src/os_cpu/linux_sparc/vm/os_linux_sparc.cpp

rev 12334 : 8169373: Work around linux NPTL stack guard error.
Summary: Also skip OS guard page for compiler thread, merge similar code on linux platforms, and streamline OS guard page handling on linuxs390, linuxppc, aixppc.

@@ -154,55 +154,10 @@
 address os::current_stack_pointer() {
   register void *sp __asm__ ("sp");
   return (address)sp;
 }
 
-static void current_stack_region(address* bottom, size_t* size) {
-  if (os::Linux::is_initial_thread()) {
-    // initial thread needs special handling because pthread_getattr_np()
-    // may return bogus value.
-    *bottom = os::Linux::initial_thread_stack_bottom();
-    *size = os::Linux::initial_thread_stack_size();
-  } else {
-    pthread_attr_t attr;
-
-    int rslt = pthread_getattr_np(pthread_self(), &attr);
-
-    // JVM needs to know exact stack location, abort if it fails
-    if (rslt != 0) {
-      if (rslt == ENOMEM) {
-        vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "pthread_getattr_np");
-      } else {
-        fatal("pthread_getattr_np failed with errno = %d", rslt);
-      }
-    }
-
-    if (pthread_attr_getstack(&attr, (void**)bottom, size) != 0) {
-      fatal("Can not locate current stack attributes!");
-    }
-
-    pthread_attr_destroy(&attr);
-  }
-  assert(os::current_stack_pointer() >= *bottom &&
-         os::current_stack_pointer() < *bottom + *size, "just checking");
-}
-
-address os::current_stack_base() {
-  address bottom;
-  size_t size;
-  current_stack_region(&bottom, &size);
-  return bottom + size;
-}
-
-size_t os::current_stack_size() {
-  // stack size includes normal stack and HotSpot guard pages
-  address bottom;
-  size_t size;
-  current_stack_region(&bottom, &size);
-  return size;
-}
-
 char* os::non_memory_address_word() {
   // Must never look like an address returned by reserve_memory,
   // even in its subfields (as defined by the CPU immediate fields,
   // if the CPU splits constants across multiple instructions).
   // On SPARC, 0 != %hi(any real address), because there is no

@@ -735,16 +690,10 @@
   // default stack size (compiler thread needs larger stack)
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
   return s;
 }
 
-size_t os::Linux::default_guard_size(os::ThreadType thr_type) {
-  // Creating guard page is very expensive. Java thread has HotSpot
-  // guard page, only enable glibc guard page for non-Java threads.
-  return (thr_type == java_thread ? 0 : page_size());
-}
-
 #ifndef PRODUCT
 void os::verify_stack_alignment() {
 }
 #endif