1.1 --- a/src/share/vm/utilities/nativeCallStack.cpp Fri Jun 22 01:55:23 2018 -0700
1.2 +++ b/src/share/vm/utilities/nativeCallStack.cpp Mon Jun 25 07:59:51 2018 -0700
1.3 @@ -55,6 +55,7 @@
1.4 for (; index < NMT_TrackingStackDepth; index ++) {
1.5 _stack[index] = NULL;
1.6 }
1.7 + _hash_value = 0;
1.8 }
1.9
1.10 // number of stack frames captured
1.11 @@ -69,19 +70,16 @@
1.12 }
1.13
1.14 // Hash code. Any better algorithm?
1.15 -int NativeCallStack::hash() const {
1.16 - long hash_val = _hash_value;
1.17 +unsigned int NativeCallStack::hash() const {
1.18 + uintptr_t hash_val = _hash_value;
1.19 if (hash_val == 0) {
1.20 - long pc;
1.21 - int index;
1.22 - for (index = 0; index < NMT_TrackingStackDepth; index ++) {
1.23 - pc = (long)_stack[index];
1.24 - if (pc == 0) break;
1.25 - hash_val += pc;
1.26 + for (int index = 0; index < NMT_TrackingStackDepth; index++) {
1.27 + if (_stack[index] == NULL) break;
1.28 + hash_val += (uintptr_t)_stack[index];
1.29 }
1.30
1.31 NativeCallStack* p = const_cast<NativeCallStack*>(this);
1.32 - p->_hash_value = (int)(hash_val & 0xFFFFFFFF);
1.33 + p->_hash_value = (unsigned int)(hash_val & 0xFFFFFFFF);
1.34 }
1.35 return _hash_value;
1.36 }
