archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-23 20:44:41 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8072016: Array copy may cause infinite cycle of deoptimization/compilation

Browse source 
Infinite deoptimization/recompilation cycles in case of arraycopy with tightly coupled allocation

Reviewed-by: kvn, vlivanov
This commit is contained in:
Roland Westrelin 2015-02-09 15:10:58 +01:00
parent a967f754a2
commit e6ac3ca09e
4 changed files with 170 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

6
hotspot/src/share/vm/opto/graphKit.cpp
View file

@ -2819,8 +2819,12 @@ Node* GraphKit::maybe_cast_profiled_obj(Node* obj,
if (type != NULL) {
Deoptimization::DeoptReason class_reason = Deoptimization::Reason_speculate_class_check;
Deoptimization::DeoptReason null_reason = Deoptimization::Reason_speculate_null_check;
ciMethod* trap_method = (sfpt == NULL) ? method() : sfpt->jvms()->method();
int trap_bci = (sfpt == NULL) ? bci() : sfpt->jvms()->bci();
if (!too_many_traps(null_reason) && !too_many_recompiles(null_reason) &&
!too_many_traps(class_reason) && !too_many_recompiles(class_reason)) {
!C->too_many_traps(trap_method, trap_bci, class_reason) &&
!C->too_many_recompiles(trap_method, trap_bci, class_reason)) {
Node* not_null_obj = NULL;
// not_null is true if we know the object is not null and
// there's no need for a null check