0001159: Byte-code produced for _resin_compat_class_0

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Category

Severity

Reproducibility

Date Submitted

Last Update

0001159

[Resin]

minor

always

05-31-06 13:22

06-08-06 18:32

Reporter

sam

View Status

public

Assigned To

ferg

Priority

high

Resolution

fixed

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

3.0.20

Product Version

3.0.19

Product Build

Summary

0001159: Byte-code produced for _resin_compat_class_0

Description

(rep by L Plaetinck)

We are working on a Java profiling tool and ran into some problems when
instrumenting some of the Resin classes.One of the offending classes
seems to be com.caucho.doc.JavadocRedirectServlet, especially the method
_resin_compat_class0():

private static java.lang.Class _resin_compat_class_0();
  Code:
   Stack=2, Locals=0, Args_size=0
   0: getstatic 0000221; //Field
_resin_compat_class_0:Ljava/lang/Class;
   3: dup
   4: ifnonnull 18
   7: pop
   8: ldc_w 0000219; //String com.caucho.doc.JavadocRedirectServlet
   11: invokestatic 0000225; //Method
java/lang/Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
   14: dup
   15: putstatic 0000221; //Field
_resin_compat_class_0:Ljava/lang/Class;
   18: areturn
   19: aconst_null
   20: areturn
  Exception table:
   from to target type
     0 19 19 Class java/lang/ClassNotFoundException

Since this seems to be a regular try - catch implementation, one would
expect to see the code "astore_0" between instruction 18 and 19. After
instrumentation, this leads to a verify error "Inconsistent stack height
2 != 1"
Any information on how this was compiled would be appreciated.

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Issue History
Date Modified	Username	Field	Change
05-31-06 13:22	sam	New Issue
06-01-06 08:22	sam	Project	Quercus => Resin
06-08-06 18:32	ferg	Assigned To	=> ferg
06-08-06 18:32	ferg	Status	new => closed
06-08-06 18:32	ferg	Resolution	open => fixed
06-08-06 18:32	ferg	Fixed in Version	=> 3.0.20

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