1 This patch was developed in house for Bug 21658934. Python PyObject_Free()

     2 implementation relies on being able to read memory that might not belong to

     3 the current buffer. When ADIHEAP is enabled, this is detected as a violation.

     4 Use an explicit nonfaulting load to ignore the ADI tag.

     5 

     6 This patch only works with Studio; one which supports gcc and

     7 Studio is being worked on with an intent to push it upstream.

     8 

     9 --- a/Objects/obmalloc.c        Thu Apr 14 10:33:32 2016 -0700

    10 +++ b/Objects/obmalloc.c        Thu Apr 14 10:38:55 2016 -0700

    11 @@ -428,6 +428,18 @@

    12  static int running_on_valgrind = -1;

    13  #endif

    14  

    15 +#ifdef __sparcv9

    16 +#include <vis.h>

    17 +/*

    18 + * Py_ADDRESS_IN_RANGE needs to access memory that might be arbitrarily

    19 + * tagged by an ADI aware allocator. The use of a nonfaulting load

    20 + * guarantees that the read will succeed.

    21 + */

    22 +#define POOL_INDEX(x)   __vis_ldswa_ASI_PNF(&(x))

    23 +#else   /* __sparcv9 */

    24 +#define POOL_INDEX(x)   (x)

    25 +#endif  /* __sparcv9 */

    26 +

    27  /* An object allocator for Python.

    28  

    29     Here is an introduction to the layers of the Python memory architecture,

    30 @@ -1115,7 +1127,7 @@

    31  variable.

    32  */

    33  #define Py_ADDRESS_IN_RANGE(P, POOL)                    \

    34 -    ((arenaindex_temp = (POOL)->arenaindex) < maxarenas &&              \

    35 +    ((arenaindex_temp = POOL_INDEX((POOL)->arenaindex)) < maxarenas && \

    36       (uptr)(P) - arenas[arenaindex_temp].address < (uptr)ARENA_SIZE && \

    37       arenas[arenaindex_temp].address != 0)

    38