src/os/posix/vm/os_posix.cpp

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, kvn

@@ -1094,10 +1094,12 @@
   size_t stack_size = 0;
   size_t guard_size = 0;
   int detachstate = 0;
   pthread_attr_getstacksize(attr, &stack_size);
   pthread_attr_getguardsize(attr, &guard_size);
+  // Work around linux NPTL implementation error, see also os::create_thread() in os_linux.cpp.
+  LINUX_ONLY(stack_size -= guard_size);
   pthread_attr_getdetachstate(attr, &detachstate);
   jio_snprintf(buf, buflen, "stacksize: " SIZE_FORMAT "k, guardsize: " SIZE_FORMAT "k, %s",
     stack_size / 1024, guard_size / 1024,
     (detachstate == PTHREAD_CREATE_DETACHED ? "detached" : "joinable"));
   return buf;