# if !defined(THREADS) || defined(GC_PTHREADS) || defined(GC_WIN32_THREADS) \
|| defined(GC_SOLARIS_THREADS)
if (GC_stackbottom == 0) {
- GC_stackbottom = GC_get_stack_base();
+ # if defined(GC_PTHREADS) && ! defined(GC_SOLARIS_THREADS)
+ /* Use thread_stack_base if available, as GC could be initialized from
+ a thread that is not the "main" thread. */
+ GC_stackbottom = GC_get_thread_stack_base();
+ # endif
+ if (GC_stackbottom == 0)
+ GC_stackbottom = GC_get_stack_base();
# if (defined(LINUX) || defined(HPUX)) && defined(IA64)
GC_register_stackbottom = GC_get_register_stack_base();
# endif