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8252125: add an "inflating" entry to the "table" of bit patterns in share/oops/markWord.hpp

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Reviewed-by: tschatzl, coleenp
This commit is contained in:
Daniel D. Daugherty 2020-08-21 16:01:46 -04:00
parent d1ab20c633
commit 5db57dc1a5
1 changed files with 4 additions and 3 deletions
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7
src/hotspot/share/oops/markWord.hpp
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@ -84,12 +84,13 @@
// [header | 0 | 01] unlocked regular object header
// [ptr | 10] monitor inflated lock (header is wapped out)
// [ptr | 11] marked used to mark an object
// [0 ............ 0| 00] inflating inflation in progress
//
// We assume that stack/thread pointers have the lowest two bits cleared.
//
// - INFLATING() is a distinguished markword value that is used when
// inflating an existing stack-lock into an ObjectMonitor. See below
// for is_being_inflated() and INFLATING().
// - INFLATING() is a distinguished markword value of all zeros that is
// used when inflating an existing stack-lock into an ObjectMonitor.
// See below for is_being_inflated() and INFLATING().
class BasicLock;
class ObjectMonitor;