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D11159: Fixing the stack offset functionality

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llvm-svn: 244030
This commit is contained in:
Andrey Churbanov 2015-08-05 11:12:45 +00:00
parent 6fbef2a780
commit 368b70ef95
1 changed files with 8 additions and 3 deletions
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11
openmp/runtime/src/z_Linux_util.c
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@ -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",