2009/5/28 Søren Gjesse <[email protected]>:
> The flag is --print-code which will print all code generated, and the flag
> in only available for a debug build. When your first functions are compiled
> you will see compilation of some internal stuff, and as a lot of the
> builtins as lazily compiled you will see auxiliary code generation first
> time some builtins are used. E.g. the function 'function
> f(){"sss".indexOf('s')}' when run for the first time will cause parts of the
> String implementation to get compiled as well (large parts of the String
> implementation is in JavaScript). To avoid this and to see the code for your
> functions "immediately" you can add the --nolazy flag as well to turn off
> lazy compilation. Without lazy compilation all functions will be egerly
> compiled when added and not on first use.
>
Thank you. Soren.
I open v8_shell using '-print-code -nolazy' options. And I just enter
'function f(){"sss".indexOf('s')}' at the d8 prompt.
BUt why do I see 3 'Raw source' output below?
--- Raw source ---
(){"sss".indexOf('s')}
--- Raw source ---
function f(){"sss".indexOf('s')}
--- Raw source ---
({"seq":3,"type":"event","event":"afterCompile","success":true,"body":{"script":{"handle":1,"type":"script","name":"(d8)","id":27,"lineOffset":0,"columnOffset":0,"lineCount":1,"source":"function
f(){\"sss\".indexOf('s')}\n","sourceLength":33,"scriptType":2,"context":{"ref":0},"text":"(d8)
(lines: 1)"}},"refs":[{"handle":0,"type":"context","text":"#<a
ContextMirror>"}],"running":true})
d8> function f(){"sss".indexOf('s')}
--- Raw source ---
(){"sss".indexOf('s')}
--- Code ---
kind = FUNCTION
name = f
Instructions (size = 124)
0x182a7c0 0 f7c701000000 test edi,0x1
0x182a7c6 6 0f850d000000 jnz 25 (0x182a7d9)
0x182a7cc 12 50 push eax
0x182a7cd 13 6828d82000 push 0x20d828
0x182a7d2 18 6a00 push 0x0
0x182a7d4 20 e827d7c4fe call 0x477f00 ;; debug:
statement 10
;; code:
STUB, Runtime, RuntimeStub_Abort
0x182a7d9 25 8b47ff mov eax,[edi+0xff]
0x182a7dc 28 8078079d cmpb [eax+0x7],0x9d
0x182a7e0 32 0f840d000000 jz 51 (0x182a7f3)
0x182a7e6 38 50 push eax
0x182a7e7 39 6864d82000 push 0x20d864
0x182a7ec 44 6a00 push 0x0
0x182a7ee 46 e80dd7c4fe call 0x477f00 ;; code:
STUB, Runtime, RuntimeStub_Abort
0x182a7f3 51 55 push ebp
0x182a7f4 52 8bec mov ebp,esp
0x182a7f6 54 56 push esi
0x182a7f7 55 57 push edi
0x182a7f8 56 3b25e8b32600 cmp esp,[0x26b3e8]
0x182a7fe 62 0f822e000000 jc 114 (0x182a832)
0x182a804 68 83ec0c sub esp,0xc
0x182a807 71 c745f47d1f6001 mov [ebp+0xf4],0x1601f7d ;;
object: 0x1601f7d <String[7]: indexOf>
0x182a80e 78 c745f07de86001 mov [ebp+0xf0],0x160e87d ;;
object: 0x160e87d <String[3]: sss>
0x182a815 85 c745ecc5106001 mov [ebp+0xec],0x16010c5 ;;
object: 0x16010c5 <String[1]: s>
0x182a81c 92 e8ffd8c4fe call 0x478120 ;; debug:
statement 13
;; debug:
position 19
;; code:
CALL_IC, UNINITIALIZED, argc = 1
0x182a821 97 8b75fc mov esi,[ebp+0xfc]
0x182a824 100 83c404 add esp,0x4
0x182a827 103 b835016001 mov eax,0x1600135 ;;
object: 0x1600135 <undefined>
0x182a82c 108 8be5 mov esp,ebp ;; debug:
statement 32
;; js return
0x182a82e 110 5d pop ebp
0x182a82f 111 c20400 ret 0x4
0x182a832 114 e829dcc4fe call 0x478460 ;; debug:
statement 10
