34 lines
1.4 KiB
Diff
34 lines
1.4 KiB
Diff
--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java
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+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java
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@@ -101,7 +101,8 @@ public class PStack extends Tool {
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if (jthread != null) {
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jthread.printThreadInfoOn(out);
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}
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- while (f != null) {
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+ int maxStack = 256;
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+ while (f != null && maxStack-- > 0) {
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ClosestSymbol sym = f.closestSymbolToPC();
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Address pc = f.pc();
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out.print(pc + "\t");
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@@ -183,10 +184,19 @@ public class PStack extends Tool {
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}
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}
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}
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+ Address oldPC = f.pc();
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+ Address oldFP = f.localVariableBase();
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f = f.sender(th);
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+ if (f != null
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+ && oldPC.equals(f.pc())
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+ && oldFP.equals(f.localVariableBase())) {
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+ // We didn't make any progress
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+ f = null;
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+ }
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}
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} catch (Exception exp) {
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- exp.printStackTrace();
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+ // exp.printStackTrace();
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+ out.println("bad stack: " + exp);
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// continue, may be we can do a better job for other threads
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}
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if (concurrentLocks) {
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