test/runtime/whitebox/WBStackSize.java

rev 7563 : 8067941: [TESTBUG] Fix tests for OS with 64K page size.

*** 45,55 ****
  public class WBStackSize {
  
      static final long K = 1024;
  
      static final long MIN_STACK_SIZE = 8 * K;
!     static final long MAX_STACK_SIZE_ALLOCATED_IN_MAIN = 200 * K; // current value is about 130k on 64-bit platforms
  
      static final WhiteBox wb = WhiteBox.getWhiteBox();
  
      static long stackSizeOnOverflow = -1;
  
--- 45,55 ----
  public class WBStackSize {
  
      static final long K = 1024;
  
      static final long MIN_STACK_SIZE = 8 * K;
!     static final long MAX_STACK_SIZE_ALLOCATED_IN_MAIN = 150 * K; // current value is about 130k on 64-bit platforms
  
      static final WhiteBox wb = WhiteBox.getWhiteBox();
  
      static long stackSizeOnOverflow = -1;
  
*** 80,92 ****
          }
      }
  
      public static void main(String[] args) {
          long configStackSize = wb.getIntxVMFlag("ThreadStackSize") * K;
- 
          System.out.println("ThreadStackSize VM option: " + configStackSize);
  
          long actualStackSize = wb.getThreadStackSize();
          System.out.println("Full stack size: " + actualStackSize);
  
          if (Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1) {
              throw new RuntimeException("getThreadFullStackSize value [" + actualStackSize
--- 80,94 ----
          }
      }
  
      public static void main(String[] args) {
          long configStackSize = wb.getIntxVMFlag("ThreadStackSize") * K;
          System.out.println("ThreadStackSize VM option: " + configStackSize);
  
+         long stackProtectionSize = wb.getIntxVMFlag("StackShadowPages") * wb.getVMPageSize();
+         System.out.println("Size of protected shadow pages: " + stackProtectionSize);
+ 
          long actualStackSize = wb.getThreadStackSize();
          System.out.println("Full stack size: " + actualStackSize);
  
          if (Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1) {
              throw new RuntimeException("getThreadFullStackSize value [" + actualStackSize
*** 94,111 ****
          }
  
          long remainingStackSize = wb.getThreadRemainingStackSize();
          System.out.println("Remaining stack size in main(): " + remainingStackSize);
  
!         // Up to 200k can be already allocated by VM
          if (remainingStackSize > configStackSize
!                 || (configStackSize > MAX_STACK_SIZE_ALLOCATED_IN_MAIN
!                 && remainingStackSize < configStackSize - MAX_STACK_SIZE_ALLOCATED_IN_MAIN)) {
  
              throw new RuntimeException("getThreadRemainingStackSize value [" + remainingStackSize
                                       + "] should be at least ThreadStackSize value [" + configStackSize + "] minus ["
!                                      + MAX_STACK_SIZE_ALLOCATED_IN_MAIN + "]");
          }
  
          testStackOverflow();
  
          if (stackSizeOnOverflow > MIN_STACK_SIZE) {
--- 96,115 ----
          }
  
          long remainingStackSize = wb.getThreadRemainingStackSize();
          System.out.println("Remaining stack size in main(): " + remainingStackSize);
  
!         // Up to 150k can be already allocated by VM and some space is used for stack protection.
!         long spaceAlreadyOccupied = MAX_STACK_SIZE_ALLOCATED_IN_MAIN + stackProtectionSize;
! 
          if (remainingStackSize > configStackSize
!             || (configStackSize > spaceAlreadyOccupied
!                 && remainingStackSize < configStackSize - spaceAlreadyOccupied)) {
  
              throw new RuntimeException("getThreadRemainingStackSize value [" + remainingStackSize
                                       + "] should be at least ThreadStackSize value [" + configStackSize + "] minus ["
!                                      + spaceAlreadyOccupied + "]");
          }
  
          testStackOverflow();
  
          if (stackSizeOnOverflow > MIN_STACK_SIZE) {