[HARMONY-5570] [classlib][pack200] LineNumberTableAttribute being computed incorrectly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0M6
• Component/s: Classlib
• Environment: Latest Pack200
• Assignee: Sian January
• Reporter: Andrew Cornwall
• Created: 04/Mar/08 17:14
• Updated: 05/Mar/08 16:40
• Resolved: 05/Mar/08 14:28

Description

In the latest Pack200 code, the LineNumberTable attribute is being calculated incorrectly. It appears to be right for a single class at a time, but when multiple classes are being unpacked the line_number values go strange.

To reproduce, unpack the attached mypack.pack and look at the LineNumberTable attribute for CPString.<init>. The LineNumberTable in the Harmony version is:
attribute LineNumberTable {
attribute_name_index = #88 // "LineNumberTable"
attribute_length = 18
line_number_table_length = 4
line_number_table

{ // start_pc line_number 0 2323 7 2324 14 2325 35 2327 }

}

whereas the LineNumberTable should be:

attribute LineNumberTable {
attribute_name_index = #9 // "LineNumberTable"
attribute_length = 18
line_number_table_length = 4
line_number_table

{ // start_pc line_number 0 27 7 28 14 29 35 31 }

If I had to guess, I'd bet the initial value is computed incorrectly, and subsequent deltas inherit the error.