https://git.ruby-lang.org/ruby.git/commit/?id=11512a80fc

From 11512a80fce8bfac3adf7038e9d9e3839e5cbbfb Mon Sep 17 00:00:00 2001
From: Aaron Patterson <tenderlove@r...>
Date: Thu, 21 Jan 2021 14:05:11 -0800
Subject: add a helper script for ujit disasm

---
 misc/ujit_disasm.rb | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 misc/ujit_disasm.rb

diff --git a/misc/ujit_disasm.rb b/misc/ujit_disasm.rb
new file mode 100644
index 0000000000..0e54f952c9
--- /dev/null
+++ b/misc/ujit_disasm.rb
@@ -0,0 +1,34 @@ https://github.com/ruby/ruby/blob/trunk/misc/ujit_disasm.rb#L1
+begin
+require "crabstone"
+require "stringio"
+
+module UJIT
+  def self.disasm(iseq)
+    blocks = UJIT.blocks_for(iseq)
+    return if blocks.empty?
+
+    io = StringIO.new
+
+    cs = Crabstone::Disassembler.new(Crabstone::ARCH_X86, Crabstone::MODE_64)
+
+    io.puts iseq.disasm
+
+    blocks.sort_by(&:address).reverse.each do |block|
+      io.puts "== ISEQ RANGE: #{block.iseq_start_index} -> #{block.iseq_end_index} ".ljust(80, "=")
+      cs.disasm(block.code, 0).each do |i|
+        io.printf(
+          "\t0x%<address>x:\t%<instruction>s\t%<details>s\n",
+          address: i.address,
+          instruction: i.mnemonic,
+          details: i.op_str
+        )
+      end
+    end
+    io.string
+  end
+end
+rescue
+  puts "Please install crabstone like this:"
+  puts "  $ brew install capstone"
+  puts "  $ gem install capstone"
+end
-- 
cgit v1.2.1


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