[v2] jit: avoid calloc() poisoning on musl [PR106102]

  From: Sergei Trofimovich <siarheit@google.com>

On musl <pthread.h> uses calloc() (via <sched.h>). jit/ includes
it directly and exposes use of poisoned calloc():

    /build/build/./prev-gcc/xg++ ... ../../gcc-13-20220626/gcc/jit/jit-playback.cc
    make[3]: *** [Makefile:1143: jit/libgccjit.o] Error 1
    make[3]: *** Waiting for unfinished jobs....
    In file included from /<<NIX>>/musl-1.2.3-dev/include/pthread.h:30,
                     from ../../gcc-13-20220626/gcc/jit/jit-playback.cc:44:
    /<<NIX>>/musl-1.2.3-dev/include/sched.h:84:7: error: attempt to use poisoned "calloc"
       84 | void *calloc(size_t, size_t);
          |       ^
    /<<NIX>>/musl-1.2.3-dev/include/sched.h:124:36: error: attempt to use poisoned "calloc"
      124 | #define CPU_ALLOC(n) ((cpu_set_t *)calloc(1,CPU_ALLOC_SIZE(n)))
          |                                    ^

The change moves <pthread.h> inclusion to "system.h" under new
INCLUDE_PTHREAD_H guard and uses this mechanism in libgccjit.

gcc/

	PR c++/106102
	* system.h: Introduce INCLUDE_PTHREAD_H macros to include <pthread.h>.

gcc/jit/

	PR c++/106102
	* jit-playback.cc: Include <pthread.h> via "system.h" to avoid calloc()
	poisoning.
	* jit-recording.cc: Ditto.
	* libgccjit.cc: Ditto.
---
 gcc/jit/jit-playback.cc  | 3 +--
 gcc/jit/jit-recording.cc | 2 +-
 gcc/jit/libgccjit.cc     | 2 +-
 gcc/system.h             | 4 ++++
 4 files changed, 7 insertions(+), 4 deletions(-)
  

> Am 28.06.2022 um 23:06 schrieb Sergei Trofimovich <slyich@gmail.com>:
> 
> From: Sergei Trofimovich <siarheit@google.com>
> 
> On musl <pthread.h> uses calloc() (via <sched.h>). jit/ includes
> it directly and exposes use of poisoned calloc():
> 
>    /build/build/./prev-gcc/xg++ ... ../../gcc-13-20220626/gcc/jit/jit-playback.cc
>    make[3]: *** [Makefile:1143: jit/libgccjit.o] Error 1
>    make[3]: *** Waiting for unfinished jobs....
>    In file included from /<<NIX>>/musl-1.2.3-dev/include/pthread.h:30,
>                     from ../../gcc-13-20220626/gcc/jit/jit-playback.cc:44:
>    /<<NIX>>/musl-1.2.3-dev/include/sched.h:84:7: error: attempt to use poisoned "calloc"
>       84 | void *calloc(size_t, size_t);
>          |       ^
>    /<<NIX>>/musl-1.2.3-dev/include/sched.h:124:36: error: attempt to use poisoned "calloc"
>      124 | #define CPU_ALLOC(n) ((cpu_set_t *)calloc(1,CPU_ALLOC_SIZE(n)))
>          |                                    ^
> 
> The change moves <pthread.h> inclusion to "system.h" under new
> INCLUDE_PTHREAD_H guard and uses this mechanism in libgccjit.

Ok,

Thanks,
Richard 

> gcc/
> 
>    PR c++/106102
>    * system.h: Introduce INCLUDE_PTHREAD_H macros to include <pthread.h>.
> 
> gcc/jit/
> 
>    PR c++/106102
>    * jit-playback.cc: Include <pthread.h> via "system.h" to avoid calloc()
>    poisoning.
>    * jit-recording.cc: Ditto.
>    * libgccjit.cc: Ditto.
> ---
> gcc/jit/jit-playback.cc  | 3 +--
> gcc/jit/jit-recording.cc | 2 +-
> gcc/jit/libgccjit.cc     | 2 +-
> gcc/system.h             | 4 ++++
> 4 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/gcc/jit/jit-playback.cc b/gcc/jit/jit-playback.cc
> index 6be6bdf8dea..79714132b91 100644
> --- a/gcc/jit/jit-playback.cc
> +++ b/gcc/jit/jit-playback.cc
> @@ -19,6 +19,7 @@ along with GCC; see the file COPYING3.  If not see
> <http://www.gnu.org/licenses/>.  */
> 
> #include "config.h"
> +#define INCLUDE_PTHREAD_H
> #include "system.h"
> #include "coretypes.h"
> #include "target.h"
> @@ -41,8 +42,6 @@ along with GCC; see the file COPYING3.  If not see
> #include "diagnostic.h"
> #include "stmt.h"
> 
> -#include <pthread.h>
> -
> #include "jit-playback.h"
> #include "jit-result.h"
> #include "jit-builtins.h"
> diff --git a/gcc/jit/jit-recording.cc b/gcc/jit/jit-recording.cc
> index 697dee66e73..f78daed2d71 100644
> --- a/gcc/jit/jit-recording.cc
> +++ b/gcc/jit/jit-recording.cc
> @@ -19,13 +19,13 @@ along with GCC; see the file COPYING3.  If not see
> <http://www.gnu.org/licenses/>.  */
> 
> #include "config.h"
> +#define INCLUDE_PTHREAD_H
> #include "system.h"
> #include "coretypes.h"
> #include "tm.h"
> #include "pretty-print.h"
> #include "toplev.h"
> 
> -#include <pthread.h>
> 
> #include "jit-builtins.h"
> #include "jit-recording.h"
> diff --git a/gcc/jit/libgccjit.cc b/gcc/jit/libgccjit.cc
> index 0e76097b4ba..ca862662777 100644
> --- a/gcc/jit/libgccjit.cc
> +++ b/gcc/jit/libgccjit.cc
> @@ -19,12 +19,12 @@ along with GCC; see the file COPYING3.  If not see
> <http://www.gnu.org/licenses/>.  */
> 
> #include "config.h"
> +#define INCLUDE_PTHREAD_H
> #include "system.h"
> #include "coretypes.h"
> #include "timevar.h"
> #include "typed-splay-tree.h"
> #include "cppbuiltin.h"
> -#include <pthread.h>
> 
> #include "libgccjit.h"
> #include "jit-recording.h"
> diff --git a/gcc/system.h b/gcc/system.h
> index 67158b70c78..f8d42ff6815 100644
> --- a/gcc/system.h
> +++ b/gcc/system.h
> @@ -753,6 +753,10 @@ extern int vsnprintf (char *, size_t, const char *, va_list);
> #endif
> #endif
> 
> +#ifdef INCLUDE_PTHREAD_H
> +#include <pthread.h>
> +#endif
> +
> #ifdef INCLUDE_ISL
> #ifdef HAVE_isl
> #include <isl/options.h>
> -- 
> 2.36.1
>