gcc/testsuite/gcc.dg/plugin/gil-1.c

/* { dg-do compile } */
/* { dg-options "-fanalyzer" } */

#include "gil.h"

void test_1 (void)
{
  Py_BEGIN_ALLOW_THREADS
  Py_END_ALLOW_THREADS
}

void test_2 (PyObject *obj)
{
  Py_BEGIN_ALLOW_THREADS /* { dg-message "releasing the GIL here" } */

  Py_INCREF (obj); /* { dg-warning "use of PyObject '\\*obj' without the GIL" } */
  Py_DECREF (obj);

  Py_END_ALLOW_THREADS
}

void test_3 (PyObject *obj)
{
  Py_BEGIN_ALLOW_THREADS /* { dg-message "releasing the GIL here" } */

  Py_BEGIN_ALLOW_THREADS /* { dg-warning "nested usage of 'Py_BEGIN_ALLOW_THREADS'" } */
  Py_END_ALLOW_THREADS

  Py_END_ALLOW_THREADS
}

void test_4 (PyObject *obj)
{
  /* These aren't nested, so should be OK.  */
  Py_BEGIN_ALLOW_THREADS
  Py_END_ALLOW_THREADS

  Py_BEGIN_ALLOW_THREADS
  Py_END_ALLOW_THREADS
}

/* Interprocedural example of erroneously nested usage.  */

static void  __attribute__((noinline))
called_by_test_5 (void)
{
  Py_BEGIN_ALLOW_THREADS /* { dg-warning "nested usage of 'Py_BEGIN_ALLOW_THREADS'" } */
  Py_END_ALLOW_THREADS
}

void test_5 (PyObject *obj)
{
  Py_BEGIN_ALLOW_THREADS /* { dg-message "releasing the GIL here" } */
  called_by_test_5 ();
  Py_END_ALLOW_THREADS
}

/* Interprocedural example of bogusly using a PyObject outside of GIL.  */

static void  __attribute__((noinline))
called_by_test_6 (PyObject *obj)
{
  Py_INCREF (obj); /* { dg-warning "use of PyObject '\\*obj' without the GIL" } */
  Py_DECREF (obj);
}

void test_6 (PyObject *obj)
{
  Py_BEGIN_ALLOW_THREADS /* { dg-message "releasing the GIL here" } */
  called_by_test_6 (obj);
  Py_END_ALLOW_THREADS
}

extern void called_by_test_7 (PyObject *obj);

void test_7 (PyObject *obj)
{
  Py_BEGIN_ALLOW_THREADS /* { dg-message "releasing the GIL here" } */
  called_by_test_7 (obj); /* { dg-warning "use of PyObject as argument 1 of 'called_by_test_7' without the GIL" } */
  Py_END_ALLOW_THREADS
}

typedef void (*callback_t) (PyObject *);

void test_8 (PyObject *obj, callback_t cb)
{
  Py_BEGIN_ALLOW_THREADS /* { dg-message "releasing the GIL here" } */
  cb (obj); /* { dg-warning "use of PyObject as argument 1 of call without the GIL" } */
  Py_END_ALLOW_THREADS
}