There is always a stack limit, which always prevents infinite recursion; as well as, in fact, finite but very deep recursion.
As Ben said, the only way to prevent infinite or long-running loops is by interrupting the program from another thread. You may have heard of the *Halting Problem*, TL;DR: there really can be no other way, because in the general case it is *impossible* to predict whether a loop will terminate at all, and how soon. There is no way to set a limit for executed instructions. You could hack it, but it's going to be non-trivial. On Sun, Nov 20, 2016 at 11:11 PM, <tbl...@icloud.com> wrote: > I don't think there's any way. V8 JavaScript code is compiled to native > code, and no instrumentation is really possible on that. > > On Sunday, November 20, 2016 at 10:18:24 AM UTC-8, James Lovejoy wrote: >> >> Really I need something a little more deterministic than a time limit. Is >> there a way to set an instruction limit? Or perhaps something similar to >> lua_sethook (http://pgl.yoyo.org/luai/i/lua_sethook) in Lua which calls >> a callback every given number of instructions. >> >> On Sun, Nov 20, 2016 at 4:02 AM, Ben Noordhuis <in...@bnoordhuis.nl> >> wrote: >> >>> On Sat, Nov 19, 2016 at 10:11 PM, James Lovejoy <jamesl...@gmail.com> >>> wrote: >>> > Hi, >>> > >>> > Is there a way to set a hard execution limit in the V8 engine? I want >>> to be >>> > able to prevent things like infinite loops and recursions. I realise >>> that >>> > since V8 compiles to machine code I don't get a program counter or >>> anything. >>> > I feel like setting the "stack limit" is the right way to go but the >>> usage >>> > of this feature from the documentation is unclear. Can someone guide >>> me as >>> > to how to achieve such a limit? >>> > >>> > James >>> >>> If 'execution limit' means 'time limit': start a watchdog thread and >>> call v8::Isolate::TerminateExecution() from that thread on timeout. >>> It must be a thread, it's not safe to call from a signal handler. >>> >>> -- >>> -- >>> v8-users mailing list >>> v8-u...@googlegroups.com >>> http://groups.google.com/group/v8-users >>> --- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "v8-users" group. >>> To unsubscribe from this topic, visit https://groups.google.com/d/to >>> pic/v8-users/Qwdd66xCtTU/unsubscribe. >>> To unsubscribe from this group and all its topics, 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.
