i already did that and btw it is under the WTF/webkit . I'm interested how v8 handles javascript into every detail if u can guide me... Tell me which repository are being used by v8 on the related topic that would help me really much.
By when it is called i mean, which javascript code will enable me to call that funciton cause if u click u can't go any further than that, Il giorno lun 10 set 2018 alle ore 21:53 Jakob Kummerow < jkumme...@chromium.org> ha scritto: > On Mon, Sep 10, 2018 at 12:22 PM dan Med <litokis.ta...@gmail.com> wrote: > >> I don't quite see if this google group is useful or not, everybody keeps >> answering me with superficial things, >> > > You said you wanted to read the compiler's source but couldn't find it, so > I told you that it's in src/compiler/. If that was not the answer you > wanted, then try asking a different question? > > Please also keep in mind that people's time is limited. The easier/quicker > it is to answer your question, the more likely you are to get an answer. > > i don't care about the trminology like tell me which allocator it uses >> when and why or at least if there's something i can read to understand..... >> I'm surprised u don't know what a JIT page is, basically if you call a >> function foo() let's say 100 times then v8,had enough time to understand >> the parameters given to that specific function and how to optimize it >> efficently based on it's prediction/observation. >> >> I'm not interested in the terminology of things, (that's just a matter of >> reading the source code ) i'm more in reading how it works when and why.. >> > > It's great that you want to understand how things work. Terminology is an > important aspect of that though, because it enables communication. If we > use different words for the same thing, we won't understand each other. > Based on your explanation, I'm guessing that by "JIT page" you mean "the > strategy V8 uses to select functions for optimization". The core of that > logic is in MarkCandidatesForOptimization in src/runtime-profiler.cc. > > >> For example when is ArrayBufferBuilder::Append called ?? >> > > I don't know; it's not part of V8. But you can use Code Search to find out > where anything is called, just click the function in question to get a list > of call sites: > https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?q=ArrayBufferBuilder&sq=package:chromium&g=0&l=61 > > >> And i thing i've looked at the entire v8 source code but didn't find >> much, apart from the array.js file which describes some javascript >> function, i don't understand where's the rest.... >> > > > Il giorno lun 10 set 2018 alle ore 20:45 Jakob Kummerow < >> jkumme...@chromium.org> ha scritto: >> >>> On Sun, Sep 9, 2018 at 8:54 AM dan Med <litokis.ta...@gmail.com> wrote: >>> >>>> Oh and one more thing, i've surfed perhaps the entire source code of v8 >>>> at least the interesting parts, but what i came across was just very short >>>> code execpt for some builtins written in javascript i believe, can't find >>>> all of the things i've found on the documentation such as the interpreter >>>> >>> >>> src/interpreter/ >>> >>> >>>> and the JIT compilers, >>>> >>> >>> src/compiler/ >>> >>> >>>> one more thing i'd like to understand how the memory is handeled like >>>> how can i read about the JIT pages, >>>> >>> >>> What's a JIT page? >>> >>> >>>> or which memory allocator does v8 use >>>> >>> >>> It uses several allocation techniques for different purposes. >>> >>> >>>> and it's garbage collector >>>> >>> >>> src/heap/ >>> >>> >>>> >>>> Thank you ! >>>> >>>> Il giorno dom 9 set 2018 alle ore 17:51 dan Med < >>>> litokis.ta...@gmail.com> ha scritto: >>>> >>>>> I don't have understood this part, let me explain it to you. >>>>> This is how i get it tell me if i'm wrong at any part. >>>>> >>>>> I need to understand how is the structure in memory of the arraybuffer >>>>> how is it represented and if the data of the array are directly stored at >>>>> an offset accessed by buffer_ -> data(). >>>>> >>>>> >>>>> before the call to expand capacity it does create an array >>>>> >>>>> >>>>> the arraybuffer in src <https://cs.chromium.org/chromium/src/>/ >>>>> third_party <https://cs.chromium.org/chromium/src/third_party/>/blink >>>>> <https://cs.chromium.org/chromium/src/third_party/blink/>/renderer >>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/>/ >>>>> platform >>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/> >>>>> /wtf >>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/> >>>>> /typed_arrays >>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/> >>>>> /array_buffer_builder.cc >>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc> >>>>> is >>>>> called whenever the renderer (has to execute some javascript which >>>>> defines >>>>> arraybuffers) >>>>> First when is arraybuffer::append called, cause i know that if >>>>> someone need to reallocate a bigger arraybuffer then a new instance will >>>>> be >>>>> created and filled with the old values if the length in the original array >>>>> isn't has much as the user reqeusted ? >>>>> >>>>> One more thing is, when this class is called, the arraybuffer is >>>>> always set to the initial length of static const int >>>>> kDefaultBufferCapacity >>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc?l=38&gs=kythe%253A%252F%252Fchromium%253Flang%253Dc%25252B%25252B%253Fpath%253Dsrc%252Fthird_party%252Fblink%252Frenderer%252Fplatform%252Fwtf%252Ftyped_arrays%252Farray_buffer_builder.cc%2523YXDT7WTpXCAcuhdyTlkuCzsfCzI%25252BoHLRFAlkbCrkx4g%25253D&gsn=kDefaultBufferCapacity&ct=xref_usages> >>>>> = 32768; if in the javascript i declare an arraybuffer of 20bytes >>>>> will it allocate of >>>>> 32768bytes anyway =? >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> Il giorno mar 4 set 2018 alle ore 12:14 Graham Reeves < >>>>> gra...@grahamreeves.com> ha scritto: >>>>> >>>>>> > is std::numeric_limits >>>>>> <https://cs.chromium.org/chromium/src/buildtools/third_party/libc%2B%2B/trunk/include/limits?l=442&ct=xref_jump_to_def&gsn=numeric_limits> >>>>>> <unsigned>::max >>>>>> <https://cs.chromium.org/chromium/src/buildtools/third_party/libc%2B%2B/trunk/include/limits?l=450&ct=xref_jump_to_def&gsn=max>(); >>>>>> referring to the max unsigned int value ? cause the source code won't >>>>>> find >>>>>> it >>>>>> Yes, that's the maximum value unsigned (an unsigned int) can be, but >>>>>> what do you mean by, the source won't find it? >>>>>> >>>>>> On Monday, 3 September 2018 19:55:48 UTC+1, dan Med wrote: >>>>>>> >>>>>>> Can someone help me out? >>>>>>> >>>>>>> Il giorno sab 1 set 2018 alle ore 15:30 <litoki...@gmail.com> ha >>>>>>> scritto: >>>>>>> >>>>>>>> array_buffer_builder.cc in src >>>>>>>> <https://cs.chromium.org/chromium/src/>/third_party >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/>/blink >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/>/renderer >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/>/ >>>>>>>> platform >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/> >>>>>>>> /wtf >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/> >>>>>>>> /typed_arrays >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/> >>>>>>>> /array_buffer_builder.cc >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc> >>>>>>>> >>>>>>>> the ArrayBufferBuilder >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=44&ct=xref_jump_to_def&gsn=ArrayBufferBuilder> >>>>>>>> ::Append >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc?l=74&gs=kythe%253A%252F%252Fchromium%253Flang%253Dc%25252B%25252B%253Fpath%253Dsrc%252Fthird_party%252Fblink%252Frenderer%252Fplatform%252Fwtf%252Ftyped_arrays%252Farray_buffer_builder.cc%2523NFGzJegTouRzc7WYe5NO52sD3rtLZRfs3mHeMLIQn8I%25253D&gsn=Append&ct=xref_usages> >>>>>>>> method >>>>>>>> will be called through a view on top of the arraybuffer? something >>>>>>>> like, >>>>>>>> there's a arraybuffer of 30bytes in length and we define a view on top >>>>>>>> of >>>>>>>> it (so a typedarray) wehn i call on the new typedarray object the >>>>>>>> .append >>>>>>>> method it will call ArrayBufferBuilder >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=44&ct=xref_jump_to_def&gsn=ArrayBufferBuilder> >>>>>>>> ::Append >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc?l=74&gs=kythe%253A%252F%252Fchromium%253Flang%253Dc%25252B%25252B%253Fpath%253Dsrc%252Fthird_party%252Fblink%252Frenderer%252Fplatform%252Fwtf%252Ftyped_arrays%252Farray_buffer_builder.cc%2523NFGzJegTouRzc7WYe5NO52sD3rtLZRfs3mHeMLIQn8I%25253D&gsn=Append&ct=xref_usages> >>>>>>>> and then inside it's code it will execute ArrayBufferBuilder >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=44&ct=xref_jump_to_def&gsn=ArrayBufferBuilder> >>>>>>>> ::ExpandCapacity >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc?l=45&gs=kythe%253A%252F%252Fchromium%253Flang%253Dc%25252B%25252B%253Fpath%253Dsrc%252Fthird_party%252Fblink%252Frenderer%252Fplatform%252Fwtf%252Ftyped_arrays%252Farray_buffer_builder.cc%2523Fu6GnwJLuMqh5Thz%25252BDq0LStBEA8HzkICqnAPtIOPIhY%25253D&gsn=ExpandCapacity&ct=xref_usages> >>>>>>>> if >>>>>>>> it