fastdebug jdk

提问
http://stackoverflow.com/questions/40593304/where-to-get-fastdebug-debug-build-of-jdk-8-for-windows

安装使用
http://lovespss.blog.51cto.com/1907593/535219

下载
https://github.com/alexkasko/openjdk-unofficial-builds/releases
http://download.java.net/jdk7/archive/b142/binaries/
最后
+表示开启

打印编译信息的参数是-XX:+PrintCompilation，但不包括编译后的代码。若要看编译后的代码，需要加参数-XX:+PrintAssembly，再加上HSDIS插件

-XX:+UnlockExperimentalVMOptions   开启
-XX:+LogCompilation 开启日志打印。其打印出来的日志为XML格式，而非PrintCompilation简单的文本输出，并且这些日志比较大，通常会到达几百MB。它会影响正在运行的程序（默认情况下主要来自日志输出的影响）
-XX:+PrintOptoAssembly  查看编译后的代码
-XX:+PrintCompilation  、输出结果会提供运行时正在编译的方法的信息， 翻译信息http://blog.joda.org/2011/08/printcompilation-jvm-flag.html 输出的结果中未包含方法的签名，如果存在重载方法，区分起来则比较困难。
-XX:CompileThreshold=8000 方法或循环 被标记8000 次 则优化 
-XX:+CITime

倒数第二

{method}
 - this oop:          0x000000001c5712e0
 - method holder:     'com/nbugs/logging/ManyThreadTest'
 - constants:         0x000000001c570d78 constant pool [80] {0x000000001c570d80} for 'com/nbugs/logging/ManyThreadTest' cache=0x000000001c5a2da8
 - access:            0xc1000001  public 
 - name:              'threadTest'
 - signature:         '()V'
 - max stack:         3
 - max locals:        3
 - size of params:    1
 - method size:       12
 - vtable index:      5
 - i2i entry:         0x00000000030d5b00
 - adapters:          AHE@0x000000001cb38468: 0xb0000000 i2c: 0x00000000031e6b20 c2i: 0x00000000031e6c5a c2iUV: 0x00000000031e6c2d
 - compiled entry     0x00000000031e6c5a
 - code size:         38
 - code start:        0x000000001c571278
 - code end (excl):   0x000000001c57129e
 - method data:       0x0000000026740dc8
 - checked ex length: 0
 - linenumber start:  0x000000001c57129e
 - localvar length:   3
 - localvar start:    0x000000001c5712b2
#
#  void ( rawptr:BotPTR )
#
#r016 rdx:rdx   : parm 0: rawptr:BotPTR
# -- Old rsp -- Framesize: 80 --
#r191 rsp+76: in_preserve
#r190 rsp+72: return address
#r189 rsp+68: in_preserve
#r188 rsp+64: saved fp register
#r187 rsp+60: pad2, stack alignment
#r186 rsp+56: pad2, stack alignment
#r185 rsp+52: Fixed slot 1
#r184 rsp+48: Fixed slot 0
#r203 rsp+44: spill
#r202 rsp+40: spill
#r201 rsp+36: spill
#r200 rsp+32: spill
#r199 rsp+28: outgoing argument
#r198 rsp+24: outgoing argument
#r197 rsp+20: outgoing argument
#r196 rsp+16: outgoing argument
#r195 rsp+12: outgoing argument
#r194 rsp+ 8: outgoing argument
#r193 rsp+ 4: outgoing argument
#r192 rsp+ 0: outgoing argument
#
000   N83: #    B1 <- BLOCK HEAD IS JUNK   Freq: 1
000     # breakpoint
        nop     # 15 bytes pad for loops and calls

010   B1: # B6 B2 <- BLOCK HEAD IS JUNK   Freq: 1
010     # stack bang (128 bytes)
    pushq   rbp # Save rbp
    subq    rsp, #64    # Create frame

01c     movl    R13, [RDX + #8 (8-bit)] # int
020     movq    RBP, [RDX + #16 (8-bit)]    # ptr
024     movq    RCX, RDX    # spill
027     call_leaf,runtime  OSR_migration_end
        No JVM State Info
        # 
034     testq   RBP, RBP    # ptr
037     je,s   B6  P=0.001000 C=-1.000000
037
039   B2: # B8 B3 <- B1  Freq: 0.999
039     movl    R10, [RBP + #8 (8-bit)] # compressed klass ptr
03d     cmpl    R10, narrowklass: precise klass com/nbugs/logging/ManyThreadTest: 0x000000001fd79cb0:Constant:exact *   # compressed klass ptr
044     jne,us  B8  P=0.000001 C=-1.000000
044
046   B3: # B4 <- B2  Freq: 0.998999
046     # checkcastPP of RBP
046
046   B4: # B7 B5 <- B3 B6  Freq: 0.999999
046     movq    R10, java/lang/Class:exact *    # ptr
050     movl    R10, [R10 + #104 (8-bit)]   # int ! Field: com/nbugs/logging/ManyThreadTest.sum
054     cmpl    R10, #100
058     jge,s   B7  P=0.000001 C=-1.000000
058
05a   B5: # B5 <- B4 B5  top-of-loop Freq: 1e-035
05a     testl  rax, [rip + #offset_to_poll_page]    # Safepoint: poll for GC        # com.nbugs.logging.ManyThreadTest::threadTest @ bci:34  L[0]=RBP L[1]=R13 L[2]=_
        # OopMap{rbp=Oop off=90}
060     jmp,s   B5
060
062   B6: # B4 <- B1  Freq: 0.000999987
062     xorl    RBP, RBP    # ptr
064     jmp,s   B4
064
066   B7: # N83 <- B4  Freq: 1.01328e-006
066     movl    RDX, #-122  # int
06b     movl    [rsp + #32], R13    # spill
        nop     # 3 bytes pad for loops and calls
073     call,static  wrapper for: uncommon_trap(reason='predicate' action='maybe_recompile')
        # com.nbugs.logging.ManyThreadTest::threadTest @ bci:26  L[0]=RBP L[1]=rsp + #32 L[2]=_
        # OopMap{rbp=Oop off=120}
078     int3    # ShouldNotReachHere
078
079   B8: # N83 <- B2  Freq: 9.99e-007
079     movl    RDX, #-99   # int
07e     movl    [rsp + #32], R13    # spill
083     call,static  wrapper for: uncommon_trap(reason='constraint' action='reinterpret')
        # com.nbugs.logging.ManyThreadTest::threadTest @ bci:26  L[0]=RBP L[1]=rsp + #32 L[2]=_
        # OopMap{rbp=Oop off=136}
088     int3    # ShouldNotReachHere
088