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8019835: Strings interned in different threads equal but does not ==

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Add -XX:+VerifyStringTableAtExit option and code to verify StringTable invariants.

Reviewed-by: rdurbin, sspitsyn, coleenp
This commit is contained in:
Daniel D. Daugherty 2013-09-18 07:02:10 -07:00
parent 876967ae1f
commit 41bce440a4
6 changed files with 218 additions and 0 deletions
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20
hotspot/src/share/vm/classfile/symbolTable.hpp
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@ -311,6 +311,26 @@ public:
static void verify();
static void dump(outputStream* st);
enum VerifyMesgModes {
_verify_quietly = 0,
_verify_with_mesgs = 1
};
enum VerifyRetTypes {
_verify_pass = 0,
_verify_fail_continue = 1,
_verify_fail_done = 2
};
static VerifyRetTypes compare_entries(int bkt1, int e_cnt1,
HashtableEntry<oop, mtSymbol>* e_ptr1,
int bkt2, int e_cnt2,
HashtableEntry<oop, mtSymbol>* e_ptr2);
static VerifyRetTypes verify_entry(int bkt, int e_cnt,
HashtableEntry<oop, mtSymbol>* e_ptr,
VerifyMesgModes mesg_mode);
static int verify_and_compare_entries();
// Sharing
static void copy_buckets(char** top, char*end) {
the_table()->Hashtable<oop, mtSymbol>::copy_buckets(top, end);