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7145569: G1: optimize nmethods scanning

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Add a list of nmethods to the RSet for a region that contain references into the region. Skip scanning the code cache during root scanning and scan the nmethod lists during RSet scanning instead.

Reviewed-by: tschatzl, brutisso, mgerdin, twisti, kvn
This commit is contained in:
John Cuthbertson 2013-08-15 10:52:18 +02:00
parent c144b8c30f
commit f63547bf71
22 changed files with 1256 additions and 476 deletions
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hotspot/src/share/vm/code/nmethod.hpp
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@ -566,7 +566,7 @@ public:
void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map,
OopClosure* f);
void oops_do(OopClosure* f) { oops_do(f, false); }
void oops_do(OopClosure* f, bool do_strong_roots_only);
void oops_do(OopClosure* f, bool allow_zombie);
bool detect_scavenge_root_oops();
void verify_scavenge_root_oops() PRODUCT_RETURN;