diff options
Diffstat (limited to 'openmp/runtime/src/z_Linux_util.c')
| -rw-r--r-- | openmp/runtime/src/z_Linux_util.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/openmp/runtime/src/z_Linux_util.c b/openmp/runtime/src/z_Linux_util.c index 9f34d3460ea..133a5fe8007 100644 --- a/openmp/runtime/src/z_Linux_util.c +++ b/openmp/runtime/src/z_Linux_util.c @@ -684,7 +684,7 @@ __kmp_launch_worker( void *thr ) #endif /* KMP_BLOCK_SIGNALS */ void *exit_val; #if KMP_OS_LINUX || KMP_OS_FREEBSD - void *padding = 0; + void * volatile padding = 0; #endif int gtid; @@ -1012,8 +1012,13 @@ __kmp_create_worker( int gtid, kmp_info_t *th, size_t stack_size ) ); }; // if - /* Set stack size for this thread now. */ - stack_size += gtid * __kmp_stkoffset; + /* Set stack size for this thread now. + * The multiple of 2 is there because on some machines, requesting an unusual stacksize + * causes the thread to have an offset before the dummy alloca() takes place to create the + * offset. Since we want the user to have a sufficient stacksize AND support a stack offset, we + * alloca() twice the offset so that the upcoming alloca() does not eliminate any premade + * offset, and also gives the user the stack space they requested for all threads */ + stack_size += gtid * __kmp_stkoffset * 2; KA_TRACE( 10, ( "__kmp_create_worker: T#%d, default stacksize = %lu bytes, " "__kmp_stksize = %lu bytes, final stacksize = %lu bytes\n", |
