb_global_variable(&registered_before_rb_global_variable_string);
+  rb_global_variable(&registered_before_rb_global_variable_bignum);
+  rb_global_variable(&registered_before_rb_global_variable_float);
+
+  registered_tagged_value    = INT2NUM(10);
+  registered_reference_value = rb_str_new2("Globally registered data");
+  registered_before_rb_gc_register_address = rb_str_new_cstr("registered before rb_gc_register_address()");
+
+  registered_before_rb_global_variable_string = rb_str_new_cstr("registered before rb_global_variable()");
+  registered_before_rb_global_variable_bignum = LL2NUM(INT64_MAX);
+  registered_before_rb_global_variable_float = DBL2NUM(3.14);
+
+  registered_after_rb_global_variable_string = rb_str_new_cstr("registered after rb_global_variable()");
+  rb_global_variable(&registered_after_rb_global_variable_string);
+  registered_after_rb_global_variable_bignum = LL2NUM(INT64_MAX);
+  rb_global_variable(&registered_after_rb_global_variable_bignum);
+  registered_after_rb_global_variable_float = DBL2NUM(6.28);
+  rb_global_variable(&registered_after_rb_global_variable_float);
+
+  rb_gc_register_mark_object_not_referenced_float = DBL2NUM(1.61);
+  rb_gc_register_mark_object(rb_gc_register_mark_object_not_referenced_float);
+
+  rb_define_method(cls, "RB_GC_GUARD_keep_alive", spec_RB_GC_GUARD_keep_alive, 1);
+  rb_define_method(cls, "RB_GC_GUARD", spec_RB_GC_GUARD, 1);
+  rb_define_method(cls, "RB_GC_GUARD_raw", spec_RB_GC_GUARD_raw, 1);
+  rb_define_method(cls, "registered_tagged_address", registered_tagged_address, 0);
+  rb_define_method(cls, "registered_reference_address", registered_reference_address, 0);
+  rb_define_method(cls, "registered_before_rb_gc_register_address", get_registered_before_rb_gc_register_address, 0);
+  rb_define_method(cls, "registered_before_rb_global_variable_string", get_registered_before_rb_global_variable_string, 0);
+  rb_define_method(cls, "registered_before_rb_global_variable_bignum", get_registered_before_rb_global_variable_bignum, 0);
+  rb_define_method(cls, "registered_before_rb_global_variable_float", get_registered_before_rb_global_variable_float, 0);
+  rb_define_method(cls, "registered_after_rb_global_variable_string", get_registered_after_rb_global_variable_string, 0);
+  rb_define_method(cls, "registered_after_rb_global_variable_bignum", get_registered_after_rb_global_variable_bignum, 0);
+  rb_define_method(cls, "registered_after_rb_global_variable_float", get_registered_after_rb_global_variable_float, 0);
+  rb_define_method(cls, "rb_gc_register_address", gc_spec_rb_gc_register_address, 0);
+  rb_define_method(cls, "rb_gc_unregister_address", gc_spec_rb_gc_unregister_address, 0);
+  rb_define_method(cls, "rb_gc_enable", gc_spec_rb_gc_enable, 0);
+  rb_define_method(cls, "rb_gc_disable", gc_spec_rb_gc_disable, 0);
+  rb_define_method(cls, "rb_gc", gc_spec_rb_gc, 0);
+  rb_define_method(cls, "rb_gc_adjust_memory_usage", gc_spec_rb_gc_adjust_memory_usage, 1);
+  rb_define_method(cls, "rb_gc_register_mark_object", gc_spec_rb_gc_register_mark_object, 1);
+  rb_define_method(cls, "rb_gc_register_mark_object_not_referenced_float", gc_spec_rb_gc_register_mark_object_not_referenced_float, 0);
+  rb_define_method(cls, "rb_gc_latest_gc_info", gc_spec_rb_gc_latest_gc_info, 1);
+}
+
+#ifdef __cplusplus
+}
+#endif