[Openmp-commits] [openmp] r243032 - Patch out a fatal assertion in OpenMP runtime until preconditions are met

Jonathan Peyton jonathan.l.peyton at intel.com
Thu Jul 23 11:58:37 PDT 2015

Author: jlpeyton
Date: Thu Jul 23 13:58:37 2015
New Revision: 243032

URL: http://llvm.org/viewvc/llvm-project?rev=243032&view=rev
Patch out a fatal assertion in OpenMP runtime until preconditions are met

Compiling simple testcase with g++ and linking it to the LLVM OpenMP runtime
compiled in debug mode trips an assertion that produces a fatal error. When
the assertion is skipped, the program runs successfully to completion and 
produces the same answer as the sequential code. Intel will restore the
assertion with a patch that fixes the issues that cause it to trip.

Patch by John Mellor-Crummey

Differential Revision: http://reviews.llvm.org/D11269


Modified: openmp/trunk/runtime/src/kmp_runtime.c
URL: http://llvm.org/viewvc/llvm-project/openmp/trunk/runtime/src/kmp_runtime.c?rev=243032&r1=243031&r2=243032&view=diff
--- openmp/trunk/runtime/src/kmp_runtime.c (original)
+++ openmp/trunk/runtime/src/kmp_runtime.c Thu Jul 23 13:58:37 2015
@@ -2089,7 +2089,11 @@ __kmp_fork_call(
     if ( __kmp_tasking_mode != tskm_immediate_exec ) {
         // Set master's task team to team's task team. Unless this is hot team, it should be NULL.
+#if 0
+        // Patch out an assertion that trips while the runtime seems to operate correctly.
+        // Avoiding the preconditions that cause the assertion to trip has been promised as a forthcoming patch.
         KMP_DEBUG_ASSERT(master_th->th.th_task_team == parent_team->t.t_task_team[master_th->th.th_task_state]);
         KA_TRACE( 20, ( "__kmp_fork_call: Master T#%d pushing task_team %p / team %p, new task_team %p / team %p\n",
                       __kmp_gtid_from_thread( master_th ), master_th->th.th_task_team,
                       parent_team, team->t.t_task_team[master_th->th.th_task_state], team ) );

More information about the Openmp-commits mailing list