ruby-core

Issue #9692 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.0.0: REQUIRED, 2.1: REQUIRED to 2.0.0: REQUIRED, 2.1: DONE

r45503, r45504, r45508, r45509 and r47275 were backported into `ruby_2_1` branch at r47276.

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Bug #9692: __builtin_longjmp is called with a value greater than 1 (GCC compilation error)
https://bugs.ruby-lang.org/issues/9692#change-48476

* Author: Martin Liška
* Status: Closed
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: 2.0.0-p353
* Backport: 2.0.0: REQUIRED, 2.1: DONE
----------------------------------------
Hello,
    during testing of LTO on a gentoo machine:
Linux qemubox 3.12.13-gentoo #2 SMP Fri Mar 28 22:30:38 Local time zone must be set--see zic  x86_64 Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz GenuineIntel GNU/Linux

Configure detects:

~~~
checking for __builtin_setjmp... yes
checking for setjmp type... __builtin_setjmp
~~~

Problem is that ruby calls longjmp with value greater than 1, e.g. `TAG_RAISE` (0x6). With `-flto` compiler proves that `__builtin_longjmp` is always called with such a value and following errors are displayed:

~~~
eval.c: In function ‘rb_jump_tag’:
eval.c:668:5: error: ‘__builtin_longjmp’ second argument must be 1
     JUMP_TAG(tag);
     ^
thread.c: In function ‘rb_threadptr_to_kill’:
thread.c:1887:5: error: ‘__builtin_longjmp’ second argument must be 1
     TH_JUMP_TAG(th, TAG_FATAL);
     ^
vm.c: In function ‘vm_exec’:
vm.c:1413:3: error: ‘__builtin_longjmp’ second argument must be 1
   JUMP_TAG(state);
   ^
eval.c: In function ‘setup_exception’:
eval.c:437:34: error: ‘__builtin_longjmp’ second argument must be 1
  if (INTERNAL_EXCEPTION_P(mesg)) JUMP_TAG(TAG_FATAL);
                                  ^
eval.c:502:2: error: ‘__builtin_longjmp’ second argument must be 1
  JUMP_TAG(TAG_FATAL);
  ^
eval.c: In function ‘rb_raise_jump’:
eval.c:662:5: error: ‘__builtin_longjmp’ second argument must be 1
     JUMP_TAG(TAG_RAISE);
     ^
eval.c: In function ‘rb_longjmp’:
eval.c:521:5: error: ‘__builtin_longjmp’ second argument must be 1
     JUMP_TAG(tag);
     ^
gc.c: In function ‘rb_memerror’:
gc.c:3417:2: error: ‘__builtin_longjmp’ second argument must be 1
  JUMP_TAG(TAG_RAISE);
  ^
~~~

~~~
gcc --version:
gcc (GCC) 4.9.0 20140331 (experimental)
~~~


---Files--------------------------------
ruby-configure-builtin_longjmp.patch (573 Bytes)


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