needs to reallocate the array ? >>>>>>>> >>>>>>>> if so inside the expandCapacity definition bytes_used >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=92&ct=xref_jump_to_def&gsn=bytes_used_> >>>>>>>> referes >>>>>>>> to the elements inside the actual arraybuffer so if i have a >>>>>>>> arraybuffer >>>>>>>> which is 8 bytes in length [ ][ ][ ][ ][ ][ ][ ][ ] and i fill in only >>>>>>>> 3 >>>>>>>> bytes so >>>>>>>> [1][2][3][ ][ ][ ][ ][ ] the bytes_used >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=92&ct=xref_jump_to_def&gsn=bytes_used_> >>>>>>>> when >>>>>>>> retrieved will be set to 3 bytes ?? >>>>>>>> >>>>>>>> ArrayBufferBuilder >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=44&ct=xref_jump_to_def&gsn=ArrayBufferBuilder>::ArrayBufferBuilder >>>>>>>> >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc?l=40&gs=kythe%253A%252F%252Fchromium%253Flang%253Dc%25252B%25252B%253Fpath%253Dsrc%252Fthird_party%252Fblink%252Frenderer%252Fplatform%252Fwtf%252Ftyped_arrays%252Farray_buffer_builder.cc%2523lcp23D0sHKN2WnDoJe7UbBQtgQbZY3lJ%25252Bn9qnDlawck%25253D&gsn=ArrayBufferBuilder&ct=xref_usages>() >>>>>>>> : bytes_used_ >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=92&ct=xref_jump_to_def&gsn=bytes_used_>(0), >>>>>>>> variable_capacity_ >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=93&ct=xref_jump_to_def&gsn=variable_capacity_>(true) >>>>>>>> { buffer_ >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.h?l=94&ct=xref_jump_to_def&gsn=buffer_> >>>>>>>> = >>>>>>>> <https://cs.chromium.org/chromium/src/base/memory/scoped_refptr.h?l=226&ct=xref_jump_to_def&gsn=%3D> >>>>>>>> ArrayBuffer >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer.h?l=42&ct=xref_jump_to_def&gsn=ArrayBuffer>::Create >>>>>>>> >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer.h?l=125&ct=xref_jump_to_def&gsn=Create>(kDefaultBufferCapacity >>>>>>>> >>>>>>>> <https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_builder.cc?l=38&ct=xref_jump_to_def&gsn=kDefaultBufferCapacity>, >>>>>>>> 1);} >>>>>>>> here buffer_ will be equal to an arraybuffer of 32768 bytes in length >>>>>>>> ? since the KdefaultBuffer... is set to that value. >>>>>>>> is std::numeric_limits >>>>>>>> <https://cs.chromium.org/chromium/src/buildtools/third_party/libc%2B%2B/trunk/include/limits?l=442&ct=xref_jump_to_def&gsn=numeric_limits><unsigned>::max >>>>>>>> >>>>>>>> <https://cs.chromium.org/chromium/src/buildtools/third_party/libc%2B%2B/trunk/include/limits?l=450&ct=xref_jump_to_def&gsn=max>(); >>>>>>>> referring to the max unsigned int value ? cause the source code won't >>>>>>>> find it >>>>>>>> >>>>>>>> -- >>>>>>>> -- >>>>>>>> v8-users mailing list >>>>>>>> v8-u...@googlegroups.com >>>>>>>> http://groups.google.com/group/v8-users >>>>>>>> --- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "v8-users" group. >>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>> send an email to v8-users+u...@googlegroups.com. >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> -- >>>>>> -- >>>>>> v8-users mailing list >>>>>> v8-users@googlegroups.com >>>>>> http://groups.google.com/group/v8-users >>>>>> --- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "v8-users" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to v8-users+unsubscr...@googlegroups.com. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> -- >>>> -- >>>> v8-users mailing list >>>> v8-users@googlegroups.com >>>> http://groups.google.com/group/v8-users >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "v8-users" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to v8-users+unsubscr...@googlegroups.com. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> -- >>> -- >>> v8-users mailing list >>> v8-users@googlegroups.com >>> http://groups.google.com/group/v8-users >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "v8-users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to v8-users+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- >> -- >> v8-users mailing list >> v8-users@googlegroups.com >> http://groups.google.com/group/v8-users >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to v8-users+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > -- > -- > v8-users mailing list > v8-users@googlegroups.com > http://groups.google.com/group/v8-users > --- > You received this message because you are subscribed to the Google Groups > "v8-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to v8-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. 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