;; code:
STUB, StackCheck, minor: 0
0x182a837 119 8b7df8 mov edi,[ebp+0xf8]
0x182a83a 122 ebc8 jmp 68 (0x182a804)
RelocInfo (size = 20)
0x182a7d4 statement position (10)
0x182a7d5 code target (STUB) (0x477f00)
0x182a7ef code target (STUB) (0x477f00)
0x182a80a embedded object (0x1601f7d <String[7]: indexOf>)
0x182a811 embedded object (0x160e87d <String[3]: sss>)
0x182a818 embedded object (0x16010c5 <String[1]: s>)
0x182a81c statement position (13)
0x182a81c position (19)
0x182a81d code target (CALL_IC) (0x478120)
0x182a828 embedded object (0x1600135 <undefined>)
0x182a82c statement position (32)
0x182a82c js return
0x182a832 statement position (10)
0x182a833 code target (STUB) (0x478460)
--- Raw source ---
function f(){"sss".indexOf('s')}
--- Code ---
kind = FUNCTION
Instructions (size = 99)
0x182a8a0 0 f7c701000000 test edi,0x1
0x182a8a6 6 0f850d000000 jnz 25 (0x182a8b9)
0x182a8ac 12 50 push eax
0x182a8ad 13 6828d82000 push 0x20d828
0x182a8b2 18 6a00 push 0x0
0x182a8b4 20 e847d6c4fe call 0x477f00 ;; debug:
statement 0
;; code:
STUB, Runtime, RuntimeStub_Abort
0x182a8b9 25 8b47ff mov eax,[edi+0xff]
0x182a8bc 28 8078079d cmpb [eax+0x7],0x9d
0x182a8c0 32 0f840d000000 jz 51 (0x182a8d3)
0x182a8c6 38 50 push eax
0x182a8c7 39 6864d82000 push 0x20d864
0x182a8cc 44 6a00 push 0x0
0x182a8ce 46 e82dd6c4fe call 0x477f00 ;; code:
STUB, Runtime, RuntimeStub_Abort
0x182a8d3 51 55 push ebp
0x182a8d4 52 8bec mov ebp,esp
0x182a8d6 54 56 push esi
0x182a8d7 55 57 push edi
0x182a8d8 56 6879084501 push 0x1450879 ;;
object: 0x1450879 <FixedArray[2]>
0x182a8dd 61 56 push esi
0x182a8de 62 6a00 push 0x0
0x182a8e0 64 e83b3ec5fe call 0x47e720 ;; code:
STUB, Runtime, RuntimeStub_DeclareGlobals
0x182a8e5 69 3b25e8b32600 cmp esp,[0x26b3e8]
0x182a8eb 75 0f820b000000 jc 92 (0x182a8fc)
0x182a8f1 81 b835016001 mov eax,0x1600135 ;;
object: 0x1600135 <undefined>
0x182a8f6 86 8be5 mov esp,ebp ;; debug:
statement 33
;; js return
0x182a8f8 88 5d pop ebp
0x182a8f9 89 c20400 ret 0x4
0x182a8fc 92 e85fdbc4fe call 0x478460 ;; debug:
statement 0
;; code:
STUB, StackCheck, minor: 0
0x182a901 97 ebee jmp 81 (0x182a8f1)
RelocInfo (size = 14)
0x182a8b4 statement position (0)
0x182a8b5 code target (STUB) (0x477f00)
0x182a8cf code target (STUB) (0x477f00)
0x182a8d9 embedded object (0x1450879 <FixedArray[2]>)
0x182a8e1 code target (STUB) (0x47e720)
0x182a8f2 embedded object (0x1600135 <undefined>)
0x182a8f6 statement position (33)
0x182a8f6 js return
0x182a8fc statement position (0)
0x182a8fd code target (STUB) (0x478460)
--- Raw source ---
({"seq":3,"type":"event","event":"afterCompile","success":true,"body":{"script":{"handle":1,"type":"script","name":"(d8)","id":27,"lineOffset":0,"columnOffset":0,"lineCount":1,"source":"function
f(){\"sss\".indexOf('s')}\n","sourceLength":33,"scriptType":2,"context":{"ref":0},"text":"(d8)
(lines: 1)"}},"refs":[{"handle":0,"type":"context","text":"#<a
ContextMirror>"}],"running":true})
--- Code ---
kind = FUNCTION
Instructions (size = 148)
0x182a960 0 f7c701000000 test edi,0x1
0x182a966 6 0f850d000000 jnz 25 (0x182a979)
0x182a96c 12 50 push eax
0x182a96d 13 6828d82000 push 0x20d828
0x182a972 18 6a00 push 0x0
0x182a974 20 e887d5c4fe call 0x477f00 ;; debug:
