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7017124: Fix some VM stats to avoid 32-bit overflow

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Added new method inc_stat_counter() to increment long statistic values and use atomic long load and store.

Reviewed-by: dholmes, jrose, phh, never
This commit is contained in:
Vladimir Kozlov 2011-02-07 10:34:39 -08:00
parent e7c3086ed3
commit b9633d42b4
10 changed files with 100 additions and 80 deletions
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8
hotspot/src/share/vm/memory/allocation.inline.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -32,6 +32,12 @@
void trace_heap_malloc(size_t size, const char* name, void *p);
void trace_heap_free(void *p);
// Increments unsigned long value for statistics (not atomic on MP).
inline void inc_stat_counter(volatile julong* dest, julong add_value) {
julong value = Atomic::load((volatile jlong*)dest);
value += add_value;
Atomic::store((jlong)value, (volatile jlong*)dest);
}
// allocate using malloc; will fail if no memory available
inline char* AllocateHeap(size_t size, const char* name = NULL) {