it seems WREC/JIT is disabled on Linux/X86, only available on MAC/WIN. right?
--- On Mon, 2/16/09, x yz <[email protected]> wrote: > From: x yz <[email protected]> > Subject: Re: [webkit-dev] webkit test ques/fail > To: [email protected] > Date: Monday, February 16, 2009, 4:26 AM > Hi, > I tried to run 02/13/09 code on Ubuntu 8.10/Intel two core > CPU and face a few errors. > > 1. how do I specifically test WREC/JIT? I just want to run > a specific code file so I can trace if sth wrong. I can run > GtkLauncher or jsc. > > 2. on architecture level how WREC/JIT are used in webkit? > how could I know the calling sequence? I can run some test > but how do I know whether WREC/JIT are called? what's > the running flow of WREC/JIT? > > 3. when I run_javascriptcore_tests the error is: > shell.js -f ./js1_6/String/regress-306591.js > > -#- Wrote results to 'actual.html'. > > > > ** Danger, Will Robinson! Danger! The following failures > have been introduced: > > ecma/Date/15.9.5.31-1.js > #hour diff 1 > ecma/Date/15.9.5.35-1.js > > ecma_3/Date/15.9.5.6.js > > > > You fixed the following test: > > ecma_3/Date/15.9.5.7.js > > > > 3 regressions found. > > 1 test fixed. > > > Errors include time difference of 1 hour (time zone wrong?) > or unexpected NaN. > > 4. when I run-webkit-tests: > ... > 3907 test cases (96%) succeeded > > 106 test cases (2%) had incorrect layout > > 35 test cases (<1%) were new > > 1 test case (<1%) timed out > > 9 test cases (<1%) crashed > > 138 test cases (3%) had stderr output > > > May be some errors are normal but how do I identify them? > > rgds > joe > > > > > --- On Wed, 1/28/09, Gavin Barraclough > <[email protected]> wrote: > > > From: Gavin Barraclough <[email protected]> > > Subject: Re: [webkit-dev] want to port JIT to MIPS, > any coworker or any hint? > > To: [email protected] > > Date: Wednesday, January 28, 2009, 4:55 PM > > On Jan 27, 2009, at 10:58 PM, x yz wrote: > > > > > Gavin, > > > last night I saw WREC when I search X86, and > realized > > many places > > > need to be touched. Your reply give more info and > > really help. > > > Thanks a lot. > > > > > > In Generator::generateEnter(), there is comment > > "On gcc the function > > > is regparm(3)...", how to understand that? > > > > WREC JIT generates a function with a C calling > convention > > that > > implements the regular expression. The entry and exit > from > > the > > function are generated by the generateEnter() and > > generateReturn*() > > methods. On OS X x86, the JIT generated function > > implements a > > regparm(3) calling convention (see WREC.h, the > generated > > code is > > called through a CompiledRegExp function pointer). > > > > > The function has no argument, why we peek four > > arguments from > > > stack(input,output,length,index)? > > > > These calls are not peeking values from the stack at > the > > time they are > > called; they are emitting JIT code that will will read > > values from the > > stack, when the JIT function has been generated and is > run. > > The JIT > > generated regular expression function is passed these > four > > arguments > > (again see WREC.h). > > > > As a note, you're best directing these emails at > the > > webkit-dev list > > in future, that way other people will also be able to > help > > you out. > > > > cheers, > > G. > > > > > > > > > > rgds > > > joe > > > > > > > > > --- On Tue, 1/27/09, Gavin Barraclough > > <[email protected]> wrote: > > > > > >> From: Gavin Barraclough > > <[email protected]> > > >> Subject: Re: [webkit-dev] want to port JIT to > > MIPS, any coworker or > > >> any hint? > > >> To: [email protected] > > >> Date: Tuesday, January 27, 2009, 5:10 AM > > >> On Jan 26, 2009, at 11:09 AM, x yz wrote: > > >> > > >>> Gavin, > > >>> Thanks, I really need to learn fast. > > >>> Where can I find more on WREC or its > spec? > > >> > > >> WREC is WebKit's regular expression JIT. > The > > spec it > > >> is implementing is the regular expression > syntax > > described > > >> in ECMA-262. > > >> > > >>> Which part of webkit is WREC? I just see > all > > assembler > > >> codes are in <assembler> and > <jit> and > > wonder > > >> whether I can just change them rather then > change > > WREC. > > >> > > >> WebKit contains two separate JITs, one for > the > > JavaScript > > >> language (in the 'jit' directory), > one for > > >> JavaScript's regular expression language > (in > > the > > >> 'wrec' directory). Both JITs make > use of > > the same > > >> assembler to emit code. WREC is a much > smaller, > > simpler > > >> JIT, which is why I suggest starting by > looking at > > this, but > > >> either JIT can be enabled independently of > the > > other. > > >> > > >>> Foresee SSE set may be a problem as MIPS > has > > no SSE. > > >> > > >> WREC does not use SSE, and I believe all JIT > code > > generated > > >> by the main JS JIT is guarded by the a > > configuration switch, > > >> JIT_OPTIMIZE_ARITHMETIC – this can be > disabled > > in > > >> Platform.h. > > >> > > >>> Sun's link for "The JIT Compiler > > Interface > > >> Specification" not valid anymore. > > >> > > >> Our JIT is all our own code, and written from > > scratch, so > > >> I'm not sure this documentation would > help > > you. > > >> > > >> Good luck, > > >> G. > > >> > > >> > > >>> MacroAssembler::breakpoint() is just int3 > > which I know > > >> used as debug int in X86. I'll see which > one > > used in gnu > > >> mips. > > >>> joe > > >>> > > >>> > > >>> > > >>> --- On Sun, 1/25/09, Gavin Barraclough > > >> <[email protected]> wrote: > > >>> > > >>>> From: Gavin Barraclough > > >> <[email protected]> > > >>>> Subject: Re: [webkit-dev] want to > port JIT > > to > > >> MIPS, any coworker or any hint? > > >>>> To: "WebKit Development" > > >> <[email protected]> > > >>>> Date: Sunday, January 25, 2009, 5:34 > PM > > >>>> On Jan 24, 2009, at 8:36 PM, x yz > wrote: > > >>>> > > >>>>> Just build webkit on XP using > cgywin, > > not > > >> tested yet. > > >>>> I want to port to 32bit MIPS, it > seems I > > need to > > >> touch JIT > > >>>> and rewrite assembler folder. > > >>>> > > >>>> Once you have the bytecode > interpreter up > > and > > >> running on > > >>>> MIPS, I'd recommend starting by > just > > trying to > > >> port WREC > > >>>> (the regular expression JIT). This > is a > > good > > >> starting point > > >>>> because it utilizes a smaller subset > of > > the > > >> MacroAssembler > > >>>> interface, and has a much simpler > > interface to C > > >> code (JIT > > >>>> code is called with C calling > conventions, > > and no > > >> callbacks > > >>>> are made into C from the JIT > generated > > code). > > >>>> > > >>>>> Any document there on > > javascripcore/assembler? > > >> I also > > >>>> want a smart way to make sure output > is > > correct. > > >>>> > > >>>> A very simple way to validate you are > > generating > > >> the > > >>>> correct code is to simply force the > JIT to > > insert > > >> a > > >>>> breakpoint (i.e. use > > MacroAssembler::breakpoint()) > > >> at the > > >>>> head of the function you are > generating, > > then run > > >> jsc under > > >>>> a debugger, and when it hits the > > breakpoint simply > > >>>> disassemble the code in memory at the > > point it has > > >> stopped. > > >>>> Now you can visually inspect that it > it > > has > > >> generated the > > >>>> code you were expecting. > > >>>> > > >>>> Good luck! > > >>>> G. > > >>>> > > >>>>> > > >>>>> > > >>>>> > > >>>>> > > >>>>> > > >>>>> > > >> > _______________________________________________ > > >>>>> webkit-dev mailing list > > >>>>> [email protected] > > >>>>> > > >>>> > > >> > > > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > > >>>> > > >>>> > > _______________________________________________ > > >>>> webkit-dev mailing list > > >>>> [email protected] > > >>>> > > >> > > > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > > >>> > > >>> > > >>> > > > > > > > > > _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