statement 0
;; code:
STUB, Runtime, RuntimeStub_Abort
0x182a979 25 8b47ff mov eax,[edi+0xff]
0x182a97c 28 8078079d cmpb [eax+0x7],0x9d
0x182a980 32 0f840d000000 jz 51 (0x182a993)
0x182a986 38 50 push eax
0x182a987 39 6864d82000 push 0x20d864
0x182a98c 44 6a00 push 0x0
0x182a98e 46 e86dd5c4fe call 0x477f00 ;; code:
STUB, Runtime, RuntimeStub_Abort
0x182a993 51 55 push ebp
0x182a994 52 8bec mov ebp,esp
0x182a996 54 56 push esi
0x182a997 55 57 push edi
0x182a998 56 b835016001 mov eax,0x1600135 ;;
object: 0x1600135 <undefined>
0x182a99d 61 50 push eax
0x182a99e 62 3b25e8b32600 cmp esp,[0x26b3e8]
0x182a9a4 68 0f8240000000 jc 138 (0x182a9ea)
0x182a9aa 74 8b7f17 mov edi,[edi+0x17]
0x182a9ad 77 8b471f mov eax,[edi+0x1f]
0x182a9b0 80 3d35016001 cmp eax, 0x1600135 ;;
object: 0x1600135 <undefined>
0x182a9b5 85 0f8414000000 jz 111 (0x182a9cf)
0x182a9bb 91 83ec04 sub esp,0x4
0x182a9be 94 8945f0 mov [ebp+0xf0],eax
0x182a9c1 97 e8fab5c6fe call 0x495fc0 ;; code:
STUB, Runtime, RuntimeStub_CloneLiteralBoilerplate
0x182a9c6 102 8945f4 mov [ebp+0xf4],eax
0x182a9c9 105 8be5 mov esp,ebp ;; js return
0x182a9cb 107 5d pop ebp
0x182a9cc 108 c20400 ret 0x4
0x182a9cf 111 83ec0c sub esp,0xc
0x182a9d2 114 897df0 mov [ebp+0xf0],edi
0x182a9d5 117 c745ec0c000000 mov [ebp+0xec],0xc
0x182a9dc 124 c745e8d9d54601 mov [ebp+0xe8],0x146d5d9 ;;
object: 0x146d5d9 <FixedArray[14]>
0x182a9e3 131 e878a2c5fe call 0x484c60 ;; code:
STUB, Runtime, RuntimeStub_CreateObjectLiteralBoilerplate
0x182a9e8 136 ebd1 jmp 91 (0x182a9bb)
0x182a9ea 138 e871dac4fe call 0x478460 ;; code:
STUB, StackCheck, minor: 0
0x182a9ef 143 8b7df8 mov edi,[ebp+0xf8]
0x182a9f2 146 ebb6 jmp 74 (0x182a9aa)
RelocInfo (size = 12)
0x182a974 statement position (0)
0x182a975 code target (STUB) (0x477f00)
0x182a98f code target (STUB) (0x477f00)
0x182a999 embedded object (0x1600135 <undefined>)
0x182a9b1 embedded object (0x1600135 <undefined>)
0x182a9c2 code target (STUB) (0x495fc0)
0x182a9c9 js return
0x182a9df embedded object (0x146d5d9 <FixedArray[14]>)
0x182a9e4 code target (STUB) (0x484c60)
0x182a9eb code target (STUB) (0x478460)
d8>
> Regards,
> Søren
>
> On Wed, May 27, 2009 at 19:13, Mikhail Naganov <[email protected]> wrote:
>>
>> Actually, I don't see any switch in shell to print disassembler dump,
>> but you can look into test/cctest/test-log-ia32.cc to see how it can
>> be programmed.
>>
>> In a debug build, you can do the following:
>>
>> v8::internal::Handle<v8::internal::JSFunction> func =
>> CompileFunction(<your code>);
>> v8::internal::Code* func_code = func->code();
>> func_code->Print();
>>
>> But remember that functions are compiled lazily. If you've declared a
>> function, it doesn't get compiled until the first call to it. Put all
>> your code into top-level script if you want it to be compiled
>> immediately.
>>
>> On Wed, May 27, 2009 at 20:22, silverburgh <[email protected]>
>> wrote:
>> >
>> >
>> > In here,
>> > http://code.google.com/apis/v8/design.html
>> > it dumps the machine code for 'point.x'.
>> >
>> > How can I dump the machine code for my JS file that I give to V8?
>> >
>> > Thank you.
>> >
>> >
>> >
>> > >
>> >
>>
>> >>
>
>
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