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Bug #17643

closed

Ruby 3 embedded - no GC methods?

Added by cfis (Charlie Savage) about 3 years ago. Updated over 2 years ago.

Status:
Rejected
Target version:
-
ruby -v:
ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x64-mingw32]
[ruby-core:<unknown>]

Description

The following code works on Ruby 2.x, but not on Ruby 3.0.0.

// Initialize Ruby VM
int argc = 0;
char* argv = (char*)malloc(1);
argv[0] = 0;
char** pArgv = &argv;

ruby_sysinit(&argc, &pArgv);
ruby_init();
ruby_init_loadpath();

// Try to call GC.start
int state;
VALUE result = rb_eval_string_protect("GC.start", &state);
VALUE err = rb_errinfo();
VALUE rubyMessage = rb_funcall(err, rb_intern("message"), 0);
char* message = RSTRING_PTR(rubyMessage);

message is "undefined method `start' for GC:Module"

This is true for all the GC methods (stop, stress, etc). Note if you create a Ruby script that contains GC.start and run it using the Ruby interpreter all is well.

Is there some new special way Ruby 3 needs to be embedded?

Note I tested this on mingw, MSVC and gcc (Fedora). All the same. Like I said above, this code works fine on Ruby 2.7 and earlier.


Files

Screenshot 2021-04-02 013926.png (194 KB) Screenshot 2021-04-02 013926.png cfis (Charlie Savage), 04/02/2021 08:40 AM
Screenshot 2021-04-02 013926.png (194 KB) Screenshot 2021-04-02 013926.png cfis (Charlie Savage), 04/02/2021 08:40 AM
Screenshot 2021-04-02 013926.png (194 KB) Screenshot 2021-04-02 013926.png cfis (Charlie Savage), 04/02/2021 08:40 AM
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