30 * sun.hotspot.WhiteBox$WhiteBoxPermission
31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xss512k WBStackSize
32 */
33
34 /*
35 * The test may product a false failure if too big StackYellowPages/StackRedPages/ShackShadowPages
36 * VM options are specified. The proper test would retrieve the page size from VM and account for these options
37 * instead of check below:
38 * Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1
39 *
40 * Please file a test bug, if this is a problem.
41 */
42
43 import sun.hotspot.WhiteBox;
44
45 public class WBStackSize {
46
47 static final long K = 1024;
48
49 static final long MIN_STACK_SIZE = 8 * K;
50 static final long MAX_STACK_SIZE_ALLOCATED_IN_MAIN = 200 * K; // current value is about 130k on 64-bit platforms
51
52 static final WhiteBox wb = WhiteBox.getWhiteBox();
53
54 static long stackSizeOnOverflow = -1;
55
56 static int eatAllStack() {
57 return eatAllStack() * 2;
58 }
59
60 static void testStackOverflow() {
61
62 stackSizeOnOverflow = wb.getThreadRemainingStackSize();
63
64 if (stackSizeOnOverflow > MIN_STACK_SIZE) {
65
66 try {
67 testStackOverflow();
68 } catch (StackOverflowError e) {
69 // We caught SOE too early. The error will be reported in main()
70 }
71
72 } else {
73
74 try {
75 eatAllStack();
76 throw new RuntimeException("Haven't caught StackOverflowError at all");
77 } catch (StackOverflowError e) {
78 // OK: we caught the anticipated error
79 }
80 }
81 }
82
83 public static void main(String[] args) {
84 long configStackSize = wb.getIntxVMFlag("ThreadStackSize") * K;
85
86 System.out.println("ThreadStackSize VM option: " + configStackSize);
87
88 long actualStackSize = wb.getThreadStackSize();
89 System.out.println("Full stack size: " + actualStackSize);
90
91 if (Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1) {
92 throw new RuntimeException("getThreadFullStackSize value [" + actualStackSize
93 + "] should be within 90%..110% of the value returned by HotSpotDiagnosticMXBean");
94 }
95
96 long remainingStackSize = wb.getThreadRemainingStackSize();
97 System.out.println("Remaining stack size in main(): " + remainingStackSize);
98
99 // Up to 200k can be already allocated by VM
100 if (remainingStackSize > configStackSize
101 || (configStackSize > MAX_STACK_SIZE_ALLOCATED_IN_MAIN
102 && remainingStackSize < configStackSize - MAX_STACK_SIZE_ALLOCATED_IN_MAIN)) {
103
104 throw new RuntimeException("getThreadRemainingStackSize value [" + remainingStackSize
105 + "] should be at least ThreadStackSize value [" + configStackSize + "] minus ["
106 + MAX_STACK_SIZE_ALLOCATED_IN_MAIN + "]");
107 }
108
109 testStackOverflow();
110
111 if (stackSizeOnOverflow > MIN_STACK_SIZE) {
112 throw new RuntimeException("Caught StackOverflowError too early: when there were "
113 + stackSizeOnOverflow + " bytes in stack");
114 } else if (stackSizeOnOverflow < 0) {
115 throw new RuntimeException("Internal test error: stackRemainingSize < 0");
116 } else {
117 System.out.println("Caught StackOverflowError as expected");
118 }
119 }
120 }
|
30 * sun.hotspot.WhiteBox$WhiteBoxPermission
31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xss512k WBStackSize
32 */
33
34 /*
35 * The test may product a false failure if too big StackYellowPages/StackRedPages/ShackShadowPages
36 * VM options are specified. The proper test would retrieve the page size from VM and account for these options
37 * instead of check below:
38 * Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1
39 *
40 * Please file a test bug, if this is a problem.
41 */
42
43 import sun.hotspot.WhiteBox;
44
45 public class WBStackSize {
46
47 static final long K = 1024;
48
49 static final long MIN_STACK_SIZE = 8 * K;
50 static final long MAX_STACK_SIZE_ALLOCATED_IN_MAIN = 150 * K; // current value is about 130k on 64-bit platforms
51
52 static final WhiteBox wb = WhiteBox.getWhiteBox();
53
54 static long stackSizeOnOverflow = -1;
55
56 static int eatAllStack() {
57 return eatAllStack() * 2;
58 }
59
60 static void testStackOverflow() {
61
62 stackSizeOnOverflow = wb.getThreadRemainingStackSize();
63
64 if (stackSizeOnOverflow > MIN_STACK_SIZE) {
65
66 try {
67 testStackOverflow();
68 } catch (StackOverflowError e) {
69 // We caught SOE too early. The error will be reported in main()
70 }
71
72 } else {
73
74 try {
75 eatAllStack();
76 throw new RuntimeException("Haven't caught StackOverflowError at all");
77 } catch (StackOverflowError e) {
78 // OK: we caught the anticipated error
79 }
80 }
81 }
82
83 public static void main(String[] args) {
84 long configStackSize = wb.getIntxVMFlag("ThreadStackSize") * K;
85 System.out.println("ThreadStackSize VM option: " + configStackSize);
86
87 long stackProtectionSize = wb.getIntxVMFlag("StackShadowPages") * wb.getVMPageSize();
88 System.out.println("Size of protected shadow pages: " + stackProtectionSize);
89
90 long actualStackSize = wb.getThreadStackSize();
91 System.out.println("Full stack size: " + actualStackSize);
92
93 if (Math.abs(actualStackSize - configStackSize) > configStackSize * 0.1) {
94 throw new RuntimeException("getThreadFullStackSize value [" + actualStackSize
95 + "] should be within 90%..110% of the value returned by HotSpotDiagnosticMXBean");
96 }
97
98 long remainingStackSize = wb.getThreadRemainingStackSize();
99 System.out.println("Remaining stack size in main(): " + remainingStackSize);
100
101 // Up to 150k can be already allocated by VM and some space is used for stack protection.
102 long spaceAlreadyOccupied = MAX_STACK_SIZE_ALLOCATED_IN_MAIN + stackProtectionSize;
103
104 if (remainingStackSize > configStackSize
105 || (configStackSize > spaceAlreadyOccupied
106 && remainingStackSize < configStackSize - spaceAlreadyOccupied)) {
107
108 throw new RuntimeException("getThreadRemainingStackSize value [" + remainingStackSize
109 + "] should be at least ThreadStackSize value [" + configStackSize + "] minus ["
110 + spaceAlreadyOccupied + "]");
111 }
112
113 testStackOverflow();
114
115 if (stackSizeOnOverflow > MIN_STACK_SIZE) {
116 throw new RuntimeException("Caught StackOverflowError too early: when there were "
117 + stackSizeOnOverflow + " bytes in stack");
118 } else if (stackSizeOnOverflow < 0) {
119 throw new RuntimeException("Internal test error: stackRemainingSize < 0");
120 } else {
121 System.out.println("Caught StackOverflowError as expected");
122 }
123 }
124 }
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