161 
 162 address os::current_stack_pointer() {
 163   register void *sp __asm__ ("sp");
 164   return (address)sp;
 165 }
 166 
 167 static void current_stack_region(address* bottom, size_t* size) {
 168   if (os::Linux::is_initial_thread()) {
 169     // initial thread needs special handling because pthread_getattr_np()
 170     // may return bogus value.
 171     *bottom = os::Linux::initial_thread_stack_bottom();
 172     *size = os::Linux::initial_thread_stack_size();
 173   } else {
 174     pthread_attr_t attr;
 175 
 176     int rslt = pthread_getattr_np(pthread_self(), &attr);
 177 
 178     // JVM needs to know exact stack location, abort if it fails
 179     if (rslt != 0) {
 180       if (rslt == ENOMEM) {
 181         vm_exit_out_of_memory(0, "pthread_getattr_np");
 182       } else {
 183         fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt));
 184       }
 185     }
 186 
 187     if (pthread_attr_getstack(&attr, (void**)bottom, size) != 0) {
 188       fatal("Can not locate current stack attributes!");
 189     }
 190 
 191     pthread_attr_destroy(&attr);
 192   }
 193   assert(os::current_stack_pointer() >= *bottom &&
 194          os::current_stack_pointer() < *bottom + *size, "just checking");
 195 }
 196 
 197 address os::current_stack_base() {
 198   address bottom;
 199   size_t size;
 200   current_stack_region(&bottom, &size);
 201   return bottom + size;

 161 
 162 address os::current_stack_pointer() {
 163   register void *sp __asm__ ("sp");
 164   return (address)sp;
 165 }
 166 
 167 static void current_stack_region(address* bottom, size_t* size) {
 168   if (os::Linux::is_initial_thread()) {
 169     // initial thread needs special handling because pthread_getattr_np()
 170     // may return bogus value.
 171     *bottom = os::Linux::initial_thread_stack_bottom();
 172     *size = os::Linux::initial_thread_stack_size();
 173   } else {
 174     pthread_attr_t attr;
 175 
 176     int rslt = pthread_getattr_np(pthread_self(), &attr);
 177 
 178     // JVM needs to know exact stack location, abort if it fails
 179     if (rslt != 0) {
 180       if (rslt == ENOMEM) {
 181         vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "pthread_getattr_np");
 182       } else {
 183         fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt));
 184       }
 185     }
 186 
 187     if (pthread_attr_getstack(&attr, (void**)bottom, size) != 0) {
 188       fatal("Can not locate current stack attributes!");
 189     }
 190 
 191     pthread_attr_destroy(&attr);
 192   }
 193   assert(os::current_stack_pointer() >= *bottom &&
 194          os::current_stack_pointer() < *bottom + *size, "just checking");
 195 }
 196 
 197 address os::current_stack_base() {
 198   address bottom;
 199   size_t size;
 200   current_stack_region(&bottom, &size);
 201   return bottom + size;