7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap.
Reviewed-by: iveresov, jmasa, tonyp
| author |
ysr |
| date |
Tue, 26 Apr 2011 21:17:24 -0700 |
| parents |
a61af66fc99e |
| children |
|
| rev |
line source |
|
0
|
1 README:
|
|
|
2 This file should be located at the top of the hotspot Mercurial repository.
|
|
|
3
|
|
|
4 See http://openjdk.java.net/ for more information about the OpenJDK.
|
|
|
5
|
|
|
6 See ../README-builds.html for complete details on build machine requirements.
|
|
|
7
|
|
|
8 Simple Build Instructions:
|
|
|
9
|
|
|
10 cd make && gnumake
|
|
|
11
|
|
|
12 The files that will be imported into the jdk build will be in the "build"
|
|
|
13 directory.
|
|
|
14
|
