RFR: 8328168: Epsilon: Premature OOM when allocating object larger than uncommitted heap size [v2]

[Guoxiong Li]

> Hi all,
> 
> When an object size meets the following three conditions, the allocation will fail unexpectedly.
> 
> 1. `object_size` > `uncommitted_size`
> 2. `object_size` > `committed_but_unused_size`
> 3. `object_size` < `unused_size` (`unused_size` equals `uncommitted_size + committed_but_unused_size`)
> 
> Please read the newly added test of this patch for the concrete case.
> 
> Thanks for taking the time to review.
> 
> Best Regrads,
> -- Guoxiong

Guoxiong Li has updated the pull request incrementally with 32 additional commits since the last revision:

 - Adjust test.
 - Add assert statement.
 - Merge branch 'master' into FAILED-ALLOCATION
 - 8328228: Missing comma in copyright year for a few JColorChooser tests
   
   Reviewed-by: jpai
 - 8328130: Remove applet usage from JColorChooser tests Test4759934
   
   Reviewed-by: prr
 - 8328121: Remove applet usage from JColorChooser tests Test4759306
   
   Reviewed-by: azvegint
 - 8327857: Remove applet usage from JColorChooser tests Test4222508
   
   Reviewed-by: prr, tr
 - 8327859: Remove applet usage from JColorChooser tests Test4319113
   
   Reviewed-by: prr, tr
 - 8328011: Convert java/awt/Frame/GetBoundsResizeTest/GetBoundsResizeTest.java applet test to main
   
   Reviewed-by: honkar, aivanov
 - 8328021: Convert applet test java/awt/List/SetFontTest/SetFontTest.html to main program
   
   Reviewed-by: honkar, abhiscxk
 - ... and 22 more: https://git.openjdk.org/jdk/compare/4e1e36d8...5c99942d

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18304/files
  - new: https://git.openjdk.org/jdk/pull/18304/files/4e1e36d8..5c99942d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18304&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18304&range=00-01

  Stats: 3723 lines in 97 files changed: 1771 ins; 1574 del; 378 mod
  Patch: https://git.openjdk.org/jdk/pull/18304.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18304/head:pull/18304

PR: https://git.openjdk.org/jdk/pull/18304