+PrintInlining falsly? says: never executed

[Tom Rodriguez]

On Nov 26, 2009, at 8:29 AM, Ulf Zibis wrote:

> Having:
> VM option 'MaxInlineSize=250'
> VM option '+PrintCompilation'
> VM option '+PrintInlining'
> 
> I get:
>     @ 180   sun.nio.cs.ext.EUC_TW_C_d_b_codeToBuffer4$Decoder::decode  never executed
> and
> static sun/nio/cs/ext/EUC_TW_C_d_b_codeToBuffer4$Decoder.decode(BBI[C[II)Ljava/nio/charset/CoderResult;
> interpreter_invocation_count:    10001
> invocation_counter:               5001
> backedge_counter:                    1

Where did this output come from?  Was it printed at the time it was being checked for inlining?  The "never executed" logic is in src/share/vm/opto/bytecodeInfo.cpp and it's simply checking that the invocation counter is non-zero.  Are you saying that it's actually non-zero but we see it as zero?

> 
> Why PrintInlining says: "never executed" ?
> 
> 
> 
> Having only:
> VM option '+PrintInlining'
> 
> I get:
>     @ 181   sun.nio.cs.ext.EUC_TW_C_d_b_codeToBuffer4$Decoder::decode  too big

method size: below is the size of the method object.  code size: is the size of the bytecodes.

tom

> 
> 
> For the method size refer:
> {method}
> - klass: {other class}
> - method holder:     'sun/nio/cs/ext/EUC_TW_C_d_b_codeToBuffer4$Decoder'
> - constants:         0x085562d4{constant pool}
> 
> - access:            0x81000000 - name:              'decode'
> - signature:         '(BBI[C[II)Ljava/nio/charset/CoderResult;'
> - max stack:         6
> - max locals:        9
> - size of params:    7
> - method size:       20
> - vtable index:      17
> - i2i entry:         0x00acb6a0
> 
> - adapter:           0x03d431f0
> - compiled entry     0x00b91070
> - code size:         189
> - code start:        0x1425d730
> - code end (excl):   0x1425d7ed
> - method data:       0x142c5e08
> - checked ex length: 0
> - linenumber start:  0x1425d7ed
> - localvar length:   9
> - localvar start:    0x1425d802
> 
> 
> -Ulf
> 
>