From 7476be4defe09d951bdb28b2925be5b461baed5d Mon Sep 17 00:00:00 2001
From: ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 7 Dec 2015 19:01:29 +0000
Subject: * test/lib/iseq_loader_checker.rb: add iseq dumper/loader checker.  
 If you enable this checker (remove `#' in test/runner.rb),   you can see
 comparison results between an original iseq disassembed   result and dumped
 and loaded iseq disassembed result.

  There are several bugs around there, because of inexact stack depth
  calculation. Now, I leave these bugs because they are not critical
  and difficult to solve completely.

* test/runner.rb: require test/lib/iseq_loader_checker.rb but
  disabled at default (commented out).




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52926 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/lib/iseq_loader_checker.rb | 55 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 test/lib/iseq_loader_checker.rb

(limited to 'test/lib')

diff --git a/test/lib/iseq_loader_checker.rb b/test/lib/iseq_loader_checker.rb
new file mode 100644
index 0000000000..0c372ca638
--- /dev/null
+++ b/test/lib/iseq_loader_checker.rb
@@ -0,0 +1,55 @@
+
+require '-test-/iseq_load/iseq_load'
+require 'tempfile'
+
+class RubyVM::InstructionSequence
+  def disasm_if_possible
+    begin
+      self.disasm
+    rescue Encoding::CompatibilityError, EncodingError, SecurityError
+      nil
+    end
+  end
+
+  def self.compare_dump_and_load i1, dumper, loader
+    dump = dumper.call(i1)
+    return i1 unless dump
+    i2 = loader.call(dump)
+
+    # compare disassembled result
+    d1 = i1.disasm_if_possible
+    d2 = i2.disasm_if_possible
+
+    if d1 != d2
+      p i1
+      return
+
+      STDERR.puts "expected:"
+      STDERR.puts d1
+      STDERR.puts "actual:"
+      STDERR.puts d2
+
+      t1 = Tempfile.new("expected"); t1.puts d1; t1.close
+      t2 = Tempfile.new("actual"); t2.puts d2; t2.close
+      system("diff -u #{t1.path} #{t2.path}") # use diff if available
+      exit(1)
+    end
+    i2
+  end
+
+  def self.translate i1
+    # check to_a/load_iseq
+    i2 = compare_dump_and_load(i1,
+                               proc{|iseq|
+                                 ary = iseq.to_a
+                                 ary[9] == :top ? ary : nil
+                               },
+                               proc{|ary|
+                                 RubyVM::InstructionSequence.iseq_load(ary)
+                               })
+    # return value
+    i1
+  end
+end
+
+#require_relative 'x'; exit(1)
-- 
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