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6479360: PrintClassHistogram improvements

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Jcmd <pid> GC.class_stats (UnlockDiagnosticVMOptions)

Reviewed-by: coleenp, hseigel, sla, acorn
This commit is contained in:
Ioi Lam 2013-01-25 15:06:18 -05:00 • committed by Karen Kinnear
parent 19303cc71d
commit 93b845e21b
23 changed files with 807 additions and 53 deletions
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5
hotspot/src/share/vm/oops/constantPool.hpp
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@ -80,6 +80,7 @@ class CPSlot VALUE_OBJ_CLASS_SPEC {
}
};
class KlassSizeStats;
class ConstantPool : public Metadata {
friend class VMStructs;
friend class BytecodeInterpreter; // Directly extracts an oop in the pool for fast instanceof/checkcast
@ -684,9 +685,13 @@ class ConstantPool : public Metadata {
return 0 <= index && index < length();
}
// Sizing (in words)
static int header_size() { return sizeof(ConstantPool)/HeapWordSize; }
static int size(int length) { return align_object_size(header_size() + length); }
int size() const { return size(length()); }
#if INCLUDE_SERVICES
void collect_statistics(KlassSizeStats *sz) const;
#endif
friend class ClassFileParser;
friend class SystemDictionary;