JDK-6227862 : Make javac generate compact verification tables in target 6
  • Type: Enhancement
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 6
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic,linux
  • CPU: generic,x86
  • Submitted: 2005-02-10
  • Updated: 2017-05-16
  • Resolved: 2005-05-05
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JDK 6
6 b35Fixed
Related Reports
Relates :  
JDK-6277389 - Add same_locals_1_stack_item_frame_extended in StackMapTable in javac
Relates :  
JDK-6271292 - javap should print StackMapTable in a more readable format
Relates :  
JDK-6283313 - Change javac default to target 6
Description
Javac should generate the compact stackmap attribute format to support the split verifier. 

The original CLDC-style verification table has around 10% class file size overhead. The compact format reduces it to below 5%. Please see Tiger feature 4639391 and 4639069 for the original split verifier work.

###@###.### 2005-2-10 19:08:33 GMT

The compact stackmap "StkMap" attribute should be generated in -target 6 classes. 

###@###.### 2005-04-05 22:03:15 GMT
Comments
EVALUATION This is an approved Mustang feature. ###@###.### 2005-2-10 19:18:11 GMT This is part of jsr202. No unit test is needed in the javac part of change. The new class file format change including the StkMap attribute will be tested in the split verifier testing. ###@###.### 2005-04-05 21:23:49 GMT The StkMap attribute name will be changed to StackMapTable. Please see 6259535. ###@###.### 2005-04-30 00:52:50 GMT
10-02-2005