openmp/runtime/test/tasking/bug_nested_proxy_task.c

   1 // RUN: %libomp-compile-and-run
   2 // The runtime currently does not get dependency information from GCC.
   3 // UNSUPPORTED: gcc
   4
   5 // Very flaky on openmp-clang-x86_64-linux-debian.
   6 // https://bugs.llvm.org/show_bug.cgi?id=45397
   7 // UNSUPPORTED: linux
   8
   9 #include <stdint.h>
  10 #include <stdio.h>
  11 #include <omp.h>
  12 #include "omp_testsuite.h"
  13 #include "omp_my_sleep.h"
  14
  15 /*
  16  With task dependencies one can generate proxy tasks from an explicit task
  17  being executed by a serial task team. The OpenMP runtime library didn't
  18  expect that and tries to free the explicit task that is the parent of the
  19  proxy task still working in background. It therefore has incomplete children
  20  which triggers a debugging assertion.
  21 */
  22
  23 // Compiler-generated code (emulation)
  24 typedef intptr_t kmp_intptr_t;
  25 typedef int32_t kmp_int32;
  26 typedef uint8_t kmp_uint8;
  27
  28 typedef char bool;
  29
  30 // These structs need to match the implementation within libomp, in kmp.h.
  31
  32 typedef struct ident {
  33     kmp_int32 reserved_1;   /**<  might be used in Fortran; see above  */
  34     kmp_int32 flags;        /**<  also f.flags; KMP_IDENT_xxx flags; KMP_IDENT_KMPC identifies this union member  */
  35     kmp_int32 reserved_2;   /**<  not really used in Fortran any more; see above */
  36 #if USE_ITT_BUILD
  37                             /*  but currently used for storing region-specific ITT */
  38                             /*  contextual information. */
  39 #endif /* USE_ITT_BUILD */
  40     kmp_int32 reserved_3;   /**< source[4] in Fortran, do not use for C++  */
  41     char const *psource;    /**< String describing the source location.
  42                             The string is composed of semi-colon separated fields which describe the source file,
  43                             the function and a pair of line numbers that delimit the construct.
  44                              */
  45 } ident_t;
  46
  47 typedef struct kmp_depend_info {
  48      kmp_intptr_t               base_addr;
  49      size_t                     len;
  50      union {
  51         kmp_uint8 flag; // flag as an unsigned char
  52         struct { // flag as a set of 8 bits
  53             unsigned in : 1;
  54             unsigned out : 1;
  55             unsigned mtx : 1;
  56             unsigned set : 1;
  57             unsigned unused : 3;
  58             unsigned all : 1;
  59         } flags;
  60      };
  61 } kmp_depend_info_t;
  62
  63 struct kmp_task;
  64 typedef kmp_int32 (* kmp_routine_entry_t)( kmp_int32, struct kmp_task * );
  65
  66 typedef struct kmp_task {                   /* GEH: Shouldn't this be aligned somehow? */
  67     void *              shareds;            /**< pointer to block of pointers to shared vars   */
  68     kmp_routine_entry_t routine;            /**< pointer to routine to call for executing task */
  69     kmp_int32           part_id;            /**< part id for the task                          */
  70 } kmp_task_t;
  71
  72 #ifdef __cplusplus
  73 extern "C" {
  74 #endif
  75 kmp_int32  __kmpc_global_thread_num  ( ident_t * );
  76 kmp_task_t*
  77 __kmpc_omp_task_alloc( ident_t *loc_ref, kmp_int32 gtid, kmp_int32 flags,
  78                        size_t sizeof_kmp_task_t, size_t sizeof_shareds,
  79                        kmp_routine_entry_t task_entry );
  80 void __kmpc_proxy_task_completed_ooo ( kmp_task_t *ptask );
  81 kmp_int32 __kmpc_omp_task_with_deps ( ident_t *loc_ref, kmp_int32 gtid, kmp_task_t * new_task,
  82                                       kmp_int32 ndeps, kmp_depend_info_t *dep_list,
  83                                       kmp_int32 ndeps_noalias, kmp_depend_info_t *noalias_dep_list );
  84 kmp_int32
  85 __kmpc_omp_task( ident_t *loc_ref, kmp_int32 gtid, kmp_task_t * new_task );
  86 #ifdef __cplusplus
  87 }
  88 #endif
  89
  90 void *target(void *task)
  91 {
  92     my_sleep( 0.1 );
  93     __kmpc_proxy_task_completed_ooo((kmp_task_t*) task);
  94     return NULL;
  95 }
  96
  97 pthread_t target_thread;
  98
  99 // User's code
 100 int task_entry(kmp_int32 gtid, kmp_task_t *task)
 101 {
 102     pthread_create(&target_thread, NULL, &target, task);
 103     return 0;
 104 }
 105
 106 int main()
 107 {
 108     int dep;
 109
 110 #pragma omp taskgroup
 111 {
 112 /*
 113  *  Corresponds to:
 114     #pragma omp target nowait depend(out: dep)
 115     {
 116         my_sleep( 0.1 );
 117     }
 118 */
 119     kmp_depend_info_t dep_info = { 0 };
 120     dep_info.base_addr = (kmp_intptr_t) &dep;
 121     dep_info.len = sizeof(int);
 122     // out = inout per spec and runtime expects this
 123     dep_info.flags.in = 1;
 124     dep_info.flags.out = 1;
 125
 126     kmp_int32 gtid = __kmpc_global_thread_num(NULL);
 127     kmp_task_t *proxy_task = __kmpc_omp_task_alloc(NULL,gtid,17,sizeof(kmp_task_t),0,&task_entry);
 128     __kmpc_omp_task_with_deps(NULL,gtid,proxy_task,1,&dep_info,0,NULL);
 129
 130     #pragma omp task depend(in: dep)
 131     {
 132 /*
 133  *      Corresponds to:
 134         #pragma omp target nowait
 135         {
 136             my_sleep( 0.1 );
 137         }
 138 */
 139         kmp_task_t *nested_proxy_task = __kmpc_omp_task_alloc(NULL,gtid,17,sizeof(kmp_task_t),0,&task_entry);
 140         __kmpc_omp_task(NULL,gtid,nested_proxy_task);
 141     }
 142 }
 143
 144     // only check that it didn't crash
 145     return 0;
 146 }