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[OpenMP] Add check for hot_teams array

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If hot teams are not being used, this code could seg fault without the added
check, and does so when composability is used in conjunction with nesting.
The fix prevents the segfault.

Differential Revision: https://reviews.llvm.org/D50649


git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@340629 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jonathan Peyton
2018-08-24 18:05:00 +00:00
parent d9dca06e83
commit 420cbcd0c4
1 changed files with 2 additions and 1 deletions
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runtime/src/kmp_runtime.cpp
+2 -1
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@@ -2115,7 +2115,8 @@ int __kmp_fork_call(ident_t *loc, int gtid,
master_th->th.th_task_state;
master_th->th.th_task_state_top++;
#if KMP_NESTED_HOT_TEAMS
if (team == master_th->th.th_hot_teams[active_level].hot_team) {
if (master_th->th.th_hot_teams &&
team == master_th->th.th_hot_teams[active_level].hot_team) {
// Restore master's nested state if nested hot team
master_th->th.th_task_state =
master_th->th