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fix return in toplevel rescue/ensure

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* compile.c (iseq_compile_each0): throw TAG_RETURN at return in
  toplevel rescue/ensure to adjust VM stack properly.
  [ruby-core:81777] [Bug #13682]

* vm_insnhelper.c (vm_throw_start): allow return in toplevel
  rescue/ensure.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59183 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-06-27 06:57:34 +00:00
parent c95cbf6aab
commit 1474acff3c
4 changed files with 39 additions and 4 deletions
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16
compile.c
View file

@ -5657,15 +5657,23 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, NODE *node, int popp
if (is) {
enum iseq_type type = is->body->type;
const rb_iseq_t *parent_iseq = is->body->parent_iseq;
enum iseq_type parent_type = parent_iseq ? parent_iseq->body->type : type;
enum iseq_type parent_type;
if (type == ISEQ_TYPE_TOP || type == ISEQ_TYPE_MAIN ||
((type == ISEQ_TYPE_RESCUE || type == ISEQ_TYPE_ENSURE) &&
(parent_type == ISEQ_TYPE_TOP || parent_type == ISEQ_TYPE_MAIN))) {
if (type == ISEQ_TYPE_TOP || type == ISEQ_TYPE_MAIN) {
ADD_ADJUST(ret, line, 0);
ADD_INSN(ret, line, putnil);
ADD_INSN(ret, line, leave);
}
else if ((type == ISEQ_TYPE_RESCUE || type == ISEQ_TYPE_ENSURE) &&
parent_iseq &&
((parent_type = parent_iseq->body->type) == ISEQ_TYPE_TOP ||
parent_type == ISEQ_TYPE_MAIN)) {
ADD_INSN(ret, line, putnil);
ADD_INSN1(ret, line, throw, INT2FIX(TAG_RETURN));
if (popped) {
ADD_INSN(ret, line, pop);
}
}
else {
LABEL *splabel = 0;

10
test/ruby/test_eval.rb
View file

@ -525,4 +525,14 @@ class TestEval < Test::Unit::TestCase
b.eval('yield')
}, '[Bug #10368]'
end
def test_return_in_eval_proc
x = proc {eval("return :ng")}
assert_raise(LocalJumpError) {x.call}
end
def test_return_in_eval_lambda
x = lambda {eval("return :ok")}
assert_equal(:ok, x.call)
end
end

1
test/ruby/test_syntax.rb
View file

@ -976,6 +976,7 @@ eom
return 1; raise
"#{return}"
raise((return; "should not raise"))
begin raise; ensure return; end; self
end;
all_assertions(feature4840) do |a|
code.each_line do |s|

16
vm_insnhelper.c
View file

@ -1126,6 +1126,7 @@ vm_throw_start(rb_thread_t *const th, rb_control_frame_t *const reg_cfp, enum ru
const VALUE *current_ep = GET_EP();
const VALUE *target_lep = VM_EP_LEP(current_ep);
int in_class_frame = 0;
int toplevel = 1;
escape_cfp = reg_cfp;
while (escape_cfp < eocfp) {
@ -1144,6 +1145,7 @@ vm_throw_start(rb_thread_t *const th, rb_control_frame_t *const reg_cfp, enum ru
if (lep == target_lep) {
if (VM_FRAME_LAMBDA_P(escape_cfp)) {
toplevel = 0;
if (in_class_frame) {
/* lambda {class A; ... return ...; end} */
goto valid_return;
@ -1160,6 +1162,20 @@ vm_throw_start(rb_thread_t *const th, rb_control_frame_t *const reg_cfp, enum ru
}
}
}
else if (VM_FRAME_RUBYFRAME_P(escape_cfp)) {
switch (escape_cfp->iseq->body->type) {
case ISEQ_TYPE_TOP:
case ISEQ_TYPE_MAIN:
if (toplevel) goto valid_return;
break;
case ISEQ_TYPE_EVAL:
case ISEQ_TYPE_CLASS:
toplevel = 0;
break;
default:
break;
}
}
}
if (escape_cfp->ep == target_lep && escape_cfp->iseq->body->type == ISEQ_TYPE_METHOD) {