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src/os_cpu/aix_ppc/vm/os_aix_ppc.cpp

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rev 12363 : 8169373: Work around linux NPTL stack guard error.
Summary: Also skip libc guard page for compiler thread, merge similar code on linux platforms, and streamline libc guard page handling on linuxs390, linuxppc, aixppc.
Reviewed-by: dholmes, dcubed

@@ -533,17 +533,19 @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // thread stack
 
-size_t os::Posix::_compiler_thread_min_stack_allowed = 128 * K;
-size_t os::Posix::_java_thread_min_stack_allowed = 128 * K;
+// These sizes exclude libc stack guard pages, but include
+// the HotSpot guard pages.
+size_t os::Posix::_compiler_thread_min_stack_allowed = 512 * K;
+size_t os::Posix::_java_thread_min_stack_allowed = 512 * K;
 size_t os::Posix::_vm_internal_thread_min_stack_allowed = 128 * K;
 
-// return default stack size for thr_type
+// Return default stack size for thr_type.
 size_t os::Posix::default_stack_size(os::ThreadType thr_type) {
-  // default stack size (compiler thread needs larger stack)
+  // Default stack size (compiler thread needs larger stack).
   size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
   return s;
 }
 
 /////////////////////////////////////////////////////////////////////////////
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