--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 <[email protected]> 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, [email protected] 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 > [email protected] > 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 [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- v8-dev mailing list [email protected] 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
