Thanks in fact what i want to do is to log all comparisons at excecution. What is the best way to do that ?
Le lundi 4 mars 2019 13:15:53 UTC+1, Leszek Swirski a écrit : > > --force-slow-path is a bit confusing, and maybe not well named, I believe > it only affects some builtins (regex etc.) > > For some more detail, a lot of functionality in V8 is implemented multiple > times -- common, simpler fast paths (e.g. comparing numbers as you are) are > implemented in "assembly" (which used to be actual machine code, now it's > mostly CSA <https://v8.dev/docs/csa-builtins> or Torque > <https://v8.dev/docs/torque-builtins> code), less common "slow" paths > (e.g. comparing BigInts) will go to the "runtime" (i.e. into the C++ code). > These runtime functions also have fast and slow paths (which are really > more like medium speed and extra slow), and the flag you mentioned is for > forcing those slow paths. > > For specifically comparison, you probably want to hook into > CodeStubAssembler::Equal > <https://cs.chromium.org/chromium/src/v8/src/code-stub-assembler.cc?type=cs&q=CodeStubAssembler::Equal&sq=package:chromium&g=0&l=11680>, > > though keep in mind that the linked code is *generating* the comparison > code, not *calculating* or executing it. You'll also want to disable > optimisation (--no-opt) to make sure you don't enter optimized code (which > inlines the comparison). > > - Leszek > > On Mon, Mar 4, 2019 at 9:49 AM <exam...@gmail.com <javascript:>> wrote: > >> I have tried to add --force-slow-path argument and it does not change >> anything >> >> Le lundi 4 mars 2019 08:56:09 UTC+1, exam...@gmail.com a écrit : >>> >>> Thanks >>> >>> What do you mean by 'slow path' ? >>> Where should i put some code in order to hook comparisons operators ? >>> >> -- >> -- >> v8-dev mailing list >> v8-...@googlegroups.com <javascript:> >> http://groups.google.com/group/v8-dev >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-dev" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to v8-dev+un...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > -- -- v8-dev mailing list v8-dev@googlegroups.com http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-dev+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
