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8240124: Better VM Interning

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Reviewed-by: rehn, pliden, smarks, rhalade, ahgross, jwilhelm
This commit is contained in:
Coleen Phillimore 2020-04-28 12:07:35 -04:00 • committed by Henry Jen
parent fa25d083be
commit a5cb23e29f
8 changed files with 365 additions and 286 deletions
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6
src/hotspot/share/classfile/symbolTable.cpp
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@ -96,7 +96,7 @@ static volatile bool _lookup_shared_first = false;
// Static arena for symbols that are not deallocated
Arena* SymbolTable::_arena = NULL;
static juint murmur_seed = 0;
static uint64_t _alt_hash_seed = 0;
static inline void log_trace_symboltable_helper(Symbol* sym, const char* msg) {
#ifndef PRODUCT
@ -108,7 +108,7 @@ static inline void log_trace_symboltable_helper(Symbol* sym, const char* msg) {
// Pick hashing algorithm.
static uintx hash_symbol(const char* s, int len, bool useAlt) {
return useAlt ?
AltHashing::murmur3_32(murmur_seed, (const jbyte*)s, len) :
AltHashing::halfsiphash_64(_alt_hash_seed, (const int8_t*)s, len) :
java_lang_String::hash_code((const jbyte*)s, len);
}
@ -785,7 +785,7 @@ void SymbolTable::rehash_table() {
return;
}
murmur_seed = AltHashing::compute_seed();
_alt_hash_seed = AltHashing::compute_seed();
if (do_rehash()) {
rehashed = true;