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8072774: bigapps/Weblogic+medrec/nowarnings fails due to CodeHeap 'profiled nmethods' exhaustion

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Store profiled code in the non-profiled code heap (and vice versa) if the code cache is really full.

Reviewed-by: kvn, iveresov
This commit is contained in:
Tobias Hartmann 2015-02-23 07:55:37 +01:00
parent 88848bd9e8
commit 58338525b4
2 changed files with 24 additions and 7 deletions
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29
hotspot/src/share/vm/code/codeCache.cpp
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@ -360,7 +360,7 @@ CodeBlob* CodeCache::next_blob(CodeBlob* cb) {
* run the constructor for the CodeBlob subclass he is busy
* instantiating.
*/
CodeBlob* CodeCache::allocate(int size, int code_blob_type) {
CodeBlob* CodeCache::allocate(int size, int code_blob_type, bool strict) {
// Possibly wakes up the sweeper thread.
NMethodSweeper::notify(code_blob_type);
assert_locked_or_safepoint(CodeCache_lock);
@ -379,11 +379,28 @@ CodeBlob* CodeCache::allocate(int size, int code_blob_type) {
if (cb != NULL) break;
if (!heap->expand_by(CodeCacheExpansionSize)) {
// Expansion failed
if (SegmentedCodeCache && (code_blob_type == CodeBlobType::NonNMethod)) {
// Fallback solution: Store non-nmethod code in the non-profiled code heap.
// Note that at in the sweeper, we check the reverse_free_ratio of the non-profiled
// code heap and force stack scanning if less than 10% if the code heap are free.
return allocate(size, CodeBlobType::MethodNonProfiled);
if (SegmentedCodeCache && !strict) {
// Fallback solution: Try to store code in another code heap.
// Note that in the sweeper, we check the reverse_free_ratio of the code heap
// and force stack scanning if less than 10% of the code heap are free.
int type = code_blob_type;
switch (type) {
case CodeBlobType::NonNMethod:
type = CodeBlobType::MethodNonProfiled;
strict = false; // Allow recursive search for other heaps
break;
case CodeBlobType::MethodProfiled:
type = CodeBlobType::MethodNonProfiled;
strict = true;
break;
case CodeBlobType::MethodNonProfiled:
type = CodeBlobType::MethodProfiled;
strict = true;
break;
}
if (heap_available(type)) {
return allocate(size, type, strict);
}
}
MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
CompileBroker::handle_full_code_cache(code_blob_type);