example.cr

require "./v8"
require "./fly/*"
require "http/server"

iso = V8::Isolate.new
ctx = V8::Context.new(iso)

cfn = V8::CrystalFunction.new(ctx, "blah", V8::FunctionCallback.new do |info|
  info.args.each do |a|
    puts "arg: '#{a.to_s}'"
  end
  
  nil
end)

global = ctx.global
global.set("addEventListener", cfn)

s = File.read("script.js").to_s
ctx.eval(s)

output

initing iso
init iso
got isolate in ISOLATE_SCOPE
init ctx
got isolate in ISOLATE_SCOPE
got isolate in ISOLATE_SCOPE
got isolate in ISOLATE_SCOPE
in fn, sizeof info:
8
to s: fetch
pointer of arg 0 is 0x7f82c450bdb0
to s: function (event) {
  'blah';
  event.respondWith(body)
}
pointer of arg 1 is 0x7f82c450c580
sizeof argv 16
sizeof ret 16
sizeof parsed thing: 16
initial pointer: Pointer(LibV8::PersistentValue)@0x7fff503995c0
arg 0
Pointer(Void)@0x7fff00000002
arg 1
Pointer(Void)@0x7fff503995c0
Slice(LibV8::PersistentValue)
16
got isolate in ISOLATE_SCOPE
got my value scope, value 0x7fff00000002
Received signal 11 SEGV_MAPERR 7fff00000002

==== C stack trace ===============================

 [0x00011010f7d4]
 [0x7fffccffab3a]
 [0x000000000000]
 [0x00010f8e483c]
 [0x00010f876191]
 [0x00010f8759d9]
 [0x00010f92a701]
 [0x00010f981c3c]
 [0x00010f9812b3]
 [0x3bdda93040bd]
[end of stack trace]
Program exited because of a segmentation fault (11)