Ruby » Ruby master

$SAFE as a process global state. [Feature #14250]

• vm_core.h (rb_vm_t): move rb_execution_context_t::safe_level to
  rb_vm_t::safe_level_ because $SAFE is a process (VM) global state.

• vm_core.h (rb_proc_t): remove rb_proc_t::safe_level because Proc
  objects don't need to keep $SAFE at the creation.
  Also make is_from_method and is_lambda as 1 bit fields.

• cont.c (cont_restore_thread): no need to keep $SAFE for Continuation.

• eval.c (ruby_cleanup): use rb_set_safe_level_force() instead of access
  vm->safe_level_ directly.

• eval_jump.c: End procs END{} doesn't keep $SAFE.

• proc.c (proc_dup): removed and introduce rb_proc_dup in vm.c.

• safe.c (rb_set_safe_level): don't check $SAFE 1 -> 0 changes.

• safe.c (safe_setter): use rb_set_safe_level().

• thread.c (rb_thread_safe_level): Thread#safe_level returns $SAFE.
  It should be obsolete.

• transcode.c (load_transcoder_entry): rb_safe_level() only returns
  0 or 1 so that this check is not needed.

• vm.c (vm_proc_create_from_captured): don't need to keep $SAFE for Proc.

• vm.c (rb_proc_create): renamed to proc_create.

• vm.c (rb_proc_dup): moved from proc.c.

• vm.c (vm_invoke_proc): do not need to set and restore $SAFE
  for Proc#call.

• vm_eval.c (rb_eval_cmd): rename a local variable to represent clearer
  meaning.

• lib/drb/drb.rb: restore $SAFE.

• lib/erb.rb: restore $SAFE, too.

• test/lib/leakchecker.rb: check $SAFE == 0 at the end of tests.

• test/rubygems/test_gem.rb: do not set $SAFE = 1.

• bootstraptest/test_proc.rb: catch up this change.

• spec/ruby/optional/capi/string_spec.rb: ditto.

• test/bigdecimal/test_bigdecimal.rb: ditto.

• test/fiddle/test_func.rb: ditto.

• test/fiddle/test_handle.rb: ditto.

• test/net/imap/test_imap_response_parser.rb: ditto.

• test/pathname/test_pathname.rb: ditto.

• test/readline/test_readline.rb: ditto.

• test/ruby/test_file.rb: ditto.

• test/ruby/test_optimization.rb: ditto.

• test/ruby/test_proc.rb: ditto.

• test/ruby/test_require.rb: ditto.

• test/ruby/test_thread.rb: ditto.

• test/rubygems/test_gem_specification.rb: ditto.

• test/test_tempfile.rb: ditto.

• test/test_tmpdir.rb: ditto.

• test/win32ole/test_win32ole.rb: ditto.

• test/win32ole/test_win32ole_event.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61510 b2dd03c8-39d4-4d8f-98ff-823fe69b080e