ytoshima

AbstractInterpreter::_code : StubQueue * = 0xb49150c0
_stub_buffer    : 0xb6f7a6c0
_number_of_stubs: 0x103
Codelet @ 0xb6f7a6c0      128   -1 0xffffffff  0x10c81a1:	 "slow signature handler"
Dump of assembler code from 0xb6f7a6e0 to 0xb6f7a740:
   0xb6f7a6e0:	mov    %esp,%ecx
   0xb6f7a6e2:	call   0xb6f7a6ec
   0xb6f7a6e7:	jmp    0xb6f7a73f
   0xb6f7a6ec:	push   %ecx
   0xb6f7a6ed:	push   %edi

ytoshima

Node
  AbsNode
    AbsDNode
    AbsFNode
    AbsINode
  AddNode
    AddDNode
    AddFNode
    AddINode
    AddLNode

ytoshima

<graphDocument>
  <group>
    <properties>
      <p name="name"> virtual jint Call.doit()</p>
    </properties>
    <graph name="Bytecode 0: aload_0">
      <nodes>
        <node id="159337448">
          <properties>
            <p name="name"> Root</p>

ytoshima

$ ~/jdk1.7.0-b147/fastdebug/bin/java -XX:+PrintCompilation -XX:+PrintIdeal -XX:CICompilerCount=1 sum 

    214    1             sum::doit (22 bytes)
VM option '+PrintCompilation'
VM option '+PrintIdeal'
VM option 'CICompilerCount=1'
 21	ConI	===  0  [[ 180 ]]  #int:0
 180	Phi	===  184  21  70  [[ 179 ]]  #int !orig=[159],[139],[66] !jvms: 
sum::doit @ bci:10
 179	AddI	=== _  180  181  [[ 178 ]]  !orig=[154],[137],70,[145] !jvms: su

ytoshima

  static int doit();
    flags: ACC_STATIC
    Code:
      stack=2, locals=2, args_size=0
         0: iconst_0      
         1: istore_0      
         2: iconst_0      
         3: istore_1      
         4: iload_1       
         5: bipush        100

ytoshima

// -XX::CompileOnly=sum::doit would narrow down the method to compile, but it
// is not used here.

$ ~/jdk1.7.0-b147/fastdebug/bin/java -XX:+PrintOptoAssembly sum
VM option '+PrintOptoAssembly'
{method} 
 - klass: {other class}
 - this oop:          0x911f8110
 - method holder:     'sum'
 - constants:         0x911f7e10 constant pool [32] for 'sum' cache=0x911f86b0

ytoshima

C1

$ ~/jdk1.7.0-b147/fastdebug/bin/java -XX:CompileOnly=gvnex::doHashSum -XX:+PrintLIR -client gvnex
VM option 'CompileOnly=gvnex::doHashSum'
VM option '+PrintLIR'
CompileOnly: compileonly *gvnex*.doHashSum
LIR:
B1 [0, 0] sux: B0 
__id_Instruction___________________________________________
   0 label [label:0x939c62c]

ytoshima

$ ~/local/jdk1.7.0-b147/fastdebug/bin/java -XX:+Verbose -XX:+PrintEscapeAnalysis -jar ~/local/jdk1.6.0_26/demo/jfc/Java2D/Java2Demo.jar 
VM option '+Verbose'
VM option '+PrintEscapeAnalysis'


======== Connection graph for  java.util.Properties$LineReader::readLine
   519 JavaObject GlobalEscape NSR [[ 578F 589F 623F 624F 452F 468F 469F 602F 606F]]   519	AllocateArray	===  503  199  501  8  1 ( 517  506  512  505  10  438  281  22  65  22  384  68  22  1  1 ) [[ 520  521  522  529  530  531 ]]  rawptr:NotNull ( int:>=0, java/lang/Object:NotNull *, bool, int ) java.util.Properties$LineReader::readLine @ bci:286  Type:{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address, 5:rawptr:NotNull} !jvms: java.util.Properties$LineReader::readLine @ bci:286
LocalVar [[ 519P]]   531	Proj	===  519  [[ 532  536 ]] #5  Type:rawptr:NotNull !jvms: java.util.Properties$LineReader::readLine @ bci:286
LocalVar [[ 519P]]   536	CheckCastPP	===  533  531  [[ 655  678  655  624  578  578  589  589  624  623 ]]   Type:char[i

ytoshima

#include "JniEx.h"
#include <stdlib.h>

void bad_func()
{
  int *ip = (int*)0xbffffffe;
  *ip = 1;
}

JNIEXPORT void JNICALL Java_JniEx_crash (JNIEnv *env, jclass cls) {

ytoshima

$ ~/local/jdk1.7.0-b147/fastdebug/bin/java -cp classes:lib/asm-4.0.jar name.yt.icache.Pet
D: bsm: type: (Object)void
D: bsm: fallback: MethodHandle(Object)void
D: bsm: fallback: MethodHandle(Object)void
D: fallback: type: (Object)void
D: fallback: type.dropParameterTypes(0,1): ()void
D: fallback: receiverClass: class name.yt.icache.Cat
D: fallback: target: MethodHandle(Cat)void
D: fallback: target after asType: MethodHandle(Object)void
D: fallback: test: MethodHandle(Object)boolean