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src/hotspot/share/code/codeCache.cpp


*** 144,153 **** --- 144,154 ---- address CodeCache::_low_bound = 0; address CodeCache::_high_bound = 0; int CodeCache::_number_of_nmethods_with_dependencies = 0; bool CodeCache::_needs_cache_clean = false; nmethod* CodeCache::_scavenge_root_nmethods = NULL; + ExceptionCache* volatile CodeCache::_exception_cache_purge_list = NULL; // Initialize arrays of CodeHeap subsets GrowableArray<CodeHeap*>* CodeCache::_heaps = new(ResourceObj::C_HEAP, mtCode) GrowableArray<CodeHeap*> (CodeBlobType::All, true); GrowableArray<CodeHeap*>* CodeCache::_compiled_heaps = new(ResourceObj::C_HEAP, mtCode) GrowableArray<CodeHeap*> (CodeBlobType::All, true); GrowableArray<CodeHeap*>* CodeCache::_nmethod_heaps = new(ResourceObj::C_HEAP, mtCode) GrowableArray<CodeHeap*> (CodeBlobType::All, true); ***************
*** 900,909 **** --- 901,938 ---- assert(count + InlineCacheBuffer::pending_icholder_count() + CompiledICHolder::live_not_claimed_count() == CompiledICHolder::live_count(), "must agree"); #endif } + // Defer freeing of concurrently cleaned ExceptionCache entries until + // after a global handshake operation. + void CodeCache::release_exception_cache(ExceptionCache* entry) { + if (SafepointSynchronize::is_at_safepoint()) { + delete entry; + } else { + for (;;) { + ExceptionCache* free_list_head = Atomic::load(&_exception_cache_purge_list); + entry->set_purge_list_next(free_list_head); + if (Atomic::cmpxchg(entry, &_exception_cache_purge_list, free_list_head) == free_list_head) { + break; + } + } + } + } + + // Delete exception caches that have been concurrently unlinked, + // followed by a global handshake operation. + void CodeCache::purge_exception_caches() { + ExceptionCache* curr = _exception_cache_purge_list; + while (curr != NULL) { + ExceptionCache* next = curr->purge_list_next(); + delete curr; + curr = next; + } + _exception_cache_purge_list = NULL; + } + void CodeCache::gc_prologue() { } void CodeCache::gc_epilogue() { prune_scavenge_root_nmethods(); }
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